Leo J. Veilleux - Wethersfield CT David T. Anzulewicz - Rocky Hill CT Gerald P. Dyer - Enfield CT
Assignee:
United Technologies Corporation - Hartford CT
International Classification:
F15B 1307
US Classification:
13759615
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.