Process and system for the oxidation of engine emission particulates deposited in a particulate filter trap
AssigneeFEV Forschungsgesellschaft fur Energie-Technik und Verbrennungsmotoren mbH
InventorsFranz Pischinger, Gerhard Lepperhoff
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Abstract
A process for the oxidation of a concentration of internal combustion engine emission particulates collected in a particulate filter trap by supplying secondary energy to the deposit at the inlet surface of the filter and/or to the particulate/exhaust gas mixture, includes adjusting the particulate concentration to a value which lies within the explosive range of the particulate/exhaust gas mixture by briefly adding, or recycling, combustible particulates to the exhaust gas flow in the filter, especially in front of the inlet face of the filter.
Claims24
A process for the oxidation of a concentration of internal combustion engine emission particulates collected in a particulate filter trap by supplying secondary energy to the deposit at an inlet surface of the filter and/or to the particulate/exhaust gas mixture, comprising the step of adjusting the concentration of particulates in one of:
- (a) in the filter;
- (b) in front of the inlet surface of the filter;
- and (c) in the filter and in front of the inlet surface of the filter, to a value that lies within the explosive range of the particulate/exhaust gas mixture, the adjusting step being carried out by one of:
- (aa) recycling combustible particulates;
- (bb) briefly introducing combustible particulates to the exhaust gas flow in front of the inlet face of the filter;
- and (cc) recycling combustible particulates and briefly introducing combustible particulates to the exhaust gas flow in front of the inlet face of the filter.
A system for the oxidation of a concentration of internal combustion engine exhaust gas particulates collected in a particulate filter trap having an inlet surface facing the exhaust gas flow from the engine, comprising means for supplying secondary energy to the deposit at the inlet surface of the filter and/or to the particulate/exhaust gas mixture, and means for briefly introducing combustible particulates to the exhaust gas flow in the filter especially at the inlet surface of the filter for adjusting the concentration of particulates to a value that lies within the explosive range of the particulate/exhaust gas mixture.
Dependencies are inferred from the claim text.