Multimode coupling power transmission system for single-motor hybrid electric vehicle

The invention belongs to the technical field of power assembly parts of new energy vehicles and relates to a multimode coupling power transmission system for a single-motor hybrid electric vehicle. The system comprises an engine, a planetary gear mechanism, a first gear, a brake, a second clutch, a second gear, a first clutch, a third gear, an inverter, a power battery, a motor, a third clutch, afourth gear, a fifth gear, a transmission, a main speed reducer and a differential assembly. By control of connection between the three clutches and the brake, coupling modes of the motor and the engine and the position of the motor relative to the transmission can be changed, motor and engine rotating speed coupling, motor and engine P2 parallel torque coupling and motor and engine P3 parallel torque coupling are realized, and accordingly acceleration performance of the system is improved, the problem of low load and low efficiency of the engine is solved, and system path changing efficiencyloss is reduced. 本发明涉及种单电机