NOx aftertreatment system and method for internal combustion engines
US6732507B1 · kind B1 · utility
83Cited by
12References
3Claims
0Family size
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Key dates
| Filing date | Dec 30, 2002 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Dec 30, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A very high efficiency NOX aftertreatment system is provided for use in lean burn engines. A lean NOX adsorber is synergistically combined with a selective catalytic reduction catalyst to use the ammonia formed within the NOX adsorber, during regeneration of the NOX adsorber while periodically operating the engine in a fuel-rich combustion mode, to reduce NOX remaining in the exhaust gas stream after passage through the NOX adsorber during normal operation of the engine in a lean burn combustion mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.