Patent ID: 6059547
Filing Date: 2000-05-09
Classification: F02M

Abstract:
A cylinder injection high-pressure fuel pump having: a casing in which an inlet passage for taking in fuel and a discharge passage for discharging fuel are formed, a cylinder formed in said casing, a fuel pressurizing chamber formed in a part of said cylinder, and a plunger disposed in said cylinder so that it may reciprocate therein; wherein the reciprocating motion of said plunger causes the fuel to be taken through said inlet passage into said fuel pressurizing chamber where it is pressurized, and the pressurized fuel is discharged through said discharge passage and forcibly fed to a fuel injector of a cylinder injection engine;said cylinder injection high-pressure fuel pump comprising a low-pressure-end pulsation absorber which has a capacity chamber formed by enlarging a part of said inlet passage, and a sealed vessel which is housed in said capacity chamber and which has a gas hermetically sealed in said sealed vessel to change a volume of said sealed vessel according to a change in a pressure of said capacity chamber.