Patent ID: 8504277

Claim:
A method for determining a control parameter for a fuel injector of an internal combustion engine, comprising the steps of: during an injection cycle of the fuel injector: recording at least two fuel pressure values at different times prior to an injection by the fuel injector, each recorded fuel pressure value indicating a fuel pressure currently present at the fuel injector, calculating an estimated fuel pressure expected to be present at the fuel injector at the time of the injection based at least in part on: the at least two recorded fuel pressure values, and at least one of (a) the respective time of each of the fuel pressure value recordings and (b) the respective crankshaft angle position of the internal combustion engine at the time of each of the fuel pressure value recordings, and controlling a control parameter regarding the injection based at least in part on the calculated estimated fuel pressure expected to be present at the fuel injector at the time of the injection.