AUTOMATIC TRANSMISSION EQUIPPED WITH FRICTION ELEMENT HAVING LOCKING MECHANISM ATTACHED THERETO, AND CONTROL METHOD THEREFOR
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United States of America Patent
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Issued Date -
Sep 10, 2015
app pub date -
Sep 9, 2013
filing date -
Sep 26, 2012
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Abstract
A transmission controller performs engagement processing, where a forward clutch is engaged and a lock mechanism is brought into a locked state by supplying an ON-pressure to an ON-pressure piston chamber and where the hydraulic pressure of the ON-pressure piston chamber is lowered, and supplies the ON-pressure to the ON-pressure piston chamber when the forward clutch slips even though the forward clutch has been engaged in the engagement processing, while a vehicle is traveling.
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