Robert Boschgmbh

Frank Bast

Ingo Drewe

Systems and methods related to activating a parking lock system in the drive train of a vehicle having at least one electrical machine comprising a transmission which is connected to driven wheels. The method includes comparing a rotational speed nof the at least one electrical machine with the transmission to a predetermined threshold value for a limiting speed n, triggering, in the event that the rotational speed nis below the threshold value for the limiting speed n, a command for the actuation of an actuator system for activating the parking lock system, triggering, in the event that the rotational speed nexceeds the threshold value for the limiting speed n, a command for preventing an actuation of an actuator system for activating the parking lock system, and miming through a second comparison stage so long as n&#x2265;n.

Method for activating a parking lock system and parking lock system

A method for measuring an engine load of a drive motor in a vehicle. Here, at least one parameter which characterizes the engine load is allocated a driving distance equivalent. This driving distance equivalent is then incremented by a driving distance counter. If the vehicle is equipped with a sailing functionality, the driven distance is counted only if the vehicle is moving and the drive train is coupled to the drive motor without slip. A rate of rotation sensor, a clutch sensor and a driving distance counter able to be switched on and off are required for running the method of the present invention. A computer program is used in addition.

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Asperg, Germany

Frank Bast