A Study on Fault Diagnosis of Vehicles using the Sound
Contents
1. Airconditioner ggiggiggi ggigik ggigik ggiririck ggiririck 499 66 ggiggiggi ggieik baaaang baaang ddagddagddag ddagakddagak Regular Fricative sound faduck faduck shwoo shwoo connecting rod Damage of rubber mounting which fixed engine and transmission Fall out the exhaust system and decline of engine output which leak gas because of abnormalityof exhaust manifolds muffler Damage and abrasion constant velocity joint which deliver the change of speed to wheel Damage the releasebearing which block the engine power Pilot bearing connected with main axis release lever abrasion of shift lever asynchronism phenomenon of synchromesh Breakdown of bearing airconditioner belt and compressor rotating unit Discordance of ring gear of fly wheel and starter motor or battery consume Damage of pulley part which connected drive belt Blockage of muffler and exhaust manifold in winter Abnormality of lubrication system and valve clearance because of shortage of warm up in winter Abnormality of valve clearance and abrasion of CAM axis Occurance when abnormality of moving component according to engine rotation especially timing belt Annealing or slagging of timing belt and drive belt Drive belt increase noise when it accelerate Timing belt decrease noise when it accelerate Unusual suction phen2. Publishing yundoo m amp b May 2013 4 Kwankwon Kim Translation amp Edit What s Car Looks deceive Sin Sung Publisher sacred editorial March 2011 5 Hyungwoo Park Jong Jin Yoon Gyu Tae Baek Young Hoon Yoon Myung JinBae Study on comparison of low range sound field of domestic RV vehicles The Institute of Electronics Engineers of Korea Electronic Engineering Society Summer Research Scientific Meeting in 2011 Vol 34 pp 802 803 2011 6 M J Bae and S H Lee Digital Voice Signal Analysis Books Publishing Dong Young 1998 ch 3 6 7 Jaehong Park Here is a problem in my car book publishing BUKI May 1997 8 Chilho Jho car stand alone Golden Bell January 1995 9 Jupil Choi Let s ride to know car book publishing ILJINSA January 1995 10 Youngsun Choun car talk Jung Woo Corporation October 1990 Corresponding author Myung jin Bae Ph D Department of Information Telecommunication Soongsil University 369 Sangdo ro Dongjak gu Seoul 156 743 Korea www joetsite com
3. has one car owner drivers should have interest in not only www joetsite com Journal of Engineering Technology Volume 3 July 2015 Pages 89 95 ORIGINAL ARTICLE purchasing and driving a car but also using car economically by maintaining and diagnosing in advance to prevent a fault For this government or car manufacturing companies should give diagnosis archive using the sound to owner drivers and the application is need to be made in the smart environment Therefore I suggest that the car manufacturing companies collect sounds by making situations before releasing a new car and analyze what the sounds indicate and make data Then they make a car diagnostic program and give it to drivers Besides as we are living in the smart environment the plan which grafts the car fault diagnostic sound onto the application is suggested Then by introducing sound recognition technology on a car the system which informs drivers of warning by collecting analyzing and diagnosing is considered This is what automobile companies should have for their benefit responsibility and obligation REFERENCES 1 S G Bae M J Bae A New Non uniform Sampling amp Quantization by using a Modified Correlation IJSEIA Vol 7 No 2 pp 391 398 November 2013 2 S G Bae M J Bae On A New Hybrid Speech Code using Variables LPF IJSEIA Vol 7 No 5 pp 129 136 September 2013 3 Chihyeon Kim Taewook Jeong User s Manual for my car Books
4. number of having a car in Korea is more than 18 million However ignorance of an owner driver regarding a car is more serious than we expected There are many drivers who just know when the engine oil should be changed and how to put washer fluid and don t open engine room before having a problem These drivers are embarrassed when their car has a problem and handle this problem poorly Also they could be ripped off from repair companies However if they have the interest in a car and knowledge of maintenance they can prevent an accident and tyranny of repair companies Human has an ability to use five senses sight touch smell taste and hearing In case of diagnosing a car problem the five senses can be actively used and even sixth sense can be used However in realistic car diagnostics there is a diagnostic which uses four senses except for the taste which people should taste First by the sight drivers can diagnose conditions such as an appearance of a car an amount of engine oil a battery when a car is parked Then sign of gauge can be used to diagnose with naked eyes when a car is in standby or runs Second by the touch drivers can diagnose a condition of a car with the abnormal vibration which drivers feel from the steering wheel and a seat during staring a car or driving Third by the smell drivers can diagnose a t A corresponding author Myungjin Bae www joetsite com Journal of Engineering Technology Volume 3 Ju
