发明名称 |
Air-fuel ratio feedback control |
摘要 |
A method of controlling the air-fuel ratio of an internal combustion engine having an exhaust passage including a catalytic converter. The method includes providing a first air-fuel ratio sensor upstream of the catalytic converter, and providing a second air-fuel ratio sensor downstream of the catalytic converter. A control module having an input connected to the first and second air-fuel ratio sensors and an output connected to actuators for controlling the engine is also provided. This establishes a first feedback loop including the first air-fuel ratio sensor and a second feedback loop including the second air-fuel ratio sensor. The method further includes detecting an output value of the second air-fuel ratio indicative of a rich or lean exhaust gas air-fuel ratio. In response to the output value, the system monitors the engine mass airflow, and controls the duration of air-fuel ratio of the engine as a function of the engine mass airflow.
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申请公布号 |
US6253542(B1) |
申请公布日期 |
2001.07.03 |
申请号 |
US19990375351 |
申请日期 |
1999.08.17 |
申请人 |
FORD GLOBAL TECHNOLOGIES, INC. |
发明人 |
OMARA AHMED ABDELAZIZ;HAMBURG DOUGLAS RAY;BRADLEY JOHN EDWARD |
分类号 |
F02D41/14;(IPC1-7):F01N3/00 |
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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