Hydraulic control valve based novel semi-active roll-resistant interconnected vehicle suspension

Abstract

Though the interconnected suspension system was proposed for anti-roll and anti-pitch applications, flow through the interconnected pipes hardly affects the vertical damper/actuator forces in conventional interconnected suspension. Despite the fact that active suspension improves comfort, handling and roll-resistant characteristics, implementing it in a commercial vehicle is challenging for most automotive manufacturers. Specifically, the energy demand for supplying high pressure fluid into the actuator chambers is the major hindrance. Thus, this research proposes a novel 4/3 hydraulic control valve (HCV) integrated semi-active roll-resistant interconnected system (SRIS) for vehicle suspension systems. The variable actuator force between the suspension mounts is achieved by utilizing the pressure developed in chambers of actuators, which is transferred to low pressure chambers through HCV via interconnected pipes. Where the truck body acceleration and roll angle were fed as inputs to the model predictive controller to control 4/3 HCV opening/closing. In this study, the vehicle model along with the controller model were co-simulated in a MATLAB-AMESim environment. In order to assess the roll-resistant of the proposed SAIS, the vehicle was tested under a double lance change (DLC) manoeuvre. In addition, this paper demonstrated the trajectory of vehicles with various under-inflation including flat-tyre when running over highways with and without steer input.