欧Ⅳ标准催化转换器的结构设计

将催化转换器安装在发动机排气歧管出口位置,可以使催化剂快速起燃,充分发挥某些配方的催化剂效能,这被执行欧III和欧IV排放标准的车辆广泛应用。从催化转换器布置的角度,介绍这种催化转换器的结构设计,比较了布置方案,并对催化转换器中的零件如进气端管、壳体总成、出气端锥以及封装方案的设计要点作了描述。论述了该型催化转换器的气体流动特性、温度分布和塑性应变分布。

The Structure Design ofEuro4 Standard Catalytic Converter

Assembly the catalytic converter in the exit of engine exhaust manifold,thus make the catalyst combust rapidly,and make full use of the catalyst efficiency,this method is applied widely to Euro3 and Euro4 emission standard vehicle.In view of layout of catalytic converter, introduce the design structure of this catalytic converter,compare the layout scheme,and describe the design critical point of catalytic converter parts such as inlet end pipe,housing assembly,outlet end cone and package scheme.Discuss the gas flow characteristics,temperature distribution and plastic strain distribution of this catalytic converter part.