System and method for monitoring a bleed valve of a gas turbine engine
AssigneePratt & Whitney Canada Corp.
InventorLouis Duranleau-Hendrickx
Life of this patent
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Abstract
There are described methods, systems, and assemblies for monitoring a bleed valve of a gas turbine engine. The method comprises determining a rate of change of a gas generator speed of the gas turbine engine; determining a rate of change of a parameter indicative of engine power of the gas turbine engine; comparing at least one ratio based on the rate of change of the gas generator speed and the rate of change of the parameter indicative of engine power to at least one range of values; detecting a modulation delay of the bleed valve when the at least one ratio is within the at least one range of values; and transmitting a signal indicative of the bleed valve malfunction in response to detecting the modulation delay.
Claims20
A method for monitoring a bleed valve of a gas turbine engine, the method comprising:
- determining a rate of change of a gas generator speed of the gas turbine engine;
- determining a rate of change of a parameter indicative of engine power of the gas turbine engine;
- comparing at least one ratio based on the rate of change of the gas generator speed and the rate of change of the parameter indicative of engine power to at least one range of values;
- detecting a modulation delay of the bleed valve when the at least one ratio is within the at least one range of values;
- and
- transmitting a signal indicative of the bleed valve malfunction in response to detecting the modulation delay.
A system for monitoring a bleed valve of a gas turbine engine, the system comprising:
- a processing unit;
- and
- a non-transitory computer-readable medium having stored thereon program instructions executable by the processing unit for:
- determining a rate of change of a gas generator speed of the gas turbine engine;
- determining a rate of change of a parameter indicative of engine power of the gas turbine engine;
- comparing at least one ratio based on the rate of change of the gas generator speed and the rate of change of the parameter indicative of engine power to at least one range of values;
- detecting a modulation delay of the bleed valve when the at least one ratio is within the at least one range of values;
- and
- transmitting a signal indicative of the bleed valve malfunction in response to detecting the modulation delay.
An assembly comprising:
- a gas turbine engine;
- a bleed valve in the gas turbine engine;
- at least one sensor coupled to the gas turbine engine for measuring engine parameters;
- and
- a controller coupled to the at least one sensor and configured for:
- determining a rate of change of a gas generator speed of the gas turbine engine;
- determining a rate of change of a parameter indicative of engine power of the gas turbine engine;
- comparing at least one ratio based on the rate of change of the gas generator speed and the rate of change of the parameter indicative of engine power to at least one range of values;
- detecting a modulation delay of the bleed valve when the at least one ratio is within the at least one range of values;
- and
- transmitting a signal indicative of the bleed valve malfunction in response to detecting the modulation delay.
Dependencies are inferred from the claim text.