Toyota Jidosha Kabushiki Kaisha

Aisin Aw Co., Ltd.

Masataka Hirano

Norihiro Tsukamoto

Hiromasa Takai

Tomohiro Asami

Keisuke Ota

Ayumu Sagawa

Daiki Fukuda

Tomohiro Chimbe

Takuma Sugino

A shift control device of a vehicle including an internal combustion engine and a multi-speed transmission in series, the shift control device comprises: a control portion providing a downshift control in which an input shaft rotation speed of the multi-speed transmission is increased through a torque-up of the internal combustion engine toward a post-shift input shaft rotation speed in a neutral state where a release-side engagement device to be released during a downshift of the multi-speed transmission is released, so as to engage an engagement-side engagement device to be engaged after the shift. In the case of a shift pattern having a large internal inertia of the multi-speed transmission, the control portion controls a torque capacity of the engagement-side engagement device to a value greater than zero before starting a torque-up control of the internal combustion engine.

Shift control device of vehicle

When there is a request for a skip downshift that transitionally establishes an intermediate speed position, a surge hydraulic pressure at the start of a torque phase during shift control toward the intermediate speed position is set so as to be lower than a surge hydraulic pressure at the start of a torque phase during shift control toward a required speed position.

Controller for automatic transmission

Growing community of inventors

Anjo, Japan

Masataka Hirano