Abstract
When considering resource saving and environmental safety in automobile, electric drive technology is one of the solution for it. Electric axle drive with torque vectoring (eAxle), which is being developed by Schaeffler, is modular system with traction system, transmission and electromechanical torque vectoring (TV). It is possible to operate torque vectoring independently of traction torque due to the fact that traction torque and torque vectoring torque, which are generated by traction motor and torque vectoring motor, is transmitted to both axle via planetary gear differential. In case of conventional differential which is used bevel gear set, torque vectoring motor have to be rotated with differential gear set when torque vectoring torque is applied to pinion gear of the differential. And the system consists of coaxial traction motor and planetary differential make high power density system. eAxle is effective not only resource or CO_2 saving by electric dive but also improvement for vehicle dynamics by the torque vectoring system.
