发明名称 |
Discrete variable valve lift diagnostic control system |
摘要 |
A diagnostic control system for an internal combustion engine including a discrete variable valve lift (DVVL) system includes a first module that determines a knock threshold value based on engine operating parameters and an engine knock sensor that generates a knock signal. A second module monitors a portion of the knock signal that is associated with a particular cylinder of the engine, selectively identifies a fault of at least one valve of the DVVL system associated with the particular cylinder based on the portion and the knock threshold, and outputs a fault signal corresponding to the particular cylinder.
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申请公布号 |
US7444236(B2) |
申请公布日期 |
2008.10.28 |
申请号 |
US20070705188 |
申请日期 |
2007.02.09 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
WILES MATTHEW A. |
分类号 |
G06F19/00;F01L1/34;G01M15/00 |
主分类号 |
G06F19/00 |
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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