Abstract: A method for operating an exhaust gas treatment device having at least one heater and at least one supply device for a reducing agent includes initially carrying out a test in order to determine if the reducing agent is to be supplied, and subsequently implementing different heating strategies in each case. In the event that the reducing agent is to be supplied, the exhaust gas treatment device is heated with the heater until a first threshold temperature is reached, if a first temperature lies below the first threshold temperature. In the case when no reducing agent is to be fed, the exhaust gas treatment device is heated with the heater until a second threshold temperature is reached, if a second temperature lies below the second threshold temperature. A motor vehicle having the device is also provided.

Abstract: A method for operating a metering apparatus for reducing agent includes providing the metering apparatus with at least one movable pump element movable between upper and lower reversal points to convey reducing agent into an exhaust-gas treatment component, and at least one position transmitter for determining a pass of the movable pump element. In the method, a first detection of a position of the movable pump element is provided by the position encoder. Subsequently, the movable pump element is moved and reducing agent is metered into the exhaust-gas treatment component. Thereupon, a second detection of a position of the movable pump element is provided by the position encoder, and subsequently a first quantity of reducing agent which is metered between the first and second detections is determined. A metering apparatus and a motor vehicle having a metering apparatus are also provided.

Abstract: A delivery unit for a liquid additive includes a first pump with a first suction port and a first pressure port, a second pump with a second suction port and a second pressure port, and a feed device. The feed device is connected to the first pressure port through a first line system and the first suction port is connected to a tank for the liquid additive through a second line system. The second pressure port is connected to the tank through a third line system and the second line system and the third line system are separated from one another. A method for operating a delivery unit and a motor vehicle having a delivery unit are also provided.

Abstract: A mounting for an injector includes at least one main body and a cap jointly or commonly forming a receptacle for the injector. The main body is formed of metal sheets which are connected to each other and together form at least one annular chamber which extends around the receptacle. In particular, a mounting for an injector is provided, which has a simple technical construction and can be cooled (optionally in a controlled manner). Moreover, the mounting has a particularly lightweight construction and is adapted to operation with considerable temperature differences. An injection device integrated in a mounting is also provided.

Abstract: A device for conveying a liquid reducing agent from a tank to a supply element includes a connecting element for connecting a reducing agent line, a system heating unit and a heat-conducting structure configured to transport heat from the system heating unit to the connecting element. A motor vehicle having the device is also provided.

Abstract: An exhaust gas treatment unit includes a substantially cylindrical exhaust gas treatment body having a main axis and, on at least one opening side of the exhaust gas treatment unit, at least one of the following connecting devices or connectors: an offset compression zone or a molded structure for form-locking engagement. An internal combustion engine includes at least one exhaust gas treatment unit and at least one exhaust gas conducting line. The at least one exhaust gas treatment unit is completely introduced in the at least one exhaust gas conducting line. A motor vehicle having at least one exhaust-gas treatment unit is also provided.

Abstract: A thermoelectric module includes an inner circumferential surface and an outer circumferential surface each being assigned to a respective hot side or cold side and forming an intermediate space therebetween, a geometric axis and at least one sealing element. The sealing element at least partially forms the inner circumferential surface or is separated from the hot side or cold side disposed there only by an electric insulation layer. The sealing element seals the intermediate space at least with respect to the cold side and has at least one electric conductor connecting at least one thermoelectric element disposed in the thermoelectric module to at least one other electric conductor disposed outside the thermoelectric module. A vehicle having the thermoelectric module is also provided.

Abstract: An annular semiconductor element for producing a thermoelectric module includes at least one groove extending in a radial direction from an internal circumferential face to an external circumferential face. An annular insulation material insulates n-doped and p-doped semiconductor elements and is accordingly disposed on a lateral face of the semiconductor elements. The insulation material has a slit which extends in the radial direction and divides the insulation material. A thermoelectric module and a method for manufacturing the thermoelectric module are also provided.

Abstract: A method for operating an exhaust gas treatment device having at least one reservoir for a reducing agent and at least one delivery device for a reducing agent, includes at least checking a filling level of the at least one reservoir, checking a current exhaust gas mass flow, and delivering reducing agent if the filling level of the at least one reservoir is below a minimum filling level and the exhaust gas mass flow is in a low-load range. A motor vehicle having the exhaust gas treatment device is also provided.

