Patent ID: 9599107
Date: 2017-03-21
CPC Classifications: B60K,E02F,F04B,F16H

Claim:
1. A method for controlling a hydrostatic drive unit of a work vehicle, the method comprising: determining, with a processor-based device, a reference swashplate position of a hydraulic pump of the hydrostatic drive unit, the reference swashplate position being associated with an uncompensated current command; determining, with the processor-based device, 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, with the, processor-based device, a position error between the actual swashplate position and the reference swashplate position; determining, with the processor-based device, a closed-loop current command based at least in part on the position error between the actual and reference swashplate positions; adjusting, with the processor-based device, the closed-loop current command based on a first correction factor to generate a first corrected current command; adjust, with processor-based device, the uncompensated command based on a second correction factor to generate a second corrected current Command; generating, with the processor-based device, a modified current command based on at least one of the first corrected current command or the second corrected current command, wherein the modified current command differs from the closed-loop current command when an operator input is within a predetermined control input range and wherein the modified current command is equal to the closed-loop current command when the operator input is outside the predetermined control input range; and controlling, with the processor-based device, a displacement swashplate of the hydraulic pump based on the modified current command.