Wear resistant cylinder barrel surface for supporting a piston

Details Wear resistant cylinder barrel surface for supporting a piston Wear resistant cylinder barrel surface for supporting a piston

1999-02-16

2000-03-28

McMahon, Marguerite

Internal-combustion engines

Particular piston and enclosing cylinder construction

Cylinder detail

F02F 120

Patent

active

060417498

ABSTRACT:
In a cylinder with a cylinder surface receiving a piston the cylinder surface has at least two zones with different oil retention capabilities; sectors having a relatively high oil retention capability are disposed in areas of the cylinder surface which are subjected to relatively high radial pressure forces while the other areas have only a relatively low oil retention capability. The oil retention sectors have a width which changes over their axial length so as to provide only a surface area with increased oil retention capability as needed to accommodate high radial pressure forces of the piston while the rest of the cylinder surface has a low oil retention capability to eliminate unnecessary oil consumption and engine emissions.

REFERENCES:
patent: 3657078 (1972-04-01), Schweikher
patent: 3749072 (1973-07-01), Schweikher
patent: 3808955 (1974-05-01), Hamada et al.
patent: 4706417 (1987-11-01), Gary

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