Abstract: An apparatus for treating exhaust gases of an internal combustion engine having at least one main catalytic converter for chemical conversion of at least one exhaust gas component, having a hydrocarbon trap for intermediate storage of hydrocarbons, having a nitrogen oxide adsorber for intermediate storage of nitrogen oxides and having an electrically heatable heated catalytic converter, wherein the abovementioned components are arranged in a spatially delimited flow path and are traversed consecutively.

Abstract: A device for cleaning exhaust gases includes: a housing configured such that exhaust gas is flowable through the housing in a main throughflow direction; an injector configured to dose a fluid into a region of the housing through which exhaust gas flows; an evaporator arranged in the housing, the evaporator having a plurality of surface elements extending along the main throughflow direction of the housing, and the fluid being dosable into the fluid along a direction extending perpendicularly to the main throughflow direction of the housing; and a heater configured to electrically heat the evaporator.

Abstract: A device for producing an electrical field in an exhaust gas system includes an exhaust gas line in which at least one electrode is disposed. The at least one electrode is in contact with a power supply and is constructed to have at least one metal plate.

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 device for supplying reducing agent solution into an exhaust system, includes a reservoir for reducing agent solution and a delivery device for delivering reducing agent solution from the reservoir to a reducing agent infeed configuration. A delivery height to be overcome between the reservoir and the reducing agent infeed configuration is less than 1.5 meters and the delivery device includes a diaphragm pump. The device permits the dosed metering of reducing agent solution into an exhaust system of an internal combustion engine regardless of prevailing boundary conditions, in particular regardless of the position of the device, which is for example influenced by a position of a corresponding automobile. In particular, it is thus also possible to ensure reliable metering of reducing agent solution into the exhaust system even when the automobile or motor vehicle is traveling over grades. A corresponding exhaust system, method and utility vehicle are also provided.

Abstract: A tank for a reducing agent which forms ammonia or which includes ammonia, has a planar first tank volume and at least one elongate second tank volume. A motor vehicle has an internal combustion engine, an exhaust system with an SCR catalytic converter and a reducing agent metering device and a body with a roof. A tank with a planar first tank volume for the reducing agent is provided on the roof. A method for operating an SCR system of a motor vehicle which has at least two tank volumes, a reducing agent metering device and an SCR catalytic converter, 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 method for providing a reducing agent-containing gas flow in the exhaust system of an internal combustion engine includes providing at least one reducing agent precursor, evaporating the precursor to provide a gas flow, at least partially heating the gas flow to temperatures of at least 250° C., at least partially converting the precursor in the gas flow to a reducing agent and adding the reducing agent-containing gas flow to the exhaust of the engine. The method and a device provide a reducing agent-containing gas flow in a quantity being easily controllable and adaptable to dynamic changes especially in exhaust systems of mobile applications such as automobiles. A temperature of a first zone is kept at 150° C. or just below while a temperature of a second zone is kept at more than 300° C. A hydrolysis catalytic converter is hardly cooled upon receiving the precursor as a vapor, positively affecting the method.

Abstract: A method for providing a reducing agent precursor includes heating a quasi-closed evaporator volume, delimited by a wall and at least partially filled with a solution of a reducing agent precursor, to a reserve temperature of the solution to produce an atmosphere of a vapor including at least one reducing agent precursor at a reserve pressure above ambient pressure. The vapor is extracted on demand by utilizing a pressure difference between the reserve pressure and an ambient pressure. The method and a device provide reducing agent precursors that can especially be used in the selective catalytic reduction of nitrogen oxides. The method and the device allow easy dosing since, due to the pressure gradient between the vapor and an extraction line, no other conveying device is required when the vapor, which contains at least one reducing agent precursor, is dosed to a hydrolysis catalytic converter.

Abstract: A device and method for providing a gaseous substance mixture which includes at least one reducing agent and/or at least one reducing agent precursor, includes a reservoir for an aqueous solution which includes at least one reducing agent precursor that can be flow connected to an evaporator chamber, and a device for dosing the aqueous solution in the evaporator chamber. A device can heat the evaporator chamber to a temperature higher than or equal to a critical temperature, in which the aqueous solution is at least partially evaporated. The device and method enable reducing agent to be provided for selective catalytic reduction of nitrogen oxides in the exhaust of an internal combustion engine. Preferably, an evaporator unit is configured as the evaporator chamber and a hydrolysis catalytic converter is disposed outside the exhaust system. As a result, the size of the hydrolysis catalytic converter is reduced, allowing compact construction.

Abstract: An apparatus for treating exhaust gas of an internal combustion engine, includes a feed conduit feeding aqueous solution, a hydrolysis catalytic converter connected to the feed conduit and an SCR catalytic converter through which exhaust gas flows. A rod-shaped heating element heats at least parts of the feed conduit and/or hydrolysis catalytic converter. The apparatus provides a compact structure of a feed conduit heated by a rod-shaped element and a corresponding hydrolysis catalytic converter, with which an aqueous solution containing urea can be evaporated and then hydrolyzed to a gas stream containing ammonia. This gas stream serves as a reducing agent in the SCR process. The compact configuration allows installation in very confined space conditions. The hydrolysis catalytic converter, through which exhaust gas does not flow, permits the volume of the hydrolysis catalytic converter to be decisively reduced, since significantly smaller mass flows of gas need to be hydrolyzed therein.

