Method and apparatus for adjusting the injection current duration of each fuel shot in a multiple fuel injection event to compensate for inherent injector delay

A fuel injection control system for regulating the injection duration of a fuel injector to inject a predetermined volume of fuel during each fuel shot of a multiple shot injection event, the fuel injector being operable to start fuel injection at a predetermined threshold injection pressure, the system comprising:

• an engine speed sensor operable to sense engine speed and generate an output signal indicative thereof;
• and
• an electronic controller in electrical communication with the engine speed sensor and the fuel injector;
• the electronic controller being operable to establish a fuel injection delay for at lease one fuel shot, and
• the electronic controller being operable to determine the injection duration necessary to inject the predetermined volume of fuel during each fuel shot based upon the determined injection delay and the signal from the engine speed sensor, the injection duration accounting for the time delay.