Extended-range automobile efficiency optimization control method based on threshold power calculation

The invention relates to an extended-range automobile efficiency optimization control method based on threshold power calculation. The extended-range automobile efficiency optimization control method is characterized by determining the power following threshold by taking the fuel consumption optimization as the target function; when the whole vehicle demand power is greater than or equal to the power following threshold, adopting the local fixed rotating speed power following control strategy; and on the basis of the local fixed rotating speed power following control, adopting a local switching rotating speed power following decoupling control strategy. The power following threshold is determined by the lowest fuel consumption, the balance point between the efficiency loss of battery charging and discharging when a range extender engine runs at the optimum operating point and the efficiency loss when the engine runs at the non-optimum operating point is searched, the local power following control strategy in