US 12,241,414 B1
Single variable displacement fuel systems with fuel oil cooler bypass and gas generator fault accommodation
Ryan Prescott Susca, Windsor, CT (US); Sachin Ramprashad, West Hartford, CT (US); and Ryan Shook, Walla Walla, WA (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Dec. 20, 2023, as Appl. No. 18/390,197.
Int. Cl. F02C 7/14 (2006.01); F02C 7/22 (2006.01); F23R 3/28 (2006.01)
CPC F02C 7/14 (2013.01) [F02C 7/22 (2013.01); F23R 3/28 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system comprising:
an actuation pump sub-system (APS) with an inlet configured to feed fuel from a fuel source into the APS, a first outlet configured for connecting the APS in fluid communication with an actuation system to supply fuel flow for actuation, a second outlet feeding into a supply line, and a third outlet feeding into the supply line;
a fuel oil cooler (FOC) in a first branch of the supply line, the FOC being in fluid communication to receive flow from the second outlet, wherein the APS includes a bypass valve (BPV) in a second branch of the supply line, in parallel with the FOC and in fluid communication to allow flow from the third outlet into the supply line bypassing the FOC;
a combined main and augmentor pump sub-system (CMAPS) with a main inlet connected in fluid communication with the supply line downstream of the BPV and FOC, a gas generator (GG) outlet for supplying fuel to a downstream gas generator, and an augmentor outlet for supplying fuel to a downstream augmentor; and
a gearbox, wherein the gearbox is connected to drive one or more fuel pumps in the APS, and to drive one or more pumps of the CMAPS.