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One of the challenges in lubricant development is to adequately model performance across a broad range of potential lubrication and wear regimes that are encountered in use. Since wear in a given application is dependent on both rolling and sliding speeds, it is desirable to determine lubricant performance as a function of these variables. The use of a new test machine and methodology permits the construction of performance maps which define the transitions between lubrication regimes - hydrodynamic/elastohydrodynamic (EHD), EHD/mixed film and mixed film/boundary. This paper describes a method of mapping out the performance of a lubricant over a range of rolling and sliding velocities. Lubrication and wear performance is characterized for an ester base reference fluid (Herco-A) and two commercially available gear oils based on a petroleum oil and a poly(alpha olefin).

This new book provides a comprehensive overview of various lubrication aspects of a typical powertrain system including the engine, transmission, driveline, chassis, and other components. The manual addresses major issues and current development status of automotive lubricant test methods. Topics also cover advanced lubrication and tribochemistry of the powertrain system, such as diesel fuel lubrication, specialized automotive lubricant testing development, filtration testing of automotive lubricants, lubrication of constant velocity joints, and biodegradable automotive lubricants.

This well-referenced handbook is comprehensive, in-depth, and provides a detailed overview of ALL of the important ASTM and non-ASTM fuels and lubricants test procedures. Readers will get a thorough overview of the application-related properties being tested and an extensive discussion of the principles behind the tests and their relationship to the properties themselves. A must-have for anyone in the industry involved in the formulation, use, and specification of fuels and lubricants. The information is subdivided into four sections: Petroleum Refining Processes for Fuels and Lubricant Basestocks Fuels Hydrocarbons and Synthetic Lubricants Performance/Property Testing Procedures