BENDIX BW2594 User's Manual
Contents
1. Section IV Air System Components cont d Discharge line First component after compressor filters separators traps dryers What Line size to Distance to Second component after compressor filters separators traps dryers What Line size to Distance to Third component after compressor filters separators traps dryers What Line size to Distance to Is the discharge piping routed in a downhill manner to the air dryer YES NOL Measured compressor discharge pressure measured at the compressor Recommended Test Procedure Install a pressure gauge at the discharge fitting of the compressor and record the discharge pressure at the time of governor cut out with engine at rated speed Was measured discharge pressure greater than 170 psi YES _ NOL Page 11 of 18 12 Bendix BA 921 Compressor Installation and Application Review Section IV Air System Components cont d Total Reservoir Volume Charge time required to raise the reservoir pressure from governor cut in to cut out at maximum rated engine speed Recommended Test Procedure Drain down the entire air system supply service and accessory tanks to below 75 psi As the compressor runs to charge up the air system start a timer when the tank pressure reaches the governor cut in pressure Stop the timer when the compressor cut out dryer purge can usually be heard Was measure2. L Compressor mounted L Air Dryer Mounted C Remote Compressor control L Governor for Compressor Unloader Governor part number and or vendor Cut out pressure Range or band L Governor with discharge line unloading Governor part number and or vendor Cut out pressure Range or band Governor air signal line size length Governor air control line size length Page 15 of 18 16 am Bendix BA 921 Compressor Installation and Application Review Section IV Air System Components cont d Air Dryer Air Dryer part number and or vendor Maximum allowable temperature to the dryer 160 F Bendix Air Dryers Requirement Minimum allowable temperature to the dryer 45 F above lowest ambient Bendix Air Dryer Requirement Recommended Test Procedure Install a temperature probe at the air dryer inlet fitting Operate the vehicle such that the engine is at operating temperature Drain an air tank such that the compressor runs continuously but the pressure remains about 10 psi below the governor cut out pressure Note the dryer air inlet temperature after the compressor has run for 90 seconds with the engine running at rated speed Also note the ambient temperature To obtain the maximum air inlet temperature add the difference between the recorded inlet temperature and the noted ambient temperature to the maximum expected ambient temperature Likewise add the temperature difference to the m
3. at rated speed YES NOL Measured Coolant Pressure Drop Alternative measurement method Pressure drop across compressor coolant inlet and outlet ports At engine idle At engine rated speed Recommended Test Procedure Install a pressure gauges at the coolant inlet and outlet fittings of the air compressor Record the pressures or pressure differential at engine idle and engine maximum rated speed Was the measured pressure drop greater than 0 8 psi at idle and 1 6 psi at maximum rated speed YES NOL Page 13 of 18 14 Bendix BA 921 Compressor Installation and Application Review Section IV Air System Components cont d Compressor Oil Supply Source Line size to Distance to Compressor Oil Return L Return through front flange Ll Return through bottom drain only L Return through both bottom drain and front flange Measured Oil Supply Pressure record at compressor fitting at engine idle Recommended Test Procedure Install a pressure gauge at the oil fitting on the air compressor Record the oil pressure at engine idle with the engine at normal operating temperature Was measured oil supply pressure greater than 14 0 psi YES _ NOL Describe any auxiliary fittings at the oil supply of the compressor Page 14 of 18 15 Bendix BA 921 Compressor Installation and Application Review Section IV Air System Components cont d Governor location
4. engine air inlet restriction see the engine manufacturer s engine data sheet Clean Dirty Recommended Test Procedure Install a water manometer gauge to read the pressure at the air inlet fitting on the compressor If the compressor shares the engine air intake system then restrict the engine air filter such that at rated engine power and speed the engine is at its maximum allowable inlet restriction for a dirty filter see the engine data sheet Under this condition operate the engine at rated speed and power and read the pressure at the compressor air inlet fitting while the compressor is loaded pumping Measured compressor air inlet restriction measured at compressor at rated engine speed and power with a dirty filter L Dedicated air compressor filter Description Measured compressor air inlet restriction measured at compressor at rated engine speed and power with a dirty filter Page 7 of 18 Bendix BA 921 Compressor Installation and Application Review Section IV Air System Components cont d Compressor Air Induction System Naturally Aspirated Compressor Applications Only Cont d Line size Line length Expected Measured Worst Case Inlet Air Temperature Was measured restriction less than 25 in H0 YES NOL Is the inlet air temperature greater than 170 F YES _ NOL Recommended Test Procedure Install a temperature probe in the air compressor in
