Forklift and control method of forklift
US-9221657-B2 · Dec 29, 2015 · US
System and method for controlling a hydrostatic drive unit of a work vehicle
US9309969B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9309969-B2 |
| Application number | US-201414162839-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 24, 2014 |
| Priority date | Feb 22, 2013 |
| Publication date | Apr 12, 2016 |
| Grant date | Apr 12, 2016 |
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Abstract
Official abstract text for this publication.
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.
First claim
Opening claim text (preview).
What is claimed is: 1. A method for controlling a hydrostatic drive unit of a work vehicle, the method comprising: determining a reference swashplate position for a swashplate of a hydraulic pump of the hydrostatic drive unit, the reference swashplate position being associated with an unadjusted valve current command; monitoring an actual swashplate position of the swashplate, the actual swashplate position differing from the reference swashplate position due to a loading condit…
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Operations & Transport · mapped topic
- F16H61/431Primary
Mechanical Engineering · mapped topic
Operations & Transport · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9309969B2 cover?
- 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 swas…
- Who is the assignee on this patent?
- Cnh America Llc, Cnh Ind America Llc
- What technology area does this patent fall under?
- Primary CPC classification F16H61/431. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 12 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).