Shock absorber oil performance and usage
Published Time:
2023-08-05 09:39
Source:
The length of time a motorcycle is used and the ambient temperature during use vary. Therefore, to adapt to the various climatic conditions of the motorcycle's operating region, since most shock absorbers absorb impact and vibration energy through the flow damping force of the oil and convert it into heat dissipated by the oil, the damping force is closely related to the viscosity of the oil, and the viscosity of the oil varies with temperature.
The following technical requirements are put forward for shock absorber oil:
（ 1) Shock absorber oil must have good rust prevention and anti-wear properties;
（ 2) Shock absorber oil should have as little vaporization loss as possible within the entire operating range of the motorcycle (including high-speed, full-load, and overloaded driving), that is, so-called low vaporization performance;
（ 3) When shock absorber oil comes into contact with air, it must have antioxidant stability and oil-gas mixture stability, that is, so-called good operating stability;
（ 4) The pour point of shock absorber oil used in China must not be lower than -40℃. That is to say, when the temperature drops to 0℃～-40℃ in the severe winter, the oil should not lose its fluidity;
（ 5) Because shock absorber oil containing impurities will quickly scratch the piston rod or cause defects in the oil seal edge during motorcycle driving, resulting in oil leakage. Therefore, the shock absorber oil must be kept absolutely clean;
（ 6) Shock absorber oil must not only have good viscosity-temperature performance and a high viscosity index, but also a low pour point. When the ambient temperature changes or the oil temperature changes with the extension of the working time, the viscosity change of the oil should be very small.
In summary, the viscosity of the shock absorber oil has a great influence on the performance of the shock absorber. If the oil is too viscous, the soft shock absorber will become hard, and if the oil is too thin, the hard shock absorber will become soft. In order to change the damping performance of the shock absorber, the grade of the shock absorber oil can be changed, but the amount of oil added must not be arbitrarily increased or decreased.
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