Jatco Corporation

Naohiro Hoshi

Hideshi Wakayama

Hiroyasu Tanaka

Tetsuya Izumi

Kwang-ho Lee

Koji Dohi

Katsumi Doihara

Hironori Nihei

Seiji Kasahara

Seonjae Kim

Azusa Shimoda

Tatsuya Ozone

Shoichi Sekiguchi

Hideaki Sasaki

Toshio Saitou

Kwang-Ho Lee

A vehicle control device for controlling a vehicle with a drive source, a friction transmission mechanism provided between the drive source and drive wheels and a fluid transmission mechanism provided between the friction transmission mechanism and the drive source includes a suppression unit configured to suppress a decrease of a speed ratio of the fluid transmission mechanism if the speed ratio becomes negative when the vehicle starts.

Vehicle control device and vehicle control method

A positional deviation ERRstep of a step motoris calculated on the basis of a reference model step StepMdl, an actual speed ratio-corresponding step Bstep, and an added value obtained by adding together a target deviation GTstep, calculated in accordance with a transmission input torque Ti, and a starting learned value Gstep. When the transmission input torque Ti is large, the target deviation GTstep is increased in accordance with the transmission input torque Ti. A line pressure PL is then controlled on the basis of the positional deviation ERRstep obtained as a result.

Continuously variable transmission and control method thereof

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

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Atsugi, Japan

Naohiro Hoshi