| CPC F02C 7/232 (2013.01) [F02C 7/236 (2013.01); F02C 9/30 (2013.01); F05D 2260/606 (2013.01)] | 20 Claims |
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1. A fuel system for a gas turbine engine comprising:
a fuel control comprising an outlet for fluidical connection to a burner of the gas turbine engine;
an augmentor fuel control comprising an outlet for fluidical connection to an augmentor of the gas turbine engine;
a gearbox:
a first pump unit connected to the gear box and comprising:
a first housing;
a first drive shaft mechanically connected to the gearbox;
a main pump within the first housing and connected to the first drive shaft and powered by the first drive shaft;
a stability-shutoff valve in the first housing and comprising:
an inlet fluidically connected to an outlet of the main pump; and
a modulating window for forming an adjustable flow restriction downstream from the main pump;
an augmentor pump within the first housing and powered by the first drive shaft, wherein the augmentor pump comprises:
an outlet fluidically connected to an inlet of the augmentor fuel control; and
a fuel-oil-cooler bypass valve in the first housing and comprising:
an inlet fluidically connected to an outlet of the stability-shutoff valve;
an outlet fluidically connected to an inlet of the fuel control; and
a bypass control line fluidically connected to the outlet of the augmentor pump, wherein the bypass control line is configured to send a pressure signal to the fuel-oil-cooler bypass valve to open the fuel-oil-cooler bypass valve based on the augmentor pump being in an on state; and
a fuel oil cooler comprising:
a fuel inlet fluidically connected to the outlet of the stability-shutoff valve; and
a fuel outlet fluidically connected to the inlet of the fuel control.
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