Method of producing exhaust-gas carrying devices, in particular exhaust-gas cleaning devices

Abstract

In a method for producing exhaust-gas-conducting devices, in particular exhaust-gas-cleaning devices, the outer geometry of each substrate (10) is determined and, as a function of this outer geometry, an outer housing (14) with coordinated geometry is manufactured, in which the substrate (10) is accommodated and clamped together with a compensating element (12).

Description

technical field [0001] The invention relates to a method of making an exhaust gas carrying device, in particular an exhaust gas cleaning device, all having a housing with an insert clamped therein, the insert comprising a substrate through which the exhaust gas flows and an elastic compensating element surrounding the substrate. Background technique [0002] Exhaust gas carrying devices which represent the gist of the invention are especially exhaust gas cleaning devices such as catalytic converters or diesel particle filters or combinations thereof. Such devices consist of inserts that are very sensitive to radial pressure and to date have mainly been ceramic substrates that allow the gas to flow axially through it and are wound around elastic compensating elements (commonly called for the liner). These inserts are clamped in the housing in the axial and lateral direction mainly by radial clamping, while additional supports are also possible, for example by wire mesh ring...

AI Technical Summary

Problems solved by technology

However, in practice it is almost impossible to compensate for large variations in the liner clamping force even by this means

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