公开(公告)号：US11685872B2

公开(公告)日：2023-06-27

申请号：US16987694

申请日：2020-08-07

Applicant: Infineum International Limited

Inventor： Jonathan M. Hughes ,  Timothy M. Clitherow ,  Adam P. Marsh

IPC: C10L10/04 ,  C10L10/06 ,  C10L1/16 ,  C10L1/196 ,  C10L1/14

CPC classification number: C10L10/04 ,  C10L1/143 ,  C10L1/1616 ,  C10L1/196 ,  C10L10/06 ,  C10L2270/026

Abstract: A method of reducing the incidence of deposits on the pistons of a 4-stroke marine diesel engine during operation of the engine when it is fuelled with a marine residual fuel meeting the ISO 8217 2017 fuel standard for marine residual fuels and having a sulphur content of more than 0.1% and less than 0.5% by mass. The method includes the step of lubricating the engine using a lubricating oil composition comprising:



a) at least 50% by mass, based on the mass of the composition, of an oil of lubricating viscosity;
(b) 5 to 25% by mass, based on the mass of the composition, of an oil-soluble or oil-dispersible alkali metal or alkaline earth metal salicylate detergent, or a mixture of two or more oil-soluble or oil-dispersible alkali metal or alkaline earth metal salicylate detergents;
(c) 0.1 to 10% by mass, based on the mass of the composition of one or more oil-soluble or oil-dispersible ashless dispersants; and optionally,
(d) 0.1 to 10% by mass, based on the mass of the composition of a polyalkylene-substituted succinic anhydride.

公开(公告)号：US20210047576A1

公开(公告)日：2021-02-18

申请号：US16987694

申请日：2020-08-07

Applicant: Infineum International Limited

Inventor： Jonathan M. Hughes ,  Timothy M. Clitherow ,  Adam P. Marsh

IPC: C10L10/04 ,  C10L10/06 ,  C10L1/16 ,  C10L1/196 ,  C10L1/14

Abstract: A method of reducing the incidence of deposits on the pistons of a 4-stroke marine diesel engine during operation of the engine when it is fuelled with a marine residual fuel meeting the ISO 8217 2017 fuel standard for marine residual fuels and having a sulphur content of more than 0.1% and less than 0.5% by mass. The method includes the step of lubricating the engine using a lubricating oil composition comprising: a) at least 50% by mass, based on the mass of the composition, of an oil of lubricating viscosity; (b) 5 to 25% by mass, based on the mass of the composition, of an oil-soluble or oil-dispersible alkali metal or alkaline earth metal salicylate detergent, or a mixture of two or more oil-soluble or oil-dispersible alkali metal or alkaline earth metal salicylate detergents; (c) 0.1 to 10% by mass, based on the mass of the composition of one or more oil-soluble or oil-dispersible ashless dispersants; and optionally, (d) 0.1 to 10% by mass, based on the mass of the composition of a polyalkylene-substituted succinic anhydride.