Vehicle rollover detection and mitigation using rollover index
US7440844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 2005 |
| Grant date | Oct 21, 2008 |
| Priority date | — |
| Expiry date | Nov 24, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2710/20
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for determining likelihood of rollover of a vehicle and/or mitigating rollover of the vehicle is responsive to measured vehicle lateral acceleration and a measured one of vehicle roll rate and vehicle suspension displacements to derive estimates of roll angle and roll rate. First, preliminary, estimates of roll angle and roll rate are derived and used as pseudo-measurements in a dynamic, closed loop observer equation which represents a model of the vehicle in a first roll mode for roll angles small compared to a reference value indicating two wheel lift-off and a second roll mode for roll angles at least near a reference value indicating two wheel lift-off. The observer equation has parameters and gains with values for each mode stored as a function of roll angle index derived from measurements and pseudo-measured values. The observer equation produces second, improved values or roll angle and roll rate together indicating the likelihood of vehicle rollover. Rollover mitigating controls for brakes, active front steer, and/or active rear steer are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.