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A control method for the regenerative braking process of an electric vehicle driven by front and rear axles

A technology of regenerative braking and electric vehicles, which is applied in the direction of electric vehicles, electric braking systems, control drives, etc., can solve the problems that the ability of electric vehicles to recover braking energy cannot be fully utilized, achieve stable recovery, improve recovery efficiency, The effect of extending the mileage

Active Publication Date: 2018-08-07
佛山佑尔汽车智能技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The control of regenerative braking involves two basic issues: 1) the control strategy according to the expected total braking force demand, how to make a reasonable allocation between regenerative braking and mechanical friction braking, so as to recover as much braking energy as possible; 2) How the control strategy reasonably distributes the total required braking force on the front and rear wheels to achieve a stable and safe braking process
This method can only recover a small part of the energy, and cannot give full play to the ability of electric vehicles to recover braking energy

Method used

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  • A control method for the regenerative braking process of an electric vehicle driven by front and rear axles
  • A control method for the regenerative braking process of an electric vehicle driven by front and rear axles
  • A control method for the regenerative braking process of an electric vehicle driven by front and rear axles

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Embodiment

[0050] In this embodiment, the control method of the regenerative braking process of the electric vehicle driven by the front and rear axles is as follows: figure 1 shown; including the following steps:

[0051] The first step is to detect the opening of the brake pedal until the opening of the brake pedal is greater than 0; when the opening of the brake pedal is greater than 0, it is determined that the driver has a braking demand and enters the second step; otherwise, it is determined that the driver does not brake demand, continue to detect the brake pedal opening;

[0052] The second step is to collect the vehicle status information; the vehicle status information includes the vehicle speed, the current speed n of the front axle drive motor f , the current speed n of the rear axle drive motor r , battery pack SOC, DC bus voltage, brake pedal opening and opening change rate; among them, the opening change rate can be directly measured by the sensor, or can be obtained by ...

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Abstract

The invention provides a control method of a regeneration brake process of a front and back axle driving electric automobile. The control method is characterized in that firstly, whether the brake requirement exists or not is judged through detecting the opening degree of a brake pedal; then, whether the automobile speed, the battery pack SOC and the brake intensity meet the regeneration brake control starting conditions or not is judged; then, a regeneration brake torque distribution optimization model of a front and back axle driving motor is built; T<bf> and T are obtained through solution. The control method provided by the invention has the advantages that the safety and the stability of the front and back axle driving electric automobile in the brake process can be ensured; meanwhile, the brake energy is recovered to the maximum degree; the running mileage of the electric automobile is further prolonged.

Description

technical field [0001] The invention relates to the technical field of electric vehicle regenerative braking, and more specifically relates to a control method for the regenerative braking process of an electric vehicle driven by front and rear axles. Background technique [0002] One of the most important features of electric vehicles is the ability to recycle braking energy. The recovery of braking energy is conducive to further improving energy utilization and extending the mileage of electric vehicles. The regenerative braking system of electric vehicles not only needs to meet the braking performance requirements when the vehicle decelerates, but also needs to be able to recover as much braking energy as possible. [0003] The control of regenerative braking involves two basic issues: 1) the control strategy according to the expected total braking force demand, how to make a reasonable allocation between regenerative braking and mechanical friction braking, so as to reco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/18B60L7/26B60L15/20
CPCB60L7/18B60L7/26B60L15/2009B60L2220/42B60L2240/423Y02T10/72
Inventor 周艳红郑伟胜杨兆万吴珩许安鹏陈立平周云飞
Owner 佛山佑尔汽车智能技术有限公司
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