System and methods for operating an exhaust gas recirculation valve based on a temperature difference of the valve
US9664129B2 · kind B2 · utility
4Cited by
4References
20Claims
0Family size
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Key dates
| Filing date | Feb 6, 2015 |
| Grant date | May 30, 2017 |
| Priority date | — |
| Expiry date | Jul 26, 2035 |
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 determining changes in a flow area of an exhaust gas recirculation (EGR) valve for EGR flow estimates due to a change in temperature difference between a stem and body of the EGR valve. In one example, a method includes adjusting an EGR valve based on an estimate of EGR flow, the EGR flow estimated based on a pressure difference across the EGR valve and an adjusted valve flow area. The adjusted valve flow area may be based on the temperature difference between the stem and body of the EGR valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.