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Engine Oil Deposits and the TEOST -- Protocol 33 and Beyond
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English
Abstract
In its first use in simulating engine operating conditions, the Thermo-oxidation Engine Oil Simulation Test (TEOST*) was applied to the study and deposition measurement of engine oils under turbocharger operating conditions in a technique called Protocol 33C. Building on a previous paper, the authors present data and discussion on the factors involved in the high temperature cyclic test conditions of the TEOST and reemphasize differences between it and steady-state oxidation tests.
Some new studies are discussed which involve application of the TEOST apparatus at lower temperatures using simulated crankcase gases. These are believed more reflective of piston deposit conditions. Preliminary studies indicate that results from this new lower-temperature protocol correspond to known reference engine oils in regard to piston deposits and other measured factors.
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Citation
Selby, T., Richardson, J., and Florkowski, D., "Engine Oil Deposits and the TEOST -- Protocol 33 and Beyond," SAE Technical Paper 962039, 1996, https://doi.org/10.4271/962039.Also In
References
- Florkowski D W Selby T W “The Development of a Thermo-Oxidation Engine Oil Simulation Test (TEOST)” SAE Fuels and Lubricants Meeting Paper # 932837 Philadelphia, PA October 18-21 1993
- Toft G B Mainwaring R “A Severe Turbocharger Bench Engine Test for Lubricant Evaluation” Fourth Institute of Mechanical Engineers International Conference on Turbocharging and Turbochargers including Supercharging May 1990
- Ofunna G C et al “Studies on the Effects of Temperature on the Chemical Characteristics of Automotive Crankcase Oils and Their Base Oils” Tribology International 24 3 June 1991
- Keller J A et al “Lubricant Performance in Passenger Car Turbochargers” SAE Congress Paper # 810016 Detroit February 1981
- Barrow A L et al “Optimized Lubricants for Turbocharged Passenger Car Engines” SAE Fuels and Lubricants Meeting Paper # 811227 October 1981
- Neadle D J “Synthetic Lubricants for Turbocharged Passenger Cars” 4th International Colloquium Esslingen January 1984
- Murata M et al “A Study on Lubricants for Turbocharged Gasoline Engines” 7th European Automotive Symposium Agelfi, Brussells October 1983
- Toft G B et al “The Development of a Severe Turbocharger Bench Engine Test” SAE Congress Paper # 880258 Detroit February 1988
- Standard Handbook for Mechanical Engineers Seventh Baumeister T Marks L S McGraw-Hill New York 4 97 1967
- McDonnell T F Florkowski D W Performance data on three TU3M engine reference oils 1996 February 2