Combination of cylinder and piston ring

• Main Author: SHINOHARA AKIO
• Format: Patent
• Language: Chinese; English
• Published: 27.05.2022
• 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

The invention provides a combination of a cylinder and a piston ring, which can reduce the wear amount of a hard carbon film forming the outer peripheral surface of the piston ring according to the hardness of the material irrespective of the material applied to the inner peripheral surface of the cylinder. The present disclosure is a combination of a cylinder and a piston ring having a cylinder of an internal combustion engine and a piston ring sliding on the inner peripheral surface of the cylinder, the combination being characterized in that: the outer peripheral surface of the piston ring sliding on the inner peripheral surface of the cylinder is formed of an amorphous carbon coating film that does not substantially contain hydrogen; the Vickers hardness (Hd) of the amorphous carbon coating film and the Vickers hardness (Hb) of the inner peripheral surface of the cylinder satisfy Hd + Hb < = 2500 HV, and the ratio ID/IG of the peak intensity of the D band to the peak intensity of the G band in a Raman spe