Abstract: An exhaust gas system includes a collector for joining exhaust gas flows from two or more cylinders of a combustion engine. The collector has an outlet cross-section behind which a tubular jacket is disposed. A honeycomb body is disposed in the tubular jacket. A space through which a flow is to take place is defined between the outlet cross-section and the honeycomb body. At least one guide surface is disposed in the space for diverting at least a part of the exhaust gas flows. A method is provided for applying exhaust gas flows to a honeycomb body. The flows arrive at the honeycomb body at least partly from different directions. The exhaust gas flows are diverted by at least a first guide surface, before they impinge upon the honeycomb body, in such a way that they flow in a direction at least partly opposite to that of the exhaust gas flows, and their incidence upon the honeycomb body is thus delayed.

Abstract: A catalytic converter assembly for an exhaust gas system of an internal combustion engine, in particular for a small engine. The catalytic converter assembly has a housing and a catalytic converter formed of at most two layers formed of sheets disposed in the housing. The catalytic converter has an at least partially curved elongated body and at least one structured sheet with a structuring and a catalytically active material. The at least one structured sheet is wound on inclinedly around the elongated body and at least partially bears against the housing. The structuring of the at least one structured sheet in addition with one of the housing and a sheet of a layer of the at most two layers define closed passages there-between through which exhaust gases can flow and such that, as considered over the cross-section of the housing, a cross-sectional area bordered in by the closed passages constitutes at least half of a total of the cross-sectional area of the housing.

Abstract: A sheathed conductor configuration for corrosive environmental conditions is disclosed. The sheathed conductor configuration has at least one internal electrical conductor that is electrically insulated from a metallic outer sheath by an electrically insulating material. The outer sheath is formed of steel that has subsequently been enriched with aluminum by diffusion.

Abstract: A catalytic converter for a small engine and a method for manufacturing the same include a honeycomb body coated with catalytically active material and made from at least partly structured layers of sheet metal with channels for the passage of exhaust gas. In order to reduce manufacturing costs, the honeycomb body is placed in a silencer housing disposed in the proximity of the engine, in such a way that at least a predominant portion of exhaust gas of the small engine has to flow through the honeycomb body. The honeycomb body is a layered, wound or folded stack of sheet metal layers, which is squeezed into the silencer housing, plastically deforming at least 10% and preferably 20 to 30% of the channels, so that it completely fills at least a partial volume of the housing.

Abstract: A combustion engine assembly includes a combustion engine with a displacement and a downstream catalytic converter for cleaning exhaust gas. The catalytic converter has a geometric surface and an effectiveness for converting at least one harmful component in the exhaust gas into harmless components. The catalytic converter has at least one honeycomb body, all of which together have a total volume. The volume is selected in such a way that it is smaller than the displacement by a factor of 0.6. However, the geometric surface is dimensioned in such a way that the catalytic converter has an effectiveness of more than 98%. The honeycomb body is preferably a metallic honeycomb body formed of layered and/or wound and at least partly structured sheet metal layers. Channels of the honeycomb body are separated from one another by channel walls. An average thickness of the channel walls is at most 40 micrometers, preferably at most 35 micrometers and in particular between 18 and 32 micrometers.

Abstract: An extruded honeycomb body, in particular a catalytic converter carrier body, having a plurality of passages through which a fluid can flow and of which at least a portion is bordered and/or separated from each other with passage walls of a first thickness and at least a portion is bordered and/or separated from each other with passage walls of a second thickness. The first thickness is less than the second thickness and the honeycomb body has a wall structure which stabilizes it and which is formed with passage walls of the second thickness. The stabilizing wall structure has a plurality of approximately straight wall portions of the second thickness which, transversely with respect to the local configuration of the edge of the honeycomb body, extend from a respective outside into the interior of the honeycomb body or extend through the honeycomb body.

Abstract: A particle filter of metal foil has walls defining fluid flow channels with inlets and outlets. A first channel has an open entry cross section at a first end side extended partway into the first channel. A second channel has an open exit cross section substantially corresponding to the entry cross section. One of the walls of the first channel has filter passage perforations leading to the second channel. A closure in the first channel, opposite the entry cross section, toward a second end side, closes off the first channel to the fluid. A process for producing a particle filter from metal foil includes pulling the metal foil from an endless storage device. A joining element or strip is applied to the metal foil. The metal foil is shaped into subsequent channels. The metal foil is wound or stacked to form first and second channels in opposite directions. The first channel has an open entry cross section at the first end side extending partway into the first channel.

