EXHAUST-GAS CLEANING FILTER

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EP 3 919 167 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:
	09.03.2022 Bulletin 2022/10

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

(21)	Application number: 20794552.8

(22)	Date of filing: 16.03.2020

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International Patent Classification (IPC):

B01J 35/04^(2006.01)
F01N 3/022^(2006.01)
F01N 3/24^(2006.01)

B01D 53/94^(2006.01)
F01N 3/035^(2006.01)
F01N 3/28^(2006.01)

(52)	Cooperative Patent Classification (CPC):
	F01N 3/022; F01N 3/035; F01N 3/24; F01N 3/28; B01D 2255/102; B01D 2255/9205; B01D 2255/407; B01D 2255/2065; B01D 2255/20715; B01D 2255/2092; B01D 53/944; B01D 53/9431

(86)	International application number:
	PCT/JP2020/011408

(87)	International publication number:
	WO 2020/217775 (29.10.2020 Gazette 2020/44)

(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

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Priority:

26.04.2019 JP 2019086488

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

(72)	Inventors:
	KAYAMA Hiroaki Kariya-city, Aichi 448-8661 (JP) KOIKE Kazuhiko Nisshin-city, Aichi 470-0111 (JP)

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

(54)	EXHAUST-GAS CLEANING FILTER

(57) Provided is an exhaust gas purifying filter used with a HC purifying catalyst carried thereon. Numerous pores (121) are formed in partitions (12) of the exhaust gas purifying filter. In a cross-section of the partition, pores (121) are open at a passage surface (125a) and have an open end (126) of which the opening diameter (A₁) is 50µm or larger. In the cross-section of the partitions, the partitions (12) include a narrow part (127) where a pore diameter is 5µm or more and the pore diameter becomes a minimum in a region (A). In the cross-section of the partitions, the region (A) is positioned between a pair of virtual lines L₁ and L₂ extending from opposing sides of the opening end (126) to a passage surface (125a) positioned opposite to the opening end along the wall thickness direction X, Z. The pore diameter (A₂) at the narrow part (127) is 6% or more and less than or equal to 20% of the opening diameter (A₁).