End of stroke detection for plunger velocity correction
US9989048B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2015 |
| Grant date | Jun 5, 2018 |
| Priority date | — |
| Expiry date | May 26, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/26
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method for controlling a stroke velocity in a pump includes using a sensor to detect a start of a pump stroke and an end of the pump stroke. A stroke time is calculated, the stroke time being a time period between the start of the pump stroke and the end of the pump stroke. The stroke velocity is calculated based on a stroke length and the stroke time. The stroke velocity is compared to a reference stroke velocity. A hydraulic supply pressure to the pump is increased if the calculated stroke velocity is less than the reference stroke velocity, and the hydraulic supply pressure is decreased if the calculated stroke velocity is more than the reference stroke velocity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.