Internal-combustion engines – Particular piston and enclosing cylinder construction – Piston
Patent
1998-07-16
2000-06-13
McMahon, Marguerite
Internal-combustion engines
Particular piston and enclosing cylinder construction
Piston
F16J 100, F02F 300
Patent
active
06073602&
ABSTRACT:
A piston comprises a ring land extending to a crown, a pin boss formed in a lower side of the ring land, a piston pin bore formed in the pin boss and a skirt section extending to the ring land. The skirt section is formed in such a manner that an area of a thrust side skirt is greater than an area of a counter-thrust side skirt. The thrust side skirt is formed so as to become thinner in wall thickness in a portion closer to the ring land and a portion farther from the ring land than in a central portion on both sides of a middle position along circumferential direction around a piston center line substantially perpendicular to an axis line of the piston pin bore and a wall thickness of a portion between the closer portion and the central portion and a wall thickness of a portion between the central portion and the farther portion vary gradually. The thrust side skirt is formed so as to become gradually thinner in wall thickness from a portion closer to the ring land to a portion farther from the ring land on both sides of the middle portion along the circumferential direction around the piston center line substantially perpendicular to the axis line of the piston pin bore.
REFERENCES:
patent: 4683808 (1987-08-01), Wacker et al.
patent: 4694735 (1987-09-01), Tatematsu et al.
patent: 5054375 (1991-10-01), Kawabata et al.
patent: 5063893 (1991-11-01), Iwaya
patent: 5299490 (1994-04-01), Harrer et al.
patent: 5857440 (1999-01-01), O'Dowd et al.
patent: 5894824 (1999-04-01), Watanabe et al.
McMahon Marguerite
Unisia Jecs Corporation
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