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US 2011/0030637 A1Published application
Lubricant Additive Composition Suitable for Lubricating Two-Stroke Engines Fueled with Heavy Fuels
AssigneeThe Lubrizol Corporation
InventorsBrent R. Dohner, W. Preston Barnes
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Abstract
A lubricant suitable for lubricating a two-stroke cycle engine which is fueled with a liquid fuel having a volatility less than that of gasoline comprises an oleaginous synthetic ester, a normally liquid solvent having a kinematic viscosity of less than about 5 or 2 mm2/s at 100° C. and a nitrogen-containing dispersant bearing a hydrocarbyl group of at least 26 carbon atoms and having a nitrogen content of at least 4 percent by weight. The nitrogen content of the lubricant is at least about 0.3 percent by weight.
Claims21
A lubricant comprising:
- (a) at least about 5 percent by weight of an oleaginous synthetic ester;
- (b) at least about 5 percent by weight of a normally liquid solvent having a kinematic viscosity of less than about 2 mm2/s at 100° C.;
- and
- (c) about 3 to about 30 percent by weight of a nitrogen-containing dispersant bearing a hydrocarbyl group of at least 26 carbon atoms and having a nitrogen content of at least 3 percent by weight;
- wherein the nitrogen content of the lubricant is at least about 0.2 percent by weight.
2 more elements
(canceled)
Dependencies are inferred from the claim text.