Bumper has the function of safety protection, decoration and improving the aerodynamic characteristics of the vehicle. From the safety point of view, the car can play a buffer role in the event of low-speed collision accident, to protect the front and rear car body; In the event of accidents with pedestrians can play a certain role in protecting pedestrians. From the appearance, it is decorative and becomes an important part of decorative car appearance. At the same time, car bumpers also have a certain aerodynamic effect.
At the same time, in order to reduce the damage to the occupants in the case of side impact accidents, cars are usually equipped with door bumpers to enhance the anti-collision impact force of the doors. This method is practical, simple, little change to the body structure, has been widely used. As early as 1993 Shenzhen International Automobile Exhibition, a car door was opened to expose the bumper for the audience to see, to show its good safety performance.
The installation of the door bumper is in each door of the door plate horizontal or oblique several high strength steel beam, play the role of the car front car rear bumper, so that the whole car around the bumper "protection", forming a "iron wall", so that the car occupant has a maximum safety area. Of course, the installation of such door bumpers will undoubtedly increase some costs for car manufacturers, but for the occupants of the car, the safety and sense of security will increase a lot.
