Rear bar lower trim plate.
In aerodynamics, there is a theory proved by the French physicist Bernouil: 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.
Process analysis of automobile baffle
The original process involved manually drilling holes into metal plates, which was too inefficient and costly to produce on a large scale. 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. The rear bumper deflector, also known as the rear bumper lower guard, is a black plastic plate installed under the rear bumper of a car. Its main role is to improve the aerodynamic performance of the vehicle, improve the stability and driving safety of the vehicle.
First of all, the rear bumper deflector can reduce the airflow resistance generated by the vehicle during driving and reduce the impact of air resistance on the vehicle, thereby improving the driving stability and fuel economy of the vehicle. Secondly, it can also prevent the rear bumper from being damaged by road debris or water splashing on the body, protecting the integrity and aesthetics of the body. In addition, the rear bumper deflector can also play a role in reducing wind resistance noise and improving the silence effect in the car.
When installing the rear bumper baffle, it should be selected according to the model and actual situation. The shape and size of the rear bumper baffle are different in different models, so it is necessary to select a suitable rear bumper baffle for installation. At the same time, when installing the rear bumper baffle, attention should be paid to fixing it firmly to avoid loosening or falling off.
In short, although the rear bumper deflector looks insignificant, its role can not be ignored. It can improve the aerodynamic performance of the vehicle, protect the body, reduce noise, and make driving more comfortable and safe. Therefore, for the owner, the installation of the rear bumper deflector is very necessary.
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