Fuel injection controller for use in an internal combustion engine

A fuel injection control apparatus for a combustion engine comprising:

• a) a nozzle for injecting fuel into the engine, said nozzle having a valve opened in response to a fuel pressure which is greater than or equal to a predetermined pressure;
• b) a pump for supplying the fuel to the nozzle;
• c) means for detecting actual fuel pressure by measuring an opening valve pressure when the nozzle is opened;
• d) means for computing an opening valve pressure deviation between said actual opening valve pressure and reference opening valve pressure;
• and
• e) means for computing a remaining fuel amount change value between the pump and the nozzle using said opening valve pressure deviation;
• f) means for setting a target fuel amount for a next injection of said nozzle in accordance with said remaining fuel amount change value;
• and
• g) means for controlling the pump operation based on said target fuel amount.