Fluid working machines and methods
US9091253B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 22, 2009 |
| Grant date | Jul 28, 2015 |
| Priority date | — |
| Expiry date | Dec 16, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0324
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid working machine comprises a controller and a working chamber of cyclically varying volume having an electronically controllable primary low pressure valve and a secondary low pressure port associated therewith, each of which is openable and closable in phased relation to cycles of working chamber volume to bring the working chamber into fluid communication with a low pressure manifold. At least the primary low pressure valve is under the active control of the controller to enable the controller to determine the net displacement of fluid by the working chamber on a cycle by cycle basis. The primary low pressure valve and the secondary low pressure port are openable concurrently and in parallel during a portion of at least some cycles of working chamber volume, including at the point in the expansion or contraction stroke where the rate of change of volume of the working chamber is greatest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.