| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a honeycomb structural collecting filter for exhaust gas, in particular, available for a diesel particulate filter (DPF) collecting fine powdery materials (particulate) or the like in the exhaust gas from a diesel engine, in which the temperature rise is unified at the inside and the outside in using and re-generating and in which generation of defects such as crack by thermal stress and generation of adverse effect to a carried catalyst are effectively prevented. <P>SOLUTION: The honeycomb structure 1 has a structure arranged so that a plurality of cells 5 used for a flow passage of a fluid may be arranged in parallel to a center axis each other. The cell opening ratio at the cross section in a direction perpendicular to the center axis direction of at least one honeycomb segment 20 is continuously or stepwise enlarged toward the outer peripheral part from the center part. <P>COPYRIGHT: (C)2007,JPO&INPIT |
