TH40111A - The vehicle body structure exhibits controlled reaction forces. - Google Patents

Abstract

DC60 (30/09/42) In vehicle body structures, including longitudinal sections with a first and second section sequentially connected to provide controlled reaction forces, during a vehicle collision, the second section is modified to undergo bending or deformation. The second section exhibits a relatively higher initial deformation load than the plastic deformation load, while the first section deforms at a lower initial deformation load than the second section, but relatively higher than the plastic deformation load of the second section. Therefore, the vehicle body exhibits a high action load during the initial phase of the vehicle collision and a low reaction load during the final phase of the collision, so that the maximum acceleration of the occupants of the vehicle, restrained by the seat belts causing elasticity, can be minimized. In vehicle body structures, including longitudinal sections with a first and second section sequentially connected to provide controlled reaction forces, during a vehicle collision, the second section is modified to undergo bending or deformation, where the second section exhibits a relatively higher initial deformation load than the plastic deformation load. The first part is modified to collapse at an initial deformation load that is relatively lower than the initial deformation load of the second part, but relatively higher than the plastic deformation load of the second part. Thus, the vehicle body exhibits a high action load during the initial phase of the vehicle collision and a low reaction load during the final phase of the collision, so that the maximum acceleration of the occupants of the vehicle, restrained by the seat belts causing elasticity, can be minimized to a certain quantity.

Claims (8)

1. The vehicle body structure consists of longitudinal sections, including the first and second sections, connected sequentially to provide time-controlled reaction forces during a vehicle collision. Specifically, the first section has a higher initial deformation load (first deformation load) and the second section has a higher initial deformation load (second deformation load) than the first and second deformation loads, and the second deformation load is lower than the first and second deformation loads. Therefore, during a vehicle collision, the first section deforms during the initial phase of the collision, and at the end of its deformation, the second section begins to deform and maintains its second deformation load during the final phase of the collision. 2. The vehicle body structure under claim 1, in which the first part consists of longitudinally protruding hollow sections, which are modified for collapse deformation by uniformly crumpling the walls of such sections. 3. The vehicle body structure pursuant to claim paragraph 1, where the first part is provided with a combined stress load to reduce the initial deformation of the first part. 4. The vehicle body structure under claim 1, where the second part consists of longitudinally protruding hollow sections which are modified for collapse deformation by uniformly crumpling the walls of such sections. 5. The vehicle body structure according to claim 1, where the second part consists of a pair of two-part beams which are modified to bend away from each other by bending under compressive load. 6. The vehicle body structure pursuant to claim paragraph 1, where the second part consists of the main beam and secondary beam sections which guide the direction of bending deformation of the main beam. 7. The vehicle body structure under claim 1, where the longitudinal parts consist of side sections extending from each side of the engine compartment to the underside of the passenger compartment floor. 8. Vehicle body structure under claim 1, where the longitudinal sections consist of extruded parts made of aluminum alloy.