Analysis on the characteristics of compound-split mode powertrain system

In this paper, The rotate speed and torque relationship of the compound-split mode power split device was analyzed, and defined the mechanical point, analyzed the relationship between the power distribution ratio of system and transmission ratio, By using the lever diagram with four nodes, the relative position relations between the mechanical point and Power assembly elements were analyzed which will affect the transmission efficiency of the system, and through the analysis on the characteristic relationship between power elements, with the help of geometry theory to determine the characteristic parameters of planetary gear train, and provides the reference for the configuration design of the dual-mode hybrid system. (paper)