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DI Driver Module Kit

1. Calculated duty cycle that limits the Low Side Driver from exceeding the current limitations on the HPV HPV_DCMin Manual set point that coerces the output of the PID controller to not drop below this value unless the HPV is disabled HPV_DutyCycle Duty cycle that is written to the Low Side driver regardless of what mode the controller is in This duty cycle is only applied if HPVEnable is TRUE HPV_PID Duty cycle that is output by the PID controller This value is added to the feed forward value to calculate the HPV_DutyCycle This is value shows you the influence of the PID controller on HPV_DutyCycle HPVNomResitance Ohm Nominal resistance of the HPV This value is used to calculate the maximum duty cycle that can be used to control the HPV A maximum duty cycle is calculated to prevent the current limit of the Low Side Driver channel from being exceeded It is important to measure this resistance correctly within 0 5 ohms HPVFreq Hz Frequency of PWM controlling HPV FuelPControlMode IMV PID Model HPV PID Mode Changes the rail pressure control method between PID controlling the IMV and keeping the HPV at a fixed value duty cycle IMV PID Mode and PID controlling the HPV and keeping the IMV at a fixed duty cycle HPV PID Mode RailPSetpoint bar Desired rail pressure when rail pressure is PID controlled RailP_FaultClear Boolean Clears RailPFault once the fault has been resolved RailPFault Boolean Rail press
2. 6 Channel SADI Driver System SADI6 gt 1cRIO 9012 RT Controller gt 1cRIO 9111 4 Slot FPGA Chassis gt 2Drivven DI Driver Modules gt 1cRIO 9411 Digital Inout Module 9 Channel SADI Driver System SADIQ gt 1cRIO 9012 RT Controller gt 1cRIO 9112 8 Slot FPGA Chassis gt 3Drivven DI Driver Modules gt 2cRIO 9411 Digital Inout Modules 12 Channel SADI Driver System SADI12 gt 1cRIO 9012 RT Controller gt 1cRIO 9112 8 Slot FPGA Chassis gt 4 Drivven DI Driver Modules gt 2cRIO 9411 Digital Inout Modules Advanced Software Package Drivven also offers an Advanced Software Package with each system which includes the following additional features Engine Position Tracking EPT This feature takes cam and crank signals as inputs and tracks the crankshaft angle for two stroke or four stroke engine cycles The crank and cam signals can be from an optical encoder and camshaft sensor or from production crank and cam position sensors VR sensors require additional hardware The EPT feature allows the user to enter the start of injection angles and durations for injection events Up to five pulses per cycle are possible Rail Pressure Control With the addition of a Drivven Low Side Driver and an NI 9215 common rail fuel pressure can be controlled The software uses the NI 9215 to measure the rail pressure while using the Low Side Driver to PWM the Inlet Metering Valve IMV and the High Pressure Valve HPV on the rail with a closed
3. DI1 PzProfConstStart DI PzProfConst D I WorkingProfileSelect DIi SendProfileToRT DI1_GetProfileFromRT 0 0 DC Piezo Profile ON d DI1 PzProfConstLength DI1_PzApplyProfConst DIi Copy DIi To DI1_CopyProfileNow 0 PzProfOn f PzProfOff d Sine function Parameters DIi_PzInputMultiplier DI1_PzInputAdder 1 10 DIi PzProfGraph DI PzProfSlider 00 ir J 35 801 0 8 s D 3 DI1 PzProfldxSet 2127 DI1_PzProfldx 4 z 13 6 2 Oh bk 10 05 25 5 D I PzOutputMultiplier DI1_PzOutputAdder 100 BS 60 60 40 a H 1 1 U I 1 1 U 1 100 110 120 128 40 20 20 DI1_SineFunctionMode DI1_PzProfCursorMode 0 0 142 8 Figure 13 User Interface of DI Piezo Profiler Please refer to the DI Driver User Manual for further information on calibrating for piezo injectors Each Pulse referred to in this section is equal to 2 usec DIX_PzProfConstStart Pulse Sets the start location 0 128 for the constant duty cycle value to be applied to the piezo profile DIX_PzProfConstLength Pulses Sets the length for the constant duty cycle value to be applied to the piezo profile DIX_PzProfConst DC Sets the duty cycle constant to be applied to the piezo profile DIX_PzApplyProfConst Boolean Applies the constant duty cycle value to the piezo profile DIX_SineFunction Mode Boolean When set to FUNCTION then a sine wave is applied to the piezo profile When set to MANUAL then the piezo profile may be
4. DIX_Peak2Current A This is the current level which will be targeted by the injector driver circuit from the end of HVPeakTime msec to the end of PeakTime msec using battery voltage This value should be set to the current level which best implements a similar current profile to the OEM operation If this intermediate current level is not necessary then set the value equal to the hold current level If your DI Driver module contains firmware previous to version E1 then the driver will use the PeakCurrent value for the remainder of PeakTime DIX_HoldCurrent A The target current level which is driven through the injector solenoid after the expiration of PeakTime and until the end of the injection pulse DIX_HVPeakTime msec The time period at the beginning of the injection pulse during which the high voltage supply is used to drive current through the injector solenoid HVPeakTime may range from Omsec to 0 4msec This parameter should be adjusted in small increments decrements 0 005 msec to achieve the initial peak current level using high voltage DIX_BackBoostTime msec The time period at the end of the injection pulse for which the back emf of the injector solenoid is directed to the internal boost power supply BackBoostTime may range from Omsec to 1 6msec DIX_OneShotEnable Boolean When TRUE the OneShot mode is enabled and the OneShot Boolean may be pressed to generate a 1 msec one shot pulse to channel 1 of the module
5. DIX_OneShot Boolean When pressed and OneShotEnable is TRUE the DI Driver module will deliver a 1 msec one shot pulse to channel 1 This Boolean returns to the FALSE state automatically DIX_PeakTime msec Determines the length of time that the driver circuit will use peak current as the current control threshold PeakTime may range from 0 msec to 0 6 msec DIX_TriggerFilter usec Determines the amount of digital input command signal noise rejection For example a value of 1 would reject a low or high signal glitch of up to 1 usec width Please note that the filter also causes a signal delay of the same amount of time This value can range from 0 to 1638 usec CriticalFault Boolean Indicates that a critical fault occurred with any of the DI Driver modules This Boolean will sometimes indicate TRUE while the modules are being calibrated This is normal behavior and can be ignored Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 24 Drivven Inc SADI Driver System DIX_ChanXEnable Boolean When ON channel X is enabled and is operated according to TriggerPolarity and the respective external command DIX_PiezoEnable Boolean When ON the DI Driver module will operate in piezo mode according to the settings on the DIX Piezo Profiler tab This button is highlighted red when OFF to provide warning that solenoid injectors are being controlled This is because piezo injectors can be damaged when controlled in soleno
6. SADI Driver System Connecting Injectors Each direct injector will have two leads The polarity of the injector leads typically does not matter for solenoid injectors but does matter for piezo injectors Each DI Driver module has three pairs of screw terminals for three injectors The screw terminals are labeled INJX and INJX When connecting more than one injector to a SADI there are a few steps that should be taken to optimize the system Individual DI driver modules can only drive one injector at a time Therefore if any injection events overlap or require simultaneous operation then they must be operated from different modules For SADI Driver Systems that have more than one DI driver care should be taken to optimize the load on the DI Drivers power supplies Optimizing the power supplies is obtained by sequencing injection events in a way that prevents two sequential injection events on different injectors from happening on the same DI driver As an example for a SADI 12 running a V10 with solenoid injectors and firing order of 1 10 9 4 3 6 5 8 7 2 the injectors should be connected as shown in Table 3 Table 3 Example Routing of NI 9411 Digital Inputs to DI Driver Channels wans 1 DIDrver2Ghamel2 6 wauz eng DiDrveraChamelt o Noate Charels 01DrveraChamel2 Some solenoid injectors with very low inductance require additional inductance added in series with the injectors in order to obtain proper current control
7. CrankCount am Crank 0 RPM 0 CAD 0 RPM 0 pulses CrankRunThreshold CamExtension 0 PM 0 8 InvertCam CamOffset MissedCrankFlag NORMAL 0 MissedGapFlag CamExtEnable CrankFiltTime NORMAL 0 NoCamFlag CamOffsetEnable CamFiltTime NORMAL 0 usec NORMAL Figure 18 EPT Tab User Interface The controls and indicators on this tab are not active unless the Mode Selection control is set to EPT mode Common Variables between N M N 1 and ENC NumberOfCrankTeeth Specifies the number of teeth on the crankshaft trigger wheel as if there were no missing or extra crank teeth For example a 60 2 crankshaft pattern would have NumberOfCrankTeeth 60 For encoders this is the pulses per crank revolution Stroke Boolean FALSE 2 TRUE 4 When FALSE the EPT is tracking teeth from 0 to NumberOfCrankTeeth When TRUE the EPT is tracking teeth from 0 to 2 NumberOfCrankT eeth StallSpeed RPM A measured crankshaft speed less than StallSpeed causes the engine speed to be reported as zero the CrankStalled output to report as TRUE and EngineStatus to be Stalled CrankRunThreshold RPM A measured crankshaft speed less than CrankRunThreshold but higher than StallSpeed causes the EngineStatus to be reported as Cranking and Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 35 Drivven Inc SADI Driver System CrankStalled RPM to display as Spinning Any engine speed measured above
