Method for starting up a vehicle having a hydrostatic additional drive, and vehicle having a hydrostatic additional drive

A method for starting up a vehicle which has (i) a vehicle drive having an internal combustion engine configured to drive a first wheel or a first axle and (ii) a hydrostatic additional drive configured to drive a second wheel or a second axle, the hydrostatic additional drive having an adjustable hydraulic pump configured to be driven by the internal combustion engine and at least one hydraulic motor method comprising:

• determining a speed of the vehicle;
• controlling a supply pressure of the at least one hydraulic motor in accordance with a position of an accelerator pedal when the speed of the vehicle is determined to be in a range of zero to predetermined speed;
• and
• switching to a mode for adapting a speed of the second wheel or the second axle to the Speed of the vehicle, when the speed of the vehicle is greater than the predetermined speed.

A vehicle, comprising:

• a vehicle drive having an internal combustion engine configured to drive a first wheel or a first axle;
• and
• hydrostatic additional drive configured to drive a second wheel or a second axle, the hydrostatic additional drive having an adjustable hydraulic pump configured to be driven by the internal combustion engine and a hydraulic motor,
• wherein a supply pressure of the hydraulic pump is configured to be controlled using an accelerator pedal when a speed of the first wheel or the first axle is determined to be in range of zero to a predetermined speed, and
• wherein a speed of the second wheel or the second axle is synchronized with the speed of the first wheel or the first axle or a speed of the vehicle when the speed of the first wheel or the first axle or the vehicle is greater than the predetermined speed.