Abstract: An exhaust gas purification system for diesel engines of utility motor vehicles, includes an oxidation catalytic converter disposed in an exhaust tract, a reducing agent dosing device having a reducing agent injection device, a reducing agent decomposition device, a soot particle separator, a reduction catalytic converter and a muffler for the exhaust gases. The oxidation catalytic converter is disposed within a minimum distance directly downstream of outlet valves of the engine and a maximum distance of 0.75 m from an exhaust collecting pipe or an outlet of a turbocharger. The reducing agent decomposition device, the soot particle separator and the reduction catalytic converter are disposed separately from the oxidation catalytic converter.

Abstract: A honeycomb body includes at least a housing and a honeycomb structure having a plurality of channels. The honeycomb structure is formed of at least one at least partially structured metallic layer that forms connecting points fixing the honeycomb structure. At most 20% of inner contact points in a cross section of the honeycomb structure form a connection point, and the connection points are disposed at a distance from each other in such a way that respective connection-free regions of the same size surround each of the connection points. An exhaust-gas purification unit and a motor vehicle are also provided.

Abstract: The invention relates to a particle filter (1) for an exhaust gas system (2), and to a method for producing a particle filter. The particle filter (1) comprises a plurality of flow channels (5), which extend from a first end face (6) towards a second end face (7) and which are separated from one another by porous channel walls (8). On the end faces (6, 7), the flow channels (5) each have mutual closing means (9) such that an exhaust gas (10) enters a flow channel (5) that is open on the first end face (6), flows through the channel wall (8), and escapes from the particle filter (1) by way of an adjacent flow channel (5) that is open on the second end face (7).

Abstract: A method for determining an amount of liquid removed from a tank per unit time includes discontinuously feeding the liquid to exhaust gas of an internal combustion engine by at least feeding the liquid through an injection line into the exhaust gas, measuring pressures simultaneously at least at two points in the injection line and determining an amount of liquid fed in per unit time from the measured pressures. The amount of liquid removed between a first point in time and a second point in time is further derived by integrating the amounts of liquid removed per unit time over a period of time from the first point in time to the second point in time. The method allows the precise consumption of the liquid to be calculated and the remaining amount of liquid in the tank to be additionally determined. On-board diagnosis is further possible with the method.

Abstract: A method for operating a device for the dosed supply of a liquid includes: detecting a demanded dose amount of the liquid; activating an electric drive of a pump to move a seal in a delivery direction from an inlet to an outlet to deliver the liquid by application of an operating voltage to the electric drive; stopping operation of the pump when the delivered amount of the liquid corresponds to the demanded dose amount; stopping movement of an eccentric; and maintaining a holding voltage at the electric drive. In response to the holding voltage, a holding torque is exerted on the eccentric and a movement of the eccentric counter to the delivery direction is prevented.

Abstract: A method for operating a dosing device for metering an additive to an exhaust-gas treatment device includes determining a dosing amount of additive required by the exhaust-gas treatment device in step a). Subsequently, in step b), an operating mode for the dosing device is determined by carrying out at least steps b.1) and b.2). In step b.1), at least one characteristic operating value of at least one component of the dosing device is provided being definitive of a degree of aging of the dosing device. In step b.2), an operating mode for the dosing device is set in dependence on the characteristic operating value from step b.1). In step c), the dosing device is operated with the set operating mode so that the dosing amount required in step a) is supplied to the exhaust-gas treatment device. A motor vehicle having a dosing device is also provided.

Abstract: An exhaust system includes at least one exhaust gas purification component, at least one exhaust line, at least one connecting device for connecting the exhaust system to an internal combustion engine of a motor vehicle and at least one fastening element for additionally fastening the exhaust system to the motor vehicle. The purification component can oscillate at a first resonance frequency range of less than 150 Hz in a fastened state. The purification component can oscillate due to vibrations of the engine at least when the engine is started or switched off. This, in particular, allows ash residues to be removed from a purification component during starting of the motor vehicle, so that maintenance expense for the purification component is reduced and effective operation thereof is possible over the long term. A motor vehicle having an exhaust system and a method for operating the motor vehicle are also provided.

Abstract: A method for operating a device configured to deliver a liquid includes: a) back-suctioning a liquid situated in a pressure line section counter to a usual delivery direction by at least one pump; b) monitoring at least one operating parameter of the at least one pump during the back-suctioning, the at least one operating parameter being representative of a counterpressure that the at least one pump operates against during the back-suctioning; and c) detecting an increase in the counterpressure, and stopping the back-suctioning.

Abstract: A device for providing a liquid additive includes at least one first pump chamber (3) for conveying the liquid additive, and a rotary drive. The first pump chamber is arranged around a drive axis of the rotary drive. Inside the first pump chamber, at least one seal is formed, which can be displaced from the rotary drive around the drive axis. The device has at least one second pump chamber, which is arranged along the drive axis adjacent to the first pump chamber.

Abstract: Tank for an operating liquid for a motor vehicle. Tank (1) for an operating liquid for a motor vehicle (2) with a tank wall (3) made of plastic, having an opening (4) and an insert (5), made of metal, arranged at the opening (4), and a flexible sealing element (6) for interconnecting, in a liquid-tight manner, the tank wall (3) and the insert (5), wherein, on account of thermal expansion of the tank wall (3) and of the insert (5), relative displacements (7) arise between the tank wall (3) and the insert (5) and the flexible sealing element (6) is configured such that sealing faces (8, 16) are formed both on the insert (5) and on the tank wall (3), against which faces the sealing element (6) bears independently of the relative displacements (7).

