Diesel engine oil

Abstract

The invention relates to the technical field of engine lubricating oil, in particular to a diesel engine oil. The diesel engine oil contains base oil and additives, wherein the base oil comprises mineral base oil and alkyl naphthalene base oil in a weight ratio of 0.7-3:1, the additives include a viscosity index improver, a pour-point depressant, an anti-foaming agent and a composite additive, andthe composite additive consists of at least one of a dispersant, an extrusion antiwear agent, a detergent, an antioxidant, and an anticorrosion and antirust agent. By adding the alkyl naphthalene base oil into the mineral base oil, the dosage of the viscosity index improver is significantly reduced, and the compatibility with various additives is enhanced. Compared with the traditional mineral base oil formula, the anti-oxidation stability, high-and-low temperature performance, shear stability and service life of diesel engine oil lubricating oil are greatly improved, and the sediment production is reduced, thus meeting the physical and chemical performance index requirements of API CJ-4 15W-40 diesel engine oil.

Description

technical field [0001] The invention relates to the technical field of engine lubricating oil, in particular to a diesel engine oil. Background technique [0002] With the improvement of environmental protection regulations and standards, diesel engine technology is constantly updated. At present, diesel engines widely use direct injection technology and turbocharging technology to increase power, and use delayed injection technology, piston optimization, exhaust gas recirculation device and other technologies to reduce harmful gases. emissions. The development of this new engine technology and the strict requirements of environmental protection regulations make the working conditions of the engine more severe. At the same time, it also puts forward more requirements for the oxidation stability, high and low temperature performance, shear stability, and susceptibility of diesel oil. High requirements to ensure better fuel economy and longer drain intervals. [0003] Diesel...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the problems of poor compatibility with additives, low product cost performance, and poor shear resistance when adding a large amount of tackifier to increase viscosity when diesel engine oil is mainly synthetic base oil, and provides a Diesel engine oil, this diesel engine oil contains base oil and additive, wherein, described base oil is the mineral base oil and alkylnaphthalene base oil that weight ratio is 0.7-3:1;

Images