发明授权
- 专利标题： Engine exhaust purification system
- 专利标题（中）： 发动机尾气净化系统
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申请号： US32058申请日： 1993-03-16
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公开(公告)号： US5337558A公开(公告)日： 1994-08-16
- 发明人: Kazunari Komatsu
- 申请人： Kazunari Komatsu
- 申请人地址： JPX Hiroshima
- 专利权人： Mazda Motor Corporation
- 当前专利权人： Mazda Motor Corporation
- 当前专利权人地址： JPX Hiroshima
- 优先权： JPX4-058251 19920316
- 主分类号： F01N3/00
- IPC分类号： F01N3/00 ; F01N3/20 ; F01N11/00 ; F02D35/00 ; F02D41/14 ; F02D45/00 ; F01N3/28
摘要：
An engine exhaust purification system is provided with a catalyst in an exhaust line, and oxygen sensors disposed in the exhaust line upstream and downstream from the catalyst, respectively. Deterioration of the catalyst is judged based on a frequency ratio of reversal of an output from the downstream oxygen sensor with respect to a threshold value to an output from the upstream oxygen sensor with respect to a threshold value. The threshold value of the deteriorated oxygen sensor is changed so as to vary the frequency ratio of reversal.
公开/授权文献
- US6006943A Cooking instrument with securable lid 公开/授权日：1999-12-28
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