Title:
シリンダとピストンリングとの組み合わせ
Document Type and Number:
Japanese Patent JP6962998
Kind Code:
B2
Abstract:
A combination of a cylinder and a piston ring with which the amount of wear of a hard carbon coating forming an outer peripheral surface of the piston ring is reduced according to the hardness of an inner peripheral surface of the cylinder, regardless of a material to be applied to the inner peripheral surface of the cylinder, is provided. The present disclosure is a combination of a cylinder and a piston ring, the combination including a cylinder of an internal combustion engine and a piston ring sliding on an inner peripheral surface of the cylinder. The piston ring has an outer peripheral surface sliding on the inner peripheral surface of the cylinder, and the outer peripheral surface is formed of a substantially hydrogen-free amorphous carbon coating. The Vickers hardness Hd of the amorphous carbon coating and the Vickers hardness Hb of the inner peripheral surface of the cylinder satisfy Hd + Hb ≤ 2500 HV. The ratio ID/IG of the peak intensity of the D band to the peak intensity of the G band in a Raman spectrum obtained by measuring the amorphous carbon coating by Raman spectroscopy is 0.60 or more and 1.33 or less.
Inventors:
Shoro Shinohara
Application Number:
JP2019227759A
Publication Date:
November 05, 2021
Filing Date:
December 17, 2019
Export Citation:
Assignee:
Riken Co., Ltd.
International Classes:
F02F5/00; F02F1/00; F16J9/26
Domestic Patent References:
| JP6533858B1 | ||||
| JP200410923A | ||||
| JP2007162099A | ||||
| JP711375A |
Foreign References:
| WO2009069703A1 | ||||
| US20190093769 |
Attorney, Agent or Firm:
Kenji Sugimura
Mitsutsugu Sugimura
Keisuke Kawahara
Mitsutsugu Sugimura
Keisuke Kawahara