In the electric car, based on the vision of IV also joined a combustion engine. Can not directly drive the internal combustion engine vehicles, but can only generate electricity, thus accurate to say that this is not a generator engine. In the absence of sufficient battery power, the generator will start to charge the battery, when necessary, the generator can produce electricity directly to the electrical power supply. Abandon the conventional internal combustion engine as transmission, no transmission and other components, drive link can be greatly simplified, is conducive to higher efficiency. In this way, the total mileage of vision IV's life can be increased to 450 km.