What is the plastic panel under the car called?

[Marques]

Automobile front bumper under the plastic panel called automobile front spoiler. The following is the relevant information: deflector: when the air flow in the bottom of the car, the rear lower deflector can be the high-speed low-pressure air flow in the bottom of the car into the rear of the car to expand its scope, in this process the speed of the air flow drops sharply, the bottom of the car's low-pressure air flow will be due to the roof of the air flow pressure is relatively high and produce downforce, and the bottom of the car will also be due to this situation produces a kind of being sucked down state. Function: spoiler refers to one of the ways that automobiles reduce resistance by guiding air in a specific way. Commonly used in high-performance cars, can be driven faster in the corners, and help to reduce the resistance at high speed. The spoiler on commercial vehicles is often used for styling, with no or no aerodynamic benefits.