摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high response and high output electromagnetic drive-type flow control valve with a small and simple structure, and to provide a high pressure fuel supply pump with the same. <P>SOLUTION: The high pressure fuel supply pump includes a flange part with a suction surface formed in an anchor, a first peripheral surface part with a diameter smaller than that of the flange part, and a cylindrical nonmagnetic region opposed to the outer peripheral surface of the flange part with a third space held between them, and further includes a first fluid reservoir communicated with a back pressure chamber by the third space. In this structure, when the diameter of the flange part is expanded for expanding the cross section of the suction surface, a fuel pushed aside by the anchor is increased accordingly, however, a fuel passing through a fuel passage is not increased compared to a condition before expanding the diameter of the flange part since a part thereof is absorbed by the first fluid reservoir. This enables expansion of the cross section of the suction surface without expanding the fuel passage, and thus, prevents an increase in magnetic resistance that occurs in the fuel passage and improves suction force efficiently. <P>COPYRIGHT: (C)2011,JPO&INPIT |