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Lubricant composition for trunk piston diesel engine

A technology of lubricating oil composition and cylindrical piston, which is applied in the direction of lubricating composition, petroleum industry, additives, etc., can solve problems that have not been researched, and achieve the effect of reducing fuel consumption

Active Publication Date: 2016-11-09
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, for medium-speed 4-stroke trunk piston diesel engines for ships, instead of suppressing the increase in fuel consumption over time, lubricating oil actively targets the reduction in fuel consumption itself. Such an attempt has not yet been made. Research

Method used

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  • Lubricant composition for trunk piston diesel engine
  • Lubricant composition for trunk piston diesel engine
  • Lubricant composition for trunk piston diesel engine

Examples

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Embodiment 1～9 and comparative example 1～2

[0109] As shown in Table 1, lubricating oil compositions of the present invention (Examples 1-9) and comparative lubricating oil compositions (Comparative Examples 1-2) were prepared respectively. In the tables, "inmass%" means mass % based on the total amount of base oil, and "mass%" means mass % based on the total amount of the composition.

[0110] [Table 1]

[0111]

[0112] *1) Mineral oil-based base oil, kinematic viscosity at 40°C is 19.9mm 2 / s, 100℃ kinematic viscosity 4.3mm 2 / s, viscosity index 125, sulfur <0.03%

[0113] *2) Mineral oil-based base oil, kinematic viscosity at 40°C is 54.9mm 2 / s, 100℃ kinematic viscosity 7.4mm 2 / s, viscosity index 95, sulfur content 0.66%

[0114] *3) Mineral oil-based base oil, kinematic viscosity at 40°C is 95.0mm 2 / s, 100℃ kinematic viscosity 11.0mm 2 / s, viscosity index 97, sulfur content 0.58%

[0115] *4) Mineral oil base oil, kinematic viscosity at 40°C is 476.1mm 2 / s, 100℃ kinematic viscosity 31.4mm 2 / s, vis...

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Abstract

A lubricant composition for medium-speed trunk piston diesel engines which comprises: as a base oil for the lubricant, one or more members selected from the group consisting of a mineral oil and a synthetic oil having a dynamic viscosity at 100 DEG C of 3 mm2 / s or more but less than 6 mm2 / s, a mineral oil and a synthetic oil having a dynamic viscosity at 100 DEG C of 6 mm2 / s or more but less than 9 mm2 / s and a mineral oil and a synthetic oil having a dynamic viscosity at 100 DEG C of 9 mm2 / s or more but less than 13 mm2 / s; and, as a metal-based detergent, one or more kinds of calcium salicylate detergents optionally combined with a calcium phenate detergent, has a dynamic viscosity at 100 DEG C of 7.0-11.0 mm2 / s or lower and a high shear viscosity at 70 DEG C of 7.0-20.0 mPa.s, and has a base number determined by the perchloric acid method of 7-55 mgKOH / g.

Description

technical field [0001] The present invention relates to a lubricating oil composition for a medium-speed trunk-piston diesel engine, in particular to a lubricating oil composition for a 4-stroke medium-speed trunk-piston diesel engine for ships. Background technique [0002] In diesel engines used for ships, power generation, etc., heavy fuels (C heavy oil, etc.) containing asphaltenes are used from the viewpoint of economical efficiency. Such lubricating oil compositions for diesel engines require detergency to prevent engine fouling due to asphaltene components of heavy fuels, and acid neutralization properties to neutralize acidic components derived from sulfur content of heavy fuels. And water separability for water washing treatment in lubricating oil purification equipment. In addition, medium-speed 4-stroke trunk piston diesel engines for ships operate at a substantially constant speed of about 200 rpm to 1200 rpm at a lower speed, and operate at higher temperatures ...

Claims

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Application Information

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IPC IPC(8): C10M159/22C10N10/04C10N20/00C10N20/02C10N30/00C10N30/06C10N40/25
CPCC10M159/22C10M171/02C10M2203/1006C10M2207/028C10M2207/262C10N2020/02C10N2030/06C10N2030/54C10N2040/252C10M125/12C10N2040/25
Inventor 守田洋子
Owner JX NIPPON OIL & ENERGY CORP
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