System and method for controlling an engine based on ammonia storage in multiple selective catalytic reduction catalysts
US9188071B2 · kind B2 · utility
2Cited by
16References
20Claims
0Family size
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Key dates
| Filing date | May 15, 2012 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Jul 29, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A system according to the principles of the present disclosure includes a storage estimation module and an air/fuel ratio control module. The storage estimation module estimates a first amount of ammonia stored in a first selective catalytic reduction (SCR) catalyst and estimates a second amount of ammonia stored in a second SCR catalyst. The air/fuel ratio control module controls an air/fuel ratio of an engine based on the first amount, the second amount, and a temperature of a substrate disposed in the second SCR catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.