| 摘要 |
One aspect of the invention relates to a NOx trapping device for a vehicle exhaust system having a plurality of NOx adsorbers. The device has a mobile framework configured to hold the NOx adsorbers and move them in sequence through a plurality of positions. A manifold channels exhaust to one or more of the NOx adsorber positions. The mobile framework is adapted to move the NOx adsorbers in and out of position to receive the exhaust. The adsorbers can be regenerated while they are not receiving any exhaust. The invention facilitates the use of multiple NOx adsorbers in an exhaust system, particularly the use of more than two adsorbers. The invention avoids complex exhaust valving, which is normally associated with multiple adsorber systems. In one embodiment, treated exhaust and exhaust from an adsorber undergoing regeneration are combined and supplied to an SCR reactor or an oxidation catalyst.
|
