Internal combustion engine with a horizontal cylinder

Details Internal combustion engine with a horizontal cylinder Internal combustion engine with a horizontal cylinder

1998-03-03

1999-12-07

Kwon, John

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

277445, 277457, F02F 100

Patent

active

059965452

ABSTRACT:
In order to prevent penetration of lubricant into the combustion chamber, a piston for an internal combustion engine has a labyrinthine pressure equalizing passage between the combustion chamber and the crankcase. For this purpose, the piston ring closest to the combustion chamber is guided with relatively large axial play in the matching annular groove. The piston rings located farther from the combustion chamber are each provided with recesses that connect the annular chamber between the adjacent piston rings with the bottom of the respective annular groove. A bore is also provided in the annular groove that is farthest from the combustion chamber, the bore connecting the bottom of the annular groove with an interior chamber defined in the piston. In this way, the pressure can equalize between the combustion chamber and the crankcase.

REFERENCES:
patent: 3336844 (1967-08-01), Cornet
patent: 3831952 (1974-08-01), Geffroy
patent: 4856417 (1989-08-01), Ishikawa
patent: 5203294 (1993-04-01), Takemura et al.
patent: 5476076 (1995-12-01), Zhou
patent: 5655433 (1997-08-01), Santi
Ing. E. Strasser: "Kolbengestaltung Fuehr Niedrigen Olverbrauch", May 17, 1979, pp. 1-11.
P. DE K. Dykes, "Pressure-Packed Piston Rings", The Motor Industry Research Association, Brentford, Middlesex; Dec. 1, 1951, pp. 1-22.

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