Patent ID: 9255540
Filing Date: 2016-02-09
CPC Classification: F02D

Claim Text:
1. A method for operating an internal combustion engine including an injection system having at least one injector and an injector system control unit, the method comprising, for a particular injector: storing a predefined setpoint value of an injection quantity of the injector in the form of a nominal characteristic diagram having nominal characteristic curves in the control unit; adapting the nominal characteristic diagram to individual tolerances of the injector using injector coding to obtain an individual characteristic diagram having individual characteristic curves; applying a plurality of different correction functions for detecting and correcting a service life quantity drift of the injector to obtain a plurality of corrected individual characteristic diagrams having corrected individual characteristic curves; determining offsets of the corrected individual characteristic curves with respect to the nominal characteristic curves to produce offset curves, and using sections of the offset curves that define a minimum offset as actuation correction data for the injection quantity, wherein in each case the minimum offset of the next offset curve is used if two offset curves intersect.