External exhaust gas recirculation on board diagnostic using EGR effect on a combination of engine operating parameters
US6848418B1 · kind B1 · utility
16Cited by
14References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 10, 2003 |
| Grant date | Feb 1, 2005 |
| Priority date | — |
| Expiry date | Nov 10, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system is described for determining degradation of an exhaust gas recirculation system of an internal combustion engine. This method utilizes a combination of parameters to accurately determine degradation of the exhaust gas recirculation system. For example, the system utilizes changes in intake manifold pressure, changes in idle speed control operation, changes in ignition timing, and fueling changes to accurately determine operation of the exhaust gas recirculation system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.