US 12,345,211 B2
Uncommanded or uncontrollable high thrust detection and mitigation
Govindaraj Kalyanasamy, Indianapolis, IN (US); Mihir Desai, Yorba Linda, CA (US); Andrew Lee, Indianapolis, IN (US); and Mark Collett, Derby (GB)
Assigned to Rolls-Royce North American Technologies, Inc., Indianapolis, IN (US); and Rolls-Royce Corporation, Indianapolis, IN (US)
Filed by Rolls-Royce North American Technologies Inc., Indianapolis, IN (US); and Rolls-Royce Corporation, Indianapolis, IN (US)
Filed on Aug. 21, 2023, as Appl. No. 18/453,069.
Prior Publication US 2025/0067223 A1, Feb. 27, 2025
Int. Cl. F02C 9/26 (2006.01); F02C 9/28 (2006.01); F02C 7/22 (2006.01)
CPC F02C 9/263 (2013.01) [F02C 9/28 (2013.01); F02C 7/22 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method of mitigating uncommanded or uncontrollable high thrust in a gas turbine engine, the method comprising:
spilling a portion of fuel with a primary spill valve disposed downstream of a pump;
detecting a pressure differential across a pressure valve with a pressure transducer, the pressure valve controlling a pressure of the fuel;
determining a flow rate of the fuel based on the detected pressure differential and a positional feedback of a pressure valve opening; and
opening a secondary spill valve in response to the determined flow rate exceeding a demand flow rate.