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US 11,434,994 B2Granted
Wheel drive assembly for a hydrostatic traction drive and hydrostatic traction drive
AssigneeRobert Bosch GmbH
InventorsRonny Herrmann, Matthias Mueller, Peer Mumcu
Life of this patent
Estimating the term…
Abstract
In a hydraulic motor and a hydrostatic traction drive with such a hydraulic motor, the regulating of the displacement of the hydraulic motor is done via a pilot-operated pressure regulator. The feedforward controller calculates an estimated motor displacement and relays this to the pressure regulator.
Claims10
A wheel drive assembly for a hydrostatic traction drive comprising:
- a hydraulic motor comprising an electrical adjusting unit configured to adjust a motor displacement of the hydraulic motor to achieve a continuous relation between a motor drive current and the motor displacement;
- and
- an electronic control unit comprising:
- a pressure regulator configured to regulate the motor displacement in dependence on an actual pressure supplied to the hydraulic motor and a setpoint pressure of the hydraulic motor;
- and
- a feedforward controller associated with the pressure regulator and configured to preset a preset motor displacement,
- wherein the preset motor displacement is a calculated motor displacement calculated based on a model via the feedforward controller based on the setpoint pressure, a motor rotational speed, a pump rotational speed, and one of a pump delivery volume and a pump swivel angle.
4 more elements
A hydrostatic traction drive comprising:
- a wheel drive assembly comprising:
- a hydraulic motor comprising an electrical adjusting unit configured to adjust a motor displacement of the hydraulic motor to achieve a continuous relation between a motor drive current and the motor displacement;
- and
- an electronic control unit comprising:
- a pressure regulator configured to regulate the motor displacement in dependence on an actual pressure and a setpoint pressure;
- and
- a feedforward controller associated with the pressure regulator and configured to preset a preset motor displacement;
- and
- an axial piston pump comprising an adjusting unit configured to adjust a pump delivery volume of the axial piston pump,
- wherein the preset motor displacement is a calculated motor displacement calculated based on a model via the feedforward controller based on the setpoint pressure, a motor rotational speed, a pump rotational speed, and one of the pump delivery volume and a pump swivel angle.
7 more elements
Dependencies are inferred from the claim text.