公开(公告)号：US20200003094A1

公开(公告)日：2020-01-02

申请号：US16446978

申请日：2019-06-20

Applicant: DENSO CORPORATION

Inventor： Hiroaki KAYAMA

IPC: F01N3/022

Abstract: A honeycomb structure body has an outer skin, cells arranged in an inside of the outer skin, and partition walls having pores. The partition walls are arranged in the inside of the outer skin. Each of the cells is surrounded by the partition walls. The pores have communicating pores which communicate with each other adjacent cells. Exhaust gas emitted from an engine passes adjacent cells through the communicating pores. The number of the communicating pores is at a density of not less than 18000 [pores/0.25 mm2] before a catalyst is supported in the pores. An exhaust gas purification filter having the honeycomb structure body with the catalyst is arranged in an exhaust gas pipe to purify exhaust gas containing PM emitted from an engine.

公开(公告)号：US20220088521A1

公开(公告)日：2022-03-24

申请号：US17538596

申请日：2021-11-30

Applicant: DENSO CORPORATION

Inventor： Hiroaki KAYAMA

IPC: B01D46/00 ,  B01D46/24

Abstract: An exhaust gas purification filter includes a plurality of cells extending in a filter axial direction, a porous partition separating and defining the plurality of cells, and a sealing section sealing the plurality of cells alternately at both filter ends. In the exhaust gas purification filter, the partition has a void volume of a reduced dale, Vvv, and a material volume of a reduced peak, Vmp, as volume parameters determined in noncontact surface roughness measurement on a surface of the partition, with their total value being 1.8 μm3/μm2 or less.

公开(公告)号：US20220176298A1

公开(公告)日：2022-06-09

申请号：US17575309

申请日：2022-01-13

Applicant: DENSO CORPORATION

Inventor： Hiroaki KAYAMA

IPC: B01D46/24

Abstract: An exhaust gas purification filter includes a plurality of cells extending in a filter axial direction, a porous partition separating and defining the plurality of cells, and a sealing section sealing the plurality of cells alternately at both filter ends. The partition has a void volume of a reduced dale, Vvv, and a material volume of a reduced peak, Vmp, as volume parameters determined in noncontact surface roughness measurement on a surface of the partition, with their total value being more than 1.3 μm3/μm2 and 1.7 μm3/μm2 or less. The partition has a mean pore size of 12 μm or more and 20 μm or less. The partition also has a porosity of 50% or more and 75% or less.

公开(公告)号：US20200306743A1

公开(公告)日：2020-10-01

申请号：US16831947

申请日：2020-03-27

Applicant: DENSO CORPORATION

Inventor： Kazuhiko KOIKE ,  Keisuke MIZUTANI ,  Hiroaki KAYAMA

IPC: B01J35/04 ,  B01D46/24 ,  B01D53/94 ,  B01J23/42 ,  B01J23/44 ,  B01J23/46

Abstract: A honeycomb structure body has a skin part of a cylindrical shape and a honeycomb structural part formed with the skin part together in a monolithic body. The skin part and the honeycomb structural part have partition walls of a porous structure. The cells have first cells arranged adjacent to the skin part and second cells arranged adjacent to the first cells. The skin part, the first cells and the second cells form an outer peripheral section. A central section is arranged inside the outer peripheral section. The honeycomb structure body satisfies a relationship in which a thermal expansion coefficient of the outer peripheral section is greater than a thermal expansion coefficient of the central section.