Patent ID: 6343588
Filing Date: 2002-02-05
Classification: F02M

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 passage through an intake valve into a pressurizing chamber by a reciprocating movement of a plunger in a cylinder and discharges the pressurized fuel into the delivery pipe through a discharge valve, an electromagnetic valve which is located in a relief passage communicating the pressurizing chamber of the fuel pump with the fuel intake passage 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 passage at the time of opening the valve, and control means for supplying a valve-opening signal to the electromagnetic valve, wherein the supply of the valve-opening signal from the control means to the electromagnetic valve is stopped when the plunger reaches a predetermined position between a top dead point and a bottom dead point during an intake stroke of the plunger.