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[디젤엔진부문] 초희박 가솔린 예혼합기 유입에 의한 직접분사식 디젤기관의 연소 및 스모크 특성
유보선(Bosun Yoo),박정서(Jungseo Park),김문헌(Munheon Kim) 한국자동차공학회 2000 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In this paper, to find out the optimum operate condition which is in the smoke limit of conventional diesel engine, pre-mixed gasoline fuel was provided with compression ratio 19 : 1, ignited by direct injected diesel fuel. It was further injected in several steps, 0.373g/s, 0.308g/s, 0.182g/s. 0.141 g/s, 0.096g/s. to discover the combustion and smoke characteristics, and pre-mixed gasoline fuel was supplied until self-ignition occurred in lean region simultaneously. When pre-mixed gasoline air-fuel ratio was leaner than 120, there was no difference with case that only diesel fuel supplied and in case the richer region air-fuel ratio 38, the knocking was occurred. The brake power at the rate of diesel fuel injection 0.096g/s was about 1.5kw, but as the provided pre-mixed gasoline air-fuel ratio 48.43, the brake power increased to 4kw and smoke concentration was kept about 20~30%.