8. CrankRuntThreshold will display Running in EngineStatus InvertCam Boolean Inverts the incoming cam signal InvertCrank Boolean Inverts the incoming crank signal CamExtEnable Boolean When enabled the cam signal is extended or possibly shortened by the number of rising edges of the crank signal as specified by CamExtension and referenced to the rising edge of the cam signal When disabled the cam signal is unaltered CamExtension Teeth The number of crank pulses to extend the camshaft signal CamOffsetEnable Boolean When enabled the cam signal is offset by the number of rising edges of the crank signal as specified by CamOffset and referenced to the rising edge of the crank signal which immediately follows the rising edge of the cam signal The offset cam signal will go high at the falling edge of the crankshaft signal immediately following the specified number of rising edges of the crankshaft The offset cam signal will go low at the following rising edge of the crankshaft signal When disabled the camshaft signal is unaltered When CamOffset is zero offset cam signal will remain low CamOffset Teeth The number of crank signal pulses to offset the cam signal CrankFiltTime usec Number of microseconds that an incoming crank signal needs to be longer then before it will not be considered a glitch CamFiltTime usec Number of microseconds that an incoming cam signal needs to be longer then before it will not be consi
9. Driver System a pull up resistor must be connected between a constant voltage source such as DV or battery and each of the digital input a pins of the NI 9411 module as described above Then the port fuel injector or ignition output pin of the engine controller must be connected to the a pin of the digital input channel to be commanded The pull up resistors act as a low current load to the fuel injector or ignition outputs of the engine controller This physical arrangement provides for an active low injection command because the engine controller s low side drivers will pull the digital inputs of the NI 9411 module low when injection events are desired This configuration requires the DIX_TriggerPolarity Boolean on the Module Control tab to be set to ACTIVE LOW see Using the Calibration Interface on page 23 Since most engine controllers have diagnostic features to detect fault conditions with the fuel injector or ignition loads and pull up resistors are not inductive loads the engine controller may report open circuit faults Those should be ignored Figure 7 below illustrates this configuration 5V or BATT External Engine Controller 1K gt NI 9411 a pin Port Fuel Injector Command Active Low Configuration Figure 7 Connecting an Engine Controller Port Fuel Injector Output to the SADI Driver System If general purpose TTL commands are used from an external controller then the TTL commands may be directly
10. Module 1 NI 9215 VV VVVV 9 Channel SADI Driver System SADIQ 1 cRIO 9012 RT Controller 1 CRIO 9112 8 Slot FPGA Chassis 3 Drivven DI Driver Modules 2 CRIO 9411 Digital Input Modules 1 Low Side Driver Module 1 NI 9215 VV VV VW 12 Channel SADI Driver System SADI12 1 cRIO 9012 RT Controller 1 CRIO 9112 8 Slot FPGA Chassis 4 Drivven DI Driver Modules 2 CRIO 9411 Digital Input Modules 1 Low Side Driver Module 1 NI 9215 VVVVVV Each SADI Driver System is delivered with an installed startup executable application which begins executing about 20 seconds after the cRIO controller is powered up Drivven s CalVIEW is used as a calibration user interface to the system The calibration settings are stored on the RT controller and are loaded immediately upon system boot The user interface is accessed by running the CalVIEW console software on a Windows PC communicating with the RT controller over Ethernet LabVIEW development tools are NOT required but the free LabVIEW Run time Engine is required to be installed on the Windows PC to support CalVIEW Each SADI Driver System is provided with a CalVIEW Console license The CalVIEW user interface is not required for normal driver operation The system will run according to the previously saved calibration No other products from National Instruments or Drivven are required for this system to operate Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 5 Drivven Inc
11. SADI Driver System If the user sends Drivven an injector ahead of time Drivven will calibrate the current profile so that the user can run right out of the box for no additional charge It should also be noted that similar systems can also be custom configured for port fuel injectors using Drivven PFI Driver modules CalVIEW and the Direct Injector Driver modules have separate user manuals for their individual use The information in this SADI Driver System manual may overlap in some areas but please refer to the other product s documentation for product specific information The hardware system configurations available are shown below in Figure 1 and Figure 2 Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 6 Drivven Inc SADI Driver System System Configurations 12 Channel System 9 Channel System 6 Channel System 3 Channel System 4 Ae Figure 1 Base SADI Driver System Configurations Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 7 Drivven Inc SADI Driver System 12 Channel System 9 Channel System 6 Channel System 3 Channel System Figure 2 Advanced SADI Driver System Configurations with Rail Pressure Control Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 8 Drivven Inc SADI Driver System NI 9411 Digital Input Module Pinout The pinout for the connectors of the NI 9411 module is shown below in Tables 1 and 2 Table
12. There are several other features of CalVIEW that are not discussed here such as saving a CalVIEW settings file for quickly starting the host user interface Those features are discussed in detail within the CalVIEW user manual which is installed to your Windows Start menu under Programs gt Drivven gt CalVIEW Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 21 Drivven Inc SADI Driver System Changing the IP Address If the customer needs to change the TCP IP settings for the cRIO 9012 controller then an additional software component from National Instruments must be installed It is the NI RIO driver The properly configured software search from the National Instruments website is shown below in Figure 11 Select and install the latest version available NERIO vseen Help View as List View as Table 1 10 of 40 Show 10 20 30 results per page 1234 Next D Product Download Operating System Release Software Download Version Date Language NI RIO 321 Real Time 05 Windows 2009 August English Japanese NI RIO 3 4 Real Time 0S Windows 2010 February Japanese English NI RIO Fa Pt Real Time OS Windows 2009 April English 2009 NI RIO 3 3 1 Real Time OS Windows English Japanese December Figure 11 Searching for the NI RIO Driver When installing NI RIO accept all of the default components to install After installing NI RIO you will be able to run the National Instruments program called Measurement and Automati
13. an existing network be sure that the Gateway and DNS fields are entered correctly or CalVIEW will still have difficulty It may be best to leave the DNS field empty at all times unless required for a specific reason Note The IP address of the host computer must be on the same subnet as the cRIO 9012 controller in order to find the system within MAX except for the case where the cRIO 9012 controller IP address is reset to 0 0 0 0 Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 22 Drivven Inc SADI Driver System Using the Calibration Interface P Stand Alone Direct Injector Driver System File Edit View Project Operate Tools Window Help DRIVVEN typpi pieco DI1 Module Control DI2 Module Control DIS Module Control DI4 Module Control DU Piezo Profiler DI2 Piezo Profiler DI3 Piezo Profiler DI4 Piezo Profiler Exec DI1_ModulePresent DI1_HVTarget DI1_ChaniEnable DI1_PSChargeFault DI1_Fl10penCircuit O OFF NO FAULT NO FAULT DI1_ModuleEnable DI1_PeakCurrent DI1_Chan2Enable DI1_PSOverloadFault DI1_FI20penCircuit or 0 A OFF NOF AULT No FAULT P DI1_PowerSupplyEnable DI1_HoldCurrent DI1_Chan3Enable DI1_ShortCircuitFault DI1_FI30penCircuit 0 A Si mc NO FAULT NO FAULT d d ak lime EE DI1_Command1 DI1 ModuleTempFault DI1 HighVoltageLimitFault 0 msec OFF DI1_BackBoostTime NO FAULT NO FAULT DI1 PiezoEnabl _PiezoEnable E DIL _Command2 D HighVoltageDriverFault D
14. connected to the a pins of the NI 9411 module Trigger polarity should be set according to the controller output polarity Pull up or pull down resistors should be used on each a pin for further robustness in case commands are accidentally disconnected Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 16 Drivven Inc SADI Driver System DB 15 Connector Parts Table 4 below is a list of the connector parts included with the SADI Driver System to connect external digital commands to the NI 9411 modules The crimper tool and pin positioner are available from major electronics distributors Allied Electronics Mouser Digi Key etc but are not included with the SADI Driver System Table 5 Connector Parts List Description AMP HDP 20 Series 109 15P Receptacle Housing 205163 1 AMP HDP 20 Series 109 Crimp Socket Contact 205090 1 Norcomp D Sub Connector Hood 15P 45 Degree 971 015 020R121 AMP D Sub Insert Extract Tool 91067 2 Paladin Tools Crimper 26 20 AWG PA 1460 Table 6 NI 9411 Module Pigtail Description Pin Description Ping Wire Color Dla Brown DIY Brown Supply 5VOut 4 Pe D Green Da IB Pupe The b pins of the NI 9411 should not be connected unless you are using complimentary digital inputs Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 17 Drivven Inc SADI Driver System Connections for Rail Pressure Control This section
