The minimum oil-film thickness in the front main bearing of a 3.8 L, V-6 engine was measured at 3 000 r/min, and 140 N·m using an electrical resistance technique. For a series of seven Newtonian, single-grade oils, film thickness correlated with oil viscosity measured either in a kinematic or in a high-shear-rate viscometer. For a series of fifteen polymer-containing, non-Newtonian, multigrade oils, however, no single measure of viscosity adequately correlated with film thickness for all of the oils. By eliminating four multigrade oils from the combined single and multigrade data sets, it was possible to correlate film thickness to the viscosity (of the remaining multigrade and Newtonian oils) measured at 150°C and 5 × 105 s−1, conditions which are believed to be representative of temperatures and shear rates in bearing oil films. Possible explanations for the lack of correlation with the entire set of twenty-two oils are discussed.
Measuring the Effect of Oil Viscosity on Oil Film Thickness in Engine Journal Bearings
Sae Technical Papers
1983 SAE International Fall Fuels and Lubricants Meeting and Exhibition ; 1983
1983-10-31
Aufsatz (Konferenz)
Englisch
Measuring the Effect of Oil Viscosity on Oil Film Thickness in Engine Journal Bearings
Kraftfahrwesen | 1983
|A Correlation Between Engine Oil Rheology and Oil Film Thickness in Engine Journal Bearings
SAE Technical Papers | 1986
|A Correlation Between Engine Oil Rheology and Oil Film Thickness in Engine Journal Bearings
Kraftfahrwesen | 1986
|Experimental Investigation of Oil Film Thickness for Hydrodynamic Journal Bearings
British Library Conference Proceedings | 2012
|Relationship Between Oil Film Thickness and Wear of Journal Bearings
SAE Technical Papers | 1970
|