TRANSMISSION INPUT TORQUE CONTROL APPARATUS

A transmission input torque control apparatus includes an engine, a torque converter, a motor generator, an automatic transmission, and a control unit. When a predetermined learning condition is satisfied, the control unit causes the motor generator to perform a regenerative operation, detects an output torque of the torque converter from a regenerative electric power generation amount of the motor generator, and performs learning of, based on the output torque and an engine speed at a time of detection, a value of “capacity coefficient×torque ratio” of the torque converter. After the learning, the control unit estimates a torque to be inputted to the automatic transmission based on the learned value of “capacity coefficient×torque ratio” and an engine speed in real time, and so controls the engine that the estimated input torque does not exceed an upper limit value of an input allowable torque of the automatic transmission.