气门开启缸内喷射对改善PFI发动机PN排放研究

OVI Technology Research For PFI Engine PN Improvement

由于燃烧的一些不稳定因素,进气道喷射的汽油发动机都是在进气门开启之前进行然受喷射,然而通过系统性的研究和分析发现在一定条件下,利用进气门打开后进行缸内燃油喷射技术却可以改善PN的排放,这个发现具有一定的独创性和前瞻性,同时研究了不同时刻喷射对PN排放的具体影响,用具体的PN排放数据论证了该技术改善PN(颗粒的数量)排放的可行性和有效性.

PFI(port fuel injection)engine normally inject the fuel before the intake valve open due to the combustion concern,but it find OVI(open valve injection)technology will improve PN emission for PFI gasoline engine in specified condition after system analysis and research,this study is creative and advanced and study different injection timing contribution to PN,with real PN emission test result to prove feasibility and availability of OVI technology to improve the PN(Particle Number)emission.