15. explains how to connect the Low Side Driver and NI 9215 with an advanced add on software package Table 7 Low Side Driver and NI 9215 Connections for Rail Pressure Control Pin Description Pin Connected To 81 1 LS Low Side Driver channel Al NI 9215 channel IMV Inlet Metering Valve typically found on the fuel pump HPV High Pressure Valve typically found on the common rail not always present Figure 8 below is a graphical representation of the connections between the modules and the sensor and actuators required for rail pressure control For more information about connecting to the Low Side Driver refer to its manual Battery voltage needs to be measured in order for the Low Side Driver to be able to control the IMV and HPV correctly Battery voltage is measured by the DI driver so the power supply for the DI driver and the high side of IMV and HPV needs to be the same power supply The battery voltage measurement is used to limit the maximum duty cycle of the IMV and HPV so that the current does not exceed the capabilities of the channels they are connected to The voltage of the power supply for the SADI is not read through the NI 9215 because it is limited to reading 10volts W Rail Pressure Sensor SADI TTL Trigger Source Figure 8 Advanced SADI Driver Connected to Control Rail Pressure Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 18 Drivven Inc SADI Driver System Using the S
16. loop PID algorithm The user may tune the PID gains to suit the requirements of their system Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 4 Drivven Inc SADI Driver System Triggered Multi Pulse TMP This features uses the rising or falling edge of the external digital command as a trigger for a multi pulse injection sequence for up to five pulses per trigger The user may define the delay and duration for each of five injection pulses This is useful for adding multi pulse injection capabilities to a system that only allows one output trigger per cycle Injector Calibration This feature allows the user to command a programmable number of injections at a fixed duration and interval This is helpful for measuring the mass of fuel injected per injection event In order to use the rail pressure control of the Advanced Add on Package a Low Side Driver and NI 9215 must be purchased in addition to the advanced add on software package The different channel count SADI Driver Systems with rail pressure control capabilities include the following 3 Channel SADI Driver System SADI3 1 cRIO 9012 RT Controller 1 CRIO 9111 4 Slot FPGA Chassis 1 Drivven DI Driver Module 1 CRIO 9411 Digital Input Module 1 Low Side Driver Module 1 NI 9215 VVVVVV 6 Channel SADI Driver System SADI6 1 cRIO 9012 RT Controller 1 cRIO 9112 8 Slot FPGA Chassis 2 Drivven DI Driver Modules 1 cRIO 9411 Digital Input Module 1 Low Side Driver
17. start time of the pre pulse with respect to the start of the main pulse This is a time advance not a position advance PreAdvance is entered as a time with units of milliseconds PreAdvance is limited to a value of about 5 msec PreDuration_DI msec Determines the length of the pre fuel pulse PreDuration is entered as a time with units of milliseconds PreDuration is is limited to a value of 5 msec in order to protect the DI driver module MainDuration_DI msec Determines the length of the main fuel pulse MainDuration is entered as a time with units of milliseconds MainDuration is limited to a value of 5 msec in order to protect the DI driver module AfterDelay_DI msec Determines the start time of the after pulse with respect to the end of the main pulse This is a time delay not a position delay AfterDelay is entered as a time with units of milliseconds AfterDelay is limited to a value of about 5 msec AfterDuration_DI msec Determines the length of the after fuel pulse AfterDuration is entered as a time with units of milliseconds AfterDuration is limited to a value of 5 msec in order to protect the DI driver module PostDelay_DI msec Determines the start time of the post pulse with respect to the end of the after pulse This is a time delay not a position delay PostDelay is entered as a time with units of milliseconds PostDelay is limited to a value of about 5 msec PostDuration_DI msec Determines the length of the post f
18. such as Delphi DFI 1 X injectors All piezo actuated injectors require series inductance as well Drivven can provide such inductors to the customer when shipping the system if the customer informs Drivven of the type of injector to be used These inductors have leads attached which can be soldered in series with the injector leads It does not matter which lead of the injector with which they are placed in series Figure 6 below shows the inductor and part number which Drivven supplies if needed Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 13 Drivven Inc SADI Driver System Battery or Power Supply 12 24V Typical 50W Fe el Automotive 10A Fuse BATT Q INJ1 1 INJ1 2 INJ2 INJ2 4 INJ3 5 INJ3 6 EXT PWR 7 GND 8 Short Ch 3 GND 9 DI Module Connector Figure 6 Connecting Piezo Injectors to the DI Driver Module In series inductance and shorting channel 3 is mandatory for piezo mode operation only If you are interested in purchasing the same inductors that we use the part number is PCR0830 250M H These inductors can be ordered directly from Coilws com More information on connecting injectors to the DI module can be found in the DI driver manual available at http drivven com Documentation htm Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 14 Drivven Inc SADI Driver System Connecting Digital Commands Each NI 9411 digital input module has six
19. the cam tooth was not received when expected This condition causes a loss of sync Re sync is not allowed until the flag is cleared by setting SyncFlagClear to TRUE In most encoder pattern scenarios CamSig is actually the Z pulse of an ABZ encoder Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 39 Drivven Inc Rail Pressure Control Tab F Stand Alone Direct Injec File Edit View Project Operate Tools Wi w Help SADI Driver System Seen Stand Alone Direct Injector DRI EN Driver System with EPT TMP Calibration Command and Rail Pressure Control DI1 Module Control EPT Mode Setup DI1 Piezo Profiler Rail Pressure CalScopes Exec IMVEnable IMV_ManualOverride SE HPV_ManualOverride RailP_FaultClear Ls ModulePresent RailPTable OFF OFF OFF OFF or BattV 0 0 OFF d IMV_amps e HPV_amps EES Ra lPFault RallPGriticalFault Fe am com 0 0 0 0 FAULT NO IMV_Kc HPV Kc _NO FAULT 0 A d J T IMV_LS OpenFault RailP b y IMV Ti HPV Ti FuelPControlMode _NO FAULT 0 do i T da IMV_LS_ShortFault IMV_Td HPV_Td RailPSetpoint Jorn Geng EnableRailPFilt 70 Jo 0 bar EE OFF IMVPIDMax HPVPIDMax NO FAULT RailPFilterBreak InitRailPFilt Jo SP il HPV_LS_ShortFault o Hz OFF IMVPIDMin HPVPIDMin IS RailPSim SimRailP 20 Jo fl RailPCFThresh 0 ber OFF Gate IMVNonPIDFF HPVPIDFF HPVNon
20. 1 NI 9411 DB 15 Connector Pinout Module DSUB Pins Dila DI2 Oo O in P oF MD Za d 2 EN bel ki EN e 5 e bi Zeck A St fl ec A Table 2 NI 9411 Power Screw Terminal Pinout Screw Terminal Pins BATT Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 9 Drivven Inc DI Driver Module Pinout INJ1 INJ1 INJ2 zs NJ2 ome INJS zs INJS EXT PWR GND GND 2 3 4 5 6 Li 8 g Figure 3 DI Driver Module Screw Terminal Pinout Drivven Inc 2009 e SADI Driver System Users Manual D00010X SADI Driver System Drivven Inc SADI Driver System t Power PP Ek FPGA it TAGGER i H LT HL sd g ZU MA SAFE MODE CONSOLE Ou IP RESET NO APP USERI fi AESET Jeer Ieai fan A DO NOT SEPARATE CABLES WE ENERGIZED IN HAZARDOUS LOC LINK k ACTIVITY NI cRIO 901x TompaecthlO Real Time Controller Tk LE Ds Reset Button SME Connector RJ 45 Ethernet Port Power Connector USB Port DIP Switches AS 232 Serial Port Figure 4 cRIO 9012 Controller Pinout Powering the System Warning The external battery supply input terminals on the Drivven DI Driver Module are not reverse voltage polarity protected Connecting power to the module in reverse polarity will damage the module This event is not covered by the warranty Please refer to the DrivvenRe
21. ADI Driver System The SADI Driver System is delivered with an installed executable which is marked to begin execution when the system boots The power and boot sequence takes approximately 20 seconds When the SADI Driver System application is running the User LED on the cRIO 9012 controller will begin blinking at a rate of approximately 4 Hz If the application detects a critical fault such as a short circuit the system will prevent any further injection events and shutdown the internal boost power supplies A non critical fault such as an open circuit will clear itself when the condition is removed Any present fault condition is signaled by a steady ON User LED on the cRIO 9012 controller Critical fault conditions can be cleared by cycling power to the entire system or by connecting to the calibration interface and manually clearing the fault The SADI Driver System is delivered to customers with a calibration such that the individual DI Driver modules are not enabled when the system powers up Therefore the customer must connect to the calibration interface to enable the modules make injection current profile modifications if necessary and save the calibration before the system may be used stand alone in the field After calibrations are saved those calibrations will be loaded and used each time the system powers up For example if the user wants DI Driver modules 1 and 2 to be enabled upon power up but modules 3 and 4 to be disabled then
22. DRIVVEN Stand Alone Direct Injector Driver System User s Manual D000103 3 Channel D000100 6 Channel D000101 9 Channel D000102 12 Channel October 2010 Drivven Inc 12001 Network Blvd e Ste 110 San Antonio Texas 78249 USA Phone 210 248 9308 Web www drivven com E mail info drivven com Drivven Inc SADI Driver System DANGER HIGH VOLTAGE HIGH VOLTAGE This device normally operates at voltages up to 150 volts Extreme care should be taken to protect against shock Even when the device is completely powered down allow approximately three minutes for the internal high voltage to dissipate Do not touch any of the module screw terminals or injector terminals while the device is powered Drivven Inc 2009 e SADI Driver System User s Manual DO0010X 2 Drivven Inc SADI Driver System Table of Contents Je ge le tee EE 4 OS GOMMGULATIONS RSR a Gees atone NN ame auc een 7 NI 9411 Digital Input Module PinOUut 2iccs cc0 ete ee el He 9 BI Driver MOGUICHP ee EE 10 POWSNNG ING SYVSICM netsh tic a a oe el Ge es 11 GONMECIING dE 13 Connecting Digital Commands EE 15 DES COMMECION PANS EE 17 Gonnections for Rail Pressure Control eegen eege Eege 18 Using the SABI Driver SYSteM EE 19 Connecting to the System Calibration Interface 19 Ghanging Beeler 22 Using the Calibration le e Let EE 23 Advanced Add On Package Description EEN 29 Table of Figures and Tables Figure 1 Base SADI Driver System Cont
