Exhaust aftertreatment filter with particulate distribution pattern
US6544310B2 · kind B2 · utility
60Cited by
25References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 24, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | May 24, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/30
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An exhaust aftertreatment filter and method is provided for filtering engine exhaust. Varying cell size is provided to spread trapped contaminant particulate along a distribution pattern reducing heat concentration and the risk of melting during regeneration, to minimize hot-spot meltdown otherwise caused by high density concentration of trapped particulate during regeneration. Cell size is varied by varying volume and/or height and/or width and/or length. Tapering of cells is also provided to change the cross-sectional area from the upstream to the downstream end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.