EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE
    37.
    发明公开
    EXHAUST PURIFICATION DEVICE FOR INTERNAL COMBUSTION ENGINE 有权
    ABGASREINIGERFÜREINEN VERBRENNUNGSMOTOR

    公开(公告)号:EP2541009A4

    公开(公告)日:2014-10-08

    申请号:EP11758074

    申请日:2011-01-17

    摘要: In an internal combustion engine, inside an engine exhaust passage, a hydrocarbon feed valve (15) an exhaust purification catalyst (13), and a particulate filter (14) are arranged. If the hydrocarbon feed valve (15) feeds hydrocarbons by a period of within 5 seconds, a reducing intermediate is produced inside the exhaust purification catalyst (13). This reducing intermediate is used for NO x purification processing. When the stored SO x should be released from the exhaust purification catalyst (13), the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) is made rich, the reducing intermediate built up on the exhaust purification catalyst (13) is made to be desorbed in the form of ammonia, and the desorbed ammonia is used to make the exhaust purification catalyst (13) release the stored SO x .

    摘要翻译: 在内燃机中,在发动机排气通路内设置有碳氢化合物供给阀(15),排气净化催化剂(13)和微粒过滤器(14)。 如果烃进料阀(15)在5秒钟内进料烃,则在排气净化催化剂(13)内部产生还原中间体。 该还原中间体用于NO x净化处理。 当从排气净化催化剂(13)中释放储存的SO x时,流入排气净化催化剂(13)的废气的空燃比变浓,在废气净化催化剂( 13)以氨的形式解吸,并且使用解吸的氨来使排气净化催化剂(13)释放储存的SO x。