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US 9,175,237 B2Granted
Trunk piston engine lubricating oil compositions
AssigneeChevron Oronite Technology B.V.
InventorMarcel Verlinde
Life of this patent
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Abstract
This invention encompasses trunk piston engine lubricating oil compositions, comprising a major amount of one or more Group I base oils; and one or more dispersant additives, wherein the concentration of the one or more dispersant additives within the trunk piston engine lubricating oil composition is about 0.2-0.6 wt. % on an actives basis; and methods for making and using the trunk piston engine lubricating oil compositions.
Claims9
A trunk piston engine lubricating oil composition, comprising:
- a) at least 80 wt % of one or more Group I base oils;
- b) 0.2-0.6 wt. % of one or more dispersant additives, on an actives basis, comprising a polyisobutene derived bis-succinimide, a borated polyisobutene derived bis-succinimide, or an ethylene carbonate polyisobutene derived bis-succinimide;
- and
- c) a carboxylate-containing detergent additive mixture in an amount of about 13.78 wt. % comprising:
- i) one or more unsulfurized, non-carbonated, non-overbased carboxylate containing detergents, comprising a non-overbased salt of a mixture of an alkyl-substituted hydroxybenzoic acid and an alkyl-substituted phenol;
- and
- ii) one or more overbased detergents comprising an overbased salt of an alkyl-substituted hydroxybenzoic acid, wherein greater than 95% of the alkyl groups are C20 or greater;
- iii) an antiwear agent comprising a zinc dialkyldithiophosphate;
- wherein the trunk piston engine lubricating oil composition:
- 1) has a total base number in the range of from 30 to 50;
- and
- 2) has a phosphorus content of from 0.02 wt. % to 0.08 wt. %, based on the total weight of the trunk piston engine lubricating oil composition.
9 more elements
A method for making a trunk piston engine lubricating oil composition, comprising mixing:
- a) at least 80 wt. % of one or more Group I base oils;
- b) 0.2-0.6 wt. % of one or more dispersant additives, on an actives basis, comprising a polyisobutene derived bis-succinimide, a borated polyisobutene derived bis-succinimide, or an ethylene carbonate polyisobutene derived bis-succinimide;
- and
- c) a carboxylate-containing detergent additive mixture in an amount of about 13.78 wt. % comprising:
- i) one or more unsulfurized, non-carbonated, non-overbased carboxylate containing detergents, comprising a non-overbased salt of a mixture of an alkyl-substituted hydroxybenzoic acid and an alkyl-substituted phenol;
- and
- ii) one or more overbased detergents comprising an overbased salt of an alkyl-substituted hydroxybenzoic acid, wherein greater than 95% of the alkyl groups are C20 or greater;
- iii) an antiwear agent comprising a zinc dialkyldithiophosphate;
- wherein the trunk piston engine lubricating oil composition:
- 1) has a total base number in the range of from 30 to 50;
- and
- 2) has a phosphorus content of from 0.02 wt. % to 0.08 wt. %, based on the total weight of the trunk piston engine lubricating oil composition.
9 more elements
A method for reducing black sludge and deposit formation in an engine, comprising lubricating the engine with a trunk piston engine lubricating oil composition, comprising:
- a) at least 80 wt. % of one or more Group I base oils;
- b) 0.2-0.6 wt. % of one or more dispersant additives, on an actives basis, comprising a polyisobutene derived bis-succinimide, a borated polyisobutene derived bis-succinimide, or an ethylene carbonate polyisobutene derived bis-succinimide;
- and
- c) a carboxylate-containing detergent additive in an amount of about 13.78 wt. % mixture comprising:
- i) one or more unsulfurized, non-carbonated, non-overbased carboxylate containing detergents, comprising a non-overbased salt of a mixture of an alkyl-substituted hydroxybenzoic acid and an alkyl-substituted phenol;
- and
- ii) one or more overbased detergents comprising an overbased salt of an alkyl-substituted hydroxybenzoic acid, wherein greater than 95% of the alkyl groups are C20 or greater;
- iii) an antiwear agent comprising a zinc dialkyldithiophosphate;
- wherein the trunk piston engine lubricating oil composition:
- 1) has a total base number in the range of from 30 to 50;
- and
- 2) has a phosphorus content of from 0.02 wt. % to 0.08 wt. %, based on the total weight of the trunk piston engine lubricating oil composition.
9 more elements
A method for operating a trunk piston engine, comprising lubricating the trunk piston engine with a trunk piston engine lubricating oil composition comprising:
- a) at least 80 wt. % of one or more Group I base oils;
- b) 0.2-0.6 wt. % of one or more dispersant additives, on an actives basis, comprising a polyisobutene derived bis-succinimide, a borated polyisobutene derived bis-succinimide, or an ethylene carbonate polyisobutene derived bis-succinimide;
- and
- c) a carboxylate-containing detergent additive mixture in an amount of about 13.78 wt. % comprising:
- i) one or more unsulfurized, non-carbonated, non-overbased carboxylate containing detergents, comprising a non-overbased salt of a mixture of an alkyl-substituted hydroxybenzoic acid and an alkyl-substituted phenol;
- and
- ii) one or more overbased detergents comprising an overbased salt of an alkyl-substituted hydroxybenzoic acid, wherein greater than 95% of the alkyl groups are C20 or greater;
- iii) an antiwear agent comprising a zinc dialkyldithiophosphate;
- wherein the trunk piston engine lubricating oil composition:
- 1) has a total base number in the range of from 30 to 50;
- and
- 2) has a phosphorus content of from 0.02 wt. % to 0.08 wt. %, based on the total weight of the trunk piston engine lubricating oil composition.
9 more elements
Dependencies are inferred from the claim text.