협각인젝터를 이용한 HCCI 엔진의 분무 및 연소특성에 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. Early studies are shown that in a HCCI(Homogeneous Charge Compression Ignition) engine, the fuel injection time and spray angle affects the mixture formation and combustion. Thus the purpose of this study was to investigate relationship of combustion and mixture formation according to injection timing and fuel supply system using a narrow angle injector called the NADI(Narrow Angle Direct Injection). From this study, we found that the fuel injection timing and injection angle affect the mixture formations and in turn affects combustion in the PCCI engine.