Abstract: A reactive hot melt composition, having a softening point of at least 50° C., and being curable on heating to a temperature of 150° C. The composition comprises a blend of (a) a macrocyclic oligomer having a softening point of at least 50° C., containing at least one ring having eight or more atoms, and being able to undergo decyclization at a temperature of 150° C. or more, to produce a polymerizable species, wherein each cyclic oligomer molecule provides two or more structural repeat units of the same or different formula for the resulting polymer, and (b) a thermoplastic resin, its use as an adhesive and methods of its application.

Abstract: The present invention relates to a method for operating a piston engine, more preferably of a motor vehicle, with a fresh air system for feeding fresh air to cylinders of the piston engine and with an exhaust system for discharging exhaust gas from the cylinders, wherein during a gas exchange by means of a positive pressure wave on the fresh air side the charging of the respective cylinder with fresh air and/or by means of a negative pressure wave on the exhaust gas side the discharging of exhaust gas from the respective cylinder is supported. An increased variability is obtained if the respective pressure wave is generated by means of at least one electroacoustic converter.

Abstract: The present invention to an active muffler for an exhaust gas system of an internal combustion engine, in particular in a motor vehicle, includes a multi-shell housing having a pot-shaped top shell and a pot-shaped bottom shell, a funnel-shaped sound conducting body, which is inserted into the bottom shell and has a connection passing through the bottom shell and out of the housing, a loudspeaker, which is situated in the top shell and is attached to a flange section of the sound conducting body at a distance from the connection, such that a free inside cross section of the sound conducting body surrounded by the flange section is closed with an airtight seal, and a bypass through which an interior space of the top shell is connected to an interior space of the bottom shell so they communicate.

Abstract: An exhaust system (3) for an internal combustion engine (2), especially of a motor vehicle (1), is provided with at least one exhaust pipe (10), which carries an exhaust gas flow (11) away from the internal combustion engine (2) during the operation of the internal combustion engine (2). An active exhaust muffler (12) is provided with a housing (13) that is acoustically connected to the exhaust pipe (10) via a connection pipe (15). Damage to the exhaust muffler (12) is avoided by actively and/or passively cooling the connection pipe (15).

Abstract: The invention relates to a silencer for an airborne sound conducting pipe system, including a housing enclosing an interior space, an inlet pipe having an outlet within the interior space, a bypass pipe branching off from inlet pipe within the housing and having an outlet, a control element actuated by the gas flow and arranged downstream of bypass pipe on or in the inlet pipe, and at least one outlet pipe having an inlet within the interior space. Furthermore, the interior space is acoustically unseparated in such a manner that the volume of the interior space loaded with the airborne sound is equal with opened and with closed control element.

Abstract: A component such as a vehicle exterior part having a transparent area without creating gaps is produced by introducing a hole into a film for the transparent area, inserting the film into a component mold, and then back-molding the same with a transparent plastic material in the mold such that the hole is filled with the transparent plastic material.

Abstract: The invention relates to a method for applying electrical conductor patterns (1) to or into a target component (10) of plastic, it being provided according to the invention that a carrier medium on or in which the conductor patterns (1) are permanently arrange d is placed in a mould part (3, 8) and the mould part (3, 8) is filled with a mouldable polymer material, the target component (9) with the conductor patterns (1) being removed from the mould part (3, 8) after the moulding of the polymer material.

Abstract: The invention relates to a panel part of the outer panel or inner panel of a motor vehicle. Said panel part comprises a base body (10) at least partially consisting of a transparent plastic material (12) carrying at least one solar module (16), the plastic material entirely surrounding the solar module (16) in a form-fitting manner, at least on the sun-facing side or the outer side of the panel part. The sun-facing side or outer side of the panel part is covered, at least in sections, by an essentially opaque and/or coloured covering layer (14) comprising a recess (18) associated with the solar module, in the arrangement region of the solar module (16).

Abstract: An exhaust system (1) is provided for an internal combustion engine (4), especially in a motor vehicle, with two separate exhaust gas lines (2, 3) with a first sound transmission feature (7), which couples the two exhaust gas lines (2, 3) with one another, and with a control (9) for activating and deactivating the first sound transmission connection (7) as a function of at least one operating parameter of the internal combustion engine (4).

Abstract: A conveying member, especially a rotor or stator, for conveying a flowable, preferably gaseous medium, comprises a plurality of blades (S1-S7) arranged following each other with a circumferential distance in a circumferential direction (U) around a central axis (A). Either a first circumferential distance (a) or a second circumferential distance (b) differing from the first circumferential distance (a) is provided between a blade and a respective blade following it in the circumferential direction (U) in a group of blades directly following each other in a circumferential direction (U), which the group comprises at least some of the blades (S1-S7). The first circumferential distance (a) is provided between at least two blades (S1-S7) located directly adjacent to one another, and the second circumferential distance is provided between at least two blades (S1-S7) located directly adjacent to one another.

Abstract: The invention relates to a method for applying electrical conductor patterns (1) to a target component (9) of plastic, it being provided according to the invention that a transfer medium on which the conductor patterns (1) are detachably arranged is placed in a mould part (3, 4) and the mould part (3, 4) is filled with a polymer material, the finished target component (9) being removed from the mould part (3, 4) after the filling.

