Apparatus for and method of controlling a dual clutch transmission
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United States of America Patent
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May 27, 2014
Grant Date -
Jun 7, 2012
app pub date -
Sep 9, 2011
filing date -
Dec 6, 2010
priority date (Note) -
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Abstract
The present invention provides a method of operating an electro-hydraulic control system for a dual clutch transmission having seven forward speeds or gear ratios and reverse. The control system includes an oil delivery subsystem, a clutch control subsystem and a synchronizer control subsystem. All three subsystems are under the control of a transmission control module. The method of operation includes gathering data from various shaft speed, clutch position and shift actuator position sensors and utilizing pressure control (PCS) and flow control (FCS) solenoid valves and a logic valve to pre-stage and engage (and disengage) hydraulic shift actuators associated with a requested and current gear and to sequentially engage one of a pair of input clutches.
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