Determining an ammonia mass flow between two SCR catalytic converters
US10364729B2 · kind B2 · utility
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Key dates
| Filing date | Jan 27, 2017 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Jul 3, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method for determining a mass flow of ammonia between two SCR catalytic converters disposed one after the other in an SCR catalytic converter system in an exhaust system, which comprises only one reduction agent dosing unit upstream of the first SCR catalytic converter, characterized in that the determination is carried out from the signal of a NOx sensor disposed between the two SCR catalytic converters and the signal of a NOx sensor disposed downstream of the second SCR catalytic converter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.