Filter unit for use in exhaust gas system of diesel internal combustion engine, has two groups of channels separated by filter walls, where cross-section of channels of one group is in form of star

摘要

The filter unit has an input surface (22) and an output surface (24). Two groups of channels (28, 30) are separated by filter walls (31) formed of open-porous material. The cross-section of channels of the group (28) is in the form of star, and the cross-section of channels of the group (30) is in the form of polygon. The channels of the group (28) are formed by four circular segment-shaped or polygon filter wall sections.