Abstract: A catalytic converter configuration for exhaust gas systems of motor vehicles includes a housing surrounding at least two substantially successively disposed catalyst carrier bodies each having axial channels with normal cross-sectional areas. The first catalyst carrier body has at least two or more through-flow apertures running parallel to the axial channels and having second cross-sectional areas substantially larger than the first cross-sectional areas. A device and a method are provided for manufacturing a catalyst carrier body, in particular the first catalyst carrier body, from at least one stack of a multiplicity of at least partly structured sheet metal layers forming a multiplicity of channels through which a fluid can flow. A fork-like twisting device is rotatable about a central axis, engages each stack and is substantially surrounded by a mold. Active winding spindles are disposed on a carrier of the twisting device.

Abstract: A method for applying brazing material to metal structures is used, in particular, for honeycomb bodies of exhaust gas catalytic converters. The brazing material is applied in the form of a powder and is firmly held to the metal structures through the use of an adhesive material acting as a bonding agent, binder or adhesion promoter. The adhesive material that is used to firmly hold the brazing powder assumes two different states with respect to its adhesive action during the production process of the metal structure. A first state is less adhesive and a second state is more strongly adhesive. The adhesive strength can be selected or adjusted as a function of external conditions, especially temperature. Therefore, at a given time the adhesive material can be put into a state which is suitable for each production step, as a result of which the brazing material quality is increased and the production process is simplified.

Abstract: An exhaust gas system includes a collector for joining exhaust gas flows from two or more cylinders of a combustion engine. The collector has an outlet cross-section behind which a tubular jacket is disposed. A honeycomb body is disposed in the tubular jacket. A space through which a flow is to take place is defined between the outlet cross-section and the honeycomb body. At least one guide surface is disposed in the space for diverting at least a part of the exhaust gas flows. A method is provided for applying exhaust gas flows to a honeycomb body. The flows arrive at the honeycomb body at least partly from different directions. The exhaust gas flows are diverted by at least a first guide surface, before they impinge upon the honeycomb body, in such a way that they flow in a direction at least partly opposite to that of the exhaust gas flows, and their incidence upon the honeycomb body is thus delayed.

Abstract: A method and a configuration are provided for cleaning exhaust gas in an exhaust gas system flowing from a gasoline engine. An air/fuel mixture is preferably supplied to the gasoline engine by direct injection. In order to provide improved cleaning, the exhaust gas flows successively in the exhaust gas system through at least one honeycomb body with a catalytically active coating, preferably a three-way coating, and a particle filter with a coating storing at least one pollutant component, in particular hydrocarbon, carbon monoxide and/or nitrogen oxide, at least from time to time. In addition to collecting soot particles, in particular the particle filter advantageously carries out supplementary oxidation of residual hydrocarbons as well as carbon monoxide during a cold start phase, and supplementary reduction of residual nitrogen oxides when the gasoline engine is operated under load.

Abstract: A honeycomb body configuration includes a metal housing accommodating a honeycomb body having a plurality of channels separated from one another by dividing walls. The honeycomb body has varying radial strength along its periphery. A compensation layer is disposed at least in partial regions of the periphery between the housing and the honeycomb body. The compensation layer has at least two support sections in the peripheral direction of the honeycomb body which exert greater forces in the radial direction upon the honeycomb body than outside the support sections in remaining peripheral regions. The support sections are disposed in regions where the honeycomb body has greater radial strength. Steps can be taken to produce the support sections on the compensation layer, by using support segments on the housing and/or beads on the honeycomb body, in each case in the peripheral regions of greater strength.

Abstract: A metal foil includes at least two intersecting structures, which are spaced from an imaginary reference surface and which define an intersection region. The at least two intersecting structures partially superpose one another in the intersection region and are formed with at least one through opening in the intersection region. A honeycomb body includes at least one flat construction formed with channels, which define a flow direction for a fluid to flow through the channels. The at least one flat construction has at least two intersecting structures, which are spaced from an imaginary reference surface and which define an intersection region. The at least two intersecting structures partially superpose one another in the intersection region and have at least one through opening in the intersection region.

