公开(公告)号：US11873081B2

公开(公告)日：2024-01-16

申请号：US17342963

申请日：2021-06-09

Applicant: Bell Textron Inc.

Inventor： Charles Eric Covington ,  Chia-Wei Su ,  Darren Gregory Lang ,  Thomas Parsons ,  Cody Earl Fegely

IPC: B64C27/12 ,  B64D31/12

CPC classification number: B64C27/12 ,  B64D31/12

Abstract: A rotorcraft has a drive system including a main rotor coupled to a main rotor gearbox to rotate the main rotor at a rotor speed, a main engine coupled to the drive system to provide a first power, a supplemental engine coupled, when a first clutch is engaged, to the drive system to provide a second power additive to the first power, and a control system operable to control the main engine and the supplemental engine to provide a total power demand, where the main engine is controlled based on variations in rotor speed and a power compensation command to produce the first power, and the supplemental engine is controlled to produce the second power in response to a supplemental power demand.

公开(公告)号：US20210070430A1

公开(公告)日：2021-03-11

申请号：US17063712

申请日：2020-10-05

Applicant: Bell Textron Inc.

Inventor： Douglas Andrew Goodwin ,  David Andrew Prater ,  Eric Stephen Olson ,  David Bryan Roberts ,  Chia-Wei Su ,  Michael David Trantham ,  Charles Eric Covington

IPC: B64C27/12 ,  B64D35/08 ,  F16D41/04

Abstract: A multimode clutch assembly is positioned in a powertrain of a rotorcraft. The clutch assembly includes a freewheeling unit having a driving mode in which torque applied to the input race is transferred to the output race and an overrunning mode in which torque applied to the output race is not transferred to the input race. A bypass assembly has an engaged position that couples the input and output races of the freewheeling unit. An actuator assembly shifts the bypass assembly between engaged and disengaged positions. An engagement status sensor is configured to determine the engagement status of the bypass assembly. In the disengaged position, the overrunning mode of the freewheeling unit is enabled such that the clutch assembly is configured for unidirectional torque transfer. In the engaged position, the overrunning mode of the freewheeling unit is disabled such that the clutch assembly is configured for bidirectional torque transfer.