Method for the determination of rough road in vehicle with internal combustion engine mounted thereon
US5694901A · kind A · utility
10Cited by
2References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1996 |
| Grant date | Dec 9, 1997 |
| Priority date | — |
| Expiry date | Feb 26, 2016 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2200/702
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention relates to a method for the determination of a rough road in a vehicle with a multi-cylinder internal combustion engine (1) mounted thereon. With a view to economically performing determination of a rough road with high accuracy, a revolution variance (IAC,VAC) is detected with respect to each cylinder in the internal combustion engine (1). Based on detection of revolution variance states, each of which indicates a deterioration in combustion, in plural cylinders, the vehicle with the internal combustion engine (1) mounted thereon is determined or estimated to be running on a rough road.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.