A method of operating a vehicle driveline with a prime mover, with an output, and with a transmission disposed between the prime mover and the output

摘要

The invention relates to a method for operating a vehicle drive train (1) having a drive machine (2), an output (3) and a transmission (4), which is provided with at least one interlocking shift element (A, F) and with a plurality of frictional shift elements ( B, C, D, E) is executed. When there is a request to activate an engine start-stop function of the vehicle powertrain (1) while the prime mover (2) is shut down, starting from an operating condition of the vehicle powertrain (1) during which a sail operation function of the vehicle powertrain (1) is activated the disconnected prime mover (2) is decoupled from the output (3) and the interlocking shift element (F) is open, and during which a rotational speed of the output (3) is greater than a defined rotational speed to which a differential rotational speed between shift element halves of the opened interlocking shift element ( F) is within a speed range within which the positive-locking switching element (F) can be converted into its closed operating state, the positive-locking switching element is actuated at the latest when reaching the defined speed in the closing direction.