US 12,434,515 B2
Method and apparatus for determining the condition of a vehicle tire
Armand Csordas, Rosenheim (DE); and Andrea Ficht, Roehrmoos (DE)
Assigned to Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
Appl. No. 17/801,885
Filed by Bayerische Motoren Werke Aktiengesellschaft, Munich (DE)
PCT Filed Feb. 12, 2021, PCT No. PCT/EP2021/053432
§ 371(c)(1), (2) Date Aug. 24, 2022,
PCT Pub. No. WO2021/170422, PCT Pub. Date Sep. 2, 2021.
Claims priority of application No. 10 2020 104 928.5 (DE), filed on Feb. 25, 2020.
Prior Publication US 2023/0081221 A1, Mar. 16, 2023
Int. Cl. B60C 23/04 (2006.01)
CPC B60C 23/0476 (2013.01) 9 Claims
OG exemplary drawing
 
1. An apparatus comprising:
a controller installed in a vehicle and that is operatively coupled to a pressure sensor, the controller also being configured to determine a condition of a first tire of a vehicle wherein, the controller also being configured, at a current point in time, to:
determine, on a basis of pressure measured values measured with the pressure sensor with respect to a tire pressure of the first tire at the current point in time and at a preceding point in time, a rate of change of the tire pressure of the first tire;
determine a reference rate based on a characteristic diffusion rate of a classified tire type, wherein the classified tire type comprises tires having similar diffusion characteristics determined from historical pressure change data;
compare the determined rate of change of the first tire to a-the reference rate;
determine the condition of the first tire on the basis of the comparison; and
generate an output, indicative of a condition of the first tire that is transmittable to at least one of: a vehicle user interface, a remote server, or a maintenance system, wherein the output is configured to initiate: i) a tire servicing action, ii) a replacement recommendation, or iii) a remaining tire life prediction.