Transmission liquid composition for stepless speed gear

A technology of composition and transmission fluid, which is applied in the field of CVT special transmission fluid composition, can solve the problems of inability to meet the special requirements of stepless variable transformers, low-temperature fluidity and viscosity difference, etc., and achieve excellent low-temperature fluidity and good low-temperature fluidity , the effect of normal viscosity characteristics

Active Publication Date: 2007-08-01
CHINA PETROLEUM & CHEM CORP +1
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

These traction fluids generally have good traction coefficients, but their low-temperature fluidity and viscosity under working conditions are different, and some of them cannot meet the special requirements of stepless variable transformers

Method used

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  • Transmission liquid composition for stepless speed gear

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Get cumene (purity 99w%) 240 grams, formaldehyde (37% aqueous solution) 47.8 grams, sulfuric acid (concentration 98w%) 58.2 grams are raw materials. Among them, cumene and sulfuric acid were mixed and stirred in a four-necked bottle, and the temperature was raised from room temperature to 120°C. After reaching the set temperature, the formaldehyde solution placed in the dropping funnel was slowly dropped into the four-necked bottle. After the dropwise addition of formaldehyde is completed, after the heat preservation reaction for about 1 hour, the material is discharged into a separatory funnel, and extracted and washed with distilled water and n-butanol mixture (water:alcohol volume ratio is about 4:1) at about 80°C until pH=7. Cut out the upper oil phase product. After the oil phase products are collected, the unreacted raw material cumene is first distilled under the condition of residual pressure of 24-40mmHg, and then under the condition of residual pressure of le...

Embodiment 2

[0055] The synthesis process is the same as in Example 1, except that the raw material is changed to 268 grams of tert-butylbenzene, and the quality of formaldehyde and concentrated sulfuric acid remains unchanged. Condensation reaction was carried out at 120°C, followed by extraction, separation and vacuum distillation to obtain 125.5 grams of the intermediate bis(tert-butylphenyl)methane product. It was mixed with 6.7 g of 10% Pd / C catalyst and placed in an autoclave. Under the conditions of temperature 190° C., hydrogen pressure 7.0 MPa, and stirring speed 250 RPM, hydrogenation saturation was carried out. Product obtains 115.3 grams of final product after decompression head pulling, 1 The degree of hydrogenation saturation was determined to be 97.3% by H-NMR. 13 C-NMR molecular structure identification shows that bis(4-tert-butylcyclohexyl)methane is its main component.

[0056] The composition of table 3 embodiment and comparative example

[0057] components ...

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Abstract

The invention provides a stepless variable device transmission fluide compound. It comprises following components with their percentage on base oil weight: (1) bicyclo alicyclic hydrocarbon base oil, (2) alkali metal salt detersive, 0.05- 3%, (3) ashless dispersant 1- 15%, (4) phenol or amine anti- oxidant, 0.01- 1%, (5) antiwear agent, 0.05- 2%, (6) friction improver. 0.05- 3%, (7) viscosity index improver, 0-20%, (8) antifoam agent, 0- 1000ppm. The transmission fluide is characterized by good viscosity-temperature characteristic and low- temperature flowability, high drag coefficient at normal temperature, good comprehensive performance, and satification for CVT use requirement.

Description

technical field [0001] The invention relates to a lubricating oil composition, in particular to a CVT special-purpose transmission fluid composition with high viscosity index and high traction coefficient and excellent performance. technical background [0002] In recent years, improving fuel economy, reducing emissions, and improving handling flexibility have become the development trend of automobile development, and the technology of continuously variable transmission (CVT for short) is one of the most promising. Common types of CVT for vehicles are: Belt CVT (Belt / Chain-CVT, B-CVT) and Ring CVT (Torodial-CVT, T-CVT). CVT technology has significant advantages in terms of fuel economy, overtaking acceleration, ride comfort, and cost. Therefore, more and more automatic transmissions of automobiles adopt CVT design. [0003] The transmission of CVT power actually depends on the shearing force of the oil film in the contact area of ​​elastohydrodynamic lubrication (EHL). Th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M155/02C10M145/14C10M137/10C10M143/00C10M133/16C10M125/00C10N30/02C10N30/06C10N20/02C10N30/18C10N40/25
Inventor 陈晓伟梁宇翔阎欢贺景坚
Owner CHINA PETROLEUM & CHEM CORP
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