发明授权
- 专利标题： Exhaust emission control device
- 专利标题（中）： 废气排放控制装置
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申请号： US09941733申请日： 2001-08-30
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公开(公告)号： US07229596B2公开(公告)日： 2007-06-12
- 发明人: Hidetoshi Ito , Kimiyoshi Nishizawa , Ritsuo Sato
- 申请人： Hidetoshi Ito , Kimiyoshi Nishizawa , Ritsuo Sato
- 申请人地址： JP Yokohama
- 专利权人： Nissan Motor Co., Ltd.
- 当前专利权人： Nissan Motor Co., Ltd.
- 当前专利权人地址： JP Yokohama
- 代理机构： Foley & Lardner LLP
- 优先权： JP10-170239 19980617
- 主分类号： B01D53/94
- IPC分类号： B01D53/94 ; B01D53/72 ; B01D53/34
摘要：
The Rh content by percentage in an HC absorbent catalytic converter provided in an exhaust pipe is greater than the Rh content by percentage in an upstream three-way catalyst. In this way, even when HC which has been temporarily absorbed is emitted in an atmosphere and the exhaust gas becomes rich, the HC absorbent catalytic converter displays improved oxidization and removal of HC due to the high content by percentage of Rh which has a high HC conversion ratio in rich atmospheres. There is no necessity to control the air-fuel ratio to a strongly lean ratio and so HC removal can be improved while maintaining suppression of NOx emissions.
公开/授权文献
- US20020025281A1 Exhaust emission control device 公开/授权日：2002-02-28
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