Carl Irving - Romulus MI, US Joseph Michael Lanzesira - Monroe MI, US Chris Darr - Northwood OH, US Houliang Li - Novi MI, US Darren Nance - Brighton MI, US
A catalytic converter and method for its assembly including an external shell formed in two halves containing a catalytic substrate, two internal shields and two-piece inlet and outlet cones. The inlet and outlet cones are attached as halves to each side of the external shell, and are assembled to each other as the external shells are assembled.
Method Of Spin Forming Oblique End Cones Of A Catalytic Converter
The present invention is generally directed towards a catalytic converter installed in the motor vehicles. More specifically to a method of forming the end portion of the catalytic converter using the spinform technique. The catalytic converter defines a central axis and is rotated around the central axis. At least one roller is placed perpendicular to the central axis. The roller moves in a transverse direction with respect to the central axis such that the axis of the end portion is at an angle with respect to the central axis.
Spin-Forming Method For Making Catalytic Converter
Houliang Li - Novi MI, US Joseph Lanzesira - Monroe MI, US Earl Nelson - Livonia MI, US
International Classification:
B21D051/16
US Classification:
029/890000
Abstract:
A method is provided for forming a catalytic converter comprising a catalyst substrate having a noncircular circumference and a metal housing disposed about the substrate. The catalyst substrate is initially measured to determine the radial dimension of the substrate circumference relative to a central axis. The substrate is wrapped in a compressible mat and arranged within a metal tube. The arrangement is subjected to a spin-forming process that forms the metal tube about the catalyst substrate. The spin-forming process includes rotating the metal tube about the substrate axis, while concurrently urging a metal-forming tool against the metal tube. The metal-forming tool is programmed to follow a metal-forming path corresponding to the substrate circumference plus a predetermined radial distance. In this manner, a metal housing is formed having a noncircular circumference corresponding in shape to the catalyst substrate and spaced apart by a uniform insulative layer.
Houliang Li - Novi MI, US Joseph Lanzesira - Monroe MI, US Earl Nelson - Livonia MI, US
International Classification:
B01D053/34
US Classification:
422/179000, 422/177000, 422/180000
Abstract:
A catalytic converter for an automotive exhaust system or the like comprises a catalyst substrate disposed within a seamless metal housing preferably formed by a spin-forming process. The housing includes a midsection surrounding a catalyst substrate and an end section that extends from the midsection and defines an opening, which may be either an inlet or an outlet for the converter. An inner heat shield is affixed to the housing end section at the opening and includes a frustoconical section that is disposed about the substrate such that the substrate end is received in the frustoconical section. The frustoconical section is spaced apart from the first housing end section to insulate the housing end section from the heat of the exhaust gases and thereby reduces the temperature of the metal housing.