Fuel compositions
AssigneeInnospec Limited
InventorsJacqueline Reid, Nigel John Broom, Adele Cross, Martin Roberts, Alan Ross
Life of this patent
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Abstract
A method of cleaning up internal diesel injector deposits in a severely fouled engine, the method including combusting in the engine a diesel fuel composition having (a) a quaternary ammonium salt additive; and (b) one or more further nitrogen-containing detergents; in which 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; in which each molecule of the hydrocarbyl substituted succinic acid derived acylating agent includes on average at least 1.2 succinic acid moieties.
Claims16
A method of cleaning up internal diesel injector deposits in a severely fouled engine, the method comprising combusting in the engine a diesel fuel composition comprising (a) a quaternary ammonium salt additive;
- and (b) one or more further nitrogen-containing 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 diesel fuel composition comprising (a) a quaternary ammonium salt additive;
- and (b) one or more further nitrogen-containing 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.
Dependencies are inferred from the claim text.