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자료유형
학술저널
저자정보
저널정보
한국자동차공학회 한국자동차공학회논문집 한국자동차공학회논문집 제10권 제4호
발행연도
2002.7
수록면
15 - 22 (8page)

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As the emission regulations on the automobiles have been increasingly stringent, precise control of air/fuel ration is one of the most important issues on the gasoline engines. Although many researches have been carried out to identify the fuel transport phenomena in the port fuel injection gasolines, mixture preparation in the cylinder has not been fully understood due to the complexity of fuel film behavior.
In this paper, the mixture preparation during cold engine start is studied by using a Fast Response Flame Ionization Detector.(FRFID) In order to estimate the transportation of injected fuel from the intake port into cylinder, the wall wetting fuel model was used. The two coefficient(α,β) of the wall-wetting fuel model was determined from the measured fuel mass that was inducted into the cylinder at the first cycle after injection cut-in. α( ratio of directly inducted fuel mass into cylinder from injected fuel mass) and β(ratio of indirectly inducted fuel mass into cylinder from wall wctted fuel film on the wall) was increased with increasing cooling water temperature. To reduce a air/fuel ratio fluctuation during cold engine start, the appropriate fuel injection rate was obtained from the wall wetting fuel model. Result of air/fuel ratio control, air/fuel excursion was reduced.

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ABSTRACT

1.서론

2.실험장치

3.벽류연료모델 및 공연비 측정

4.실험 결과 및 고찰

5.결론

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