Exhaust gas purification device for engine
    2.
    发明授权
    Exhaust gas purification device for engine 失效
    发动机废气净化装置

    公开(公告)号:US07338642B2

    公开(公告)日:2008-03-04

    申请号:US10880532

    申请日:2004-07-01

    IPC分类号: B01D50/00 B01D53/43

    摘要: A main particulate filter having a relatively large volume is arranged in an exhaust passage of an engine, and an auxiliary particulate filter having a relatively small volume is arranged in the exhaust passage upstream of the main particulate filter. The main and auxiliary particulate filters are arranged so that the open downstream ends of the single open end-type exhaust gas passages of the auxiliary particulate filter and the open upstream ends of the open upstream end-type exhaust gas passages of the main particulate filter substantially face each other, and the open downstream ends of the both open end-type exhaust gas passages of the auxiliary particulate filter and the closed upstream ends of the open downstream end-type exhaust gas passages of the main particulate filter substantially face each other. A catalyst having an oxidation function is carried on the auxiliary particulate filter.

    摘要翻译: 具有较大体积的主要颗粒过滤器布置在发动机的排气通道中,并且具有相对较小体积的辅助颗粒过滤器布置在主颗粒过滤器上游的排气通道中。 主要和辅助颗粒过滤器布置成使得辅助颗粒过滤器的单个开放式排气通道的开放的下游端和主颗粒过滤器的开放的上游端排气通道的开放的上游端基本上 辅助颗粒过滤器的两个开口端排气通道的开放下游端和主颗粒过滤器的开放的下游端排气通道的封闭的上游端基本上彼此面对。 具有氧化功能的催化剂承载在辅助颗粒过滤器上。