Apparatus, system, and method for regenerating an exhaust gas treatment device
US8156732B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2006 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Apr 17, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
An apparatus, system, and method are disclosed for regenerating an exhaust gas treatment device. A controller module directs an injector to provide reductant to an exhaust gas treatment device over a plurality of rich intervals during a regeneration cycle. In addition, the controller module directs the injector to reduce the reductant provided to the exhaust gas treatment device over a lean interval between the rich intervals to create a lean environment within the exhaust gas treatment device. In one embodiment, the controller module modifies the reductant provided during each rich interval, the number of rich intervals, the length of the rich intervals, and the length of the lean intervals in response to an exhaust gas state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.