Method for online adaptation of characteristic line of hybrid vehicle

The invention relates to a method for the online adaptation of a characteristic line of a hybrid vehicle having a hybridized drive train with an electric drive mechanism that can be supplied with electricity from an electrical energy storage arrangement. The at least one characteristic line is used for the selection of an operating mode and/or for determining an operating point of the drive train. The method is characterized by comprising the steps of: establishing a plurality of partition boundaries that divide a range of states of charge of the energy storage arrangementinto a plurality of regions, wherein at least one of the partition boundaries can be variably determined during the operation of the vehicle; predetermining a profile of the characteristic line depending on a state of charge of the energy storage arrangement, wherein the value of at least one characteristic line can be fixed determined at the partition boundaries; and online adaptation of the at least one characteristic line in the event of