Modulating bypass control system and method

Details Modulating bypass control system and method Modulating bypass control system and method

2007-02-20

2007-02-20

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Processes

Involving pressure control

C137S115070, C137S115230, C137S599110, C137S012000

Reexamination Certificate

active

11041859

ABSTRACT:
A control system for a bypass duct includes a pneumatic damper control assembly, a sensor and a pneumatic switch. The damper control assembly includes a damper vane mountable in the bypass duct for movement between relative open and closed positions to regulate airflow through the bypass duct. The position of the damper vane is controllable via pressure applied through a damper control line. The sensor is mountable to the supply duct to transmit a pneumatic supply duct signal via a supply line based on at least one of air pressure or air velocity in the supply duct. Finally, the pneumatic switch opens or closes the connection between the damper control line and the supply line based on the difference between (1) the pneumatic supply duct signal via the supply line, and (2) the combination of the pneumatic pressure from the damper assembly and a switch biasing pressure.

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