| 摘要 |
PROBLEM TO BE SOLVED: To provide a hydraulic control device which improves the fuel economy of a vehicle by suppressing loss torque caused by slide resistance between a vane and a cam ring, suppresses wear generated by slide movement of the vane and a cam surface, and enhances the durability of the vane pump.SOLUTION: In a hydraulic control device 10, since the hydraulic pressure of a second discharge port 28 connected to a second discharge oil passage 60 which is reduced in pressure to be lower than the hydraulic pressure of a first discharge oil passage 58 connected to a first discharge port 26 is supplied to a vane as back pressure for pressing an outside end of a rotor of the vane in a radial direction to an internal peripheral cam face through a second back pressure groove 32, pressing force to the internal peripheral cam face of the vane which partitions pump chambers P between a second intake port 24 and the second discharge port 28 is reduced when a vane pump 14 is operated at a high speed. |
