Abstract: An internal combustion engine element may be an air filter or a suction system of an internal-combustion engine. Both have a housing with walls which bound an interior of the housing, through which interior intake air flows during the operation of the internal-combustion engine. For achieving advantageous psycho-acoustic effects, the walls are provided with relatively thin-walled surfaces for achieving defined frequencies.

Abstract: The drive assembly is formed by an internal-combustion engine which is installed in a passenger car. By means of bearings, supports or the like, the internal-combustion engine is held in position in an assembly space. By means of a wall of a vehicle body, the assembly space is separated from a vehicle occupant compartment. For achieving favorable psycho-acoustic effects, a sound support is provided between the internal-combustion engine and the wall of the vehicle body, by which sound support the engine-mechanical structure-borne sound is transmitted into the vehicle body, specifically for a targeted perception by occupants in the vehicle occupant compartment.

Abstract: A draft deflector for a sliding roof is disclosed for a removable roof section or the like. The deflector exhibits an airfoil profile which extends in the transverse direction of the vehicle, is arranged adjacent to a front edge of the roof opening and can be moved from a sunk inoperative position to a swivelled-up operative position and vice versa. In the operative position, the airfoil profile extends at a negative setting angle and projects beyond an imaginary roof contour at least in sections in the upward direction. In order to reliably avoid, during the driving operation, when the roof is open, the occurrence of annoying low-frequency vibrations in the vehicle interior (sliding roof rumbling) and to essentially maintain the aerodynamic drag of the vehicle, it is provided that the airfoil profile, in the operative position, is arranged such that it is ensured that the air current occurring in the driving operation flows around the airfoil profile on both sides.