Review on Vehicle Drive Technology of Torque Vectoring

doi:10.3901/JME.2020.18.092

Abstract

Abstract: The direct yaw moment control is now widely used to maintain vehicle stability, but it also has the shortcomings of vehicle speed reduction and additional energy consumption, which affect the driving experience. In recent years, the technology of torque vectoring (TV) by differential drive has been developed. This technology reduces the power consumption while controlling the stability of the vehicle, takes into account the dual needs of vehicle maneuverability, stability and driving pleasure. In order to fully understand the development status of TV technology and clarify its future trend, the basic concept and research hotspots of TV technology is introduced first, and the technological development context of the torque vectoring differential as a key assembly is comprehensively reviewed. Then, the working principles and technical characteristics of several representative torque vectoring differentials currently used in traditional vehicles are analyzed. Finally, a novel electric torque vectoring drive-axle which is our patented technology is proposed for electric vehicles, and its mechanics properties and working principle are demonstrated. The research shows that TV technology can solve the contradiction between vehicle stability control and driving pleasure to a certain extent. The proposed novel torque vectoring drive axle without clutch friction elements will play an important role in improving the overall dynamic performance of electric vehicles. TV technology will become an important research direction for the future development of electric vehicles towards high performance and high-end.

Key words: electric vehicle, torque vectoring, differential, stability, maneuverability, yaw control

CLC Number:

U469

WANG Junnian, YANG Bin, WANG Qingnian, NI Jiantu. Review on Vehicle Drive Technology of Torque Vectoring[J]. Journal of Mechanical Engineering, 2020, 56(18): 92-104.

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