Method of operating a diesel engine system having LNT and SCR aftertreatment devices
US9316137B2 · kind B2 · utility
0Cited by
3References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 12, 2013 |
| Grant date | Apr 19, 2016 |
| Priority date | — |
| Expiry date | Dec 12, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of operating a diesel engine 10 having LNT 11 and SCR 13 aftertreatment devices arranged in series to receive exhaust gas from the engine is disclosed in which the engine is operated in a rich early injection mode to generate ammonia in the LNT for storage in the SCR located downstream from the LNT. This reduces the amount of soot produced permitting longer operation of the engine in rich early injection mode and further may reduce the use of PGM material in the LNT and increase the amount of ammonia for use in the SCR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.