Abstract
The purpose of this research is to develop a new torque vectoring differential (TVD) for vehicle applications and investigate its effect on vehicle dynamic control. TVD is a technology that is able to distribute the engine torque to the left and right driving wheels at different ratios so that the yaw motion control can be realized. Attention has been paid to this technology in recent years because of its potential to improve the vehicle performance and driving safety. In this study, a new TVD design with a Ravigneaux gearset was developed. This new design is able to use only one pair of gearsets to generate two different speed ratios, and the weight and volume of the system can be reduced. To execute the research, current TVD designs were analyzed and their design principles were clarified. Next, a new TVD design with Ravigneaux gearset was proposed. Then the connecting manner and the gear ratio of the Ravigneaux gearset were discussed. The dynamic equation of the system was then derived and the operation of the system was simulated in a MATLAB program. Further simulation was performed with a vehicle dynamic model in SimulationX to demonstrate the effect of the new system. The results of this study show the potential of building a new TVD with a Ravigneaux gearset and can be helpful for further system development.
Highlights
Vehicle dynamic control is an essential task for improving driving performance and vehicle safety
To applications, demonstrate torqueand vectoring effect of torque vectoring differential (TVD) and and its influence while vehicle dynamic model that comparedand with the a solid axle (SA) systems and an open differential (OD)applied in turningtoina vehicle applications, thewas were built and to a the simulation software called SimulationX
SimulationX is software provides a modeling platform vehicle dynamic model that was compared with a solid axle (SA) and an open differential (OD) in and libraries with customizable elements and tools which can be used for system development the simulation software called SimulationX
Summary
Vehicle dynamic control is an essential task for improving driving performance and vehicle safety. Different control strategies such as direct yaw-moment control (DYC) have been proposed and well-discussed in the past [1,2]. E.g., electronic stability program (ESP) [3], four-wheel steering (4WS) [4] have been developed to realize vehicle dynamic control in practical applications. Torque vectoring is a new technology that has been drawing the attention of the car industry in recent years. It is employed in automobile differentials and is able to distribute different driving torque values to different wheels so that traction distribution can be realized. The torque vectoring technology becomes more competitive than the brake-based systems
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