Central Electric-Motoring-Assisted Handling Control System for Electrified Vehicles

This paper presents the development of a central electric-motoring-assisted vehicle handling control system. The system is designed for electrified vehicles that are configured with axle-based electric-motoring capability. By networking the electric motor control with differential brake actuation, the system improves the performance of vehicle handling control in dynamic vehicle maneuvers while assuring satisfactory drive comfort and actuation smoothness. A torque vectoring scheme is thus achieved with coordinated vehicle yaw control by brake and traction control by active torque compensation from the electrified powertrain. Based on regular electrified vehicle architecture, the complexity and consistency problems associated with the torque vectoring coordination are solved at no additional cost. The proposed control technology not only extends the capability of the brake-based vehicle dynamic controls in maneuverability enhancement but retains a larger stability margin through dynamic handling courses as well.