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Braking system with redundancy design and control method

A brake system and redundant technology, applied in the direction of brake safety system, brake, brake transmission device, etc., to achieve the effect of improving noise performance

Pending Publication Date: 2021-11-02
WUHU BETHEL ELECTRONICS CONTROL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the prior art, in order to generate a sufficiently fast supercharging speed during pressurization, the power and torque of the brushless motor 16 are required to be large enough and to respond quickly; in addition, when the automatic driving level is L3 and above, this technical solution requires additional redundancy Electronically controlled braking, such as wheel-end EPB braking, or the system needs to add an additional electronic control redundancy unit

Method used

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  • Braking system with redundancy design and control method
  • Braking system with redundancy design and control method
  • Braking system with redundancy design and control method

Examples

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Effect test

Embodiment 1

[0065] Such as figure 1 and 2 As mentioned above, this embodiment provides a braking system with a redundant design, including a master cylinder with a liquid storage tank assembly A, a hydraulic unit B for electronically controlled braking, and a control unit C for electronically controlled braking; The dynamic hydraulic unit B includes two pressure generating devices, both of which are hydraulically connected to the four wheel end brakes and the master cylinder with liquid storage tank assembly A; the master cylinder with liquid storage tank assembly A Including a travel sensor 2, a master cylinder 3, and a liquid storage tank 4; a normally open solenoid valve and a normally closed solenoid valve are respectively arranged on the hydraulic pipeline of the wheel end brake, and the normally closed solenoid valve is connected to the hydraulic pipeline of the wheel end brake To the liquid storage tank one 4; the control unit C includes two electric control units, one of which c...

Embodiment 2

[0091] This embodiment provides a control method of a redundantly designed braking system. During high-intensity braking (the deceleration requirement in the braking process is ≥0.6g; g is the unit of gravitational acceleration.), the two pressure generating devices of the system Work simultaneously under the control of the control unit C to increase the boosting speed of the braking system.

Embodiment 3

[0093] This embodiment provides a control method for the braking system with redundant design. When the anti-lock braking function (that is, the ABS function) is triggered during emergency braking, when the wheel end solenoid valve of the hydraulic unit B of the electronically controlled braking works The required pressure oil is provided by the booster cylinder 12; when the liquid volume of the booster cylinder 12 is consumed to a certain extent (for example, 80% is consumed), the pump 17 and the pump 2 18 drive the pump 17 and the pump 2 18 The motor 16 on the top and the solenoid valve 17a and solenoid valve 2 18a that respectively control and adjust the outlet pressure of pump one 17 and pump two 18 form a pressure generating device as a hydraulic source for the anti-lock function.

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Abstract

The invention aims to provide a brake system with redundancy design and a control method. A master cylinder with a liquid storage tank assembly is separated from an electric control braking system; a hydraulic unit of the electric control braking system is provided with two pressure generating devices; an electric control unit is provided with a double-control ECU; a wheel end electromagnetic valve in the hydraulic unit of the electric control braking system realizes backup redundancy under the control of the double-control ECU; and the main cylinder of the whole system is simple in structure, the power and the torque of the motor are reduced, and the number of the system electromagnetic valves is only 15.

Description

technical field [0001] The invention relates to the field of vehicle braking, in particular to a redundantly designed braking system and a control method. Background technique [0002] The boost of the traditional automobile braking system is to use the vacuum generated by the engine or the vacuum generated by the electronic vacuum pump to realize the brake pressure build-up in the vacuum booster. as attached image 3 Shown, serial number 4 is described vacuum booster. When the driver brakes, the brake pedal 6 is stepped on, and the brake master cylinder 3 is driven to pass through the electronically controlled pressure regulating unit ABS / ESC2 to build up pressure on the brake 1 to generate brake fluid pressure; a vacuum booster is needed for the pedal during this process. The force is proportionally amplified, so that the driver can achieve the braking force that meets the braking requirements of the whole vehicle under the appropriate pedal feeling force. [0003] With ...

Claims

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Application Information

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IPC IPC(8): B60T17/18B60T13/74
CPCB60T17/18B60T13/745
Inventor 徐文泉袁永彬
Owner WUHU BETHEL ELECTRONICS CONTROL SYST
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