Method for calibrating independent metering valves
US7562554B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 31, 2006 |
| Grant date | Jul 21, 2009 |
| Priority date | — |
| Expiry date | Feb 28, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B13/0442
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A method for calibrating a valve having a valve element movable between a flow blocking position and a flow passing position includes pressurizing fluid directed to the valve, increasing a current directed to the valve for controlling a position of the valve element, and sensing a pressure of the fluid. The method for calibrating the valve also includes determining if a time-derivative of the sensed fluid pressure is greater than a predetermined threshold over a predetermined period of time, and determining a cracking point current command directed to the valve. The cracking point current command is directed to the valve when the time-derivative of the sensed fluid pressure is greater than the predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.