Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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A Study on Waveform Analysis of Oxygen Sensor, Injector and Secondary Waveform through Emission Characteristics by a Decrepit Vehicle

노후 차량의 배기가스 측정을 이용한 산소센서, 인젝터, 점화2차파형의 파형분석 연구

  • Yoo, Jongsik (Department of Automobile & Machinery, Daewon University College) ;
  • Kim, Chulsoo (School of Mechanical and Automotive Engineering, Gangneung-Wonju National University)
  • 유종식 (대원대학교 자동차기계계열) ;
  • 김철수 (강릉원주대학교 기계자동차공학부)
  • Received : 2012.12.04
  • Accepted : 2013.03.27
  • Published : 2013.09.01
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Abstract

The experiment was done on cars travelling at the speeds of 20km/h, 60km/h and 100km/h using the performance testing mode for chassis dynamometer. In this experiment, the relativity between the secondary waveform coming from ignition coil and exhaust emissions were measured in case of cars with failures, in oxygen sensor, spark plugs. The following results obtained by analysis of the relativity between the secondary waveform and exhaust emissions. 1) When the oxygen sensor is failure, the average value of CO emission measured was 6.8 times higher than the standard CO emission value and the average value of HC emission measured was 2.3 times higher than the standard emission level. 2) When engine parts are in failure, more fuel enters the cylinder due to longer opening duration of injector, and it tended to make CO and HC emission values increase. 3) Combustion duration, the shape of flame propagation during spark line, and the size of the discharge-induced energy were the three main elements that directly cause variations in CO and HC emission values.

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References

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Cited by

  1. A Study on Correlation of Effective Discharge Energy and Exhaust Emission of Gasoline Vehicle vol.22, pp.7, 2014, https://doi.org/10.7467/KSAE.2014.22.7.070