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A Test Procedure for Evaluating Temporary-Shear Loss of Engine Lubricants
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Abstract
Temporary shear loss characteristics of multigraded engine oils were measured in a newly developed engine oil pump rig. Correlations of the results with high pressure capillary viscometry data indicate that the test apparatus generates shear rates in the range of 2-3 × 105 s-1. One advantage of this technique over similar mechanical approaches is that the test rig causes virtually no permanent shear degradation. Test results are reported for a variety of polymer types, and the relationship of permanent and temporary shear losses is discussed.
Authors
Citation
Stambaugh, R. and Kopko, R., "A Test Procedure for Evaluating Temporary-Shear Loss of Engine Lubricants," SAE Technical Paper 750379, 1975, https://doi.org/10.4271/750379.Also In
References
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