Study on torque vectoring differential for vehicle stability control via hardware-in-loop simulation

A Torque Vectoring Differential (TVD) system base on vehicle stability control is proposed to achieve additional torque steering for improving vehicle steerability and stability. Firstly, a four-wheel-drive vehicle model is set up by veDYNA. Furthermore base on fuzzy logic control structure, the virtual controller including the yaw moment controller and TVD model are designed by Simulink. The yaw moment calculated by yaw moment controller is realized by TVD model with distributing vectoring torque from left to right wheel. In the end, a hardware-in-loop simulation (HILS) system simulating the rear wheel and axle equipped with TVD is introduced to combine with the vehicle model, the virtual controller, virtual instrument by LabVIEW and the experiment platform for transmission. The HILS results show that TVD system compared with Electronic Stability Program (ESP) can restrain the sideslip angle and yaw rate within their desired value without the deterioration of the longitudinal performance. Moreover, the effectiveness of TVD system for enhance vehicle cornering performance by vectoring torque is also guaranteed in simulation validation.