Title:
INTERNAL COMBUSTION ENGINE COMPRESSION RING
Document Type and Number:
Japanese Patent JP2015218905
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an internal combustion engine compression ring capable of ensuring the suppression of the adhesion of oil sludge to the compression ring as compared with a conventional technique.SOLUTION: If it is assumed that a dispersion component, a polarity component, and a hydrogen bond component constituting surface free energy (per unit area (mJ/m)) at 80°C in at least part of a base material surface constituting an outer side surface of a compression ring (except for PTFE) are δ, δ, and δ, respectively, and that a dispersion component, a polarity component, and a hydrogen bond component constituting surface free energy (per unit area (mJ/m)) of engine oil at 80°C are δ, δ, and δ(δ=38.9,δ=13.6,δ=0.0), respectively, ε defined by the following equation is not less than 8.
Inventors:
ICHIKAWA TAKAYUKI
Application Number:
JP2015116963A
Publication Date:
December 07, 2015
Filing Date:
June 09, 2015
Export Citation:
Assignee:
RIKEN KK
International Classes:
F16J9/26; F02F5/00
Domestic Patent References:
| JP2012107710A | 2012-06-07 | |||
| JP2009289411A | 2009-12-10 |
Foreign References:
| WO2012111826A1 | 2012-08-23 |
Attorney, Agent or Firm:
Kenji Sugimura
Keisuke Kawahara
Keisuke Kawahara
Previous Patent: PRE-COMPRESSION DEVICE FOR ROTATIONALLY GUIDED ROLLER SCREW MECHANISM
Next Patent: THERMOMAGNETIC CYCLE DEVICE
Next Patent: THERMOMAGNETIC CYCLE DEVICE