SPEED-CHANGE CONTROLLER OF AUTOMATIC TRANSMISSION AND SPEED-CHANGE CONTROLLING METHOD

Japanese Patent JP2004019713

A

To enhance the responsiveness and suppress control shocks of speed change while making it correspond to the information on automatic transmission.

When an ECT (electronically controlled automatic transmission)_ECU (electronic control unit) detects an instruction (yes in the step S302) for a downshift, the ECT_ECU sets up the mode corresponding to given conditions in steps of decision time calculation processing (S400), time change rate calculation processing (S500) of oil pressure, and torque adjusting amount calculation processing (S600) if oil temperature is more than the predetermined temperature and an accelerator position change rate is more than the predetermined change rate. The ECT_ECU improves a speed-change responsiveness and suppress the shocks of speed change by performing the downshift (S310) on the basis of the decision time corresponding to the predetermined mode, the time change rate of oil pressure, and the torque adjusting amount.

TAKEBAYASHI NORITAKA
TAKANAMI YOJI
KOBIKI KOJI
ANDO MASAHIKO

JP2002172590A

January 22, 2004

June 13, 2002

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TOYOTA MOTOR CORP
AISIN AW CO

F16H61/04; F16H61/06; F16H59/20; (IPC1-7): F16H61/04

Kuro Fukami
Toshio Morita
Yoshihei Nakamura
Hidehiko Ito
Yutaka Horii
Morishita Hachiro

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