5. am Bendix BA 921 Compressor Installation and Application Review Bendix BA 921 Compressor Complete one Compressor Installation and Application Review Form for each fleet installation arrangement vehicle type engine combination and send to Bendix Commercial Vehicle Systems LLC Attn Hans Burkhardt Product Engineer Cc Mark McCollough Engineering Manager 901 Cleveland Street Elyria Ohio 44035 Note Measurements should be made with commercial grade instruments with tolerances of 3 max CAUTION When working on vehicles and or carrying out testing procedures always follow standard industry safety guidelines including the use of adequate eye protection etc Compressor Part Number Compressor Serial Number Vehicle Make and Model Engine Make and Model Engine Serial Unit Number Submitted By Employed By Date Submitted The following items should accompany this form Attach any available air system schematic Attach available technical information for associated components Attach photos of the compressor installation Attach photos of the compressor air inlet hose arrangement Attach photos of the compressor governor arrangement Attach photos of any devices in the discharge line Attach photos of the air dryer Page 1 of 18 am Bendix BA 921 Compressor Installation and Application Review Section I Application Information Check the boxes that best apply and use the c
6. d charge time less than 90 seconds YES _ NOL Coolant Supply Source Line size to Distance to Maximum allowable engine coolant temperature Maximum expected compressor coolant temperature Recommended Test Procedure Install a temperature probe in the coolant supply fitting on the compressor and either monitor or measure the engine coolant temperature at thermostat housing Operate the vehicle such that the engine reaches operating temperature Record the engine coolant temperature and the compressor coolant supply temperature The maximum expected compressor coolant temperature is sum of the recorded compressor coolant temperature and the difference between the recorded engine coolant temperature and the maximum allowable engine coolant temperature Is the maximum expected coolant supply temperature less than 220 F YES NOL Page 12 of 18 13 Bendix BA 921 Compressor Installation and Application Review Section IV Air System Components cont d Coolant Return Return Port Location Line size to Distance to Measured coolant flow rate At engine idle At engine rated speed Recommended Test Procedure Install a flow meter in series with the coolant supply or return line of the air compressor Note the flow rate through the compressor when the engine thermostats are open at engine idle and rated speed Was measured flow rate greater than 4 gpm at idle and 1 4 gpm
7. f the compressor Maximum charge time should not exceed 90 seconds Charge duration is the amount of time the compressor runs continuously Discharge temperature rises while the compressor is loaded so the longer the compressor runs the higher the discharge temperatures Keeping the charge times low helps to minimize discharge temperatures hence reducing carbon formation In addition the air dryer can only process a limited amount of air before requiring a purge cycle Minimizing the charge time reduces the burden on the air dryer Recommended Test Procedure Note The test conditions should be indicative of worse case conditions for the vehicle s vocation i e highway use versus city use Install a pressure switch 60 90 psi in the governor signal line Record the switch voltage or continuity during vehicle operation The duty cycle is the quotient of the compressor loaded time low pressure in the signal line and the total time Alternate methods to measure the duty of the vehicle can be utilized for example a pressure transducer installed at the unloader port of the air dryer with a data logger to collect the data The duration of the test should reflect the typical operating cycle of the vehicle The duration of the vehicle test should be 1 to 3 days minimum For vocation that exhibit large amounts of braking i e city use one day is adequate Under conditions with less braking i e highway use the duration should last at
8. inimum expected ambient temperature Measured inlet temperature to the dryer Ambient temperature at time of measurement What is the maximum expected ambient temperature What is the minimum expected ambient temperature What is the maximum expected dryer inlet temperature What is the minimum expected dryer inlet temperature Page 16 of 18 17 Bendix BA 921 Compressor Installation and Application Review COMMENTS BENDIX ENGINEERING USE ONLY Does the compressor installation meet all Bendix Commercial Vehicle Systems requirements C YES NO See BW 132 A BW 110 A BW 109 A and BW 100 A for complete application and installation requirements ACCEPTED YES NO APPROVED BY Engineer DATE APPROVED BY Manager DATE COMMENTS EXCEPTIONS Page 17 of 18 18 am Bendix BA 921 Compressor Installation and Application Review BW2594 2006 Bendix Commercial Vehicle Systems LLC 11 06 All Rights Reserved Page 18 of 18
