초록

A honeycomb structure which includes an inlet end and an outlet end opposing each other and a plurality of cell channels extending along an axis from the inlet end to the outlet end, the cell channels having non-equal, square cross-sections, and an extrusion die for making the same.

대표청구항 ▼

1. A diesel particulate filter comprising a plugged, wall-flow honeycomb filter body composed of inlet and outlet cells formed by interconnecting interior porous walls, the inlet cells having a larger hydraulic diameter than the outlet cells, the inlet cells having four sides which are bordered by o

1. A diesel particulate filter comprising a plugged, wall-flow honeycomb filter body composed of inlet and outlet cells formed by interconnecting interior porous walls, the inlet cells having a larger hydraulic diameter than the outlet cells, the inlet cells having four sides which are bordered by outlet cells, wherein only a portion of the interior porous walls is common to both the inlet cells and the adjacent outlet cells.2. The diesel particulate filter of claim 1 wherein the honeycomb filter body is composed of a ceramic material.3. The diesel particulate filter of claim 2 wherein the ceramic material is cordierite.4. The diesel particulate filter of claim 2 wherein the ceramic material is silicon carbide.5. The diesel particulate filter of claim 1 wherein the first cell channels have a hydraulic diameter 1.1-2 times greater than the second cell channels.6. The diesel particulate filter of claim 1 wherein the first cell channels have a hydraulic diameter 1.3-1.6 times greater than the second cell channels.7. The diesel particulate filter of claim 1 wherein the inlet and outlet cells have a square cross-section.