Enhancing Vehicle Roll and Yaw Stability Through a Novel Semi-Active Interconnected Structure Mechanism Using 4/3 Hydraulic Control Valves

Vehicle rollover and wheel lift-off is inevitable under certain conditions which kills vehicle handling abilities causes serious accidents/fatalities. However, the conventional suspension structure repeatedly fails to meet the requirements in dynamic conditions due to its passive characteristics. Though the active suspension system improves roll dynamics, an excessive amount of energy demand is required, and implementation in vehicles is a major hindrance. A smart suspension structure with less power consumption to supply the pressurized fluid adequately as needed for achieving safety and comfort. Attaining instantaneous pressurized fluid with minimal power proved to be a formidable challenge. A novel semi active suspension system was proposed using 4/3 hydraulic control valve (HCV) which requires minimal power to attain variable force. Through the proposed architecture, roll and yaw stability was improved by minimizing the lateral load transfer along with the suspension objectives. To assess the dynamical characteristics and the ability of the proposed structure, vehicle model was investigated under double lane change (DLC) and slalom test. The proposed suspension structure with MPC controller was tested experimentally using dSPACE MicroAutoBox III hardware. The results shows that the proposed suspension system provides significant improvement in enhancing the vehicle safety. The proposed system considerably improves the performance of lateral load transfer ratio (LTR) by 30% over the conventional systems.