A kind of diesel engine oil with high supercharging and long service life and preparation method thereof

Abstract

The invention provides a high-pressure-charging long-service-life diesel engine oil which comprises the following components in percentage by weight: 80-90% of base oil and 10-20% of additive. The base oil comprises 72-80% of paraffin base Type II or Type III, 3-6% of high-viscosity poly-alpha-olefin of which the viscosity is 100-300 mm<2> / s at 100 DEG C and 1-3% of ester oil. The additive comprises 1-3% of hyperalkaline calcium sulfonate, 7-10% of polyisobutylene polysuccimide, 1-3% of sulfurized calcium alkyl phenate, 1-3% of sulfur / phosphorus bis octyl alkaline octyl salt, 0.001-0.005% of oil-soluble graphene, 0.3-1% of amine high-temperature antioxidant, 0.1-0.3% of pour-point depressant and 0.001-0.002% of composite defoaming agent. The diesel engine oil has the advantages of excellent high temperature detergency, excellent acid neutralizing capacity and rust resistance, is capable of effectively reducing high-temperature deposits on engine components and prolonging the oil change period, can inhibit the carbon deposits and paint film on the engine piston from generation, can form a complex micelle with a metallic detergent, has the characteristics of excellent consonance effect, excellent heat stability and outstanding abrasion resistance.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a high-pressure and long-life diesel engine oil and a preparation method thereof. Background technique [0002] With the improvement of refining technology, the output of Group II and Group III base oils is getting higher and higher worldwide. It has become a trend to use Group II and Group III base oils to blend high-performance diesel engine oils. However, base oils increase with the refining depth , while the performance is improved, the solubility is greatly reduced, especially for paraffin-based base oils. In order to achieve qualified low-temperature performance, it is often necessary to add 5% to 10% viscosity index improvers, and viscosity index improvers are all It is composed of substances with high viscosity and high molecular weight. Under the high temperature and high shear of the internal combustion engine, the viscosity tends to gradually decrease, whic...

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Problems solved by technology

[0002] With the improvement of refining technology, the output of Group II and Group III base oils is getting higher and higher worldwide. It has become a trend to use Group II and Group III base oils to blend high-performance diesel engine oils. However, base oils increase with the refining depth , while the performance is improved, the solubility is greatly reduced, especially for paraffin-based base oils. In order to achieve qualified low-temperature performance, it is often necessary to add 5% to 10% viscosity index improvers, and viscosity index improvers are all It is composed of substances with high viscosity and high molecular weight. Under the high temperature and high shear of the internal combustion engine, the viscosity tends to gradually decrease, which reduces the pressure of diesel vehicles. At the same time, the viscosity index improver has poor high temperature performance and is harmful to the cleaning of oil Resistance and oxidation resistance are unfavorable, which greatly reduces the service life

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