Hyundai Mobis have developed a new level 4 or higher brake system that will enhance the safety of autonomous cars. Hyundai Mobis succeeded in developing the ‘redundancy brake system’ in which new brake system becomes automatically engaged even if the original brakes fail due to failure of electrical devices or external shock. The future technology is in preparation for an emergency situation of fully autonomous driving, this technology has never been applied to production cars.
Redundancy, which means ‘dualization or extra,’ is a technology directly connected to the safety of passengers. As autonomous driving evolves to a higher level, the intervention of the driver decreases, and it becomes essential to secure the precision safety technology in preparation for an emergency situation. Accordingly, active efforts to develop redundancy technologies in key automotive parts including the brake system are being made.
The redundancy brake system, developed by Hyundai Mobis, is rated as the state-of-the-art safety technology to proactively prepare for level-4 or higher fully autonomous driving. Autonomous driving is divided into a total of six levels (0-5), and autonomous driving cars must be able to handle emergency situations by themselves at levels 4 and 5, the last level. If the redundancy brake system of Hyundai Mobis is applied, the auxiliary brake system is activated in an emergency situation. So the car will be able to reach the destination safely without any emergency situation transpiring.
The redundancy brake system consists of two electronic brake systems, the ECU, which is the brain for controlling them, and the software control platform.
At normal times, the two controllers are connected to each other and exchange data, but if the main brake system is not working normally, the controller detects it, and orders the auxiliary brake system to start working. The core of this technology is to develop the software platform to help the control make a correct judgment at this time. During autonomous driving, numerous variables, which perceive external environments, must be taken into consideration.
It has been reported that even global competitors failed to easily develop the redundancy brake system because it is difficult to implement precise hardware technology and the software for controlling the two systems. Only a small number of foreign companies applied this technology to small busses with plenty of design space, and introduced the concept, but Hyundai Mobis is the first company to successfully develop the redundancy brake system at a level that can be immediately applied to passenger cars or SUVs.