What is the principle of a shock absorber for automobiles?

When choosing a rubber shock absorber, it is first necessary to familiarize yourself with its characteristics, and then choose according to the natural environment. The rubber shock absorber is characterized by adjustable bending stiffness, large damping coefficient, large shear, compressive strength, compressive capacity, and very simple installation. The reason why rubber shock absorbers are so widely used is that it effectively uses the following characteristics of rubber:

1. Rubber has high elasticity and viscosity ductility; 2. Compared with steel, the elastic deformation of plastic is very large, and the elastic mold is not large; 3. The influence bending stiffness of rubber exceeds the dynamic bending stiffness, and the dynamic strength exceeds the static bending stiffness, which is conducive to reducing impact deformation and dynamic deformation; 4. The internal stress-strain curve diagram is an elliptical backward line, the total area is equivalent to the time of each vibration cycle converted into thermal vibration energy (damping), and the shape of the rubber can also be freely selected

In car suspension, shock absorbers are always used in conjunction with springs, and when we press down a corner of the body, it is the springs that are actually compressed, and the corresponding swing arm swings. When the car is released, the body should be the first under the spring force, and the shock absorber will play a damping role in the spring, that is, it tends to be stable after the first spring. If there is no shock absorber, the spring will be compressed again after **, which is manifested as the body tends to stabilize after many times**.

Therefore, the shock absorber is used to dampen the spring of the automobile suspension when it is the most important time.

The hydraulic shock absorber for automobiles is filled with special oil for shock absorbers, and the inside is divided into two cylinders: the oil reservoir cylinder and the working cylinder, and the piston divides the working cylinder into the upper chamber and the lower chamber. The piston is provided with an extension valve and a flow valve, which are used to control the flow of oil between the upper chamber and the lower chamber; The compression valve and compensation valve between the lower chamber of the working cylinder and the oil storage cylinder are used for the flow of oil between the lower chamber and the oil storage cylinder.

When the shock absorber is compressed, the piston goes down, the volume of the upper chamber increases, the volume of the lower chamber decreases, the flow valve opens, and the oil of the lower chamber enters the upper chamber through the flow valve; At the same time, a part of the oil opens the compression valve and enters the oil storage cylinder. The throttling effect of these two valves on the oil causes the shock absorber to have a damping effect during compressive movements.

When the shock absorber is elongated, the piston goes up, the volume of the upper chamber decreases and the volume of the lower chamber increases, the extension valve opens, and the oil of the upper chamber enters the lower chamber through the extension valve; At the same time, a part of the oil is opened to compensate and enters the lower cavity by the oil storage cylinder. The throttling effect of these two valves on the oil causes the shock absorber to have a damping effect when it is stretched in motion.

Because the spring force of the extension valve is greater than that of the flow valve, and the flow area of the valve hole of the extension valve is smaller than that of the flow valve, the damping force generated by the extension stroke of the shock absorber is greater than the damping force of the compression stroke, so as to meet the requirement of rapidly reducing the spring vibration.

The principle of automobile shock absorber is: the use of the resistance generated by oil flow to consume the energy of impact vibration, shock absorber can quickly attenuate the vibration generated by the car driving, improve the smoothness and stability of the car!

Hope it helps, hopefully!!

Use a spring to play a shock absorption effect,

The shock absorption of a car, first of all, I literally understand it is to filter or reduce vibration.

To use an analogy, the shoes you wear on your feet, if your soles are wooden, you can feel all the feedback power on the ground to your slopes when you wear them, and if you are given a pair of shock-absorbing foam shoes, your feet will feel very comfortable.

As another example, if your legs are straight when you jump from a height and are about to land, then your legs will definitely not be able to stand it, and if you are about to land, your legs are crankshafts.

Bend to the ground, and then stand up, at this time there will be very little damage to your legs.

Shock absorption is also based on this principle, but the shock absorption is generally through air or liquid and mechanical spring shock absorption, which can reduce the vibration of the ground to the vehicle, but the ride is more comfortable.

In other words, the main role of shock absorption is to filter the road, face the vibration of the vehicle, and make the driver and passengers more comfortable.

Shock absorption is also one of the important systems of a vehicle, it is installed between the body and the tires, that is, between the body and the walking system, the vibration generated by the tires and the ground screenshots, through the shock absorption to filter out some vibration frequencies, which not only protects the various parts of the body, but also provides a comfortable riding feeling.

