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직접분사식 가솔린엔진의 피스톤 상면 형상이 성층화 연소에 미치는 영향
송재원(Jaewon Song),김미로(Miro Kim),조한승(Hanseong Cho),여진구(Jinku Yeo),조남효(Nam-Hyo Cho) 한국자동차공학회 2001 한국자동차공학회 춘 추계 학술대회 논문집 Vol.2001 No.5_1
A study to investigate the influence of the piston top face configuration on the combustion stability is presented using CFD analysis and single cylinder GDI engine. Initial configuration of the GDI piston was designed by 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 the geometries of the piston top face and the compression ratio have 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.