US 12,404,782 B2
Method for starting an aircraft engine
Camel Serghine, Moissy Cramayel (FR); Olivier Robert, Moissy Cramayel (FR); Thomas Klonowski, Moissy Cramayel (FR); and Caroline Maud Léna Seve, Moissy Cramayel (FR)
Assigned to SAFRAN HELICOPTER ENGINES, Bordes (FR)
Appl. No. 18/004,577
Filed by SAFRAN HELICOPTER ENGINES, Bordes (FR)
PCT Filed Jul. 6, 2021, PCT No. PCT/FR2021/051241
§ 371(c)(1), (2) Date Jan. 6, 2023,
PCT Pub. No. WO2022/008834, PCT Pub. Date Jan. 13, 2022.
Claims priority of application No. 2007261 (FR), filed on Jul. 9, 2020.
Prior Publication US 2023/0243467 A1, Aug. 3, 2023
Int. Cl. F01D 25/20 (2006.01); F01D 19/00 (2006.01); F01D 25/10 (2006.01); F01D 25/18 (2006.01); F02C 7/06 (2006.01); F02C 7/26 (2006.01); F02C 7/268 (2006.01); F02C 7/275 (2006.01)
CPC F01D 25/20 (2013.01) [F01D 19/00 (2013.01); F01D 25/10 (2013.01); F01D 25/18 (2013.01); F02C 7/06 (2013.01); F02C 7/26 (2013.01); F02C 7/268 (2013.01); F02C 7/275 (2013.01); F16N 2210/08 (2013.01); F16N 2270/70 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for starting an aircraft engine, wherein said aircraft engine is coupled to a lubrication circuit comprising an oil pump system, said lubrication circuit being constructed and arranged to circulate oil which is passed to a supply line to be supplied to oil damping devices of the said aircraft engine, and wherein an operating mode of the aircraft engine comprises a stop mode and a standby mode characterised by low engine speed, said method for starting comprising, during a starting phase:
measuring an oil temperature, by a temperature detection device;
depending on said oil temperature measured, compared to a threshold temperature, and depending on the operating mode of said aircraft engine, selecting a starting oil flow profile from among a plurality of starting oil flow profiles, to be applied in said aircraft engine, said selection being performed by a calculator;
applying said starting oil flow profile selected by said oil pump system, said oil pump system being controlled by said calculator; and
circulating oil at pressure higher than a nominal value pressure in the oil damping devices in response to the oil temperature being measured above the threshold temperature and the engine operating mode being in standby mode, the oil dampening devices being fitted to the shaft lines of the turboshaft engine, and in response to this engine standby mode being over, supplying oil to the oil damping devices with a lower pressure than the pressure higher than the nominal value pressure.