VEHICLE CONTROL DEVICE, AND VEHICLE CONTROL METHOD

摘要

PROBLEM TO BE SOLVED: To provide a vehicle control device having a continuously variable transmission which is enhanced in shift speed.SOLUTION: A vehicle control device for controlling a vehicle comprises a continuously variable transmission 1 having a primary pulley 2 having a second oil chamber 2d and a first oil chamber 2c communicating with a third oil chamber 3c of a secondary pulley 3. The vehicle control device also comprises: thrust ratio calculation means 6 which calculates a thrust ratio being a value which is obtained by dividing a primary thrust by a secondary thrust; instruction thrust ratio calculation means 6 which calculates an instruction thrust ratio that achieves a target speed ratio of the continuously variable transmission 1; and hydraulic pressure control means 6 which controls hydraulic pressure supply means 7 on the basis of the instruction thrust ratio. When the instruction thrust ratio is smaller than a lower limit thrust ratio which is set by dividing a pressure receiving area of the first oil chamber 2c by a pressure receiving area of the third oil chamber 3c, the hydraulic pressure control means 6 controls the hydraulic pressure supply means 7 so that a difference between the thrust ratio and the lower limit thrust ratio becomes large.