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)

COUNTRYMAN JCW introduce

MINI has officially announced the guide prices for the entire lineup of the all-new MINIJOHN COOPER WORKS. The new car offers a total of 6 models in 3 series, with a price range of 35500-456000 yuan. The specific prices of each model are shown in the table below: the new car has a more aggressive appearance compared to the old model, with outstanding LED headlights as standard. The JCW logo on the side of the car also constantly reminds that this is not an ordinary MINI model. In terms of the rear of the car, Its dual sided layout is the same as the MINI COUNTRYMAN COOPER S. The new car is built on the latest UKL1 platform, and there is also the MINI CLUBMAN on the same platform. The body size of the new car has been improved compared to the old model. The black interior is still full of MINI style, paired with red stitching and sports seats with a strong fighting atmosphere. The 6.5-inch multifunctional screen is standard across the entire series, and if you find it too small, you can also choose to install an 8.8-inch large-sized screen. In terms of power, It is equipped with a 2.0T turbocharged engine, with a maximum power of 170kW and a maximum torque of 350Nm. In terms of transmission, it adopts a 6MT or 8AT gearbox, and the driving form adopts front four-wheel drive