A method for producing a honeycomb body for a catalytic converter for treating exhaust gases, the honeycomb body having a plurality of flow ducts, through which gas flows from an inlet end to an outlet end. The honeycomb body is formed from a plurality of metal layers lying one on top of the other. The honeycomb body is produced by forming corrugated sections in a metal strip, wherein the corrugated sections follow one another directly or are spaced apart by smooth sections, creating a pre-bend of the metal strip in the end region of each section, folding the individual sections of the metal strip onto one another to create a layer stack, wherein the individual sections are alternately folded onto one another in opposite directions, inserting the layer stack in a housing, and joining the layer stack to the housing in contact regions between the layer stack and the housing.

An electrically conductive connection between at least two electrically conductive stacks of at least partially structured, metal foils which form a large number of channels through which a fluid may flow, comprising at least one electrically conductive rod element which passes through the at least two stacks, wherein a spacer element is arranged on the at least one rod element and between the at least two stacks, the two stacks being arranged at a distance from one another by the spacer element; wherein an arrangement comprising the at least two stacks, the at least one rod element and the spacer element is clamped by at least one clamping element.

Provided are metal foil matrices formed of corrugated metal foil with oblique angles. The metal foil matrices are capable of providing turbulent gas flow there through. The matrices may contain a catalytic coating. The matrices may be employed in a catalytic converter for treatment of exhaust gas emissions of an internal combustion engine.

Described herein are catalytic converter substrates or cores based on triply periodic minimal surfaces (TPMS) geometries, along with methods of making and using the same.

A honeycomb body includes at least one housing and a honeycomb structure with a plurality of channels. The honeycomb structure is formed from at least one at least partially structured metallic layer which forms connecting points fixing the honeycomb structure. A cross section of the honeycomb structure has radial zones with differing densities of the connecting points. In at least one zone, at least 1% and at most 20% of inner contact points in the cross section also form a connecting point. An exhaust-gas purification unit and a motor vehicle are also provided.

An electrically conductive connection between at least two electrically conductive stacks of at least partially structured, metal foils which form a large number of channels through which a fluid may flow, comprising at least one electrically conductive rod element which passes through the at least two stacks, wherein a spacer element is arranged on the at least one rod element and between the at least two stacks, the two stacks being arranged at a distance from one another by the spacer element; wherein an arrangement comprising the at least two stacks, the at least one rod element and the spacer element is clamped by at least one clamping element.

A honeycomb body for a catalyst for aftertreatment of exhaust gas of an internal combustion engine, formed of a plurality of metal foils, which are stacked one on top of the other to form a layer stack and wound about at least one point of rotation. At least some metal foils have an at least partial structuring, by which flow channels are formed between the individual layers, through which flow channels gas can flow in a main flow direction from a gas inlet side of the honeycomb body to a gas outlet side. The honeycomb body is formed of two sub-portions over which the flow channels extend substantially without interruption, the sub-portions are positioned at an angle of at least 45 degrees relative to one another.

A honeycomb body for the aftertreatment of exhaust gases from an internal combustion engine formed from a plurality of metal foils which are stacked on one another to form a layer stack and are wound around at least one center of rotation. The layer stack is formed alternatingly from smooth and at least partially structured metal foils, the metal foils have a foil width and a foil length. The width of the foils runs along the main throughflow direction of the honeycomb body from a gas inlet side to a gas outlet side, and the foil length runs transversely to this direction, wherein at least some metal foils have at least some slots which divide the respective metal foil into a plurality of segments.

An electrically heatable honeycomb body assembly includes an electrical connection of sheet metal layers at a connection pin. A honeycomb body has a metal casing with an inner periphery, through which the connection pin is led in a bushing and electrically insulated. The sheet metal layers are alternately coarsely structured and finely structured or smooth sheets together forming a stack with uppermost and lowermost layers and channels for an axial gas flow between the layers. The connection pin runs radially approximately perpendicular to the layers and is metallically connected to at least two or all of the layers through at least one intermediate piece. The uppermost sheet metal layer preferably runs approximately parallel to the metal casing over at least 35% of the inner periphery and is separated therefrom only by an air gap. Simple production of an operationally safe and very uniformly electrically heatable honeycomb body is provided.

A catalytic support for catalysis processes including a main body, at least one conduit made in said main body, said conduit having an inlet portion made on a first surface of said main body and an outlet portion made on a second surface of said main body, said first surface being opposite said second surface said main body includes a plurality of layers at least partially superposed and mutually adherent, said layers forming a plurality of recesses at the intersections and superposition of said layers, said recesses being configured to house particles of at least one catalyst element.