Patent ID: 7806791

Claim:
A continuously variable transmission, comprising: an input side primary pulley having a groove width which varies according to an oil pressure; an output side secondary pulley having a groove width which varies according to an oil pressure; a belt wrapped around the primary pulley and the secondary pulley, a pulley-contacting radius of which varies according to groove width; an actuator which varies the oil pressure of the primary pulley according to a driving condition; and a controller, which: calculates a reference model operating position, which is an operating position of the actuator corresponding to a target speed ratio; calculates an actual operating position of the actuator from an actual speed ratio between the primary pulley and the secondary pulley; calculates a primary pulley input torque; calculates an actuator operating position deviation correction amount which helps to correct a deviation between the reference model operating position and the actual operating position when the primary pulley input torque is on a high torque side to be larger than the actuator operating position deviation correction amount when the primary pulley input torque is on a low torque side; and controls a line pressure, which serves as a source pressure of the oil pressure of the primary pulley and the oil pressure of the secondary pulley, on a basis of the reference model operating position, the actual operating position, and the actuator operating position deviation correction amount.