Apparatus for controlling the rotary speed in turbo-jet engines

Details Apparatus for controlling the rotary speed in turbo-jet engines Apparatus for controlling the rotary speed in turbo-jet engines

1979-06-14

1980-08-19

Garrett, Robert E.

Power plants

Combustion products used as motive fluid

Combined with regulation of power output feature

F02C 904

Patent

active

042177545

ABSTRACT:
A control device produces a control deviation signal representing the difference between the commanded engine speed and the actual engine speed. Before this signal is applied to a fuel control unit to establish the rate of fuel flow to the engine, its time derivative is limited to a value substantially proportional to the distance that the operating state of the engine is from the surge line. In one embodiment the control deviation signal is differentiated with a lag corresponding to the lag of the fuel control unit before effecting said limiting and, after said limiting is effected, is integrated with a lead corresponding to said lag.

REFERENCES:
patent: 3882672 (1975-05-01), Bauerfeind
patent: 4018044 (1977-04-01), Joby et al.
patent: 4040250 (1977-08-01), Saunders et al.

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