Composition and method for preventing or reducing engine knock and pre-ignition in high compression spark ignition engines
AssigneeExxonMobil Research and Engineering Company
InventorsJason Z. Gao, Eugine Choi, Matthew W. Boland, Luca Salvi
Life of this patent
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Abstract
A method for preventing or reducing engine knock or pre-ignition in a high compression spark ignition engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil. The formulated oil has a composition that contains (i) a lubricating oil base stock comprising at least one ester including at least one group selected from the group consisting of Formula (1), Formula (2), and Formula (3): The lubricating oils of this disclosure are useful as passenger vehicle engine oil (PVEO) products.
Claims25
A method for preventing or reducing engine knock or pre-ignition in a high compression spark ignition engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil, said formulated oil having a composition comprising a lubricating oil base stock comprising at least one ester selected from the group consisting of 1,1′-(2-butyl-2-ethyl-1,3-propanediyl) bis 3,5,5-trimethyl hexanoate, 3,5,5-trimethylhexyl 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctanoate, 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctyl 3,5,5-trimethylhexanoate, and combinations thereof.
A lubricating engine oil for high compression spark ignition engines having a composition comprising a lubricating oil base stock comprising at least one ester selected from the group consisting of 1,1′-(2-butyl-2-ethyl-1,3-propanediyl) bis 3,5,5-trimethyl hexanoate, 3,5,5-trimethylhexyl 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctanoate, 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctyl 3,5,5-trimethylhexanoate, and combinations thereof and one or more of a detergent, dispersant, viscosity index improver, antioxidant, pour point depressant, corrosion inhibitor, metal deactivator, seal compatibility additive, anti-foam agent, inhibitor, anti-rust additive, and friction modifier.
A method of making a lubricating engine oil for high compression spark ignition engines, said method comprising blending a lubricating oil base stock comprising at least one ester selected from the group consisting of 1,1′-(2-butyl-2-ethyl-1,3-propanediyl) bis 3,5,5-trimethyl hexanoate, 3,5,5-trimethylhexyl 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctanoate, 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctyl 3,5,5-trimethylhexanoate, and combinations thereof,
- with at least one ashless antiwear additive selected from the group consisting of a phosphorus-containing ashless antiwear additive, a sulfur-containing ashless antiwear additive, and a phosphorus/sulfur-containing ashless antiwear additive.
A method for preventing or reducing engine knock or pre-ignition in a high compression spark ignition engine lubricated with a lubricating oil by using as the lubricating oil a formulated oil, said formulated oil having a composition comprising (i) a lubricating oil base stock comprising at least one ester selected from the group consisting of 1,1′-(2-butyl-2-ethyl-1,3-propanediyl) bis 3,5,5-trimethyl hexanoate, 3,5,5-trimethylhexyl 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctanoate, 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctyl 3,5,5-trimethylhexanoate, and combinations thereof,
- and (ii) at least one ashless antiwear additive selected from the group consisting of an amine phosphate, a thiophosphate, a dithiophosphate, an amine salt of sulfurized phosphate, an alkylate phosphorothionate, and mixtures thereof.
A lubricating engine oil for high compression spark ignition engines having a composition comprising (i) a lubricating oil base stock comprising at least one ester selected from the group consisting of 1,1′-(2-butyl-2-ethyl-1,3-propanediyl) bis 3,5,5-trimethyl hexanoate, 3,5,5-trimethylhexyl 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctanoate, 2-(4,4-dimethylpentan-2-yl)-5,7,7-trimethyloctyl 3,5,5-trimethylhexanoate, and combinations thereof,
- and (ii) at least one ashless antiwear additive selected from the group consisting of an amine phosphate, a thiophosphate, a dithiophosphate, an amine salt of sulfurized phosphate, an alkylated phosphorothionate, or mixtures thereof.
Dependencies are inferred from the claim text.