发明授权
- 专利标题： Air-fuel ratio control system for internal combustion engines, having catalytic converter deterioration-detecting function
- 专利标题（中）： 具有催化转化器劣化检测功能的内燃机空燃比控制系统
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申请号： US183750申请日： 1994-01-21
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公开(公告)号： US5386695A公开(公告)日： 1995-02-07
- 发明人: Yoichi Iwata , Toshihiko Sato , Yasunari Seki , Tsuyoshi Takizawa , Takayoshi Nakayama
- 申请人： Yoichi Iwata , Toshihiko Sato , Yasunari Seki , Tsuyoshi Takizawa , Takayoshi Nakayama
- 申请人地址： JPX Tokyo
- 专利权人： Honda Giken Kogyo Kabushiki Kaisha
- 当前专利权人： Honda Giken Kogyo Kabushiki Kaisha
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX5-026286 19930121
- 主分类号： F01N3/20
- IPC分类号： F01N3/20 ; F01N11/00 ; F02D41/14 ; F02D41/22 ; F01N3/22
摘要：
An air-fuel ratio control system for an internal combustion engine having a catalytic converter arranged in the exhaust system, and first and second air-fuel ratio sensors arranged upstream and downstream of the catalytic converter respectively has an ECU which calculates an air-fuel ratio correction amount, based at least on an output from the first air-fuel ratio sensor, and detects deterioration of the catalytic converter, based on an output from the second air-fuel ratio sensor when the engine is in a predetermined operating condition. The ECU inhibits detection of deterioration of the catalytic converter when the air-fuel ratio correction amount falls outside a predetermined range.
公开/授权文献
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