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US 12,624,303 B2Granted
Gasoline additive composition for improved engine performance
AssigneeAfton Chemical Corporation
InventorsJanice Jianzhao Wang, Julienne Galante-Fox
Life of this patent
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Abstract
The present disclosure provides fuel additives including Mannich detergent additive(s) and succinimide detergent additive(s) effective to improve engine performance in both port fuel injected and gasoline direct injection engines.
Claims15
A gasoline fuel composition comprising a fuel additive for a spark-ignition engine, the fuel additive consisting of:
- a Mannich detergent prepared from polyisobutylene cresol, dibutylamine, and formaldehyde;
- a succinimide detergent prepared by reacting a hydrocarbyl-substituted succinic acylating agent with tetraethylene pentamine (TEPA) C16 to C18 propoxylated alcohol;
- and
- optionally a corrosion inhibitor, a solvent, a demulsifier, a lubricity additive, a friction modifier, a PIB amine detergent, a quaternary ammonium detergent, a bis-aminotriazole detergent, an aminoguanidine detergent, a dispersant, a carrier fluid, or combinations thereof;
- wherein a weight ratio of the Mannich detergent to the succinimide detergent is from 22:1 to about 30:1;
- wherein the succinimide detergent is a hydrocarbyl substituted mono-succinimide detergent, a hydrocarbyl substituted bis-succinimide detergent, or a combination thereof;
- and
- wherein the hydrocarbyl-substituted succinic acylating agent is a hydrocarbyl-substituted succinic anhydride, wherein the hydrocarbyl group has a molecular weight of about 700 to about 1500, and wherein a molar ratio of the hydrocarbyl-substituted succinic anhydride to the tetraethylene pentamine (TEPA) is from about 0.5:1 to about 2:1;
- and
- wherein the gasoline fuel composition includes about 55 to about 190 ppmw of the Mannich detergent, about 0.5 to about 20 ppmw of the succinimide detergent;
- and about 15 to about 60 ppmw of the C16 to C18 propoxylated alcohol.
8 more elements
A method of reducing deposits in a gasoline engine, the method consists of:
- operating a gasoline engine on a fuel composition containing a major amount of a gasoline fuel and a minor amount of a fuel additive by injecting the gasoline fuel through one or more injectors;
- wherein the fuel additive consists of (i) a Mannich detergent prepared from polyisobutylene cresol, dibutylamine, and formaldehyde;
- (ii) a succinimide detergent prepared by reacting a hydrocarbyl-substituted succinic acylating agent with tetraethylene pentamine (TEPA) (iii) C16 to C18 propoxylated alcohol;
- (iv) optionally a corrosion inhibitor, a solvent, a demulsifier, a lubricity additive, a friction modifier, a PIB amine detergent, a quaternary ammonium detergent, a bis-aminotriazole detergent, an aminoguanidine detergent, a dispersant, a carrier fluid, or combinations thereof;
- and (v) wherein the fuel additive has a weight ratio of the Mannich detergent to the succinimide detergent of from 22:1 to about 30:1;
- wherein the fuel additive reduces deposits in the gasoline engine;
- and
- wherein the succinimide detergent is a hydrocarbyl substituted mono-succinimide detergent, a hydrocarbyl substituted bis-succinimide detergent, or a combination thereof;
- and wherein the hydrocarbyl-substituted succinic acylating agent is a hydrocarbyl-substituted succinic anhydride, wherein the hydrocarbyl group has a molecular weight of about 700 to about 1500, and wherein a molar ratio of the hydrocarbyl-substituted succinic anhydride to the tetraethylene pentamine (TEPA) is from about 0.5:1 to about 2:1;
- and
- wherein the gasoline fuel composition includes about 55 to about 190 ppmw of the Mannich detergent, about 0.5 to about 20 ppmw of the succinimide detergent;
- and about 15 to about 60 ppmw of the C16 to C18 propoxylated alcohol.
9 more elements
Dependencies are inferred from the claim text.