- 专利标题： Exhaust gas purification apparatus for an internal combustion engine
- 专利标题（中）： 内燃机用废气净化装置
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申请号： US94799申请日： 1993-07-20
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公开(公告)号： US5402641A公开(公告)日： 1995-04-04
- 发明人: Kenji Katoh , Shinichi Takeshima , Toshiaki Tanaka , Satoshi Iguchi , Masato Goto , Tetsuro Kihara , Takamitsu Asanuma , Fumitada Murakami
- 申请人： Kenji Katoh , Shinichi Takeshima , Toshiaki Tanaka , Satoshi Iguchi , Masato Goto , Tetsuro Kihara , Takamitsu Asanuma , Fumitada Murakami
- 申请人地址： JPX Toyota
- 专利权人： Toyota Jidosha Kabushiki Kaisha
- 当前专利权人： Toyota Jidosha Kabushiki Kaisha
- 当前专利权人地址： JPX Toyota
- 优先权： JPX4-198224 19920724; JPX5-162778 19930630
- 主分类号： F01N3/08
- IPC分类号： F01N3/08 ; B01D53/04 ; B01D53/86 ; B01D53/94 ; F01N3/20 ; F01N3/24 ; F01N13/02 ; F02D41/02 ; F02D41/14 ; F02D45/00
摘要：
An NOx absorbent is installed in an exhaust conduit of an internal combustion engine capable of fuel combustion at lean air-fuel ratios. An oxygen concentration is repeatedly or continuously decreased by, for example, switching the air-fuel from the lean air-fuel ratio to a stoichiometric or rich air fuel ratio when the exhaust gas temperature is higher than 550.degree. C. or when NOx absorbent temperature is higher than 500.degree. C. As a result, the SOx absorbed in the NOx absorbent during lean air-fuel ratio, low temperature operation is released from the NOx absorbent, and the SOx-poisoned NOx absorbent is recovered.
公开/授权文献
- US4345414A Shaping process 公开/授权日：1982-08-24