发明申请
US20100269575A1 DIAGNOSTIC SYSTEMS AND METHODS FOR VARIABLE LIFT MECHANISMS OF ENGINE SYSTEMS HAVING A CAMSHAFT DRIVEN FUEL PUMP
有权
具有CAMSHAFT驱动燃油泵的发动机系统的变动提升机构的诊断系统和方法
- 专利标题： DIAGNOSTIC SYSTEMS AND METHODS FOR VARIABLE LIFT MECHANISMS OF ENGINE SYSTEMS HAVING A CAMSHAFT DRIVEN FUEL PUMP
- 专利标题（中）： 具有CAMSHAFT驱动燃油泵的发动机系统的变动提升机构的诊断系统和方法
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申请号： US12429769申请日： 2009-04-24
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公开(公告)号： US20100269575A1公开(公告)日： 2010-10-28
- 发明人: Kenneth J. Cinpinski , Donovan L. Dibble
- 申请人： Kenneth J. Cinpinski , Donovan L. Dibble
- 申请人地址： US MI Detroit
- 专利权人： GM GLOBAL TECHNOLOGY OPERATIONS, INC.
- 当前专利权人： GM GLOBAL TECHNOLOGY OPERATIONS, INC.
- 当前专利权人地址： US MI Detroit
- 主分类号： G01M15/08
- IPC分类号： G01M15/08 ; G01M15/04
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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