A method of operating a drive system

The invention relates to a method of operating a drive system (1), in particular for motor vehicles and mobile equipment, with an internal combustion engine (2), in particular a diesel internal combustion engine, which can be coupled with a with a crankshaft of the internal combustion engine (2) electric motor-generator (3 ), and at least one energy storage associated therewith. A particularly high overall efficiency and low emissions can be in a compact drive system (1) achieved if maximum mean pressures between 25 bar and 35 bar designed internal combustion engine (2) during at least one of acceleration operation, the internal combustion engine (2) is regulated so that the unsteady remain emissions within a defined tolerance range of the measured stationary at this operating point emissions, it is preferably supplied turn during the acceleration process, the electric motor-generator (3).