US 11,655,053 B2
Method for determining a recommended inflation pressure for an aircraft tire, and associated maintenance methods
Michael Arnoux, Clermont-Ferrand (FR); and Eric Carin Neba, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR); SAFRAN, Paris (FR); SAFRAN LANDING SYSTEMS, Velizy-Villacoublay (FR); and SAFRAN ELECTRONICS & DEFENSE, Boulogne-Billancourt (FR)
Appl. No. 16/759,539
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR); SAFRAN, Paris (FR); SAFRAN LANDING SYSTEMS, Velizy-Villacoublay (FR); and SAFRAN ELECTRONICS & DEFENSE, Boulogne-Billancourt (FR)
PCT Filed Oct. 26, 2018, PCT No. PCT/EP2018/079477
§ 371(c)(1), (2) Date Apr. 27, 2020,
PCT Pub. No. WO2019/081746, PCT Pub. Date May 2, 2019.
Claims priority of application No. 1760161 (FR), filed on Oct. 27, 2017.
Prior Publication US 2020/0277086 A1, Sep. 3, 2020
Int. Cl. B60C 23/00 (2006.01); B64F 5/60 (2017.01); B64F 5/40 (2017.01); B64C 25/36 (2006.01); B60C 23/02 (2006.01); B60C 23/04 (2006.01); B64D 45/00 (2006.01)
CPC B64F 5/60 (2017.01) [B60C 23/02 (2013.01); B60C 23/0479 (2013.01); B64C 25/36 (2013.01); B64F 5/40 (2017.01); B64D 2045/0085 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for determining an inflation pressure expected in an aircraft tire provided with a pressure and temperature sensor, the method comprising:
in a preliminary stage, recording a pressure P0 and a temperature T0 of the tire, measured at a time t0, in a memory of the pressure and temperature sensor;
at a moment t, measuring and comparing an internal air temperature Tm of the tire and an ambient air temperature Tamb; and
if the two temperatures are equal or substantially equal, determining a pressure expected at the moment t, Pexpected_hom, using Pexpected_hom=P0*Tm/T0; or
if the two temperatures are different, determining a pressure expected at the moment t, Pexpected_het, using Pexpected_het=F(Tm, P0, T0 and θ), where θ depends on a position of the pressure and temperature sensor in the tire at the moment t,
wherein F is a linear function where Pexpected_het(t)=A(θ)*(Tm(t)−T0)+P0, A(θ)=p1*θ+p2, and p1 and p2 are predetermined constants, or F is a polynomial function where Pexpected_het=A(θ)*(Tm(t)−T0)2+B(θ)*(Tm−T0)+P0 and A(θ) and B(θ) are predetermined polynomial functions.