Air turbine starter pressure monitor system
AssigneeHamilton Sundstrand Corporation
InventorsJohn T. Pech, W. Dean Kavalkovich
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Abstract
A method of monitoring a gas turbine engine start system includes monitoring a pressure in a starter air duct in communication with a starter air valve which is in communication with an air turbine starter (ATS); identifying an expected transient pressure response in the starter air duct; and identifying the starter air valve as degraded if the expected transient pressure response does not occur after an open command to the starter air valve.
Claims13
A method of monitoring a gas turbine engine start system, the method comprising:
- monitoring a pressure of air in a starter air duct that is upstream of and in communication with a starter air valve which is in communication with an Air Turbine Starter (ATS), wherein the air in the starter air duct is pressurized;
- identifying an expected transient pressure response of the pressure of the air in the starter air duct upstream of the starter air valve;
- and
- identifying the starter air valve as degraded if the expected transient pressure response of the air upstream of the starter air valve does not occur after an open command to the starter air valve by comparing the transient response to a stored nominal response.
A method of monitoring a gas turbine engine start system, the method comprising:
- monitoring a pressure drop within a starter air duct upstream of a starter air valve in communication with an Air Turbine Starter (ATS), wherein air in the starter air duct is pressurized before the monitoring;
- and
- identifying the starter air valve as degraded if the monitored pressure drop upstream of the starter air valve within the starter air duct is less than a stored predetermined pressure drop after an open command is provided to the starter air valve.
Dependencies are inferred from the claim text.