Bench Wear and Single-Cylinder Engine Evaluations of High-Temperature Lubricants for U.S. Army Ground Vehicles
Interim rept. Jan 1990-Sep 1993
SOUTHWEST RESEARCH INST SAN ANTONIO TXBELVOIR FUELS AND LUBRICANTS RESEARCHFACILITY
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High-temperature lubricant HTL requirements for future U.S. Army ground vehicles were investigated. A single-cylinder diesel engine SCE-903 was successfully modified to operate at increased cylinder liner temperatures and to serve as an evaluation tool for HTLs. Oil D, one of six lubricants evaluated, completed 200 test hours at an average cylinder wall temperature of 247 deg C and an oil sump temperature of 166 deg C with only minor oil degradation. However, improved piston cleanliness is desired. A wide range of bench scale wear techniques have been developed to highlight different lubricant performance characteristics, with particular emphasis on high-temperature operation and oxidation. Based on the bench tests, Oil D would be expected to have inadequate high-temperature, long-term wear protection. Oil D passed the Allison C-4 graphite clutch friction test. Lubricant, Low-heat rejection engine, Scuffing, Deposits, Diesel engine, Tribology, Friction coefficient, Wear rate, Adiabatic engine, Bench test, Wear volume, Piston rings, High-temperature oil, C-4 Friction, Ester, Oxidation, Synthetic oil.
- Lubricants and Hydraulic Fluids
- Surface Transportation and Equipment
- Reciprocating and Rotating Engines