Abstract: A filament cutterhead for a brushcutter is able to be driven in a rotatable manner during operation in a rotational direction about a rotational axis. The filament cutterhead has a base body on which at least one cutting filament is retained and which has a lower face facing the ground during operation. The cutting filament extends from an outer face of the base body through an opening as far as an inner region of the base body which is open toward the lower face of the base body. In order to achieve a low degree of soiling of the filament cutterhead during operation, a shield element is provided in the inner region and the leading portion of the cutting filament in the inner region is arranged in the slipstream of the shield element relative to the rotational direction.

Abstract: A filament cutterhead for a brushcutter is able to be driven in a rotatable manner during operation in a rotational direction about a rotational axis. The filament cutterhead has a base body on which at least one cutting filament is retained and which has a lower face facing the ground during operation. The cutting filament extends from an outer face of the base body through an opening as far as an inner region of the base body which is open toward the lower face of the base body. In order to achieve a low degree of soiling of the filament cutterhead during operation, a shield element is provided in the inner region and the leading portion of the cutting filament in the inner region is arranged in the slipstream of the shield element relative to the rotational direction.

Abstract: Described is an elastic diaphragm for a pressure-measuring device for ascertaining a pressure in a combustion chamber of an internal combustion engine, especially a self-ignitable internal combustion engine, the diaphragm being accommodated in a housing of the pressure-measuring device in order to separate a pressure chamber from a cavity and in order to seal the housing from the pressure to be measured. The diaphragm has a pressure-application region. Furthermore, the diaphragm is developed in the shape of a ring and in cross-section has a U-shape that is open toward the cavity; the region of the diaphragm on which the pressure is acting is geometrically made up of two interconnected quarter circles, so that the pressurized region has a structure that is self-supporting with respect to the arising combustion pressure loads.

Abstract: A method for regenerating an exhaust aftertreatment system, in particular a particulate filter of an internal combustion engine, situated in a vehicle, having regeneration cycles controlled by a control device. An optimized regeneration of the exhaust aftertreatment system is achieved by supplying information relating to the travel route to the control device and controlling the regeneration cycles, taking the information into consideration.

Abstract: A filter element for a soot particle filter includes a blank which is designed, during extrusion, specifically not to be round, so that, in response to subsequent heat treatment, the different shrinkage measurements in the radial direction become equalized, and a filter element that has a circular cross section is produced.

Abstract: Devices and methods for the production of ammonia as a reducing agent for the selective catalytic reduction (SCR) of nitrogen oxides in the exhaust gas of a combustion source, especially of an internal combustion engine. The ammonia is admixed with the exhaust gas in the direction of flow in front of a SCR-catalytic converter. In so doing, nitrogen oxide is produced in a nitrogen oxide production unit separated from the combustion source and its exhaust gas duct and is stored in at least one storage catalytic converter or a nitrogen oxide storage and a subsequently connected catalytic converter. Furthermore, hydrogen and/or a hydrogen-carbon monoxide-mixture is produced in a hydrogen production unit separated from the combustion source and its exhaust gas duct and delivered to a storage catalytic converter. Hydrogen and the stored nitrogen oxide are converted catalytically to ammonia in the storage catalytic converter or in the catalytic converter.

Abstract: The invention concerns a device to produce ammonia as a reducing agent for the selective catalytic reduction (SCR) of nitrogen oxides in the exhaust gas of a combustion source, especially of an internal combustion engine, whereby the ammonia is admixed with the exhaust gas in the direction of flow in front of a SCR-catalytic converter. In so doing, provision is made for a nitrogen oxide production unit separated from the combustion source and its exhaust gas duct and a hydrogen production unit separated from the combustion source and its exhaust gas duct; and nitrogen oxide of the nitrogen oxide production unit and the hydrogen of the hydrogen production unit are delivered at least to a storage catalytic converter or a nitrogen oxide storage and a subsequently connected catalytic converter for the storage of the nitrogen oxide and for the formation of ammonia.

Abstract: A method for regenerating an exhaust aftertreatment system, in particular a particulate filter of an internal combustion engine, situated in a vehicle, having regeneration cycles controlled by a control device. An optimized regeneration of the exhaust aftertreatment system is achieved by supplying information relating to the travel route to the control device and controlling the regeneration cycles, taking the information into consideration.

Abstract: An exhaust cleaning system for motor vehicles, especially a diesel exhaust cleaning system for medium to heavy utility vehicles. The exhaust cleaning system has an exhaust muffler (1), a catalytic converter (2) and an exhaust particle filter element (3). The exhaust muffler (1), the catalytic converter (2) with a U-shaped tubular urea injection element (4) arranged upstream and an exhaust particle filter element (3) are integrated in a common housing and designed as a structural, functional unit.

Abstract: An exhaust cleaning system for motor vehicles, especially a diesel exhaust cleaning system for medium to heavy utility vehicles. The exhaust cleaning system has an exhaust muffler (1), a catalytic converter (2) and an exhaust particle filter element (3). The exhaust muffler (1), the catalytic converter (2) with a U-shaped tubular urea injection element (4) arranged upstream and an exhaust particle filter element (3) are integrated in a common housing and designed as a structural, functional unit.

Abstract: An exhaust elbow (1) is provided with a single exhaust outlet (2) with an outlet mounting flange (3) and at least two exhaust inlets (4, 5, 6) with an inlet mounting flange (7) for fastening on the engine block of a motor vehicle. The exhaust guiding of the exhaust elbow (1) between the inlet mounting flange (7) and the outlet mounting flange (3) is formed by a single-walled sheet metal hood (8) forming a collection line. The sheet metal hood (8) surrounds all exhaust inlets (4, 5, 6) together, without individual pipes being formed. Such a simple sheet metal elbow can be manufactured at a low cost and with low weight and nevertheless has sufficient ability to function, is dimensionally stable and can be used in a versatile manner.

Abstract: An exhaust cleaning system for motor vehicles, especially a diesel exhaust cleaning system for medium to heavy utility vehicles. The exhaust cleaning system has an exhaust muffler (1), a catalytic converter (2) and an exhaust particle filter element (3). The exhaust muffler (1), the catalytic converter (2) with a U-shaped tubular urea injection element (4) arranged upstream and an exhaust particle filter element (3) are integrated in a common housing and designed as a structural, functional unit.

Abstract: An exhaust elbow (1) is provided with a single exhaust outlet (2) with an outlet mounting flange (3) and at least two exhaust inlets (4, 5, 6) with an inlet mounting flange (7) for fastening on the engine block of a motor vehicle. The exhaust guiding of the exhaust elbow (1) between the inlet mounting flange (7) and the outlet mounting flange (3) is formed by a single-walled sheet metal hood (8) forming a collection line. The sheet metal hood (8) surrounds all exhaust inlets (4, 5, 6) together, without individual pipes being formed. Such a simple sheet metal elbow can be manufactured at a low cost and with low weight and nevertheless has sufficient ability to function, is dimensionally stable and can be used in a versatile manner.