Method for operating a driveline

A drivetrain for a working machine, wherein the drivetrain comprises:

• a drive motor configured to provide a driving force;
• a continuously variable transmission configured to transmit the driving force from the drive motor to a drive output with a continuously adjustable transmission ratio;
• a detection device configured to detect a current drive output rotation speed of the drivetrain;
• and
• a control unit configured to control the drivetrain when the drive output rotation speed detected is higher than or equal to a drive output rotation speed limit, at which the drivetrain is controlled to simulate a drivetrain having a fixed-gear transmission and a bridged converter transmission, which fully transmits the driving force from the drive motor to the drive output via an engaged converter bridging clutch, such that the driving force in the drivetrain is transmittable via the continuously variable transmission only at different fixed gear ratios, and
• the control unit is configured to control the drivetrain when the drive output rotation speed detected is lower than the drive output rotation speed limit, at which the drivetrain is controlled to simulate a drivetrain having a fixed-gear transmission and a coupled converter transmission, which variably transmits the driving force from the drive motor to the drive output such that the driving force in the drivetrain is transmittable via the continuously variable transmission at different fixed gear ratios and a continuously variable transmission ratio.

A method for operating a drivetrain of a working machine having a drive engine which transmits a driving force via a continuously variable transmission to a drive output, wherein the method comprises at least the following steps:

• controlling a traveling speed of the working machine to accelerate and decelerate the working machine
• detecting a current drive output rotation speed of the drive output;
• comparing the current drive output rotation speed with a drive output rotation speed limit;
• controlling the drivetrain when the current drive output rotation speed is lower than the drive output rotation speed limit, at which the drivetrain is controlled to simulate a drivetrain having a fixed-gear transmission and a coupled converter transmission in which the driving force is variably transmitted, via the coupled converter transmission, to the fixed-gear transmission, such that the driving force in the drivetrain is transmittable via the continuously variable transmission at different fixed gear ratios and a continuously variable transmission ratio.