Transmission input torque control apparatus

A transmission input torque control apparatus comprising:

• an engine configured to output an engine torque;
• a torque converter coupled to an output shaft of the engine, and configured to transmit the engine torque via oil and perform torque amplification;
• a motor generator that is coupled to an output shaft of the torque converter, and configured to operate as a motor that outputs a motor torque upon driving, and operate as a generator upon regeneration;
• an automatic transmission that is coupled to an output shaft of the motor generator, and configured to convert an inputted torque and output the converted torque;
• and
• a control unit configured to control the engine, the torque converter, the motor generator, and the automatic transmission, wherein
• the control unit is configured to
• when a predetermined learning condition is satisfied, cause the motor generator to perform a regenerative operation, detect an output torque of the torque converter from a regenerative electric power generation amount of the motor generator, and perform learning of, based on the output torque and an engine speed at a time of detection, a value of a transmission characteristic of the torque converter, and
• after the learning, estimate a torque to be inputted to the automatic transmission based on the learned value of the transmission characteristic of the torque converter and an engine speed in real time, and so control the engine that the estimated input torque does not exceed an upper limit value of an input allowable torque of the automatic transmission.