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honeycomb structure

A honeycomb structure and shell technology, applied in the field of honeycomb structure, can solve the problems of increased exhaust gas pressure loss and no contribution to exhaust gas purification

Inactive Publication Date: 2019-12-31
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the pressure loss of the exhaust gas tends to increase more
Also, since the exhaust gas does not flow in the blocked chamber, the catalyst in the blocked chamber does not contribute to the purification of the exhaust gas

Method used

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Experimental program
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Effect test

no. 1 approach

[0033] Use the following Figure 1 to Figure 11 Embodiments regarding the above-mentioned honeycomb structure are described. The honeycomb structure 1 according to the present embodiment is used to purify exhaust gas g. Such as figure 1 and figure 2 As shown, the honeycomb structure 1 comprises an outer shell 2 , partition walls 3 and a plurality of cells 4 . The housing 2 has a cylindrical shape. Some partition walls 3 are formed in the housing 2, and respectively have a quadrangular lattice form. A plurality of chambers 4 form flow passages of exhaust gas g and are surrounded by partition walls 3 .

[0034] The plurality of chambers 4 have an inner chamber 4a and an outer chamber 4b. Some inner chambers 4a are formed in an area that is an inner part of the honeycomb structure and includes the central axis A of the honeycomb structure. Some outer chambers 4b are placed outside the area where the inner chambers 4a are formed. The opening area of ​​the outer chamber 4b...

no. 2 approach

[0067] In the reference numerals used in the drawings related to the following embodiments, the same reference numerals as in Embodiment 1 are used to denote the same constituent elements as in Embodiment 1 unless otherwise specified.

[0068] This embodiment is an example in which the configuration of the reinforcing member 7 is changed. Such as Figure 12 As shown, in this embodiment, the reinforcement member 7 has a non-circular shape. Regarding the non-circular shape of the remaining reinforcement member 7, the reinforcement member 7 in this embodiment has the same configuration and function as in Embodiment 1.

no. 3 approach

[0070] This embodiment is an example in which the area of ​​the reinforcing member 7 is changed by position. Such as Figure 13 As shown, in the present embodiment, two angles θ1 and θ2 are formed by the radial direction of the housing 2 and the respective two partition walls 3 crossing each other. When the smaller of the two angles θ1 and θ2 is approximately the predetermined angle θ th (22.5°), the area of ​​the reinforcing member 7 is minimized when viewed in the axial direction of the honeycomb structure. In addition, if Figure 14 As shown, when the smaller of the two angles θ1 and θ2 is about 45°, the area of ​​the reinforcement member 7 is maximized.

[0071] Figure 15 is a schematic diagram showing the relationship between the area of ​​the reinforcing member and the smaller of the two angles θ1 and θ2. Such as Figure 15 As shown, in the present embodiment, as the smaller of the two angles θ1 and θ2 increases from 22.5° to 45°, the area of ​​the reinforcing mem...

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Abstract

The invention relates to a honeycomb structure (1) with a cylindrical outer shell (2) and partitions (3) and a plurality of chambers (4) and partitions (5). Multiple intersection points (6) of two partition walls (3) that cross each other are placed in the housing (2). Some intersections (6) are reinforced by reinforcing components (7). The two angles θ1 and θ2 are formed by the radial direction of the housing (2) and the respective two partition walls (3) crossing each other. The smaller of the two angles θ1 and θ2 is greater than the predetermined angle θ th . Furthermore, some reinforcing elements (3) are each formed only at some intersection points (6) placed in the vicinity of the partitions (5).

Description

technical field [0001] The present invention relates to a honeycomb structure used as a catalyst carrier for purifying exhaust gases. Background technique [0002] For example, as shown in Japanese Unexamined Patent Application No. 2014-136211, a honeycomb structure having partition walls is known as a catalyst carrier for purifying exhaust gas emitted from automobiles and the like. The partition has a polygonal lattice pattern. The honeycomb structure has a plurality of cells forming flow passages for exhaust gas, which are formed surrounded by partition walls. The honeycomb structure is installed in the exhaust pipe. When the high-temperature exhaust gas flows through the plurality of chambers, the temperature of the partition walls increases, and the catalyst carried on the partition walls is activated. Thereby, harmful substances in the exhaust gas are purified. [0003] The plurality of chambers are divided into inner chambers and outer chambers. The inner chamber ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/28B01J35/04B01J32/00
CPCF01N3/2803F01N2330/02B01J35/56B01D53/94
Inventor 村田雅一
Owner DENSO CORP