发明名称 |
DIAGNOSTIC SYSTEMS AND METHODS FOR VARIABLE LIFT MECHANISMS OF ENGINE SYSTEMS HAVING A CAMSHAFT DRIVEN FUEL PUMP |
摘要 |
A lift mechanism diagnostic system comprises a fuel pump disabling module, a pressure module, and a diagnostic module. The fuel pump disabling module selectively disables a fuel pump that is driven by a camshaft. The pressure module determines a first pressure of fluid provided to a variable valve lift mechanism when the variable valve lift mechanism is operated in a first lift mode while the fuel pump is disabled and determines a second pressure of the fluid when the variable valve lift mechanism is operated in a second lift mode while the fuel pump is disabled. The diagnostic module selectively diagnoses a fault in the variable valve lift mechanism based on the first and second pressures.
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申请公布号 |
US2010269575(A1) |
申请公布日期 |
2010.10.28 |
申请号 |
US20090429769 |
申请日期 |
2009.04.24 |
申请人 |
GM GLOBAL TECHNOLOGY OPERATIONS, INC. |
发明人 |
CINPINSKI KENNETH J.;DIBBLE DONOVAN L. |
分类号 |
G01M15/08;G01M15/04 |
主分类号 |
G01M15/08 |
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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