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Hydraulic brake system and method with double hydraulic cylinder four-wheel failure backup

A dual-hydraulic cylinder and hydraulic braking technology, which is applied in the direction of braking safety systems, brakes, and braking transmission devices, can solve problems such as driving safety hazards and loss of efficiency, and achieve auxiliary braking, large degrees of freedom, and good The effect of braking effect

Inactive Publication Date: 2015-09-30
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the simple use of electronic control braking system has great disadvantages, that is, the braking system of the car will lose its effectiveness when the electronic control fails, which brings great hidden dangers to driving safety.

Method used

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  • Hydraulic brake system and method with double hydraulic cylinder four-wheel failure backup
  • Hydraulic brake system and method with double hydraulic cylinder four-wheel failure backup
  • Hydraulic brake system and method with double hydraulic cylinder four-wheel failure backup

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Experimental program
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Effect test

Embodiment 1

[0036] The system designed by the invention can fully reflect the driver's intention and provide braking force. Such as figure 2 As shown, the specific implementation process is: during the normal running of the car, when the driver manipulates the brake pedal 1, the electronic control unit ECU45 can judge the brake operation, and know the driver's brake pedal through the displacement sensor 2, vehicle speed and other information. The intention is to drive the normally closed valve 7 to switch from the normally closed state to the open state, and the brake fluid in the rear chamber B of the manpower cylinder will enter the stroke simulator under the action of manpower, providing the driver with an approximate real pedal feeling , so that the driver performs braking operations according to habits and experience, thereby improving driving comfort. And according to the braking intention, at the same time according to the motor speed, battery SOC and motor output braking torque,...

Embodiment 2

[0038] The present invention adopts No. 1 motor 12 to generate active force to push the piston to work, so as to quickly and accurately control the pressure in the brake wheel cylinders of the left and right wheels to generate braking force. Such as image 3 As shown, its specific implementation process is: when a certain amount of brake pressure needs to be increased in the brake wheel cylinder, the electronic control unit ECU45 according to the pressure signals of the second pressure sensor 9 and the third pressure sensor 13 The signal from the sensor controls the No. 1 motor 12 to start working, and the acting torque is transmitted to the ball screw 11. The ball screw 11 converts the rotational motion into an axial linear motion, and pushes the piston to move, thereby increasing the pressure of the brake fluid, and the first constant The valve 18, the second normally closed valve 23, the third normally closed valve 25, and the fourth normally closed valve 30 are switched to...

Embodiment 3

[0040] The automobile braking system designed by the present invention can realize time-sharing control by controlling the No. more effective. Such as Figure 4 As shown, the specific implementation process is: in the braking system, each wheel cylinder is equipped with a pressure sensor, so the electronic control unit ECU45 can detect the actual pressure of the wheel cylinder according to the signal fed back by the pressure sensor, so as to control the front and rear The solenoid valve of the wheel cylinder regulates the brake fluid pressure of the wheel cylinder. For example: when the electronic control unit ECU45 judges that the brake pressure of the left front wheel brake cylinder has not reached the target value, the brake pressure of the right front wheel brake wheel cylinder exceeds the target value, and the pressure of the rear wheel brake wheel cylinder meets the target value Time-sharing control will be carried out. For controlling the pressure in the brake wheel ...

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Abstract

The invention discloses a hydraulic brake system and method with a double hydraulic cylinder four-wheel failure backup. The hydraulic brake system comprises a hydraulic control unit (HCU), a brake pedal, a manpower cylinder, a liquid storage tank, a stroke simulator, a main cylinder, a ball screw, a first motor, an electronic control unit (ECU), a plurality of connecting pieces, a solenoid valve, a sensor and a brake. According to the hydraulic brake system with the double hydraulic cylinder four-wheel failure backup, the idea of more reliable and safer braking and quicker and more accurate control is embodied.

Description

technical field [0001] The invention belongs to the technical field of automobile brake systems, and in particular relates to a hydraulic brake system and method with dual hydraulic cylinders and four-wheel failure backup. Background technique [0002] Driving safety, energy conservation and environmental protection are three important issues that the automobile industry needs to solve at present. With the development of society and the improvement of people's living standards, the number of cars owned by people continues to increase, and people are increasingly keen on cars with high speeds, so the issue of car safety is becoming increasingly important. And in automobile safety, braking problem is the most critical. The automobile braking system is one of the four parts of the automobile chassis. It is of great significance to ensure the safety of the automobile. The designed braking system needs to achieve safe, stable and reliable functions. [0003] Nowadays, in the au...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60T13/66B60T17/18
CPCB60T13/66B60T17/18
Inventor 吴坚张肖栋刘海贞何睿邓伟文
Owner JILIN UNIV
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