Marine cylinder lubricant composition

Abstract

The invention relates to a marine cylinder lubricant composition. The cylinder lubricant composition comprises, by weight, 5-10% of an ultra-high base number sulphonate clearing agent, 3-8% of an ultra-high base number phenate clearing agent, 4-10% of an ultra-high base number naphthenate clearing agent, 0.5-2.5% of a dispersing agent, 0.5-1.5% of an antiwear agent, 40-60% of high viscosity indexClass I base oil 400SN / 500SN / 650SN or high viscosity index Class II base oil 400SN / 500SN / 650SN and 10-35% of Class I high viscosity index base oil HVIS 150BS. A method of compounding three clearing agents is adopted, so that respective outstanding advantages of the three clearing agents are utilized, defects of the three clearing agents are also made up, the comprehensive lubrication performance of marine lubricating oil is improved, and requirements of novel marine engines for lubricant performance can be met. Based on the premise that the composition is adapted to the traditional Class I base oil, the composition is compatible with the Class II base oil and is not restrained by base oil supply. The composition passes the original equipment manufacturer (OEM) authentication.

Description

Technical field [0001] The invention relates to a lubricating oil composition, in particular to a marine cylinder lubricating oil composition containing three ultra-high alkaline detergents. Background technique [0002] The development trend of marine engine technology is large cylinder diameter, long stroke, higher and higher combustion chamber temperature and explosion pressure, which puts forward higher performance requirements for marine cylinder lubricants that bear the lubrication between engine cylinder liners and piston rings. Lubricants need to have stronger extreme pressure and anti-wear properties, high-temperature oxidation resistance, acid neutralization and oil film diffusion properties, and they need to be tested on the designated models of the world’s major marine engine OEMs and obtain OEM technical certification before they can be used Used on its engine. Moreover, the dosage of foreign cylinder lubricating oil compounding agent is usually around 22%, and 22% ...

AI Technical Summary

Problems solved by technology

This patent only describes a high-performance detergent that is beneficial to the anti-wear performance and fuel economy of cylinder oil, but does not comprehensively examine the lubricating performance of cylinder oil products compounded with other compounding agents

[0007] Through the novelty search of domestic and foreign cylinder lubricating oil patents, the results show that: domestic cylinder lubricating oil formulas do not use ultra-high alkali value detergents, resulting in dosages of more than 26%; foreign cylinder lubricating oil formulas have not been used Reports of calcium naphthenate detergents, which will affect the diffusion performance of lubricating oil on the engine cylinder wall and reduce the cleanliness of the combustion chamber, increase engine wear and generate more deposits; cylinders have not been found in domestic and foreign patents There are reports on the application of lubricating oils in Group II base oils, but there are no related reports on marine engine OEM certification

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