Capabilities and limitations of torque vectoring systems (which correct the direction of movement by wheel driving forces) in motor vehicles
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University of Bielsko-Biała, Faculty of Mechanical Engineering and Computer Science, Department of Combustion Engines and Vehicles
Publication date: 2015-03-09
The Archives of Automotive Engineering – Archiwum Motoryzacji 2015;67(1):23-36
The presentation covers the idea and purpose of the systems that influence vehicle’s drive direction by torque vectoring. Based on results of model simulations and experimental testing of existing systems, the effectiveness of such systems has been shown. The basic variants of Torque Vectoring systems, capable to fit in wheeled vehicle’s single drive axle, have been presented and compared with each other. Particularly much attention has been dedicated to the description and analysis of the group of designs referred to as “active differential gears”, featuring an additional inner kinematic bond. A few known designs of this kind, including those available in the market, have been described in detail. A comparison between them has highlighted significant differences in their kinematic layouts and control systems. The author has also tried to define directions of further development and standardization of the active differential gears. A particular design of such differential gears applied to electric and hybrid vehicles has been discussed and an author’s own concept has been presented. In the final part, an attempt has been made to answer a question how the Torque Vectoring systems affect the active safety of motor vehicles, with highlighting the necessity of taking into account the capabilities of such systems in respect of the handling and transverse dynamics of a vehicle at post-accident simulations and analyses.
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