Title:
PISTON RING
Document Type and Number:
WIPO Patent Application WO/2024/069774
Kind Code:
A1
Abstract:
This piston ring is used in an internal combustion engine that uses a hydrogen gas fuel. The piston ring satisfies 0.75 ≤ FPS, when: the flexural index of the piston ring found when same is subjected to a flexural test under a prescribed condition is noted as FP1; the post-corrosion flexural index of the piston ring found when same is subjected to the flexural test after a corrosion test is performed in which the piston ring is immersed in a 1% nitric acid aqueous solution for 30 minutes is noted as FP2; and the flexural strength sustained ratio FPS of the piston ring is defined as FPS = FP2/FP1.
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Inventors:
AOKI TAKASHI (JP)
NAGAKURA HIROYUKI (JP)
OOURA SHINSUKE (JP)
KAWAI KIYOYUKI (JP)
YONEYAMA OSAMU (JP)
NAGAKURA HIROYUKI (JP)
OOURA SHINSUKE (JP)
KAWAI KIYOYUKI (JP)
YONEYAMA OSAMU (JP)
Application Number:
PCT/JP2022/036046
Publication Date:
April 04, 2024
Filing Date:
September 28, 2022
Export Citation:
Assignee:
TPR CO LTD (JP)
International Classes:
F02F5/00; F16J9/26
Foreign References:
| JPS51137004U | 1976-11-05 | |||
| JPH10130771A | 1998-05-19 | |||
| JPH10121210A | 1998-05-12 | |||
| JPS5181203A | 1976-07-16 | |||
| JP2006070298A | 2006-03-16 | |||
| US6062569A | 2000-05-16 |
Attorney, Agent or Firm:
IP FIRM SHUWA (JP)
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