内燃机工程2017，Vol.38Issue(1)：7-11,5.DOI:10.13949/j.cnki.nrjgc.2017.01.002
重型柴油机欧Ⅵ后处理系统构型方案试验研究
Experimental Study of Aftertreatment System Configurations for Euro Ⅵ Heavy-Duty Diesel Engines
摘要
Abstract
Taking diesel oxidation catalyst (DOC), catalyzed diesel particulate filter (CDPF), selective catalytic reduction (SCR) catalyst, and ammonia slip catalyst (ASC) as objects, the performances of DOC-CDPF-SCR-ASC and DOC-SCR-CDPF aftertreatment system configurations were compared on an engine test bench with several test cycles, including NOx conversion efficiency, NH3 slip, N2O emission, particle mass (PM) and particle number (PN) emission, and CDPF passive regeneration.The results show that these two kinds of configurations almost have the same effect of PM and PN emission reduction.The DOC-CDPF-SCR-ASC configuration has a better NOx conversion efficiency and CDPF passive regeneration performance.For this configuration, the CDPF has a regulating effect on the NO2/NOx ratio at the inlet of the SCR catalyst, which can improve the SCR conversion efficiency, and the mean temperature of the SCR catalyst of this configuration is very close to that of the DOC-SCR-CDPF configuration due to the heat release of passive regeneration and NO oxidation in the CDPF.For the DOC-SCR-CDPF configuration, the CDPF can play a role of ASC and lead a lower NH3 slip, but it will produce a certain amount of NO2 and N2O emission.关键词
内燃机/重型柴油机/后处理系统构型/氮氧化物/颗粒物Key words
IC engine/heavy-duty diesel engine/aftertreatment system configuration/NOx/particulate matter分类
能源科技引用本文复制引用
张俊,唐韬,曹东晓,帅石金,胡静..重型柴油机欧Ⅵ后处理系统构型方案试验研究[J].内燃机工程,2017,38(1):7-11,5.基金项目
国家"八六三"高技术研究发展计划项目(2013AA065304) （2013AA065304）
