Car suspension – part 2
Active – Electronic controlled Suspension
In active suspension controlled electromagnetic valves alter the degree of damping depending on the data gathered by various sensors and a central processing unit computing. The sensors measure various parameters (twist the steering wheel, vertical and lateral accelerations, and the vehicle position on the road). These in conjunction with the pneumatic chambers (instead of springs) and shock absorbers, with electronically controlled hardness depending on traffic conditions, in theory they continuously adjusts the behavior of the vehicle depending on the road and the intentions of the driver, since the hardness can be adjusted manually, without compromising on comfort and grip margins.
When the wheel encounters an obstacle, the spring that usually surrounds the shock is compressed faster. The shock absorber ensures that the oscillation of the spring remains controlled in order to avoid the occurrence of unwanted behavior effects in the body.
The second role of the shock absorber is comfort. In collaboration with the spring absorbs the energy generated by the contact with the bumps and transfers the frame and the passenger lower vibration rate. The proper operation and harmonious cooperation with springs improves weight distribution and braking distance. The function of the shock absorber is seemingly simple.
More specifically, the inside of the shock absorber consists of a main component in the form of small and different cylinder chambers which are separated by perforations. When the car is moving slowly and meets some anomaly, the shock absorber moves relatively slowly upwards. Thus there is little liquid flow rate (volume of liquid per unit time) and therefore reduced friction and thus reduced resistivity. As the speed increases, the greater amount of liquid is moving, increasing the resistances. The friction during the passage of the liquid through the holes provides damping, converting the kinetic energy into heat.
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