Tenneco Automotive Operating Company Inc.

Other

Steven A Freis

Ruth Ann Latham

Stephen Joe Myers

William Victor Alcini

Michael A Golin

Gabriel S Salanta

Mark Kluesner

Michael Joseph Torzewski

An exhaust gas treatment device, which includes an outer layer, an inner layer that is at least in part disposed within the outer layer, and a loose-fill insulation disposed in the volume between the outer layer and the inner layer, where a piece of fiber mat is disposed between the outer layer and the inner layer and forms a barrier that at least partially prevents the loss of the loose-fill insulation from the volume between the outer layer and the inner layer and a manufacturing method that includes placing a loose-fill insulation into the volume of space between an inner layer and an outer layer and positioning a piece of fiber mat between the outer layer and the inner layer to form a barrier that at least partially prevents the loss of the loose-fill insulation from the volume of space between the outer and inner layers.

Loose-fill insulation exhaust gas treatment device and methods of manufacturing

A method is provided for producing an exhaust gas aftertreatment or acoustic device () having a maximum operating temperature T. The method includes the steps of providing a blanket () of silica fiber or alumina insulation material having a weight percentage of SiOor AlOof greater than 65%; calcining the insulating material by heating the blanket () so that all of silica fiber insulation material is raised to a temperature T greater than T; and securing the blanket () on the device () after the calcining step. The blanket is encapsulated in a covering prior to the securing step, and before or after the calcining step, with the covering between the blanket and the device being a selected one of foil, wire mesh, or siliconized fiber glass.

Method of producing an insulated exhaust device

A method is provided for installing a multi-layer mat () in an exhaust gas aftertreatment or acoustic device. The method includes the steps of wrapping the mat () around an inner surface of the device along the same plane for at least a complete wrap around the inner surface; subsequently wrapping the mat () around the already completed wrap such that each of the successive wraps of the mat () are offset a constant distance from the plane of the previous wrap; a final wrap of the mat () wherein the mat is wrapped along a final plane for at least a complete wrap around the catalyst; and installing the mat () in the device () after the wrapping steps.

Method of installing a longitudinally offset multi-layer mat in an exhaust gas aftertreatment or acoustic device

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Ann Arbor, MI, United States of America

Steven A Freis