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: An electrically heatable honeycomb body assembly includes an electrical connection of sheet metal layers at a connection pin. A honeycomb body has a metal casing with an inner periphery, through which the connection pin is led in a bushing and electrically insulated. The sheet metal layers are alternately coarsely structured and finely structured or smooth sheets together forming a stack with uppermost and lowermost layers and channels for an axial gas flow between the layers. The connection pin runs radially approximately perpendicular to the layers and is metallically connected to at least two or all of the layers through at least one intermediate piece. The uppermost sheet metal layer preferably runs approximately parallel to the metal casing over at least 35% of the inner periphery and is separated therefrom only by an air gap. Simple production of an operationally safe and very uniformly electrically heatable honeycomb body is provided.

Abstract: A device includes a pipeline section for an exhaust gas flow. The pipeline section has an inlet end, an outlet end, a rectilinear section and a protuberance having an opening for installing a metering device for a liquid additive (in particular urea/water solution) in the rectilinear section. The protuberance has a height and an extent and the extent is at least twice as large as the height. At least one respective disk-shaped honeycomb body is disposed at each of the inlet end and the outlet end. A central axis of the opening is oriented toward one of the disk-shaped honeycomb bodies. A motor vehicle having the device is also provided.

Abstract: A thermoelectric module extends in a longitudinal direction and includes an outer tube, an inner tube disposed within the outer tube and an interspace between the tubes. At least one first strip-shaped structure and one second strip-shaped structure are provided. The first strip-shaped structure extends from a first connection on the inner tube and the second strip-shaped structure extends from a second connection on the outer tube in opposite directions in at least one circumferential direction or in the longitudinal direction and at least partly form an overlap at least in the circumferential direction or in the longitudinal direction. At least one pair of semiconductor elements is disposed in the region of the overlap. A method for producing a thermoelectric module and a thermoelectric generator are also provided.

Abstract: A honeycomb body for exhaust gas aftertreatment includes a first end face, a second end face, a central axis that penetrates the two end faces and a length. The honeycomb body has at least one at least partially structured metallic layer which is disposed about the central axis. A structure of the at least one metallic layer has elevations and depressions which extend at least over part of the length of the honeycomb body and run obliquely to the central axis. At least one metallic connecting strip is provided between adjacent regions of the at least one metallic layer. The metallic connecting strip is shorter than the length of the honeycomb body and forms a brazed connection or welded connection to the adjacent regions. A method for producing such a honeycomb body and a motor vehicle having the honeycomb body are also provided.

Abstract: A device for supplying a liquid additive for a motor vehicle includes a tank for storing the liquid additive and a delivery unit for delivering the liquid additive out of the tank. A sensor emits and receives waves and is configured to measure a fill level of the liquid additive in the tank by way of a propagation time measurement of the waves along a measurement path to a liquid surface in the tank and back to the sensor. The measurement path runs at least partially through a measurement duct. At least one back-flushing line ends in the measurement duct so that flushing of the measurement duct to the tank can be performed, in such a way that the measurement duct is kept clean and/or is cleaned. A motor vehicle having the device is also provided.

Abstract: A container for a tank for storing a liquid additive includes a housing having a heater and at least one drivable apparatus for promoting convection in the housing. A motor vehicle includes a tank for storing a liquid additive and an exhaust gas system having a metering or adding device for the liquid additive. A container is inserted into the tank wall and a plurality of functional components is provided in the container for conveying the liquid additive from the tank through the container to the metering or adding device.

Abstract: A honeycomb body includes sheet metal layers forming a central current path to a radial connecting pin. A metal casing has an inner periphery and a feedthrough guiding and insulating the pin. The layers are alternate coarsely structured and finely structured or smooth sheets forming a stack with uppermost and lowermost layers forming axial gas channels. The pin is metallically connected to two or all of the layers directly or through an intermediate piece by an electrically conductive or welded connection. The current path has an electrical resistance per unit length in the connection region being greater than an average electrical resistance per unit length in the stack. The uppermost layer runs approximately parallel to the casing over 35% or 40% of the inner periphery and is separated from the casing by an air gap. Simple manufacture of a highly uniform, reliably operating, electrically heatable honeycomb body is thus possible.

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 method for feeding reducing agent or reducing agent precursor into exhaust systems of mobile internal combustion engines and an exhaust system are preferably used for internal combustion engines with high nitrogen oxide compound emissions. A feed time is established. An exhaust parameter and/or necessary quantity of reducing agent is determined and a feed state of the reducing agent is defined. The reducing agent is treated if the feed state does not correspond to a stored state. The reducing agent feed to the exhaust system takes place last. The steps are repeated multiple times. This permits reducing agent to be fed into an exhaust system in a state suitable for the exhaust temperature, so that complete conversion of reducing agent takes place and selectively catalytic reduction is also ensured. This reduces the quantity of electrical energy necessary for converting reducing agent. A motor vehicle having the system is also provided.