轻型柴油车排气系统欧5升级试验研究

摘要

Fine Particles PM2.5 can do harm to people's health,so the sources of PM2.5 should be controlled.Motor vehicles can give out waste gas,PM2.5 and PM10 etc.In order to meet the Euro 5,light-duty diesel vehicles have two roads to choose:one is using SCR to control NOx,the other is using EGR + DPF to control PM.To control PM 2.5,EGR + DPF is used in the study.For the D&R aim,the light-duty diesel vehicle test cycle that is based on engine bench test is simulated.And three types of DPF(AC-DPF,SiC-DPF and AT-DPF) are compared on engine bench test.The test show that SiC-DPF can purify more PM than the others,and it can deliver more fuel economy.%因PM2.5对阴霾天气贡献较大,在机动车的排放控制策略中应有所侧重.轻型柴油车在升级欧5的过程中,国内有两种路线:一种是SCR路线,另一种是DPF路线.就控制颗粒物排放来说,DPF路线的贡献更大.故在进行轻型柴油车排气系统欧5升级时,采用了EGR+ DPF路线.基于开发研究的考量,用台架试验来模拟替代了轻型车测试循环.并对不同的DPF—堇青石DPF(AC-DPF)、碳化硅DPF(SiC-DPF)和钛酸铝DPF(AT-DPF)进行了对比试验分析.结果表明,SiC-DPF净化PM的性能和比油耗更好一些.