Abstract: A conveying unit which can be mounted in a tank for conveying a liquid additive from the tank includes a filling level sensor which can emit and receive waves that are reflected back to the filling level sensor at a surface of liquid in the tank, so that a filling level measurement can be carried out by measuring the transit time of the waves. The conveying unit has at least one additional sensor device or sensor with which it is possible to determine if there is frozen additive in the tank. A tank for storing a liquid additive, a motor vehicle having the conveying unit and a method for determining a liquid additive quantity in a tank are also provided.

Abstract: A method for operating an exhaust gas system of an internal combustion engine having at least one adsorber for the adsorption of hydrocarbons, a catalytic converter disposed downstream of the adsorber for converting hydrocarbons and at least one heating device disposed between the adsorber and the catalytic converter, includes adapting operation of the heating device in dependence on a state of aging of the catalytic converter. A method for operating a motor vehicle and a motor vehicle having the system are also provided.

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 conveying unit which can be mounted in a tank for conveying a liquid additive from the tank includes a filling level sensor which can emit and receive waves that are reflected back to the filling level sensor at a surface of liquid in the tank, so that a filling level measurement can be carried out by measuring the transit time of the waves. The conveying unit has at least one additional sensor device or sensor with which it is possible to determine if there is frozen additive in the tank. A tank for storing a liquid additive, a motor vehicle having the conveying unit and a method for determining a liquid additive quantity in a tank are also provided.

Abstract: A method for operating an exhaust gas system of an internal combustion engine having at least one adsorber for the adsorption of hydrocarbons, a catalytic converter disposed downstream of the adsorber for converting hydrocarbons and at least one heating device disposed between the adsorber and the catalytic converter, includes adapting operation of the heating device in dependence on a state of aging of the catalytic converter. A method for operating a motor vehicle and a motor vehicle having the system are also provided.

Abstract: A method for operating a motor vehicle which has a drive and an exhaust system with at least one controllable heating device to be placed in contact with exhaust gas, includes at least the following steps: (a) detecting at least one operating parameter of the exhaust system, (b) determining at least one influential variable of the heating device, (c) comparing the at least one influential variable with a target parameter of the exhaust system, and (d) activating the heating device in such a way that the operating parameter reaches the target parameter. A motor vehicle having a drive and an exhaust system is also provided.

Abstract: An electrically heatable honeycomb body is formed with at least one wound stack of sheet-metal foils. A first end of the stack is connected to an electrical terminal and a second end is connected to an electrical ground. The stack has a plurality of sheet-metal foils which are in electrical contact with one another and which are at least partially structured and determine, in the direction of the structures, a height of the stack. The stack has at least one curvature with a small radius of curvature and a relatively large radius of curvature. A curvature section including the at least one curvature has at least one zone with increased electrical resistance starting from the small radius of curvature and extending over part of the height of the stack. A motor vehicle having at least one honeycomb body, is also provided.

Abstract: A configuration contains a first honeycomb body, which is formed by at least one convoluted or wound stack and has a plurality of channels allowing a flow, wherein a first end of the stack is connected to an electric connection and a second end is connected to an electric ground. The stack contains a plurality of sheet metal foils in electric contact with each other, the foils being structured at least in some regions. At the same time, the honeycomb body has support pins for connecting to a second honeycomb body, the pins have a distance of at least 25 mm from each other along the course of the stack at least outside an inner region. A method introduces support pins into the honeycomb body and a device receives a honeycomb body and/or for positioning support pins. The device enables the installation of the support pins in the honeycomb body.

Abstract: A device includes an electrically heatable honeycomb body, particularly for treating an exhaust gas flow of a mobile internal combustion machine. The device includes sheet metal foils forming channels and being in electrical contact with a housing. The housing has a terminal for connection to a voltage source, a plurality of contact points disposed remotely from the terminal for contacting the sheet metal foils and a respective contact conductor between the terminal and each contact point. The contact conductors have the same electrical resistance. A motor vehicle having at least one such device is also provided.

Abstract: An exhaust-gas treatment unit includes at least one housing and a honeycomb structure having channels running between end faces of the honeycomb structure and being formed by at least partially structured metal foils having a material thickness of at most 50 ?m. At least part of the metal foils is constructed with a fold of a predefined width at least in the region of an end face, and the metal foil is welded to itself at a weld seam in the region of this fold. A method for producing such an exhaust-gas treatment unit using a suitable welding process is also provided.

Abstract: A method for regenerating at least one particle agglomerator of an exhaust gas after-treatment system of an internal combustion engine of a motor vehicle, includes operating the internal combustion engine in at least one operating phase in such a way that a sufficient portion of nitrogen dioxides is directly produced in the exhaust gas in order to ensure a conversion of particles containing carbon in the at least one particle agglomerator. A motor vehicle suitable for carrying out the method is also provided.

