Honeycombed body with a connection free area

Abstract

A honeycomb body includes at least a housing and a honeycomb structure having a plurality of channels. The honeycomb structure is formed of at least one at least partially structured metallic layer that forms connecting points fixing the honeycomb structure. At most 20% of inner contact points in a cross section of the honeycomb structure form a connection point, and the connection points are disposed at a distance from each other in such a way that respective connection-free regions of the same size surround each of the connection points. An exhaust-gas purification unit and a motor vehicle are also provided.

Description

technical field [0001] The invention relates to a honeycomb body having at least one shell and a honeycomb structure with a plurality of channels, wherein the honeycomb structure is formed by an at least partially structured metal layer forming a fixed Connection points of the honeycomb structure. In this case, in a cross-section of the honeycomb structure, at most 20% of the internal contact points form connection points. Such honeycomb bodies, which are distinguished by their high internal flexibility, are used in particular as catalyst carriers in the exhaust system of vehicle engines. Background technique [0002] Honeycomb bodies in the exhaust gas purification of engines, such as compression ignition engines or spark ignition engines, have the advantage of a particularly large surface area, which ensures that the exhaust gas flowing through the honeycomb body is in very close contact with the channel walls. The surfaces substantially formed by the channel walls are g...

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Problems solved by technology

[0006]Although various proposals have been given for designing such brazing patterns, none of them has the durability to withstand all current conditions

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