At the same time, in order to reduce the injury to passengers in the event of a side impact accident, a car bumper is usually installed on the car to enhance the anti-collision impact force of the door. This method is practical and simple, with little change to the body structure, and has been widely used.
The installation of car bumper is to place several high-strength steel beams horizontally or obliquely in the door panel of each door, which plays the role of front and rear bumper, so that the whole car is "escorted" by bumpers at the front, rear, left and right, forming a "copper wall and iron wall", so that the car passengers have a maximum safety area. Of course, installing this kind of door bumper will undoubtedly increase some costs for automobile manufacturers, but for car passengers, the safety and sense of security will increase a lot.