System and methods for adjusting an exhaust gas recirculation valve based on multiple sensor outputs
US9970348B2 · kind B2 · utility
1Cited by
4References
19Claims
0Family size
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Key dates
| Filing date | Feb 6, 2015 |
| Grant date | May 15, 2018 |
| Priority date | — |
| Expiry date | Nov 10, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods and systems are provided for adjusting an exhaust gas recirculation (EGR) valve based on a final EGR estimate. In one example, a method may include adjusting the EGR valve based on a final EGR flow estimate, the final EGR flow estimate based on a first EGR flow estimated with a differential pressure sensor across the EGR valve, a second EGR flow estimated with an intake oxygen sensor, and accuracy values of each of the first and second EGR flows. The accuracy value may be based on engine operating conditions during estimation of the first and second EGR flows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.