Emissions control
US6799422B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 22, 2002 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Aug 22, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02A50/20
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method of controlling emissions from a fixed-speed internal combustion engine includes injecting a controlled flow of air into the exhaust between a first catalyst bed adapted to reduce HC and NOx emissions, and a second catalyst bed adapted to reduce CO emissions. The flow of air is controlled to optimize the level of CO emissions, preferably as a function of engine load or temperature. In a marine engine-generator set, the flow of air is controlled as a function of generator load or temperature of the exhaust mixture entering the second catalyst bed, and seawater is injected into the exhaust stream downstream of the catalysts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.