| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high-pressure pump in which the drive performance of an electromagnetic drive part for controlling a discharge rate is improved. <P>SOLUTION: A housing body 11 includes a pressurization chamber 113 for pressurizing fuel, and a fuel passage 100 for leading fuel to the pressurization chamber 113. A valve member 40 shuts off and allows fuel flow in the fuel passage 100 by seating on and leaving from a valve seat 34 of a valve body 30 provided in the fuel passage 100. A stopper 50 regulates the movement of the valve member 40 in the valve opening direction by abutting on the valve member 40. The outer diameter of the surface in which a contact part with the stopper is formed in the valve member 40 is smaller than the outer diameter of the surface in which a contact part with the valve member is formed in the stopper 50. Therefore, the stopper 50 inhibits the dynamic pressure of the fuel flow from acting on the valve member 40. Accordingly, the load of a second spring 22 for biasing the valve member 40 in the valve opening direction can be minimized, and the electric current value necessary for the operation of the electromagnetic drive part 70 can be reduced. <P>COPYRIGHT: (C)2013,JPO&INPIT |
