Patent ID: 8585524

Claim:
A method of controlling a drive comprising a prime mover connected to a first element of an epicyclic gearbox, a shift transmission connected to a second element of the epicyclic gearbox, and a hydrostatic machine connected to a third element of the epicyclic gearbox, the method comprising: adjusting the hydrostatic machine to a vanishing displacement volume (V hM ), engaging a gear of the shift transmission, increasing the displacement volume (V hM ) and charging a hydraulic accumulator until a torque equilibrium is reached at the hydrostatic machine, further increasing the displacement volume (V hM ) of the hydrostatic machine and discharging the hydraulic accumulator via the hydrostatic machine, acquiring a rotational speed difference between two elements of the epicyclic gearbox, and closing a clutch to block the epicyclic gearbox.