System and method for inhibiting regeneration of a diesel...

F - Mech Eng,Light,Heat,Weapons – 01 – N

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F01N 3/00 (2006.01) F01N 3/10 (2006.01)

Patent

CA 2645335

A system and method for initiation and control of passive regeneration (38) of a diesel particulate filter (34), and the integration of that regeneration strategy with an active regeneration strategy (36) and a strategy (40, 40A) for inhibiting passive regeneration. Passive regeneration can be initiated by driver actuation of an instrument panel device, such as a switch, while the vehicle is parked with the engine idling provided that certain conditions confirming that the vehicle is parked and the engine is at proper temperature are satisfied. Regeneration is inhibited by driver actuation of another switch for a maximum amount of time that may be shorter, or even prevented if DPF loading is too high.

L'invention concerne un système et un procédé pour déclencher et contrôler la régénération passive (38) d'un filtre à particules diesel (34) et l'intégration de cette stratégie de régénération avec une stratégie (36) de régénération active et une stratégie (40, 40A) pour inhiber la régénération passive. Le conducteur peut déclencher la régénération passive en actionnant un dispositif sur le tableau de bord, tel qu'un interrupteur, alors que le véhicule est stationné avec le moteur tournant au ralenti, pourvu que soient satisfaites certaines conditions confirmant que le véhicule est bien stationné et le moteur à une température convenable. La régénération est inhibée si le conducteur actionne un autre interrupteur pendant une durée maximale qui peut être plus brève, voire empêchée si la charge du FAP est trop élevée.

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