Method and device for estimating a friction coefficient between a tire and a road surface
US6601435B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 2002 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Apr 19, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M17/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for estimating a friction coefficient between a tire of a vehicle and a road surface, which may be used in obtaining a safety distance for an adaptive vehicle, estimating the friction coefficient by using state variables that are measured by means of RPM sensors normally equipped on vehicles. A device for estimating a friction coefficient has a control section receiving signals from a braking/steering monitoring section and outputting the friction coefficient stored in a friction coefficient value storage when both or either of a braking action and a steering action are applied to the vehicle, and outputting the friction coefficient estimated by a friction coefficient estimator when the braking action and the steering action are not applied to the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.