5. Journal of Engineering Technology Volume 3 July 2015 Pages 89 95 ORIGINAL ARTICLE A Study on Fault Diagnosis of Vehicles using the Sound Signal in Audio Signal Processing Ik sooAhn Seong geon Bae Myung jin Bae Information and Telecommunication Department Soongsil University 1 1 Sangdo 5 dong DongJak Ku Seoul 156 743 Republic of Korea Abstract The purpose of this paper is to do the advanced prevention for a serious car accident and to diagnose and repair a car trouble by archiving accumulated sounds of car problems A car informs a driver of several symptoms when a certain part has a problem or it gives notice of a problem The symptoms are like an abnormal vibration which a driver feels some symptom which a driver can see abnormality which a driver smells and a sound when staring a machine Among these a sound plays a role as direct early warning Also since a sound is expressed in various ways it is valuable to use as a diagnostic program by dating A car diagnostic program through a sound can be given to an owner driver when a car is released can do self diagnosis by installing on a car and can be used with an application in smart environment Keywords Diagnostic self diagnosis Analysis 1 INTRODUCTION Recently Korea joints the line of powerful nations for a car and competes with world prominent car brands In data of current situation of registration for a car in Korea each car registers population of 2 74 and the
6. aveform analysis according to the trouble situation of the same type the possibility of commercialization of the car fault diagnostics program was confirmed The possibility of commercialization can be explained with flowchart in Fig 3 By comparing and analyzing starting sound engine sound and driving sound with the existing data of trouble sound through the sound recognizer and warning with an indicator light alarm or voice drivers can do preventive maintenance Therefore they can prevent the accident caused of trouble of a car 2 4 Data of the breakdown sound Table 1 is an example which collects data of diverse studied sounds related to a car trouble The sound of the normal car is standard and the trouble sound is divided into the trouble sound when a car is parked and the trouble sound when a car runs Also the trouble sound when a car is parked is classified into idling and starting and the trouble sound when a car runs is divided into an engine part and others With fault diagnosis details the trouble sound is well described by Korean language which is a phonetic word Table 1 Trouble diagnosis details and solution plan through the sounds which occur at the Vehicle Problem Generative Sound Diagnostic contents Solution Plan www joetsite com Journal of Engineering Technology Volume 3 July 2015 Pages 89 95 ORIGINAL ARTICLE Part a Coolant Engine oillack Engine Coolant Engine oil 81 SIE 51 818 Overheat Sup
7. car In order to install self sound diagnosis system on a car the voice recognizer should be installed on a car and programming is needed to analyze the archived sounds of a car This effort not only contributes to cultural and technical improvement related to a car in one country but also prevents a loss to a country and rises in economic value by reducing the accident rate because of 4115 Audio Input gt A D Covertor gt es Figure 1 Diagram about for self Sound check system and Applying smart environment application a car trouble 2 1 For experimental purposes By comparing the engine idling sound of SUV and the engine idling sound of the same car which shows symptoms of a problem when a car is parked the characteristic of the sound is figured out and the possibility of the study on car fault diagnostics using the sound is diagnosed www joetsite com Journal of Engineering Technology Volume 3 July 2015 Pages 89 95 ORIGINAL ARTICLE 2 2 Experimental methods Breakdown Sound Normal Sound Figure 2 Comparative and analysis spectrum about the Sound of generator failure and normal vehicle First keep data after recording the idling sound of engine when a normal car is parked Second keep data after recording the idling sound of engine of the same car which shows the symptoms of a problem when an abnormal car is parked The engine idling sound of the normal car is called standard sound and the engine idling so
8. ly 2015 Pages 89 95 ORIGINAL ARTICLE car problem through the smell from a car However when drivers smell something usually it indicates serious problems in a car Therefore drivers should stop a car when they smell Forth is the diagnosis through hearing which this paper handles A car is whole of the most advanced scientific technology which operates as more 25 000 components engage one another Also the interest in the sound which the components make is valuable data to diagnose a car problem 2 STUDY REGARDING CAR DIAGNOSTICS THROUGH THE SOUND This paper is the study about diagnostics for a car through the sound For individual this study needs a lot of time and labor Therefore cooperation with repair companies car manufacturing companies and centers for automotive research is needed Although each car model is different basic structure and principle are the same Therefore the same part which has a problem makes similar sounds As a result the study on the fault diagnosis in accordance with the sound is regardless of a car model However in case of using the self diagnosis program and the application in the smart environment the voice recognition technology should be introduced Therefore the same model should be used to get are exact result of a diagnosis The best way is that when car manufacturing companies has a plan of a new car they make fault conditions on purpose extract sounds and archive the data before releasing a
