Patent ID: 6223731
Filing Date: 2001-05-01
Classification: F02D

Abstract:
Fuel supply apparatus for an internal combustion engine, said apparatus comprising:a fuel pump for transferring fuel to fuel injectors; andfuel pump control means for adjusting fuel pressure fed to said injectors by controlling said fuel pump,wherein said fuel pump control means includes:basic control amount calculating means for calculating a basic control amount tending to cause fuel pressure to become equal to a target fuel pressure;compensation amount calculating means for continuously calculating in real time a compensation amount for compensating delayed response of the fuel supply system depending on the difference between a first-order delay of a fuel injection amount and an actual fuel injection amount and using a single mathematical algorithm whether or not the amount of fuel being consumed by the injectors is in a transient state; andcontrol amount calculating means for calculating a fuel pump control amount depending on said basic control amount and said compensation amount.