Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1993-03-02
1995-12-12
Ryznic, John E.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60490, 180307, F16H 6142, B60K 1710, F16D 3102
Patent
active
054738954
ABSTRACT:
The invention relates to a hydrostatic travelling drive for a vehicle, having a primary-adjustable and secondary-adjustable hydrostatic driving gear, which comprises at least two hydraulic machines in the form of a hydraulic pump drivable by a drive motor of the vehicle and a hydraulic motor connected to the hydraulic pump by way of at least one operating line, both of which can be adjusted in their respective stroke volume in dependence upon a control signal changing with the load of the driving gear. To avoid disturbances of the secondary adjustment of the hydrostatic driving gear through momentarily or rapidly occurring fluctuations of the driving-gear load, as control signal for adjusting the hydraulic motor a travelling-speed signal generated by a sensor device and corresponding with the travelling speed of the vehicle is used which with increasing travelling speed effects a swinging-back of the hydraulic motor, i.e. an adjustment in the direction of its minimum stroke volume.
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Bausenhart Heinz
Leibing Karl-Heinz
Hydromatik GmbH
Ryznic John E.
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