It is also an important component of the value of the vehicle, especially the higher the grade of the car, the better the shock absorption effect, and the higher its cost, so it is close to the face.

In use, every maintenance should still pay attention to the maintenance of shock absorption.

Shock absorbers"The term is a common term within the automotive chassis industry, and an automotive shock absorber is actually a vibration damper. Shock absorbers are used not only in suspension but also in other locations in automobiles. For example, it is used in cabs, seats, steering wheels, etc., and can also be used as a buffer on vehicle bumpers.

In the suspension system, due to the vibration of the elastic element by the impact, in order to improve the smoothness of the car, the shock absorber is installed in parallel with the elastic element in the suspension, and the shock absorber is mostly a hydraulic shock absorber in the automobile suspension system, and its working principle is that when the frame (or body) and the axle are vibrated and there is a relative movement, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity flows into another cavity repeatedly from one cavity 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, so that the vibration energy of the automobile is converted into oil heat energy, and then absorbed and dissipated into the atmosphere by the shock absorber. When the cross-section of the oil channel and other factors are constant, the damping force increases and decreases with the relative motion speed between the frame and the axle (or wheel), and is related to the oil viscosity.

Shock absorbers and elastic elements are responsible for the task of slowing impact and damping vibration, and excessive damping force will deteriorate the elasticity of the suspension and even damage the shock absorber connections. Due to the contradiction between the elastic element and the shock absorber, it is necessary to adjust the surface.

Detection method. 1.Make the car stop after driving 10km on the road surface with poor road conditions, touch the shock absorber shell with your hands, if it is not hot enough, it means that there is no resistance inside the shock absorber, and the shock absorber does not work.

At this time, you can add appropriate lubricating oil, and then test, if the shell is hot, it is a lack of oil inside the shock absorber, and sufficient oil should be added; Otherwise, the shock absorber has failed.

2.Press the bumper firmly and then release, if the car has 2 or 3 jumps, the shock absorber is working well.

3.When the car is driving slowly and braking urgently, if the car vibrates violently, it means that there is a problem with the shock absorber.

4.Remove the shock absorber to stand upright, and clamp the lower end connecting ring on the vice, pull and press the damping rod several times, at this time there should be stable resistance, and the resistance of pulling up (recovery) should be greater than the resistance when pressing down, if the resistance is unstable or there is no resistance, it may be that the internal oil of the shock absorber or the valve parts are damaged, and the parts should be repaired or replaced.

1. The role of automobile shock absorber: the shock absorber can make the vehicle run smoothly, and the shock absorber has the effect of cushioning vibration. Nowadays, the shock absorbers of many cars are hydraulic shock absorbers;

2. The principle is to fill a cylinder with a small hole and a piston filled with pressure oil, when the spring vibrates, the oil will be forced to flow through the small hole, so the effect is limited;

3. The size of the diameter of the small hole determines the size of the limit. If the diameter of the small hole is small, there is a strong limitation, and the stability of the car will be higher; On the contrary, the car feels more comfortable. The size of the small hole diameter should be designed with stability and comfort in mind.

The role of shock absorbers.

Automobile shock absorber is a very important part of the suspension system, its main function is to suppress the spring to absorb vibration deformation and spring **, while absorbing the impact force from the road surface. When the vehicle is driven on uneven surfaces, the wheels are subjected to the impact force from the ground and transmitted to the body through the springs in the suspension system, causing the body to vibrate. The spring continues to expand and contract, absorb the force of ** and quickly stabilize, so that the passengers in the car can feel comfortable and stable.

Consequences of damper damage.

When the shock absorber is broken and fails, the vehicle will inevitably produce bumps when passing through the bumpy road, and the amplitude of vibration is large, which directly reduces the comfort of the driver and passengers in the car. If the shock absorber is damaged, it will also cause the wheels to leave the ground when the vehicle is cornering, and it is easy to roll over or lose control.

So how can we tell if the shock absorber is damaged? If the shock absorber housing is cool after driving on rough roads, it is proof that it is no longer working and has been damaged. Automobile shock absorbers are very important parts, and if they are found to be damaged, they must be repaired in time.

