F - Mech Eng,Light,Heat,Weapons – 01 – N
Patent
F - Mech Eng,Light,Heat,Weapons
01
N
F01N 3/02 (2006.01) F01N 3/021 (2006.01) F01N 3/027 (2006.01) F01N 3/28 (2006.01) F01N 13/02 (2010.01) F01N 13/04 (2010.01) F02B 3/06 (2006.01) F01N 7/02 (2006.01) F01N 7/04 (2006.01)
Patent
CA 2104675
An emissions control system for reducing particulates from exhaust gases from a diesel engine includes dual catalyzed diesel particulate filters in joint communication with the exhaust stream and a pair of heater elements each associated with one of the filters, through which exhaust gas is transmitted and uniformly heated. According to predetermined alternating heating sequence, the exhaust gas stream through first one of the pair of filters and then through the other is heated. The differing pressure differentials across the filters, determined by the heating sequence, effectively shift the major portion of the flow of exhaust gas between the filters, so that over the alternating heating sequence the heat generated by the heating elements is sufficient to clean the filters, without the requirement for any auxiliary source of combustion air or any mechanical switching means.
Le dispositif antipollution servant à réduire les particules dans les gaz d'échappement d'un moteur diesel inclut deux filtres à particules à catalyse tous deux en communication avec les gaz d'échappement et deux éléments chauffants chacun étant rattaché à l'un des filtres, à travers lesquels le gaz d'échappement est circulé et chauffé uniformément. Selon la séquence de chauffage en alternance prédéterminée, le gaz d'échappement, qui passe d'abord dans l'un des filtres et, ensuite, dans l'autre, est chauffé. Les différences de pression de part et d'autre des filtres, déterminées par la séquence de chauffage, répartissent efficacement la plus grande partie du gaz d'échappement entre les filtres, de sorte qu'au cours de la séquence de chauffage en alternance la chaleur produite par les éléments chauffants suffit à nettoyer les filtres, sans qu'aucune source auxiliaire d'air de combustion ni moyen mécanique de répartition soit nécessaire.
Engine Control Systems Ltd.
Ridout & Maybee Llp
LandOfFree
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