PRESSURE RING

PROBLEM TO BE SOLVED: To provide a pressure ring whose upper and lower surfaces are changed into flat surfaces substantially perpendicular to a piston shaft during fitting of the pressure ring to a piston when the pressure ring is fitted to a piston ring groove, which suppresses an increase in the a...

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Bibliographic Details
Main Authors SHIBATA SHIRO, MIYAMOTO MAMORU
Format Patent
LanguageEnglish
Published 27.10.2011
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:PROBLEM TO BE SOLVED: To provide a pressure ring whose upper and lower surfaces are changed into flat surfaces substantially perpendicular to a piston shaft during fitting of the pressure ring to a piston when the pressure ring is fitted to a piston ring groove, which suppresses an increase in the amount of blowby gas and oil consumption, and also suppresses an increase in manufacturing cost.SOLUTION: A stepped cutout portion is formed by cutting out a corner formed by a lower surface having an axial cross-sectional surface formed into a substantially rectangular shape and a peripheral surface. The pressure ring has the upper surface formed into the shape of a substantially coned disc spring inclined downward toward a radially outward direction in a free state. The inclination angle θ of the upper surface of the pressure ring, with respect to a surface perpendicular to the shaft of the pressure ring, is set to be 0°<θ≤2°.
Bibliography:Application Number: JP20100083458