US 11,988,158 B2
Multi-fuel engine for an aircraft
Ezzat Meshkin Fam, Mississauga (CA); and Xuening Lu, Longueuil (CA)
Assigned to Pratt & Whitney Canada Corp., Longueuil (CA)
Filed by Pratt & Whitney Canada Corp., Longueuil (CA)
Filed on Jul. 19, 2021, as Appl. No. 17/379,532.
Prior Publication US 2023/0015930 A1, Jan. 19, 2023
Int. Cl. F02C 9/40 (2006.01); B64D 37/30 (2006.01); F02C 7/236 (2006.01)
CPC F02C 9/40 (2013.01) [B64D 37/30 (2013.01); F02C 7/236 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for operating an aircraft system, comprising:
operating an engine using first fuel provided by a first fuel source;
switching a fuel supply for the engine between the first fuel source and a second fuel source, the switching of the fuel supply comprising shutting down the engine during aircraft flight such that a flame in an annular combustion chamber of the engine is extinguished, and the switching of the fuel supply further comprising
operating a first flow regulator to stop flow of the first fuel from the first fuel source prior to the flame being extinguished; and
operating a second flow regulator to start flow of the second fuel from the second fuel source after the flame being extinguished; and
operating the engine using second fuel provided by the second fuel source.