A Study on Driving Stability of In-cylinder Direct Injection Stratified Charge Gasoline Engine - Effects on HR rate and $COV_{imep}$ of Fuel Injection Pressure and Load Variations -

연소실 직접분사식 성층급기 가솔린기관의 구동안정성에 관한 연구 -열방출율과 도시평균유효압력 변동에 미치는 연료분사압력과 부하변동의 영향-

In general, the stratified charge for direct injection gasoline engine should be introduced to achieve ultra-lean combustion scheme. In order to apply the concept of stratified charge into direct injection gasoline engine, a reflector was adapted on cylinder head. An installation of the reflector in front of the injector nozzle leads the mixture to be rich near spark plug. Therefore, the mixture near the spark plug is locally ich to ignite while the lean mixture is wholly introduced into the combustion chamber. In this paper, the characteristics of combustion is analyzed with the variations of injection pressure and load in a stratified-charge direct injection single cylinder gasoline engine.