Diesel engine oil composition and application thereof

Abstract

The invention relates to a diesel engine oil composition and application thereof, and mainly solves the problems of insufficient anti-wear and extreme pressure performance of internal combustion engine oil in the prior art. The diesel engine oil composition comprises the following components by weight: a) 2-5 parts of a metal detergent, which is formed by compounding a sulfonate and sulfurized alkyl phenolate; b) 1-5 parts of a polyisobutylene succinimide ashless dispersant; c) 1-3 parts of an anti-wear preservative, which is formed by compounding long chain primary alcohol based zinc dialkyldithiophosphate and primary alcohol based zinc dialkyl dithiophosphate; d) 0.5-3 parts of a composite antioxidant, which is formed by compounding an amine type antioxidant and a phenolic ester antioxidant; e) 0.5-3 parts of an antiwear agent, which is one of or compounded by several of phosphorothioates, thiocarbamates and antimony thiocarbamate; and f) 85-105 parts of base oil. The technical scheme adopted by the invention well solves the problems, and can be used in a vehicle diesel engine system.

Description

technical field [0001] The invention relates to a diesel engine oil composition and its application. Background technique [0002] Anti-wear and extreme pressure properties are one of the important properties of internal combustion engine oils. Excellent anti-wear and extreme pressure properties help reduce adhesive wear and surface fatigue wear between mechanical parts. By forming a lubricant film on the friction surface, it can reduce friction and support the load, thereby reducing surface wear and scratches and maintaining the fitting accuracy of parts. [0003] Under harsh working conditions such as high vehicle load and climbing, the engine lubrication will enter the boundary lubrication state, and the lubricating effect provided by the viscosity of the lubricating oil will become poor. It is necessary for the additives in the lubricating oil to form a physical adsorption film, a chemical adsorption film or a chemical reaction film. Protect the engine. The use of oils...

AI Technical Summary

Problems solved by technology

[0005] The diesel engine oil compositions in the above documents can all meet the performance requirements of the CH-4 diesel engine oil quality grade, but there is still room for improvement in their anti-wear and extreme pressure properties.

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