Already for several years, automobile manufacturers, suppliers and development service providers have been developing "Torque-vectoring" systems that could be described in a laiac as reverse ESP. While ESP (electronic stability program) deliberately braked individual raders to avoid a spinning of the vehicle, these systems in principle make the opposite: they are targeting drive torque to individual raders so as to stabilize the driving behavior. For this technique, the term torque vectoring has established itself in the automotive industry, which means so much as "targeted drive torque distribution".
After Torque Vectory has hitherto a niche-sense of serial applications, more and more car manufacturers are attentive to the benefits of a driving dynamics control system, which uses the drive torque to hold the vehicle with reprint on the right path.
Because in contrast to ESP, the vehicle can be stabilized without braking it. Not for nothing, for example, Subaru in the Impreza WRC has been such a system for years in the rally sport.
Vector drive for four-wheel and rear wheel drive
The transmission specialist ZF Friedrichshafen has now developed with the "vector-drive" rear axle transmission a concept for serial maturity, which should significantly increase the driving dynamics and the safety reserves of vehicles with all-wheel drive and rear wheel drive significantly. By an individual distribution of the drive torque on the rader of the rear axle, the system generates a yaw moment – that is, a moment about the high axis of the vehicle – which can improve both the agility and the stability.