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Honeycomb for an exhaust treatment unit

A technology for exhaust gas treatment and honeycomb body, which can be used in exhaust devices, thin material treatment, engine components, etc., and can solve the problems of honeycomb body function failure, brazing connection extension, and change of honeycomb body thermal expansion performance.

Inactive Publication Date: 2008-11-12
EMITEC EMISSIONSTECHNIK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has not been adequately taken into account so far that there may be conditions that cause the brazed connection to eventually extend into the Situations outside the desired area
The expansion of such brazed joints beyond the desired area results in changes in the thermal expansion properties of the honeycomb which may lead to functional failure of the honeycomb

Method used

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  • Honeycomb for an exhaust treatment unit
  • Honeycomb for an exhaust treatment unit
  • Honeycomb for an exhaust treatment unit

Examples

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Embodiment Construction

[0034] figure 1 A honeycomb body 1 for an exhaust gas treatment unit 2 is schematically shown in partial cross-section. The honeycomb body 1 comprises a honeycomb structure 3 and a housing 4 which completely surrounds the honeycomb structure 3 . A region 5 for forming a brazed connection 6 is provided between the honeycomb structure 3 and the housing 4 . Here, the region 5 of the brazed connection 6 is positioned closer to the second end face 14 than to the first end face 13 . In addition, the honeycomb body 1 has two different structures for delimiting the brazed connection 6 , namely a groove 7 formed circumferentially in the shell 4 and a ceramic material arranged on the outside near the first end face 13 of the honeycomb structure 3 . Coating9.

[0035] In order to produce such a honeycomb body 1 , the region 5 of the brazed connection 6 is first selected adjacent to the second end face 14 . It is then determined that the honeycomb structure 3 is inserted into the hous...

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Abstract

Honeycomb (1) for an exhaust treatment unit (2) having at least one honeycomb structure (3) and a least one housing (4), which at least partially surrounds the at least one honeycomb structure (3), at least one region (5) between the honeycomb structure (3) and the housing (4) being formed with a brazed joint (6), wherein at least two separate means (7, 9) for delimiting the brazed joint (6) are provided. Furthermore, a method for producing a corresponding honeycomb is also proposed.

Description

technical field [0001] The invention relates to a honeycomb body for an exhaust gas treatment unit, comprising at least one honeycomb structure and at least one housing at least partially surrounding the at least one honeycomb structure. The invention relates in particular to the formation of a brazed connection between the honeycomb structure and the housing. Such honeycomb bodies are frequently used for cleaning exhaust gases in motor vehicles. Background technique [0002] Such honeycomb bodies generally have a metallic or ceramic honeycomb structure. Although the following (aspects) generally also apply to ceramic honeycomb structures, metal honeycomb structures which are fastened on or in the housing by means of brazed connections are considered here in particular. Formation of a specific brazed connection is particularly important to ensure a permanent connection of the honeycomb structure to the shell. This is because, in the exhaust system of a mobile or stationar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/28B23K1/00
CPCY10T29/49345Y10T428/1234Y10T428/12389B23K1/0014B23K2201/02B23K2201/006Y10T428/12292F01N3/281F01N2450/22Y10T428/24149F01N3/2842B23K2101/006B23K2101/02
Inventor L·维尔斯A·肖尔茨
Owner EMITEC EMISSIONSTECHNIK
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