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AssigneeExxonMobil Research and Engineering Company
InventorsJason Z. Gao, Eugine Choi, Matthew W. Boland, Luca Salvi
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A lubricant composition for high compression spark ignition engines that contains at least one bismuth-containing compound (e.g., a bismuth salt of a carboxylic acid). A method for preventing or reducing engine knock and pre-ignition in an engine lubricated with a formulated oil. The formulated oil has a composition including at least one bismuth-containing compound (e.g., a bismuth salt of a carboxylic acid). A fuel composition for high compression spark ignition engines that contains at least one bismuth-containing compound (e.g., a bismuth salt of a carboxylic acid). A method for preventing or reducing engine knock and pre-ignition in an engine by using a fuel additive composition in a gasoline fuel composition. The fuel additive composition contains at least one bismuth-containing compound (e.g., a bismuth salt of a carboxylic acid). The lubricating oils of this disclosure are useful as passenger vehicle engine oil (PVEO) products.
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 from 98 to 99 mass % of at least one branched hydrocarbon having greater than 20 carbon atoms and having at least 50% of the carbons in the form of methyl groups and from 1 to 2 mass % of bismuth naphthenate, based on the total weight of the lubricating oil, and
A lubricating engine oil for high compression spark ignition engine having a composition comprising, based on the total weight of the lubricating oil, from 1 to 2 mass % of bismuth naphthenate, and from 98 to 99 mass % of at least one branched hydrocarbon having greater than 20 carbon atoms and having at least 50% of the carbons in the form of methyl groups, and
Dependencies are inferred from the claim text.