Abstract: An evaporation unit for evaporating an aqueous solution including at least one reducing agent precursor, includes at least one evaporator cavity defined by a wall made of a material containing titanium. A heat-imparting layer disposed outside the evaporator cavity is made of a material having a thermal conductivity of at least 100 W/mK (Watts per meter and Kelvin) and is connected to the evaporator cavity in a heat-conducting manner. A heating layer disposed outside the heat-imparting layer is connected in a materially integral manner to the heat-imparting layer. The evaporator unit can be controlled in a highly dynamic manner, thereby enabling a sufficiently high amount of ammonia to be produced even during rapid load changes and consequently significant increases in the concentration of nitric oxide in the exhaust gas of the internal combustion engine. A device and a motor vehicle having the evaporation unit are also provided.

Abstract: An SCR system includes at least one reducing agent tank, a filter, a feed device and a reducing agent line for feeding and conducting a reducing agent. At least one compensation element has a volume through which the reducing agent flows and is suitable for varying the volume as a function of a reducing agent pressure. A motor vehicle having an SCR system is also provided.

Abstract: A device for evaporating at least one of the following reactants: a reducing agent precursor solution and a reducing agent precursor, includes at least one electrically heatable heating zone having at least one electrically operable heating element with a heating resistor that is self-regulated about a significant temperature. A method and the device for evaporating a reactant allow a simple control of an evaporation process, especially of a urea/water solution, to provide a reducing agent, especially in an SCR process. The heating resistors have a significant temperature that corresponds to a control temperature of the heating resistor. The need for additional control electronics can be removed by adjusting a correspondingly steep curve within a range.

Abstract: A process for producing a fleece having metallic wire filaments, includes at least the following steps: a) forming a layer including wire filaments; b) producing first cohesive connections between at least some of the metallic wire filaments in a first joining process; and c) producing second cohesive connections between metallic wire filaments in a second joining process. A process for producing a honeycomb body having at least one fleece, a fleece, a honeycomb body, an apparatus and a vehicle using fleeces in the treatment of exhaust gas from motor vehicles, are also provided.

Abstract: A method and a device for providing ammonia for the selective catalytic reduction of nitrogen oxides in the exhaust system of an internal combustion engine, include the following steps: a) recording at least one actuating variable for influencing the state of the internal combustion engine; b) calculating a possible nitrogen oxide emission of the internal combustion engine on the basis of an evaluation of the at least one measured variable; c) calculating an ammonia quantity which corresponds to the possible nitrogen oxide emission; and d) initiating the provision of the corresponding ammonia quantity by exhaust-gas-external evaporation in an evaporator and exhaust-gas-external hydrolysis of aqueous urea solution, wherein at least one of the following values: i) the heating power of the evaporator or ii) the quantity of aqueous urea solution supplied to the evaporator, is regulated on the basis of the ammonia quantity calculated in step c).

Abstract: An apparatus includes at least one tank having a tank bottom and a delivery unit for a liquid. The delivery unit is disposed in a chamber on the tank bottom and the chamber has at least one heater.

Abstract: A device includes at least one tank having a tank bottom and a delivery unit for a liquid. The delivery unit is disposed in a chamber on the tank bottom and the chamber includes at least one heater. The tank preferably has at least one local ventilation heater extending from a discharge for liquid on the tank bottom over at least one tank side to the vicinity of a tank top.

Abstract: A device for providing a liquid reducing agent includes a reducing agent tank for storing a reducing agent. The reducing agent tank has a tank bottom including a separate chamber. A dosing or metering unit extracts reducing agent from the reducing agent tank at an extraction point disposed at the separate chamber. The dosing unit is disposed within the separate chamber. A motor vehicle having the device is also provided.

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 and device for evaporating a predeterminable volume of fluid includes successive addition of partial volumes of the predeterminable volume to a supply line at different adding rates, at least partially evaporating the partial volumes forming vapor film between them and a supply line wall, conveying the partial volumes through the supply line to an evaporator surface, and applying the partial volumes to an evaporator surface region varying as a function of mass and/or volume adding rate of the partial volume, permitting effective evaporation of fluid, particularly urea/water solution. Utilization of the highest possible proportion of evaporator surfaces is achieved by mass and/or volume addition rate-dependent distribution of impingement surfaces on the evaporator surface. This heating strategy in the supply line region ensures the Leidenfrost effect when individual partial volumes are added.

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: A method for producing an exhaust gas cleaning component having a carrier structure with an inflow side, an outflow side, a predefined through-flow direction and a deflection surface disposed opposite the outflow side, includes at least the following steps: providing the carrier structure, subjecting the carrier structure to an exhaust gas flowing from the inflow side to the outflow side in the predefined through-flow direction, determining a distribution of flow velocities on the outflow side of the carrier structure, and configuring the shape of the deflection surface with at least one backpressure element in dependence on the distribution of flow velocities on the outflow side, so that the distribution of flow velocities is equalized. An exhaust gas cleaning component and a motor vehicle having the exhaust gas cleaning component are 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: An evaporation unit for producing a gas flow including ammonia, in particular in connection with an SCR system in motor vehicles, includes at least a housing, at least one meandering flow channel delimited by a closed wall and having an inlet and an outlet and at least one heat conductor disposed in a first evaporation section of the at least one flow channel coaxially between the housing and the wall. A device and a motor vehicle having the evaporation unit are also provided.

Abstract: A gas probe, in particular a lambda probe for the analysis of exhaust gases from a mobile internal combustion engine, includes at least one protective device, at least partly surrounding a sensitive sensor element of the gas probe, which comes into contact with a gas. The at least one protective device includes a gas contact face which at least partly has a hygroscopic surface.

Abstract: A device for exhaust-gas treatment includes at least one housing with an inner surface and at least one sensor foil disposed in the housing. The sensor foil is formed at least with a sensor element and a conductor element. The sensor foil is also provided with an edge up to which the conductor element extends and which bears against the inner surface of the housing. The housing also has an opening for contacting of the conductor element. The opening is surrounded on the inner surface by an electrical insulating layer.

Abstract: An exhaust gas treatment device includes at least a housing and a second exhaust gas treatment unit which is disposed at a distance from the housing and extends into the housing. The housing has an opening that is disposed laterally relative to the second exhaust gas treatment unit and extends laterally at least across 50% of the second exhaust gas treatment unit which extends into the housing. A motor vehicle having the exhaust gas treatment device is also provided.

Abstract: A delivery device for a reducing agent includes a metallic housing, at least one externally mounted metal suction pipe and an external pressure port. A metallic base plate, at which at least one pump and ducts are provided, is disposed inside the housing. The suction pipe, the housing, the metallic base plate, and the pump are in heat-conducting contact with each other. An elongate heating element is disposed next to the suction pipe. A tank configuration for a reducing agent and a motor vehicle having a tank configuration, are also provided.

Abstract: A device for treating exhaust gas containing soot particles, includes at least one ionization element for ionizing soot particles and at least one separation device having a surface precipitator for depositing ionized soot particles. The at least one surface precipitator includes at least two at least partially electrically conductive neutralization regions that are electrically insulated from each other in order to neutralize ionized soot particles. A method for converting soot particles of an exhaust gas includes applying different electric potentials. A motor vehicle includes the device and carries out the method.

Abstract: A method for heating a delivery device for a reducing agent includes providing the delivery device with a return valve which is in an open position when an opening current is supplied to the return valve and which is in a closed position and operates as a heater when a heating current that is smaller than the opening current is supplied to the return valve. The return valve is preferably in heat-conducting contact with a metallic base plate of the delivery device.