Catalyst carrier body having a sleeve with microstructures allowing expansions

摘要

A catalyst carrier body includes a honeycomb body with at least partly structured sheet metal layers having exhaust gas channels. An inner surface of a jacket tube at least partially encloses, and is connected in at least one axial subregion to, the honeycomb body. A sleeve has a length axially less than the honeycomb body and an outer surface against part of the inner surface of the jacket tube. The sleeve is on an outer region of the honeycomb body near an end surface and has an inner surface connected or brazed to radially outward end regions of the sheet metal layers at the end surface for preventing flapping. The sleeve has at least one microstructure for reducing a contact area between sleeve and jacket tube. Such a catalyst carrier body is mechanically and thermally resistant even to high alternating loads and suitable in particular for placement near the engine.