ALEXANDRIA, Va., Aug. 26 -- United States Patent no. 12,398,681, issued on Aug. 26, was assigned to RTX Corp. (Farmington, Conn.).
"Built-in test of actively controlled fuel nozzles" was invented by Alessio Pulliero (Glastonbury, Conn.) and Gary McBrien (Glastonbury, Conn.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A method for detecting performance degradation of an AC Nozzle in a gas turbine engine including operating the gas turbine engine under a normal operating condition, maintaining the fuel flow rate at a constant fuel flow rate, determining a delta pressure PDelta-Normal across an N number of Proportional Metering Valves (PMVs) as the gas turbine engine is operating under the normal operating co...