Marine engine lubrication

An engine, marine technology, applied in the direction of engine lubrication, engine components, machines/engines, etc., can solve problems that do not involve economy and so on

Inactive Publication Date: 2013-05-29
INFINEUM INT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, '995 does not address the economics of treating TPEO to suppress "black paint" formation
A considerable cost arises from the detergent soap used, i.e. the amount of detergent other than the alkaline material

Method used

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  • Marine engine lubrication

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0074] The invention is illustrated by, but by no means limited to, the following examples.

[0075] components

[0076] Use the following components:

[0077] Component (A): One or more calcium alkyl salicylate detergents having an alkalinity index of 3-6

[0078] Component (B): mixed 2- and 4-(linear C 16 Alkyl)phenol(2:1)

[0079] Base Oil I: Solvent extracted API Group I base oil

[0080] HFO: Heavy Fuel Oil (ISO-F-RMK380)

[0081] lubricant

[0082] The above components are selectively blended to obtain a range of trunk piston marine lubricants. Some lubricants are examples of the invention; others are reference examples for comparison. The lubricant compositions tested when each contained HFO are shown in the table below under the heading "Results".

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Abstract

Trunk piston marine engine lubrication, when the engine is fuelled by heavy fuel oil, is effected by a composition of TBN in the range of 20 to 60 comprising a major amount of an oil of lubricating viscosity containing 50 mass % or more of a Group 1 basestock, and respective minor amounts of an overbased metal calcium alkyl salicylate detergent providing 40 to 90 mmol of calcium alkyl salicylate per kg of the composition, and 0.1 to 10 mass %, based on the mass of the composition, of an oil-soluble linear alkyl-substituted phenol. Asphaltene precipitation in the lubricant (black paint), caused by the presence of contaminant heavy fuel oil, is prevented or inhibited.

Description

field of invention [0001] This invention relates to trunk piston marine engine lubricating compositions for medium speed four-stroke compression ignition (diesel) marine engines and the lubrication of such engines. Background of the invention [0002] Marine trunk piston engines typically run off-shore using heavy fuel oil ("HFO"). Heavy fuel oil is the heaviest fraction of petroleum distillates and contains a complex mixture of molecules including up to 15% asphaltenes, defined as being insoluble in excess aliphatic hydrocarbons such as heptane but soluble in aromatic solvents (such as toluene) in the fraction of petroleum distillates. Asphaltene can enter the engine lubricant as a pollutant via cylinders or fuel pumps and injectors, and asphaltene can then precipitate as "black paint" or "black sludge" in the engine. The presence of such carbonaceous deposits on the piston surface can act as an insulating layer, which can lead to the formation of cracks which then propag...

Claims

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Application Information

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IPC IPC(8): C10M129/02C10N40/25C10N30/04
CPCC10N2210/02C10M129/10C10N2230/04C10M129/54C10N2030/04C10N2010/04C10N2040/25C10M2207/023C10M163/00C10N2230/52C10M169/042C10N2240/102C10M2203/1006C10M2207/262C10N2030/52C10N2040/252C10N2020/069C10M141/02C10M169/04C10M141/12F01M7/00
Inventor T·加纳R·J·格拉斯
Owner INFINEUM INT LTD
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