Patent ID: 7028667
Filing Date: 2006-04-18
Classification: F02D,F02M,Y02T

Abstract:
1. A fuel supply apparatus for an internal combustion engine, comprising: a delivery pipe for supplying a pressurized fuel to a fuel injection valve for performing fuel supply to each cylinder of the internal combustion engine; a high pressure fuel pump actuated by a pump driving cam driven by the internal combustion engine and for discharging the pressurized fuel to the delivery pipe; an electromagnetic valve for adjusting a fuel discharge amount from the high pressure fuel pump; a rotation position detection unit for outputting a rotation position signal of the internal combustion engine; a control unit for controlling the electromagnetic valve by a control signal corresponding to the rotation position signal so that the fuel discharge amount corresponds to an operation state of the internal combustion engine, and for controlling a fuel pressure in the delivery pipe; and a cam position error estimation means for estimating an attachment error of the high pressure fuel pump and the pump driving cam on the basis of a fuel pressure change position where the fuel pressure in the delivery pipe is changed by a start of fuel discharge from the high pressure fuel pump and a rotation position of the internal combustion engine obtained by the rotation position detection unit, wherein the control unit controls the control signal to the electromagnetic valve according to the attachment error estimated by the cam position error estimation means.