Road friction coefficient estimating unit and road friction coefficient estimating method
US9242625B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 19, 2012 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Aug 2, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2230/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A road friction coefficient estimating unit calculates a tire sideslip angle and a cornering force, and estimates a road friction coefficient on the basis of the ratio of the calculated cornering force to the calculated tire sideslip angle. A vehicle travels on multiple road surfaces that differ in road friction coefficient, and tire sideslip angles and cornering forces on the road surfaces are detected in advance. The road friction coefficient estimating unit stores, in a memory, a correlation among the detected tire sideslip angles, the detected cornering forces, and the road friction coefficients in the form of numerical values or a mathematical expression, and estimates a road friction coefficient using the correlation stored in the memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.