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Briefing
The everyday practice shows that auto vehicles having the suspension based on regular shock absorvers develop significant changes in comfort level and adherence a extreme temperatures, especially in winter. In a temperate-continental climate, initial temperatures of -15 deg. Celsius to -10 deg. Celsius in cold season and 60 - 80 deg. Celsius during the summer, measured on the shock absorbers, are quite common.
Consequently, we determined from diagrams F = f(d) the maximal forces within the shock absorbers at various temperatures and various speeds of the piston rod, resulting families of diagrams F = f(d).
Experiments conducted at the same speed of the piston rod lead to the following conclusions:
- there are significant differences, of over 80%, between forces determined at ambient normal temperature of 20 deg. Celsius and forces determined at extreme low temperatures;
- the differences between forces determined at extreme high temperatures and those at ambient temperature are up to 30%.
The results of these experiments performed on various types of shock absorbers are shown in drawings 1, 2 and 3, as families of diagrams F = f(d), built at extreme temperatures.
The problem: when using common shock absorbers, temperature affects both comfort level and rolling safety.
Our solution: we have designed and experimented a new constructive solution of shock absorbers for vehicle suspension, at costs comparable to that of common shock absorbers. The new product address the following unsolved issues of the presently marketed absorbers:
- maintains the same functional characteristics it was designed for, within a temperature range of -40 to 90 deg. Celsius;
- superior fiability compared to classical shock absorbers: the product we propose can eliminate transversal forces within the fixings and compensates the wearing of the sealing elements;
- possibility of automatic adjustment of its features, for vehicles with significant difference between minimal and maximal load.
The characteristics of the new shock absorber are:
- automatic adjustment system of the shock absorbing force depending on the temperature;
- a special system that allows adjustment of the shock absorbing force from the exterior, or from the car board, according to the rolling conditions and the load of the car;
- due to a new improved system of connecting the absorber to the vehicle, the transversal forces upon the device can be fully eliminated;
- ensures self-compensation of the wearing on the sealing elements and the guidance of the piston rod.
Drawing 4 and drawing 5 present the curves F = f(v) for the new shock absorber, experimentally determined at extreme temperatures. The forces determined at the same speed but at ambient and extreme temperatures differ by less than 10%.
Theoretically and practically, we can build new shock absorbers for car suspensions with decreased maximal shock absorbing forces at low temperatures than maximal forces measured at high temperatures.
Associated drawings and graphics:
Drawing 1 - Shock absorber manufactured within the EU: Elongation diagram
Drawing 2 - Shock absorber manufactured witin the EU: Compression diagram
Drawing 3 - Shock absorber manufactured in Romania: Elongation diagram
Drawing 4 - Shock absorber on new concept: Elongation diagram
Drawing 5 - Shock absorber on new concept: Compression diagram
Important note! The product briefly presented above makes the subject of a registered patent under international law.
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