公开(公告)号：US11840949B2

公开(公告)日：2023-12-12

申请号：US17487254

申请日：2021-09-28

Applicant: DENSO CORPORATION

Inventor： Kazuhiko Koike ,  Keisuke Mizutani ,  Kana Asaoku

IPC: F01N3/022 ,  B01D53/94 ,  B01D39/20 ,  B01D46/24 ,  B01J35/04

CPC classification number: F01N3/0222 ,  B01D39/2068 ,  B01D46/2429 ,  B01D46/24491 ,  B01D46/24492 ,  B01D53/94 ,  B01J35/04

Abstract: An exhaust gas purification filter includes a honeycomb structure part and sealing parts. The honeycomb structure part has a porous partition wall and a plurality of cells defined by the partition wall to form exhaust gas flow paths. The sealing parts seal alternately a gas inflow-side end face or a gas outflow-side end face of the cells. The exhaust gas purification filter includes fine pores with diameters of 10 μm or less measured by the mercury intrusion method that account for 5% or more of all pores by volume in the honeycomb structure part. The partition wall has a plurality of communication pores communicating between the cells adjacent to the partition wall and has constricted communication pore of which a largest diameter Φ1 and a smallest diameter Φ2 satisfy relationships Φ1≥50, 100×Φ2/Φ1≤20.

公开(公告)号：US11845033B2

公开(公告)日：2023-12-19

申请号：US17592206

申请日：2022-02-03

Applicant: DENSO CORPORATION

Inventor： Kana Asaoku

IPC: B01D46/24 ,  F01N3/022 ,  B01D39/20

CPC classification number: B01D46/249 ,  B01D46/2429 ,  B01D46/24491 ,  F01N3/0222 ,  B01D39/2068 ,  F01N2330/06 ,  F01N2330/30

Abstract: An exhaust gas purification filter includes a cell assembly including cells each having a quadrangular cross-sectional shape and a partition wall, seal members, and a skin member. The partition wall has a porosity P1 of 50% to 70%, and the skin member has a porosity P2 of 50% to 70%, the porosity P1 and the porosity P2 satisfy a relationship P1

公开(公告)号：US11845032B2

公开(公告)日：2023-12-19

申请号：US17573295

申请日：2022-01-11

Applicant: DENSO CORPORATION

Inventor： Kana Asaoku

IPC: B01D46/24

CPC classification number: B01D46/2462 ,  B01D46/247 ,  B01D46/249 ,  B01D46/2429 ,  B01D46/2444 ,  B01D46/2482 ,  B01D46/2498 ,  B01D46/24491

Abstract: An exhaust gas purification filter includes a cell assembly including cells and a partition wall, seal members, and a skin member. The partition wall has a porosity of 50% to 70%. The skin member has a thickness T of 0.3 mm to 1.0 mm. The partition wall includes crossing portions, each cell has at least one part of an outer periphery defined by a corresponding one of the crossing portions, the at least one part of the outer periphery is rounded to have a value of radius of curvature R being 0.02 mm to 0.6 mm A degree of distortion δ being a degree of change in the external dimensions of the filter in axial direction, is greater than 0 and is 1.5 mm or less. A value of a structural variable X, expressed by Equation 1 below, is 0.05 to 6, X=T×R/δ . . . Equation 1.