Front shock absorber assembly introduce

Shock absorbers are mainly used to suppress the oscillation and impact from the road surface when the spring rebounds after absorbing vibration. When passing through uneven roads, although the absorbing spring can filter out the vibration of the road surface, the spring itself still has reciprocating motion, and shock absorbers are used to suppress this type of spring jumping. If the shock absorber is too soft, the body will jump up and down, and if the shock absorber is too hard, it will bring too much resistance, Obstructing the normal operation of springs. In the process of modifying the suspension system, hard shock absorbers need to be matched with hard springs, and the hardness of the springs is closely related to the weight of the vehicle. Therefore, heavier vehicles generally use harder shock absorbers. The device connected to the shock-absorbing crankshaft is used to counteract the torsional vibration of the crankshaft (i.e. the phenomenon of the crankshaft twisting due to the impact force of cylinder ignition). In the suspension system, vibration is generated due to the impact of elastic components, To improve the smoothness of car driving, shock absorbers are installed in parallel with elastic components in the suspension system. To attenuate vibration, hydraulic shock absorbers are commonly used in car suspension systems. Their working principle is that when relative motion occurs due to vibration between the frame (or body) and the axle, the piston inside the shock absorber moves up and down, The oil in the shock absorber chamber repeatedly flows into another chamber through different pores. At this time, the friction between the hole wall and the oil and the internal friction between the oil molecules form a damping force on the vibration, converting the vibration energy of the car into oil thermal energy, which is then absorbed and dissipated into the atmosphere by the shock absorber. When the cross-sectional area and other factors of the oil channel remain unchanged, the damping force increases or decreases with the relative motion speed between the frame and the axle (or wheel), And it is related to the viscosity of the oil [1]. Shock absorbers and elastic components bear the task of cushioning and shock absorption. If the damping force is too large, it will cause the suspension elasticity to deteriorate, and even damage the shock absorber connecting parts. Therefore, it is necessary to adjust the contradiction between elastic components and shock absorbers (1) During the compression stroke (when the axle and frame are close to each other), the damping force of the shock absorber is relatively small, in order to fully exert the elastic effect of the elastic element and alleviate the impact. At this time, the elastic element plays the main role (2) During the suspension extension stroke (the axle and frame are far away from each other), the damping force of the shock absorber should be large and quickly absorb shock (3) When the relative speed between the axle (or wheel) and the axle is too high, it is required that the shock absorber can automatically increase the fluid flow rate to maintain the damping force within a certain limit, in order to avoid bearing excessive impact loads. Tubular shock absorbers are widely used in automotive suspension systems, and they can provide shock absorption in both compression and extension strokes, which is called bidirectional shock absorbers. New shock absorbers are also used, It includes inflatable shock absorbers and resistance adjustable shock absorbers)

Audi TT introduce

The Audi TT is a sports car developed by Audi, which was first launched in 1998. As a sports sedan, the TT model has achieved great success in the market with its almost identical beautiful appearance and excellent performance to the concept car version. In the early stages of the first generation, some car owners complained about unstable high-speed turning and accidents. Audi adjusted the suspension system of the TT and added a rear spoiler version to the rear of the car, reducing the lift at the rear of the Audi TT from 148 pounds to 53 pounds at a speed of 125 miles per hour, The 64 pound rear lift of the BMW Z3 Coupe and the 68 pound Porsche Boxster, as well as the 104 pound Mercedes SLK, are lower than those of the same period at the same speed. The Audi TT is a pure sports car. There are three models sold in China, namely the TT Coupe 1.8t, TT 2.0TSI, and TT 3.2quattro convertible (soft top). Audi continues to launch a series of completely new cars, from A4.A6 to the current A8 and TT. [2] Audi TT's competitors include BMW X1, Mercedes SLK, etc