In order to rapidly attenuate the vibration of the frame and the body and improve the ride comfort and comfort of the car, shock absorbers are generally installed on the vehicle suspension system. At present, the double-acting cylinder shock absorbers are widely used in automobiles.
Shock absorbers are vulnerable parts in the process of automobile use. The shock absorbers work well and will directly affect the smooth running of the car and the life of other parts. Therefore, we should make the shock absorbers always in good working condition. The following methods are used to verify that the shock absorber is working properly.
The car shock absorber is actually composed of two parts: a spring; a damping cylinder. Spring everyone knows, damping cylinder is used to do what? Shock absorber structure is so simple, but also need to take care of it?
First, the role of shock absorbers
Automobile shock absorbers can quickly attenuate the vibration of the frame and body while the car is running, improving the smoothness and comfort of the car. In short, it is used to absorb vibration and stabilize the body.
The spring is used to maintain the height of the car and act as a buffer when jolting. But if only the spring will not be more comfortable? It is not. If there is only a spring, after the vehicle has bumped, the body will jump up and down like a spring toy. Therefore, it is necessary to cooperate with the damping cylinder to control the effect of spring compression and rebound.
Therefore, the mutual cooperation of the spring and the damping cylinder can determine the softness and stiffness of the suspension of a vehicle; and the control balance of comfort and movement is the difficulty in tuning the shock absorber. In the luxury models, electronically adjustable shock absorbers are usually used so that the stiffness of the suspension can be adjusted at any time depending on the road surface. Obsessed with sports driving fans, they will modify their own shock absorber system to make the car lower and harder, further improving handling.
Second, why car shock absorber maintenance
Whether the shock absorber is a consumable part or whether it depends on the road conditions. If it is bumpy, the shock absorber will do stretching exercise at a high frequency, and the temperature of the oil in the shock absorber will gradually increase, which is not conducive to long-term use of the shock absorber.
Because the shock absorber works well, it will directly affect the smooth running of the car and the life of other parts, or the occurrence of oil seal gaskets, sealing gasket crack damage, the loose nut of the fuel tank cover nut, or the appearance of shock absorbers and steel plate Collisions between springs, frames, or shafts, or signs of oil leaks. If it is an oil spill, it is undoubtedly very dangerous.
Therefore, we should keep the shock absorber in good working condition. Regular inspection and maintenance is a detail control problem.
What are the symptoms of broken car shock absorbers?
1. Make the car park on a road with poor road conditions for 10 kilometers and stop. Touch the damper shell. If it is not hot enough, there is no resistance inside the shock absorber. The shock absorber does not work. At this point, you can add appropriate lubricants, and then test, if the shell is hot, it is the lack of oil within the shock absorber, should add enough oil, otherwise, indicating that the shock absorber failure.
2. Press the bumper firmly and release it. If the car does not jump more than once or twice, the shock absorber works well. If you keep standing up and down, looking very flexible, it will be bad.
3, when the car is running slowly and emergency braking, if the car is relatively violent vibration, indicating that there is a problem with the shock absorber.
4, remove the shock absorber to stand upright, and the lower end of the connecting ring clamped on the vise, pull the pressure shock rod several times, this time there should be a stable resistance, pull up to restore the resistance should be greater than the downward pressure Resistance at the time, such as unstable or no resistance, may be due to lack of oil inside the shock absorber or damage to the valve parts. Repair or replacement of parts should be performed.
Third, how much to change the shock absorber
1. Dual-tube inflatable shock absorbers for ordinary cars are generally 100-200 yuan, and 100 or so for mini-cars, or even lower. In addition, front shock absorbers are generally less expensive than rear shock absorbers. For example, a set of FAW-made Toyota Corolla sedan shock absorber ex-factory price of 700 yuan.
2. SP parts sold by auto factories are naturally higher than ex-factory prices. This piece is also a large source of profits for auto factories. For example, in the 4S shop, Audi A6 shock absorbers, a price of nearly two thousand, the original factory parts is Monroe, Belgium. Of course, you can also go for other manufacturers, the price will be a lot cheaper, such as FAW Donggonggonggong.
3, the price of different types of shock absorbers is also different. Crown uses a single cylinder inflatable shock absorber, the price is higher than the ordinary double cylinder inflatable shock absorber. Some C-class vehicles also use damping force adjustable shock absorbers, electromagnetic shock absorbers, etc., the price will be higher.
When do cars need to replace shock absorbers?
In general, shock absorbers that are loud, too soft, and have oil leaks must be considered for replacement. However, when discovering the above problems, do not judge the replacement of the shock absorber prematurely. If there is noise, check whether it is installed correctly; if it is too hard or too soft, check whether there is any problem with the spring and fixed damper parts; if the oil leaks, check whether the fuel tank cover is Fasten.
Automobile assembly net tips: The shock absorber will produce audible faults during actual use. This is mainly due to collision of the shock absorber with the leaf spring, frame or shaft, damage or detachment of the rubber pad, and deformation of the shock absorber dust cap. If it is caused by lack of oil, etc., the cause should be ascertained and repaired.
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