What's wrong with cars drifting on the highway?

What's wrong with cars drifting on the highway?

Owner:

"Some time ago, I encountered a situation where the car was unstable and still swayed from side to side on the expressway. It was raining and windy. I thought it was the weather, so I reduced the speed to 80 and didn't care too much.

Later, I went to the 4S shop for maintenance. The master checked the tires of the car and said that the tires were seriously worn and aging, and the tread of one tire was particularly cracked! If you don't change it quickly, there will be a danger of puncture at any time, and at high speed, the tire noise will be much louder than before, the stability will be abnormal, and there will be problems of "floating" or jitter.

Only then did I know that I encountered the problem of car drift on the expressway a few days ago. I feel scared when I think about it now. At that time, there was going to be a flat tire on the expressway, and the consequences were really unimaginable. "

Many old drivers should have had this experience: when driving on the highway, the car will go straight unsteadily, the direction control will be reduced, the speed will be slightly higher, and the car will shake, which is what everyone often says. The reason why the vehicle floats shows that the stability of the vehicle body is poor, and at the same time, with the acceleration of vehicle speed, the situation of vehicle floating is more serious. If you are not careful, the vehicle may get out of control and even endanger your life! Today, Xiao An will show you some common sense and precautions of car drift.

Under what circumstances will the car float?

When the vehicle is driving at a high speed

When the car is driving at high speed, the air resistance will become larger, and the driving power of the car will be more affected by the air. For some vehicles with unsmooth appearance, large lateral area and high center of gravity, when there is a big wind direction change and sudden crosswind, it is easy to cause the vehicle's driving path to suddenly deviate, thus causing instability.

When driving out of the valley and tunnel

When the car leaves the tunnel and valley, the wind speed often reaches more than ten times of the surrounding wind speed, and the rapidly changing airflow is easy to make the car unstable. In addition, when driving in mountainous areas, seaside and riverside, it is also vulnerable to sudden strong crosswind attacks. In these cases, for the safety of people and cars, let's slow down.

When overtaking a large vehicle

When passing through a large vehicle, the distance between the two vehicles is very close, the air velocity increases and the air pressure decreases, which will produce a certain suction. Due to the light weight and narrow tires of the family car, the influence of suction will be more obvious, and it will be attracted to the big car, which is prone to shaking for a short time.

What is the cause of car drift?

Many car owners will think that the suspension of the car is related to the light weight of the car body. The heavier the car body, the better the stability of the car at high speed. This can't be said to be wrong, because the light weight of the car body does cause the car to float, but the two have little to do with it. There are many reasons why cars float. Let's take a look together.

Tire grip

The smaller the grip of the tire on the ground, the worse the stability of the vehicle and the more obvious the subjective feeling of drift. Tire grip is mainly determined by tire formula, tread design and tread width. Generally speaking, wider and softer tires can provide better grip, which can also provide better stability when driving at high speed and turning. So it is very important to choose a good tire.

Field suspension is too soft.

Automobile suspension is divided into soft suspension and hard suspension. Among them, the hard-mounted car can keep the car stable and unlikely to float when driving, whether in urban areas or at high speed. When a car with soft suspension is driving at high speed, if it encounters strong wind, the reaction will be more intense, and it will take a lot of energy to restore the stability of the car, so it will float.

Body center of gravity structure

"The more stable the car weight, the lighter the car floats" is the experience summarized by many old drivers. There may be a connection between the two, but the actual effect is not obvious. The real key depends on the height of the center of gravity and the structural design of the car body. For example, the lower chassis design of a racing car is to obtain better handling and stability and further lower the center of gravity of the car body, so that the car will not "float" easily.

What if the car drifts?

In this case, the first thing to do is to hold the steering wheel tightly, control the speed, stabilize the direction, and keep the vehicle in a continuous and stable state. Of course, it is very important to check the tire pressure at ordinary times. It is necessary to keep the tire pressure appropriate, neither too high nor too low. In addition, the tail wing can be installed to change the direction of airflow, so that the tail airflow can generate downward pressure and improve the ji limit of hair drift.

If the car often floats, or it is difficult to control the car when it floats, it may be that there is something wrong with the parts of the car. In this case, it should be sent for inspection and maintenance in time.

What I want to say is that drivers can't float whether the car floats or not. It is very important to avoid speeding, obey traffic rules and drive safely!