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Control method of regeneration brake process of front and back axle driving electric automobile

A regenerative braking, electric vehicle technology, applied in electric vehicles, electric braking systems, control driving, etc., can solve problems such as the inability to fully utilize the ability of electric vehicles to recover braking energy

Active Publication Date: 2016-12-14
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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  • Control method of regeneration brake process of front and back axle driving electric automobile
  • Control method of regeneration brake process of front and back axle driving electric automobile
  • Control method of regeneration brake process of front and back axle driving electric automobile

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Embodiment

[0050] The control method of the regenerative braking process of the front and rear axle drive electric vehicle of this embodiment is as follows: figure 1 As 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> 0; when the opening of the brake pedal is> 0, it is determined that the driver has a braking demand and enters the second step; otherwise, it is determined that the driver is not braking Demand, continue to detect the brake pedal opening;

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

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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, to a method for controlling 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 recover braking energy. The recovery of braking energy is conducive to further improving energy efficiency 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 is decelerating, but also requires the recovery of braking energy as much as possible. [0003] The control of regenerative braking involves two basic issues: 1) How to reasonably allocate between regenerative braking and mechanical friction braking according to the expected total braking force demand by the control strategy to recover as much braking ener...

Claims

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Application Information

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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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