High Temperature Tribological Lubricants for Low Heat Rejection, High Temperature Operation Diesel Engine

The objective of this program is to research, formulate, and test high-temperature lubricants, materials, and modified cylinder systems optimized dimensionally for high-temperature operation. The lubricants, related materials, and system design are tooperate at a top ring reversal temperature of 410 deg C max and a sump temperature of 175 deg C. The resultant system should provide deposit levels, wear rates, and lubricant durability (viscosity change, soot loading, etc.) similar to well-developedlubricant systems in conventional diesel engines. The development of an effective high-temperature diesel engine could have very favorable results when applied to commercial applications; i.e., sigificant reduction in fuel usage and elimination of initialcost, weight, and maintenance cost associated with water pump, hoses, radiator, etc. Lubrication and cylinder kit life have been identified as major obstacles to the adoption of the adiabatic engine concept.