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OwnerJean-Claude Fayardinventor
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A method in which all or some of the particles contained in the exhaust gases of a diesel engine are retained on particle filters and burnt due to the action of a combustion catalyst. At least a part of the particle filters are obstructed when the temperature θg of the exhaust gases for filtration is equal to or less than a threshold temperature θs, so as to limit or avoid cooling of the obstructed part of the particle filters and to maintain the same at a temperature θo greater than or equal to θs up until the time when θg becomes greater than θs again and thus permit accelerated regeneration of the obstructed part of the particle filters. Also disclosed is an exhaust gas filtration device which permits the carrying out of the filtration method with continuous and regular regeneration of the particle filters.
A method for filtration of exhaust gases, whereby all or part of the particles present in said exhaust gases are retained on filtration means and are burnt by the action of a combustion catalyst, said method comprising
A device for filtration of exhaust gases comprising at least one catalysis means, means for filtration of said exhaust gases, disposed in a reaction chamber in the path of the exhaust gas stream produced by an engine, wherein the filtration means comprises at least two assemblies each comprising a catalyst support adjacent a filter cartridge equipped with a flow obstruction means, further comprising a means for recirculating the exhaust gases at the engine intake, the operation of which is associated with the cutoff of the flow in one or a plurality of the cartridges when the engine is not accelerated, so that the increase in backpressure generated automatically opens a valve that permits recirculation of the exhaust gases.
Dependencies are inferred from the claim text.