| 摘要 |
There is disclosed a honeycomb filter in which partition walls are provided with PM collection layers having a small average pore diameter, and coated with a catalyst, whereby a regeneration efficiency is increased. The honeycomb filter has a constitution of a catalyst loading filter made of a base material of a honeycomb structure including a plurality of cells as through channels of an exhaust gas which are partitioned by partition walls made of a porous ceramic material having a large number of pores 5, and the filter includes plugging portions which alternately plug one opening end and the other opening end of each of the plurality of cells. Partition walls 4 are provided with PM collection layers 20 having a smaller average pore diameter than that of the partition walls, and the partition walls are coated with a catalyst 15 without coating a portion including a surface of the PM collection layer 20 with the catalyst. |
