Fuel control for gas turbine with continuous pilot flame

Patent · Sat Jan 01 00:00:00 EST 1983

OSTI ID:864632

Swick, Robert M ^[1]

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1. Indianapolis, IN

An improved fuel control for a gas turbine engine having a continuous pilot flame and a fuel distribution system including a pump drawing fuel from a source and supplying a line to the main fuel nozzle of the engine, the improvement being a control loop between the pump outlet and the pump inlet to bypass fuel, an electronically controlled throttle valve to restrict flow in the control loop when main nozzle demand exists and to permit substantially unrestricted flow without main nozzle demand, a minimum flow valve in the control loop downstream of the throttle valve to maintain a minimum pressure in the loop ahead of the flow valve, a branch tube from the pilot flame nozzle to the control loop between the throttle valve and the minimum flow valve, an orifice in the branch tube, and a feedback tube from the branch tube downstream of the orifice to the minimum flow valve, the minimum flow valve being operative to maintain a substantially constant pressure differential across the orifice to maintain constant fuel flow to the pilot flame nozzle.

• Assignee: General Motors Corporation (Detroit, MI)
• Patent Number(s): US 4394811
• OSTI ID: 864632
• Country of Publication: United States
• Language: English

Related Subjects

fuel
control
gas
turbine
continuous
pilot
flame
improved
engine
distribution
including
pump
drawing
source
supplying
line
main
nozzle
improvement
loop
outlet
inlet
bypass
electronically
controlled
throttle
valve
restrict
flow
demand
exists
permit
substantially
unrestricted
minimum
downstream
maintain
pressure
ahead
branch
tube
orifice
feedback
operative
constant
differential
fuel nozzle
flow valve
main fuel
pilot flame
fuel distribution
control loop
substantially constant
turbine engine
gas turbine
pressure differential
constant pressure
fuel flow
improved fuel
minimum pressure
restrict flow
pump inlet
fuel control
maintain constant
electronically controlled
continuous pilot
/60/