Back to results
US 8,756,937 B2Granted
Fuel system of gas turbine engines
AssigneePratt & Whitney Canada Corp.
InventorKevin Allan Dooley
Life of this patent
Estimating the term…
Abstract
A method for purging fuel from a fuel system of a gas turbine engine on shutdown of the engine comprises, in one aspect, terminating a fuel supply to the fuel system and using the residual compressed air to create a reversed pressure differential in the fuel system relative to a forward pressure differential of the fuel system used to maintain fuel supply for engine operation, and under the reversed pressure differential substantially purging the fuel remaining in the system therefrom to a fuel source.
Claims6
A method for operating a fuel system of a gas turbine engine, the method comprising:
- pumping a fuel flow from a fuel source through a first section of the system to a pilot nozzle for pilot ignition;
- pumping a fuel flow from the fuel source through a second section of the system to a manifold of a combustor of the engine for combustion;
- and
- using only a single differential pressure transducer included in the system to monitor a pressure differential between the first and second sections, thereby producing a reference signal accordingly for operating the fuel system.
1 more element
Dependencies are inferred from the claim text.