Implementation method for electric vehicle braking force redistribution

A technology of braking force distribution and implementation method, which is applied in the direction of electric vehicles, electric braking systems, brakes, etc., and can solve the problem of poor versatility, less research on four-wheel independent drive electric vehicles, and four-wheel independent drive electric vehicle braking force distribution strategy few questions

Active Publication Date: 2017-02-15
CHANGCHUN UNIV OF TECH
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Problems solved by technology

[0004] In addition, the research on the braking force distribution strategy based on the braking intensity is mainly concentrated in the electric vehicle braking system with dual-drive structure, but there is little research on the braking force distribution strategy for the four-wheel independent drive electric vehicle.
The braking force of an electric vehicle with four-wheel independent drive is divided into the frictional braking force and regenerative braking force of the front wheel and the frictional braking force and regenerative braking force of the rear wheel. Pow

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  • Implementation method for electric vehicle braking force redistribution
  • Implementation method for electric vehicle braking force redistribution
  • Implementation method for electric vehicle braking force redistribution

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Embodiment

[0244] The braking force redistribution strategy proposed by the present invention is verified by simulation experiments, and the vehicle parameters are shown in Table 1. The experiment uses high-speed road conditions HWFET (HighWay Fuel Economy Test) and urban road conditions UDDS (Urban Dynamometer Driving Schedule) as vehicle driving conditions, such as Figure 6a shown. According to the definition of braking strength, the corresponding braking strength can be calculated, such as Figure 6b shown. According to the braking strength of the vehicle when braking, the first distribution of the front and rear wheel braking force can be obtained, and the distribution results are as follows: Figure 6c , 6d , 6e, 6f shown. According to the efficiency of power demand, the braking force of the front and rear wheels can be distributed twice, and the distribution structure is as follows: Figure 6g , 6h , 6i, 6j shown. From the two distribution results of the front and rear whee...

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Abstract

The present invention belongs to the field of electric vehicle active safety, and especially relates to an implementation method for electric vehicle braking force redistribution. The method comprises the following steps: step one, simplification of a safety brake scope; second step, distribution of braking force for the first time; step three, calculation of power demand efficiency; and step four, redistribution of braking force. The present invention refers to an electric vehicle braking force redistribution strategy, the power demand efficiency is introduced into the braking force distribution strategy under the condition of considering the copper loss and iron loss of a permanent magnet synchronous motor, so that the braking force distribution strategy better accords to the actual situations, the effectiveness and practicability of braking force distribution are improved, and a support for the theoretical basis is enhanced.

Description

technical field [0001] The invention belongs to the field of active safety of electric vehicles, and specifically relates to a method for realizing redistribution of braking force of electric vehicles. Background technique [0002] The research and development of the braking force distribution strategy is indispensable whether the vehicle active collision avoidance system controller adopts the direct control structure or the layered control structure. For the research on the braking force distribution strategy of electric vehicles, the problem to be solved is the distribution of friction braking force and regenerative braking force. In this regard, many scholars have proposed many methods to solve this problem, for example, Non-Patent Document 1 Research on Control Algorithms for Regenerative Braking of Electric Vehicles, authors, Li Yufang, Lin Yi, He Hongwen, Chen Luhua; Non-Patent Document 2 Automobile Regenerative Braking System Braking force distribution, author, Chen ...

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Application Information

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IPC IPC(8): B60L7/18B60T8/172B60L7/26
CPCB60L7/18B60L7/26B60L2220/14B60L2220/42B60L2240/42B60T8/172B60T2270/604
Inventor 廉宇峰李丙林刘帅师刘克平
Owner CHANGCHUN UNIV OF TECH
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