AFTERTREATMENT SYSTEM WITH LEAN NOx TRAP FILTER

An aftertreatment system includes a first pipe section in fluid communication with an exhaust manifold on an internal combustion engine. A first aftertreatment device includes a housing and a porous substrate having substrate walls defining a plurality of flow channels including first channels obstructed at a first end of the substrate and second channels obstructed at a second end of the substrate opposite the first end. The first and second channels are interleaved and internal pore surfaces in the porous substrate form a plurality of internal pores. A passive NOx adsorption catalyst is deposited on the substrate walls and internal pore surfaces such that the mean porosity of the porous substrate is not greater than a particulate matter secondary grain size. A second aftertreatment device having an inlet is in fluid communication with the outlet of the first aftertreatment device. 后处理系统包括与内燃机上排气歧管流体连通的第一管部。第一后处理设备包括壳体和多孔基底，该多孔基底具有限定多个流动通道的基底壁，该流动通道包括阻挡在在基底第一端的第一通道和阻挡在与第一端相对的基底第二端的第二通道。第一和第二通道是交错的，并且多孔基底中的内孔