System and method for controlling a hydrostatic drive unit of a work vehicle using a combination of closed-loop and open-loop control
US9599107B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 24, 2014 |
| Grant date | Mar 21, 2017 |
| Priority date | — |
| Expiry date | Feb 6, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B2201/12051
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for controlling a hydrostatic drive unit of a work vehicle 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. The method may also include determining a closed-loop current command based a on the actual and reference swashplate positions and generating a modified current command based on the uncompensated current command and/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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.