Aisin Aw Co., Ltd.

Atsuya Ohshima

Shigeo Tsuzuki

Haruki Shirasaka

Mitsugi Yamashita

A vehicle drive unit is provided which includes a hydraulic circuit capable of efficiently supplying a hydraulic pressure from an accumulator to a hydraulic servo while minimizing the capacity of the accumulator. In a hydraulic circuit included in a continuously variable transmission, an accumulator is connected through an electromagnetic switch valve to an oil passage connecting a clutch pressure control valve and a manual valve, a one-way valve for allowing oil to flow only in the direction from the clutch pressure control valve toward the accumulator and the forward clutch is provided in the oil passage. The electromagnetic switch valve switches an oil passage to a communicating state when the oil pump is driven and switches the oil passage to a shut-off state when the oil pump is stopped.

Growing community of inventors

Okazaki, Japan

Atsuya Ohshima