Power following real-time control method for extended-range automobile

Abstract

The invention discloses a power following real-time control method for an extended-range automobile, which comprises the following steps of: dividing the operation condition of the whole automobile into a normal operation condition and an extreme condition, then ensuring that the generating capacity of a range extender is directly used for a load demand as much as possible through a normal condition power following control method, and reducing the charge and discharge of a battery; and the method has the advantages of reducing the loss in the energy transfer process, improving the system efficiency and saving the oil consumption, and meanwhile, an extreme working condition power following control method is adopted, so that no battery is used as a buffer, the generated power of the range extender needs to change along with the load demand in real time, the power point adjusting speed is considered, and the NVH performance and the driving comfort are improved. The power generation power of the range extender is dynamically adjusted according to the electric quantity state of the battery and the load demand power, it is guaranteed that the range extender system works in the optimal efficiency interval, the smoothness of power point switching is considered, and the driving comfort is improved while oil saving is achieved. Meanwhile, the power following operation condition of the range extender under the special working condition is considered.

Description

technical field [0001] The invention relates to the technical field of range-extended vehicle control, in particular to a power-following real-time control method for an extended-range vehicle. Background technique [0002] With the current development of pure electric vehicles, the issue of battery life has always been an issue that makes customers anxious, and cannot fully meet consumer needs, which means that a transitional plan is still needed for a certain period of time. The extended-range electric vehicle has the characteristics of being close to wearing an electric vehicle, and can solve the problem of mileage anxiety of consumers. At the same time, it can satisfy most of the travel scenarios of consumers. It is a better transition solution. [0003] The range-extended vehicle, which is characterized by the coordinated operation of the engine + generator, can achieve better fuel-saving control and is well compatible with the pure electric platform by optimizing the r...

AI Technical Summary

Problems solved by technology

[0002] With the current development of pure electric vehicles, the issue of battery life has always been an issue that makes customers anxious, and cannot fully meet consumer needs, which means that a transitional plan is still needed within a certain period of time.

Moreover, if there is a battery failure during driving or when the vehicle is started in an extremely low temperature environment, the battery does not have the normal charge and discharge capability, and the vehicle still needs to drive at a low speed to get out of trouble. It causes excess power to charge the battery. If over-current causes irreversible damage to the battery, it may also damage the high-voltage system; if the power generated is less than the load, the vehicle may not be able to drive normally.

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