Transmission hydraulic control system having a pump bypass valve
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United States of America Patent
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Mar 25, 2014
Grant Date -
Sep 1, 2011
app pub date -
Feb 26, 2010
filing date -
Feb 26, 2010
priority date (Note) -
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Abstract
A system for providing pressurized hydraulic fluid in a transmission of a motor vehicle includes a pump for providing pressurized hydraulic fluid having an inlet port and an outlet port. A bypass valve includes an inlet port in communication with the outlet port of the pump, a first outlet port in communication with the inlet port of the pump, and a second outlet port. The inlet port of the bypass valve is in communication with the second outlet port of the bypass valve when the bypass valve is in a first position and the inlet port of the bypass valve is in communication with the first outlet port of the bypass valve when the bypass valve is in a second position. A control device and accumulator are operatively associated with the bypass valve.
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