23. I1_LowVoltageDriverFault DI1 PeakTime NO FAULT NO FAULT DI1_OneShotEnable x e Dit Commands DI 1 OffTi me e Injector Current S DI 1 Sco pe Power Supply Oo eH KA 9 9 z in bg O cr 0 msec DI1_ModuleTemperature 0 C DIi_InternalHighVoltage DI1_CalComplete 0 y OFF DI1_CalibrateNow OFF DI1_ExternalHighVoltage DI1_ClearFaults 0 y OFF DI1_BatteryVoltage DI1_TriggerPolarity 0 00 V ACTIVE HIGH DI1_TriggerFilter 0 usec Current 4 F A aBeyos 0 1 1 1 H 1 1 CH 0 000 D 500 i i E 500 3 000 i 4 500 E 000 Time msec Figure 12 Calibration Interface Screen Shot DIX Module Control Tab see Figure 1 DIX_ModuleEnable Boolean If a DI driver module is inserted in the proper slot externally powered and DIX_ModuleEnable is TRUE then the controller begins communicating with the module and allows the module to operate When the module is properly recognized then the DIX_ModulePresent Boolean will be set to TRUE Also after a few seconds the DIX_CalComplete Boolean will be set to TRUE DIX_PowerSupplyEnable Boolean When TRUE the module internal boost power supply is enabled and will maintain the working voltage specified by DIX_HVTarget When FALSE the module internal boost power supply is disabled DIX_InjectionEnable Boolean When TRUE the module injection control circuitry is enabled When FALSE the module injection control circuitry is disabled This parameter does not gener
24. Inputs to DI Driver Channels 13 Table 4 Routing of NI 9411 Digital Inputs to DI Driver Channels 15 Table 5 Connector Pants EE 17 Table 6 NI 9411 Module Pigtail Description 17 Table 7 Low Side Driver and NI 9215 Connections for Rail Pressure Control 18 Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 3 Drivven Inc SADI Driver System Introduction The Drivven CompactRIO cRIO DI Driver Module Kits are intended to be used within a full authority engine control system where the cRIO controller or PXI controller are performing the engine control algorithms However some customers have requested a stand alone driver system which allows them to use another external controller to generate digital fuel control signals to interface to our DI Driver Modules Drivven now offers a family of Stand Alone Direct Injector SADI Driver Systems that enable this configuration Drivven offers four different base SADI Driver Systems which provide three six nine and twelve driver channels for solenoid injectors When used with piezo injectors each system provides two four six and eight driver channels respectively These base systems provide a digital input per channel for directly commanding each injector Each base system includes the following hardware 3 Channel SADI Driver System SADI3 gt 1cRIO 9012 RT Controller gt 1cRIO 9111 4 Slot FPGA Chassis gt 1 Drivven DI Driver Module gt 1cRIO 9411 Digital Inout Module
25. PIDFF 0 bar o go Jo g Ho 0 RailP Setpoint S raip BS imv oc EME HPV oc MMM Faut Thresholi PME IMV_DCMax HPV_DCMax SE ES 0 0 1800 90 IMV_DCMin HPV_DCMin v i km J 0 J 0 1400 70 IMV_DutyCycle HPV_DutyCycle ye 60 5 0 767 0 767 2 1000 50 S IMV_PID HPV_PID g 0 p o p IMVNomResistance HPVNomResistance do do IMVFreq HPVFreq 0 Lo d 5 105 Jo g Jo g Time EFOR Figure 19 Rail Pressure Tab User Interface IMVEnable Boolean Enables or disables the Low Side Driver channels responsible for controlling the IMV IMV_ManualOverride Boolean Bypasses the PID control loop and sets the Low Side driver PWM output at a fixed Duty cycle defined by IMV ManualDC IMV_amps Amps An estimate of the current flowing through the IMV based on the duty cycle battery voltage and the nominal resistance of the valve This value is used to calculate IMV_DCMax which is the maximum duty cycle allowed through the IMV to protect the Low Side driver IMV_Kc Proportional gain for the IMV PID controller when FuelPControlMode is in IMV PID Mode When FuelPControlMode is in HPV PID Mode this proportional gain is set to zero and the duty cycle is set only by IMVNonPIDFF IMV_Ti loop time Integral time constant for the IMV PID controller IMV_Td loop time Derivative time constant for the IMV PID controller Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 40 Drivven Inc SADI Driver System IMVPIDMa
26. PVEnable Boolean Enables or disables the Low Side Driver channels responsible for controlling the HPV HPV_ManualOverride Boolean Bypasses the PID control loop and sets the Low Side driver PWM output at a fixed Duty cycle defined by HPV_ManualDC HPV_amps Amps An estimate of the current flowing through the HPV based on the duty cycle battery voltage and the nominal resistance of the valve This value is used to calculate HPV_DCMax which is the maximum duty cycle allowed through the HPV to protect the Low Side driver HPV_Kc Proportional gain for the HPV PID controller when FuelPControlMode is in HPV PID Mode When FuelPControlMode is in HPV PID Mode this proportional gain is set to zero and the duty cycle is set only by HPVNonPIDFF HPV_Ti loop time Integral time constant for the HPV PID controller HPV_Td loop time Derivative time constant for the HPV PID controller HPVPIDMax Maximum duty cycle allowed from the HPV PID controller output without feedforward HPVPIDMin Minimum duty cycle allowed from the HPV PID controller output without feedforward Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 41 Drivven Inc SADI Driver System HPVPIDFF Feed forward duty cycle added to the PID controller duty cycle output when FuelPControlMode is in HPV PID Mode HPVNonPIDFF Feed forward duty cycle added to the PID controller duty cycle output when FuelPControlMode is in IMV PID Mode HPV_DCMax
27. Simplified LabVIEW Run Time Engine 64 bit Windows 7 x64 Server p Minimum RTE 2009 5P1 2008 xB4sVista x64 2010 February English French German Japanese Korean LabVIEW Run Time Engine 32 bit VORP eS enue SE Standard RTE 2009 5P1 x64 Server 2003 Server 2010 February English French German A 2008 x64Vistaivista x8 4 XP Japanese Korean gt Pe e Chinese Simplified LabVIEW Run Time Engine 64 bit Windows 7 x64 Server S Standard RTE 2009 SP1 2008 x64 Vista x64 2010 February English French German Japanese Korean X o Windows 2000717 Chinese Simplified eee Se 2 Engine 20 2009 SP1 x64Server 2003 Server 2010 February English French German 2008 x64 Vistaivista x8 NXP Japanese Korean Figure 9 Searching for the LabVIEW Run time Engine Go to Drivven s website and download and install the latest version of CalVIEW at http www drivven com visitor download Software CalVIEW2 90 zip Please follow the instructions in the CalVIEW user manual for properly activating CalVIEW on your computer Connect the cRIO 9012 controller to an Ethernet network using the RJ 45 Ethernet port on the controller Use a Category 5 CAT 5 Ethernet cable to connect the controller to an Ethernet hub or directly to a computer When connecting the cRIO controller directly to your host computer without any hubs or switches in between your computer must be on the same IP subnet as the CRIO controller in order for communication to take plac
28. a value of 5 msec MainOffset_TMP msec Sets the delay between the start of the pilot pulse and the main pulse On the RT controller all of the TMP offset values are limited to 10 seconds for safety considerations MainDuration_TMP msec Determines the length of the main fuel pulse MainDuration is entered as a time with units of milliseconds MainDuration is limited to a value of 5 msec AfterOffset_TMP msec Sets the delay between the start of the pilot pulse and the after pulse On the RT controller all of the TMP offset values are limited to 10 seconds for safety considerations AfterDuration TMP msec Determines the length of the after fuel pulse AfterDuration is entered as a time with units of milliseconds AfterDuration is limited to a value of 5 msec PostOffset_TMP msec Sets the delay between the start of the pilot pulse and the post pulse On the RT controller all of the TMP offset values are limited to 10 seconds for safety considerations Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 33 Drivven Inc SADI Driver System PostDuration_TMP msec Determines the length of the post fuel pulse PostDuration is entered as a time with units of milliseconds PostDuration is limited to a value of 5 msec TMP_ChanXEnable msec Enables channel X of the DI driver s to output the TMP pulse train when TMP mode has been selected Direct Mode DIR_Trigger_Delay msec Delay in milliseconds between the incoming tri
29. ace connection Then press the green RUN button at the top of the CalVIEW console to start the user interface The user interface will look similar to the panel shown in Figure 10 Figure 10 shows a calibration interface for a 12 channel SADI Driver System Systems with fewer channels will have fewer tabs Note The IP address of the host computer must be on the same subnet as the cRIO 9012 Drivven Inc 2009 e SADI Driver System Users Manual D00010X 20 Drivven Inc SADI Driver System controller in order to connect to the calibration interface gt Stand Alone Direct Injector Driver System File Edit View Project Operate Tools Window Help DRIVVEN 2 DI1 Module Control DI2 Module Control DI3 Module Control DI4 Module Control DI1 Piezo Profiler D12 Piezo Profiler DI3 Piezo Profiler D14 Piezo Profiler Exec DI1_ModulePresent DI1_HVTarget DI1 Chan1Enable DI1 PSChargeFault DI1 FI10penCircuit 0 OFF NO FAULT NO FAULT DI1_ModuleEnable DI1_PeakCurrent DI1_Chan2Enable DI1_PSOverloadFault DI1_FI20penCircuit ae a NO FAULT NO FAULT DIi_PowerSupplyEnable DIt_HoliCurrent DI1_Chan3Enable DI1_ShortCircuitFault DI1_FI30penCircuit OFF 0 A OFF N LT VOF LT Lech DIL HVPeakTime EE DI1_Command1 DI1 ModuleTempFault DI1 HighVoltageLimitFault 0 msec OFF DI1_PiezoEnable DI1_BackBoostTime S NO FAULT NO FAULT 0 msec DH Commandz DI HighVoltageDriverFault DI1_LowVoltageDriverFault DI P
