Abstract: A joining device for producing an exhaust gas system for an internal combustion engine comprises a device base, a frame, and at least two joining units that can be operated simultaneously are fastened to the frame. The frame extends essentially vertically starting from the device base. In a method for producing the exhaust gas system, at least one joining unit of a joining device is oriented to a geometry of the exhaust gas system that is to be produced, at least three components or assemblies of the exhaust gas system are positioned in the joining device, and the components or assemblies are simultaneously connected.

Abstract: A valve actuating device, in particular for an exhaust system, comprises a disk assembly, an actuating arm, and a valve actuator wherein the disk assembly is arranged between the actuating arm and the valve actuator. The disk assembly, at least in part, thermally decouples the actuating arm from the valve actuator and includes at least two identically constructed disks with axial protrusions, which in an axial direction are directly arranged one behind the other and contact each other at the protrusions.

Abstract: An electrically heated catalyst has a catalyst body and a housing at least circumferentially surrounding the catalyst body. An electrical contacting assembly is arranged on a shell surface of the catalyst body, the electrical contacting assembly comprising a surface electrode arranged directly on the catalyst body and a contacting element connected to the surface electrode. The contacting element is rigid and has a screw thread.

Abstract: A method of manufacturing a cylindrical housing of an exhaust-gas treatment unit for vehicles includes providing a flat sheet metal part having at least one embossing, and round bending the sheet-metal part in a round bending tool by displacing the sheet metal part between rolls such that the sheet metal part obtains a cylindrical shape having a longitudinal direction parallel to roll axes of the rolls. At least one elastic roll is used such that the embossing of the sheet metal part is maintained during round bending. The longitudinal edges of the cylindrical sheet metal part are then connected to form a tube. A method of manufacturing an exhaust-gas treatment unit is furthermore shown.

Abstract: An exhaust system component for an exhaust system of an internal combustion engine of a motor vehicle comprises a substrate which is held in a substantially cylindrical housing. The cylindrical housing has a housing jacket which comprises a metal sheet bent about a cylinder axis. The ends of the metal sheet oriented in the circumferential direction relative to the cylinder axis form a joint connected with a weld seam. The weld seam is spaced apart from an inner surface of the housing jacket and the ends each have a bevel at least in sections.

Abstract: An exhaust pipe assembly comprises an exhaust pipe extending along a pipe axis and a fastening panel that is mounted to the exhaust pipe. The cross-section of the fastening panel is configured in a curved manner, and two contact surfaces of the fastening panel, which are spaced apart in the circumferential direction, are soldered to the exhaust pipe. A support connected with the fastening panel is arranged between the two contact surfaces of the fastening panel. The fastening panel can be fastened to the exhaust pipe by the following steps: an exhaust pipe and a sheet-metal tab are provided; a soldering material is then captively fixed to the sheet-metal tab; and the sheet-metal tab is then arranged on the exhaust pipe such that the soldering material contacts the exhaust pipe to finally solder the sheet-metal tab to the exhaust pipe.

Abstract: A sound generating device is provided on a vehicle to reduce or generate engine sound, and is used in particular for an exhaust system of a combustion engine of the vehicle. The sound generating device has a housing into which a loudspeaker is positioned to divide an inner space of the housing into two sub-spaces separated in a gas-tight manner. A seal rim provides the gas-tight sealing of the loudspeaker towards the housing. An abutment rim positions the loudspeaker in the inner space of the housing. The abutment rim and the seal rim are spaced apart from each other in a direction of a central axis of the loudspeaker. There is also described an exhaust system of a combustion engine of a vehicle with a sound generating device.

Abstract: A cylinder holder for a hydroforming device has a substantially cuboid cylinder holder body with a hydraulic cylinder seat to which a hydraulic cylinder can be fixed. The hydraulic cylinder is configured to supply a hydroforming fluid to a workpiece to be shaped. The cylinder holder further includes a base plate to which the cylinder holder body is fixed at a predetermined angle with an anti-rotation lock unit.

Abstract: An exhaust gas system includes a first exhaust component and a second exhaust component that are spaced apart from each other by a solder gap that can be has great as 1.20 mm. A high temperature solder material is provided near the solder gap and is heated by an inductor to form an induction solder joint between the first and second exhaust components.

Abstract: A method of regenerating an exhaust gas purification filter, in particular for internal combustion engines, uses a vaporized liquid that is to be introduced into the exhaust gas flow. A surface temperature of a heating element in a vaporizer chamber is limited to a maximum of 700 to 750° C.

Abstract: A sound generating device for a vehicle exhaust system has a housing, a sound generator located in the housing, a housing wall that comprises an opening for the sound generator, and a sound channel that extends in the housing. The sound generator is mounted to a shoulder section of the opening such that the opening is closed by the sound generator and a front side and a rear side of the sound generator are assigned to different sides of the opening. The sound channel acoustically connects the rear side of the sound generator with the front side of the sound generator. The opening and the sound generator comprise a central axis and the sound channel runs at least partially around the central axis.

