SYSTEM AND METHOD FOR CONTROLLING A HYDROSTATIC DRIVE UNIT OF A WORK VEHICLE USING A COMBINATION OF CLOSED-LOOP AND OPEN-LOOP CONTROL

摘要

A method for controlling a hydrostatic drive unit of a work vehicle is disclosed. The method may generally include determining a reference swashplate position of a hydraulic pump of the hydrostatic drive unit, wherein the reference swashplate position is associated with an uncompensated current command, and determining 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 closed-loop current command based at least in part on the actual and reference swashplate positions and generating a modified current command based on at least one of the uncompensated current command or the closed-loop current command. The modified current command may differ from the closed-loop current command when an operator input is within a predetermined control input range and may be equal to the closed-loop current command when the operator input is outside the predetermined control input range.

主权项

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 determining 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 closed-loop current command based at least in part on the actual and reference swashplate positions; and generating a modified current command based on at least one of the uncompensated current command or the closed-loop 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.