US 12,449,828 B1
Fuel system with boosted and cooled variable displacement main fuel pump and electromechanical actuators
Naison Mastrocola, Goshen, CT (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Apr. 22, 2024, as Appl. No. 18/642,162.
Int. Cl. G05D 16/20 (2006.01); F02C 7/236 (2006.01); F02C 7/32 (2006.01)
CPC G05D 16/208 (2013.01) [F02C 7/236 (2013.01); F02C 7/32 (2013.01); Y10T 137/86002 (2015.04); Y10T 137/86027 (2015.04)] 18 Claims
OG exemplary drawing
 
1. A fluid system comprising:
an inlet line;
a boost pump connected to the inlet line to receive input flow;
a boost line connected to an outlet of the boost pump;
a variable displacement pump connected to the boost line to receive the input flow, the variable displacement pump comprising:
a valve element operable to vary an output of the variable displacement pump; and
a valve actuator connected to the valve element;
an auxiliary pump connected to the boost line and configured to output an actuator pressure;
a control valve connected to the auxiliary pump and to control lines of the variable displacement pump, wherein the control valve is operable to vary a position of the valve element via displacement of the valve actuator; and
a plurality of actuator modules, each actuator module comprising a control unit collocated with an actuator.