Fuel control shut-off system
US5133181A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1989 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Dec 28, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02C9/38
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fuel management system (34) for a turbine engine having a metering valve (50) controlled by the input of an electronic computer (36) to a resolver (48). A head pressure sensor (67) responds to pressure differential across the fuel metering valve (50) to control a bypass valve (80) which allows a portion of the fuel available from a fuel supply conduit (58) to return to a fuel reservoir (28). A reference pressure controlled head bypass valve (80) utilizing pressures above (P.sub.1) and below (P.sub.2) a metering valve (50) as reference pressures during normal operation and a non-controlled reference pressure during shut-off to maintain a minimum fuel pressure required for control purposes during shut-off. The non-controlled pressure reference may be obtained as a pressure drop across a series (typically a pair) of small orifices or apertures. The non-controlled reference pressure is typically achieved as the intermediate pressure between a regulated (pcb) body pressure and the inlet fuel supply pressure (P.sub.1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.