The function of the shock absorber is to suppress the impact from the road surface after the spring is absorbed. Shock absorber is used in automobiles, in order to accelerate the attenuation of frame and body vibration, in order to improve the driving smoothness of the car, when passing through uneven roads, the shock absorbing spring can filter the vibration of the road surface, and the spring itself will have reciprocating motion, and the shock absorber is used to suppress the spring jump.

The principle of the shock absorber is: when the vibration between the frame and the axle and the relative motion occurs, the piston in the shock absorber moves up and down, and the oil in the shock absorber cavity repeatedly flows into another cavity from one cavity through different pores, and the friction between the hole wall and the oil and the internal friction between the oil molecules form resistance to the vibration, so that the vibration energy of the car is converted into oil heat energy, and then absorbed and dissipated into the atmosphere by the shock absorber.

What is the role of the car shock absorber?

The shock absorber inhibits the spring to absorb the vibration deformation and the spring **, the impact force of the road on the vehicle is absorbed by the shock absorber, reducing the vibration strength of the vehicle, and in the whole process, the extension and compression of the spring occurs under a certain inertia.

The shock absorber is used to cushion this effect, delay the speed of spring extension and compression, the shock absorber absorbs the first force, and the spring deformation recovers its function after the stable extension and compression tend to a stable working state, so that the passengers feel comfortable and reduce the fierce feeling, which is the performance of the normal operation of the shock absorber.

What are the symptoms of a broken shock absorber?

1. Ride experience.

When the shock absorber can not work normally, the vehicle is of course bumpy in the uneven place after the pothole, driving such a road section will soon make people motion sickness, bumps will make some people really not enjoy, just like falling into a big pit, the vibration amplitude of the car body has increased, the hard vibration, the feeling that the little heart is going to jump out, the comfort in the car is gone, and it has become a masochistic state, which is obviously the feeling of crossing the mountain.

Explain that the shock absorber function has failed, avoid potholes, find a flat place on the road surface, and solve the shock absorber problem of the car first.

2. Abnormal temperature.

When you experience a rough road, detect the shock absorber, you can directly feel the temperature of the shock absorber with your hands, a certain shell of the shock absorber feels very cold, it means that the shock absorber has been damaged, not involved in the work, it is normal to feel that the shell is hot, the shock absorber is to drive with heat to emit this part of the heat, the heat is the body vibration and the mechanical energy of the wheels are converted into heat energy, to achieve the purpose of shock absorption.

3. Oil leakage. When the shock absorber is working, due to the oil mist evaporated by the high-temperature oil, it is often attached to the cylinder wall, and with the driving of the vehicle, the oil mist is adhered to the dust brought up by the wheels to form a layer of oil sludge, which is very realistic and normalized.

However, if the hydraulic oil inside the shock absorber has oil stains or oil droplets on the cylinder wall and lower lifting ring of the shock absorber, or escapes from the piston rod, it means that the shock absorber has leaked and failed, which is not normal.

The function of the automobile shock absorber is to reduce the force of the bump through the shock absorber when the car encounters bumps, so that the car runs more smoothly and gently, of course, the shock absorber can also effectively avoid injuries and damage to the car when it is subjected to strong force, and the passengers can also reduce the bump feeling in it.

The role of automobile shock absorbers. Filter the impact of bumpy road surface to vehicles, and cushion the resonance caused by road surface vehicles. Protects the frame while also enhancing the driver and occupant experience.

If there is no shock absorber cushioning, the link parts of the body, whether welded, riveted or screwed, will quickly loosen, and the driver and passengers will be very uncomfortable (see the driver of a tractor in the countryside). Therefore, shock absorbers can effectively prolong the life of the whole vehicle and improve the comfort of drivers and passengers.

The shock absorber can absorb the impact of the road surface, quickly absorb the vibration generated by the bump, and return the vehicle to normal driving state. When passing over uneven roads, although the shock absorbing spring can filter the vibration of the road surface, the spring itself will also have reciprocating motion, and the shock absorber is used to suppress this spring jump.

Shock absorbers can make the car ride smoothly, shock absorbers have the effect of cushioning shocks, if the suspension is missing, the car will run unbalanced and will shake. In addition, the shock absorber is a vulnerable part in the process of car use, and the working quality of the shock absorber will directly affect the smoothness of the car and the life of other parts, so the shock absorber should always be in good working condition.