Method for operating an exhaust emission control system having a SCR-catalyst and an upstream oxidation catalyst exhaust emission control component
US9038370B2 · kind B2 · utility
2Cited by
5References
18Claims
0Family size
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Key dates
| Filing date | Sep 4, 2009 |
| Grant date | May 26, 2015 |
| Priority date | — |
| Expiry date | Sep 2, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for operating an exhaust emission control system of a motor vehicle internal combustion engine, in the exhaust gas line of which an oxidation-catalytically active exhaust emission control component is arranged upstream of a SCR-catalyst is provided. An ageing state of the oxidation-catalytically active exhaust emission control component is determined by correlating a hydrocarbon fraction present in the exhaust emission upstream of the oxidation-catalytically active exhaust emission component with a simultaneous nitrogen oxide conversion of the SCR-catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.