9. least 3 days Was duty cycle measured NO YES Measured value Average charge time during test Maximum charge time during test Page 4 of 18 am Bendix BA 921 Compressor Installation and Application Review Section III Vehicle Engine Requirements and Expectations cont d Installation angles Engine installation angle Compressor rotated angle Gradability vehicle operation on slope Side For Aft Percent of time operated on inclines Compressor delivery system pressure Engine Rated Speed Air compressor drive ratio Page 5 of 18 am Bendix BA 921 Compressor Installation and Application Review Section III Vehicle Engine Requirements and Expectations cont d Compressor Thru drive Pump Drive For new applications refer to Bendix Application Guideline BW 100 A BW 132 A or Compressor Customer Drawing Thru drive to be used for Installed pump Vendor PN Operating torque Operating HP Worst case torque consider spikes and cold operation Worst case HP consider spikes and cold operation Describe pump motor control system Comments Page 6 of 18 Bendix BA 921 Compressor Installation and Application Review Section IV Air System Components Compressor Air Induction System Naturally Aspirated Compressor Applications Only Inlet Line Filter source L Engine Air Filter Allowable
10. let hose or fitting as close to the compressor as possible Operate the vehicle such that the engine is at operating temperature and the compressor is loaded pumping Record the compressor air inlet temperature and note the ambient temperature To obtain the maximum air inlet temperature add the difference between the recorded inlet temperature and the noted ambient temperature to the maximum expected ambient temperature Was the restriction measured per the recommended procedure YES C NOL If no describe the procedure used Page 8 of 18 Bendix BA 921 Compressor Installation and Application Review Section IV Air System Components Cont d Compressor Air Induction System Turbocharged Compressor Applications Only NOTE Testing should be performed by the engine Manufacturer Compressor Inlet Line The compressor inlet line will run from the pressurized side of the engine intake system i e intake manifold to the compressor inlet port Inlet line size Inlet line length Devices Components if any in the air induction system Describe system Expected Measured Worst Case Compressor Inlet Air Temperature Recommended Test Procedure to Measure Max Compressor Inlet Temperature Install a temperature probe in the air compressor inlet hose or fitting as close to the compressor as possible Operate the vehicle such that the engine is at operating temperature at conditions resulting in maxi
11. mum inlet air temperature i e engine load RPM etc Record the compressor air inlet temperature and note the ambient temperature Ambient temperature during test Is the maximum inlet air temperature greater than 250 F YES _ NOL Maximum boost pressure XXXX engine rpm Supply maximum boost vs engine RPM curves Page 9 of 18 10 Bendix BA 921 Compressor Installation and Application Review Section IV Air System Components Cont d Compressor Air Induction System Turbocharged Compressor Applications Only Cont d NOTE Testing should be performed by the engine Manufacturer Expected Measured Minimum Compressor Inlet Pressure Vacuum measured at compressor at rated engine speed and no engine load Note If it can be verified that positive boost pressure is available at operating temperatures with no engine load no test will be required Recommended Test Procedure to Measure Min Compressor Inlet Pressure Vacuum Install an appropriate pressure measurement device at the air inlet fitting on the compressor Bring the engine up to operating temperature Run the engine under a no load condition at rated engine speed and the compressor in the loaded compressor pumping condition Record the minimum compressor inlet pressure or vacuum Was measured compressor inlet pressure less than 25 in H20 YES _ NOL Page 10 of 18 11 am Bendix BA 921 Compressor Installation and Application Review
12. omments space to further clarify On Highway and Linehaul Straight truck Single trailer Double trailer Triple trailer Motor coach RV Other KIWI Vocational Delivery Dumper Mixer Terminal Jockey Bulk Unloader Transit Bus Crash Fire Rescue Other OCOL Off Highway and Military L Description Page 2 of 18 Bendix BA 921 Compressor Installation and Application Review Section IT Vehicle Features Requiring Air Check the boxes that best apply and use the comments space to further clarify Air brakes LI Multiple Axles C Number of axles Air suspension L Description Bulk Unloading L Typical time to unload Frequency of unloading events Central Tire Inflation C Description Kneeling capability bus feature L Doors or windshield wipers L Air park or door interlock L Lift Axles Ll Description Other Description Page 3 of 18 am Bendix BA 921 Compressor Installation and Application Review Section ITI Vehicle Engine Requirements and Expectations Life expectation in hours or miles Duty Cycle expectation percent time compressor operates loaded C 5 to 25 L greater than 25 Duty cycle is considered the percentage of time that the compressor is operated in the loaded pumping condition To calculate duty cycle the total loaded time is divided by the total operating time o
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