Abstract: In a device for the catalytic conversion of exhaust gases in an exhaust system, in particular an exhaust system of a combustion engine, and a process for manufacturing the same, a catalyst carrier body is provided with a multiplicity of channels through which an exhaust gas can flow. At least a part of a free flow cross-section of the channels is closed in an exhaust gas flow direction by plastic deformation of channel walls in an outer annular region of the catalyst carrier body. The plastic deformation can be carried out with a tool. The tool has a disk rotatable about an axle. The disk is pressed with force against the catalyst carrier body and the jacket so that a plastic deformation of the jacket tube and the channel walls occurs. A circumferential bead directed towards the carrier body is produced. Other techniques for plastic deformation are possible.

Abstract: A honeycomb body is produced in which metal sheets are stacked and/or wound in a layered configuration. The metal sheets are suitably structured so as to form passages through which a fluid can flow. At least a part of the sheet layers initially comprises a laminate material with a layer of chromium-containing steel and a layer primarily formed of aluminum. The laminate is substantially homogenized by diffusion to a stratified sheet in a subsequent heat treatment. The honeycomb body is assembled with at least a part of the sheet layers provided a structure which increases the degree of elasticity of the honeycomb body and/or the pressure in relation to surface area of the contact locations prior to and in the heat treatment. The honeycomb body is fitted into a tubular casing with such a prestressing that in the heat treatment the contact locations between the sheet layers remain in contact.

Abstract: A conical honeycomb body includes a tubular casing which is conical with respect to an axis. At least one stack in the casing is formed of at least one layer at least partially having waves. The layers bound a plurality of channels through which a fluid can flow. Structures extending substantially in axial direction of the honeycomb body project from the waves of the layers.

Abstract: A sheet metal layer of a layer-like configuration with rolled-on brazing material and a process for producing a honeycomb body by stacking and/or winding sheet metal layers made of a layered material. At least a part of sheet metal layers for honeycomb bodies have a structure forming channels through which a fluid can flow. At least part of the sheet metal layers is formed initially of a layered material with at least one layer of chromium-containing steel and at least one mainly aluminum-containing layer, that are homogenized to a large extent during a subsequent heat treatment. The layered material is provided with at least one additional layer made of brazing material when it is produced by rolling, so that during a subsequent heat treatment at least parts of contact locations between the sheet metal layers are joined by brazing.

Abstract: A process for the production of a brazed honeycomb body with sheets having a layer-like configuration, includes stacking and/or winding sheet metal layers at least partially having a structure for forming passages through which a fluid can flow. At least a portion of the sheet metal layers is initially formed of a layered material having at least one layer of chromium-containing steel and at least one substantially aluminum-containing layer. The aluminum-containing layer is substantially homogenized in a later heat treatment and the heat treatment is effected firstly under a vacuum or in a reducing and then an oxidizing atmosphere. The heat treatment is part of a brazing procedure in which contact locations between the sheet metal layers are brazed together at least in partial regions by the addition of brazing material.

Abstract: A honeycomb body, in particular a catalytic converter carrier body, with stacked and/or wound sheet layers of which at least a portion are structured sheet layers, thus forming passages through which a fluid can flow. A portion of the sheet layers is of a first thickness and a portion of the sheet layers is of a second thickness which is greater than the first thickness. The honeycomb body contains in its interior a lattice-like structure that is formed from at least two sheet layers of the second thickness, of which at least one is a structured sheet layer and which at least in a location-wise manner are connected together by a procedure involving the intimate joining of materials. Honeycomb bodies according to the invention, while affording good stability, can have particularly thin sheet layers whereby at least locally they have a particularly low thermal capacity.

Abstract: A honeycomb body that including wound sheet-metal layers including structured sheet-metal layers with structuring. The wound sheet-metal layers form an upper side, a lower side disposed remote from the upper side, a first edge region and a second edge region laterally extending from the upper side to the lower side. The second edge region is disposed remote from the first edge region. The wound sheet-metal layers are fixed in a common fixing zone at the first edge region. The structuring of the structured sheet-metal layers is at least partially flattened at the fixing zone so that adjacent wound sheet-metal layers lie close against each other at the common fixing zone. The wound sheet-metal layers preferably form a region with a flattened cross-sectional area. A muffler of an exhaust gas system of an internal combustion engine that includes the honeycomb body is also provided. In addition, a two-region housing that includes the honeycomb body is provided.