Engine lubricating oil comprising a quaternary ammonium hydroxide
AssigneeExxon Research & Engineering Co.
InventorsJoseph Vardi, Nicholas Feldman, Jacob J. Habeeb, Morton Beltzer
Life of this patent
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Abstract
The presence of a minor amount of certain quaternary ammonium hydroxides in an engine lubricating oil has been found to be effective in reducing and controlling combustion chamber deposits and octane requirement increase in spark ignition internal combustion engines and in reducing oil consumption in diesel engines.
Claims42
An improved engine lubricating oil composition comprising a mixture of a major amount of a lubricating base oil and a minor amount of a quaternary ammonium hydroxide having the general formula:
- ##STR2## wherein R.sub.1 is a hydrocarbon radical or a hydroxy terminated radical having from 1 to 24 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 24 carbon atoms, and R.sub.3 and R.sub.4 are hydrocarbon radicals having from 4 to 24 carbon atoms.
An improved automotive lubricating engine oil composition comprising a mixture of a major amount of a lubricating base oil and a minor amount of a quaternary ammonium hydroxide having the general formula:
- ##STR3## wherein R.sub.1 is a hydrocarbon radical or a hydroxy terminated radical having from 1 to 24 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 24 carbon atoms, and R.sub.3 and R.sub.4 are hydrocarbon radicals having from 4 to 24 carbon atoms, the quaternary ammonium hydroxide being present in an amount sufficient to control the octane requirement increase of an engine using said composition.
An improved diesel engine lubricating oil composition comprising a mixture of a major amount of a lubricating base oil and a minor amount of a quaternary ammonium hydroxide having the general formula:
- ##STR4## wherein R.sub.1 is a hydrocarbon radical or a hydroxy terminated radical having from 1 to 24 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 24 carbon atoms, and R.sub.3 and R.sub.4 are hydrocarbon radicals having from 4 to 24 carbon atoms, the quaternary ammonium hydroxide being present in an amount sufficient to reduce the oil consumption of the diesel engine.
A method of controlling the octane requirement increase of a spark ignition internal combustion engine which comprises operating said engine using a lubricating oil containing a major amount of a lubricating base oil and a minor amount of a quaternary ammonium hydroxide having the formula:
- ##STR5## wherein R.sub.1 is a hydrocarbon radical or a hydroxy terminated radical having from 1 to 24 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 24 carbon atoms, and R.sub.3 and R.sub.4 are hydrocarbon radicals having from 4 to 24 carbon atoms, the quaternary ammonium hydroxide being present in an amount sufficient to control the octane requirement increase of said engine.
A method of reducing the oil consumption in a diesel engine which comprises operating said engine using a lubricating oil containing a major amount of a lubricating base oil and a minor amount of a quaternary ammonium hydroxide having the formula:
- ##STR6## wherein R.sub.1 is a hydrocarbon radical or a hydroxy terminated radical having from 1 to 24 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 24 carbon atoms, and R.sub.3 and R.sub.4 are hydrocarbon radicals having from 4 to 24 carbon atoms, the quaternary ammonium hydroxide being present in an amount sufficient to reduce the oil consumption in the engine.
Dependencies are inferred from the claim text.