Transactions of the Korean Society of Automotive Engineers (한국자동차공학회논문집)

The Korean Society of Automotive Engineers (한국자동차공학회)
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Effects of Injection Timing on the Lean Misfire Limit in a SI Engine

가솔린 엔진의 연료분사시기가 희박가연한계에 미치는 영향에 관한 연구

  • 엄인용 (현대자동차(주) 중앙연구소) ;
  • 정경석 (정회원, 한국기술교육대학교) ;
  • 정인석 (정회원, 서울대학교)
  • Published : 1997.09.01
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Abstract

Effects of fuel injection timing on the lean misfire limit of a sequential MPI SI engine has been investigated. To investigate the interaction of injection timing and intake flow characteristics, so called axial stratification phenomena, 4 kinds of different intake swirl port of the same combustion chamber geometry have been teated in a single cylinder engine test bench. And 2 kinds of fuel, gasoline and compressed natural gas(CNG), were used to see the effect of liquid fuel vaporization. Result shows that combination of port swirl and injection timing governs the lean misfire limit and lean misfire limit envelopes remain almost the same for a given ratio regardless of engine speed. It is also found that two phase flow has some effects on lean misfire limit.

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References

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