Systems and methods for exhaust catalyst temperature control
US9297320B2 · kind B2 · utility
13Cited by
40References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 25, 2014 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Oct 7, 2034 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Methods and systems are provided for exhaust catalyst temperature control by metering exhaust bypass flow from a dedicated EGR cylinder. A continuously variable bypass valve may be adjusted to vary an amount of exhaust directed to an exhaust catalyst from a dedicated EGR cylinder via a bypass passage relative to exhaust recirculated to the engine intake via an EGR passage. At lower catalyst temperatures, more exhaust is metered via the bypass passage to enable catalyst temperature to be maintained above an activation level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.