Abstract:
A process produces structures which are superimposed on one another in a metal foil section. The process includes producing a primary structure using a first tool, and transferring the metal foil section to a second tool, the second tool having at least one shaping profiled roller which is responsible for transferring the metal foil section. A secondary structure is produced using the second tool. A spatial position of the primary structure and the secondary structure is determined in at least one subregion of the metal foil section. An incorrect position is detected and an operating parameter of the at least one profiled roller is adapted in dependence on the detected incorrect position. An apparatus is suitable for this process and produces metal foils which are suitable for the production of catalyst support bodies that can be used in exhaust systems of internal combustion engines.
Abstract:
An exhaust gas system for converting harmful substances of an exhaust gas of a mobile internal combustion engine includes at least one reducing agent feed, a catalytic converter, a filter element and an exhaust pipe. The reducing agent feed opens into the exhaust pipe upstream of the filter element, while the catalytic converter is disposed downstream of the filter element, as seen in exhaust gas flow direction. Additional components, such as a mixer, a pre-catalytic converter and a heating element, etc. used for purifying exhaust gas, may also be advantageously integrated into the system.
Abstract:
An exhaust gas filter for cleaning an exhaust gas of an internal combustion engine includes at least one strip-shaped filter layer made of a material through which a fluid can at least partly flow. The filter layer has a length in a longitudinal direction and a width in a transverse direction. The filter layer has a metallic reinforcing region at least in a partial region. The metallic reinforcing region has a width and a length. The width of the reinforcing region is less than the width of the filter layer and/or the length of the reinforcing region is less than the length of the filter layer. A method for producing a filter layer for an exhaust gas filter is also provided.
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 honeycomb body has sheet-metal layers and sheet-metal foils to be joined with brazing powder. Each of the foils has at least one sliding structure enabling the adjacent layers to slide over one another. A honeycomb body, particularly a catalyst carrier body for an exhaust system of an internal combustion engine, includes at least partially structured sheet-metal layers wound and/or stacked to form passages for fluid flow. The sheet-metal layers are at least partially joined to one another by the brazing powder. The honeycomb body also has at least one sheet-metal foil with at least one sliding structure. A process for producing the honeycomb body guarantees sharply delineated brazed joints, even for brazing powder, which results in a greatly increased lifespan, particularly with regard to thermal and dynamic loads placed on the honeycomb body when used as a catalyst carrier body in an exhaust system of an internal combustion engine.
Abstract:
A method for producing multiple structured sheet metal foils includes the steps of A) reshaping the sheet metal foil to produce a primary structure having a first primary structure width; B) reshaping the sheet metal foil having the primary structure to produce a secondary structure; and C) reshaping the structured sheet metal foil to produce a second primary structure width being smaller than the first primary structure width. A method for producing a metal honeycomb body, a catalyst carrier body having multiple structured sheet metal foils for exhaust gas purification and a tool for producing multiple structured sheet metal foils, are also provided.
Abstract:
An exhaust gas system for converting harmful substances of an exhaust gas of a mobile internal combustion engine includes at least one reducing agent feed, a catalytic converter, a filter element and an exhaust pipe. The reducing agent feed opens into the exhaust pipe upstream of the filter element, while the catalytic converter is disposed downstream of the filter element, as seen in exhaust gas flow direction. Additional components, such as a mixer, a pre-catalytic converter and a heating element, etc. used for purifying exhaust gas, may also be advantageously integrated into the system.
Abstract:
A device is configured to catalytically reduce internal combustion engine exhaust gases which contain nitrogen oxides. The device has an exhaust pipe, one end of which can be connected to at least one exhaust outlet of the internal combustion engine. A reducing agent, in particular urea, is introduced into the exhaust pipe with a feed device. At least one mixer is arranged downstream of the reducing agent injection, as seen in the flow direction of the exhaust gas. The mixer has a multiplicity of passages through which the fluid can flow. At least one catalytic converter is arranged downstream of the mixer. At least one diffuser is located between the mixer and the converter. The diffuser which has a multiplicity of passages through which the exhaust gas can flow and which have a cross section which increases in the flow direction.