Internal combustion engine exhaust treatment having a single valve directing exhaust to dual NOx traps
US8136345B2 · kind B2 · utility
5Cited by
12References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 21, 2004 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Oct 15, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A single valve (23, 50) directs engine exhaust (11, 12) toward alternative NOx traps (19, 20) which are adjacent to either diesel particulate filters (40, 41) or low temperature water gas shift catalysts (63, 64). Syngas is either provided from a source (54) or by in-line catalytic partial oxidizers (23, 24) which may have diesel oxidation catalysts ahead of them in the flow and which receive fuel from the engine fuel source (26) through nozzles (27, 28).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.