US 12,291,998 B2
Hybrid power system with individualized component lubrication and method for operating the same
Adam Gallagher, West Hartford, CT (US)
Assigned to RTX Corporation, Farmington, CT (US)
Filed by Raytheon Technologies Corporation, Farmington, CT (US)
Filed on Feb. 27, 2023, as Appl. No. 18/114,656.
Prior Publication US 2024/0287933 A1, Aug. 29, 2024
Int. Cl. F02C 7/06 (2006.01); B64D 27/10 (2006.01); B64D 27/24 (2006.01); F02C 7/32 (2006.01)
CPC F02C 7/06 (2013.01) [B64D 27/10 (2013.01); B64D 27/24 (2013.01); F02C 7/32 (2013.01); F05D 2220/323 (2013.01); F05D 2220/76 (2013.01); F05D 2260/98 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A hybrid electric propulsion system, comprising:
a thermal engine;
an electric generator driven by the thermal engine, and configured to produce electrical power;
a lubrication fluid pump configured to provide a lubrication fluid at a volumetric fluid flow rate to a component of the thermal engine;
an electric motor configured to drive the lubrication fluid pump using said electrical power from the electric generator; and
a controller in communication with the electric motor and a memory device storing instructions, which instructions when executed cause the controller to control the electric motor to drive the lubrication fluid pump to produce said lubrication fluid at said volumetric fluid flow rate to the component of the thermal engine,
wherein:
the thermal engine is a gas turbine engine;
the lubrication fluid pump includes a scavenge pump configured to recover said lubrication fluid from the component of the thermal engine;
the electric motor includes a first electric motor configured to drive the scavenge pump using said electrical power from the electric generator; and
the instructions when executed cause the controller to control the first electric motor to drive the scavenge pump to recover said lubrication fluid from the component of the thermal engine.