Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Kousuke Tanaka

Koichi Okuda

Kota Fujii

Kazuyuki Noda

Atsushi Tabata

Tooru Matsubara

Haruhisa Suzuki

Yoshimitsu Hyodo

Ryuji Ibaraki

Toshio Sugimura

Yuji Yasuda

Hideharu Nohara

Aito Ide

In a non-forward range, the same gear position as a forward first gear position is established in a stepped transmission. A hydraulic controller includes a second linear solenoid valve and third linear solenoid valve that respectively supply hydraulic pressure to a second clutch and first brake, and a selector valve that is provided in an oil passage upstream of the second and third linear solenoid valves and that switches between a state where hydraulic pressure is supplied to the oil passage and a state where supply of hydraulic pressure is cut off. When the non-forward range is set or when a vehicle is moving backward, the selector valve cuts off supply of hydraulic pressure to the oil passage. Thus, when there is a failure in the second or third linear solenoid valve, it is possible to suitably establish a gear position wherein the vehicle is not allowed to move backward.

Automatic transmission for vehicle

A hydraulic pressure control device of a vehicle driving device, the hydraulic pressure control device includes a range switcher having a first signal solenoid valve capable of supplying a first signal pressure and a spool switchable between a first position reached via the first signal pressure and a second position reached via a biasing force of a biasing member.

Hydraulic pressure control device of vehicle driving device

When a user performs an operation to switch from a forward range to a reverse range, an ECU switches an oil passage (referred to hereafter as a 'Bpressure supply source oil passage'), through which oil pressure is supplied to a brake, from a first oil passage to a second oil passage while engaging the same brake. At this time, in consideration of a response delay in the oil pressure in the second oil passage, the ECU switches the Bpressure supply source oil passage from the first oil passage to the second oil passage after a predetermined time &#x3b1; elapses from the point at which the user performs the forward-reverse switch operation (in other words, after waiting for the oil pressure in the second oil passage to reach a threshold pressure) rather than at the point at which the user performs the forward-reverse switch operation.

Oil pressure control device for automatic transmission

Growing community of inventors

Anjo, Japan

Kousuke Tanaka