Hydrostatic transmission for a stepless vehicle drive which generally operates in a closed circuit with primary control (pump control) or primary and secondary control (pump and motor control).
If a suitable form of control is used (e.g. automatic control), the hydrostatic traction drive will be able to adjust to the power curves of the combustion engine and thereby fully exploit its torque. This means that almost all torque is available, even at a low motor speed (= lowest accelerator pedal setting f 1) (Figure H 28). This also applies to the braking torque. Using a limit load control prevents the combustion engine becoming overloaded.
Figure H 28: Output characteristic curve for hydrostatic transmission + combustion engine