30. adjusted manually at individual points DIX_PzinputMultiplier SGL Scales the input to the sine function effectively adjusting the period of the sine wave Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 26 Drivven Inc SADI Driver System DIX_PzinputAdder SGL Offsets the input to the sine function effectively shifting the sine wave horizontally DIX_PzOutputMultiplier SGL Scales the output of the sine function effectively adjusting the amplitude of the sine wave DIX_PzOutputAdder SGL Offsets the output of the sine function effectively shifting the sine wave vertically DIX_PzProfCursorMode Boolean When in DRAG mode allows the user to drag the cursor to profile locations for setting new manual duty cycle values When in CONTROL mode allows the user to set the manual profile position using DIX_PzProfldx DIX_PzProfldx SGL When in CONTROL mode sets the manual profile position for editing DIX_PzProfldxSet 132 Sets the manual duty cycle for the profile location specified by DIX_PzProfldx DIX_WorkingProfileSelect U8 Selects the local ON or OFF profile to work with DIX_Copy U8 Selects the local ON or OFF profile to copy to the other selected profile in DIX_To This copy procedure is only happening on the local computer not on the target DIX_To U8 Selects the local ON or OFF profile to be copied from the other selected profile in DIX_Copy This copy procedure is only happen
31. ate any fuel pulses It only enables the driver circuitry to operate when fuel commands are generated Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 23 Drivven Inc SADI Driver System DIX_CalibrateNow Boolean When this button is pressed the DI Driver module will be calibrated with HVTarget PeakCurrent HoldCurrent HVPeakTime BackBoostTime PeakTime OffTime and various piezo settings The DIX _CalComplete output Boolean will be FALSE during calibration and will be set TRUE when calibration is complete The calibration procedure is automatically performed when modules are enabled and also when the system is powered up Whenever a DI Driver module parameter listed above is changed then the CalibrateNow button must be pressed in order to see its effect on injection current profiles DIX_ClearFaults Boolean When this one shot is pressed all critical faults of the DI Driver module will be cleared DIX_HVTarget V The working voltage set point of the internal boost power supply DIX_PeakCurrent A This is the current level which will be targeted by the injector driver circuit during the HVPeakTime msec period However the high voltage portion of the current profile is primarily based on HVPeakTime msec PeakCurrent A is only a backup during the high voltage phase since current is not sensed fast enough to be effective This value should be set to the peak current level obtained from the OEM injector operation
32. ave to be purchased The required modules for rail pressure control are the Drivven Low Side Driver and the NI 9215 The assigned module slots of the SADI Driver System with an Advanced Add on Package capable of controlling rail pressure can be seen in Figure 2 Advanced Software Package Drivven also offers an Advanced Software Package with each system which includes the following additional features Engine Position Tracking EPT This feature takes cam and crank signals as inputs and tracks the crankshaft angle for two stroke or four stroke engine cycles The crank and cam signals can be from an optical encoder camshaft or from production crank and cam position sensors VR sensors require additional hardware The EPT feature allows the user to enter start of injection angles and durations for injection events Up to five pulses per cycle are possible Rail Pressure Control With the addition of a Drivven Low Side Driver and an NI 9215 common rail fuel pressure can be controlled The software uses the NI 9215 to measure the rail pressure while using the Low Side Driver to PWM the Inlet Metering Valve IMV and the High Pressure Valve HPV on the rail with a closed loop PID algorithm Users are allowed to select between different rail pressure control strategies to suit the needs of their system The recommended setup though is to control the IMV with a PID loop and fix the HPV at a constant duty cycle The user needs to tune the PID gains to suit t
33. d DI1 Module Control EPT Mode Setup DI1 Piezo Profiler Rail Pressure Exec FPGAError MainLoopExecTime 00 000 mesic MainLoopPeriod 00 000 msec IP Address CalFile Name CPU_Use 00 000 Figure 14 User Interface of Execution Tab FPGAError Boolean Indicates a fault with loading the FPGA portion of the application to the CRIO FPGA chassis This error should never happen and is only an internal development diagnostic MainLoopExecTime msec Indicates the amount of time required to execute the main control loop on the cRIO target MainLoopPeriod msec Indicates the actual period measured for the main control loop on the CRIO target Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 28 Drivven Inc SADI Driver System Advanced Add On Package Description SADI Driver systems can be customized to meet the needs of different projects The most commonly requested advanced features have been combined into an Advanced Add on Package Contact Drivven for a quote for further customization The Advanced Add on Package includes Engine Position Tracking EPT rail pressure control Triggered Multi Pulse TMP and injector calibration mode It should be noted that the Advanced Add On package allows for longer injection delays than the base SADI Driver s direct command mode In order to utilize the rail pressure control software included with the Advanced Add on Package two additional cRIO modules h
34. dered a glitch GlobalTDCOffset CA Crank angle degrees between the absolute zero position determine by the EPT function and TDC1 When TDC1 is before absolute zero position then GlobalTDCOffset is negative When TDC1 is after absolute zero position then Global DCOffset is positive The absolute zero position is specific to the crankshaft pattern type For encoder pattern types assuming an ABZ style encoder absolute zero position is the rising edge of the first A B pulse following the rising edge of the Z pulse while the cam signal is TRUE For N M pattern types absolute zero position is the rising edge of the first crank pulse following the M tooth gap while the cam signal is TRUE For N 1 pattern types absolute zero position is the rising edge of the first crank pulse following the 1 pulse while the cam signal is TRUE TDCX CA Crank angle degrees of offset between the TDC1 and TDCX X represents the channel number for the DI module and not necessarily the cylinder number The channels within a single DI Driver module are multiplexed Therefore a crank angle position must be set which determines when the software switches operation to the next channel DICutoff is used for this purpose One DICutoff value is applied to each channel TDC with units of Degrees Before TDC DBTDC Even though some channels may not be used or enabled each channel s TDC must be in positional order as channel number increases Below are some example TDC val
35. digital inputs Each SADI Driver System always contains an NI 9411 module in slot one Each NI 9411 module commands DI Driver modules in the next two slots The first three input channels of an NI 9411 module command the DI Driver module in the next adjacent slot The last three input channels of the NI 9411 module command the DI Driver in the second adjacent slot Refer to Table 3for the routing of digital input channels to DI Driver channels The table applies to 3 6 9 and 12 channel systems For systems operating piezo injectors the third channel of each DI Driver module is not used and must be shorted across INJ3 and INJ3 terminals Table 4 Routing of NI 9411 Digital Inputs to DI Driver Channels NI 9411 Digital Input Channel Reference NI 9411 1 Channel 0 DI Driver 1 Channel 1 NI 9411 1 Channel 1 DI Driver 1 Channel 2 wann DiDrver2Chamela 6 wanz eng 01DrveraGhamel2 e wanzeng DIDrvers Ghamels o The COM pin 12 of each NI 9411 module should be connected to the external commanding system ground The b pins of the NI 9411 digital input channels must be left disconnected floating unless used as a differential input channel with RS485 compatible or complimentary outputs lt is good practice to use external 1K pull up or pull down resistors on each digital input command line in case the commands are unintentionally disconnected For active high commands the inputs should be pulled low with the resistor co
36. e For example if the cRIO controller IP address is 192 168 0 131 then your host computer must have an IP address of 192 168 0 X where X is anything between 1 and 255 but not the same as the cRIO controller This can be done by configuring your computer TCP IP settings manually and setting a fixed IP address The netmask should be set to 255 255 255 0 The DNS and Gateway IP addresses should be left blank It is possible to put the cRIO controller on a network and configure the cRIO controller for DHCP mode so that it will acquire TCP IP settings from your network router In order to reconfigure the CRIO controller TCP IP settings please refer to the following section titled Changing the IP Address The cRIO 9012 controller target must be powered and the user LED on the front must be blinking in order for a connection to be made with CalVIEW Open CalVIEW on the host computer right click inside the target item list and select Set New Target Address If the cRIO 9012 controller and your computer are on the same subnet default 192 168 0 X then CalVIEW will locate the SADI Driver System on the network automatically The pop up CalVIEW dialog box should also locate a host VI and a CalVIEW paring on the cRIO controller Press the button to tell CalVIEW to download these files and press OK CalVIEW will take a few seconds to transfer these files from the cRIO controller to your computer and use them to make the proper user interf
