Patent ID: 7819764

Claim:
A speed change control device for a continuously variable transmission in which a belt is wrapped around a primary pulley into which an output of a drive source is input and a secondary pulley which is connected to an output side of a drive system of a vehicle, and which changes a rotation speed of the drive source continuously and outputs the rotation speed by altering a groove width of the primary pulley and the secondary pulley, the device comprising: a speed change oil pressure control unit which controls an oil pressure for determining a speed ratio of the continuously variable transmission; a motor which drives a valve of the speed change oil pressure control unit; and a controller, wherein the controller detects a rotation speed of the primary pulley or the secondary pulley, and limits a driving speed of the motor based on a temperature of a working oil of the speed change oil pressure control unit and one or more of the speed ratio of the continuously variable transmission and the detected rotation speed, and the driving speed of the motor is limited to a lower speed as the temperature of the working oil falls outside of a predetermined temperature range, as the speed ratio shifts toward a low side, and as the detected rotation speed decreases.