DEVELOPMENT OF A LABORATORY TECHNIQUE FOR DEFINING MECHANICAL SHEAR STABILITIES OF MULTI-GRADE ENGINE OILS

A program was initiated to define the mechanical shear stability of polymer-thickened lubricating oils in terms of a laboratory bench-scale technique. In subsequent evaluation studies using standard laboratory-type paint blending/mixing devices, a 'kinetic dispersion mill' was found to ind...

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Bibliographic Details
Main Authors: LePera,Maurice E, Pigliacampi,Jules
Format: Report
Language:English
Subjects:
AUTOMOTIVE ENGINEERING
DEGRADATION
DISPERSERS(AGITATORS)
EVALUATION
FEASIBILITY STUDIES
INTERNAL COMBUSTION ENGINES
LABORATORY EQUIPMENT
LUBRICANT ADDITIVES
LUBRICANTS
Lubricants and Hydraulic Fluids
LUBRICATING OILS
MULTIGRADE LUBRICATING OILS
PERFORMANCE(ENGINEERING)
PHYSICAL PROPERTIES
POLYMERS
Reciprocating and Rotating Engines
SHEAR PROPERTIES
SHEAR STRESSES
STABILITY
TEST EQUIPMENT
Test Facilities, Equipment and Methods
TEST METHODS
THICKENERS(MATERIALS)
VISCOSITY
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Summary:A program was initiated to define the mechanical shear stability of polymer-thickened lubricating oils in terms of a laboratory bench-scale technique. In subsequent evaluation studies using standard laboratory-type paint blending/mixing devices, a 'kinetic dispersion mill' was found to induce shear degradation of polymer thickeners in multi-grade engine oils. Further refinement of this technique led to the establishing of a satisfactory correlation with single and multicylinder engine tests. (Author)