Patent ID: 6209522
Filing Date: 2001-04-03
Classification: F02M,F04B

Abstract:
A variable delivery fuel supply device which comprises:fuel injection valves for injecting fuel to respective cylinders of an internal combustion engine, a delivery pipe for supplying pressurized fuel into the fuel injection valves,a fuel pump which sucks fuel from a fuel intake port through an intake valve into a pressurizing chamber by a reciprocating action of a plunger in a cylinder and supplies the pressurized fuel into the delivery pipe through a discharge valve,an electromagnetic valve located in a relief passage communicating the pressurizing chamber of the fuel pump with the fuel intake port and is adapted to control a discharge quantity of the pressurized fuel by relieving the pressurized fuel in the pressurizing chamber into the fuel intake port at the time of opening the valve to thereby control a fuel pressure in the delivery pipe,control means capable of supplying a valve-opening signal to the electromagnetic valve, anda high pressure regulator for controlling a fuel pressure by relieving the pressurized fuel in a high-pressure fuel passage including the delivery pipe.