Flow control system for a gas turbine engine
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United States of America Patent
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Issued Date -
May 12, 2005
app pub date -
Nov 11, 2003
filing date -
Nov 11, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A flow control system for controlling a variable displacement pump including a metering valve in fluid communication with the pump for metering an output of the pump. A regulating valve receives a portion of the output of the pump as a bypass flow at a first pressure, wherein an output of the regulating valve is at an interim pressure. The interim pressure is substantially equal to an average of the first pressure and a low reference pressure. An actuator sets a displacement of the pump by acting on a piston connected to a cam ring of the pump. The actuator receives the interim pressure and, thereby, the output of the variable displacement pump is determined.
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