High-reliability EMB brake-by-wire system and control method thereof

Abstract

The invention discloses a high-reliability EMB brake-by-wire system and a control method thereof. The high-reliability EMB brake-by-wire system comprises an electronic control unit, a braking unit andan auxiliary energy recovery unit, wherein the electronic control unit receives a brake pedal signal to control the brake-by-wire system to perform braking, the braking unit comprises a first motor and a second motor, is used for performing braking force and reset, and completes the braking process; and the auxiliary energy recovery unit is composed of a rubber disk, a bevel gear group and a third motor, and recovers part energy in the braking process to charge a battery. A double-motor redundant structure is adopted by the braking unit of the brake-by-wire system, the first motor rotates positively and the second motor rotate reversely during normal working, the frequent positive and reverse rotation of the motors is avoided in the braking process, the service life of the motors is prolonged, and the braking response rate of the motors is improved; one motor fails and the other motor brakes alone to ensure the braking reliability; and the auxiliary energy recovery unit is adopted tocharge the battery of the drive-by-wire system to ensure the stability of the electric quantity of the braking system, energy is saved, and the energy consumption of the system is reduced.

Description

technical field [0001] The invention relates to the field of brake-by-wire, in particular to a high-reliability EMB brake-by-wire system and a control method thereof. Background technique [0002] With the increasing requirements for energy saving and environmental protection, new energy vehicles are developing rapidly. In the development process of new energy vehicles at this stage, people put forward higher requirements for the structure and function of the vehicle braking system under the premise of meeting the vehicle safety. [0003] The braking system is one of the important components of the car, which is directly related to the comprehensive performance of the car and the safety of life and property. Generally, drum or disc friction braking is used to convert the kinetic energy and potential energy of the car into heat energy through friction, so as to realize the deceleration of the car. or braking purposes. Although the traditional hydraulic and pneumatic service...

AI Technical Summary

Problems solved by technology

[0006] The EMB braking system obviously has many advantages that the traditional braking system cannot match. However, due to its short development time, there are also many problems that need to be solved urgently. For example, if the system power supply is insufficient, the braking system will fail. ;Due to the frequent positive and negative rotation of the motor during high-speed braking, a large amount of heat is generated, which puts forward higher requirements on the performance and stability of the driving motor under high temperature conditions, so it is necessary to strengthen the reliability of the power system and the stability of the motor.

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