Abstract: A method for producing a thermoelectric module and a tubular thermoelectric module include at least an inner tube, an outer tube and an interspace therebetween. At least a plurality of rings each formed by a plurality of n-doped and p-doped semiconductor elements disposed alternately in a circumferential direction are disposed in succession in an axial direction of the thermoelectric module in the interspace. On an inner side or an outer side of the semiconductor elements of one ring, electrically conductive first connections run only in the circumferential direction and, on an opposite outer side or inner side, at least one electrically conductive second connection electrically conductively connects an n-doped to a p-doped semiconductor element of an adjacent ring and runs at least in the axial direction of the thermoelectric module.

Abstract: An exhaust gas treatment unit at least includes an approach flow region, a diverting region, a backflow region and an outflow region disposed consecutively in terms of flow. The backflow region and the outflow region are disposed on an outer surface of the approach flow region and an addition unit for a reaction agent is disposed in the outflow region. A motor vehicle having an exhaust gas treatment unit is also provided.

Abstract: A holder for at least one electrode, in particular a discharge electrode which is suitable for producing a corona discharge, in an exhaust-gas line, includes a body through which an exhaust gas can flow and at least one electric contact for the at least one electrode. Preferably, the at least one electric contact is integrated into the body. An apparatus for fixing at least one electric electrode in an exhaust-gas line is also proposed. The apparatus has at least one such holder and the apparatus has a particle separator disposed downstream in exhaust gas flow direction.

Abstract: An apparatus for reducing soot particles in exhaust gas, particularly of an internal combustion engine, includes first and second at least partially electrically conductive structures with an intermediate space therebetween, a high voltage source forming a potential between the first and second structures and at least one at least partially electrically conductive intermediate structure in the intermediate space receiving an intermediate potential. A method for treating the exhaust gas includes conducting exhaust gas from the first to the second structure and applying a high voltage at least temporarily between the first and second structures. At least part of the soot particles in the exhaust gas is ionized or agglomerated and deposited on the second structure. A high voltage between potentials of the first and second structures is applied at least temporarily to the intermediate structure. An electric field is influenced favorably and disruptions from undesirable voltage flashovers are reduced.

Abstract: A device for exhaust-gas treatment near an engine includes an annular structure and a guide structure disposed in an exhaust line. An inner wall forms an inner flow passage and an outer flow passage in the annular structure. The inner wall and the guide structure form a gap in such a way that only a limited secondary flow of the exhaust gas is conducted through the inner flow passage. A motor vehicle having the device is also provided.

Abstract: An exhaust gas treatment device includes an exhaust gas treatment component for conducting a flow in a flow direction from an inflow side to an outflow side. A metering device for metering reducing agent into the exhaust gas treatment device is disposed downstream of the outflow side in the flow direction. The metering device has a metering direction which runs at least partially counter to the flow direction. The outflow side of the exhaust-gas treatment component is spanned at least partially by a porous layer and there is a spacing between the metering device and the exhaust-gas treatment component selected in such a way that injected reducing agent reaches the porous layer. A motor vehicle having the device is also provided.

Abstract: A device for separating particles from an exhaust gas of an internal combustion engine includes at least a pot with a base having a multiplicity of openings, at least one nonwoven layer positioned on the base of the pot, and a cover. The at least one nonwoven layer is positioned between the base and the cover. A motor vehicle having the device is also provided.

Abstract: A device for providing a reducing agent for an exhaust gas system includes a system heating unit for heating a reducing agent and at least one heat conduction element transmitting heat from the system heating unit to at least one of the following components: a tank, a delivery line, a filter, a pump, a valve or a sensor. A thermal heating method using a heat pipe and a motor vehicle having the device are also provided.

Abstract: An exhaust gas treatment device for off-road applications includes a housing having a cross-sectional area and a first wall. At least one pipe extends through the first wall and has a second wall with a perforation. The exhaust gas treatment device includes, in particular, a reducing agent supply for urea and an SCR catalytic converter. A method for producing a tube with a perforation for an exhaust gas treatment device and a watercraft having at least one exhaust gas treatment device are also provided.

Abstract: A method for operating a reducing agent delivery unit having a tank, a feed line running from the tank to an addition point, a return line branching off from the feed line and a valve to be activated with an electrical current for closing off the return line, includes initially applying an activation current to the valve for a first time interval. Subsequently, a holding current is applied to the valve when the first time interval has elapsed. Then, an operating variable of the delivery unit is determined and at least the activation current, the holding current and/or the first time interval are adapted as a function of the determined operating variable. A motor vehicle having a delivery unit is also provided.