Engine with internal sound attenuation barrier

Internal-combustion engines – Accessories – Covers – trays – vibrators – corrosion inhibitors – air filters


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123191B, 123 4183, 92144, F01B 3108




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.

patent: 1529812 (1925-03-01), Reinek
patent: 1940677 (1933-12-01), Dymock
patent: 2683638 (1954-07-01), Noble
patent: 2736300 (1956-02-01), Flynn
patent: 2881751 (1959-04-01), Bodine
patent: 2951472 (1960-09-01), Skubic
patent: 3173407 (1965-03-01), Sampietro


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