发明名称 |
Asymmetrical oxygen sensor diagnostic and degradation compensation systems |
摘要 |
A diagnostic system for an engine includes an oxygen detection module, a timing module and a control module. The oxygen detection module receives an oxygen signal from an oxygen sensor that detects an oxygen level in an exhaust system of the engine. The oxygen signal has N rich states and M lean states, where N and M are integers greater than or equal to 1. The timing module determines a rich period that the oxygen signal is in at least one of the N rich states and determines a lean period that the oxygen signal is in at least one of the M lean states. The control module detects an asymmetrical error with the oxygen sensor based on a comparison between the rich period and the lean period.
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申请公布号 |
US7769534(B1) |
申请公布日期 |
2010.08.03 |
申请号 |
US20090578063 |
申请日期 |
2009.10.13 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
XU YONG;WANG WENBO;WHITE VINCENT A.;CLUTZ RICHARD H.;MOENING DOUGLAS J. |
分类号 |
F02D41/14;F02D41/22 |
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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