Patent ID: 8925525
Filing Date: 2015-01-06
Classification: F02D,F02M

Abstract:
1. A method for operating a fuel injection system of an internal combustion engine, in which fuel is delivered by a high-pressure pump into a fuel rail and in which a quantity of the delivered fuel is influenced by a quantity control valve operated by an electromagnetic operating device, a trigger signal supplied to the electromagnetic operating device being defined by at least two parameters, the method comprising: in a preliminary adapting step, varying at least one first parameter of the at least two parameters, which is supplied to the electromagnetic operating device, from a respective starting value successively up to a respective final value at which a closing or opening of the quantity control valve transitions from being fully detected to no longer or just barely detected, wherein (a) a second parameter of the at least two parameters is defined prior to the varying, (b) the first parameter and the second parameter can be varied without influencing each other, and (c) the second parameter is fixed as defined prior to the varying for a duration of the varying of the first parameter; subsequently defining the first parameter at least temporarily based on the final value to provide a temporarily defined first parameter; in a first adapting step performed after the preliminary adapting step, one of adapting (i) the temporarily defined first parameter based on at least one prevailing operating variable of the fuel injection system, and (ii) the second parameter based on at least one prevailing operating variable of the fuel injection system and the temporarily defined first parameter; and for whichever of the temporarily defined first parameter and the second parameter that was not adapted in the first adapting step: