Catalyst heating with exhaust back-pressure
US8997457B2 · kind B2 · utility
6Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2012 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Apr 2, 2033 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Embodiments for controlling an exhaust back-pressure valve are provided. In one example, a method for operating an engine comprises closing an exhaust back-pressure valve in response to a component temperature, and adjusting intake and/or exhaust valve operation in response to closing the exhaust back-pressure valve to reduce cylinder internal exhaust gas recirculation (EGR). In this way, combustion stability may be maintained while the exhaust back-pressure valve is closed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.