Vehicle slip state determination system and traveling state control system
US7421328B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 2004 |
| Grant date | Sep 2, 2008 |
| Priority date | — |
| Expiry date | Jul 14, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W10/18
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle slip state determination system serves to calculate an estimated vehicle speed VB, an estimated vehicle deceleration in the vehicle speed DVB, and each of wheel speed differences between right front and rear wheels and between left front and rear wheels ΔVR, ΔVL, respectively. The wheel speed difference ΔVR, ΔVL are divided into three ranges, that is, range 1, range 2, and range 3 by the speed difference upper and lower limit values JVUP and JVLO, each of which is a linear function value with respect to the estimated vehicle deceleration DVB. In the ranges 1 and 3, the vehicle traveling on the road with the low friction coefficient μ is brought into the slip state where four wheels are slipped. If the wheel speed difference at a predetermined estimated vehicle deceleration deviates from a determination range defined by the upper and lower limit values, the slip state of the vehicle, that is, the condition where the vehicle is traveling on the road with the low friction coefficient μ is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.