DISPOSITIF D'ELIMINATION D'OXYDES DE SOUFRE DANS UN SYSTEME DE PIEGEAGE D'OXYDES D'AZOTE

• Main Authors: POILANE EMMANUEL, LE MORVAN PIERRE YVES, BARRILLON PASCAL, VANNIER AXEL
• Format: Patent
• Language: French
• Published: 15.02.2013
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

One subject of the invention is a device for eliminating sulphur oxides in a system (5) for capturing nitrogen oxides positioned in the exhaust line (E) of an internal combustion engine (1) of a motor vehicle, the engine (1) being fed with air and with fuel, the device comprising control means (8) capable of initiating an elimination of sulphur oxides from the system (5) for capturing nitrogen oxides, by heating the system (5) for capturing nitrogen oxide above a predetermined temperature and by adjusting the richness, in terms of fuel, of the air/fuel mixture to a value greater than 1, the elimination of the sulphur oxides being accompanied by the emission of hydrogen sulphide, characterized in that the device also comprises a system (7) for capturing the hydrogen sulphide emitted, means for oxidizing the captured hydrogen sulphide, and means for measuring or estimating the temperature of the system (7) for capturing hydrogen sulphide, and in that said control means (8) are capable of initiating the elimination of the sulphur oxides when the measured or estimated temperature of the system (7) for capturing hydrogen sulphide is greater than or equal to a threshold value.