Design Method for Two-mode Power-Split Hybrid Transmission Characteristic Parameters Using Multi-Objective Optimization Algorithm

Power-split hybrid transmissions have been widely used in the automotive industry. Among them, two-mode powersplit hybrid transmissions can be adapted to a more variety of vehicles. Its performance is greatly influenced by the structure of the configuration, and an important factor in determining the structure is the characteristic parameters. In this paper, an optimal model that considers the mechanical point (MP) range of compound-split mode and the smoothness of the gear shift in the fuel-only mode is proposed. Based on the computer-aided method, a suitable multi-objective optimization algorithm is selected to design the characteristic parameters. Finally, a novel two-mode power-split hybrid transmission is used as an example to verify the feasibility of the method, which is more efficient than the manual design.