Patent ID: 7305972

Claim:
A method of controlling an internal combustion engine ( 1 ) having a common rail fuel injection system including for each cylinder an individual fuel storage chamber ( 8 ) wherein the fuel pressure is sensed and from the pressure pattern (pE(i), I=1, 2 . . . n) of the individual fuel storage chambers ( 8 ) an actual injection end (SE(IST)) is determined, said method comprising the steps of: calculating a fuel injection end deviation (dtSE) from a desired injection end (SE(SL)) and the actual injection end (SE(IST)), calculating an injection begin deviation (dtSB) from a desired injection begin (SB(SL)) and the virtual actual injection begin (SBv(IST)), evaluating an injector ( 7 ) on the basis of the injection end deviation (dtSE) and the injection begin deviation (dtSB) and basing the further control of the internal combustion engine ( 1 ) on the injector evaluation.