Bumpers have the functions of safety protection, decoration of the vehicle, and improvement of the aerodynamic characteristics of the vehicle. From a safety point of view, when a car has a low-speed collision accident, it can play a buffering role to protect the front and rear car bodies; it can play a certain role in protecting pedestrians in the event of an accident with pedestrians. In terms of appearance, it is decorative and has become an important part of decorating the appearance of the car; at the same time, the car bumper also has a certain aerodynamic effect.
At the same time, in order to reduce the injury to the occupants of the car in the event of a side collision accident, a door bumper is usually installed on the car to enhance the anti-collision impact of the door. This method is practical, simple, and has little change to the body structure, and has been widely used. As early as the 1993 International Automobile Exhibition, the participating Honda Accord cut a part of a car door to reveal the door bumper for the audience to show its good safety performance.
The installation of the door bumper is to place several high-strength steel beams horizontally or obliquely in the door panel of each door, which plays the role of the front and rear bumpers of the car, so that the entire car has bumpers "guarding" the front, rear, left, and right sides of the car. , forming a "copper wall", so that the car occupants have a maximum safety area. Of course, the installation of this kind of door bumper 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.