Piston head for an internal combustion engine and a compression ring therefor

Patent · Tue Mar 28 04:00:00 EST 1989

OSTI ID:6058392

Thornton, T E

A reciprocating piston for mounting within a cylinder of an internal combustion engine is described, the piston comprising a piston head having an endface forming a wall of a combustion chamber when the piston assumes a predetermined relative position within the cylinder and an annular groove formed in a peripheral surface of the piston head and spaced from the endface. The peripheral surface is adapted to substantially conform to but being spaced inwardly from a wall defining the cylinder; and a compression ring is adjustably mounted within the groove; the groove being spaced a predetermined axial distance from the endface and being provided with spaced inwardly extending side walls. A recessed inner wall defines the depth of the groove; the compression ring having an inner section disposed within the groove with an axial dimension less than the spacing between the groove side walls and an outer section protruding from the groove for sliding sealing engagement with the cylinder wall. The ring inner section is provided with an inner surface and opposite side surfaces, the latter being spaced from the groove side walls, each ring inner section side surface having a first segment extending inwardly from the ring outer section and being in substantially parallel relation with an adjacent groove side wall, and a second segment extending inwardly from the first segment and angularly away from the adjacent groove side wall and terminating at the ring inner surface.

• Assignee: Combustion Technologies, Inc., Columbus, IN
• Patent Number(s): US 4815429
• OSTI ID: 6058392
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
COMPRESSION
CYLINDERS
DESIGN
ENGINES
HEAT ENGINES
INTERNAL COMBUSTION ENGINES
PISTONS
RINGS