This patent filing, dug up by Autocar, supposedly shows Audi's next-generation all-wheel-drive Quattro system.
This Audi Concept Hints at the 2017 Production Q8 - Rumor Has It That An Electric Version With Up to 370 Miles of Range is Under Development - This Quattro Patent is Not Related to This Pure Electric Vehicle
As Autocar reports, that patent sketch shows "a new-generation Audi all-wheel drive system which uses an electrically driven rear axle."
According to Autocar, Audi is working on some sort of "rapid-reacting" system that allows "brake regeneration forces to vary according to the road conditions."
It's not clear which vehicle Audi has in mind for this next-gen Quattro setup, but we're thinking something like this would be most beneficial on a crossover-ish plug-in hybrid.
It's clearly not a patent for a pure electric vehicle, as the sketch definitely shows an engine up front.
Autocar concludes that this patent could "result in the most intelligent and quickest-reacting all-wheel drive system yet."