Laboratory Methods for Predicting the Viscosity Loss of Polymer Thickened Hydraulic Fluids 680438

The viscosity stability of automatic transmission fluids as measured by the sonic oscillator failed to correlate with that determined in continuous high speed driving. The development of a test based on the use of a power steering pump is described. The effects of motor speed, oil pressure, and oil temperature were determined. Test conditions are described which permit prediction of used oil viscosities for transmission fluids. This test is independent of the chemical class of the V.I. improver.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.