| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a pressure control valve capable of maintaining performance of a pressure holding valve by enhancement of resistance to foreign substances. <P>SOLUTION: A relief valve 30 is provided in a return flow passage 14 that connects a fuel flow passage of a high-pressure side and a fuel flow passage of a low-pressure side of a high-pressure pump 20. The relief valve 30 is opened when a fuel pressure of a fuel flow passage on the high-pressure side becomes equal to or greater than a first pressure. In this case, a first valve body of the relief valve 30 abuts against a stopper, restricting the movement in a valve-opening direction. A pressure holding valve 40 provided inside the first valve body is opened when the fuel pressure of the fuel flow passage on the high-pressure side becomes equal to or greater than a second pressure. When the relief valve 30 is opened, and the first valve body collides with the stopper collide, a lift amount of the second valve body is increased by an inertia force corresponding to a mass of a second valve body of the pressure holding valve 40, and foreign substances contained in the fuel adhered and deposited onto the second valve body are removed. <P>COPYRIGHT: (C)2011,JPO&INPIT |
