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A vehicle energy recovery control method based on braking comfort

A technology of energy recovery and control methods, which is applied in the direction of control drive, electric vehicles, control devices, etc., can solve problems such as poor comfort, achieve a smooth change curve, ensure braking comfort, and optimize the effect of improving the braking force of passenger cars

Active Publication Date: 2021-12-14
XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a vehicle energy recovery control method based on braking comfort to solve the problem of poor braking comfort in the above existing solutions

Method used

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  • A vehicle energy recovery control method based on braking comfort
  • A vehicle energy recovery control method based on braking comfort
  • A vehicle energy recovery control method based on braking comfort

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Embodiment Construction

[0047] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0048] refer to figure 1 , a vehicle energy recovery control method based on braking comfort. In this specific embodiment, the vehicle is a pure electric bus. The pure electric bus is a common vehicle controller, battery management system, power battery, and motor controller. , motor, drive shaft, drive wheel and other structures of pure electric passenger cars, the present invention only relates to the control method of energy recovery during the vehicle braking process, the above structures are common structures in the field, and will not be repeated here. The control method includes the following steps:

[0049] Ⅰ. Obtain the brake pedal opening B (%) and the motor speed r during the braking process of the vehicle. The brake pedal opening B is collected by the vehicle controller of the vehicle.

[0050] Ⅱ. Analyze and generate the motor braking torqu...

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Abstract

The invention relates to a vehicle energy recovery control method based on braking comfort, comprising the following steps: 1. Obtaining the brake pedal opening B (%) and the motor speed r during the vehicle braking process. Ⅱ. Analyze and generate the motor braking torque command, where the motor braking torque is . Ⅲ. Send the motor braking torque command generated in step Ⅱ to the motor controller through CAN communication, and the motor controller controls the motor to perform corresponding torque output. The present invention adjusts the braking torque of the motor through the torque coefficient, and cooperates with taking different parameter b values ​​when the motor speed r corresponds to the constant torque region and the constant power region, thereby making the motor braking torque closer to the vehicle driver's expectation , to improve braking comfort.

Description

technical field [0001] The invention relates to the field of electric or hybrid vehicle motor braking, in particular to a vehicle energy recovery control method based on braking comfort. Background technique [0002] When braking a pure electric or hybrid vehicle, not only traditional mechanical braking exists, but also the negative torque output by the motor can provide braking force, and at the same time, part of the kinetic energy of driving can be recovered to reduce the total energy consumption of the vehicle. When the driver of the vehicle steps on the brake pedal, the vehicle controller obtains the required electric braking torque by analyzing the opening of the brake pedal, and sends the torque command to the motor controller through CAN communication, and the motor controller Execute the corresponding torque output. [0003] The Chinese patent with the publication number CN109484198A discloses an energy recovery method for electric vehicles, which includes the foll...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L7/10B60L15/20
CPCB60L7/10B60L15/2009B60L2240/10B60L2240/421B60L2240/423Y02T10/72Y02T90/16
Inventor 康林朱武喜
Owner XIAMEN KING LONG UNITED AUTOMOTIVE IND CO LTD
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