SPEED CHANGE CONTROLLER FOR AUTOMATIC TRANSMISSION

Japanese Patent JP3133151

B2

PURPOSE: To improve the shift feeling in the manual speed change mode by increasing the engagement pressure to a frictional engagement device larger than a stationary pressure for a prescribed time in up-shift, rewriting the prescribed time so that the difference between the time up to the start of inertia phase and the prescribed time becomes a prescribed value and utilizing the learned value in the next speed change.
CONSTITUTION: Accompanied with the execution of speed change, the engagement pressure supplied to a frictional engagement device is increased from the stationary pressure, and after the increass of pressure is continued for a prescribed time TA, the engagement pressure is returned to the stationary pressure. The time difference between the time Ti from the speed change instruction to the start of the inertia phase and the prescribed time TA is obtained, and the prescribed time TA is renewed on the basis of the difference, and the pressure increase control in speed change is carried out only for the successively renewed prescribed time TA. The start of inertia phase in the state where increase of pressure completes and return to the stationary pressure is generated is permitted by converging the time difference to a prescribed value, and a proper pressure increase period can be set. Accordingly, the speed change responsiveness can be improved, and the increase of the speed change shock can be prevented, at the same time.

Atsushi Tabata
Yasuo Hojo
Takeshi Inuzuka
Masashi Hattori

JP15945792A

February 05, 2001

June 18, 1992

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TOYOTA JIDOSHA KABUSHIKI KAISHA
Aisin AW Co., Ltd.

F16H61/06; (IPC1-7): F16H61/06

JP4107359A
JP63312558A
JP2163561A
JP483964A

Haruyuki Ikeda

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