Method for the simultaneous desulfation of a lean NOx trap and regeneration of a Diesel particulate filter
US7197867B2 · kind B2 · utility
13Cited by
17References
10Claims
0Family size
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Key dates
| Filing date | Jul 1, 2005 |
| Grant date | Apr 3, 2007 |
| Priority date | — |
| Expiry date | Jul 1, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
High exhaust gas temperatures whereby sulfur is removed from a lean NOx traps simultaneously with regeneration of a Diesel particulate filter is provided by alternating engine operation in respectively defined lean and rich combustion modes. The duration and frequency of the respective lean and rich operating modes, as well as the air/fuel ratio during the respective modes, are preferably controlled by the sensed temperature of the lean NOx trap substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.