Abstract: A device and a method for providing a gaseous substance mixture including at least one of a reducing agent and/or a reducing agent precursor, include a reservoir for an aqueous solution including at least one reducing agent precursor, from which the aqueous solution can be delivered into at least one metering line having a dispensing opening by a delivery device, and a device for heating the metering line above a critical temperature greater than the boiling temperature of water. Complete evaporation of an aqueous solution including urea and subsequent hydrolysis to form a substance mixture including ammonia, are carried out. The substance mixture is metered as a reducing agent into an SCR catalytic converter. Carrying out the evaporation outside the exhaust system uses considerably smaller hydrolysis catalytic converters, which is space-saving and cost-saving compared to conventional devices for providing a reducing agent for selective catalytic reduction of nitrogen oxides.

Abstract: A device for treating exhaust gas of an internal combustion engine includes a reducing agent solution evaporator, a hydrolysis catalytic converter connected thereto for hydrolysis of urea to form ammonia and an SCR catalytic converter for selective catalytic reduction of nitrogen oxides. The evaporator includes an evaporator unit providing a gaseous substance mixture including at least one reducing agent precursor and/or reducing agent. The evaporator unit evaporates an aqueous solution including at least one reducing agent precursor. The SCR catalytic converter is in an exhaust line, and the evaporator and the hydrolysis catalytic converter are outside of and can be connected to the exhaust line. A sufficiently large quantity of reducing agent for selective catalytic reduction of nitrogen oxides in the SCR catalytic converter can be provided, while permitting a smaller volume of the hydrolysis catalytic converter than in the prior art, since it is not traversed by exhaust gas.

Abstract: A carrier body includes an overall surface having at least one coating portion with a catalytically active coating including at least one type of catalyst elements disposed in dispersed form at a surface of the carrier body. The catalyst elements have a mean spacing along the surface of at least 3 micrometers. The surface has a mean roughness depth Rz of 2 to 10 micrometers. The carrier body has a maximum increase in pressure loss compared to a carrier body with a smooth and uncoated surface of 25%. A process for producing a carrier body and an exhaust gas treatment unit and a vehicle having a carrier body, are also provided.

Abstract: A configuration for treating exhaust gases of an internal combustion engine having a predetermined displacement volume, includes an exhaust gas recirculation line. Exhaust gas flowing through the exhaust gas recirculation line interacts with a turbocharger. A screening layer is provided in the exhaust gas recirculation line upstream of the turobcharger. The screening layer is larger than an average cross section of the exhaust gas recirculation line. A motor vehicle having at least one such configuration is also provided.

Abstract: A device for reducing the number of particles in the exhaust gas of an internal combustion engine includes at least two structures through which an exhaust gas can flow, initially through a first structure and then through a second structure during operation. An electrical potential difference can be generated between the structures. In this way, the exhaust gas downstream of the second structure has fewer particles, averaged over time, than the exhaust gas upstream of the first structure. In addition, the particles downstream of the second structure have a larger mean diameter than those upstream of the first structure, so that it is possible to reduce emissions, in particular of fine dust, in the exhaust gas of internal combustion engines. A method for reducing the number of particles in the exhaust gas of an internal combustion engine, is also provided.

Abstract: A honeycomb body includes ceramic walls all being entirely formed of printed layers forming channels through which a fluid can flow. The channels lie next to one another. At least one of at least one measuring sensor or electrically conductive mass forms a monolithic, unitary structure with one of the ceramic walls. Sensor material may be used as an alternative to ceramic material. A method of producing the honeycomb body is also provided.

Abstract: A method and a device produce a fleece of metallic fibers in a layer in which the metallic fibers are welded to one another to form the fleece. A welding process is repeatedly carried out with regard to a portion or section of the fleece. Such metallic fiber fleeces are used, in particular, for exhaust gas treatment units in the automobile industry.

Abstract: A device for the treatment of an exhaust gas flow includes at least one inflow channel with a front region and a rear region and at least one return flow channel. A first coating is provided in the rear region of the at least one inflow channel. The coating assists an exothermal reaction of the exhaust gas flow. A device is formed in the front region of the inflow channel for the transfer of heat from a return flow channel. A method for operating a device for the treatment of an exhaust gas flow, a vehicle having the device and an operating method for an exhaust gas system of a vehicle having the device, are also provided.

Abstract: An open particulate trap for purifying exhaust gases from mobile internal combustion engines includes at least one at least partially structured metal foil and at least one high-temperature-resistant fiber layer having metal fibers defining the open particulate trap for purifying exhaust gases from mobile internal combustion engines. The fiber layer has a section and, at least in the section, a catalytically active coating being an SCR catalyst. An exhaust system of an automobile internal combustion engine includes an exhaust pipe defining a flow direction and at least the following components disposed in succession in the flow direction: a reducing-agent feed for supplying liquid urea and the particulate trap.