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Brake control method, brake control device and brake system for electric vehicle

An electric vehicle and braking control technology, applied in electric braking systems, electric vehicles, control devices, etc., can solve the problems of unsatisfactory emergency braking effect, shortening braking distance, increasing and other problems, so as to shorten emergency braking distance, improve braking reliability, and improve the effect of emergency braking deceleration

Inactive Publication Date: 2017-03-22
BEIJING CHANGAN AUTOMOBILE ENG TECH RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the braking of electric vehicles can be realized, when the electric vehicle is performing emergency braking, the braking force of the wheel brakes cannot increase the braking deceleration of the vehicle in the fastest time, and the braking distance cannot be shortened to the greatest extent. , the emergency braking effect is not ideal

Method used

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  • Brake control method, brake control device and brake system for electric vehicle
  • Brake control method, brake control device and brake system for electric vehicle
  • Brake control method, brake control device and brake system for electric vehicle

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Embodiment Construction

[0028] The core of the present invention is to provide a braking control method for an electric vehicle, which increases the emergency braking deceleration of the whole vehicle, shortens the emergency braking distance, and improves the braking reliability.

[0029] The invention also provides a braking control device and a braking system based on the braking method, which increase the emergency braking deceleration of the whole vehicle, shorten the emergency braking distance, and improve the braking reliability.

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belo...

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Abstract

The application of the invention discloses a brake control method for an electric vehicle. The brake control method comprises the following steps of: receiving pedal displacement information which comprises pedal displacement and pedal displacement time; simulating a curve for pedal displacement changing with time according to the pedal displacement information, and calculating the slope of the curve for pedal displacement changing with time; and sending a reverse current request signal to control a drive motor to drive reversely when a failure of a wheel side brake occurs or the slope of the curve for pedal displacement changing with time is greater than or equal to the slope of a set emergency braking critical curve. According to the brake control method, in the emergency braking working conditions of the electric vehicle, the drive motor is started to drive reversely to be braked together with the wheel side brake, so that compared with a braking manner by the wheel side brake alone, the brake control method has the advantages that the vehicle brake deceleration is increased, and the emergency braking distance is shortened, when a failure of the wheel side brake occurs, the drive motor is started to drive reversely, and the braking reliability is enhanced. The application of the invention also discloses a brake control device and a brake system.

Description

technical field [0001] The invention relates to the technical field of electric vehicle braking, in particular to a braking method for electric vehicles, and also to a braking control device and a braking system based on the braking method. Background technique [0002] An electric vehicle is a new energy vehicle that drives the wheels through a motor. When the braking system of an existing electric vehicle is braking, the driver depresses the pedal, the motor stops driving, and the pedal drives the wheel brake. Apply hydraulic braking force to the wheels to achieve the purpose of braking. Although the braking of electric vehicles can be realized, when the electric vehicle is performing emergency braking, the braking force of the wheel brakes cannot increase the braking deceleration of the vehicle in the fastest time, and the braking distance cannot be shortened to the greatest extent. , The emergency braking effect is not ideal. Contents of the invention [0003] In vie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60L7/00B60L15/20
CPCB60L7/006B60L15/2009B60L2240/429B60L2250/26Y02T10/72
Inventor 马涛李海霞张同王超
Owner BEIJING CHANGAN AUTOMOBILE ENG TECH RES
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