Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1979-07-17
1981-02-24
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
415 27, F02C 918
Patent
active
042519853
ABSTRACT:
A gas turbine engine control for regulating bleed from a compressor which has an engine performance map that is compressor stall stable when the ambient inlet air temperature of the engine exceeds a predetermined level and including a compressor bleed valve having a servo controlled pressure diaphragm operated poppet valve therein that is operative to bleed valve from the compressor in accordance with compressor discharge pressure conditions to extend the stall limits of operation of the compressor during engine start and low power or ground idle operation and wherein the bleed valve is associated with a thermally responsive solenoid valve controlled by a thermal switch responsive to ambient inlet air and supported on the inlet of the compressor at a point beyond the influence of engine generated heat for imposing an override pressure on the bleed valve to hold it in a closed position to prevent engine compressor bleed thereby to avoid engine power depreciation at ambient inlet air temperatures above the predetermined level.
REFERENCES:
patent: 2845938 (1958-08-01), Broders
patent: 2856957 (1958-10-01), McDowall et al.
patent: 2933236 (1960-04-01), Mathieson
patent: 2965285 (1960-12-01), Schorn et al.
patent: 2978166 (1961-04-01), Hahn
patent: 3016702 (1962-01-01), Ladd
patent: 3073511 (1963-01-01), Knight et al.
Casaregola Louis J.
Evans J. C.
General Motors Corporation
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