Influence of multiple pre-injection on engine performance based on exhaust gas control

With the development of society, emission laws are increasingly strict, and EGR multiple pre-injection strategy can effectively reduce emissions. In order to study influence rate on performance engine, a computational fluid dynamics (CFD) simulation model was established based GT power. By changing rate, number amount pre-injection, best technology coupling point is explored. The results show that generation NOx, but it will lead increase soot production decrease power; improve trade-off relationship between NOx