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Lubricating oil composition for trunk piston type diesel engine

A technology of lubricating oil composition and cylindrical piston, which is applied in the directions of lubricating composition, petroleum industry, base material, etc., can solve the problems of poor solubility and easy oxidative deterioration, etc.

Active Publication Date: 2018-01-09
JX NIPPON OIL & ENERGY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This unburned matter is relatively easy to dissolve in Group I base oils, but its solubility in Group II base oils and Group III base oils is poor, so it accumulates in lubricating oil passages and lubricating parts, and is prone to oxidative deterioration. thus more likely to form deposits

Method used

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  • Lubricating oil composition for trunk piston type diesel engine
  • Lubricating oil composition for trunk piston type diesel engine
  • Lubricating oil composition for trunk piston type diesel engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～10

[0157] (Examples 1-10, Comparative Examples 1-4)

[0158] Lubricating oil compositions formulated as shown in Table 1 were prepared, and a heat pipe test was carried out in accordance with JPI-5S-55-99. The results are shown in Table 1. In addition, in Table 1, the amount of the base oil is based on the total amount of the base oil, and on the other hand, the amount of the additive is based on the total amount of the composition.

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Abstract

The present invention provides a lubricating oil composition that is for a trunk-piston-type diesel engine having superior high-temperature cleanliness and low occurrence of deposits even if a group II or group III base oil is used, wherein the composition results from (D) a metal-based cleaning agent and (E) an ashless dispersant being combined with a base oil having a kinematic viscosity at 100°C of 5-16 mm2 / s and containing: (A) a mineral-oil-based lubricating base oil having at least 90 mass% of saturated hydrocarbons, no greater than 0.03 mass% of sulfur in terms of the amount of the element, a viscosity index of at least 80, and a kinematic viscosity at 100°C of 3-35 mm2 / s; and (B) at least 5 mass% on the basis of the total amount of base oil of an extract (B1) having a %CA arising as a byproduct during solvent refining in the process of producing a mineral-oil-based lubricating base oil of at least 15%, or at least 20 mass% on the basis of the total amount of base oil of a mineral-oil-based lubricating base oil (B2) having less than 90 mass% of saturated hydrocarbons, over 0.03 mass% of sulfur in terms of the amount of the element, and a kinematic viscosity at 100°C of at least 30 mm2 / s.

Description

technical field [0001] The present invention relates to a lubricating oil composition for a trunk piston type diesel engine. Background technique [0002] As the fuel for trunk piston diesel engines for ships, fuels containing asphalt components such as heavy oil A or heavy oil C are often used. However, asphalt components derived from the fuel contaminate the diesel engine, so a large amount is usually blended into lubricating oil Detergent (see Patent Document 1 below). Therefore, in lubricating oils for trunk piston diesel engines for ships, the solubility of detergents added in large quantities and the solubility of unburned asphalt and combustion-generated resins mixed from fuel are required. In particular, the solubility of unburned pitch is very important in order to prevent the occurrence of damage to the piston which may be caused by black sludge. [0003] In addition, the base oil used in the existing trunk piston type diesel engine lubricating oil is mainly obta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M169/04C10M101/02C10M107/08C10N20/02C10N30/04C10N30/08C10N40/25
CPCC10M111/02C10M2203/1006C10M2203/1025C10M2203/1045C10M2205/026C10M2207/028C10M2207/262C10M2215/28C10N2030/02C10N2030/04C10N2030/08C10N2030/40C10N2030/52C10N2030/64C10N2040/252C10N2020/04C10N2010/04C10N2020/02C10N2060/14
Inventor 守田洋子田川一生
Owner JX NIPPON OIL & ENERGY CORP