That Q7 featured aluminum on the hood, fenders and tailgate. On the 2017 Q7, aluminum sheet has spread to the roof, floor and doors (internally as well as the door panel), while aluminum sections and castings can be found in other areas of the SUV – including front and rear bumper beams.
Audi says it developed new techniques to join the Q7, including “roller hemming” the side wall frame to create “ultra-strong B-pillars.”
“It allows slender flanges and correspondingly large, comfortable door cutouts,” Audi stated in a news release.
Audi also friction-element welds rivets to connect steel and aluminum, and “Punch-riveting, clinching and self-tapping screws make up the so-called cold-joining techniques from the Audi repertoire,” the OEM states.
Another interesting collision tidbit: If the car hits a pedestrian, “pyrotechnic elements push the hood upwards in a flash, preventing the person’s head from striking against hard engine parts.” We wonder what that means for mechanics and repairers working on the hood or engine.