发明授权
- 专利标题： Oxygen concentration sensor abnormality-detecting system for internal combustion engines
- 专利标题（中）： 内燃机氧浓度传感器异常检测系统
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申请号： US09150207申请日： 1998-09-09
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公开(公告)号： US06176080B1公开(公告)日： 2001-01-23
- 发明人: Atsushi Izumiura , Akira Murakami , Hirohisa Kitaura , Seiichi Hosogai , Shigeo Hidai
- 申请人： Atsushi Izumiura , Akira Murakami , Hirohisa Kitaura , Seiichi Hosogai , Shigeo Hidai
- 优先权： JP9-261127 19970910
- 主分类号： F01N300
- IPC分类号： F01N300
摘要：
An oxygen concentration sensor abnormality-detecting system is provided for an internal combustion engine having first and second oxygen concentration sensors arranged in the exhaust system upstream and downstream of a catalytic converter therein. An ECU determines that the first oxygen concentration sensor is functioning abnormally if an output from the first oxygen concentration sensor does not change when an output from the second oxygen concentration sensor changes.