OIL RING FOR INTERNAL COMBUSTION ENGINE

WIPO Patent Application WO/2011/043364

A1

Disclosed is an oil ring for an internal combustion engine, which does not undergo the adhesion or deposition of an oil sludge and does not cause the adhesion between constituent members of an engine when the engine is driven for a long period and can exhibit an excellent oil control function for a prolonged period. At least a part of the surface of an oil ring for an internal combustion engine is covered with a metal coating film having a surface free energy of 40 mJ/m2 or less and a hydrogen bonding force of 1.0 mJ/m2 or less. As the metal coating film, a metal coating film containing Ni or Cu or an alloy coating film containing Ni or Cu is used.

JP5669392	Steel containing high silicon components for the manufacture of piston rings and cylinder liners
JPH064138	[Name of device] Piston ring

GAO YUNZHI (JP)
TAKAHASHI JUNICHI (JP)
MURAMATSU GYO (JP)
OBARA RYO (JP)
MIYASHITA TETSUJI (JP)
WATANABE TADAHIKO (JP)

PCT/JP2010/067521

April 14, 2011

October 06, 2010

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RIKEN KK (JP)
GAO YUNZHI (JP)
TAKAHASHI JUNICHI (JP)
MURAMATSU GYO (JP)
OBARA RYO (JP)
MIYASHITA TETSUJI (JP)
WATANABE TADAHIKO (JP)

F02F5/00; F16J9/06; F16J9/26

JPH0942451A	1997-02-14
JP2008057478A	2008-03-13

ARIMA MOMOKO (JP)
Arima 100 children (JP)

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