Development of a New Electronically Controlled Torque Vectoring Device for All-Wheel-Drive Vehicles

Document Type : Original Article

Authors

1 Egyptian Armed Forces, Egypt.

2 Professor, Chairman of Dept. of Mechanical and Mechatronics Eng., HTI.

Abstract

This paper presents a comprehensive torque distribution device to actively control the torque distribution across the output shafts of an ordinary open differential. The proposed device can be used to control both the magnitude and direction of the torque between the driving axles of all-wheel-drive (AWD) vehicles and / or between the driving wheels of its rear axle. Both the design procedures and the development considerations of the device are outlined. Furthermore, a dedicated drive-train test rig is devised in order to exemplify and measure the characteristics of the controlled torque. The drivetrain test rig comprises different sensors such as wireless torque and driving speed measurements in addition to an electronic control module which regulates both the torque magnitude and direction. The experimental results illustrate the possibilities to bias variable amount of torque across the output shafts of open differential and therefore improve the traction potential during excessive tire slip conditions.

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