Lubricating oil composition with stable friction performance

A lubricating oil composition and friction performance technology, applied in the field of lubricating oil, can solve the problems of affecting the automatic shifting performance of vehicles, the friction performance cannot be guaranteed, and the friction coefficient changes greatly, so as to achieve high adaptability to working temperature and high viscosity index , Improve the effect of anti-wear performance

Inactive Publication Date: 2017-07-21
XIJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most automatic transmission fluids cannot guarantee stable friction performance during use, especially for automatic transmissions with high torque and heavy loads, such as automatic transmission oils for buses, heavy trucks and other types of vehicles.
The friction coefficient changes greatly durin

Method used

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  • Lubricating oil composition with stable friction performance
  • Lubricating oil composition with stable friction performance
  • Lubricating oil composition with stable friction performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A lubricating oil composition with stable friction performance, made of the following raw materials in parts by mass:

[0031] 90.5 parts of mixed base oil

[0032] Polymethacrylate PMA 3 parts

[0033] Zinc dialkyl dithiophosphate T203 0.1 parts

[0034] Phosphorothioate T307 0.3 parts

[0035] Nano boride rare earth 0.1 part

[0036] 6 parts of other functional additives

[0037] In Example 1, the amount of polymethacrylate added is the largest, which has the best viscosity-temperature performance, can well adapt to changes in ambient temperature, has more extreme pressure additives, and has slightly better extrusion performance.

Embodiment 2

[0039] A lubricating oil composition with stable friction performance, made of the following raw materials in parts by mass:

[0040] 87 parts of mixed base oil

[0041] Polymethacrylate PMA 3.5 parts

[0042] Zinc dialkyl dithiophosphate T203 0.4 parts

[0043] Phosphorothioate T307 0.1 parts

[0044] Nano boride rare earth 0.1 part

[0045] 6 parts of other functional additives

[0046]Compared with Example 1, Example 2 increases but the amount of polymethacrylate increases, the overall viscosity increases, the viscosity index increases, the amount of anti-wear additive T203 increases, and the anti-wear property is better.

Embodiment 3

[0048] A lubricating oil composition with stable friction performance, made of the following raw materials in parts by mass:

[0049] Mixed base oil 96.4 parts

[0050] Polymethacrylate PMA 2.5 parts

[0051] Zinc dialkyl dithiophosphate T203 0.2 parts

[0052] Phosphorothioate T307 0.2 parts

[0053] Nano boride rare earth 0.3 parts

[0054] 4 parts of other functional additives

[0055] This embodiment increases the proportion of mixed base oil, reduces the polymethacrylate, and the viscosity of the oil product decreases, but increases the amount of nano-rare earth functional additives, which can ensure lubrication and reduce friction at low viscosity, and P, S content is low.

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Abstract

The invention discloses a lubricating oil composition with stable friction performance. The lubricating oil composition comprises mixed base oil, polymethacrylate, zinc dialkyl dithiophosphate T203, phosphorothioate amine salt 307, nanometer boronation rare earth additives and other functional additives. The mixed base oil comprises synthetic base oil and low-viscosity mineral base oil, and the other functional additives comprise at least one type of each category of cleaning agents, dispersing agents, antirust agents and antioxidants. The lubricating oil composition has the advantages of stable friction coefficient, low additive adding quantities and particular applicability to lubricating oil for automatic transmissions of large vehicles.

Description

technical field [0001] The invention belongs to the technical field of lubricating oil, and in particular relates to a lubricating oil composition with stable friction performance. It is especially suitable for the oil used in the automatic transmission system that has strict requirements on tribological performance. Background technique [0002] When lubricating oil is used in automatic transmissions, there are strict requirements on the friction coefficient, and in order to ensure the reliability of the mechanical parts, the friction coefficient of the oil must also be kept stable for a long time, but the oil is affected by factors such as high temperature and mechanical shear. Affecting performance changes greatly, resulting in changes in the friction coefficient of the oil, mechanical parts running wear and failure, oil performance degradation, and shortened service life. For this reason, the lubrication stability of automatic transmission oil lies in the good coordinat...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N40/04C10N30/06C10N30/02
CPCC10M169/044C10M2201/06C10M2203/1006C10M2205/0206C10M2209/08C10M2209/1023C10M2215/064C10M2215/221C10M2223/065C10N2030/06C10N2040/042
Inventor 王稳潘峰张柄李凡彬
Owner XIJING UNIV
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