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    • 5. 发明授权
    • Exhaust emission control device
    • 废气排放控制装置
    • US08347610B2
    • 2013-01-08
    • US12525689
    • 2008-02-21
    • Minoru Kowada
    • Minoru Kowada
    • F01N3/035
    • B01D53/9431B01D2251/2067B01D2257/702B01D2259/4591F01N3/021F01N3/035F01N3/2066F01N13/0097F01N13/08F01N2240/20F01N2470/00F01N2470/18F01N2610/02Y02T10/24
    • An exhaust emission control device has a particulate filter 5 and a selective reduction catalyst 6 arranged side by side. An S-shaped communication passage 9 is arranged for introduction of exhaust gas 3 from a rear end of the filter 5 to a front end of the adjacent catalyst 6 in a forward fold-back manner and with a urea water addition injector 11 arranged midway of the passage 9. In order to satisfactorily disperse the urea water with enhanced mixing with the exhaust gas 3 even if the flow rate is increased, slits 12 are formed in circumferentially spaced positions on a rear end of a mixing pipe 9B constituting an upstream portion of the communication passage 9 so as to introduce the exhaust gas 3. A downstream end 9a of a gas gathering chamber 9A is connected to the rear end of the mixing pipe 9B such that the slits 12 are encased and the rear end of the mixing pipe 9B is closed.
    • 废气排放控制装置具有并排配置的微粒过滤器5和选择还原催化剂6。 一个S形的连通通道9被布置成用于将尾气3从过滤器5的后端引导到相邻的催化剂6的前端,并以向前的折回方式引入,并且在尿素水添加注射器11的中间 为了令排气3与增压混合均匀地分散尿素水,即使流量增加,狭缝12形成在构成上游部分的混合管9B的后端的周向间隔位置 连通通道9以引入废气3.气体聚集室9A的下游端9a连接到混合管9B的后端,使得狭缝12被封装,并且混合管9B的后端 关闭了。