Dynamic EGR concentration estimation method for a motor vehicle engine
US6481423B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 2000 |
| Grant date | Nov 19, 2002 |
| Priority date | — |
| Expiry date | Jan 26, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved method of dynamically estimating the concentration of recirculated exhaust gases in air/fuel mixture of an internal combustion engine equipped with an exhaust gas recirculation (EGR) system. The EGR concentration at engine intake ports is separately estimated with static and dynamic models, and the EGR concentration for control purposes is determined by adjusting the result of the dynamic model based on a deviation of the dynamic model from the static model. This method provides the total EGR concentration, but can alternatively provide the inert EGR concentration through the inclusion of an exhaust inert ratio model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.