Fuel compositions
AssigneeInnospec Limited
InventorsJacqueline REID, Martin ROBERTS, Alan ROSS, Michael James SIMMS
Life of this patent
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Abstract
A diesel fuel composition including (a) a quaternary ammonium salt additive; and (b) one or more nitrogen-free detergents; wherein the quaternary ammonium salt additive includes the quaternised reaction product of a hydrocarbyl substituted succinic acid derived acylating agent and a compound able to react with said acylating agent and which includes a tertiary amine group; wherein each molecule of the hydrocarbyl substituted succinic acid derived acylating agent includes on average at least 1.2 succinic acid moieties.
Claims24
A diesel fuel composition comprising (a) a quaternary ammonium salt additive;
- and (b) one or more nitrogen-free detergents;
- wherein the quaternary ammonium salt additive comprises the quaternised reaction product of a hydrocarbyl substituted succinic acid derived acylating agent and a compound able to react with said acylating agent and which includes a tertiary amine group:
- wherein each molecule of the hydrocarbyl substituted succinic acid derived acylating agent includes on average at least 1.2 succinic acid moieties.
A method of Improving the performance of a diesel engine, the method comprising combusting in the engine a diesel fuel composition comprising (a) a quaternary ammonium salt additive;
- and (b) one or more nitrogen-free detergents;
- wherein the quaternary ammonium salt additive comprises the quaternised reaction product of a hydrocarbyl substituted succinic acid derived acylating agent and a compound able to react with said acylating agent and which Includes a tertiary amine group;
- wherein each molecule of the hydrocarbyl substituted succinic acid derived acylating agent includes on average at least 1.2 succinic acid moieties.
A use of a combination of (a) a quaternary ammonium salt additive and (b) one or more nitrogen-free detergents to improve the performance of a diesel engine;
- wherein the quaternary ammonium salt additive comprises the quaternised reaction product of a hydrocarbyl substituted succinic acid derived acylating agent and a compound able to react with said acylating agent and which includes a tertiary amine group;
- wherein each molecule of the hydrocarbyl substituted succinic acid derived acylating agent includes on average at least 1.2 succinic acid moieties.
Dependencies are inferred from the claim text.