Title:
ピストンリングおよびエンジン
Document Type and Number:
Japanese Patent JP6604557
Kind Code:
B2
Abstract:
A piston ring in which carbon films with film qualities optimized to be adapted to required performance are formed on an outer circumferential sliding surface and top and bottom surfaces thereof with good productivity is provided, and a high-performance engine which employs the piston ring is also provided. In the piston ring, a carbon film is formed on an outer circumferential sliding surface and top and bottom surfaces. The carbon film contains a stacking of at least two types of carbon film layers with different film qualities, and a thickness ratio of the two types of carbon film layers is different between the outer circumferential sliding surface and the top and bottom surfaces.
Inventors:
Takehiko Oshiro
Koji Miyake
Masanori Tsujioka
Satoshi Yoshida
Koji Miyake
Masanori Tsujioka
Satoshi Yoshida
Application Number:
JP2017534064A
Publication Date:
November 13, 2019
Filing Date:
August 10, 2015
Export Citation:
Assignee:
Japan ITF Co., Ltd.
Honda motor industry stock company
Honda motor industry stock company
International Classes:
F16J9/26; F02F5/00
Domestic Patent References:
| JP2011133018A | ||||
| JP2014149085A | ||||
| JP2000120869A | ||||
| JP2000120870A | ||||
| JP5013445B2 | ||||
| JP3355306B2 | ||||
| JP2008241032A |
Foreign References:
| WO2015115601A1 | ||||
| WO2012073717A1 |
Attorney, Agent or Firm:
Tetsuji Kamidai
Naomi Kamino
Satoshi Shimizu
Naomi Kamino
Satoshi Shimizu