EWB (Electronic Wedge Brake)

EWB is a technology from Siemens VDO based on an aeronautical concept. The electronic brake completely bypasses the classic hydraulic system, instead being driven by fast stepping motors powered by the vehicle's 12-volt power supply.

Each wheel has its own module with a control unit. When the brake pedal is depressed, the stepper motors are activated, which press the brake lining plate against the brake disc, moving the top plate. The more the plate moves - deviates to the side, the more the brake pad presses on the brake disc. The faster the wheel spins, the more the braking force on the disc increases. Thus, EWB requires much less energy than existing hydraulic systems. This system also has a faster response time, operating about a third faster than conventional brakes, so it only takes 100ms for this system to reach full braking force compared to 170ms for a conventional hydraulic brake.