The present invention relates to a bumper system for motor vehicles.
As is known, the main function of bumper systems for motor vehicles is to convert impact energy to deformation energy in a collision with another vehicle or with any stationary or non-stationary obstacle. This limits damage to the motor vehicle.
As a rule, one known embodiment of such a bumper system comprises a cross-member that has a U-shaped cross-section, with the bar portion thereof connected via crush boxes to the longitudinal supports of the motor vehicle. The ends of the leg portions of the cross-member are connected, especially joined, using a closure plate, such that the closure plate prevents the cross-member from opening and/or flattening under a bending load. The profile of the bumper system is closed and thereby achieves high flexural rigidity, while remaining lightweight.
Both steel alloys and aluminum alloys are suitable materials for the cross-member and the closure plate. Furthermore, combinations of these materials are possible.