Engine piston

Details Engine piston Engine piston

1998-02-23

1999-05-25

McMahon, Marguerite

Internal-combustion engines

Particular piston and enclosing cylinder construction

Piston

F16J 116

Patent

active

059061820

ABSTRACT:
The present invention relates to a piston for an internal combustion engine. The piston includes a crown defined by a combustion surface and a cylindrical ring belt. The cylindrical ring belt has a first and a second ring groove extending about the circumference thereof, where the ring grooves are adapted to receive a first and a second piston ring. The combustion surface and the first ring groove define a first ring land therebetween. The first ring groove and the second ring groove define a second ring land therebetween. The cylindrical ring belt also has an elastic groove extending about the circumference thereof. The elastic groove has an upper wall and a lower wall interconnected by a radius "R", where the upper wall and the lower wall pivot about the radius "R", under loading of the piston to lower stress concentration within the crown.

REFERENCES:
patent: 5144884 (1992-09-01), Kelly
patent: 5261363 (1993-11-01), Kemnitz
patent: 5323744 (1994-06-01), Kusama et al.
patent: 5601010 (1997-02-01), Sawada et al.
patent: 5746169 (1998-05-01), Isslet et al.

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