2단 분사방식을 적용한 부분 예혼합 압축착화 디젤 엔진의 분사량비와 분사시기 변화가 연비 및 배기성능에 미치는 영향

Currently, due to the serious world-wide air pollution by substances emitted from vehicles, emission control is enforced more firmly and it is expected that the regulation requirements for emission will become more severe. A new concept combustion technology that can reduce the NOx and PM in relation to combustion is urgently required. As a core combustion technology among new combustion technologies for the next generation engine, the homogenous charge compression ignition (HCCI) is expanding its application range by adopting multiple combustion mode, catalyst, direct fuel injection and partially premixed compression ignition combustion using split injection method. This study used a split injection method in order to apply partially premixed compression ignition combustion method without significantly altering engine specifications in the aspect of multiple combustion mode and practicality by referring to the results of studies on the HCCI engine. And it is investigated that the effects of the ratio of injection fuel amount of split injection. From test results, the adequate combination of the ratio of the fuel amount and injection timing of the split injection method has some benefit on exhaust and fuel economy performance in a naturally aspirated single cylinder Diesel engine.