Abstract:
Exhaust gas catalyst support body, especially of spirally wound or stacked thin corrugated and/or essentially smooth sheets of high temperature-resistant steel, where the contact points of the sheets are connected by a joining technique, characterized by the feature that the structural material has a high aluminum content at least in partial regions and/or in the proximity of the surface and/or the joint connections.
Abstract:
A mounting assembly for an exhaust gas catalyst includes a metallic exhaust gas catalyst carrier body and a tubular jacket in which the catalyst carrier body is disposed. The catalyst carrier body is fastened to the tubular jacket while permitting lengthwise expansion of the catalyst carrier body, through the use of beads encircling at least part of the catalyst carrier body and corresponding formations formed in the tubular jacket into which the beads protrude in the form of slots and keys. The catalyst carrier body and the beads are disposed at axial and radial distances from the tubular jacket and the formations.
Abstract:
A metal catalyst carrier body assembly and a method of producing the same includes a metal catalyst carrier body having a given length, two end surfaces and a honeycomb structure formed of textured metal sheets through which gas can flow. A jacket tube surrounds the honeycomb structure and is shorter than the given length. At least a portion of the end surfaces is brazed. The jacket tube has ends each being disposed at a distance from a respective one of the end surfaces being greater than the brazed portion.
Abstract:
A method of producing a honeycomb body including a stack of structured metal sheets disposed in layers at least partially spaced apart from each other defining a multiplicity of channels through which gases can flow, the stack having ends twisted in mutually opposite directions about at least two fixation points, and a jacket tube surrounding the sheets and being formed of at least one segment, the sheets having ends joined with the jacket tube.
Abstract:
A honeycomb body and a method of producing the body including a stack of structured metal sheets disposed in layers at least partially spaced apart from each other defining a multiplicity of channels through which gases can flow, the stack having ends twisted in mutually opposite directions about at least two fixation points, and a jacket tube surrounding the sheets and being formed of at least one segment, the sheets having ends joined with the jacket tube.
Abstract:
A metal catalyst carrier or support body is rolled or laminated from two alternating layers of sheet metal of different structure, wherein the sheet-metal layer, at least in some areas relative to one another, have double or multiple-wave structure, in that one of the layers has a wave structure including at least two superimposed or alternating waves of different wavelength and/or amplitude and/or both layers have wave structures of different wavelength and/or amplitude, by means of which in both cases the number of contact points between the two layers is reduced and the elasticity of the resultant structure is increased, wherein none of the wavelengths is considerably smaller than the wavelenth having the greatest amplitude.
Abstract:
A method for selectively applying brazing to a catalyst carrier body includes alternately winding smooth and wavy layers of sheet metal into a catalyst carrier body having outer surfaces, dividing at least one of the outer surfaces into regions to be brazed covering a portion of the at least one outer surface as seen in circumferential and radial directions, and applying brazing to the regions and a catalyst carrier assembly for carrying out the method.
Abstract:
Metallic exhaust gas catalyst carrier body, includes high temperature-resistant steel sheets forming a multiplicity of cells permeable to exhaust gas in a given exhaust gas direction, the steel sheets having slits formed therein substantially transverse to the given exhaust gas direction, the slits, in unused state of the carrier body, being of such quantity and size that for every cross section of each of the steel sheets in the given exhaust gas direction substantially between 5% and 30% of the cross section is devoid of steel due to the presence of the slits.
Abstract:
A method of producing a metallic exhaust gas catalyst carrier body includes winding alternating layers of smooth and corrugated sheetmetal strips to form a blank and inserting the blank into a jacket tube, each winding of the blank being formed of a respective smooth and corrugated sheetmetal strip each having an individually predeterminable length; determining the length of each winding in accordance with the length necessary for filling a predetermined jacket tube cross section, fixing each winding beforehand to at least one side of the blank, so as to produce an approximately egg-shaped blank which is tightly wound on the one side and wound with varying looseness in the remaining region thereof; inserting the blank into the jacket tube in such a manner that the tightly wound side is located in a region of the jacket tube cross section in which a largest possible inscribed circle of the jacket tube cross section engages the jacket tube, and a device for carrying out the method, a carrier body formed by the method and device, and a blank forming part of the carrier body.