Method for operating a drive train, as well as control means therefor

The invention relates to a method for operating a drivetrain of a motor vehicle with an internal combustion engine, at least one electric motor, a gear, a flywheel device and a swing start clutch between internal combustion engine and a flywheel device, comprising the steps of: - Open the swing starting clutch, - providing the actual speed of the flywheel device, - providing a target rotation speed of the flywheel mass arrangement, - determining whether the actual speed is sufficient to start the engine, and Determining a lower gear as a target gear, wherein the actual speed of the flywheel device is increased to a target speed at least sufficient to start the internal combustion engine. In addition, the invention relates to a control device.