采用燃烧器+氧化催化器的柴油机微粒捕集器复合再生控制策略的研究  

A Study on the Compound Regeneration Control Strategy for DPF Using Burner and DOC

作　　者：资新运[1] 郭猛超[2] 张伟[1] 姚广涛[1] 蔡强[1] 

机构地区：[1]军事交通学院汽车工程系,天津300161 [2]装甲兵工程学院机械工程系,北京100072

出　　处：《汽车工程》2010年第1期31-36,共6页Automotive Engineering

基　　金：国家863计划项目(2006AA060303);天津市自然科学基金项目(08JCYBJC13600)资助

摘　　要：设计了一种车载全流式燃烧器,从增压柴油机的涡轮增压器取出新鲜空气,从回油管路取油供给燃烧;将该装置安装在排气管尾端使捕集器进行再生,在燃烧器和捕集器之间增加氧化催化器,实现了在发动机所有稳态工况下捕集器的复合再生。在排气背压的再生控制策略基础上,根据经验公式对背压值进行温度修正,将三维背压MAP简化为二维,提出"恒温定时"的复合再生控制策略,分析了控制策略在不同工况区域的运用,给出了再生过程分析实例。对既定的控制策略进行了实车试验,结果表明微粒排放达到了国Ⅳ标准。An on-board full-flow burner is designed, which takes the fresh air from the turbocharger of diesel engine and the fuel from fuel return pipe of engine and is installed at the tail-end of exhaust pipe for regeneration of diesel particulate filter （DPF）. A diesel.oxidation catalyst （DOC） is added between burner and DPF to realize the compound regeneration of DPF in the whole range of stable work conditions of the engine. On the base of regeneration control strategy based on exhaust back pressure, its value is revised by temperature according to empirical equations, and the 3D back pressure MAP is simplified to 2D expression. A compound regeneration control strategy of ＇ constant temperature timing＇ is proposed, the implementation of control strategy in different working regions is discussed, and a real example of regeneration process analysis is given. A real vehicle test is conducted on the control strategy defined and the results show that emissions including particulate thoroughly meets national IV emission standard.

关 键 词：燃烧器 氧化催化器 柴油机 微粒捕集器 复合控制策略 

分 类 号：U464.172[机械工程—车辆工程]