A leaf is a covering (a slightly protruding, semi-circular piece above the wheel) on motor and non-motor vehicles that, as the name implies, covers the outer shell of motor and non-motor vehicles. In line with the fluid dynamics, reduce the wind resistance coefficient, let the car ride more smoothly.
A leafboard is also called a fender (named for the shape and position of this part of the old car body that resembles a bird's wing). The leaf plates are located outside the body of the wheel. The function is to reduce the wind resistance coefficient according to the fluid dynamics, so that the car runs more smoothly. According to the installation position, it can be divided into front leaf plate and rear leaf plate. The front leaf plate is installed above the front wheel. Because the front wheel has the steering function, it must ensure the maximum limit space when the front wheel rotates. The rear leaf is free from wheel rotation friction, but for aerodynamic reasons, the rear leaf has a slightly arched arc protruding outwards.
Secondly, the front leaf board can make the car driving process, prevent the wheel rolled up sand, mud splash to the bottom of the carriage, reduce the damage to the chassis and corrosion. Therefore, the materials used are required to have weathering resistance and good molding processability. The front fender of many automobiles is made of plastic material with certain elasticity, so that it has certain cushioning and is more secure.
