Title:
PISTON RING AND PISTON DEVICE
Document Type and Number:
WIPO Patent Application WO/2011/071049
Kind Code:
A1
Abstract:
Provided is a piston ring which can retain, over a long period, the excellent effect of preventing aluminum adhesion in a high-power engine.
At least one of the upper and lower surfaces of a piston ring is coated with a polyimide coating in which hard particles have been dispersed. As the hard particles, use is made of alumina, zirconia, silicon carbide, silicon nitride, cubic boron nitride, diamond, or the like. The hard particles have an average particle diameter of 0.01-5 µm, and the coating has a thickness of 2-30 µm.
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Inventors:
SASAKI HAYATO (JP)
ONO TAKASHI (JP)
ONO TAKASHI (JP)
Application Number:
PCT/JP2010/071931
Publication Date:
June 16, 2011
Filing Date:
December 07, 2010
Export Citation:
Assignee:
RIKEN KK (JP)
SASAKI HAYATO (JP)
ONO TAKASHI (JP)
SASAKI HAYATO (JP)
ONO TAKASHI (JP)
International Classes:
F16J9/26; F02F5/00
Domestic Patent References:
| WO2007099968A1 | 2007-09-07 |
Foreign References:
| JP2001031906A | 2001-02-06 | |||
| JP2008128482A | 2008-06-05 | |||
| JP2008248986A | 2008-10-16 | |||
| JP2006022666A | 2006-01-26 | |||
| JPS63170546A | 1988-07-14 | |||
| JPS62233458A | 1987-10-13 | |||
| JP4151379B2 | 2008-09-17 |
Other References:
See also references of EP 2511575A4
Attorney, Agent or Firm:
ARIMA MOMOKO (JP)
Arima 100 children (JP)
Arima 100 children (JP)
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