Toyota Jidosha Kabushiki Kaisha

Ryota Takayanagi

Akiko Nishimine

Hiroaki Kimura

Takeshi Kuwahara

A downsized hydraulic system for a vehicle having a mechanical oil pump and an electric oil pump is provided. The hydraulic system comprises a first check valve allowing oil to flow only from the mechanical oil pump to an oil requiring site, and a second check valve allowing oil to flow only from the electric oil pump to an oil requiring site. The first check valve comprises a first port connected to an outlet of the mechanical oil pump, a second port connected to an outlet port of the second check valve, and a third port connected to the oil requiring site. The first check valve is adapted to provide a communication among those three ports by opening the first port, and provided with a through guide allowing the oil to flow between the second port and the third port even when the first port is closed.

Hydraulic system for vehicle

A power transmission device has a first check valve and a second check valve on the respective discharge passages. An oil temperature sensor is disposed at a position that is vertically lower than an oil-introducing portion of a merging section.

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Toyota, Japan

Ryota Takayanagi