Range extending type electric automobile power system adopting double-clutch two-gear automatic transmission

The invention provides a range extending type electric automobile power system adopting a double-clutch two-gear automatic transmission. A crankshaft of an engine is connected with a transmission shaft through a clutch. A first motor and a second motor are connected with an input disc of a double-clutch through the transmission shaft. Through control over disengagement and engagement of two clutch bodies of the double-clutch, two gears can be achieved. Under the condition of the low speed and low power of a vehicle, only the second motor works. Under the condition of the medium and high speed of the vehicle, the first motor and the second motor can work jointly, the engine is prevented from working at the low speed and the low load, zero emission and zero pollution can be achieved, and meanwhile due to the adoption of the two motors, the recycling braking capacity of the motors is improved. Under the condition of the high speed and large power of the vehicle, the engine can be made to work within an optimal efficiency region, the dynamic property and economical efficiency of the vehicle are improved, and meanwhile the travel distance of the vehicle is prolonged. The range extending type electric automobile power system has the beneficial effects of being compact in structure, small in axial installation size, convenient to install and easy to arrange.