Jatco Corporation

Hiroki Kumashiro

Kenichi Mori

Kazutaka Adachi

Hiroki Iwasa

Masahiro Yamamoto

Masayuki Shimizu

Hiroyuki Ashizawa

Hideharu Yamamoto

Yukiyoshi Inuta

Midori Yamaguchi

Yutaka Kaneko

Ken Okahara

Kenichi Kaizu

Takurou Kawasumi

Hiroshi Sekiguchi

Ryuuichi Furukawa

The controller performs shift control of the transmission such that an actual pressure of a primary pressure becomes an indicating pressure. The controller includes a phase advance compensator which performs advance compensation of the indicating pressure, and a setting unit which sets an indicating pressure on which the advance compensation is performed by the phase advance compensator as the indicating pressure, in accordance with at least one of a rotation speed of a primary pulley, an input torque to a secondary pulley, a speed ratio, or a changing rate.

Control device of continuously variable transmission and control method of continuously variable transmission

An automatic transmissions control system varies times to start a shift to securing a good response in engagement pressure for an engagement-side frictional element as well as suppressing occurrence of hydraulic pressure vibrations at low temperatures. The control system has an engagement pressure at-low-temperature regulation section that selectively controls at least one of the first and second engagement-pressure regulator valves, when the oil temperature is detected to be lower than a predetermined oil temperature and the shift condition is determined to exist requiring a shift operation such that the first engagement-pressure regulator valve provides a maximum hydraulic pressure to engage the first frictional element to start a shift with the maximum hydraulic pressure being continuously provided until the shift ends, and/or the second engagement-pressure regulator valve provides a minimum hydraulic pressure to obtain complete disengagement of the second frictional element to start a downshift as the shift operation.

Automatic transmission control system

Growing community of inventors

Atsugi, Japan

Hiroki Kumashiro