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.

Abstract: A honeycomb body includes at least one housing and metal foils forming a channel structure. The channel structure is fastened to the housing by a multiplicity of linear brazed connections. A production method for providing the linear brazed connections between the channel structure and the housing and an exhaust gas treatment component having the honeycomb body in an exhaust system of a motor vehicle, are also provided.

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 includes an injector for a liquid having at least one pressure sensor, preferably an integrated pressure sensor. The device is used, in particular, for adding liquid reducing agent to an exhaust gas line of a motor vehicle. A configuration having the device and methods of using the device and the configuration are 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 for converting soot particles of an exhaust gas includes providing at least nitrogen dioxide or oxygen in the exhaust gas, ionizing soot particles with an electric field, depositing electrically charged soot particles on inner channel walls of at least one surface precipitator, and bringing at least nitrogen dioxide or oxygen into contact with the deposited soot particles on the inner channel walls of the at least one surface precipitator. A device for carrying out the method includes at least one surface precipitator having a plurality of channels through which the exhaust gas can flow and extending between an inlet region and an outlet region, and at least one deposit inhibitor for electrically charged soot particles provided in at least part of the inlet region, especially allowing the soot particles to be evenly deposited and the surface precipitator to be continuously regenerated.

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: An injection nozzle for supplying reducing agent to an exhaust gas system includes a plurality of outlet openings, each of which can generate different droplets of the reducing agent. A device for the treatment of exhaust gases includes an exhaust gas treatment unit and at least one corresponding injection nozzle, in which at least two groups of outlet openings form different impingement regions on the exhaust gas treatment unit.

Abstract: A honeycomb body includes a housing and a honeycomb structure with a plurality of channels. The honeycomb structure is formed by at least one at least partially structured metallic layer which forms connecting points that fix the honeycomb structure in place. A cross section of the honeycomb structure has radial zones with the connecting points. At least 1% and no more than 20% of inner contact points of the at least one at least partially structured metallic layer in the cross section form a connecting point in at least one zone. The connecting points have lengths in a structure direction being different in at least two radial zones.

Abstract: A method and a device for treating exhaust gas containing particles, include a particle separator and at least one particle agglomeration device positioned upstream of the particle separator in exhaust gas flow direction. The particle agglomeration device includes at least one apparatus for forming an electrical field and a particle buffer storage device, through which the exhaust gas can flow. The particles are stored on top of each other at the particle buffer storage device in such a way that particle agglomerates are formed, which are removed from the particle buffer storage device again after a short period of time and supplied to the particle separator for conversion. A motor vehicle having the device and performing the method is also provided.

Abstract: Honeycomb bodies, especially those used in an exhaust system of an internal combustion engine, contain a housing and a metal matrix with an average starting diameter. The matrix is connected to the housing, whereby at least one contraction limiter that causes an outward directed tensile stress in at least one part of the matrix is provided. The average starting diameter of the matrix is reduced by 5%, preferably by a maximum of 2%, during and/or after being subjected to thermal stress.

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.

Abstract: A method for operating an exhaust system including at least one oxidation catalytic converter, at least one configuration for selective catalytic reduction and at least one measuring probe for determining the effectiveness of the configuration, includes at least determining a conversion effectiveness of the configuration using the at least one measuring probe and calculating an effectiveness of nitrogen monoxide conversion in the oxidation catalytic converter from the determined conversion effectiveness. In this way, an estimate of the effectiveness of the nitrogen monoxide conversion to nitrogen dioxide of an oxidation catalytic converter in the exhaust system can be obtained without additional measuring probes in or on the oxidation catalytic converter. This reduces the maintenance frequency of the exhaust gas system and at the same time enables precise regulation of the exhaust gas conversion as a whole. An exhaust system and a vehicle having an exhaust system are also provided.

Abstract: A device for the purification of exhaust gases in an exhaust gas system of an internal combustion engine includes at least one exhaust gas purification component through which exhaust gas can flow. The exhaust gas purification component is disposed in an outer pipe formed of titanium or a titanium alloy and, in particular, all structural components of the device are formed of titanium or a titanium alloy. A motor vehicle having the device is also provided.

Abstract: A honeycomb body, especially a particulate filter, particularly for motor vehicle exhaust purification, includes inner walls defining passages with an entry and exit. Cavities free of walls in at least one subregion contain at least one spherical free space having a largest cross-sectional area at least 10 times a cross-sectional area of the passages in the subregion. The honeycomb body is wound, twisted or layered from at least one metal sheet having layers with a structuring forming the passages, at least in the subregion. The sheet-metal layers have holes with an area greater than 10 times the cross-sectional area of the passages in the subregion. The holes form cavities in at least 5 successive layers overlapping with an area at least 10 times the cross-sectional area of the passages in the subregion. The holes are double or more than triple the hydraulic diameter of the passages opening into the cavity.

Abstract: A honeycomb body includes at least a housing and a honeycomb structure with a multiplicity of channels. The honeycomb structure includes at least one at least partially structured metallic layer forming connecting points which fix the honeycomb structure. A cross section of the honeycomb structure has radial zones with connecting points. At least 1% and at most 20% of inner contact points of the at least one at least partially structured metallic layer in at least one of the zones forms a connecting point in the cross section. The channels have a different channel cross section in at least two of the radial zones. A motor vehicle having the honeycomb body is also provided.

Abstract: A honeycomb body includes a housing and a honeycomb structure with a plurality of channels. The honeycomb structure is formed by at least one at least partially structured metallic layer which forms connecting points that fix the honeycomb structure in place. A cross section of the honeycomb structure has radial zones with the connecting points. At least 1% and no more than 20% of inner contact points of the at least one at least partially structured metallic layer in the cross section form a connecting point in at least one zone. The connecting points have lengths in a structure direction being different in at least two radial zones.

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: A honeycomb body includes at least one housing and metal foils forming a channel structure. The channel structure is fastened to the housing by a multiplicity of linear brazed connections. A production method for providing the linear brazed connections between the channel structure and the housing and an exhaust gas treatment component having the honeycomb body in an exhaust system of a motor vehicle, are also provided.