| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-pressure pump in which the drive performance of an electromagnetic drive part for controlling a discharge amount is improved.SOLUTION: A housing body 11 includes a pressurization chamber 113 for pressurizing fuel and a fuel passage 100 for introducing the fuel to the pressurization chamber 113. A valve member 40 shuts off and allows a fuel flow in the fuel passage 100 by getting seated on and leaving from a valve seat 34 of a valve body 30 provided in the fuel passage 100. A stopper 50 regulates movement of the valve member 40 in a valve opening direction by contacting with the valve member 40. The outer diameter of a surface of the valve member 40 where a contact part with the stopper is formed is smaller than the outer diameter of a surface of the stopper 50 where a contact part with the valve member is formed. Thus, the stopper 50 inhibits the dynamic pressure of the fuel flow from acting on the valve member 40. Accordingly, an electric current value required to operate an electromagnetic drive part 70 can be reduced, wherein the electromagnetic drive part generates a magnetomotive force to move the valve member 40 in the valve opening direction. |
