| 摘要 |
PROBLEM TO BE SOLVED: To control an oil pressure so that an engine after temporarily being stopped may be smoothly restarted in a vehicle equipped with a belt-type continuously variable transmission.SOLUTION: In this hydraulic control device, a belt is wound to a pair of pulleys, a first hydraulic chamber narrowed in groove width by being supplied with the pressure oil is arranged at one of the pulleys, a second hydraulic chamber which generates a belt-sandwiching pressure corresponding to the supplied oil pressure is arranged at the other pulley, and the oil pressure generated by a hydraulic pump driven by a power source which is temporarily and automatically stopped is supplied to each hydraulic chamber. A shutoff valve which shuts off an oil passage is arranged in the oil passage which supplies the oil pressure to the second hydraulic chamber. The hydraulic control device also comprises a shutoff valve control means (step S5) which accumulates a pressure in the second hydraulic chamber by closing the shutoff valve in a state that the oil pressure of the second hydraulic chamber is raised to a preset oil pressure when the power source is temporarily and automatically stopped. |
