Method and arrangement for tire to road friction estimation
US10144433B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 2016 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Feb 15, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2756/10
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The present disclosure relates to a method and arrangement for estimating a friction coefficient (μi) between tires of a wheeled two-axis two-track road vehicle and the ground. If the longitudinal velocity νx of the vehicle is above a first threshold νxthres and the wheel angle δf and/or the yaw rate Ωz are/is below a second threshold δthres/Ωzthres, a positive torque is applied to both wheels on a first axle and an and opposite, negative torque, to both wheels on a second axle while following driver requested longitudinal vehicle acceleration (ax). Wheel speeds ωi are measured and tire forces (fi) estimated. The friction coefficient (μi) between the tires and the ground are estimated from the measured wheel speeds ωi and the estimated tire forces (fi). The estimated friction coefficient (μi) is made available to other vehicle systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.