Dynamic coupling system for hybrid vehicle

The invention provides a dynamic coupling system for a hybrid vehicle, which comprises an engine, a two-stage planetary gear mechanism, a first motor and a second motor, wherein the first motor is a hollow shaft motor and the second motor is a solid shaft motor; the output shaft of the engine is connected with the gear ring of the two-stage planetary gear mechanism; the hollow shaft of the first motor is connected with the sun gear of the two-stage planetary gear mechanism; the solid shaft of the second motor passes through the hollow shaft of the first motor to be connected with the planet carrier of the two-stage planetary gear mechanism; and thus, the power output by the engine serving as one power source and the power output by the second motor serving as the other power source are coupled by the two-stage planetary gear mechanism and output to a transmission shaft. The system has a simple structure and small volume, can save space and can be controlled simply; and thus, the system is suitable to be used as a power transmitting device for a front-engine rear-drive vehicle. Through the coordinated control over the engine, the first motor and the second motor, power outputs under different vehicle conditions can be realized.