A fail-safe brake-by-wire system and its control method
A technology of brake-by-wire and control method, which is applied in the direction of electric brake system, brake, brake transmission device, etc., can solve the problems of short development time and failure of brake-by-wire system, and achieve improved safety, fast response, The effect of high reliability
Active Publication Date: 2021-05-25
JIANGSU UNIV
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Problems solved by technology
[0007] The EMB brake system obviously has many advantages that the traditional brake system cannot match. However, due to its short development time, there are also many problems that need to be solved urgently. System failure, because a lot of heat is generated during high-speed braking, which puts higher requirements on the stability of the motor
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[0027] The present invention will be described in further detail below in conjunction with the specific embodiments of the accompanying drawings, but the protection scope of the present invention is not limited thereto.
[0028] Figure 1-5 Shown is a fail-safe brake-by-wire system including an electronic control unit, a braking unit, and a fail-safe unit.
[0029]The electronic control unit includes BCU 1, battery 2, motor controller (MCU) 3, Hall current sensor 4, BCU1 is electrically connected with battery 2, motor controller 3 and Hall current sensor 4; BCU 1 is the brake control unit ( Brake ControlUnit), used to receive the brake pedal signal and the current signal collected by the Hall sensor, and at the same time control the motor controller 3 and then control the motor 5 to work to realize the brake by wire; BCU 1 is used to judge whether the driver has a braking demand and Whether the motor 5 performs braking, and then judge whether the brake-by-wire is invalid; BCU...
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The invention discloses a failure-proof brake-by-wire system and a control method thereof. The system includes an electronic control unit, a braking unit and a failure prevention unit, wherein the electronic control unit receives a brake pedal signal and a current signal collected by a Hall sensor. , control the brake-by-wire and trigger the anti-failure unit. The brake unit is used to implement the braking force and complete the braking process. The anti-failure unit is a mechanical hydraulic device consisting of hydraulic pressure blocks, friction blocks, coils, and hydraulic brake lines. Composed with a hydraulic cylinder, when the brake-by-wire and electronic control fail, it responds quickly and provides reliable braking force to ensure braking safety; the anti-failure unit is used as a backup brake unit for the brake-by-wire system, and the kinetic energy of the vehicle drives the hydraulic system to work. Braking is realized, and the braking safety is high. At the same time, the failure prevention unit is triggered by the mechanical structure, and the response speed is fast. After triggering, the intermittent braking prevents the brake from locking and ensures the safety of the emergency braking process.
Description
technical field [0001] The invention relates to the field of brake-by-wire, in particular to a fail-safe brake-by-wire system and a control method thereof. Background technique [0002] 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 brakes can meet the requirements of the existing braking regulations, they have shortcomings such as slow response speed, non-active adjustment, and difficult integrated control, which are not suitable for the current development requirements of automobiles. [0003] The brake-by-wire is extended from the vacuum booster, and a motor is used to replace the v...
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IPC IPC(8): B60T13/74B60L7/10
Inventor 王峰张健徐兴陶涛
Owner JIANGSU UNIV