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Quantification of Lubricant Reactivity Using Constant Volume Combustion Device

Abstract: 

A method for identifying a lubricant composition that reduces the propensity for knock in an engine. The lubricant composition is mixed with a solvent to reduce the viscosity of the lubricant composition, thereby forming a lubricant-solvent mixture having a viscosity similar to or less than that of engine fuel. A sample of a lubricant-solvent mixture is then subjected to a constant volume combustion test to determine the reactivity associated with the lubricant-solvent mixture. The test is repeated for a range of lubricant-solvent ratios, and statistical methods are used to calculate the reactivity of the lubricant composition without solvent.

Patent Number: 
8,026,105
Date Of Issue: 
09/27/2011
Inventors: 

Manfred Amann; Terrence F. Alger II