Lubricating fluid for internal combustion engines fueled with alternative combustion fuels having high auto-ignition temperatures
AssigneeAfton Chemical Corporation
InventorsWilliam Anderson, Kenneth Garelick, Nathaniel Cain, Tara Loosmore
Life of this patent
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Abstract
A lubricating oil composition configured for lubricating an internal combustion engine fueled with an alternative fuel having an auto-ignition temperature greater than about 700K. The lubricating oil composition includes select amounts of a viscosity modifier olefin copolymer and/or a select detergent system to mitigate stochastic pre-ignition in internal combustion engines when fueled with the alternative fuels.
Claims18
A lubricating oil composition configured for lubricating an internal combustion engine fueled with a fuel having an auto-ignition temperature greater than about 700K, the lubricating oil composition comprising:
- one or more base oils of lubricating viscosity;
- and
- a viscosity modifier olefin copolymer having a weight average molecular weight of about 200,000 to about 500,000 g/mol, about 55 mol percent or less of ethylene monomer content, and a shear stability index as measured pursuant to ASTM D6278 of 50 to 55.
Dependencies are inferred from the claim text.