| 摘要 |
Double casing system for catalysts, in particular for the catalysts of passenger vehicles with spark-ignition engines and high operational capacity. Two metallic honeycomb elements (1, 2) with their internal steering column jackets (3, 4) are preferably arranged within an external steering column jacket (8), whereby only one of the end areas (12, 13) of each internal steering column jacket (3, 4) is mounted (10, 11) on the external jacket (8), their internal parts being axially mobile and sliding into each other, thus forming a sliding fit (5). Because of its gap space (9), the double casing system acts as a thermal insulation. Radial thermal tensions between the honeycomb elements (1, 2) and the internal steering column jackets (3, 4) are thereby reduced while axial thermal dilatation because of the sliding fit (5) does not cause any tensions. |