9. omenon of air into the intake system or more change Check the part and repair mounting Check and repair the exhaust manifolds Check the velocity joint constant Check the bearing release Check the gearbox Check the air conditioner part Exchange or recharge the battery and check the starter part Check and repair the drive belt part Check and repair the exhaust part Check repair the lubrication or valve system Check the CAM axis rocker arm and valve clearance Check the timing belt and drive part Check the timing belt and drive part Check the tighten condition Checktheintake system related parts repair 3 CONCLUSION Owner drivers misunderstand They think that a car is durable goods like a building However a car is also consumable It 1s consumer goods which people should maintain to use for a long time Since a car is mutual combination of mechanism and a moveable machine which operates by meshing the sound is generated However there is difference between the normal car sound and the abnormal car sound The sound makes it possible to do the fastest diagnosis among human s senses Because drivers are always sensitive to the sound they can recognize the strange symptom early Recognizing early can prevent a trouble in advance which can be serious later and it is confirmed that the sound is the excellent data for the car fault diagnostics As generation which each adult
10. ple cs ia ws Radiator part ggik ggik Radiator trouble Engine Overheat Replacement ee ET Gasket damage Engine oil ggiggik ggiggik D Gasket Replacement coari 199 Water pump bearing garrik garrik Coolant Water Pump Trouble Service ete nie Radiator hose damage Engine Hose Coolant Overheat Supplement kooluck kooluck ooa M E Thermostat Exchange Engine O H Engine UR ibe Water percolates Spark plug Dehumidification Part Failure Exchange fa fafafak fafafafak Ignition system fail Incomplete Ignition system Check combustion SVC Bs Suction or Exhaust trouble Engine Hose orGasket shue shweek concern Exchange Abnormality of a drive shaft which sai dit Pian dulkulk dulkulk take charge the drive train ratting y aa change the rusty or because of water and humidity broken part 2 A Shortage of oil at each part engine oil supplement amp woowoong ee transmission break exchange Injection of foreign substance in Eliminate foreign dalgrak dalgrak engine room and faulty of fastener substance check the condition fastener condition Brake bbee ik Brakepad or brake shoeAbrasion Brake pad phenom shoeExchange Drive cc m Dane oe a pare oo Check the brake and Brake gruc gruck hardening of pad foreign take action substance a a Fricative because of gear shift Check gear shift change 55a Bealls abrasion and supplement the oil Handle ddagurak Damage of steering gear due to Check and repair the
11. shock radical control steering gear box rae a Occur when we turn the handle Check the steering 88 Faulty of fastener and abrasion system 7 M Damage of shock absorber because SuspensionCheck Bumpy bbeegguk change the shock of shock from uneven ground Etc absorber Part Loosening connector of Io l l Bumpy ddooduk ni greases shortage of AR Situation ta Variables drive shaftCheck curve geiggiggigik Tire jjalggakjjalgak Accel tungtung Accel gu woong Accel jjeejikyjeejik Accel dudook du Damage of tire wheel packing and bearing Run a nail into tire or injection foreign substance into hubcap Damage of drive shaft bearing joint gear Sound due to break down of gearing and abrasion of transmission gear Slag of fan belt tension and overage phenomenon Metal trouble because of the abrasion of crankshaft of change the abnormality part Repair at the near garage Check the drive shaft Check the transmission and subsynchronous Control the tension and change the fan belt Check amp repair transmission engine oil www joetsite com Journal of Engineering Technology Volume 3 July 2015 Pages 89 95 ORIGINAL ARTICLE Stop Starting Idling Accel chulkuck Accel burreeruruk gt budadadang Turn gururuck Step on the clutch ssheeik ssheeik Gear chang ggieeikggieeik
12. und of the abnormal car is called trouble sound Third by analyzing the standard sound and the trouble sound through an acoustic analysis program the data of the difference is made 2 3 Experiments and Results 1 Trouble Symptom repeating revolution sound of metal scratching was getting worse and suddenly a steering wheel and a brake pedal didn t work Therefore it could almost encounter a big accident 2 Cause of Trouble bad condition of looseness of a belt trouble of a generator because of a decrepit and damaged problem 3 Solution the belt and the generator were changed and the looseness of the belt was checked www joetsite com Journal of Engineering Technology Volume 3 July 2015 Pages 89 95 ORIGINAL ARTICLE Breakdown Sound Start Sound Comparison Analysis Idling Sound Driving Sound Instrument Panel Voice Alarm Normal Sound of Vehicle l Maintenance Stedy State Operation Figure 3 Self diagnostic flow chart of the vehicle through the sound By analyzing spectrum of normal sound and abnormal sound the definite difference is shown The engine sound of the normal car is soft rhythmical and middle low tone like the waveform at the bottom of spectrum in Fig 2 However the engine sound when having a problem of the belt and the generator was friction sound in 3 000Hz 8 000Hz like an upward waveform Like waveform analysis in this experiment by making data of common w
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