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    • 6. 发明授权
    • Exhaust purification system of internal combustion engine
    • 内燃机排气净化系统
    • US08707681B2
    • 2014-04-29
    • US13259712
    • 2011-01-17
    • Yuki BisaijiKohei YoshidaMikio Inoue
    • Yuki BisaijiKohei YoshidaMikio Inoue
    • F01N3/00
    • F01N3/10F01N3/0814F01N3/0842F01N3/0885F01N3/2073F01N3/36F01N2430/06F01N2610/03F02D41/028
    • 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 NOx purification processing. When the stored SOx 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 SOx.
    • 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)内产生还原中间体。 该还原中间体用于NOx净化处理。 当从废气净化催化剂(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。