37. e gap then tooth number will start from 0 If the cam signal is FALSE during the gap then tooth count will start from mid cycle When AllowNoCamStart is FALSE and Stroke is TRUE sync will only be started when the crank feature is found while the cam signal is true therefore only starting tooth count from 0 Only set this input to TRUE if it is OK to be in sync 360 degrees out of phase in the case of a disconnected or faulty cam sensor This parameter is only available for N M and N 1 pattern types MissedPlus1Flag Boolean Set to TRUE upon CrankCount being incremented past the expected value for the location of a Plus1 tooth before the Plus1 tooth is detected In other words evenly spaced teeth are received at the location where a Plus1 tooth is expected This condition causes a loss of sync Re sync is not allowed until the flag is cleared by setting SyncFlagClear to TRUE NoCamFlag Boolean Set to TRUE upon detecting 2 consecutive 1 teeth without detecting a TRUE CamSig Stroke TRUE CamSig is only sampled at 1 tooth detection This condition does not cause a loss of sync NoCamFlag is cleared by setting SyncFlagClear to TRUE Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 38 Drivven Inc SADI Driver System Encoder Only MissedCamFlag Boolean Set to TRUE upon CrankCount being incremented past the expected value for the location of a CamSig rising edge before the CamSig rising edge is detected In other words
38. eakTime NO FAULT NO FAULT DI1_OneShotEnable wie DIL Command3 DI 1 OffTi me Injector Current PSV DI 1 Sco pe Power Supply OFF Oo eS KA O M Li Sg CO er d msec DI1_ModuleTemperature 0 C DI1_InternalHighVoltage DI1_CalComplete 0 y OFF DI1_CalibrateNow OFF DI1_ExternalHighVoltage DI1_ClearFaults 0 y OFF DI1 BatteryVoltage DI1_TriggerPolarity 0 00 V ACTIVE HIGH DI1_TriggerFilter 0 usec Current 4 A BBE yo Lina EN EE EE EE DE Ee 1 000 1 500 2 000 3 000 4 000 4 500 5 000 Time msec Figure 10 Calibration Interface Screen Shot The user may press the square red stop button on the CalVIEW console to stop the host user interface This will not stop the cRIO 9012 target application If the user desires to also stop the target application then the red Stop Target button should be pressed Other than being manually stopped Stop Target or powered down by the user the CalVIEW interface is always available to the user even during normal system operation in the field Viewing the calibration interface does not limit the performance of the system in any way The CalVIEW interface may be started and stopped any number of times while the target application is running When the user makes changes to the parameters through the user interface host VI they may be saved to the target by pressing the purple disk Save Calibration as Target Default button on the CalVIEW console
39. gger for any channel and the firing of the enabled channels The duration of the injection event is defined by the pulse width of the incoming trigger limited to 5 msec The maximum amount of delay has been set to 10 seconds for safety considerations DIR_ChanXEnable Boolean When True enables the output channel X to be triggered by digital pulses coming on that channel s designated input channel see Table 3 Calibration Mode CalSeqStart Boolean When true starts firing the number of pulses specified by CalSeqPulses CalSeqDuration msec Pulse width of each pulse during a calibration sequence CalSeqPeriod msec Time period between the rising edge of injection pulses in a calibration sequence CalSeqPulses Number of injection pulses in a calibration sequence CalSeqProgress Progress through the calibration sequence Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 34 Drivven Inc SADI Driver System EPT Tab Stand Alone Direct Injector Driver System File Edit Yiew Project Operate Tools Window Help Seu DRIVVEN z iten with EPT TMP and Calibration Command DI1 Module Control EPT Mode Setup DI1 Piezo Profiler Exec NumberOfCrankTeeth GlobalTDCOffset SyncEnable EngineSpeed CrankStalled 0 pulses 0 CAD 0 RPM NumberOfMissingTeeth TDC1 SyncFlagClear EngineStatus SyncStopped 0 pulses 0 CAD JA Stroke TDC2 EngineSimEnable MaxCAT 4 STROKE 0 CAD 0 CAT StallSpeed TDC3 SimulatedSpeed
40. guratons 7 Figure 2 Advanced SADI Driver System Configurations with Rail Pressure Control 8 Figure 3 DI Driver Module Screw Terminal Pinout ss 10 Figure 4 cRIO 9012 Controller Pinout ss 11 Figure 5 Use of Ferrules on Screw Terminal Connections ccccceeeeeeeeeeeeeeeeeeaeeeeeeesaeneeeeeeeas 12 Figure 6 Connecting Piezo Injectors to the DI Driver Module ccccccceeescesesseeeeeeeseseeeeeeeees 14 Figure 7 Connecting an Engine Controller Port Fuel Injector Output to the SADI Driver System 16 Figure 8 Advanced SADI Driver Connected to Control Rail Pressure sssssssssssssssssseeesrsrssren 18 Figure 9 Searching for the LabVIEW Run time Engme 20 Figure 10 Calibration Interface Screen Shot 21 Figure 11 Searching for the NI RIO Driver 22 Figure 12 Calibration Interface Screen Shot 23 Figure 13 User Interface of DI Piezo brofler 26 Figure 14 User Interface of Execution Tab ss 28 Figure 15 Mode Setup Tab User Interface ccann e a a E E 30 Figure 16 Fuel Pulse Timing Diagram for EPT mode 31 Figure 17 Fuel Pulse Timing Diagram for TMP mode n annnnnannnnnnennnnnsnnnnnnnnnnnneosnnnnnnsennrnenenenee 33 Figure 19 EPT Lab User ln En EE 35 Figure 19 Rail Pressure Tab User Interface 40 Table 1 NI 9411 DB 15 Connector EE iscsi vecchareceesavivecehe emmener being aie ei ecadlavieeeslelaress 9 Table 2 NI 9411 Power Screw Terminal Pinout Re 9 Table 3 Routing of NI 9411 Digital
41. he end of the main pulse DiCutoff CA DBTDC The channels within a single DI Driver module are multiplexed Therefore a crank angle position must be set which determines when the software switches operation to the next channel DICutoff is used for this purpose One DICutoff value is applied to each channel TDC with units of Degrees Before TDC DBTDC Even though some channels may not be used or enabled each channel s TDC must be in positional order as channel number increases Below are some example TDC values for each channel Example 1 Correct positional order is maintained TDC1 0 TDC2 240 TDC3 480 Example 2 Correct positional order is maintained TDC1 240 TDC2 480 TDC3 0 Example 3 Incorrect positional order is not maintained TDC1 0 TDC2 480 TDC3 240 PilotAdvance_DI msec Determines the start time of the pilot pulse with respect to the start of the main pulse This is a time advance not a position advance PilotAdvance is entered as a time with units of milliseconds On the RT controller this value is internally limited to about 5 msec Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 31 Drivven Inc SADI Driver System PilotDuration_DI msec Determines the length of the pilot fuel pulse PilotDuration is entered as a time with units of milliseconds PilotDuration is limited to a value of 5 msec in order to protect the DI driver module PreAdvance_DI msec Determines the
42. he requirements of their system Triggered Multi Pulse TMP This features uses the rising or falling edge of the external digital command as a trigger for a multi pulse injection sequence for up to five pulses per trigger The user may define the delay and duration for each of five injection pulses This is useful for adding multi pulse injection capabilities to a system that only allows one output trigger per cycle Injector Calibration This feature allows the user to command a programmable number of injections at a fixed duration and interval This is helpful for measuring the mass of fuel injected per injection event In order to use the rail pressure control of the Advanced Add on Package a Low Side Driver and NI 9215 must be purchased in addition to the advanced add on software package The different channel count SADI Driver Systems with rail pressure control capabilities include the following Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 29 Drivven Inc Mode Setup Tab Stand Alone Direct Injector Driver System File Edit Yiew Project Operate Tools Window Help bay DRIVVEN DI1 Module Control EPT Mode Setup DI1 Piezo Profiler Exec Mode Selection EPT Mode MainEnable1 OFF MainEnable2 OFF MainEnable3 OFF PilotEnable OFF PreEnable OFF AfterEnable OFF PostEnable OFF EPT Mode 0 DBTDC DICutoff 0 DBTDC PilotAdvance_DI 0 msec PilotDuration DI 0 msec PreAdvance_DI 0 m
43. id mode DIX CommandX Boolean These Boolean indicators show the high low level of the external command DIX_XXXXFault Boolean These Boolean indicators show various fault conditions with the DI Driver module See the DI Driver Module Kit manual for details DIX_ModuleTemperature C Indicates the internal DI Driver module temperature The shutdown fault threshold is 80 C DIX_InternalHighVoltage V Indicates the internal boost power supply voltage DIX_ExternalHighVoltage V Indicates the external high voltage supply level If the external high voltage supply pin is connected to a level greater than 6V then the internal boost power supply will automatically shut down and rely on external power Using an external high voltage supply is typically not necessary DIX_BatteryVoltage V Indicates the external battery voltage supply level This should be in the range of 9 32V The internal boost power supply will operate more efficiently and cooler if the battery voltage is in the range of 24 32V The load and power consumption of the module and internal power supply are dependent on the solenoid load and rate of injection events DIX_Scope A V The scope updates at the interval of approximately 2 seconds to show the latest current and voltage profile stored by the DI Driver module Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 25 Drivven Inc SADI Driver System DIX Piezo Profiler Tab DRIVVEN ien
