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자료유형
학술대회자료
저자정보
저널정보
한국자동차공학회 한국자동차공학회 춘 추계 학술대회 논문집 한국자동차공학회 2003년 춘계학술대회논문집 1호
발행연도
2003.5
수록면
45 - 50 (6page)

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Lean bum was considered to overcome high thermal load and improve fuel economy in heavy duty SI engine. However, lean bum generally causes unstable engine operation due to combustion instability such as cyclic variation, misfire, or partial burning. To overcome such undesirable phenomena charge stratification inside the engine cylinder through fuel injection strategy was utilized and flow field enhancement through intake port and piston shape was adopted.
In this study, tile effects of swirl ratio and piston bowl shape on tile mixture preparation were investigated. High intensity of squish flow as well as swirl flow was acquired by the enlarged piston squish area and helical intake port. To obtain two dimensional fuel distribution planar ~laser induced fluorescence (PLIF) was used. Acetone was excited by KrF excimer laser (248nm) and its fluorescence image was acquired by ICCD camera. Fuel injection strategy with respect to the intake process was found to have the key role of tile whole stratification process. The intense squish flow was found to be effective to place relatively rich mixture to tile vicinity of spark plug in tile end period of compression process.

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ABSTRACT

1.서론

2.실험장치 및 방법

3.실험 결과

4.결론

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