Patent ID: 8262376
Filing Date: 2012-09-11
Classification: F04B

Abstract:
1. A high-pressure pump comprising: a press-side passage fluidly connecting a fuel gallery which has a fuel inlet at a bottom thereof and a compression chamber in which fuel is compressed; a plunger for varying a volume of the compression chamber and defining a variable volume chamber of which a volume thereof is varied along with a variation in the volume of the compression chamber; a volume-chamber passage fluidly connecting the variable volume chamber and the fuel gallery; a damper unit provided in the fuel gallery for restricting a variation in a fuel pressure in the fuel gallery; and a lid member for closing the fuel gallery while biasing the damper unit through an elastic member; wherein the press-side passage is configured in such a manner that a main stream of a fuel flow, which is returned from the compression chamber to the fuel gallery by the plunger, flows toward the lid member which is opposed to the fuel inlet, the press-side passage is configured such that a supposed extended passage thereof extends to the lid member in the fuel gallery, and a bottom-side fringe of the damper unit is positioned outside of the supposed extended passage of the press-side passage.