Method and system for controlling a vehicle tire-to-road friction estimation
US10967874B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2018 |
| Grant date | Apr 6, 2021 |
| Priority date | — |
| Expiry date | Nov 26, 2038 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2552/40
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Method for controlling a vehicle, comprising: identifying an upcoming curve and determining its properties; determining current vehicle speed, vv, estimating friction, μe, between a tire of the vehicle and the road; estimating maximum allowable vehicle speed, vmax_e, when entering the curve based on the properties, speed and friction; if the current vehicle speed is higher than the estimated maximum allowable vehicle speed, determining that a friction measurement is required; if distance, dv, between the vehicle and a curve entrance is higher than a predetermined threshold distance, dT, and if a braking action is detected, performing a friction measurement during the braking action to determine current friction, μc; if a distance between the vehicle and the curve entrance is lower than the predetermined threshold distance, performing a friction measurement to determine a current friction; and determining a maximum allowable vehicle speed vmax_d based on the curve radius, speed and friction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.