Abstract: The present invention relates to an active muffler for an exhaust gas system of an internal combustion engine, in particular in a motor vehicle, having at least one antinoise generator for applying antinoise to the exhaust gas, whereby the antinoise generator has a diaphragm drive with which it is coupled via at least one coupling element in a thermally conducting and noise-reducing manner to an outside wall of the muffler, which is in contact with the environment.

Abstract: Recently, at least some parts of exterior components of vehicles have been made of plastic as well by back-molding lacquer films with plastic. A large number of such exterior components require transparent areas which are produced separately and are inserted into die-cut zones of the component. Said method requires a lot of effort while joints are difficult to prevent. The aim of the invention therefore is to create a component that can be produced in a simpler manner and without creating gaps as well as an adequate method for the production thereof. Said aim is achieved by introducing a hole into the film for the transparent area, inserting said film into the component mold, and then back-molding the same with a transparent plastic material in the mold such that the hole is filled with the transparent plastic material.

Abstract: The present invention relates to an active muffler for an exhaust gas system of an internal combustion engine, in particular in a motor vehicle, having at least one antinoise generator for applying antinoise to the exhaust gas, whereby the antinoise generator has a diaphragm drive with which it is coupled via at least one coupling element in a thermally conducting and noise-reducing manner to an outside wall of the muffler, which is in contact with the environment.

Abstract: An active exhaust muffler for an exhaust system of an internal combustion engine, having a housing through which a pipe system passes, the pipe system designed to be permeable for airborne sound in a first space, having an antisound generator which is arranged in a second space and antisound acting upon a third space through a wall opening during operation, the wall opening being provided in a partition that separates the second space from the third space, whereby airborne sound is transmitted from the first space to the third space through a sound outlet. To increase the lifetime of the antisound generator and thus the exhaust muffler, a labyrinth is provided in the third space, blocking a direct path between the sound outlet and the wall opening, and providing at least one indirect bypass for the propagation of airborne sound between the sound outlet and the wall opening.

Abstract: An active muffler (1) for an exhaust system (2) of an internal combustion engine has a first space (3) and a second space (4) that is separated from the former via a partition (5). The partition (5) has a wall opening (6) into which is inserted an electronic sound absorber (7) having a chassis (8) and a diaphragm (9). During operation, the electronic sound absorber directs anti-sound toward the first space (3) and thereby reduces the sound emission generated by the exhaust system (2). The chassis (8) of the electronic sound absorber (7) and the partition (5) are made in one piece.

Abstract: The present invention relates to a muffler for an exhaust system of an internal combustion engine having an exhaust gas-carrying first pipe which is connectable to a first exhaust line of the exhaust system or forms an integral component of the first exhaust line, and an exhaust gas-carrying second pipe which is connectable to a second exhaust line of the exhaust system or forms an integral component of the second exhaust line. To design the muffler to be as compact as possible, a housing of the muffler includes a damper space situated between the pipes and has two longitudinal side walls each formed by a wall section of one of the pipes that is permeable for airborne sound.

Abstract: The invention relates to a motor vehicle body, the support structure (10) of which is composed of large-size partial modules (12, 34, 50, 66), a basic module (12) comprising lateral longitudinal members (15) and a body floor (14) and reaching laterally as far as front wall columns (20), and, when the support structure (10) is assembled, the basic module (12) being connected to a front end module (34) which belongs to the front crumple zone of the motor vehicle and is supported in a crash stable manner on the basic module (12). In order to provide a motor vehicle body, in which the front end module (34) even without a roof construction is fixed in a sufficiently stable manner on the basic module (12), a front end region (36) of the body floor (14) belongs to the front end module (34) and extends rearward over a considerable length region of the basic module (12) between lateral longitudinal member sections (16).

Abstract: An active exhaust muffler for an exhaust system of an internal combustion engine, having a housing through which a pipe system passes, the pipe system designed to be permeable for airborne sound in a first space, having an antisound generator which is arranged in a second space and antisound acting upon a third space through a wall opening during operation, the wall opening being provided in a partition that separates the second space from the third space, whereby airborne sound is transmitted from the first space to the third space through a sound outlet. To increase the lifetime of the antisound generator and thus the exhaust muffler, a labyrinth is provided in the third space, blocking a direct path between the sound outlet and the wall opening, and providing at least one indirect bypass for the propagation of airborne sound between the sound outlet and the wall opening.

Abstract: The invention relates to a controlled acoustic wave guide configured as an elongated hollow chamber (1) which via an opening (2) in its first face end (3) is connected to a sound-conducting channel (4). The longitudinal resonances of the hollow chamber (1) can be adjusted to a sound spectrum to be dampened. To this end diaphragm vibrations are detected by means of a microphone (10) which is positioned directly in front of the diaphragm (8) of at least one loud-speaker (9) at the second face-end (6) of the hollow chamber (1). The microphone signal is then inverted using an amplifier (11) and fed back to the loud-speaker (9) after amplification in accordance with a sensor (12) signal characterizing the sound spectrum in the channel (4).