发明名称 |
Air-fuel ratio control system for internal combustion engine |
摘要 |
An air-fuel ratio control system for an internal combustion engine having a catalyst (14a,14b) provided in an exhaust system of the engine for purifying exhaust gases and a first oxygen concentration sensor (17) disposed upstream of the catalyst is disclosed. The air-fuel ratio control system controls an air-fuel ratio of an air-fuel mixture supplied to the engine. A degree of response deterioration of the first oxygen concentration sensor is detected. A response delay of the first oxygen concentration sensor is compensated according to the detected degree of deterioration to calculate a compensated sensor output. The air-fuel ratio is controlled so that a detected air-fuel ratio calculated from the compensated sensor output coincides with a target air-fuel ratio. A frequency characteristic of the compensation is adjusted according to the detected degree of deterioration.
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申请公布号 |
EP1843026(A1) |
申请公布日期 |
2007.10.10 |
申请号 |
EP20070004946 |
申请日期 |
2007.03.09 |
申请人 |
HONDA MOTOR CO., LTD. |
发明人 |
IIDA, JUN;MAKI, HIDETAKA;SUEHIRO, YUKIO |
分类号 |
F02D41/14;F02D41/22;F02D45/00 |
主分类号 |
F02D41/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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