This invention concerns fuel delivery system for an aircraft engine (10). The system entails two or more fuel sources (32, 34, 36) onboard an aircraft (54), each fuel source (32, 34, 36) having a different fuel therein. At least one fuel delivery regulator (30; 42; 44; 46) is arranged to receive fuel from the fuel sources onboard the aircraft for supply to the aircraft engine (10), and a control unit (26) arranged to control operation of the regulator (30; 42; 44; 46), wherein the control unit (26) actuates the regulator (30; 42; 44; 46) so as to vary the flow of fuels from the plurality of fuel sources to the engine (10) in an order of priority according to the specific energy of the different fuels in the plurality of fuel sources (32; 34; 36). The system may achieve fuel efficiency savings by burning the available fuels in a default priority order.
AIRCRAFT ENGINE FUEL SYSTEM
2016-05-26
Patent
Electronic Resource
English