PRESSURE RING ATTACHMENT PISTON

PROBLEM TO BE SOLVED: To reduce oil consumption by easily separating a pressure ring from a ring groove surface in a pressure ring attachment piston.SOLUTION: A pressure ring attachment piston 18 comprises: a top ring 34 as a first pressure ring arranged to be movable in a piston movement direction...

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Bibliographische Detailangaben
Hauptverfasser:	INAGAKI HIDETO, KATSUMI NORIKAZU, NOZAWA MIGI, YAMADA TOMOHISA
Format:	Patent
Sprache:	eng
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 oil consumption by easily separating a pressure ring from a ring groove surface in a pressure ring attachment piston.SOLUTION: A pressure ring attachment piston 18 comprises: a top ring 34 as a first pressure ring arranged to be movable in a piston movement direction in a first ring groove 40; and a second ring 36 as a second pressure ring arranged to be movable in the piston movement direction in a second ring groove 42. At least one of a first end surface in an axial direction of the top ring 34, a first ring groove surface of the first ring groove 40 opposed to the first end surface, a second end surface in the axial direction of the second ring 36, and a second ring groove surface of the second ring groove 42 opposed to the second end surface is an oppositely formed surface, and the oppositely formed surface has a recession or a protrusion in a dimension larger than the maximum depth of the surface roughness.