Method for reducing piston deposits in a marine diesel engine

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United States of America Patent

PATENT NO 11685872
APP PUB NO 20210047576A1
SERIAL NO

16987694

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Abstract

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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.

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Patent Owner(s)

Patent OwnerAddress
INFINEUM INTERNATIONAL LIMITEDABINGDON OXFORDSHIRE OX13 6BB

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Clitherow, Timothy M Didcot, GB 1 1
Hughes, Jonathan M Abingdon, GB 10 85
Marsh, Adam P Witney, GB 15 33

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