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Oil Film Thickness in a Bearing of a Fired Engine Part III: The Effects of Lubricant Rheology
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Abstract
This is the third interim report describing oil film thickness measurements in a bearing of a fired single cylinder engine.
The minimum oil film thickness (MOFT) in the front main crankshaft bearing of a fired CLR (Cooperative Lubricants Research) engine has been measured using a capacitance technique.
The effects of base stock viscosity, VI improver type and concentration, and finished oil viscosity at both high and low shear rates are presented and discussed. Five VI improvers are compared, and are found to have varying degrees of effectiveness in increasing MOFT in a given formulation and base stock. The shear rate and temperature of the viscosity measurement are found to affect the overall correlation between MOFT and oil viscosity.
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Girshick, F. and Craig, R., "Oil Film Thickness in a Bearing of a Fired Engine Part III: The Effects of Lubricant Rheology," SAE Technical Paper 831691, 1983, https://doi.org/10.4271/831691.Also In
References
- American Society for Testing and Materials 1983 Book of ASTM Standards Philadelphia, PA 1983
- Craig, R. C. King, W. H. Appeldoorn, J. K. “Oil Film Thickness in a Bearing of a Fired Engine, Part II: The Bearing as a Capacitor” SAE paper 821250 October 1982
- King, W. H. U.S. Patent Application 434945 October 1982
- Tukey, J. W. “Comparing Individual Means in the Analysis of Variance” Biometrics 5 99 114 1949
- American Society for Testing and Materials 1983 Book of ASTM Standards Philadelphia, PA 1983