US 12,441,327 B2
Method for determining interface conditions between tire and ground, particularly to determine the onset of aquaplaning phenomena
Giovanni Blandina, Milan (IT); Mauro Pierallini, Milan (IT); Stefano Caserini, Milan (IT); and Davide Fassio, Milan (IT)
Assigned to Easy Rain I.S.p.A., Milan (IT)
Appl. No. 18/574,853
Filed by Easy Rain I.S.p.A., Milan (IT)
PCT Filed Jun. 27, 2022, PCT No. PCT/IB2022/055947
§ 371(c)(1), (2) Date Dec. 28, 2023,
PCT Pub. No. WO2023/275711, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 102021000017588 (IT), filed on Jul. 2, 2021.
Prior Publication US 2024/0294172 A1, Sep. 5, 2024
Int. Cl. B60W 40/064 (2012.01); B60W 40/107 (2012.01); B60W 50/14 (2020.01)
CPC B60W 40/064 (2013.01) [B60W 40/107 (2013.01); B60W 50/14 (2013.01); B60W 2520/105 (2013.01); B60W 2520/26 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A method for determining interface conditions between tire and ground in a motor vehicle to determine an onset of aquaplaning phenomena, comprising:
determining a reference longitudinal acceleration (aXPTMDL) of the vehicle,
measuring an actual longitudinal acceleration of the vehicle (aXCAN),
calculating a difference between said reference longitudinal acceleration and said actual longitudinal acceleration,
determining an additional drag (FD, PWTMDL_Drag_Level) at an interface between the tire and the ground on a basis of said difference, and a lift (FL) at the interface between the tire and the ground on a basis of said additional drag (FD),
determining a threshold force at which lifting of the tire from the ground occurs, and
comparing said lift with said threshold force and determining a degree of proximity of the interface conditions between the tire and the ground to an aquaplaning condition.