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Lubricating fluid

a technology of lubricating fluid and lubricating agent, which is applied in the direction of lubricant composition, base materials, additives, etc., can solve the problems of destroying the bounce of the wheel, and achieve the effect of good low temperature viscosity and good shear stability

Inactive Publication Date: 2020-10-15
SHELL OIL CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent text describes how to make lubricating fluids that can serve as shock absorber fluids. This is done by combining a GTL base oil, alkylbenzene or alkylnaphthalene, and a viscosity modifier. This combination has good shear stability and low temperature viscosity.

Problems solved by technology

The shock absorber, along with hysteresis in for instance the tyres of the wheel, dampens the motion of the unsprung weight up and down, thereby effectively damping the wheel bounce.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example

[0029]A shock absorber fluid (Example 1) was prepared having the formulation shown in table 1:

TABLE 1ComponentAmount (wt %)GTL 4 base oil10.00GTL 3 base oil68.18Alkylbenzene15.00VI improver6.00Additive package for shock0.75absorber fluid (containsdispersants, detergents, anti-wear additives, anti-oxidants)Ashless antiwear additive0.05Low-silicon Antifoam0.02

Both GTL base oils are available from Shell. The GTL 4 base oil had a viscosity at 100° C. (measured by ASTM D445) of between 3.80 and 4.20 cSt. The GTL 3 base oil had a viscosity at 100° C. (measured by ASTM D445) of 2.8 cSt. The alkylbenzene was a mixture of mono-substituted alkylbenzenes having a kinematic viscosity at 40° C. of between 3 and 5 mm2 / s. The fluid was prepared by mixing and heating of all the components until a homogeneous mixture resulted.

Testing

[0030]The shock absorber fluid of Example 1 and two commercial shock absorber fluids (Comparative Example 1 and Comparative Example 2) were tested. Table 2 shows the pro...

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Abstract

A lubricating fluid suitable for use as a shock absorber fluid is disclosed. The lubricating fluid comprises at least 40 wt %, based upon the weight of the lubricating fluid, of a GTL base oil, has a viscosity index in the range of from 50 to 1000, and a pour point of below −30° C.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a lubricating fluid which is suitably used as shock absorber fluid. The present invention further relates to the use of the lubricating fluid in a shock absorber.BACKGROUND OF THE INVENTION[0002]A shock absorber (sometimes referred to as a damper) is a mechanical device designed to smooth out or damp a sudden shock impulse and dissipate kinetic energy. Shock absorbers are an important part of automobile, motorbike or bicycle suspensions, aircraft landing gear, train suspensions, and the supports for many industrial machines. Large shock absorbers are also used in architecture and civil engineering to reduce the susceptibility of structures to earthquake damage and resonance.[0003]Shock absorbers convert kinetic energy to heat energy, which can then be dissipated. Hydraulic shock absorbers are composed of a cylinder with a sliding piston inside. The cylinder is filled with a shock absorber fluid. This fluid-filled piston / cy...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C10M169/04C10M105/06C10M111/02C10M137/10C10M133/54C10M141/10
CPCC10M2223/047C10M2203/003C10M2205/173C10M2209/084C10M2203/065C10N2030/02C10N2040/08C10M2215/26C10M111/04C10M169/04C10M169/044C10N2040/02C10M2203/1025C10M2203/06C10N2030/68C10N2020/02C10M169/041C10M171/02C10M2205/026C10M2205/028C10M2205/04C10M2223/045C10M2229/02C10M2205/06C10M2215/042C10N2030/08C10M111/02
Inventor RAN, LIXINWANG, XISMITH, PETER WILLIAM ROBERT
Owner SHELL OIL CO
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