Toyota Jidosha Kabushiki Kaisha

Shun Minaki

Tomohiro Asami

Koji Oshima

Takahiro Kondo

Hiromichi Kimura

Akira Hino

Kazuaki Nakamura

Hiroki Takeda

Naoto Tanaka

Hiroya Fujiwara

Toshio Suzuki

Wataru Matsubara

Yoshisuke Kametani

Takashi Seo

Ken Jozaki

Makoto Nakayashiki

A control apparatus for a synchronous meshing mechanism that is equipped with a gear, a sleeve, a synchronizer ring, and a hydraulic actuator is provided. When it is determined that the sleeve and the gear have been rotationally synchronized with each other in an engagement transition period of the synchronous meshing mechanism, an electronic control unit with which the control apparatus is equipped sets a command pressure for the hydraulic actuator to an intermediate pressure that is lower than a meshing completion pressure. Besides, when meshing has not been completed even after the lapse of a predetermined time from a timing when the command pressure for the hydraulic actuator is set to the intermediate pressure, the electronic control unit sets the command pressure for the hydraulic actuator to the meshing completion pressure.

Control apparatus for synchronous meshing mechanism

Vehicle control device of vehicle including lockup clutch configured to directly couple between input/output rotating members of fluid power transmission device transmitting power of engine to automatic transmission, vehicle control device engaging lockup clutch when running state of vehicle in predetermined running state, vehicle control device providing lockup clutch pressure learning control of learning oil pressure of lockup clutch used in start-time lockup slip control in which lockup clutch placed in slip-engaged state toward engaged state at start of vehicle based on rotation speed of engine at time of engagement of lockup clutch, vehicle control device inhibiting engagement of lockup clutch when running state of vehicle in predetermined running state and also in second predetermined running state, vehicle control device engaging lockup clutch after running state of vehicle goes out of second predetermined running state, and providing lockup clutch pressure learning control in engaging process of lockup clutch.

Vehicle control device

An ECU executes a program including: a step of detecting a turbine revolution speed, a step of detecting an engine torque TE, a step of detecting a speed change ratio, a step of setting a range an enlarged slip region when a slip region enlargement condition is satisfied, and a step of enlarging the slip region toward a lock-up region side (high-load side).

Automatic gear control device

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.

'Threshold A is substituted in a power-on state, 'threshold B', which is lower than &#x201c;threshold A', is substituted in a power-off state, and &#x201c;threshold C&#x201d;, which is lower than &#x201c;threshold B&#x201d; is substituted during a brake operation, as a rapid deceleration determination threshold. The rotational speed of an output shaft of an automatic transmission and the rapid deceleration determination threshold are compared to determine whether a vehicle is rapidly decelerating. The engagement state of a lock-up clutch is controlled based on whether the vehicle is rapidly decelerating.

Control device and control method for automatic transmission

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Toyota, Japan

Shun Minaki