Title:
HONEYCOMB FILTER
Document Type and Number:
Japanese Patent JP2022152976
Kind Code:
A
Abstract:
To provide a honeycomb filter having excellent trapping performance for trapping particulate matter contained in exhaust gas and excellent purification performance for purifying harmful components contained in the exhaust gas.SOLUTION: The honeycomb filter includes: a honeycomb structure 4 having a porous partition wall 1; and a plugging portion 5 disposed to seal any one end of a cell 2. The honeycomb structure 4 has, in the extending direction of the cell 2 of the honeycomb structure 4: an inflow side region 15 including a range of up to at least 30% of the total length L1 of the honeycomb structure 4 starting from an inflow end face 11 of the honeycomb structure 4; and an outflow side region 16 including a range of up to at least 20% of the total length L1 of the honeycomb structure 4 starting from an outflow end face 12 of the honeycomb structure 4. An average pore diameter of the partition wall 1 in the inflow side region 15 is 15 to 20 μm, and an average pore diameter of the partition wall 1 in the outflow side region 16 is 9 to 14 μm.SELECTED DRAWING: Figure 4
Inventors:
YOSHIOKA FUMIHIKO
ISHIDA SACHIKO
ISHIDA SACHIKO
Application Number:
JP2021055958A
Publication Date:
October 12, 2022
Filing Date:
March 29, 2021
Export Citation:
Assignee:
NGK INSULATORS LTD
International Classes:
B01D46/00; B01D53/94; B01J23/44; B01J35/04; B01J35/10; F01N3/022; F01N3/035; F01N3/10; F01N3/24; F01N3/28
Attorney, Agent or Firm:
Ippei Watanabe
Koike Shigeru
Koike Shigeru
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