Tire wear state estimation apparatus
US12246562B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 2021 |
| Grant date | Mar 11, 2025 |
| Priority date | — |
| Expiry date | Sep 8, 2043 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M17/02
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An estimation apparatus includes a rotation speed acquisition unit, a driving force acquisition unit, a slip ratio calculation unit, a slope calculation unit, and an estimation unit. The rotation speed acquisition unit sequentially acquires rotation speeds of the tires. The driving force acquisition unit sequentially acquires a driving force of the vehicle. The slip ratio calculation unit calculates a slip ratio based on the sequentially-acquired rotation speeds of the tires. The slope calculation unit calculates the slope of the slip ratio with respect to the driving force based on a large number of data sets of the slip ratio and the driving force, as a regression coefficient representing a linear relationship between the slip ratio and the driving force. The estimation unit estimates the wear state of the tires based on the slope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.