Vehicle speed estimation for 4WD vehicles under wheel-spinning situations
US8423258B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2012 |
| Grant date | Apr 16, 2013 |
| Priority date | — |
| Expiry date | Mar 29, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T2270/202
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Systems and methods for detecting wheel-spinning situations of a vehicle. One system includes a controller. The controller is configured to determine a speed of each wheel of the vehicle based on information received from a plurality of wheel speed sensors, to identify a second slowest wheel of the vehicle based on the speed of each wheel, to calculate a vehicle acceleration torque based on an acceleration of the second slowest wheel of the vehicle and a mass of the vehicle, to calculate a torque ratio based on the vehicle acceleration torque and a wheel drive torque, and to activate a traction control system when the torque ratio is greater than a predetermined threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.