Invention Grant
- Patent Title: Shift actuator valve having a pressure dead band
- Patent Title (中): 换档执行器阀具有压力死区
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Application No.: US12611669Application Date: 2009-11-03
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Publication No.: US08371552B2Publication Date: 2013-02-12
- Inventor: Philip C. Lundberg , Bret M. Olson
- Applicant: Philip C. Lundberg , Bret M. Olson
- 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: F16K31/122
- IPC: F16K31/122

Abstract:
A valve assembly having a pressure dead band includes a first valve or sleeve slidably disposed within a valve body. A second valve is partially slidably disposed within the first valve and partially slidably disposed in the valve body. A plurality of fluid passages communicate with the valve assembly and provide a first flow of hydraulic fluid and a second flow of hydraulic fluid. A lower threshold of the pressure dead band is defined by the pressure on the combination of the first area of the first valve and the first area of the second valve required to balance the resultant force developed on the second area of the second valve. An upper threshold of the pressure dead band is defined by the pressure on the first area of the second valve required to balance the resultant force developed on the second area of the second valve.
Public/Granted literature
- US20100148099A1 SHIFT ACTUATOR VALVE HAVING A PRESSURE DEAD BAND Public/Granted day:2010-06-17
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