FUEL FEEDER FOR INTERNAL COMBUSTION ENGINE

摘要

PURPOSE: To provide a fuel feeder for an internal combustion engine capable of appropriately adjusting a fuel forced feed quantity in accordance with modifications of valve closing initiation timing of a spill valve and improving controllability of this fuel forced feed quantity. CONSTITUTION: In a high pressure fuel pump 47 of this fuel feeder, a moving amount (cam velocity) of a plunger 48 during a unit angle rotation of a cam 22a changes in accordance with phase of the cam 22a. A fuel forced feed quantity of the high pressure fuel pump 47 is controlled by modifying valve closing initiation timing of a solenoid spill valve 54, but it is significantly affected by the cam velocity of this valve closing initiation timing. Therefore, for example, a cam profile of the cam 22a is set so that valve closing initiation timing of the solenoid spill valve 54 capable of obtaining a maximum value of a fuel forced feed quantity needed for fuel injection is positioned within a predetermined cam angle range wherein changes of cam velocity due to changes of cam phase are constant. And modifications of the valve closing initiation timing of the solenoid spill valve 54 for adjusting the fuel forced feed quantity are performed within the predetermined cam angle range.