(19)
(11) EP 3 919 156 A8

(12) CORRECTED EUROPEAN PATENT APPLICATION
published in accordance with Art. 153(4) EPC

(15) Correction information:
Corrected version no 1 (W1 A1)

(48) Corrigendum issued on:
16.03.2022 Bulletin 2022/11

(43) Date of publication:
08.12.2021 Bulletin 2021/49

(21) Application number: 20847932.9

(22) Date of filing: 02.07.2020
(51) International Patent Classification (IPC): 
B01D 39/20(2006.01)
C04B 38/00(2006.01)
 B01D 46/00(2022.01)
F01N 3/022(2006.01)
(52) Cooperative Patent Classification (CPC):
B01D 39/20; C04B 38/00; B01D 46/2429; B01D 46/24492; B01D 46/24491; F01N 3/0222; F01N 2330/06
(86) International application number:
PCT/JP2020/025952
(87) International publication number:
WO 2021/020014 (04.02.2021 Gazette 2021/05)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 29.07.2019 JP 2019139121

(71) Applicant: DENSO CORPORATION
Kariya-shi, Aichi 448-8661 (JP)

(72) Inventors:
  • MIZUTANI Keisuke
    Nisshin-city, Aichi 470-0111 (JP)
  • KOIKE Kazuhiko
    Nisshin-city, Aichi 470-0111 (JP)
  • ISHIHARA Mikio
    Kariya-city, Aichi 448-8661 (JP)

(74) Representative: Kuhnen & Wacker Patent- und Rechtsanwaltsbüro PartG mbB 
Prinz-Ludwig-Straße 40A
85354 Freising
85354 Freising (DE)

   


(54) EXHAUST GAS PURIFICATION FILTER


(57) An exhaust gas purification filter (1) is configured to be disposed in an exhaust passage in a gasoline engine. The exhaust gas purification filter (1) includes partition walls (11) including a plurality of pores (110), a plurality of cells (12) partitioned by the partition walls (11), and sealing portions (13) alternately sealing ends of a plurality of the cells in the exhaust gas purification filter. The partition walls (11) each has a pore surface area of 100,000 m2/m3 or more in the partition wall (11), and satisfy A ≥ B where A(µm) is an average pore diameter of the partition wall (11), and B(µm) is an average surface opening diameter of the pores (110) in a partition wall (11) surface.