Abstract: A superchargeable internal combustion engine with cylinder cut-off has a first cylinder group which operates over the entire operating range of the internal combustion engine. A second cylinder group is cut off or connected up as a function of demand. The engine's response dynamics when the second cylinder group is connected up by providing an exhaust-gas turbocharger which is used exclusively for supercharging the first cylinder group. A mechanical supercharger is provided which is used exclusively for supercharging the second cylinder group.

Abstract: A tube/fin block for a heat exchanger has several tubes through which a heat transfer fluid can flow arranged side-by-side along a transverse direction of the block. Corrugated-fin complexes are inserted between respective adjacent tubes and are connected with the adjacent tubes. At least one of the corrugated fin-complexes is a double corrugated-fin complex with two corrugated-fin units arranged side-by-side in the transverse direction of the block. A particular manufacturing process for the tube/fin block is utilized. A heat insulation device is provided between the two corrugated fin units. A non-solderable spacer plate can be inserted between the two corrugated fin units and pulled out after the tube/fin block is soldered together so that a heat-insulating gap is formed. A plastic strip can be inserted into the heat-insulating gap as required. The block is appropriate for use, for example, in condensers and evaporators of motor vehicle air conditioners.

Abstract: A fluid filter having a substantially pot-shaped housing 10 in which is disposed a filter insert 11 including a pleated filter element 18 and end plates 19 and 20. The housing has a mounting flange 12 and a cover 13. The cover is connected to the mounting flange by a threaded connection or a bayonet connection. The fluid filter is attached by the mounting flange 12 to a supporting structure by at least one catch or a hinge in the form of a holding flange 29 and a projection 30.