Method of estimating the fuel/air ratio in a cylinder of an internal-combustion engine
US7086391B2 · kind B2 · utility
4Cited by
9References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2005 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Mar 7, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/1417
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a method of estimating the fuel/air ratio in each cylinder of a multicylinder internal-combustion engine comprising an exhaust circuit in which a single detector measures the fuel/air ratio of the exhaust gas. The estimator comprises a physical model (RTM) representing the expulsion of the gases from the cylinders and the travel thereof in the exhaust circuit to the detector, the model being coupled with a non-linear state observer of Extended Kalman Filter (KF) type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.