发明授权
- 专利标题： Apparatus for detecting reduction of purifying capacity of catalyst for purifying exhaust gas from internal combustion engine and method thereof
- 专利标题（中）： 用于检测来自内燃机的净化废气的催化剂的净化能力的降低的装置及其方法
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申请号： US535641申请日： 1995-09-28
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公开(公告)号： US5743082A公开(公告)日： 1998-04-28
- 发明人: Takuya Matsumoto , Toru Hashimoto , Mitsuhiro Miyake , Hitoshi Kamura , Yasuhisa Yoshida
- 申请人： Takuya Matsumoto , Toru Hashimoto , Mitsuhiro Miyake , Hitoshi Kamura , Yasuhisa Yoshida
- 申请人地址： JPX Tokyo
- 专利权人： Mitsubishi Jidosha Kogyo Kabushiki Kaisha
- 当前专利权人： Mitsubishi Jidosha Kogyo Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX6-237431 19940930; JPX6-237432 19940930; JPX6-237433 19940930
- 主分类号： B01D53/86
- IPC分类号： B01D53/86 ; B01D53/94 ; F01N11/00 ; F01N3/20
摘要：
A detecting apparatus for a catalytic converter has a pair of O.sub.2 sensors, arranged individually on the up- and downstream sides of the converter, and an electronic control unit for discriminating reduction of the purifying capacity of a three-way catalyst in the converter. This unit discriminates the reduction of the purifying capacity in accordance with the comparison between a decision value and the ratio between the respective frequencies of outputs from the O.sub.2 sensors. In the case where the O.sub.2 sensor on the upstream side is subject to thermal degradation, its decision value is corrected, or the decision itself is interrupted.
公开/授权文献
- US5074594A Supermarket price tag system 公开/授权日：1991-12-24