I believe that many car owners will find that the new car will not be installed with fenders now. Is this the car manufacturer secretly reducing the allocation? So, after buying a car, do we need to install fenders?
First, let's see what the fenders do?
No. Iyi, from this literal meaning, the fenders are used to resist the mud. Generally, in rainy weather, especially on muddy roads, there will be a lot of mud on the tires of the car, and sometimes on the body of the car. The fenders can effectively block the muddy water and sand particles driven by the car while driving, and prevent the muddy water from splashing on the body and when passengers get on and off the door, and stain their clothes.
In addition to the fenders behind the wheels, the fenders help keep the rear of the car clean to a certain extent. The particles and dirt carried by the wheels not only fly directly onto the fenders, but also part of them will be dragged by the airflow under the vehicle and reach the rear of the car, rolled up by the airflow vortex at the rear, and left behind. Car fart above Igu. Especially in hatchbacks, SUVs, and MPVs, mud and sand are more likely to be rolled up and left on the rear glass windows.
If the fender is not installed, it happens to be rainy weather when the car is running, especially the rear tires, like a water pump, the splashing water droplets will bring inconvenience to other pedestrians on the road.
Second, we know that if you don't pay attention when washing the car, use a high-pressure water spray gun to wash it or wipe it with a rag, the sediment on the body and the paint surface will "friction" and damage the paint surface of the car body. The fenders can reduce the adhesion of sediment to the body and avoid scratching the paint.
Since fenders have so many benefits, why are almost all new cars not equipped with fenders when they leave the factory? In fact, fenders have the following side effects:
1. Passability
The installation of fenders will affect the passability of the vehicle to a certain extent, especially for models with a relatively low chassis.
2. Increase aerodynamic resistance
Related studies have found that with fenders installed, the turbulence at the rear of the car will be greater than the original model, and the resistance will be greater.
When our car is driving at high speed, it will be subjected to very large air resistance. When our car speed exceeds 80km/h, the air resistance can account for about 60% of the total resistance of the car.
When the speed is faster, the resistance of the car will be faster, so in order to reduce the air resistance of our car, our car will be designed to be streamlined when developing the car, and the bottom of the car is also designed to be very flat. Let the air flow quickly, our drag coefficient will also be reduced a lot.
If the fenders are installed, it is equivalent to an increase of about 5% in total resistance. Assuming other conditions are the same, the fuel consumption will be 5% out of thin air, and it will also bring some additional "whoosh rustling" noise.
Therefore, the reason why today's cars do not install fenders is very reasonable in terms of performance.
3. It also has a little influence on whether the car will float or not.
Greater aerodynamic resistance also means that when driving at high speeds, the airflow will slow down and be blocked. According to Bernoulli's principle, the aerodynamic lift on the car will also become larger, and the car will feel easy to float when driving.
Some researchers have also done some experiments on a certain model. When the speed is 80 kilometers per hour, the aerodynamic lift of the car with fenders is increased by 57.1%. It wasn't enough to lift a car, but it felt a little floating.
So, should you install fenders or not?
If it is an SUV model, or you often run on bad roads, the fenders are still useful, which can reduce the accumulation of sediment on the body, but most of the time when driving in the city, it is a cement or asphalt road, the road condition is good, and the body is relatively clean , and it is an ordinary car, there is no need to install fenders.
