摘要

Based on an analysis on the structure and motion characteristics of two coupling modes (torque coupling and speed coupling) in a plug-in hybrid electric vehicle, a power coupling system is proposed, in which torque coupling and speed coupling are in operation alternately. The design structural parameters are calculated according to the analysis on the speed characteristics of planetary gear mechanism and a co-simulation on the system is conducted with MATLAB/Simulink platform. The results indicate that the power performance indicators of the coupling system proposed meet the design requirements. In addition, compared with single coupling systems in the same condition of power performance indicators, the size and mass of power components with proposed coupling system can be effectively reduced.

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