Catalytic converter, especially for motor vehicles, and method for the production thereof
First Claim
1. A method for producing a catalytic converter, comprising:
- wrapping a mineral fiber positioning mat around a monolith packet to form a monolith packing;
radially prestressing the mineral fiber mat;
pressing in a pressing-in direction the at least one monolith packing into a tube section forming a positioning area, the tube section being utilized to increase restoring forces exerted by the mineral fiber mat onto the monolith, the positioning area comprising at least two longitudinal sections that extend parallel to a longitudinal axis of the tube section, wherein at least two of the longitudinal sections have different internal cross-sectional area such that the longitudinal sections decrease in cross-sectional area in the pressing-in direction and the monolith packing is pressed in starting from a tube end having a larger cross-sectional area.
2 Assignments
0 Petitions
Accused Products
Abstract
The invention relates to a catalytic converter, especially for motor vehicles, and to a method for the production thereof. The inventive method is characterized in that a monolithic packet (17) consisting of at least one monolith (1) with wrap-around supporting matting (7) is pressed into a tube section (2) acting as a housing. The tube section (2) has two longitudinal sections (9, 10) with different inner cross-sectional surfaces. The monolithic packet (17) is pressed inwards from the end (21) of the tube section with the bigger or biggest inner cross-sectional surface. The inventive catalytic converter is characterized in that it has at least one contracted longitudinal section (9) with a reduced diameter (12) or reduced inner cross-sectional surface, whereby the inner surface (5a) of the tube section (2) runs parallel to the central longitudinal axis (32) thereof.
23 Citations
19 Claims
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1. A method for producing a catalytic converter, comprising:
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wrapping a mineral fiber positioning mat around a monolith packet to form a monolith packing;
radially prestressing the mineral fiber mat;
pressing in a pressing-in direction the at least one monolith packing into a tube section forming a positioning area, the tube section being utilized to increase restoring forces exerted by the mineral fiber mat onto the monolith, the positioning area comprising at least two longitudinal sections that extend parallel to a longitudinal axis of the tube section, wherein at least two of the longitudinal sections have different internal cross-sectional area such that the longitudinal sections decrease in cross-sectional area in the pressing-in direction and the monolith packing is pressed in starting from a tube end having a larger cross-sectional area. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A catalytic converter, comprising:
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a housing comprising a tube section forming a positioning area, an inflow funnel and an outflow funnel, the positioning area comprising at least two longitudinal sections that extend parallel to a longitudinal axis of the tube section, wherein a first of the longitudinal sections extends away from a first end of the tube section and is followed by a second of the longitudinal sections having a reduced cross-sectional area;
at least one monolith arranged in the positioning region;
a mineral-fiber mat with radial pre-stressing; and
a gap space arranged between a peripheral surface of the monolith and an internal surface of the housing and accommodating the mineral-fiber mat with radial pre-stressing. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification