Patent ID: 6152113
Filing Date: 2000-11-28
Classification: F02M

Abstract:
A high-pressure fuel injector of a diesel engine for supplying fuel from a fuel pump to a combustion chamber, comprising:a nozzle body having a top end, the nozzle body comprising,a cavity in a central region of the nozzle body,a fuel feeding passage at a side of the cavity for receiving fuel firstly pressurized by the fuel pump, the fuel feeding passage having an outlet port opened to the cavity at a first height, andan injection passage having a port opened to the cavity at a second height;a pressure chamber body disposed within the cavity of the nozzle body, the pressure chamber body defining a pressure chamber and having a first port selectively communicating with the outlet port of the fuel feeding passage and a second port selectively communicating with the port of the injection passage;a piston forming an end wall of the pressure chamber; andan actuator for displacing the pressure chamber body relative to the piston, whereby the firstly pressurized fuel is secondly pressurized and the secondly pressurized fuel is selectively infected to the combustion chamber.