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직접분사식 가솔린엔진의 연소설 형상이 성층화 연소에 미치는 영향
송채원(Jae-Won Song),김미로(Mi-Ro Kim),조한승(Han-Seung Cho),여진구(Jin-Ku Yeo),조남효(Nam-Hyo Cho) 한국자동차공학회 2002 한국 자동차공학회논문집 Vol.10 No.1
A study to investigate the influence of combustion chamber shape, especially piston top face configuration. on the combustion stability is presented with CFD analysis and single cylinder GDI engine test. Initial configuration of the piston bowl was designed with CFD analysis and further parametric studies of the design factors on the piston top face were carried out through the single cylinder GDI engine test. It was found that both<br/> the geometry of piston top face and the compression ratio have great influences on the combustion stability. Of interest is that the design factors of the GDI piston to prevent mixture diffusion out of the piston bowl have important roles for the stable combustion at the stratified mixture condition. Also the relationship between spray impingement and flow pattern in a GDI piston bowl should be considered to design an optimal bowl configuration for stable stratified combustion.