Abstract: A device includes an electrically heatable honeycomb body, particularly for treating an exhaust gas flow of a mobile internal combustion machine. The device includes sheet metal foils forming channels and being in electrical contact with a housing. The housing has a terminal for connection to a voltage source, a plurality of contact points disposed remotely from the terminal for contacting the sheet metal foils and a respective contact conductor between the terminal and each contact point. The contact conductors have the same electrical resistance. A motor vehicle having at least one such device is also provided.

Abstract: A configuration contains a first honeycomb body, which is formed by at least one convoluted or wound stack and has a plurality of channels allowing a flow, wherein a first end of the stack is connected to an electric connection and a second end is connected to an electric ground. The stack contains a plurality of sheet metal foils in electric contact with each other, the foils being structured at least in some regions. At the same time, the honeycomb body has support pins for connecting to a second honeycomb body, the pins have a distance of at least 25 mm from each other along the course of the stack at least outside an inner region. A method introduces support pins into the honeycomb body and a device receives a honeycomb body and/or for positioning support pins. The device enables the installation of the support pins in the honeycomb body.

Abstract: A method for operating a motor vehicle which has a drive and an exhaust system with at least one controllable heating device to be placed in contact with exhaust gas, includes at least the following steps: (a) detecting at least one operating parameter of the exhaust system, (b) determining at least one influential variable of the heating device, (c) comparing the at least one influential variable with a target parameter of the exhaust system, and (d) activating the heating device in such a way that the operating parameter reaches the target parameter. A motor vehicle having a drive and an exhaust system is also provided.

Abstract: An electrically heatable honeycomb body is formed with at least one wound stack of sheet-metal foils. A first end of the stack is connected to an electrical terminal and a second end is connected to an electrical ground. The stack has a plurality of sheet-metal foils which are in electrical contact with one another and which are at least partially structured and determine, in the direction of the structures, a height of the stack. The stack has at least one curvature with a small radius of curvature and a relatively large radius of curvature. A curvature section including the at least one curvature has at least one zone with increased electrical resistance starting from the small radius of curvature and extending over part of the height of the stack. A motor vehicle having at least one honeycomb body, is also provided.

Abstract: A honeycomb body assembly includes a honeycomb body with channels through which a fluid can flow. The channels extend between two end faces. At least one sensor extends at least partly into the honeycomb body. A first partial volume of the honeycomb body is defined between a first end face and the at least one first sensor. The honeycomb body has a lower capacity for oxygen in the first partial volume than in at least one further partial volume. An exhaust system with a space-saving configuration of such a honeycomb body is also disclosed.

Abstract: A method for operating a motor vehicle which has, as components, a drive device, an exhaust system for exhaust gases of the drive device, at least one heating apparatus of the exhaust system and at least one energy converter, includes at least the following steps: (a) detecting a possibility of energy recovery, (b) activating the at least one energy converter, (c) feeding energy recovered by the at least one energy converter to the heating apparatus, (d) operating the heating apparatus for heating the exhaust gas with the recovered energy, and (e) detecting an end of the possibility of energy recovery, after which the energy converter is deactivated and the recovery of energy is ended. A motor vehicle for carrying out the method is also provided.

Abstract: A catalyst carrier body has a geometrical longitudinal axis, a honeycomb body and a housing. A corrugated casing with an outer side and an inner side is disposed between the honeycomb body and the housing. The corrugated casing is connected to the housing at attachment sections on the outer side thereof by brazing. The attachment sections lie substantially on a common circumferential line and have the narrowest possible width in direction of a longitudinal axis. The attachment sections have an overall surface area permitting them to securely hold the honeycomb body under operating conditions. A high retention degree for the connection between the honeycomb body and housing can thus be achieved even with a shrinking of the diameter of the honeycomb body at end sides during the service life thereof.

Abstract: A honeycomb body, particularly a catalyst carrier body that serves to clean an exhaust gas of an internal combustion engine, includes a honeycomb structure joined to a casing tube by a joining techniques. The honeycomb structure is at least partially surrounded by an inner sleeve and at least partially by an outer sleeve. The inner sleeve and the outer sleeve are placed in an axial section between the casing tube and the honeycomb structure. The adjacently disposed components are joined to one another by a plurality of joining locations, and an open spring-damper system is formed by at least one sleeve. A long-life system for fixing a honeycomb structure in a casing tube is thus provided which permits thermal compensating expansions and distinctly reduces the tendency of the honeycomb structure to vibrate with regard to the casing tube. A method for producing such a honeycomb body is also provided.

Abstract: An assembly includes a honeycomb body secured by an inner casing tube in a housing, in particular a housing of an exhaust system of an internal combustion engine. The inner casing tube has an overall length which is bounded axially by two edges and is substantially smaller than the axial length of the honeycomb body. The inner casing tube is also disposed in an approximately axially central position around the honeycomb body and is connected, in particular brazed, thereto in at least one axial connection region. The inner casing tube has a region within the axial connection region in which it is connected to the honeycomb body on the inside or attached directly adjacent the latter on the outside and is connected to the housing. Regions of the inner casing tube which are not connected to the housing but are connected to the honeycomb body toward the inside are constructed as radially elastic spring elements.