Mixed detergent composition for intake valve deposit control
AssigneeAfton Chemical Corporation
InventorsJoseph M. Russo, William Jay Colucci
Life of this patent
Estimating the term…
Abstract
A detergent additive package, fuel additive concentrate, fuel composition and method for operating an engine on an unleaded gasoline fuel. The additive package includes a Mannich base detergent mixture, wherein the mixture contains a first Mannich base detergent component derived from a di- or polyamine and a second Mannich base detergent component derived from a monoamine. A weight ratio of the first Mannich base detergent to the second Mannich base detergent in the mixture ranges from about 1:6 to about 3:1.
Claims22
A detergent additive package for an unleaded gasoline fuel comprising a Mannich base detergent mixture, wherein the mixture comprises a first Mannich base detergent component having a tertiary amino group and derived from an aliphatic linear, branched, or cyclic diamine having one primary or secondary amine group and one tertiary amino group in the molecule and a second Mannich base detergent component derived from a monoamine, wherein a weight ratio of the first Mannich base detergent to the second Mannich base detergent in the mixture ranges from about 1:6 to about 3:1.
A fuel additive package for a spark-ignition engine comprising
- (a) a first Mannich base detergent component having a tertiary amino group and derived from an aliphatic linear, branched, or cyclic diamine having one primary or secondary amine group and one tertiary amino group in the molecule,
- (b) a second Mannich base detergent component derived from a monoamine,
- (c) an antiwear component, and
- (d) a carrier fluid component selected from the group consisting of a polyether monool and polyether polyol,
- wherein a weight ratio of the first Mannich base detergent to the second Mannich base detergent in the fuel additive package ranges from about 1:6 to about 3:1.
A method for operating a spark-ignition engine on an unleaded fuel composition, the method comprising:
- supplying to the engine a fuel composition comprising:
- (a) a gasoline fuel,
- (b) a first Mannich base detergent having a tertiary amino group and derived from an aliphatic linear, branched, or cyclic diamine having one primary or secondary amine group and one tertiary amino group in the molecule,
- (c) a second Mannich base detergent derived from a monoamine,
- (d) an antiwear component, and
- (e) optionally, a succinimide detergent,
- wherein a weight ratio of (b) to (c) in the fuel ranges from about 1:6 to about 3:1;
- introducing into the engine the fuel composition for combustion thereof, and operating the engine.
An unleaded fuel composition for a spark-ignited engine, comprising
- (a) a major amount of a gasoline fuel,
- (b) a minor amount of a first Mannich base detergent having a tertiary amino group and derived from an aliphatic linear, branched, or cyclic diamine having one primary or secondary amine group and one tertiary amino group in the molecule,
- (c) minor amount of a second Mannich base detergent derived from an di-alkyl monoamine,
- (d) an antiwear component selected from the group consisting of a hydrocarbyl amide and a hydrocarbyl imide, and
- (f) a polyether carrier fluid,
- wherein a weight ratio of the first Mannich base detergent to the second Mannich base detergent in the fuel composition ranges from 1:6 to about 3:1.
A method for improving at least one of reducing intake valve deposits or improving antiwear performance in a spark-ignition engine, comprising a fuel composition comprising:
- (a) a major amount of a gasoline fuel containing ethanol,
- (b) a minor amount of a first Mannich base detergent having a tertiary amino group and derived from an aliphatic linear, branched, or cyclic diamine having one primary or secondary amine group and one tertiary amino group in the molecule,
- (c) minor amount of a second Mannich base detergent derived from an di-alkyl monoamine,
- (d) an antiwear component selected from the group consisting of a hydrocarbyl amide and a hydrocarbyl imide, and
- (e) a polyether carrier fluid comprising C6-C20 alkylphenol propoxylate, wherein a weight ratio of the first Mannich base detergent to the second Mannich base detergent in the fuel composition ranges from 1:6 to about 3:1;
- supplying the fuel composition to the engine, and
- combusting the fuel composition in the engine.
Dependencies are inferred from the claim text.