HIGH PRESSURE FUEL PUMP

摘要

High pressure fuel pump includes a cylinder which is fitted in a concave portion formed in a pump housing and which defines a compression chamber of the pump and a plunger which pressurizes, by sliding against the cylinder, the fluid in the compression chamber. It is structured such that the fluid sucked into the compression chamber by reciprocating motion of the plunger is pressurized and is then discharged from the compression chamber. The cylinder is formed of a cylindrical member which has a ceiling portion and in which the compression chamber is partitionedly formed. A fuel suction path formed in the pump housing reaches the compression chamber through the cylinder and a fuel discharge path formed in the pump housing is connected to the compression chamber through the cylinder. The cylinder is pressed against the pump body by a fuel pressurizing force applied to the cylinder.

主权项

1. A high pressure fuel pump comprising:
a pump housing having a concave portion formed therein, a cylinder fitted in the concave portion of the pump housing and defining a compression chamber of the pump, and a plunger pressurizing, by sliding against the cylinder, fluid in the compression chamber, the fuel pump pressurizing fuel which is sucked into the compression chamber by reciprocating motion of the plunger, then discharging the fuel from the compression chamber, wherein the cylinder is formed of a cylindrical member which has a ceiling portion and in which the compression chamber is partitionedly formed, and wherein a fuel suction path formed in the pump housing reaches the compression chamber through the cylinder and a fuel discharge path formed in the pump housing is connected to the compression chamber through the cylinder.