Abstract: In the case of a gas-dynamic pressure-wave supercharger for the supercharging of an internal combustion engine, an exhaust bypass in the gas housing (2), with a medium-controlled gate, connects the high-pressure gas inflow duct (4) to the low-pressure gas outflow duct (6). The exhaust gas blown off is introduced via a waste gate ejector (33), which is located in the region of the closing edge (30) in the low-pressure gas outflow duct (6), into the latter. Consequently, the energy level of the low-energy scavenging air can be increased, which improves the compression efficiency of the pressure-wave supercharger.

Abstract: Process for applying a catalyst layer (4) composed of noble metals and/or noble-metal compounds to a ceramic carrier (1), in which process at least one ceramic intermediate layer (2) based on a glaze is applied, subjected to a heat treatment and cooled down. The catalyst layer (4) is in turn deposited as a chemical, electrochemical or physical deposit. Variants with .gamma.-Al.sub.2 O.sub.3 intermediate layer or with SiO.sub.2 intermediate layer or with Si intermediate layer.