German automotive supplier ZF is using a plug-in concept vehicle called Vision Zero to showcase a number of new safety and zero-emissions technologies.
The entire propulsion system is housed in a space-saving modular rear axle system called mSTARS (modular Semi-Trailing Arm Rear Suspension). mSTARS is designed to make it easier to electrify existing production vehicle platforms. The 150 kW drive unit houses not only the electric motor but also a two-stage, one-speed spur gear drive, a differential, and power electronics along with control software.
The system’s integral link design and separate spring damper configuration frees up installation space between the rear wheels. ZF’s AKC active rear axle steering system, which can be combined with any modular axle configuration, is designed to improve agility, comfort and stability.
“mSTARS provides our customers with a basis for a wide range of applications in multiple vehicle segments,” explains Dr. Holger Klein, head of ZF’s Car Chassis Technology Division. “The solution is suitable for hybrid, fuel cell and battery-powered vehicles as well as in combination with conventional all-wheel modules or our AKC active rear axle steering.”