Multi-material hybrid bumper

摘要

A vehicle bumper system having a metallic elongated reinforcing member extending substantially across the width of the vehicle. The reinforcing member can be made from aluminum or steel and has a generally SIGMA-shaped cross section which is filled with energy-absorbing foam. The SIGMA-shaped cross section is preferably formed by extrusion. A preferred composition of the reinforcing member is an aluminum alloy selected from the group of 6XXX and 7XXX alloys.