Regarding the question you asked, the function of the automobile tail wing is to make the air resistance form downward pressure when the automobile is driving at high speed, offset the lift as much as possible, effectively control the downward pressure of the airflow, and correspondingly reduce the drag coefficient. If the tail wing is installed, the air drag coefficient can be reduced by 20%, but the fuel consumption is not obviously reduced when driving on general roads; On expressway, when driving at the speed of 120km/h, it can save fuel by 14%. At this time, the role of the rear of the car is obvious.
At present, according to the domestic traffic laws and regulations, there is generally a speed limit in expressway. If you don't run at high speed for a long time, it is meaningless to install the tail. Moreover, after installing the tail wing, the annual inspection of the vehicle is still a problem. Therefore, it is recommended that you do not install.
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