Oil ring

An oil ring, capable of reducing sliding friction even in a high speed revolution region of a piston, and capable of reducing the consumption of oil, has a substantially I-shaped cross-section with two rails (2, 3) connected at a columnar portion thereof. Each of the two rails (2, 3) has a sliding p...

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Bibliographic Details
Main Authors HITOSUGI, HIDESHI, NANNO, KEISHI, SHIBATA, SHIRO, ABE, TOMOAKI
Format Patent
LanguageEnglish
French
German
Published 11.11.2009
Subjects
ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
BLASTING
COMBUSTION ENGINES
CYLINDERS
CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
LIGHTING
MECHANICAL ENGINEERING
PISTONS
SEALINGS
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:An oil ring, capable of reducing sliding friction even in a high speed revolution region of a piston, and capable of reducing the consumption of oil, has a substantially I-shaped cross-section with two rails (2, 3) connected at a columnar portion thereof. Each of the two rails (2, 3) has a sliding projection (5) which has an outer portion defining an outer side surface (7), an inner portion defining an inner side surface (8), and a sliding surface (6) formed on a tip end of the sliding projection (5) sliding on an inner wall of the cylinder. At least a portion from an outer edge portion (10), where the outer side surface (7) and the sliding surface (6) are joined to each other, is formed into a curved surface. The sliding surface (6) also has a curved surface sliding portion (11) which is joined to the outer side surface (7) and is formed into a gently curved surface.
Bibliography:Application Number: EP20070011122