The effects of exhaust gas recirculation(EGR)on the combustion and particle emissions of a gasoline direct injection(GDI)engine in homogeneous or stratified combustion mode under lean burn condition were investigated by an EGR experiment on a GDI engine with a combination of wall-guiding spray and air-guiding spray.The results show that the adoption of EGR suppresses the cylinder combustion,reduces the peak values of cylinder pressure and instantaneous heat release rate,delays the combustion phase and incre...
作为最具经济效益的先进汽油机技术之一,汽油缸内直喷(gasoline direct injection,GDI)技术在降低燃油消耗率及低碳排放方面具有显著优势。一方面因为缸内直喷汽油的雾化吸热,使得GDI发动机比进气道喷射(port fuel injection,PFI)发动机拥有更为出色的抗爆性能,从而允许采用更?