Title:
EXHAUST GAS PURIFICATION FILTER
Document Type and Number:
WIPO Patent Application WO/2020/202848
Kind Code:
A1
Abstract:
An exhaust gas purification filter (1) is installed in the exhaust channel of a gasoline engine. The exhaust gas purification filter (1) has a partition (11) that has a plurality of pores (110), a plurality of cells (12) that are divided by the partition (11), and a seal part (13) that alternately seals the plurality of cells (12) at both ends of the filter. The exhaust gas purification filter (1) is such that when A μm is the average pore size of the partition wall (11) and B μm is the average surface opening diameter in the surface of the partition wall (11), A≥B is satisfied, the ratio expressed by 100×(A-B)/B is 30% or less, and the tortuosity factor coefficient for the pores (110) inside the partition wall (11) is 6.0×103 to 12.5×103.
Inventors:
ISHIHARA MIKIO (JP)
MIZUTANI KEISUKE (JP)
MIZUTANI KEISUKE (JP)
Application Number:
PCT/JP2020/006165
Publication Date:
October 08, 2020
Filing Date:
February 18, 2020
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
B01D39/20; F01N3/022
Domestic Patent References:
| WO2016196709A1 | 2016-12-08 | |||
| WO2004113252A1 | 2004-12-29 | |||
| WO2013145314A1 | 2013-10-03 | |||
| WO2007097056A1 | 2007-08-30 |
Foreign References:
| JP2016524584A | 2016-08-18 |
Other References:
J. OHSERF. MUCKLICH: "Statistical Analysis of Microstructures in Materials Science", 2000, WILEY AND SONS, pages: 115
See also references of EP 3919152A4
See also references of EP 3919152A4
Attorney, Agent or Firm:
AICHI, TAKAHASHI, IWAKURA & ASSOCIATES (JP)
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