Abstract:
A metal sheet having a microstructure relieved of notching, a carrier body having a plurality of sheets, and an exhaust system having the carrier body, are distinguished by a particularly long useful life in an automobile. Moreover, it is possible to bring about flow profiles coordinated exactly with the respective fields of use, so that a particularly efficient or extremely adaptable carrier body for purifying the exhaust gas of automobiles is provided.
Abstract:
A process for producing a structure in a smooth sheet-metal strip includes multiple process steps. In a first step, a first section of a smooth sheet-metal strip is fed to a first tool and a second section of the sheet-metal strip is fed to a second tool in a direction of advance. Then the sheet-metal strip is stopped. A sheet-metal machining of the first section of the sheet-metal strip is carried out using the first tool. A sheet-metal machining of the second section of the sheet-metal strip is carried out using the second tool, with the first feeding step being carried out simultaneously. An apparatus is provided for producing a sheet-metal strip of such a complex structure, which produces the structure with a very high degree of accuracy even when the materials properties differ.
Abstract:
A method for manufacturing an exhaust gas treatment component having at least one structured piece of sheet metal, includes shaping the at least one piece of sheet metal with at least one fluid stream. A device for producing a structured piece of sheet metal is also provided.
Abstract:
A method for producing metal fibers includes a machining production method using at least one rotating tool. A device for producing metal fibers, a filter material having such fibers, a method for producing the material, a particle filter using such material, a motor vehicle equipped with the filter, and a fiber, are also provided.
Abstract:
A honeycomb body includes a housing and a plurality of layers with a curved profile and a predetermined length. Each layer includes at least one at least partially structured metal foil forming a multiplicity of passages with a passage cross section. A majority of the layers have different lengths than one another. A process for producing a honeycomb body, a process for treating exhaust gas, and an exhaust gas assembly, are also provided.
Abstract:
A housing for a honeycomb body includes a jacket tube with an inner wall surface. The jacket tube has a passivation layer in at least one section of the inner wall surface in order to deliberately modify a connection to the honeycomb body by joining. A method for the production of a catalyst carrier body with a honeycomb body and a housing according to the invention are also indicated. A catalyst carrier body produced in this way reduces thermal stresses between the honeycomb body and the jacket tube and, in particular, ensures a reliable brazing process during production, even in a vacuum.
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 delivering a reducing agent, in particular a liquid urea-water solution, includes at least two of the following elements: a storage device (e.g. a tank), a delivery device (e.g. a pump), a deflecting device (e.g. a valve), a detecting device (e.g. a sensor), a separating device (e.g. a filter) and an outlet device (e.g. a nozzle, injector), which are interconnected by a line device. At least one element is pressure-sensitive and the adjacent line device near the pressure-sensitive element forms at least one heat sink. A device having a targeted freezing behavior is thus provided, allowing pressure-sensitive elements to be protected. A method for producing a motor vehicle is also provided.
Abstract:
A method for operating a tank for reducing agent, in particular aqueous urea solution, having a sensor with a first electrical contact and a second electrical contact, includes initially determining a conductance value for liquid reducing agent, a conductance value for frozen reducing agent and a conductance value for air in steps a.1) to a.3. A voltage is then applied between the first electrical contact and the second electrical contact in step b. A conductance value between the first electrical contact and the second electrical contact is then determined in step c. The conductance value determined in step c) is then compared to the conductance values determined in steps a.1) to a.3) and a determination is made as to if liquid reducing agent, frozen reducing agent, or air is present in step d). A motor vehicle in which the method is carried out, is also provided.
Abstract:
A method for operating a reducing agent delivery device having a liquid reducing agent tank, an injector dispensing reducing agent into an exhaust treatment device, an internal combustion engine and a reducing agent line from tank to injector, includes conveying the reducing agent from tank to injector with a pump and providing a pressure sensor in the line. The method includes, repeatedly: determining and providing supply pressure for the injector in the delivery device with the pump, calculating an injector opening time from a determined injection volume and supply pressure and opening the injector at the calculated injector opening time. A venting procedure at a point in time includes: determining an increase of a pressure conveying volume characteristic in the delivery device, calculating an air bubble volume by comparing the increase to a target increase, and conveying a conveying volume through the injector. A motor vehicle is also provided.