Method for reducing NH3 release from SCR catalysts during thermal transients
US8713917B2 · kind B2 · utility
2Cited by
16References
22Claims
0Family size
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Key dates
| Filing date | Feb 12, 2008 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Oct 4, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A control system includes a temperature module that determines a temperature of a selective catalytic reduction (SCR) catalyst, a derivative module that determines a derivative of the temperature, and a dosing module that regulates a dosage of a reductant supplied to the SCR catalyst to regulate an engine out NOx level. A control module generates control signals based on the temperature derivative, wherein the control signals regulate an amount of reductant accumulated within the SCR catalyst to reduce reductant release from the SCR catalyst during thermal transients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.