Method and system for controlling dynamic gear and economical gear of pure electric automobile

The invention provides a method and a system for controlling a dynamic gear and an economical gear of a pure electric automobile. The system comprises an entire automobile controller, a gear shifter, an accelerator pedal, a brake pedal, a drive motor controller and a power battery controller, wherein the whole automobile controller is used for judging whether the automobile is in a dynamic running state, an economical running state, a driving state, a braking state or a sliding state according to a gear signal of the gear shifter, an opening signal of the accelerator pedal, an on-off signal of the brake pedal, an automobile speed signal and the like, and formulating a corresponding torque calculation strategy, as well as collecting a gear shifter fault signal, an accelerator pedal failure signal, a failure signal fed back by the drive motor controller, a fault signal fed back by the power battery controller and the like, performing fault diagnosis and finally sending target torque to control the power output of the automobile. By virtue of the gear shifting, the method and the system can be used for reducing the energy consumption rate of the system and improving the driving mileage of the whole automobile while meeting an automobile dynamic performance target.