Patent ID: 8718883

Claim:
A continuously variable transmission mounted in a vehicle to shift and transmit output rotation of a driving source, comprising: a variator which changes a speed ratio continuously; a stepped sub-transmission mechanism provided in series with the variator; a transmission control unit configured to select either one of an auto mode in which a final through speed ratio as a target value of an overall speed ratio of the variator and the sub-transmission mechanism is set based on a driving condition of the vehicle and the variator and the sub-transmission mechanism are controlled to realize the final through speed ratio, or a manual mode in which a gear position of the continuously variable transmission is selected based on an input operation from a driver, the final through speed ratio is set based on the selected gear position and the variator and the sub-transmission mechanism are controlled to realize the final through speed ratio; and a power ON/OFF determination unit configured to determine whether an input torque to the sub-transmission mechanism is positive or negative based on the input torque to the sub-transmission mechanism when the manual mode is selected.