Methods for engine exhaust NOx control using no oxidation in the engine
US8745969B2 · kind B2 · utility
2Cited by
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21Claims
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Key dates
| Filing date | Sep 8, 2010 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Feb 10, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A powertrain includes an internal combustion engine having a combustion chamber and an aftertreatment system. A method for reducing NOx emissions in the powertrain includes monitoring an actual exhaust gas feedstream ratio of NO2 to NO, monitoring a desired exhaust gas feedstream ratio of NO2 to NO, comparing the actual and the desired exhaust gas feedstream ratios of NO2 to NO, and selectively initiating a NO2 generation cycle based upon the comparison of the actual and the desired exhaust gas feedstream ratios of NO2 to NO comprising injecting fuel mass into the combustion chamber after a primary combustion event.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.