US 2006/0218929 A1 · Gas turbine engine control system

Abstract

In a gas turbine engine control system having a first valve for regulating the flow rate of fuel in premixed combustion and a second valve for regulating that in diffusion combustion, when the combustion mode is switched from one mode to the other mode, whichever of the first and second valves is associated with the other combustion mode is opened to supply the amount of fuel required for conducting the other combustion mode and, the opening of the valve associated with the one combustion mode is gradually decreased, while that of the other combustion mode is gradually increased, thereby maintaining the total amount of fuel supplied to the engine constant, after elapse of a predetermined period. At the time of switching the combustion mode, therefore, the total amount of fuel supplied to the engine can be accurately controlled to a desired value to minimize engine speed fluctuation.

Claims14

Dependent claims

A system for controlling a gas turbine engine, comprising:

a first valve regulating a flow rate of fuel used in premixed combustion;
a second valve regulating the flow rate of fuel used in diffusion combustion;
and
a controller switching the combustion from one to other between the premixed combustion and the diffusion combustion and operating one of the first valve and the second valve associated with the other combustion to be switched so as to supply an amount of fuel required for conducting the other combustion to be switched;
wherein the controller decreases the opening of the valve associated with the one combustion to be switched from, while increasing the opening of the valve associated with the other combustion to be switched to, thereby maintaining a total amount of the fuel supplied to the engine constant, after elapse of a predetermined period since opening of the valve associated with the other combustion mode to be switched to.

2 more elements

A method of controlling a gas turbine engine having a first valve regulating a flow rate of fuel used in premixed combustion and a second valve regulating the flow rate of fuel used in diffusion combustion, comprising the step of:

controlling switching the combustion from one to other between the premixed combustion and the diffusion combustion and operating one of the first valve and the second valve associated with the other combustion to be switched so as to supply an amount of fuel required for conducting the other combustion to be switched;
wherein the step of controlling decreases the opening of the valve associated with the one combustion to be switched from, while increasing the opening of the valve associated with the other combustion to be switched to, thereby maintaining a total amount of the fuel supplied to the engine constant, after elapse of a predetermined period since opening of the valve associated with the other combustion mode to be switched to.

Dependencies are inferred from the claim text.

Gas turbine engine control system

Life of this patent

Gas turbine engine control system

Life of this patent

Abstract

Claims14