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AssigneeTenneco Automotive Operating Company Inc.
InventorsRuth Ann Latham, William V. Alcini, Michael A. Golin, Michael Joseph Torzewski, Steven A. Freis, Mark Ernest Kluesner, Gabriel S. Salanta, Stephen Joe Myers
Estimating the term…
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.
A method of manufacturing an exhaust gas treatment device, the method comprising 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 layer and the inner layer but does not create an airtight seal, wherein during the step of placing the loose-fill insulation the method further comprises compacting the loose-fill insulation resulting in a density of the loose-fill insulation that is greater than a bulk density for the loose-fill material, and wherein the exhaust gas treatment device is configured to pass air through the volume of space between the inner layer and the outer layer by applying a pressure produced by a moving vehicle.
Dependencies are inferred from the claim text.