AWD Coupling Modeling and Contribution to Vehicle Dynamics

Controllable AWD coupling systems are applied for optimizing vehicle traction capability and dynamic performance by adequately distributing the torque between the front and the rear axle according to the driving conditions. With its linearity, compactness and low power consumption, JTEKT Intelligent Torque Controlled Coupling (ITCC) shows a high performance to power consumption ratio. A 5-dof model of an ITCC is proposed for satisfying the requirements on further insight on the internal dynamics and its interaction with the vehicle driveline. Difference in simulated vehicle performance is shown by comparing a generic 2-dof and the 5-dof model of the ITCC. The results obtained justify the development of evolved coupling modeling for a better understanding of the internal motion of the coupling and the interaction with the driveline.