US 12,270,357 B2
Method and system for controlling a thrust reverser of an aircraft
Irène Bujon, Moissy-Cramayel (FR); and Jean-Loïc Hervé Lecordix, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 17/798,795
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Feb. 3, 2021, PCT No. PCT/FR2021/050197
§ 371(c)(1), (2) Date Aug. 10, 2022,
PCT Pub. No. WO2021/160953, PCT Pub. Date Aug. 19, 2021.
Claims priority of application No. 2001326 (FR), filed on Feb. 11, 2020.
Prior Publication US 2023/0160356 A1, May 25, 2023
Int. Cl. F02K 1/76 (2006.01)
CPC F02K 1/76 (2013.01) [F02K 1/763 (2013.01); F02K 1/766 (2013.01); F05D 2270/09 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for controlling a turbojet engine thrust reverser during an aborted aircraft takeoff, the thrust reverser comprising:
doors that are movable between a stowed position wherein the doors ensure continuity of an aerodynamic flow path, an overstowed position wherein the doors partially enter into the aerodynamic flow path and a deployed position wherein the doors divert at least a part of a flow passing through the aerodynamic flow path to generate a reverse thrust;
door actuators configured to move the doors between the stowed, overstowed and deployed positions;
a locking device for locking the doors in the stowed position, moveable between a locking position and an unlocking position;
a lock actuator configured to move the locking device between the locking and unlocking positions;
wherein, during said aborted aircraft takeoff, the method comprises:
decreasing an engine speed of the turbojet engine by following a setpoint value below a first engine speed threshold value, wherein, at said first engine speed threshold value, the aerodynamic forces being exerted on the doors are equal to forces developed by the door actuators, and wherein, during said aborted aircraft takeoff, the setpoint value of the engine speed is above the idle speed;
controlling, during said aborted aircraft takeoff, the door actuators so as to bring the doors into the overstowed position before the engine speed reaches the first engine speed threshold value;
controlling the lock actuator so as to bring the locking device into the unlocking position; and
when the locking device is in the unlocking position, controlling the door actuators so as to bring the doors into the deployed position.