Exhaust gas torch apparatus
US4359863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1980 |
| Grant date | Nov 23, 1982 |
| Priority date | — |
| Expiry date | Dec 22, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S55/30
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Apparatus for filtering combustible particles from an exhaust gas stream, and for periodically rejuvenating the filter bed and catalyst section thereof, by incinerating retained particles. At least a portion of an engine's exhaust gas stream is initially preheated for the purpose of raising the catalyst to a predetermined "lightoff" temperature. A small amount of a supplementary fuel is brought into heat exchange contact with portions of the filter interior or exterior to elevate this fuel to a suitable temperature. The heated supplementary fuel is then intermixed with the exhaust gas stream prior to the latter entering the catalyst section, thereby causing the fuel/gas mixture to react. Subsequent to initiation of the oxidation reaction, further preheating energy input to increase the exhaust gas to "lightoff" temperature, can be discontinued without affecting the combustible particle incineration rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.