44. ing on the local computer not on the target DIX_CopyProfileNow Boolean Copies the local profile selected in DIX_Copy to the profile selected in DIX_To This copy procedure is only happening on the local computer not on the target DIX_SendProfileToRT Boolean Sends the selected working profile to the cRIO RT target However it is not used by the DI Driver module until the CalibrateNow button is pressed Also this profile is not saved to the cRIO target calibration file for use at power up until the CalVIEW Console Save Default Calibration button is pressed For typical experimentation with piezo profiles the user will press the DIX_SendProfile TORT button followed by the CalibrateNow button When an acceptable profile is achieved the CalVIEW Console Save Default Calibration button should be pressed DIX_GetProfileFromRT Boolean Retrieves the default profile from the cRIO target for experimenting with the profile within the user interface This button should be pressed when first starting the user interface via CalVIEW to bring the profile into local memory DIX_PzProfGraph SGL Displays the local memory piezo profile selected in DIX_WorkingProfileSelect Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 27 Drivven Inc SADI Driver System Execution Tab gt Stand Alone Direct Injector Driver System Eile Edit View Project Operate Tools Window Help DRIVVEN gane with EPT TMP and Calibration Comman
45. measured by the DI driver RailP_Volts Volts Voltage measured from the rail pressure sensor RailP bar Rail pressure in units of bar RailPTable Volts Bar One dimensional table that defines the conversion between rail pressure sensor voltage and units of pressure X is the sensor voltage and Y is the units of pressure output EnableRailPFilt Boolean Enable filtering the incoming rail pressure sensor voltage RailPFilterBreak Hz Low cutoff frequency of a 2 order filter on rail pressure sensor voltage InitRailPFilt Boolean Set to TRUE to reinitialize the 2 order filter on rail pressure The filter should be reset when changing RailPFilterBreak SimRailP Boolean When TRUE simulates the rail pressure using the value in RailPSim This is useful for tuning rail pressure PID control gains RailPSim Boolean The rail pressure that is simulated when SimRailP is TRUE Drivven Inc 2009 SADI Driver System User s Manual D00010X 43
46. n travel having a resolution dependent on binary extrapolation level and the number of physical teeth per crankshaft rotation For example if using the N M EPT VI which has an extrapolation of 7 the number of CAT per crank tooth would be 217 128 and CurrentPosition would be evenly incremented by 128 CAT from one physical tooth to the next If a 60 2 pattern were used the maximum number of CAT per crankshaft rotation cycle would be 60 128 7680 If the engine was a 4 stroke the total number of CAT per engine cycle would be 2 60 128 15360 CrankCount The latest tooth count referenced to crank tooth 0 Tooth 0 is determined according to the pattern that is being tracked and is discussed within the pattern specific ERT documentation Also see the description for GlobalT DCOffset CrankCount is provided in terms of a complete engine cycle and is reported as if there were no missing or extra teeth in the pattern For example if PATTERN N M NumberOfCrankTeeth 60 and Stroke TRUE then CrankCount will range from 0 to 119 CrankStalled Boolean Set to TRUE when the engine speed is below stall speed SyncStopped Boolean Set to TRUE while position tracking is not taking place In other words no sync CamSig Boolean The digital input signal representing the camshaft trigger wheel pulse train CrankSig Boolean The digital input signal representing the crankshaft trigger wheel pulse train MissedCrankFlag Boolean Set to TRUE upon the de
47. nabled for channel X depending on the other four enabled Booleans When FALSE default all five fuel pulses are disabled PilotEnable Boolean When TRUE and MainEnableX is TRUE the pilot pulse is enabled for all channels When FALSE default the pilot pulse is disabled PreEnable Boolean When TRUE and MainEnableX is TRUE the pre pulse is enabled for all channels When FALSE default the pre pulse is disabled Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 30 Drivven Inc SADI Driver System AfterEnable Boolean When TRUE and MainEnableX is TRUE the after pulse is enabled for all channels When FALSE default the after pulse is disabled PostEnable Boolean When TRUE and MainEnableX is TRUE the post pulse is enabled for all channels When FALSE default the post pulse is disabled SOI PilotAdvance e PreAdvance_ AfterDelay PostDelay PilotDuration PreDuration MainDuration _ AfterDuration PostDuration Pilot Pulse Pre Pulse Main Pulse After Pulse Post Pulse Figure 16 Fuel Pulse Timing Diagram for EPT mode Start Of Injection SON CA DBTDC The main fuel pulse is generated with a leading edge coinciding with SOI The length of the pulse will be according to MainDuration_DI The units of SOI are crank angle degrees before TDC The timing of the pilot and pre pulses is referenced to SOI The timing of the after pulse is referenced to t
48. nnected between the input and ground For active low commands the inputs should be pulled high with the resistor connected between the input and 5V or the main power source If 5V is used then the 5V output pins 4 5 of the NI 9411 module may be used for this purpose The maximum allowed injection pulse is internally limited to 5 msec therefore if any channels are commanded continuously a 5 msec injection may occur on an injector As long as the input remained active no other injection events would be allowed because only one injector is allowed to be commanded at a time If any injection commands to the same DI Driver module overlap then all injection events for that module will be turned off for the portion where overlap occurs When using another engine control system to command the SADI Driver System it is likely that the port fuel injector or ignition driver outputs of the engine controller will be used Typically port Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 15 Drivven Inc SADI Driver System fuel injector or ignition driver outputs are low side driver circuits This means that one side of the port fuel injector solenoid or ignition coil primary is connected to battery while the other side low side is connected to the engine controller and programmatically switched to ground during fuel injection pulses or ignition dwell respectively In order to utilize these low side driver outputs to command the SADI
49. on Explorer or MAX There is a series of dip switches on the front panel of the cRIO 9012 controller Turn the dip switch labeled IP RESET to ON to the left Using a small Phillips screwdriver press the recessed RESET button to reset the controller This will cause the controller to reboot and the IP address to be cleared Wait for about 10 seconds and set the IP RESET dip switch back to OFF Assuming that the cRIO 9012 controller is already on your network or directly connected to your computer using a Ethernet cable you can use MAX to navigate to the controller settings window Within MAX you can navigate to the Remote Systems and find your cRIO 9012 controller having the special IP address of 0 0 0 0 Click on this system to view the system identification and IP settings in the window to the right Proceed to make any necessary changes and apply them Note that the IP RESET procedure is only necessary if the preconfigured IP address from Drivven 192 168 0 131 is not compatible with your network or your computer s subnet If it is compatible then you should be able to find the system within MAX without resetting the IP address Then you can proceed to make the necessary changes and apply them Keep in mind that if you are connecting to the cRIO system point to point directly with your computer then be sure to leave the Gateway and DNS fields empty Otherwise CalVIEW will have difficulty locating the system If the cRIO is placed on
50. pFlag Boolean Set to TRUE upon CrankCount being incremented past the expected value for the location of a gap before the gap is detected In other words physical teeth are received at the location where a gap Is expected This condition causes a loss of sync Re sync is not allowed until the flag is cleared by setting SyncFlagClear to TRUE NoCamFlag Boolean Set to TRUE upon detecting 2 consecutive gaps without detecting a TRUE CamSig Stroke TRUE CamSig is only sampled at gap detection This condition does not cause a loss of sync NoCamFlag is cleared by setting SyncFlagClear to TRUE N 1 Only Plus1Location Boolean FALSE Adv TRUE Ret When FALSE the EPT is configured to look for a Plus1 tooth which is advanced from the mid point between two evenly spaced crank teeth An advanced Plus1 tooth should be advanced from the mid point by approximately of the total normal tooth spacing When TRUE the EPT is configured to look for a Plus1 tooth which is retarded from the midpoint between two evenly spaced crank teeth A retarded Plus1 tooth should be retarded from the mid point by approximately 1 4 of the total normal tooth spacing This parameter is only available for Plus1 pattern types AllowNoCamStart Boolean When AllowNoCamStart is TRUE and Stroke is TRUE the EPT will begin sync at the first occurrence of the pattern specific unique crankshaft feature such as a crank tooth gap or a plus1 tooth If the cam signal is TRUE during th
51. sec PreDuration_DI 0 msec MainDuration_DI 0 msec AfterDelay_DI 0 msec AfterDuration_DI 0 msec PostDelay_DI 0 msec PilotOffset_TMP 0 msec PilotDuration TMP 0 msec PreOffset_TMP 0 msec PreDuration_TMP 0 msec MainDuration_TMP 0 msec MainOffset_TMP 0 msec AfterOffset_TMP 0 msec AfterDuration_ TMP 0 msec PostOffset_TMP 0 msec PostDuration TMP 0 msec SADI Driver System Stand Alone Direct Injector Driver System with EPT TMP and Calibration Command TMP_ChaniEnable OFF TMP_Chan2Enable OFF TMP_Chan3Enable OFF Direct Mode DIR_Trigger_Delay 0 msec DIR_ChaniEnable OFF DIR_Chan2Enable OFF DIR_Chan3Enable OFF CalSeqStart OFF CalSeqDuration 0 CalSeqPeriod 0 CalSeqPulses 0 l CalSeqProgress PostDuration_DI 0 msec Figure 15 Mode Setup Tab User Interface The Mode Setup Tab is broken into four different sections of controls and indicators Each section is independent of one another and only active when the Mode Selection combo box control is set to that section EPT Mode In this mode engine position tracking is used and the start of the main injection pulse is delivered at a user specified crank angle degree The TDCs of the channel s cylinder and the inputs for the EPT are set in the EPT tab Figure 16 is a diagram explaining the variables that define the injection pulse train when in EPT mode MainEnableX Boolean When TRUE all five fuel pulses are potentially e
