Patent ID: 11965654
Assignee: COLLINS ENGINE NOZZLES, INC.
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 0:
1. A fuel system comprising:
a fuel supply system;
a plurality of fuel nozzles connected in fluid communication with the fuel supply system to supply fuel from a fuel source to be issued for combustion from the fuel nozzles; and
a cooling system, wherein the fuel supply system includes:
a first fuel manifold connected in fluid communication with a first subset of the fuel nozzles to supply the fuel to be issued for combustion from the first subset of fuel nozzles; and
a second fuel manifold connected in fluid communication with a second subset of the fuel nozzles to selectively supply the fuel to be issued for combustion from the second subset of fuel nozzles with the second subset of fuel nozzles staged on, wherein each of the fuel nozzles of the second subset includes a cooling circuit in addition to a fuel circuit for issuing fuel from the second fuel manifold for combustion, wherein the cooling circuit includes an inlet and an outlet, wherein the inlet is in fluid communication with the cooling system for circulation of coolant through the cooling circuit and back directly to the cooling system out the outlet of the cooling circuit without passing through another fuel nozzle, for cooling the fuel circuit with the fuel circuits of the second subset of fuel nozzles staged off.