| 摘要 |
PROBLEM TO BE SOLVED: To improve discharge capacity controllability without increasing a size of a solenoid portion.SOLUTION: A valve element 70 has a pressure receiving area obtained by subtracting a pressure receiving area of a second pressure receiving face 72a of a second valve portion 72 from a pressure receiving area of a first pressure receiving face 71a of a first valve portion 71, and further has a third pressure receiving face 73a receiving a pressure of a control pressure chamber 35. A direction of a load based on the pressure of the control pressure chamber 35 acting on the third pressure receiving face 73a is the same as a direction of the load based on the pressure of the control pressure chamber 35 acting on the second pressure receiving face 72a. Thus, the pressure of the control pressure chamber 35 acting on the valve element 70 can be canceled on the basis of a relationship between the pressure receiving areas of the first pressure receiving face 71a, the second pressure receiving face 72a and a third pressure receiving face 73a, and the direction of the load based on the pressure of the control pressure chamber 35 acting respectively on the first pressure receiving face 71a, the second pressure receiving face 72a and the third pressure receiving face 73a.SELECTED DRAWING: Figure 2 |