52. tection of a pattern specific crank feature while the CrankCount value has not yet reached the expected value For example a gap has been detected sooner than expected while tracking an N M pattern This condition causes a loss of sync Re sync is not allowed until the flag is cleared by setting SyncFlagClear to TRUE Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 37 Drivven Inc SADI Driver System N M Only NumberOfMissingTeeth Teeth Specifies the number of missing adjacent teeth on the crankshaft trigger wheel for an N M pattern type For example a 60 2 crankshaft pattern would have NumberOfMissing Teeth 2 This parameter is only available for N M pattern types AllowNoCamStart Boolean When AllowNoCamStart is TRUE and Stroke is TRUE the EPT will begin sync at the first occurrence of the pattern specific unique crankshaft feature such as a crank tooth gap or a plus1 tooth If the cam signal is TRUE during the gap then tooth number will start from 0 If the cam signal is FALSE during the gap then tooth count will start from mid cycle When AllowNoCamStart is FALSE and Stroke is TRUE sync will only be started when the crank feature is found while the cam signal is true therefore only starting tooth count from 0 Only set this input to TRUE if it is OK to be in sync 360 degrees out of phase in the case of a disconnected or faulty cam sensor This parameter is only available for N M and N 1 pattern types MissedGa
53. those settings must be saved within the calibration interface If the customer provided Drivven with an injector for current profile calibration beforehand then those calibrations will already be saved when the customer receives the system Connecting to the System Calibration Interface The SADI Driver System cRIO 9012 controller is delivered to customers with an IP address of 192 168 0 131 unless otherwise specified by the customer The controller can also be configured to operate in DHCP mode The first thing that must be done in order to connect to the calibration interface is install the National Instruments Standard Run time Engine 2009 sp1 or later as required by the version of CalVIEW being used Go to the National Instruments website support page at ni com support and select the Drivers and Updates from the left column Enter a search term of Run time Engine 2009 sp1 and then select the appropriate Standard not minimum Run time Engine version required by CalVIEW This is shown below in Figure 9 properly configured to search for the LabVIEW Run time Engine Be sure to install any patches if necessary Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 19 Drivven Inc SADI Driver System labview run time engine 2009 Help View as List View as Table 1 10 of 20 Show 10 20 results per page 12 Next D Product Download Operating System Release Software Download Version Date Language S RIA s Chinese
54. uel pulse PostDuration is entered as a time with units of milliseconds PostDuration is limited to a value of 5 msec in order to protect the DI driver module Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 32 Drivven Inc SADI Driver System lt PostOffset gt a AfterOffset gt Trigger Ge MainOffset x PreOffset x PilotOffset lt gt PilotDuration PreDuration MainDuration _ AfterDuration PostDuration o e oo ni Pilot Pulse Pre Pulse Main Pulse Alter Pulse Post Pulse Figure 17 Fuel Pulse Timing Diagram for TMP mode TMP Mode PilotOffset_TMP msec Determines the initial delay between the incoming trigger and pilot pulse PilotOffset_TMP is entered as a time with units of milliseconds On the RT controller all of the TMP offset values are limited to 10 seconds for safety considerations PilotDuration TMP msec Determines the length of the pilot fuel pulse PilotDuration is entered as a time with units of milliseconds PilotDuration is limited to a value of 5 msec PreOffset_TMP msec Sets the delay between the start of the pilot pulse and the pre pulse pulse On the RT controller all of the TMP offset values are limited to 10 seconds for safety considerations PreDuration_TMP msec Determines the length of the pre fuel pulse PreDuration is entered as a time with units of milliseconds PreDuration is limited to
55. ues for each channel Example 1 Correct positional order is maintained TDC1 0 TDC2 240 TDC3 480 Example 2 Correct positional order is maintained TDC1 240 TDC2 480 TDC3 0 Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 36 Drivven Inc SADI Driver System Example 3 Incorrect positional order is not maintained TDC1 0 TDC2 480 TDC3 240 SyncEnable Boolean When TRUE sync is enabled and position tracking will take place if a valid crank and cam signal pattern is presented to the EPT VI at an engine speed greater than the stall speed SyncFlagClear Boolean When TRUE any error within the EPT Data output will be cleared EngineSimEnable Boolean When TRUE CrankSig and CamSig inputs are internally disconnected from the EPT processor and simulated signals are connected in their place SimSpeed RPM The simulated speed of the EPT when EngineSimEnable is true The EPT will not sync to the simulator unless the effective engine speed is greater than the stall speed EngineSpeed RPM Engine speed output from the EPT EngineStatus Combo box indicating the status of the engine to be cranking stalled or running depending on the values of StallSpeed and CrankRunThreshold MaxCAT Ticks Maximum Crank Angle Ticks per engine cycle A Crank Angle Tick CAT is a single unit of angular measure reported by the EPT processor Reported as a power of two angular ticks of crank positio
56. ure fault this error needs to be resolved and cleared before any Low Side driver outputs will work LS ModulePresent Boolean TRUE when the Low Side Driver module is externally powered and detected by the controller RailPCriticalFault Boolean TRUE when the rail pressure has exceeded the RailPCFThresh IMV_LS OpenFault Boolean TRUE when an open circuit is detected on the channels of the Low Side Driver that are controlling the IMV See the Low Side Driver manual for more information IMV_LS ShortFault Boolean TRUE when a short circuit is detected on the channels of the Low Side Driver that are controlling the IMV See the Low Side Driver manual for more information HPV_LS OpenFault Boolean TRUE when an open circuit is detected on the channels of the Low Side Driver that are controlling the HPV See the Low Side Driver manual for more information Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 42 Drivven Inc SADI Driver System HPV_LS ShortFault Boolean TRUE when a short circuit is detected on the channels of the Low Side Driver that are controlling the HPV See the Low Side Driver manual for more information RailPCFThresh bar An upper set point that defines when the rail pressure has exceeded a critical level that could potentially damage hardware If this threshold is exceeded the low side channels controlling the IMV and HPV turn off until the error has been cleared BattV Volts Battery voltage
57. verseBatteryNotice pdf document available on the website for a recommended solution for protecting a system from reverse battery polarity The SADI Driver System requires power from a battery or switching power supply ranging from 9V to 32V If the source is ever expected to drop briefly below 9V such as during engine cranking then a separate power source should be supplied to the cRIO 9012 controller to prevent controller reset If using a separate power source for the cRIO 9012 it is not necessary to connect the grounds between the two power supplies But it is okay if they are connected The power source for the NI 9411 Drivven DI Driver and Low Side Driver modules should not fall below 7V The NI 9411 does not need to be connected to the power supply unless the 5V outputs are going to be used Refer to the component Pinouts above for proper screw terminal connections for power and Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 11 Drivven Inc SADI Driver System ground Powers and grounds should be connected in a star fashion and not daisy chained A daisy chained power configuration may cause bad fluctuations in power to each module during operation Drivven recommends using soldered or well crimped ferrules on all screw terminal connections as shown below in Figure 5 att Figure 5 Use of Ferrules on Screw Terminal Connections Drivven Inc 2009 e SADI Driver System Users Manual DO0010X 12 Drivven Inc
58. x Maximum duty cycle allowed from the IMV PID controller output without feedforward IMVPIDMin Minimum duty cycle allowed from the IMV PID controller output without feedforward IMVPIDFF Feed forward duty cycle added to the PID controller duty cycle output when FuelPControlMode is in IMV PID Mode IMVNonPIDFF Feed forward duty cycle added to the PID controller duty cycle output when FuelPControlMode is in HPV PID Mode IMV_DCMax Calculated duty cycle that limits the Low Side Driver from exceeding the current limitations on the IMV IMV_DCMin Manual set point that coerces the output of the PID controller to not drop below this value unless the IMV is disabled IMV_DutyCycle Duty cycle that is written to the Low Side driver regardless of what mode the controller is in This duty cycle is only applied if IMVEnable is TRUE IMV_PID Duty cycle that is output by the PID controller This value is added to the feed forward value to calculate the IMV_DutyCycle This is value shows you the influence of the PID controller on IMV_DutyCycle IMVNomResitance Ohm Nominal resistance of the IMV This value is used to calculate the maximum duty cycle that can be used to control the IMV A maximum duty cycle is calculated to prevent the current limit of the Low Side Driver channel from being exceeded It is important to measure this resistance correctly within 0 5 ohms IMVFreq Hz Frequency of PWM controlling IMV H

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