Jatco Corporation

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Azusa Shimoda

Noritaka Aoyama

Hiroyasu Tanaka

Hideshi Wakayama

Masataka Ohtsuka

Koji Dohi

Tomoaki Kabe

Katsumi Doihara

Nobuhiko Morifuji

Yuki Ono

Mitsuki Ishizuka

Yukinobu Sakakibara

Ken Hirashita

Naohiro Hoshi

Tatsuya Ozone

Shoichi Sekiguchi

Hideaki Sasaki

Toshio Saitou

Hiromasa Masuda

A transmission control device controls a CVT installed in a vehicle. The device has, as modes for the CVT, a CVT mode Mfor changing a transmission gear ratio steplessly based on the operating state of the vehicle, and a stepped transmission mode Mfor changing the transmission gear ratio stepwise based on the operating state of the vehicle. The device includes a transmission mode switching control unit (controller)for controlling switching between the CVT mode Mand the stepped transmission mode Mbased on an actual accelerator opening. The transmission mode switching control unit (controller)performs switching from the CVT mode Mto the stepped transmission mode M, if the actual accelerator opening reaches or exceeds a first threshold value Tset in a plurality of stages so as to increase stepwise in accordance with an increase in a vehicle speed.

Transmission control device

There is provided with an automatic transmission () having a clutch () and a brake device () which holds a brake force during a stop of an engine (). There is provided with an engine control section () which performs an automatic stop of the engine and a re-start of the engine and a release control section () which releases a holding of the brake force during the re-start of the engine. The release control section () releases the holding of the brake force when an engagement state of the clutch () is a predetermined state in case where an accelerator off state occurs until the engagement state of the clutch () becomes the predetermined state and releases the holding of the brake force when the engagement state of the clutch () is an engagement state weaker than the predetermined state, during a re-start of the engine ().

Vehicle control apparatus

A hydraulic pressure control device is provided that that controls hydraulic pressure of a clutch supplying torque to a continuously variable transmission while the vehicle is stopped and in a running range. The hydraulic pressure control device has an control section that estimates a clutch engagement hydraulic pressure for changing the clutch from an engaged state to a disengaged state based the hydraulic fluid pressure acting on the clutch during the stopping of the rotational movement of a primary pulley of the continuously variable transmission, and then controls regulation of the hydraulic pressure to the clutch from an engaged state to a disengaged state, when the vehicle is stopped and in the running range, so that the torque from the engine does not rotate a secondary pulley of the continuously variable transmission.

Hydraulic pressure control device for continuously variable transmission

In shift control apparatus and method for a belt-type continuously variable transmission, a shift ratio between the primary pulley and the secondary pulley is controlled, a shift speed is detected, the shift speed being a variation quantity of the shift ratio per unit of time; and an advance of the shift ratio control is suppressed to suppress the shift speed when a magnitude of the shift speed is equal to or larger than a predetermined value and a suppression quantity is set to suppress the advance of the shift ratio control so as to suppress the shift speed.

Shift control apparatus and method for belt type continuously variable transmission

Growing community of inventors

Okazaki, Japan

Azusa Shimoda