What is the plastic under the front bumper called?

[KyleLynn]

The plastic panel under the bumper is called the car spoiler. Its main purpose is to reduce the lift generated when the car is driving at high speeds, thereby preventing the rear wheels from floating. If the car lacks a spoiler, during high-speed driving, the difference in air pressure between the upper and lower surfaces will naturally create an upward lifting force. This not only wastes the car's power but also directly affects driving safety. Here are specific details about the bumper: 1. Composition: The front and rear bumpers of a car are made of plastic. Generally, a car's plastic bumper consists of three parts: the outer panel, buffer material, and crossbeam. The outer panel and buffer material are made of plastic, while the crossbeam is formed by stamping cold-rolled sheet metal into a U-shaped channel; the outer panel and buffer material are attached to the crossbeam. 2. Function: The car bumper is a safety device that absorbs and mitigates external impacts, protecting the front and rear of the vehicle. In addition to maintaining its original protective function, it also strives for harmony and unity with the car's body design and pursues lightweight construction.