Dana Torque Vectoring Differential Dynamic Trak™

This paper presents a novel torque-vectoring (biasing) differential system Dynamic Trak^™ that can be applied to both the inter-axle and the inter-wheel differential systems. The Dynamic Trak^™ has three multi-plate clutches. The center clutch located inside the differential case provides a limited-slip or complete lock-up capability. The two outboard clutches positioned at either sides of the differential case selectively adjust the torque flow to the left or right shafts/wheels. An electronic control unit and a hydraulic circuit unit control the three clutches, realizing the active management of the torque to the two output shafts/wheels. The Dynamic Trak^™ can provide maximum of 100% torque add or subtraction to the wheels, while maintaining the open differential feature. A virtual model representing a passenger car equipped with the Dynamic Trak^™ has been developed. The simulation results show the handling and stability enhancements by the Dynamic Trak^™.