Energy management control strategy of multi-mode hybrid electric vehicle based on energy efficiency maximization

A hybrid vehicle, energy efficiency technology, applied in hybrid vehicles, motor vehicles, data processing management, etc., can solve problems such as being unsuitable for energy management control optimization, unable to handle mode switching, etc., to achieve the effect of improving computing efficiency

Active Publication Date: 2019-01-18
SOUTHEAST UNIV
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Problems solved by technology

However, the optimal characteristics of this method have only been proven on parallel hybrid electric vehicles, and have not been proved for power split hybrid electric vehicles with more complex dynamic relations; meanwhile, the optimal e

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  • Energy management control strategy of multi-mode hybrid electric vehicle based on energy efficiency maximization
  • Energy management control strategy of multi-mode hybrid electric vehicle based on energy efficiency maximization
  • Energy management control strategy of multi-mode hybrid electric vehicle based on energy efficiency maximization

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] figure 1 It is the basic idea diagram of NEMS+ energy management control strategy for multi-mode hybrid electric vehicles.

[0039] The entire energy management control strategy NEMS+ is divided into two layers. The inner layer is the efficiency analysis method NEMS based on the global normalized efficiency factor GNEF. Here, only the speed and torque demand groups included in the driving cycle conditions can be solved to improve the calculation Efficiency; assuming that the open circuit voltage and internal resistance of the battery are constant in each time interval; the outer layer is the optimal mode determination method based on dynamic programming, which is the premise of avoiding frequent shifting and shifting energy loss and improving shifting smoothness Next, make an optimal mode switching control command. The operation process of NEMS+ will be descri...

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Abstract

The invention discloses an energy management control strategy of a multi-mode hybrid electric vehicle based on energy efficiency maximization, which is divided into two layers. The inner layer is an efficiency normalization maximization strategy, which is based on the efficiency analysis method of the global normalization efficiency factor. It is used to calculate the optimal energy distribution law, and can deal with the energy efficiency optimization problems of the hybrid mode and the pure electric mode at the same time. The outer layer is a dynamic programming, which is used to deal with the mode switching problem of multi-mode hybrid electric vehicle, and to solve the optimal mode switching commands, which can make the optimal mode switching control commands on the premise of avoidingfrequent shifting and shifting energy loss and improving the smoothness of shifting. The outer layer and the inner layer coordinate with each other to form a near-optimal energy management control strategy NEMS +, which is suitable for multi-mode hybrid electric vehicle. This method not only realizes the optimization of energy management control strategy, but also guarantees the smoothness of mode switching and the reasonable mode switching frequency.

Description

technical field [0001] The invention relates to an energy management control strategy for a hybrid electric vehicle, in particular to an energy management control strategy for a multi-mode hybrid electric vehicle that takes into account shift strategies. Background technique [0002] Before the specific energy and life of power batteries are greatly improved, the cost of fuel cells and the safety of hydrogen storage are reduced, hybrid electric vehicles are considered to be the most ideal energy-saving and environmentally friendly vehicle technology. Compared with traditional internal combustion engine vehicles, hybrid vehicles have at least two energy sources, which are electrical energy and fuel internal energy in general hybrid electric vehicles. How to control and utilize the characteristics of these two energy sources to complement each other, and to maximize the use of energy while ensuring the normal driving of the vehicle is the focus and difficulty of hybrid electri...

Claims

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Application Information

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IPC IPC(8): B60W20/20B60W20/30
CPCB60W20/20B60W20/30B60W2510/0666B60W2510/083Y02T10/84
Inventor 庄伟超黄泽豪殷国栋耿可可罗凯
Owner SOUTHEAST UNIV
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