Exhaust aftertreatment for NOx-containing exhaust from an internal combustion engine
US8857154B2 · kind B2 · utility
4Cited by
2References
11Claims
0Family size
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Inventor
Key dates
| Filing date | Jan 23, 2012 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Dec 14, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of treating NOx-containing exhaust from an internal combustion engine. An exhaust aftertreatment system has the following devices arranged in the following order downstream the exhaust manifold: a lean NOx trap (LNT), a particulate filter (PF) and a selective reduction catalyst (SCR) device. At least the LNT is located in the engine compartment. The SCR temperature at the input to, or in, the SCR is monitored to determine whether the aftertreatment system is to be operated in a cold mode or warm mode. Only during warm mode is reductant provided to the SCR, and during warm mode the LNT is not regenerated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.