A new brake concept uses a car´s energy to slow itself down, making brake fluid obsolete
Despite all the auto-tech brain-power in this world, fully electronic brakes-
which would replace brake fluid with lighter, quicker wires and motors-have yet to arrive. The long-standing obstacle: Industry-standard 12-volt electrical systems can´t drive a motor powerful enough to stop a two-ton sedan. The prototype Electronic Wedge Brake, by German company Siemens, solves this problem by tapping the vehicle´s own energy to slow itself down. Electric motors  drive screwjacks  that move a corrugated outer plate  fore and aft in plane with the rotor .