- 专利标题: Exhaust purification system and catalyst regeneration method
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申请号: US15544849申请日: 2016-01-18
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公开(公告)号: US10570798B2公开(公告)日: 2020-02-25
- 发明人: Teruo Nakada , Takayuki Sakamoto , Daiji Nagaoka , Hiroyuki Yuza
- 申请人: ISUZU MOTORS LIMITED
- 申请人地址: JP Tokyo
- 专利权人: ISUZU MOTORS LIMITED
- 当前专利权人: ISUZU MOTORS LIMITED
- 当前专利权人地址: JP Tokyo
- 代理机构: Procopio, Cory, Hargreaves & Savitch LLP
- 优先权: JP2015-007988 20150119
- 国际申请: PCT/JP2016/051332 WO 20160118
- 国际公布: WO2016/117516 WO 20160728
- 主分类号: F01N3/00
- IPC分类号: F01N3/00 ; F01N3/02 ; F01N3/08 ; F01N3/20 ; F01N9/00 ; F02D41/02 ; F02D41/12 ; F01N3/36 ; B01D53/94 ; B01D53/96 ; F02D41/24 ; F02D41/00 ; F02D41/22 ; F02D41/14 ; F02D41/18 ; F02D41/04 ; F02D41/40
摘要:
There is provided: a NOx occlusion reduction-type catalyst that is provided in an exhaust passage of an internal combustion engine, occludes NOx in exhaust when the exhaust is in a lean state, and reduces and purifies the occluded NOx when the exhaust is in a rich state; an exhaust injector that is provided in the exhaust passage and is positioned further upstream than the NOx occlusion reduction-type catalyst; a NOx-purging control unit that performs NOx purging of reducing and purifying the NOx occluded in the NOx occlusion reduction-type catalyst by lowering the exhaust to a prescribed target lambda by fuel injection by the exhaust injector; and a NOx-purging-prohibition processing unit that inhibits performance of the NOx purging in a case where the exhaust cannot be lowered to the target lambda even if the fuel injection is performed at a maximum limit injection amount of the exhaust injector.
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