Hemispherical piston combustion chamber apparatus

Details Hemispherical piston combustion chamber apparatus Hemispherical piston combustion chamber apparatus

1996-09-04

1998-03-17

Okonsky, David A.

Internal-combustion engines

Combustion chamber

Combustion chamber shape is a figure of revolution

1231936, F02B 5900, F02B 7502

Patent

active

057275351

ABSTRACT:
In an internal combustion engine, a piston/cylinder arrangement includes a hemispherical combustion chamber formed either in a piston crown secured to a top of the piston or in the piston head itself. This hemispherical combustion chamber occupies substantially an entirety of the surface area of the upper face of the piston crown or piston. A cylinder head extension member extends downwardly into the hemispherical combustion chamber so as to occupy a volume thereof as necessary to increase the compression ratio to a desired value. When the hemispherical combustion chamber is formed in the piston crown, the piston crown is secured to but spaced apart from the piston head so as to insulate the piston crown from the piston head. This enables the piston crown to be formed of superior grade metal relative to the piston head.

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