Multiplexing hydraulic control network with latching valves
US5551478A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 21, 1994 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Oct 21, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87209
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A hydraulic control system for a jet aircraft engine has an electronic control that commands a pair of torque motors to ultimately control the position of each one of a plurality of two-position, "latching" hydraulic actuator valves. A first torque motor is operable with a three-position, on/off hydraulic valve. The second torque motor operates in conjunction with a second valve to control the linear position of the spool of a multiplexer selector valve. The multiplexer selector valve has a plurality of positions that the spool can be linear translatable to. At each position is located a pair of control ports to which are ultimately connected one side of each of a pair of corresponding hydraulic actuator valves. The actuator valves may comprise fuel or air valves. A selected fuel or air actuator valve is translated between one of its two positions by translating the spool of the multiplexer selector valve to the appropriate position and then porting high pressure hydraulic fluid to that actuator valve for a predetermined period of time. The control system can asynchronously chose any fuel or air actuator valve to translate, as necessary, at any point in time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.