Patent ID: 6849030

Claim:
A hydraulic pressure control device for a continuously variable transmission for a vehicle, the transmission varying a speed ratio at a speed change rate corresponding to a hydraulic pressure, comprising: a sensor which detects a vehicle speed; a hydraulic pressure regulating unit which varies the hydraulic pressure supplied to the transmission; and a programmable controller programmed to: calculate a target speed change rate according to a predetermined speed change schedule in which the speed ratio varies in an up-shift direction as the vehicle speed increases; determine after the vehicle has started to move whether or not a specified condition holds; cause the hydraulic pressure regulating unit, when the specified condition holds, to supply a hydraulic pressure corresponding to the target speed change rate to the transmission; and cause the hydraulic pressure regulating unit, when the specified condition does not hold, to supply a hydraulic pressure corresponding to a target start-up speed change rate which is larger than the target speed change rate, to the transmission.