Catalyst warm up control for diesel engine
US6804952B2 · kind B2 · utility
17Cited by
8References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2003 |
| Grant date | Oct 19, 2004 |
| Priority date | — |
| Expiry date | Feb 21, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/40
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Diesel engine is operated in a first warm-up mode in an early warm-up period after startup so as to accelerate activation of the catalyst, and then in a second warm-up mode in a late warm-up period after the early warm-up period so as to maintain activity of the catalyst. The first warm-up mode provides more energy to the catalyst with exhaust gases than the normal operation mode of the diesel engine. The second warm-up mode provides exhaust gases of higher temperature to the catalyst than the normal operation mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.