Patent ID: 7900605

Claim:
A fuel injection system for an internal combustion engine, the system comprising: a plurality of fuel injectors dispensing fuel with multiple injection events during a combustion cycle; an accumulator arranged to supply fuel to the fuel injectors; a pressure sensor for measuring the pressure of fuel in the accumulator; and a control unit arranged to receive a pressure signal from the pressure sensor to construct a hydraulic behavior profile based on a pressure wave characteristic of the plurality of fuel injectors, said hydraulic behavior profile indicative of the fuel pressure that will prevail in an injector dispensing fuel with multiple injection events during a combustion cycle; then when pressure perturbations are detected, to predict, using the pressure signal and the hydraulic behavior profile, the fuel pressure that will prevail in an injector during each injection event; and to supply control signals to that fuel injector to control the amount of fuel injected by each injection event during the combustion cycle in accordance with the predicted fuel pressure.