An iterative method of solving the hydrodynamic equations of lubrication of a piston ring is described. Some results of the calculations are compared with the measured values of the oil-film thickness in an actual engine. It is shown that there are disagreements of up to a factor of 8 between the theoretical and measured values. Further experiments were carried out on a single ring in a motored rig and here it was shown that although the film thickness is considerably greater, it is still not in complete agreement with the theory.
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References
1.
LloydT.‘The hydrodynamic lubrication of piston rings’, Proc. Instn mech. Engrs1968–69183 (Pt 3P), 28–34.
2.
ArchardJ. F.‘The temperature of rubbing surfaces’, Wear19592, 438–55.
3.
HirstW.MooreA. J.‘Non-Newtonian behaviour in elastohydrodynamic lubrication’, Proc. R. Soc. Series A 1974337, 101–21.
4.
HamiltonG. M.RobertsonW. G.‘Lubrication of rollers with oils containing polymers’, Proc. Instn mech. Engrs1966–67181 (Pt 3O), 192–9.
5.
GreeneA. B.‘Initial visual studies of piston-cylinder dynamic oil film behaviour’, Wear196913, 345–60.
6.
PacherneggS. J.‘The hydraulics of oil scraping’, SAE National Combined Fuel and Lubricants Meeting, October 1971. Proceeding 71 08 16.
7.
LewisM. G.‘A miniature mutual-inductive proximity transducer’, J. Physics E, 19747, 269–271.
8.
De F. BarrosA.DysonA.‘Piston ring friction—rig measurements with low viscosity oils’, J. Inst. Petr, Jan 196046, 1.
9.
TingL. L.MayerJ. E.Jr.‘Piston ring lubrication and cylinder bore wear analysis, part I—theory’, J. Lubr. Technol.197496F (2) 258–266.
10.
TingL. L.MayerJ. E.Jr.‘Piston ring lubrication and cylinder bore wear analysis, part II—Theory verification’, J. Lubr. Technol.197496F (3) 305–314.
11.
BakerA. J. S.DowsonD.StrachanP.‘Dynamic operating factors in piston rings’, Int. Symp. Marine Engng., Japan, 1972, paper 2–5, 59–68.
12.
SreenathA. V.VenkateshS.‘Analysis and computation of the oil film thickness between the piston ring and cylinder liner of an internal combustion engine’, Int. J. mech. Sci.197315, 605–611 (A similar paper ‘Piston ring lubrication in i.e. engine’ by these authors was presented at the 1st World Conf. Industrial Tribology, New Delhi, India, 1972).
13.
DykesP. de K.Proc. Instn mech. Engrs1957171 (11), 413–26.
