Plug-in hybrid power car system and energy control method thereof

Abstract

The invention discloses a plug-in hybrid power car system and an energy control method thereof. The hybrid power car system comprises an engine, a first hub motor, a second hub motor, a power battery, an ISG starting and power generating integrated machine, a clutch, a transmission, an inverter, a front axle half shaft, a front shaft main reducer, a differential mechanism and a control module; the engine and the two hub motors serve as power sources, and the engine is placed in the front and conducts front drive; and the hub motors are placed on two rear wheels, mechanical connection between the two wheels is canceled, and a suitable space is provided for arrangement of a power battery. An optimized fuzzy control method is used for the energy control method; considering the situation that fuzzy control adopts fuzzy rules established through specialist experience, and thus the optimum effect cannot be achieved, the energy control method utilizes the particle swarm algorithm to optimize the fuzzy rules; and through the designed energy control method, the energy flow direction and magnitude between the engine and the electric motors are reasonably distributed so as to obtain the optimum fuel economy and emission performance of a vehicle.

Description

technical field [0001] The invention relates to the technical field of hybrid electric vehicles, in particular to a plug-in hybrid electric vehicle system and an energy control method thereof. Background technique [0002] Plug-in hybrid electric vehicle (PHEV) is a model between hybrid electric vehicle and pure electric vehicle, which has the advantages of traditional hybrid electric vehicle (HEV) and pure electric vehicle (BEV) at the same time. Compared with HEV, PHEV is equipped with a larger-capacity power battery, and can be charged by an external power source. It can completely drive on pure electric power in urban road conditions or at low speeds. At this stage, the vehicle has zero emissions, energy saving and environmental protection, etc. Features: When the state of charge of the power battery is low or the peak power of the motor cannot reach the required power of the vehicle, the vehicle relies on the vehicle controller to automatically start the engine and assi...

AI Technical Summary

Problems solved by technology

However, there are two problems in the formulation of PHEV energy management methods in reality: on the one hand, excessive power consumption may lead to high electrical losses in the vehicle system, affecting the energy efficiency of the vehicle, that is, more energy needs to be consumed

On the other hand, insufficient power consumption of the vehicle may not be able to obtain the pre-designed fuel replacement function, and the capacity of the on-board energy storage system is far from the available limit

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