정적 연소실내 혼합기 분포와 연소특성에 미치는 영향에 관한 실험적 연구

It is well known that the stratified charge combustion has many kind of advantages to combustion characteristics, such as higher thermal efficiency and Iess CO, NOx levels than conventional homogeneous mixture combustion. Although this combustion can be caused low fuel consumption, it is produced the high unburned hydrocarbon and soot levels because of different equivalence ratio in the combustion chamber. Moreover it has a lot of possibility of low output and misfire if the mixture gas would not be in existence around the spark plug. In this paper, fundamental studies for stratified combustion were carried out using a constant volume combustion chamber. The effect oflocally mixture gas distribution according to control the direct injection and premixed injection in the chamber were examined experimentally. In addition, the eflects of turbulence on stratified charge combustion process were observed by schlieren photography.