Is 4-wheel steering more efficient than 2-wheel steering? This is contrary to what we've learned growing up when we consider conventional 4x4's and that low-efficiency Transfer Case, and so on, to re-distribute the torque from one single engine. I'm sure the savings are miniscule, but still, that is the game.
They may have even simplified the steering in the process - however, this is a leap of imagination. What if there is no steering required in the sense of a gearbox and tie rods, unless needed as emergency backup? It takes some energy to turn the wheel correct? Especially with lots of angular momentum on spinning wheels. Combine Regen and Accel on opposing sides. Further, could equal but opposing wheel torque alone cause the wheels to turn without the vehicle moving, and without any steering forces? One flaw is you'd need to accommodate a failed motor somehow... maybe the steering is manual like the old days, used in emergencies. Your steering wheel is no different than a nice gaming wheel with Haptic Feedback, and engages only when needed. I think I'll go smoke some more...
