System and method for controlling dual starter air valve
AssigneeRaytheon Technologies Corporation
InventorsMichael D. Greenberg, Robert Goodman, John M. Dehais
Life of this patent
Estimating the term…
Abstract
A system may comprise a sensor configured to measure a characteristic of an engine component. A valve assembly may have an airflow outlet in fluid communication with the engine component. The valve assembly may include a first valve. A first valve control device may be coupled to the first valve and configured to control the first valve based on a measurement by the sensor. A second valve may be in fluidic series with the first valve. A second valve control device may be coupled to the second valve and configured to control the second valve based on the measurement by the sensor.
Claims18
A method, comprising:
- controlling, by a full authority digital engine control (FADEC), an output pressure of an output airflow by controlling a position of at least one of a first valve and a second valve of a valve assembly based on a rotational speed of a gas turbine engine, the first valve and the second valve in fluidic series;
- determining, by the FADEC, a valve condition, the valve condition corresponding to failure of the first valve;
- and
- pulse width modulating, by the FADEC, a solenoid of the second valve in response to the valve condition to regulate an airflow through the valve assembly.
A system for a gas turbine engine, comprising:
- an air turbine starter operatively coupled to the gas turbine engine and configured to rotate the gas turbine engine during a startup condition;
- a valve assembly having an airflow outlet in fluid communication with the air turbine starter, the valve assembly including:
- a first valve, and
- a second valve in fluidic series with the first valve, and
- a full authority digital engine control (FADEC) coupled to the valve assembly;
- and
- a tangible, non-transitory memory configured to communicate with the FADEC, the tangible, non-transitory memory having instructions stored thereon that, in response to execution by the FADEC, cause the FADEC to perform operations comprising:
- determining, by the FADEC, a valve condition, the valve condition corresponding to a failure of the first valve;
- and
- pulse width modulating, by the FADEC, a solenoid of the second valve in response to the valve condition to regulate an airflow through the valve assembly.
Dependencies are inferred from the claim text.