SYSTEM AND METHOD FOR CONTROLLING A HYDROSTATIC DRIVE UNIT OF A WORK VEHICLE
First Claim
1. A method for controlling a hydrostatic drive unit of a work vehicle, the method comprising;
- determining a reference swashplate position of a hydraulic pump of the hydrostatic drive unit, the reference swashplate position being associated with an uncompensated current command;
monitoring an actual swashplate position of the hydraulic pump, the actual swashplate position differing from the reference swashplate position due to a loading condition of the work vehicle;
determining a current compensation based at least in part on the actual and reference swashplate positions; and
generating a compensated current command by adjusting the uncompensated current command based on the current compensation, the compensated current command being associated with a compensated swashplate position for the hydraulic pump that differs from the reference swashplate position.
3 Assignments
0 Petitions
Accused Products
Abstract
A method for controlling a hydrostatic drive unit of a work vehicle is disclosed. The method may generally include determining a reference swashplate position for a hydraulic pump of the hydrostatic drive unit, wherein the reference swashplate position is associated with an uncompensated current command, and monitoring an actual swashplate position of the hydraulic pump, wherein the actual swashplate position differs from the reference swashplate position due to a loading condition of the work vehicle. In addition, the method may include determining a current compensation based at least in part on the actual and reference swashplate positions and generating a compensated current command by adjusting the uncompensated current command based on the current compensation, wherein the compensated current command is associated with a compensated swashplate position for the hydraulic that differs from the reference swashplate position.
10 Citations
20 Claims
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1. A method for controlling a hydrostatic drive unit of a work vehicle, the method comprising;
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determining a reference swashplate position of a hydraulic pump of the hydrostatic drive unit, the reference swashplate position being associated with an uncompensated current command; monitoring an actual swashplate position of the hydraulic pump, the actual swashplate position differing from the reference swashplate position due to a loading condition of the work vehicle; determining a current compensation based at least in part on the actual and reference swashplate positions; and generating a compensated current command by adjusting the uncompensated current command based on the current compensation, the compensated current command being associated with a compensated swashplate position for the hydraulic pump that differs from the reference swashplate position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for controlling a hydrostatic drive unit of a work vehicle, the system comprising:
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a hydraulic pump; a sensor associated with the hydraulic pump, the sensor being configured to monitor an actual swashplate position of the hydraulic pump; a valve configured to regulate a pressure of a hydraulic fluid supplied to the hydraulic pump, the pressure of the hydraulic fluid being related to the actual swashplate position; a controller communicatively coupled to the sensor and the valve, the controller being configured to both determine a reference swashplate position for the hydraulic pump based on operator inputs and determine a current compensation based at least in part on the actual and reference swashplate positions, the controller being further configured to generate a compensated current command for the valve based on the current compensation, wherein the compensated current command is associated with a compensated swashplate position that differs from the reference swashplate position. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification