# US 10,765,986 B2 · Plugged honeycomb structure

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- Number: US 10,765,986 B2
- Document ID: US10765986B2
- Status: Granted
- Kind: B2
- Application number: 15/704,393
- Filed: 2017-09-14
- Published: 2018-04-12
- Granted: 2020-09-08
- Earliest claimed: 2016-10-11
- Assignees: NGK Insulators, Ltd.
- Applicants: Ngk Insulators, Ltd.
- Inventors: Kazuya Mori; Mitsuhiro Ito
- Web page: https://patentgrep.com/patent/US10765986B2

## CPC

- B01D 46/247: {of the cells}
- B01D 46/2466: {of the adhesive layers, i.e. joints between segments}
- B01D 46/2474: {of the walls along the length of the honeycomb}
- B01D 46/2478: {Structures comprising honeycomb segments}
- B01D 46/2482: {Thickness, height, width, length or diameter}
- B01D 46/2484: {Cell density, area or aspect ratio}
- B01D 46/2486: {characterised by the shapes or configurations}
- B01D 2279/30: for treatment of exhaust gases from IC Engines
- F01N 3/0222: {the structure being monolithic, e.g. honeycombs}
- F01N 2260/06: for improving exhaust evacuation or circulation, or reducing back-pressure
- F01N 2260/18: for improving rigidity, e.g. by wings, ribs
- F01N 2330/30: Honeycomb supports characterised by their structural details
- F01N 2330/32: characterised by the shape, form or number of corrugations of plates, sheets or foils
- F01N 2330/34: with flow channels of polygonal cross section
- Y02T 10/12: Improving ICE efficiencies
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- F01N: GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES (arrangements in connection with gas exhaust of propulsion units in vehicles B60K13/00; combustion-air intake silencers specially adapted for, or arranged on, internal-combustion engines F02M35/00; protecting against, or damping, noise in general G10K11/16)
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

The plugged honeycomb structure includes a plurality of honeycomb segments, a bonding layer, and plugging portions which plug open ends of cells of each honeycomb segment, and in the honeycomb segment, at least two types of cells having different sectional shapes are formed to constitute predetermined repeated arrangement patterns, and a ratio of a value R2s obtained by dividing an average sectional area S2in of inflow cells by an average sectional area S2out of outflow cells in a partial rim circumferential wall cell region is in a range of 1.7 times or more and 2.0 times or less to a value R1s obtained by dividing an average sectional area S1in of the inflow cells by an average sectional area S1out of the outflow cells in a whole rim partition wall cell region.

## Claims

### Claim 1

A plugged honeycomb structure comprising: a plurality of prismatic columnar honeycomb segments; a bonding layer bonding side surfaces of the plurality of honeycomb segments to one another, and
plugging portions arranged in open ends of predetermined cells in an inflow end face of each honeycomb segment and arranged in open ends of residual cells in an outflow end face thereof,
wherein each honeycomb segment has porous partition walls arranged to surround a plurality of cells extending from the inflow end face to the outflow end face, and segment circumferential walls arranged at an outermost circumference, in a cross section of the honeycomb segment which is perpendicular to an extending direction of the cells, at least two types of cells having different shapes are formed to constitute predetermined repeated arrangement patterns,
the cells including the plugging portions arranged on the side of the inflow end face are defined as outflow cells, and the cells including the plugging portions arranged on the side of the outflow end face are defined as inflow cells,
the cells of the honeycomb segment include whole rim partition wall cells and partial rim circumferential wall cells,
the whole rim partition wall cells are the cells having whole rims of the cells which are surrounded by the partition walls,
the partial rim circumferential wall cells are the cells having rims of the cells which are surrounded by the partition walls and the segment circumferential walls,
a shape of the cross section of each partial rim circumferential wall cell which is perpendicular to the cell extending direction includes a shape of at least a part of the whole rim partition wall cell, and
when a value obtained by dividing an average sectional area S1in of the inflow cells by an average sectional area S1out of the outflow cells in a region where the whole rim partition wall cells are present is denoted R1s, and
a value obtained by dividing an average sectional area S2in of the inflow cells by an average sectional area S2out of the outflow cells in a region where the partial rim circumferential wall cells are present is denoted R2s,
a ratio of the R2s to the R1s is in a range of 1.7 times or more and 2.0 times or less.

### Claim 2 (depends on 1)

The plugged honeycomb structure according to claim 1,
wherein except for a circumferential region of the honeycomb segment where the partial rim circumferential wall cells are formed, the plugging portions are arranged in the open ends of the cells of the honeycomb segment so that the inflow cells surround the outflow cell.

### Claim 3 (depends on 1)

The plugged honeycomb structure according to claim 1,
wherein a thickness of the segment circumferential wall of the honeycomb segment is from 0.3 to 1.0 mm.

### Claim 4 (depends on 1)

The plugged honeycomb structure according to claim 1, wherein a thickness of the bonding layer is from 0.5 to 1.5 mm.

### Claim 5 (depends on 1)

The plugged honeycomb structure according to claim 1,
wherein when the shortest distance in mutual distances between two facing partition walls in the inflow cells is defined as a cell open width,
an average value of the cell open widths of the inflow cells is 0.5 mm or more.

### Claim 6 (depends on 1)

The plugged honeycomb structure according to claim 1,
wherein the average sectional area S2in of the inflow cells in the region where the partial rim circumferential wall cells are present is 4 mm2 or less.

### Claim 7 (depends on 1)

The plugged honeycomb structure according to claim 1,
wherein in the region where the whole rim partition wall cells are present, each of the inflow cell and the outflow cell has one type of sectional shape.