Invention Grant
- Patent Title: Method and apparatus to control hydraulic pressure for component lubrication in an electro-mechanical transmission
- Patent Title (中): 控制机电传动装置中部件润滑液压的方法和装置
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Application No.: US12247317Application Date: 2008-10-08
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Publication No.: US07985154B2Publication Date: 2011-07-26
- Inventor: Kristin L Day , Jy-Jen F. Sah
- Applicant: Kristin L Day , Jy-Jen F. Sah
- Applicant Address: US MI Detroit
- Assignee: GM Global Technology Operations LLC
- Current Assignee: GM Global Technology Operations LLC
- Current Assignee Address: US MI Detroit
- Main IPC: F16H57/04
- IPC: F16H57/04 ; F01M11/10
Abstract:
A method for controlling hydraulic line pressure for component lubrication in a transmission includes monitoring a speed of an engine and an electric machine, determining a minimum line pressure required to lubricate the engine based upon the speed of the engine, determining a minimum line pressure required to lubricate the electric machine based upon the speed of the electric machine, controlling a minimum line pressure of a hydraulic control system to at least satisfy a larger value of the minimum line pressures.
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