US 12,447,426 B2
Method and device for generating an alarm for monitoring an oil filter in an aircraft
Jean-Louis Muller, Moissy-Cramayel (FR); and Thibault Maxime Adrien Mallet, Moissy-Cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 18/547,642
Filed by SAFRAN AIRCRAFT ENGINES, Paris (FR)
PCT Filed Feb. 18, 2022, PCT No. PCT/FR2022/050292
§ 371(c)(1), (2) Date Aug. 23, 2023,
PCT Pub. No. WO2022/180327, PCT Pub. Date Sep. 1, 2022.
Claims priority of application No. 2101796 (FR), filed on Feb. 24, 2021.
Prior Publication US 2024/0131457 A1, Apr. 25, 2024
Prior Publication US 2024/0226783 A9, Jul. 11, 2024
Int. Cl. G08B 21/00 (2006.01); B01D 35/143 (2006.01); B64D 45/00 (2006.01)
CPC B01D 35/1435 (2013.01) [B64D 45/00 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for generating an alarm in an aircraft being implemented by an alarm-generating device installed in said aircraft including:
obtaining a position of a lever delivered by a position sensor at a setpoint to an engine of the aircraft;
obtaining a temperature delivered by a temperature sensor of said device and representative of a temperature of an oil inside an oil filter used to filter the oil injected into said engine by way of a circuit particularly including a reservoir, a feed pump, a heat exchanger and ducts connecting these different equipment items, said sensor being placed at an inlet of the engine downstream of the heat exchanger;
obtaining a differential pressure delivered by a pressure sensor at said oil filter; and
generating an alarm if the differential pressure exceeds an alarm threshold obtained as a function of said position of said lever and of said temperature, a non-volatile memory of said device including, for at least one position of the lever, a set of curves defining alarm thresholds for triggering said alarm, as a function of the temperature measured in the circuit by the sensor.