Aircraft engine bleed air flow balancing technique
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United States of America Patent
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-
Jun 9, 1987
Grant Date -
N/A
app pub date -
Feb 8, 1985
filing date -
Feb 8, 1985
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bleed flow modulator is used in conjunction with pressure regulating valves regulating bleed air pressure from each engine to a common manifold. The bleed flow modulator monitors the pressure drop across a heat exchanger, which pressure drop is proportional to flow rate of bleed air through the heat exchanger. By providing a limited authority negative feedback signal to the pressure regulating valve from the bleed flow modulator, flow rate of bleed air from each engine to the common manifold is kept near a desired uniform value, thereby achieving balanced flow extraction of bleed air from the aircraft engines.
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