Patent ID: 6336445
Filing Date: 2002-01-08
Classification: F02B,F02D,F02M,Y02T

Abstract:
A fuel supplying apparatus for an internal combustion engine, having a fuel pump that draws fuel into a pressurizing chamber and delivers fuel toward a fuel injection valve of the internal combustion engine by changing a capacity of the pressurizing chamber based on a relative movement between a cylinder and a plunger caused by a rotation of a cam, and a spill valve that opens and closes a communication between the pressurizing chamber and a spill passage for letting fuel out of the pressurizing chamber, an amount of fuel delivered from the fuel pump toward the fuel injection valve being adjusted by controlling a closed valve period of the spill valve, the fuel supplying apparatus comprising:a controller that controls the closed valve period of the spill valve by changing a valve closure start timing of the spill valve so that an amount of fuel that needs to be delivered from the fuel pump for a fuel injection from the fuel injection valve is provided; the fuel supplying apparatus configured so that the valve closure start timing of the spill valve that provides a maximum amount of fuel that needs to be delivered occurs within a predetermined cam angle range in which an amount of the relative movement between the cylinder and the plunger occurring during rotation of the cam changes with a constant gradient with respect to a change in phase of the cam.