What is the name of the black plastic under the front of the car?

The black plastic under the front of the car is called a protective plate. Engine protection function: 1, to keep the engine room clean and prevent road dust from entering the engine room; 2. Prevent the hard sand rolled up by the tires from hitting the engine after the car runs. Due to the phenomenon that sand and hard objects hit the engine, 3. It will not affect the engine in a short time, but it will affect the engine for a long time; 4. It can also prevent uneven roads and hard objects from hitting the engine.