A method of operating a Kraftstoffeinspitzanlage an internal combustion engine

It is method of operating a fuel injection system of an internal combustion engine is described. The fuel injection system comprises an injector for metering fuel into a combustion chamber of the internal combustion engine. The injector has an actuator, a control valve and a nozzle needle. In the method, the actuator voltage and / or current during a drive time (i.e. The switching valve is set by the actuator in a reciprocating motion. By the reciprocating motion of the switching valve of the injector is opened by means of the nozzle needle and closed. A further period of time (i.e. The additional time period (i.e. A function is determined that the drive time (i.e. By means of the function is a minimum drive time at which the nozzle needle opens and leads to an injection determined. An opening delay time (d