Method and device for determining longitudinal tire stiffness
US12397798B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 2023 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Jul 11, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W30/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method for determining a longitudinal tire stiffness (Kx) for at least one wheel on a motor vehicle while the motor vehicle is in operation, may include generating a sinusoidal modulation of an axle drive torque or wheel drive torque necessary for maintaining the current vehicle speed (v), or a braking torque or recuperation torque necessary for maintaining the current braking power in at least one wheel for a sinusoidal excitation of a wheel rotational rate (ω), such that a sinusoidal oscillation in the wheel rotational rate is induced. The method may also include detecting the resulting sinusoidal oscillation in the wheel rotational rate, determining the amplitude (ωamp) of the oscillation in the wheel rotational rate induced, and determining longitudinal tire stiffness (Kx) from the amplitude (ωamp). A corresponding apparatus for carrying out the method may be included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.