International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 11 Issue: 09 | Sep 2024
p-ISSN: 2395-0072
www.irjet.net
KINEMATICS OF ELECTRONIC DIFFERENTIAL SYSTEM THE RELATIONSHIP BETWEEN TRACK LENGTH AND THE ROTATIONAL DIFFERENCE OF THE REAR WHEELS Adam Moiyadi1, Neeraj Gautam2, Amit Kumar Kundu3 1 Research Scholar, Department of Mechanical Engineering, Acropolis Institute of Technology and Research,
Indore.
2 Assistant Professor, Department of Mechanical Engineering, Shri Govindram Seksaria Institute of Technology and
Science (SGSITS), Indore.
3 Assistant Professor, Department of Mechanical Engineering, Acropolis Institute of Technology and Research,
Indore. ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - - “A vehicle whose propulsion system is fully or partially powered by electricity is termed as an electrical vehicle” 1. They were introduced around a century ago but due to the depletion of the fossil fuel resources and their adverse impact on
the environment the electric vehicles have suddenly taken a boom. The conventional electrical vehicles use a set of electric motors with a combination of a rechargeable electric battery pack to propel the vehicle. As the industry is trying to improve the range and performance of the electrical vehicle there are some mechanical components that can be replaced with more compact electric components to serve the same purpose but with less frictional losses. In traditional drive-train a differential is used. It is a set of gears arranged in a specific manner with three shafts it felicitates different rotational speeds to each rear wheel while cornering. It uses a gearing ratio which determines the difference in the speeds of each wheel. The electronic differential system is a mechanism which uses electric control unit and set of sensors to determine the optimal torque distribution between the wheels. By using clothoid2 also known as Euler’s curve3 we can understand the transition curves5 which are actively used in designing the highways and tracks. Using vector calculus, we can establish a relationship between the number of rotations of the rear wheels. Key Words: Electric vehicles, Clothoid, Euler’s curve, Transition curves, curved paths, Track length, Electronic Differential.
1.INTRODUCTION The weight of Electric Vehicles, including their structure and materials, has always been an area of interest for designers. They focus on reducing the body weight by optimizing the structure and form, often using aluminium as a preferred material. There have been advancements in motor design and control technology in vehicles. One notable improvement is the use of Electronic Differential (ED) instead of the traditional gearbox, which allows for a set of traction motor to drive both wheels. The speed of these individual-wheel can be managed by the ED, aligning the torque and rotation speed of the electric motor with the resistance and speed of the vehicle.
1.1 Why Electronic Differential System? An Electronic Differential System (EDS) offers several advantages over traditional mechanical differentials such as enhanced traction control, improved stability and handling, increased safety, the main purpose of the electronic differential (ED) is to replace the mechanical differential with a system with individual-wheel drives.
1.2 Kinematics and its application in Electric Differential system. Kinematics is a study of the system without considering forces that causes the motion. In electronic differential system the rotational motion of wheels, turning radius of the path and the curvature of the path are all deduce into a relation by using simple vector calculus4.
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