Evaluation of Electromechanical Transmission System at Vehicle Level

With the rapid development and maturity of new energy technologies, electromechanical transmission systems, which deeply integrate electric transmission and mechanical transmission technologies, have been widely used in various vehicles and equipment. To ensure high efficiency and reliability of electromechanical transmission systems, this study investigated the vehicle-level comprehensive performance evaluation index system for an electromechanical transmission while focusing on the electrical properties of the transmission system. An evaluation index was constructed for the vehicle-level electromechanical transmission system. An expert investigation method was used to select and optimize the evaluation indicators, and the evaluation index system for the electromechanical transmission system was obtained. Based on an analytic hierarchy process and the grey relational algorithm, a vehicle-level evaluation method was established for the electromechanical transmission system. This study provides a theoretical basis and guidance for the validation, development, and design finalization of electromechanical hybrid vehicles.