Vehicle dynamic control system
US6188316A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 11, 1999 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Mar 11, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2556/50
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Recognizing curve geometry, judgement accuracy of an over speed condition is improved with minimal increase of calculation load, even when the road to an objective curve is not a straight line. The standard deceleration calculator calculates a standard deceleration from the road surface friction coefficient and road slope. The permissible access speed calculator calculates a permissible access speed from the permissible lateral acceleration based on road geometry and the road surface friction coefficient. The equivalent linear distance calculator calculates an equivalent linear distance, converting a winding part of a road to the objective curve into an equivalent straight line. The passing judgement device compares a required deceleration, which is determined based on the present vehicle speed, the permissible access speed and the equivalent linear distance, with a warning deceleration level and a forced deceleration level, which are calculated from the standard deceleration. According to the comparison result, the warning deceleration controller carries out a warning control through the display and a loudspeaker and forced deceleration control by the engine control unit, the tran…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.