Suspension system vibration due to the elastic element by the impact, in order to improve the vehicle ride comfort, suspension and the elastic element are arranged in parallel for the attenuation of vibration, shock absorber, suspension shock absorber is used in the hydraulic shock absorber, its working principle is when the frame (or body) and the bridge between motion and relative motion within the damper, the piston moves up and down, the oil shock absorber cavity will be repeated from one cavity with different pore flow into another chamber. The hole wall and the friction between oil and oil internal friction between the molecules of vibration damping force, so that the automobile vibration energy is converted into heat energy is absorbed by the oil, then the shock absorber and emitted into the atmosphere. In the same oil channel section and factors such as time, damping force with the frame and axle (or wheel) or the relative velocity between, and with oil viscosity [1].
Shock absorber and the elastic elements bear the corrosion impact and shock task, the damping force is too large, will make the suspension elastic deteriorate, even make the shock absorber connecting parts damaged. Therefore to this contradiction adjusting springs and shock absorbers.
(1) in the compression stroke (vehicle axle and frame close to each other), shock absorber damping force is small, so as to give full play to the role of elasticity of elastic element, mitigate the impact. Then, the elastic element plays the major role.
(2) in the suspension extension stroke (axle and frame away from each other), shock absorber damping force should be large, rapid damping.
(3) when the axle (or wheel axle) and the relative velocity between the too big, demand shock absorber can automatically increase the liquid flow, so that the damping force is always maintained within certain limits, in order to avoid too much to bear the impact load.
In automobile suspension system widely used in the absorber, and in the compression and expansion stroke can play a damping effect is double action shock absorber, and the use of new shock absorber, which comprises a pneumatic shock absorber and resistance adjustable shock absorber.
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Post time: May-09-2017