가솔린기관의 연료분사 시기가 기관성능에 미치는 영향

In the sequential MPI system with one injection for each cycle, engine performance is influenced by the mixture conditions. It can be said that engine performance is improved by being better iden tical mixture formation conditions for all cylinders. As the fuel injection timing to the intake port effects on the mixture formation conditions and the engine performance, injection timing must be better adjusted to engine requirements. Engine behavior was clearly different depending on the injection time during intake stroke. Therefore it was studied that injection timing of fuel effects on the engine performance i. e. combustion stability, COV(imep), A/F excursion, CO, HC emission concentration and fuel consumption. It was found that late intake-synchronous injection was deteriorated the combustion characteristics and performance characteristics, while early intake-synchronous injection resulted in favorable engine behavior.