OIL RING

PROBLEM TO BE SOLVED: To reduce a friction resistance without deteriorating an oil control function in an oil ring.SOLUTION: An oil ring 13 is received in an oil ring groove 8 which is recessed in the outer peripheral surface of a piston 4. The oil ring has an upper side rail 16, a lower side rail 1...

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Bibliographische Detailangaben
Hauptverfasser:	KAWASE NAOKAZU, NAKAGAWA HAJIME
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	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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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To reduce a friction resistance without deteriorating an oil control function in an oil ring.SOLUTION: An oil ring 13 is received in an oil ring groove 8 which is recessed in the outer peripheral surface of a piston 4. The oil ring has an upper side rail 16, a lower side rail 17, which are formed in an annular plate shape, and an expander 18 arranged between the upper side rail and the lower side rail. The outer peripheral surface 16E of the upper side rail is formed in an inclined surface which has a first inclination angle θ1 and is inclined upward and radially inward. The outer peripheral surface 17E of the lower side rail is formed in an inclined surface which has a second inclination angle θ2 smaller than the first inclination angle and is inclined upward and radially inward.SELECTED DRAWING: Figure 2 【課題】オイルリングにおいて、オイル制御機能を損なうことなく、摩擦抵抗を低減させる。【解決手段】ピストン４の外周面に凹設されたオイルリング溝８に受容されるオイルリング１３であって、板状の環形に形成された上サイドレール１６及び下サイドレール１７と、上サイドレール及び下サイドレールの間に配置されたエキスパンダ１８とを有し、上サイドレールの外周面１６Ｅは、第１傾斜角θ１を有して上方に向けて径方向内方に傾斜する傾斜面に形成され、下サイドレールの外周面１７Ｅは、第１傾斜角よりも小さい第２傾斜角θ２を有して上方に向けて径方向内方に傾斜する傾斜面に形成されていることを特徴とする。【選択図】図２