Engine having sound absorption structures on the outer sides of

Details Engine having sound absorption structures on the outer sides of Engine having sound absorption structures on the outer sides of

1996-07-03

1998-04-14

McMahon, Marguerite

Internal-combustion engines

Particular piston and enclosing cylinder construction

123668, F02B 7711

Patent

active

057380619

ABSTRACT:
The present invention relates to a sound absorption structure-carrying engine provided on the outer sides of combustion chambers with sound absorption layers adapted to shut off the pressure waves occurring in the combustion chambers. In this engine, combustion chamber members are provided in the cavities in a cylinder head via sound absorption gaskets. The pistons moved reciprocatingly in the cylinders comprise piston heads, piston skirts, and sound absorption gaskets provided between the piston heads and piston skirts. The sound absorption gaskets comprise sound absorption layers formed out of a rubber material, such as synthetic rubber of a high heat conductivity capable of minimizing the transmission of vibration and a metallic material. In a heat insulating structure-carrying engine, heat insulating layers preventing the radiation of heat are provided between the combustion chambers and sound absorption layers. The heat insulating layers comprise ceramic fiber of a low heat conductivity and vacuum layers.

REFERENCES:
patent: 3081754 (1963-03-01), Georges
patent: 3996913 (1976-12-01), Hamparian
patent: 4523554 (1985-06-01), Ryu
patent: 4524732 (1985-06-01), Dworak et al.
patent: 4715178 (1987-12-01), Tsukuda et al.
patent: 4774926 (1988-10-01), Adams
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patent: 5080081 (1992-01-01), Kawamura
patent: 5282411 (1994-02-01), Hirai et al.
Patent Abstracts of Japan, JP62013758, Jan. 22, 1987.

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