Damped heat shield

Details Damped heat shield Damped heat shield

1994-06-13

1997-01-07

Hart, Douglas

Power plants

Internal combustion engine with treatment or handling of...

Common receiver having inlets from plural cylinder

60272, 60299, 181240, 181263, F01N 710

Patent

active

055905242

ABSTRACT:
A damped heat shield for a high temperature portion of a vehicle exhaust system. The heat shield has inner and outer metal layers of substantially different thicknesses and substantially different resonant frequencies, which causes the shield to damp vibrational energy and reduce radiated sound energy and noise. Between the metal layers is a layer of sound and heat shielding material such as aluminum foil or ceramic fiber paper. The metal layers are preferably stainless steel, cold rolled steel, aluminized steel, aluminum-clad steel, or aluminum. If cold rolled steel is used, the exterior of the shield is preferably coated with a corrosion-resistant coating.

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Fiberfrax Ceramic Fiber Paper brochure, The Carborundum Company, (1990), pp. 1-3.

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