Hydraulic control systems for dual clutch transmissions
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United States of America Patent
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Apr 30, 2013
Grant Date -
Mar 10, 2011
app pub date -
Sep 9, 2009
filing date -
Sep 9, 2009
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Hydraulic control systems for a dual clutch transmission include a regulated source of pressurized hydraulic fluid including an electric pump, a filter and an accumulator, a pair of pressure control valves and a branching hydraulic circuit including pressure or flow control valves, spool or logic valves and two position valves which collectively supply and exhaust hydraulic fluid from a plurality of shift actuators. The actuators are connected to shift rails which include shift forks and are slidable to engage synchronizers and positive clutches associated with the various gear ratios.
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