Exhaust gas treatment device

Abstract

The device has a housing for surrounding an inner area of the device, and a passage tube (5) permeating the inner area and firmly connected with the housing at two fastening points. The passage tube has an expansion compensation section (8) between the fastening points, where a wall of the passage tube has slots (12) and wave-shaped strips (11). The strips are projected opposite to adjacent wall sections (13, 14) of the passage tube. The strips are arranged adjacent to each other in a circumferential direction with respect to a longitudinal axis (9).

Description

technical field [0001] The invention relates to an exhaust gas treatment device for the exhaust system of an internal combustion engine, in particular of a road vehicle. Background technique [0002] The exhaust gas treatment device can be configured, for example, as a catalytic converter or a particle filter or a silencer or comprise any desired combination of these devices. In any case, such an exhaust-gas treatment device usually has a housing which encloses at least one interior space. For certain applications, in particular in the case of silencers, it is necessary to pass at least one through-pipe through the interior space without interruption, wherein the through-pipe is then held in two positions in the housing spaced apart from each other. For example, the through-pipe penetrates the two bases of the spaced-apart housing, which fix the through-pipe transversely. [0003] In order to reduce or avoid the stress between the through pipe and the housing due to the ef...

AI Technical Summary

Problems solved by technology

This results in higher loads on the welded points between the respective pipe and housing

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