Abstract: A component of an exhaust system for a combustion engine has a wall in which at least one opening is provided, and a perforated cover which is associated with the opening. A support is provided by which the perforated cover is mounted to the wall of the component. Further, a clearance is provided between the support and the cover such that the cover can shift parallel to the wall of the component.

Abstract: A thermoelectric generator unit, in particular for coupling to an exhaust gas pipe of an internal combustion engine, comprises at least one inner tube (16) having gas flowing therein and whose outer circumference comprises at least one flat portion (24). An oval outer housing (12) completely surrounds the inner tube (16) in circumferential direction. A plurality of thermoelectric modules (14) are arranged on the flat portions (24) of the inner tube (16). At least one cooling element (18) is provided which comprises a flat side on which the thermoelectric modules (14) are arranged. The assembly unit made up of inner tube (16), thermoelectric modules (14) and cooling element (18) is surrounded by an elastic compensation element (20) which rests on the inner side of the outer housing (12) and is retained in the outer housing (12) by means of clamping.

Abstract: A method of generating a drive signal for a loudspeaker in an exhaust system of an engine of a vehicle or inside or outside a passenger cell includes providing a predetermined source signal for a desired additional sound in a time domain comprising a plurality of signal components of different frequencies; analyzing the source signal based on a phase of the source signal and/or a phase of at least one oscillation in the source signal; identifying a phase of engine noise and/or a phase of at least one oscillation existing in engine noise; shifting the phases of the source signal and/or the oscillation existing in the source signal based on phases identified in engine noise and/or in oscillation existing in engine noise, the relationship of phases of individual oscillations of the source signal among each other being preserved; and generating the drive signal based on the phase-shifted source signal.

Abstract: A device for exhaust gas heat utilization in internal combustion engines of motor vehicles has an outer housing through which exhaust gas can flow and at least one thermoelectric generator module received in the outer housing. The at least one thermoelectric generator module is fastened onto a wavelike carrier wall. The invention further relates to an exhaust gas module having such a device, and to a method of manufacturing this device.

Abstract: In a method of influencing the exhaust noise of a motor vehicle, a control unit generates noise package signals, the control unit transmits the noise package signals individually or so as to superimpose a basic signal to a loudspeaker associated with an exhaust branch of the motor vehicle, and the loudspeaker converts the individual noise package signals or the basic signal superimposed with the noise package signals into sound waves, with individual noise package signals being emitted by the loudspeaker as time-limited sound wave packages, so-called noise packages. Furthermore, an exhaust system is shown.

Abstract: An exhaust pipe assembly comprises an exhaust pipe extending along a pipe axis and a fastening panel that is mounted to the exhaust pipe. The cross-section of the fastening panel is configured in a curved manner, and two contact surfaces of the fastening panel, which are spaced apart in the circumferential direction, are soldered to the exhaust pipe. A support connected with the fastening panel is arranged between the two contact surfaces of the fastening panel. The fastening panel can be fastened to the exhaust pipe by the following steps: an exhaust pipe and a sheet-metal tab are provided; a soldering material is then captively fixed to the sheet-metal tab; and the sheet-metal tab is then arranged on the exhaust pipe such that the soldering material contacts the exhaust pipe to finally solder the sheet-metal tab to the exhaust pipe.

Abstract: An exhaust system is manufactured in the following manner. Initially, a plurality of pipe sections are put into each other with a clearance fit, so that connecting points are formed, at which two pipe sections overlap each other. The pipe sections then are calibrated at the connecting points, so that a narrow gap is obtained. Subsequently, the connecting points are soldered. The exhaust system thus includes a plurality of pipe sections which are put into each other and soldered to each other. Outer pipe sections of the plurality of pipe sections are calibrated.

Abstract: A method of manufacturing an exhaust gas carrying device, in particular an exhaust gas purification device, and a tool provided therefor include segment-like jaws that are used to deforma an outer housing. The jaws have indentations or projections adjacent to each other, and which are complementary to form a continuously surrounding indentation/projection. The reshaped outer housing is provided with one or more surrounding projections or indentations by the deformation.

Abstract: An assembly (10) for introducing a reducing agent into the exhaust pipe (12) of an exhaust system of an internal combustion engine, in particular of a motor vehicle, has a feed connector (14) which opens into the exhaust pipe (12) and includes a wall (16), a feed device (20) for reducing agents which opens into the feed connector (14), and a device (22) for generating a gas flow (G) which is additional to the reducing agent flow (R) and lines the wall (16) of the feed 10 connector (14). Furthermore, there is described a method of introducing a reducing agent into the exhaust pipe (12) of an exhaust system of an internal combustion engine, in particular of a motor vehicle.