Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Tetsuya Yamamoto

Kenichi Tsuchida

Yoshinobu Soga

Toshiaki Hayashi

Hiromitsu Nitani

Takafumi Inagaki

Shuji Moriyama

Takahiro Kokubu

Koji Makino

Yusuke Ohgata

Yuta Seriguchi

Syuji Moriyama

Yoichiro Kimura

Daiki Koyama

A hydraulic control unit of a vehicle drive system including an automatic transmission, and an oil pump device, includes: a first electromagnetic valve; a second electromagnetic valve; first and second oil passages; a third oil passage; a manual valve operated to connect and disconnect the first and third oil passages and a drain oil passage to and from each other, in response to an operation of a manually operated shifting device by a vehicle operator, such that the first oil passage is connected to the third oil passage when the shifting device is placed in a first operating position, while the first oil passage is connected to the drain oil passage when the shifting device is placed in a second operating position; an accumulator connected to the first oil passage; and a check valve provided in the second oil passage.

Hydraulic control unit of vehicle drive system

A hydraulic control device includes: a pressure regulation valve that regulates a hydraulic pressure of oil supplied from an oil pump; a discharge oil passage through which the oil discharged from a fluid coupling flows when a lockup clutch is disengaged; a lubrication oil passage that supplies the oil from the discharge oil passage to a location to be lubricated; a return oil passage that returns the oil drained from the pressure regulation valve to a suction port of the oil pump; a connection oil passage that connects the lubrication oil passage and the return oil passage; and a flow direction regulation valve that is provided in the connection oil passage.

Hydraulic control device

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Toyota, Japan

Tetsuya Yamamoto