轻型柴油车排气后处理系统耐久性的研究  

A Study on the Durability of Emission After-treatment System for Light-duty Diesel Vehicles

作　　者：徐正飞[1] 张卫锋[1] 资新运[1] 何锦勇[1] 杜小东[1] 谭柏春[1] 

机构地区：[1]军事交通学院汽车工程系,天津300161

出　　处：《汽车工程》2012年第2期116-119,共4页Automotive Engineering

基　　金：国家高技术研究发展计划项目(2009AA064801B)资助

摘　　要：在北汽福田轻型柴油车上采用废气再循环+氧化催化器+微粒捕集器的降低柴油车排放技术路线,设计了一种燃油添加剂+起燃器+氧化催化器的微粒捕集器复合再生方案,进行了10万km耐久性试验。分析了微粒捕集器过滤效率变化规律和灰分对过滤体的影响;对比了发动机排放恶化和催化氧化剂老化对一氧化碳和碳氢化合物排放的影响;试验结果表明,催化氧化剂老化会导致排放超标,是系统应用主要难点。A technology roadmap of EGR＋DOC＋DPF for reducing diesel vehicle emission is adopted for a light-duty diesel vehicle of Foton.A compound regeneration scheme of FBC＋ burner ＋DOC for DPF is devised,and a 100,000 km durability test is conducted.The changing law of the filtration efficiency of DPF and the effects of ash on filter are analyzed and the effects of engine emission deterioration and DOC aging on CO and HC emissions are compared.The results of test show that the aging of DOC can lead to excess emission and is the bottleneck of system application.

关 键 词：微粒捕集器 氧化催化器 耐久性 排放 

分 类 号：U464.134.4[机械工程—车辆工程]