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Side impact protection
| Fig. 1.18. Crash test (frontal impact)
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| Fig. 1.19. Crash test (side impact)
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According to statistics, account for almost 25% of all serious and fatal injuries of passengers and drivers in accidents are side impact. Therefore, Mercedes-Benz engineers have developed a crash test frontal impacts (Fig. 1.18) and side impact (Fig. 1.19), close to reality, and thus created the basis for the continuous optimization of the protection of passengers on such emergency cases in models of Mercedes. With the new crash-test engineers especially realistically simulate typical vehicle collisions. The test is performed by the movable structure, the deformation characteristics of which correspond to the front part of the vehicle - a collision member In the new E-class, held a series of measures to increase the passive safety: 1. The design of the bottom of the front seats for enhanced resistance to mechanical stress crossbar. There are elements to strengthen the middle of the tunnel and cross-link threshold. 2. The driver and passenger seats have a high transverse strength, proven in crash tests. 3. Under the windscreen and instrument panel are tight girders. 4. Side of the new E-class car strengthened trehprofilnoy middle rack welded to the threshold for creating a firm connection of the roof and floor. 5. Under the rear seat and between the uprights C are cross girders, which provide high strength of the body in the back area. 6. Resistant to deformation doors are reinforced pipes. 7. under internal door trim elements foam absorb some of the impact energy and reduce the risk of damage to the rib cage. Non-deformable aggregates, such as the electric windows or audio system speakers are out possible areas of contact with the passenger during the accident.
Technical Dictionary Safety requirements for body To meet all the body requirements of the modern car, it must meet the following criteria.
Rigidity. At high speeds, forces, the effects of which should be the body to resist in any conditions. Changes in the structure of the bending and arching under the effect of centrifugal force can act on the driving performance and affect safety. The hood and doors while driving should not be subjected to strong elastic deformation and to preserve planting density.
Deformation. As much as possible collision energy must be transformed into deformation. The deformation absorbs the kinetic energy of the impact. The structure of the body parts in a collision shall be deformed so as to ensure the least damage to the car.
Aerodynamics. The behavior of the car in a stream of air - an important prerequisite for high power and low fuel consumption. Thanks to the good aerodynamics at the same power, you can reduce the air resistance and fuel consumption. In addition, the aerodynamic shape of the body must ensure the prevention of "separation" of the car from the ground at high speeds.
Durability. The robust design of the body - only a step to his durability. Also of importance are effective corrosion protection and the use of materials with high resistance to corrosion. The only way to guarantee the functionality and reliability of the body for a long time.
Ease of repair. Must be guaranteed the possibility of repair and replacement of individual damaged parts of the body while maintaining its dimensions and the relative cheapness of these works.
The behavior under vibration. Acoustic oscillations and vibrations of the chassis, engine and transmission must be compensated so that the impact is not transmitted to the occupants. |
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