Hydrostatic vehicle drive with control device and control device for hydrostatic drives
AssigneeSauer-Danfoss Inc.
InventorsMartin Wüstefeld, Jürgen Ploog, Bernd Hames, Bernd Hänisch
Life of this patent
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Abstract
A hydrostatic vehicle drive has a control (5) for controlling an output torque of the drive and another control device (5) for controlling the output torque of a hydrostatic drive, the control device (5) having a controllable pressure-limiting valve (6) by means of which the working pressure can be adjusted and which is used for sensitive control of the output torque of a hydraulic motor (3). The pressure-limiting valve (6) can be controlled by a proportionally adjustable pressure-reducing valve (7).
Claims11
A hydrostatic vehicle drive, comprising, an adjustable hydraulic pump (1), which can be adjusted proportionally by means of an adjusting device (2) to produce a variable working pressure,
- a hydraulic motor (3) in a closed hydraulic circuit,
- working lines (4) between the hydraulic pump (1) and the hydraulic motor (2),
- and a control device (5) for controlling an output torque of the drive,
- a controllable pressure-limiting valve (6) on the control device (5) so that the working pressure can be adjusted and can be controlled by means of a proportionally adjustable pressure-reducing valve (7) to allow sensitive control of the output torque at the hydraulic motor (3).
A control device for the sensitive control of the output torque of a hydrostatic drive, comprising
- a drive having at least one proportionally adjustable hydraulic pump and one fixed-displacement hydraulic motor, which are connected to one another by working lines,
- a controllable pressure-limiting valve (6), for adjusting the working pressure of the hydrostatic drive,
- the pressure-limiting valve (6) being controllable by means of a proportionally adjustable pressure-reducing valve (7) connected to pressure-limiting valve to control the same.
Dependencies are inferred from the claim text.