Title:
PISTON RING
Document Type and Number:
WIPO Patent Application WO/2016/002810
Kind Code:
A1
Abstract:
Provided is a piston ring (10) in which a sliding surface (11) is covered with a Cr-B-V-N alloy film (3), wherein the B content is in a range of 0.1-1.5 mass%, the V content is in a range of 0.05-1 mass%, the ratio [B content / V content] is in a range greater than 1 and 30 or less, and the piston ring has greater wear resistance, cracking resistance, and peeling resistance. This alloy film (3) also preferably contains Ti, the Ti content being in a range greater than 0 mass% and 8 mass% or less. This piston ring (10) is preferably mounted in an engine that uses an alcohol fuel or an alcohol-containing fuel.
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Inventors:
CHIDA NORIAKI (JP)
OKANO MASATAKA (JP)
OKANO MASATAKA (JP)
Application Number:
PCT/JP2015/068896
Publication Date:
January 07, 2016
Filing Date:
June 30, 2015
Export Citation:
Assignee:
NIPPON PISTON RING CO LTD (JP)
International Classes:
F16J9/26; F02F5/00
Foreign References:
| JP2008286354A | 2008-11-27 | |||
| JP2000001767A | 2000-01-07 |
Other References:
See also references of EP 3163130A4
Attorney, Agent or Firm:
YOSHIMURA, SHUNICHI (JP)
Toshikazu Yoshimura (JP)
Toshikazu Yoshimura (JP)
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