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Engine with internal sound attenuation barrier

Old 09-16-2009, 03:16 AM
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Join Date: Sep 2009
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Default Engine with internal sound attenuation barrier

An internal combustion engine of the type having so-called free standing cylinders or cylinder liners surrounded by an open topped coolant cavity is provided with internal sound attenuation barrier means, preferably mounted in the coolant cavity on the inner surfaces of the cylinder block walls or on the outer walls of the cylinders. The barrier means preferably comprises a rigid sheet engagable with the mounting wall and supporting a resilient sound absorbent material bonded or otherwise retained on one surface thereof. In a preferred embodiment the barrier material is a laminated steel having two spaced steel sheets bonded together by a rubber or rubber-like material encapsulated between the two sheets and formable into the desired shape of sound attentuating sleeve or barrier.

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Last edited by JimBlake; 09-16-2009 at 07:52 AM. Reason: SPAM links
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