Strategy employing exhaust back-pressure for burning soot...

Details Strategy employing exhaust back-pressure for burning soot... Strategy employing exhaust back-pressure for burning soot...

F - Mech Eng,Light,Heat,Weapons

01

N

F01N 3/023 (2006.01) F01N 9/00 (2006.01)

Patent

CA 2516394

An exhaust system (16) of a diesel engine (10) has a diesel particulate filter (18) for treating exhaust gas. When trapped soot has accumulated to an extent that may affect performance of the filter, an engine control system (12) forces combustion of trapped soot by increasing exhaust back-pressure using a control device (20) such as a back-pressure control valve or vanes of a variable geometry turbocharger.

L'invention concerne un système d'échappement (16) d'un moteur diesel (10) possédant un filtre à particules à gazole (18) destiné à traiter les gaz d'échappement. Lorsque la suie piégée s'est accumulée jusqu'à affecter la performance du filtre, un système de commande de moteur (12) force la combustion de la suie piégée en augmentant la contre-pression d'échappement au moyen d'un dispositif de commande (20), notamment une ou plusieurs vannes de commande de la contre-pression d'un turbocompresseur à géométrie variable.

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