Deflector.
In order to reduce the lift generated by the car at high speed, the car designer has made improvements in the appearance of the car, tilting the body as a whole forward and down to produce downward pressure on the front wheel, changing the tail to a short flat, reducing the negative air pressure acting from the roof to the rear to prevent the rear wheel from floating, and also installing a downward inclined connection plate under the front bumper of the car. The connecting plate is integrated with the front skirt of the body, and a suitable air inlet is opened in the middle to increase the airflow and reduce the air pressure under the car.
In terms of aerodynamics, there is a theory proved by the French physicist Bernouille: the speed of air flow is inversely proportional to the pressure. In other words, the faster the air flow rate, the lower the pressure; The slower the air flow, the greater the pressure. For example, the wings of an airplane are parabolic in shape and the airflow is faster. The underside is smooth, the airflow is slower, and the underside pressure is greater than the upside pressure, creating lift. If the car appearance and wing cross-section shape is similar, in high-speed driving due to the different air pressure on the upper and lower sides of the body, the lower the small, this pressure difference will inevitably produce a lifting force, the faster the speed of the greater the pressure difference, the greater the lifting force. This lifting force is also a kind of air resistance, the automotive engineering industry is called induced resistance, accounting for about 7% of the vehicle air resistance, although the proportion is small, but the harm is great. Other air resistance only consumes the power of the car, this resistance not only consumes power, but also produces a bearing force that endangers the safety of the car. Because when the car speed reaches a certain value, the lift force will overcome the car weight and lift the car up, reducing the adhesion between the wheels and the ground, making the car float, resulting in poor driving stability. In order to reduce the lift generated by the car at high speed and reduce the air pressure under the car, the car needs to install a deflector.
The original process is to manually drill holes in the metal plate, which is too low efficiency, high cost and difficult to large-scale production. The blanking and punching scheme can improve the production efficiency and quality and reduce the cost. Due to the small hole distance of the parts, the sheet material is easy to bend and deform when punching, and in order to ensure the strength of the working parts of the mold, the qualified parts are punched at different times. Due to the large number of holes, in order to reduce the punching force, the process mold adopts high and low cutting edge.
How to repair the front bar baffle in general
In the process of automobile maintenance, the maintenance of the lower baffle of the front bumper is a very common problem.
The role of the deflector is to let the air flow evenly in the front of the body to reduce the resistance of the vehicle and improve the driving stability. If the baffle is damaged, it needs to be repaired or replaced in time.
If it is only a slight scratch, you can choose to go to the garage for spray painting repair, the cost is generally about two or three hundred yuan.
If you need to replace the front bumper lower deflector, you can consider taking insurance to achieve compensation. However, if the disassembly price of the baffle is low, you can also choose not to take insurance, so as not to waste the number of insurance.
It should be noted that replacing the front bumper lower deflector requires opening the front hood, finding the location and removing the fender, and then selecting the appropriate tool for removal according to the actual situation.
When replacing the lower baffle of the front bumper, check the installation position and fixing method of the baffle to ensure that it is installed correctly. If you are not familiar with the operation, it is recommended to seek the help of professional technicians.
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