Method and device for regenerating a soot filter of a diesel combustion engine
US5079917A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Dec 14, 2010 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02B3/06
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
The invention relates to a method for regenerating a soot filter of a Diesel combustion engine. For the burning of soot deposited on the filter two coupled Helmholtz resonators are provided with the exhaust gases being introduced into the resonance pipes at their center portion. The timed ignition of the burners generates pressure waves in the system which may oscillate. When the top of a pressure wave is reached in one of the resonance housings, the temperature rises due to the adiabatic compression process such that the soot is ignited in the down-stream filter. Thereby the filter is regenerated due to the burning of soot. The burners are ignited in phase opposition so that the pressure waves generated by the burners are eliminated by interference at the location of the opening of the exhaust gas line into the resonance pipes. An increase of the counter pressure in the exhaust gas line due to negative feedback of the pressure waves is thereby prevented.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.