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
Estimating the term…
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.
Claims37
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 one ester including at least one group selected from the group consisting of Formula (1), Formula (2), and Formula (3):
A lubricating engine oil for high compression spark ignition engines having a composition comprising 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):
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 including at least one group selected from the group consisting of Formula (1), Formula (2), and Formula (3):
- 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 containing at least one group selected from the group consisting of Formula (1), Formula (2), and Formula (3):
- 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 including at least one group selected from the group consisting of Formula (1), Formula (2), and Formula (3):
- 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.