Patent ID: 11878675
Assignee: ZF FRIEDRICHSHAFEN AG
Field: Transport (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 0:
1. A method for operating a drive train of a working machine, comprising: driving a traction drive of the drive train a traction motor via a traction transmission and wherein, during a gear stage change of the traction transmission, synchronizing a speed of the traction motor with a gear stage to be engaged, wherein a computational model of the traction motor is used for synchronizing the speed, while taking account of a moment of inertia of the traction motor, to determine any additional torque to be applied by a friction between the traction motor and a clutch of the gear stage for synchronizing the speed; and wherein a working drive of the drive train is driven by an electric working motor via a working transmission, the method further comprising establishing a drive connection between the working drive and the traction drive so that the traction drive is driven in a supporting manner by the working motor; and driving the traction drive in a supporting manner by the working motor whenever it is thereby possible to achieve an improvement in an overall efficiency of the drive train compared to when the traction drive is driven solely by the traction motor.