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A hybrid electric vehicle energy management method based on multi-objective optimization

A hybrid electric vehicle, multi-objective optimization technology, applied in hybrid electric vehicles, motor vehicles, data processing and management, etc., can solve frequent engine start and stop and frequent gear shifting, optimized energy management with large real-time calculations, and random working conditions Poor adaptability and other issues, to achieve the effect of reducing the amount of calculation, reducing impact, and optimizing ride comfort

Active Publication Date: 2022-06-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a hybrid electric vehicle energy management method based on multi-objective optimization in order to overcome the above-mentioned defects in the prior art, in order to solve the poor adaptability of the current hybrid electric vehicle regular energy management strategy to random working conditions , Optimized energy management has a large amount of real-time calculations, and at the same time considers avoiding frequent engine start-stops and frequent gear shifts, taking into account the needs of vehicle energy efficiency and ride comfort

Method used

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  • A hybrid electric vehicle energy management method based on multi-objective optimization
  • A hybrid electric vehicle energy management method based on multi-objective optimization
  • A hybrid electric vehicle energy management method based on multi-objective optimization

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Embodiment

[0048]The present embodiment provides a hybrid vehicle energy management method based on multi-objective optimization, the method comprising:

[0049] Offline optimization stage: Construct a multi-objective optimization function and perform offline optimization, the multi-objective optimization function considers the power source working state point transfer cost, power source efficiency cost, engine start-stop cost, battery state transfer cost and gear shift cost;

[0050] Online real-time control stage: Determine the torque demand of the whole vehicle according to the speed demand of the random working conditions, and use the optimized multi-objective optimization function to distribute the torque of each power source and set the gear of the car to control the operation of the car.

[0051] When implementing it, it is first necessary to debug the parameters of the energy management module offline according to the structure of the specific power system, such as Figure 1 shown; Af...

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Abstract

The present invention relates to a hybrid electric vehicle energy management method based on multi-objective optimization. The method includes: an offline optimization stage: constructing a multi-objective optimization function and performing offline optimization. The multi-objective optimization function considers the power source operating state point transfer cost , power source efficiency cost, engine start-stop cost, battery state transition cost, and gear shift cost; online real-time control stage: determine the vehicle torque demand according to the random working condition vehicle speed demand, and use the optimized multi-objective optimization function to perform the optimization of each power source Torque distribution and car gear setting to control the running of the car. Compared with the prior art, the present invention considers the multi-objective optimization problems of fuel economy, engine start-stop frequency, and shift frequency of the automobile, and takes into account the fuel economy and ride comfort requirements of the automobile.

Description

Technical field [0001] The present invention relates to the field of hybrid vehicle technology, in particular to a hybrid vehicle energy management method based on multi-objective optimization. Background [0002] Conserving resources and protecting the environment are important themes in today's era, and hybrid electric vehicles have great energy saving potential. The power source of the hybrid system consists of an electric motor and an internal combustion engine, and when it comes to providing power, it can have different ways of energy distribution, providing a certain degree of design freedom. As one of the core technologies of hybrid vehicle research and development, the energy management strategy realizes the energy distribution of the vehicle under different driving conditions by coordinating the energy distribution between the hybrid vehicle engine and the motor. Energy management strategies with excellent performance are of great significance for giving full play to the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W20/11B60W50/00
CPCB60W20/11B60W50/00B60W2050/001B60W2050/0029B60W2050/0031Y02T10/84
Inventor 郭荣孙自艺
Owner TONGJI UNIV
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