Method and apparatus for managing an exhaust gas feedstream for a spark-ignition direct-injection engine
US8001768B2 · kind B2 · utility
4Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2008 |
| Grant date | Aug 23, 2011 |
| Priority date | — |
| Expiry date | Jun 24, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The disclosure sets forth operating a spark-ignition, direct-fuel injection internal combustion engine equipped with an exhaust aftertreatment system including a lean-NOx reduction catalyst upstream of a second converter element. The engine preferentially operates in one of a homogeneous charge combustion mode and a stratified charge combustion mode based upon temperature of the lean-NOx reduction catalyst. Exhaust gas flow is selectively diverted to the second converter element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.