직분식 예혼합 압축착화 디젤엔진의 연소변동 및 배기 특성

Abstract

This study was carried out to investigate the characteristics of combustion and exhaust emission for operating conditions in a direct injection type of Homogeneous Charge Compression Ignition(HCCI) engines such as supercharged and naturally aspirated using diesel fuel and additive. From the experimental result. we found that cool name was appeared in HCCI combustion and cool flame has influence on hot name. Also at lean air-fuel ratio and high speed range, it was observed that charge air pressure or increasing intake air temperature is effective to increase combustion performance and reduce of exhaust emission. we concluded that chemical reaction by the increasing intake air temperature or additive without physical improving by fuel atomization and vaporization has limitation for reduction of exhaust emission.