Aircraft engine emergency control system

Details Aircraft engine emergency control system Aircraft engine emergency control system

1993-11-18

1995-08-08

Teska, Kevin J.

Boots, shoes, and leggings

36443101, 36443104, 60 39281, 60 3901, 60 3959, 60243, B64D 3900, B64D 3700

Patent

active

054404908

ABSTRACT:
In the event of incipient engine speed or loss of normal engine control fuel flow rate in a jet engine is limited by a speed governor. A speed governor arrangement with optionally selectable emergency speed control is described. Maximum engine speed limits are stored in ROM and compared with sensed values. When an overspeed threshold is reached an output is produced to reduce fuel flow rate. If normal engine control is lost an alternative governor mode can be selected in which a second fuel flow rate is read from ROM as determined by the pilot's speed lever setting. A lowest wins circuit selects the lower of this emergency control or the governor limit signal to drive the fuel metering unit.

REFERENCES:
patent: 4134257 (1979-01-01), Riple
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patent: 4718229 (1988-01-01), Riley
patent: 4793133 (1988-12-01), White et al.
patent: 4794755 (1989-01-01), Hutto, Jr. et al.
patent: 4821193 (1989-04-01), Barber et al.
patent: 5076048 (1991-12-01), Boston
patent: 5083277 (1992-01-01), Shutler

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