HCCI 용 인젝터를 사용한 디젤 연료의 분무 및 증발 특성에 관한 연구

Abstract

Recently, there has been an interest in premixed diesel engines as it has the potential of achieving a more homogeneous and leaner mixture close to TDC compared to conventional diesel engines because this concept reduced NOx and smoke simultaneously. Early studies are shown that in a HCCI(Homogeneous Charge Compression Ignition) engine, the fuel injection time and intake air temperature affects the mixture formations. Thus the purpose of this study was to investigate relationship of spray impingement and fuel evaporation characteristics according to injection time and injector angle in a common rail direct injection type HCCI engine using a early injection method called the PCCI (Premixed Charge Compression Ignition). From this study, we found that the impingement position and time according to the fuel injection time and injector angle are dominant over the fuel evaporation characteristic.