Power plants – Combustion products used as motive fluid – Combined with regulation of power output feature
Patent
1989-08-04
1991-10-01
Casaregola, Louis J.
Power plants
Combustion products used as motive fluid
Combined with regulation of power output feature
25112905, F02C 928
Patent
active
050521748
ABSTRACT:
A fuel control system for providing steady state fuel flow to a gas-turbine engine comprises a pulse-width modulated, solenoid-operated fuel metering valve, an engine speed transducer, and a remote microprocessor communicating with the valve and the speed transducer through an optical fiber. The valve is operated by a direct current signal which is pulsed at a frequency substantially higher than the natural frequency of the valve spring/plunger system, whereby the plunger remains axially displaced from the valve seat to provide continuous flow through the valve. The amount of axial plunger displacement and, hence, the fuel flow rate are prescribed by the pulse width of the signal directed through the valve.
REFERENCES:
patent: 3523676 (1970-08-01), Barker
patent: 3882675 (1975-05-01), Galmiche et al.
patent: 4015426 (1977-04-01), Hobo et al.
patent: 4454713 (1984-06-01), Meyer et al.
patent: 4573115 (1986-02-01), Halgrimson
patent: 4587805 (1986-05-01), Winch et al.
Casaregola Louis J.
Williams International Corporation
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