Patent ID: 8807120

Claim:
A method for operating an internal combustion engine with at least one injection valve for metering fluid, which injection valve having an electromagnetic actuator, having an output stage unit which is designed to generate a current profile for actuating the electromagnetic actuator with at least one predefined profile parameter, the method comprising: for each of a plurality of actuations, applying the current profile to the electromagnetic actuator to atuate the electromagnetic actuator, the current profile defining a plurality of profile parameters, analyzing a detected actual current during the plurality of actuations, calculating a saturation current based on the analyzed actual current during the plurality of actuations, the saturation current corresponding to a point at which a magnetic saturation of a magnetic circuit of the electromagnetic actuator is reached, and adapting the current profile by adapting at least one profile parameter of the current profile as a function of the determined saturation current and a predefined reference saturation current, and using the adapted current profile for at least one subsequent actuations of the electromagnetic actuator.