Process for controlling the pressure and delivery of a fuel feed to a servovalve unit
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United States of America Patent
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-
May 27, 2003
Grant Date -
Dec 12, 2002
app pub date -
Aug 9, 2002
filing date -
Mar 16, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device for controlling fuel pressure and delivery as necessary for the operation of the servovalves of an aircraft engine is disposed downstream of a fuel injector feed unit of the engine. The device comprises a chamber maintained at the servovalve feed pressure by the movement of a closure member to vary the opening of a port of the chamber. The closure member moves under the action of opposing forces comprising inter alia a force in the opening direction proportional to the servovalve feed pressure. An equilibrium position of the closure member is a function of pressure resulting from the engine speed. An injector delivery control loop is therefore isolated from a servovalve pressure and delivery control loop.
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