Toyota Jidosha Kabushiki Kaisha

Makoto Nakayashiki

Tooru Matsubara

Yoshio Hasegawa

Tomohiro Asami

Kazuyuki Watanabe

Yoshikazu Tanaka

Takahiro Sakai

Takahiro Kondo

Shun Minaki

An ECU executes a program including determining whether a mode is a neutral control execution mode, determining whether the mode is a neutral control return mode, detecting a proceeding state of the neutral control return mode when an accelerator is activated during the neutral control return mode, and inhibiting slip start when the mode is in an initial stage of the neutral control return mode.

Automatic gear control device

The temperature of a friction engagement device of an automatic transmission is estimated, and the target speed ratio of a torque converter increases as the estimated temperature of the friction engagement device increases. The engagement load of the friction engagement device is then controlled so as to achieve the increased target speed ratio of the torque converter.

Neutral control apparatus and method for a vehicle with an automatic transmission

A control apparatus for a vehicular automatic transmission includes a control portion that executes a neutral control in which the control portion places the automatic transmission in a neutral state by reducing an application load on a frictional apply device inside the automatic transmission when the vehicle is stopped. The control portion ends the neutral control when a torque transmitted to the frictional apply device has been continually equal to, or greater than, a predetermined value for a consecutive predetermined of time. As a result, by considering the torque transmitted to the frictional apply device in addition to the continuation time of the neutral control, it is possible to more precisely grasp the state of the frictional apply device. In other words, it is possible to execute, as quickly as possible, neutral control for an extended period of time while ensuring durability of the frictional apply device.

Control apparatus and method for vehicular automatic transmission

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Nishikamo-gun, Japan

Makoto Nakayashiki