Nitrogen oxide trap purge controlling method for exhaust line in diesel engine of motor vehicle, involves detecting incomplete purge of nitrogen oxide trap situated on exhaust line of diesel engine
The method involves detecting incomplete purge of a nitrogen oxide trap situated on an exhaust line of a diesel engine. Quantity of reducers to be injected during subsequent purge of the trap for assuring complete purging of the trap, is estimated. A nitrogen oxide trap loading value measured by two...
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Format | Patent |
Language | English French |
Published |
16.04.2010
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Abstract | The method involves detecting incomplete purge of a nitrogen oxide trap situated on an exhaust line of a diesel engine. Quantity of reducers to be injected during subsequent purge of the trap for assuring complete purging of the trap, is estimated. A nitrogen oxide trap loading value measured by two nitrogen oxide sensors is compared with a nitrogen oxide trap loading value estimated by a loading model based on data provided by one of the sensors situated in upstream of the trap. Residual mass of nitrogen oxide is detected in the trap. An independent claim is also included for a device for controlling purge of a nitrogen oxide trap situated on an exhaust line of a diesel engine, comprising two sensors.
La présente invention concerne un procédé de pilotage de la purge d'un piège à oxydes d'azotes situé sur la ligne d'échappement d'un moteur diesel, deux capteurs pour mesurer la masse d'oxydes d'azote dans les gaz d'échappement étant disposés respectivement en amont et en aval dudit piège, caractérisé en ce qu'il comprend une étape (a) de détection d'une purge incomplète. Un autre objet de l'invention concerne un dispositif de pilotage de la purge d'un piège à oxydes d'azote situé sur la ligne d'échappement d'un moteur diesel, comprenant deux capteurs pour mesurer la masse d'oxydes d'azote dans les gaz d'échappement respectivement en amont et en aval dudit piège, caractérisé en ce qu'il comprend des moyens pour détecter une purge incomplète. |
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AbstractList | The method involves detecting incomplete purge of a nitrogen oxide trap situated on an exhaust line of a diesel engine. Quantity of reducers to be injected during subsequent purge of the trap for assuring complete purging of the trap, is estimated. A nitrogen oxide trap loading value measured by two nitrogen oxide sensors is compared with a nitrogen oxide trap loading value estimated by a loading model based on data provided by one of the sensors situated in upstream of the trap. Residual mass of nitrogen oxide is detected in the trap. An independent claim is also included for a device for controlling purge of a nitrogen oxide trap situated on an exhaust line of a diesel engine, comprising two sensors.
La présente invention concerne un procédé de pilotage de la purge d'un piège à oxydes d'azotes situé sur la ligne d'échappement d'un moteur diesel, deux capteurs pour mesurer la masse d'oxydes d'azote dans les gaz d'échappement étant disposés respectivement en amont et en aval dudit piège, caractérisé en ce qu'il comprend une étape (a) de détection d'une purge incomplète. Un autre objet de l'invention concerne un dispositif de pilotage de la purge d'un piège à oxydes d'azote situé sur la ligne d'échappement d'un moteur diesel, comprenant deux capteurs pour mesurer la masse d'oxydes d'azote dans les gaz d'échappement respectivement en amont et en aval dudit piège, caractérisé en ce qu'il comprend des moyens pour détecter une purge incomplète. |
Author | LEIGLON NATHALIE DI PENTA DAMIANO BENCHERIF KARIM |
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DocumentTitleAlternate | PROCEDE ET DISPOSITIF DE PILOTAGE DE LA PURGE D'UN PIEGE A OXYDES D'AZOTE. |
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Snippet | The method involves detecting incomplete purge of a nitrogen oxide trap situated on an exhaust line of a diesel engine. Quantity of reducers to be injected... |
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SubjectTerms | 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 |
Title | Nitrogen oxide trap purge controlling method for exhaust line in diesel engine of motor vehicle, involves detecting incomplete purge of nitrogen oxide trap situated on exhaust line of diesel engine |
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