| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a honeycomb filter which reduces pressure loss by increasing an opening factor at the end surface on the exhaust gas flow-in side without reducing the opening factor at the end surface on the exhaust gas flow-out side. <P>SOLUTION: The honeycomb filter is provided with a sealing channel on the flow-out side which is opened at the end surface on the exhaust gas flow-in side and seals the exhaust gas flow-out side, a sealing channel on the flow-in side which is opened at the end surface on the exhaust gas flow-out side and seals the exhaust gas flow-in side, and an intermediate sealing channel which opens both ends and seals an intermediate part which is separated in a channel direction from a sealing part of the sealing channel on the flow-out side and a sealing part of the sealing channel on the flow-in side. The relation of the number (A) of the sealing channels on the flow-out side, the number (B) of the sealing channels on flow-in side, the number (C) of the intermediate sealing channels and the total (N) of these is expressed by A/N≤1/2 and B≤C≤A. The sealing channel on the flow-out side is in contact with the sealing channel on the flow-in side through at least one surface of a partition wall constituting the sealing channel on the flow-out side. <P>COPYRIGHT: (C)2007,JPO&INPIT |
