Fuel systems and methods for purging
AssigneePratt & Whitney Canada Corp.
InventorsOwen Ho-Yin Wong, John Galas, Sean Durand
Life of this patent
Estimating the term…
Abstract
A fuel system can include a first fuel circuit, a second fuel circuit, and an inert gas purge system operatively connected to both the first fuel circuit and the second fuel circuit to purge at least a portion of either or both of the first and/or second fuel circuit. The first fuel can be a liquid fuel and the second fuel can be a gaseous fuel. The first fuel circuit can include a first fuel manifold configured to fluidly communicate a first fuel supply with at least one dual fuel nozzles downstream of the first fuel manifold.
Claims7
A non-transitory computer readable medium comprising computer executable instructions, the instructions configured to cause a computer to perform a method, the method comprising:
- controlling a purge gas valve of a dual-fuel system of an aircraft and a gaseous fuel valve of the dual-fuel system to cause purging of a gaseous fuel circuit feeding a gaseous fuel to a dual-fuel engine of the aircraft, the purging being performed with a gas from a gas supply of the aircraft;
- and
- simultaneously purging with the gas during shutdown of the dual-fuel engine of the aircraft both the gaseous fuel circuit and a liquid fuel circuit configured to feed a liquid fuel to the dual-fuel engine of the aircraft.
Dependencies are inferred from the claim text.