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Laboratory Development and Engine Performance of New High-Temperature Diesel Engine Lubricants
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Abstract
New high-temperature lubricants are being developed for future U.S. Army low heat rejection diesel engines. Compared to the best previous low heat rejection diesel engine lubricant, the first new lubricant developed was shown to (1) be less volatile, (2) have 55°C (100°F) greater oxidative stability, and (3) increase high-temperature single cylinder engine life more than five times.
The new lubricant successfully completed a 400 hr multicylinder engine test in a U.S. Army 5-ton truck adiabatic engine. Lubricant property changes, engine wear, deposits and oil consumption were all very low.
Two additional new liquid lubricants were developed for operation at higher engine temperatures than those of the 5-ton truck. Engine tests of these new lubricants will be conducted in the near future. Hybrid liquid/solid lubricants were formulated and evaluated for potential reduction of wear and friction at high temperature, with mixed results.
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Sutor, P. and Bryzik, W., "Laboratory Development and Engine Performance of New High-Temperature Diesel Engine Lubricants," SAE Technical Paper 890145, 1989, https://doi.org/10.4271/890145.Also In
References
- Sutor P. Bryzik W. “Development of Advanced High-Temperature Liquid Lubricants,” SAE paper 880015 in Recent Advances in the Adiabatic Engine , SAE SP-738 37 1988
- Sutor P. Bryzik W. “Tribological Systems for High Temperature Diesel Engines,” SAE paper 870157 in Adiabatic Engines and Systems , SAE SP-700 165 1987
- Coers R. Fox L. Jones D. “Cummins Uncooled 250 Engine,” The Adiabatic Engine: Past, Present and Future Developments , SAE PT-28 425 1984