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US 4,394,276 AGranted
Method for improving fuel economy of internal combustion engines using sulfur-containing alkanediols
AssigneeChevron Research Company
InventorVernon R. Small, Jr.
Life of this patent
Estimating the term…
Abstract
Lubricating oils containing sulfur-containing alkane diols have been found to reduce fuel consumption in an internal combustion engine.
Claims14
A lubricating oil composition comprising a major proportion of an oil of lubricating viscosity and a minor effective amount of a sulfur-containing alkane diol fricton-reducing additive of the formula ##STR6## wherein R is alkyl containing from 5 to 30 carbon atoms, m is 1 or 2 and n is 0 or 1.
A lubricating oil composition formulated for use in the crankcase of an internal combustion engine in order to improve the fuel consumption of said engine comprising:
- (a) a major amount of an oil of lubricating viscosity;
- and
- (b) an effective amount of each of the following:
- (1) from 1%-20% of an alkenyl succinimide or alkenyl succinate, or mixture thereof,
- (2) from 0.1%-4% of a Group II metal salt of a dihydrocarbyl dithiophosphoric acid,
- (3) from 0.3%-10% of a neutral or overbased alkali or alkaline earth metal hydrocarbyl sulfonate, or mixtures thereof,
- (4) from 0.2%-27% of a neutral or overbased alkali or alkaline earth metal alkylated phenate, or mixtures thereof, and
- (5) from 0.1%-5% of sulfur-containing alkane diol friction modifying agent of the formula ##STR7## wherein R is alkyl containing from 5 to 30 carbon atoms, R.sup.1 is hydrogen or alkyl containing from 1 to 4 carbon atoms, m is 1 or 4 and n is 0 or 1.
5 more elements
Dependencies are inferred from the claim text.