Hybrid power system for use in vehicle and control method thereof

A hybrid power system for use in a vehicle, wherein the system comprises an engine, a hybrid power module, and a dual input shaft speed change mechanism, the hybrid power module comprises an motor, a planetary gear system, a first clutch, and a brake, the planetary gear system is provided with at least three rotating shafts, which respectively are:

• a rotating shaft X1, a rotating shaft X2, and a rotating shaft X3, the axial lines of the three rotating shafts being on a straight line, and the rotational speed of the rotating shaft X2 falling between the rotational speed of the rotating shaft X1 and the rotational speed of the rotating shaft X3;
• the first clutch is arranged between any two of the three rotating shafts;
• a power output shaft of the engine is connected to the rotating shaft X3 or the rotating shaft X1 of the planetary gear system and to a second input shaft of the dual input shaft speed change mechanism, a rotor of the motor is connected to the rotating shaft X1 or to the rotating shaft X3, the rotating shaft X2 is connected to a first input shaft of the dual input shaft speed change mechanism;
• the brake is installed on the power output shaft of the engine;
• the dual input shaft speed change mechanism comprises the first input shaft, the second input shaft, several pairs of gears in a forward gear position, at least one set of gears in a reverse gear position and an output shaft, the first input shaft is provided with a driving gear in an odd-numbered gear position, the second input shaft is provided with a driving gear in an even-numbered gear position, and the output shaft is arranged with driven gears in respective gear positions, and the driving gears in the respective gear positions are meshed with the corresponding driven gears.