Control for start-up of a gas turbine engine
First Claim
1. A system for controlling fuel flow to a turbine type power plant for starting the engine from ignition to idle speed mode of operation including means responsive to certain engine operating parameters to schedule a reference torque signal, means responsive to the actual torque produced by said engine upon engine start-up for being compared to said referenced torque signal and means, including a fuel control for regulating fuel flow in accordance with the difference of said referenced torque signal and said actual torque signal for regulating the amount of fuel being fed to the engine during said mode of power plant operation.
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Accused Products
Abstract
A closed loop control for starting a gas turbine engine is disclosed. Upon engine ignition, fuel flow is adjusted as a function of the difference between a desired torque and actual torque so as to provide an optimum schedule to accelerate the engine to the idle speed condition.
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Citations
11 Claims
- 1. A system for controlling fuel flow to a turbine type power plant for starting the engine from ignition to idle speed mode of operation including means responsive to certain engine operating parameters to schedule a reference torque signal, means responsive to the actual torque produced by said engine upon engine start-up for being compared to said referenced torque signal and means, including a fuel control for regulating fuel flow in accordance with the difference of said referenced torque signal and said actual torque signal for regulating the amount of fuel being fed to the engine during said mode of power plant operation.
- 7. A system for controlling fuel flow to a turbine type power plant having a compressor and turbine for starting the power plant from ignition to idle speed mode of operation, a starter for imparting rotary motion to said compressor and turbine until a predetermined speed is achieved for ignition, an initial start-up portion responding to compressor inlet pressure and turbine inlet temperature for initiation ignition upon actuation of said starter, a closed loop start-up portion having means responsive to certain power plant operating parameters to schedule a referenced torque signal, means responsive to the actual torque produced by said power plant upon power plant start-up for being compared to said referenced torque signal and means including a fuel control for regulating fuel flow in accordance with the difference of said referenced torque signal and said actual torque signal for regulating the amount of fuel being fed to the power plant during said mode of power plant operation.
Specification