	US 11,867,117 B2
	Use and method to reduce deposits in compression ignition internal combustion engines
Christopher William Clayton, London (GB); Michael Gee, London (GB); Rodney Glyn Williams, London (GB); Emma Wyatt, London (GB); Alan Norman Ross, Kent (GB); Keith Woodall, Ellesmere Port (GB); Jacqueline Glen Reid, Ellesmere Port (GB); Simon Christopher Mulqueen, Ellesmere Port (GB); and Stephen Leonard Cook, Ellesmere Port (GB)
Assigned to SHELL USA, INC., Houston, TX (US)
Appl. No. 17/311,787
Filed by SHELL OIL COMPANY, Houston, TX (US)
PCT Filed Dec. 9, 2019, PCT No. PCT/EP2019/084283 § 371(c)(1), (2) Date Jun. 8, 2021, PCT Pub. No. WO2020/120416, PCT Pub. Date Jun. 18, 2020.
Claims priority of application No. 18211571 (EP), filed on Dec. 11, 2018.
Prior Publication US 2022/0025286 A1, Jan. 27, 2022
Int. Cl. F02B 77/04 (2006.01); C10L 1/18 (2006.01); C10L 1/23 (2006.01); C10L 10/04 (2006.01); F02M 26/13 (2016.01)

CPC F02B 77/04 (2013.01) [C10L 1/1811 (2013.01); C10L 1/231 (2013.01); C10L 10/04 (2013.01); C10L 2200/0446 (2013.01); C10L 2270/026 (2013.01); F02M 26/13 (2016.02)]

8 Claims

1. A method for reducing a build-up of deposits in an Exhaust Gas Recirculation (EGR) system of a compression ignition internal combustion engine comprising the steps of (i) introducing into said engine a diesel fuel composition which comprises an additive selected from alkyl nitrates, wherein the alkyl nitrates are selected from compounds having a formula R¹-ONO2 wherein R¹is an optionally substituted branched chain C2-C20 alkyl group; -(ii) combusting said diesel fuel composition in said engine; and (iii) measuring the reduction in the build-up of deposits in the EGR system.