Patent · US Active

Tire-road friction estimation and mapping

US10773725B1 · kind B1 · utility

5Cited by

9References

22Claims

0Family size

Assignee

Apple Inc. · US

Inventors

Filip Ilievski · Belmont, US
Matisse J. Milovich · Cupertino, US
Christopher M. Miller · Cupertino, US
Budhadipta Dan · Medford, US
Jack E. Graves · Irving, US
Evan C. Cull · Sunnyvale, US
Irene Perali · San Francisco, US
Mira S. Misra · Los Gatos, US
Sheila P. Nabanja · Oakland, US
Lucian Ion · Santa Clara, US
James J. Reuther · San Francisco, US
Christy Fernandez Cull · Sunnyvale, US

Key dates

Filing date	Aug 22, 2018
Grant date	Sep 15, 2020
Priority date	—
Expiry date	Aug 22, 2038

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB60W2555/20
WIPO fieldTransport
WIPO sectorMechanical engineering

Abstract

A method includes determining temperature values for roadway areas ahead of a vehicle, determining lubricant state values for the roadway areas, and determining lubricant thickness values for the roadway areas. The method also includes determining a tire-road friction estimate for each of the roadway areas using the temperature values, the lubricant state values, and the lubricant thickness values, and defining a friction map that relates the tire-road friction estimates to the roadway areas. The method also includes determining a motion plan based at least in part on the friction map, and controlling the vehicle based on the motion plan.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.