	US 12,467,008 B2
	Methods and uses relating to fuel compositions
Jacqueline Reid, Port Cheshire (GB); Nigel John Broom, Port Cheshire (GB); and Adele Cross, Port Cheshire (GB)
Assigned to INNOSPEC LIMITED, Cheshire (GB)
Appl. No. 18/718,255
Filed by INNOSPEC LIMITED, Port Cheshire (GB)
PCT Filed Dec. 14, 2022, PCT No. PCT/GB2022/053216 § 371(c)(1), (2) Date Jun. 10, 2024, PCT Pub. No. WO2023/111550, PCT Pub. Date Jun. 22, 2023.
Claims priority of application No. 2118100 (GB), filed on Dec. 14, 2021.
Prior Publication US 2025/0051672 A1, Feb. 13, 2025
This patent is subject to a terminal disclaimer.
Int. Cl. C10L 10/04 (2006.01); C10L 1/222 (2006.01); C10L 10/06 (2006.01)

CPC C10L 10/04 (2013.01) [C10L 1/2222 (2013.01); C10L 10/06 (2013.01); C10L 2200/0423 (2013.01); C10L 2270/023 (2013.01)]

16 Claims

1. A method of removing deposits in a direct injection spark ignition engine, the method comprising combusting in the engine a gasoline fuel composition comprising a quaternary ammonium salt additive 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, and wherein the gasoline composition comprises from 0.1 to 50 pom of the quatemary ammonium salt additive.