Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Effects of Operation Conditions on Hydrocarbon Components Emitted from SI Engine with Gaseous Fuels

기체 연료를 사용한 전기점화기관에서 운전조건이 HC 배출물 성분에 미치는 영향

  • 박종범 (정회원, 서울대학교 대학원) ;
  • 최희명 (정회원, 서울대학교 대학원) ;
  • 이형승 (정회원, 서울대학교 대학원) ;
  • 김응서 (정회원, 서울대학교 기계공학과)
  • Published : 1998.01.01
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Abstract

Using gas chromatography, the light hydrocarbon emissions were analyzed from SI engine fueled with methane and liquified petroleum gas(LPG), and the effects of fuel and engine operating condition were discussed. For this purpose, 14 species of light hydrocarbon including 1, 3-butadiene were separated, calibrated with standard gas, and measured from undiluted emissions. The brake specific hydrocarbon emission(BSHC) and ozone forming potential(BSO)3 were calculated and discussed with the changes of fuel, engine speed, load, fuel/air equivalence ratio, coolant temperature, and spark timing. As a result, exhaust emission was composed of mainly fuel composed of mainly fuel comp- onent and other olefin components of similar carbon number. The olefin components such as ethylene and propylene determine most of the ozone forming potential. The fraction of fuel component in total hydrocarbon emission was bigger with methane fuel than with LPG fuel. Also fuel fraction increased at high speed or high speed or high temperature of exhaust gas, and to lesser extent with high coolant temperature and retarded spark. However, the effect of equivalence ratio had different tendency according to fuels.

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References

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