전자제어식 직접분사 디젤 엔진 연소실내의 분무연소 특성에 관한 연구

Abstract

It is well known that the combustion phenomenon of diesel engine is an unsteady turbulent diffijsion combustion. Therefore, the combustion performance of diesel engine is related to a complex phenomenon which involves the various factors of combustion, such as a injection pressure,injection timing, injection rate, and operating conditions of engine. In this study, the spray and the flame development processes in a single cylinder D.I. diesel visualization engine which uses the electronically controlled injection system were visualized to interpret the complicated combustion phenomenon by using high speed CCD camera. In addition, the cylinder pressure and heat release rate were also obtained in order to analyze the diesel combustion characteristics under several engine conditions.