Patent ID: 6811515
Filing Date: 2004-11-02
Classification: F16H,Y10S,Y10T

Abstract:
A control apparatus for an automatic transmission of a vehicle including a gear ratio calculating unit for controlling the automatic transmission to transfer an output of an engine of the vehicle to driven wheels, for changing a gear ratio, and for calculating the gear ratio, and a speed- change control unit for controlling the gear ratio based on a result of the calculation, comprising:a target driving torque generating unit for generating a value of a target driving torque based on an adaptation coefficient indicative of a vehicle running state and a vehicle speed, a driving torque calculating unit for calculating a value of driving torque based on the adaptation coefficient, vehicle speed and engine speed, a correcting unit for obtaining a correcting value for correcting the value of the target driving torque by deriving a difference between the driving torque calculated by said driving torque calculating unit and the target driving torque, and a gear-ratio-change-command unit for generating a gear-ratio-change-command based on the correcting value obtained by said correcting unit, and for commanding a change in the gear ratio, wherein said speed-change control unit changes the gear ratio based on the gear-ratio-change-command from the gear-ratio-change-command unit.