ANALYSIS OF THE FEASIBILITY OF APPLYING A DUAL-MASS FLYWHEEL IN AN ELECTRIC VEHICLE TRANSMISSION

Abstract

The paper presents the results of a comprehensive study on the feasibility of applying a dual-mass flywheel in an electric vehicle transmission, taking into account the specific operating characteristics of the electric drive, the powertrain parameters, and dynamic loading conditions. The relevance of the study is driven by the need to improve the efficiency of electric motor utilization, reduce dynamic loads acting on transmission components, and enhance the operational performance of vehicles equipped with electric drivetrains. The main issues associated with the operation of electric vehicle transmissions are analyzed, and it is shown that conventional solutions based on rigid mechanical connections between the electric motor and transmission elements may lead to high-frequency torsional vibrations, which adversely affect the reliability and service life of mechanical components. The primary objective of this research is to assess the applicability and substantiate the feasibility of using a dual-mass flywheel to mitigate torsional vibrations, reduce torque pulsations, and improve the overall efficiency of transmission operation. To achieve this goal, mathematical modeling of the dynamic interaction between the electric motor, the dual-mass flywheel, and the load was carried out under acceleration and regenerative braking modes. The results of numerical simulations made it possible to identify the influence patterns of dual-mass flywheel parameters on transmission performance, determine optimal mass and stiffness ratios of the flywheel elements to minimize vibration levels, and evaluate the potential benefits of its implementation. The analysis of the obtained results demonstrates that the use of a dual-mass flywheel can provide a significant reduction in torsional vibration amplitudes, decrease mechanical loads on transmission components, and improve driving comfort in electric vehicles. However, the feasibility of implementing such a system depends on specific operating conditions, design constraints, mass-and-size limitations, and economic considerations. The generalized conclusions indicate the existence of substantial potential for further experimental and applied research, which may serve as a basis for optimizing the transmissions of modern electric vehicles.