Invention Grant
- Patent Title: Method and apparatus to control logic valves for hydraulic flow control in an electro-mechanical transmission
- Patent Title (中): 控制机电传动中液压流量控制的逻辑阀的方法和装置
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Application No.: US12249342Application Date: 2008-10-10
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Publication No.: US08406945B2Publication Date: 2013-03-26
- Inventor: Jy-Jen F. Sah , Ali K Naqvi , Michael D. Foster
- Applicant: Jy-Jen F. Sah , Ali K Naqvi , Michael D. Foster
- Applicant Address: US MI Detroit DE Stuttgart US MI Auburn Hills DE Munich
- Assignee: GM Global Technology Operations LLC,Daimler AG,Chrysler Group LLC,Bayerische Motoren Werke Aktiengesellschaft
- Current Assignee: GM Global Technology Operations LLC,Daimler AG,Chrysler Group LLC,Bayerische Motoren Werke Aktiengesellschaft
- Current Assignee Address: US MI Detroit DE Stuttgart US MI Auburn Hills DE Munich
- Main IPC: B60L11/00
- IPC: B60L11/00 ; B60K6/20
Abstract:
A method for controlling an electromechanical transmission includes monitoring a current hydraulic circuit oil temperature, monitoring a current state of flow management valves, monitoring a command for cooling of electric machines, monitoring a desired transmission operating range state, utilizing a state machine to determine a sequence for controlling positions of the flow management valves to achieve the desired transmission operating range state based upon the monitored properties.
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