Security for basic functions and principles

 With the increasing number of cars and transportation increasingly complex, an increase in car accidents, caused serious casualties and property losses, has become a social problem can not be ignored. To solve this problem and set the security guards is an important component of modern automotive structural parts.
 In the event of car crashes, the security guards can effectively reduce the extent of casualties and vehicle damage.
 Two cars collide, the car's front and rear bumper or the side of the body such as components of care first contact with each other, then these components is connected with the body structure and deformation have collapsed, threatening the occupants inside the vehicle.
 Front of the car by the impact, the vehicle occupant to leave due to inertia seat ahead. At this point, dashboard, steering wheel, windscreen pillars, windshield, wind on the beam window frames, etc. often with the body's chest, abdomen or head on collision, injury to become a major structure damage.
 Car and pedestrian collision, the bumper, front sheet metal parts or other parts of the body most vulnerable to the front wall so that pedestrians were injured. By pedestrian after impact, the side of the head is likely hood of cars, wind, or the lower edge of the windshield frame and other parts.
 Thus, the automobile body structure and the various structural elements have higher security requirements.
 When a car crashes, sports a sharp stop, the lack of buffer distance, and the body with sharp hard objects can cause serious injury or death touch. Therefore, the vehicle security devices and structural principles of the basic functions can be summarized as follows:
 1, the constraints imposed on the crew so that to avoid a collision with the car in the car or thrown objects hit the vehicle;
 2, resulting in a soft cushioning effect, which is the appropriate components to absorb impact energy from the deformation, or the rate of decline gradually to avoid a large reduction in the speed and impact force;
 3, increase the body contact area with the vehicle components, to avoid the collision point of contact so that the extrusion force per unit area caused by the impact force reduction or transfer to non-critical parts of the body.