A capacity gauge has been designed for operating in the conditions of a working engine. The method of using it for determining the oil-film thickness and piston-ring profile is described. Oil-film thicknesses in the range 0·4-2·5 μm between the piston rings and the cylinder liner have been observed. Their variation with speed, load and temperature has been measured and it is concluded that their behaviour is essentially hydrodynamic.
Get full access to this article
View all access options for this article.
References
1.
CastlemanR. A.‘A hydrodynamical theory of piston ring lubrication’, Physics19367, 364–7.
2.
EilonS.SaundersO. A.‘A study of piston ring lubrication’, Proc. Instn mech. Engrs1957171, 427–43.
3.
NealeM. J.‘Piston ring scuffing—a broad survey of problems and practice’, Proc. Instn mech. Engrs1970–71185 (Pt 1), 21–32, D3–17.
4.
WingR. D.SaundersO. A.‘Oil film temperature and thickness measurements on the piston rings of a diesel engine’, Proc. Instn mech. Engrs1972186, 1–9, D1–9.
5.
MccallionH.LloydT.LargeJ.‘The formation of piston ring profiles’, Tribology Convention, 1972, 55–61 (Institution of Mechanical Engineers, London).
