Emergency hydraulic braking system of vehicle

Abstract

The utility model discloses a vehicle emergency hydraulic braking system, and relates to the technical field of mechanical engineering. Comprising a first brake, a first brake unit, a power assisting unit, a brake master cylinder and a brake pedal. The first braking unit comprises a first energy accumulator and a first electromagnetic one-way valve; a liquid outlet of the first energy accumulator is connected with a first electromagnetic one-way valve, and the first electromagnetic one-way valve is connected to a first brake through a pipeline; the first brake is connected with the ABS control valve, the ABS control valve is connected with the brake master cylinder, and the brake master cylinder is connected with the brake pedal; by opening the first electromagnetic one-way valve, hydraulic oil in the first energy accumulator is output to the first brake, and braking force is provided for the first brake; the power assisting unit comprises a second energy accumulator and a second electromagnetic one-way valve; the second energy accumulator is connected with a second electromagnetic one-way valve, and the second electromagnetic one-way valve is connected between the brake master cylinder and the brake pedal; and the hydraulic oil in the second energy accumulator is output to the brake master cylinder to provide part of brake power for the brake pedal.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical engineering, and in particular relates to a vehicle emergency hydraulic braking system. Background Art

[0002] The brake pedal is a device that generates braking torque under external force by fixing a wheel or disc on the high-speed shaft of the machine and installing a corresponding brake shoe, belt or disc on the machine base. When the driver presses the brake pedal, pressure is applied to the brake device, generating braking torque, which slows down or stops the vehicle.

[0003] When the brake pedal is pressed, the hydraulic oil will enter each brake through the master brake cylinder, and the wheels will be controlled by the brakes to brake. However, in the process of high-pressure brake fluid being transmitted to the brakes, if the pipeline between the master brake cylinder and the brakes leaks, the brake pedal will feel weak or even have no braking force; if the vacuum booster pump fails, the brake pressure plate will feel hard or even have no braking force. The occurrence of the above two situations will lead to reduced braking efficiency or even failure, which is very likely to cause major safety hazards when emergency braking is required. Utility Model Content

[0004] The utility model provides a vehicle emergency hydraulic brake system to solve the problem that when the brake line leaks, the brake pedal will feel weak or even have no braking force when the foot is pressed on the brake; when the vacuum booster pump fails, the brake pressure plate will feel hard or even have no braking force when the foot is pressed.

[0005] The technical solution adopted by this utility model is:

[0006] A vehicle emergency hydraulic braking system for braking wheels, comprising a first brake, a first brake unit, a power assist unit, a master brake cylinder, and a brake pedal;

[0007] The first brake unit includes a first accumulator and a first electromagnetic one-way valve; a fluid outlet of the first accumulator is connected to the first electromagnetic one-way valve, which is connected to the first brake via a pipeline; the first brake is connected to an ABS control valve, which is connected to a master brake cylinder, which is connected to a brake pedal; the first accumulator and the first electromagnetic one-way valve are configured such that, in the event of a failure of the master brake cylinder, the first electromagnetic one-way valve is opened to allow hydraulic oil in the first accumulator to be output to the first brake, thereby providing braking force to the first brake;

[0008] The power assist unit includes a second accumulator and a second electromagnetic one-way valve; the fluid outlet of the second accumulator is connected to the second electromagnetic one-way valve, and the second electromagnetic one-way valve is connected between the master brake cylinder and the ABS control valve through a pipeline. The second accumulator and the second one-way valve are configured so that when the vacuum booster pump fails, the second electromagnetic one-way valve is opened to allow the hydraulic oil in the second accumulator to be output to the master brake cylinder, thereby providing partial braking assistance to the brake pedal.

[0009] The vehicle emergency hydraulic brake system of the utility model also has the following additional technical features:

[0010] The hydraulic emergency brake system also includes a second brake and a second brake unit; the first brake and the second brake are arranged in parallel and connected to the ABS control valve; the second brake unit is connected to the second brake and can provide braking force to the second brake.

[0011] The second brake unit includes a third accumulator and a third solenoid one-way valve; the fluid outlet of the third accumulator is connected to the third solenoid one-way valve, and the third solenoid one-way valve is connected to the second brake through a pipeline; the third accumulator and the third solenoid one-way valve are configured so that when the master brake cylinder fails, the third solenoid one-way valve is opened, so that the hydraulic oil in the third accumulator is output to the second brake, providing braking power for the second brake.

[0012] One side of the fluid outlet end of the master brake cylinder is connected to a main pipeline, and one side of the fluid inlet end of the master brake cylinder is connected to the brake pedal through a hydraulic pipeline.

[0013] The first brake is connected to the ABS control valve through a first pipeline, and the ABS control valve is connected to the master brake cylinder through a main pipeline; the first accumulator is connected to the first pipeline through a first brake pipeline, a first electromagnetic one-way valve is connected to the first brake pipeline, and a first normally open electromagnetic valve is connected to the first pipeline.

[0014] The second brake is connected to the ABS control valve through a second pipeline; the third accumulator is connected to the second pipeline through a second brake pipeline, a third electromagnetic one-way valve is connected to the second brake pipeline, and a second normally open electromagnetic valve is connected to the second pipeline.

[0015] The fluid outlet of the master brake cylinder is connected to a first pressure sensor, which is used to detect the pressure value of the hydraulic oil output from the fluid outlet of the master brake cylinder.

[0016] The brake pedal is connected to a displacement sensor, and the displacement sensor detects the movement distance of the brake pedal.

[0017] The brake pedal is further connected to a second pressure sensor, which is used to detect the pressure of the brake pedal.

[0018] The second accumulator is a hydraulic accumulator or a bladder accumulator.

[0019] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0020] 1. The present application relates to a vehicle emergency hydraulic brake system for braking wheels, comprising a first brake, a first brake unit, a power assist unit, a master brake cylinder, and a brake pedal. The first brake is connected to an ABS control valve, which is connected to the master brake cylinder, which is connected to the brake pedal. When braking a wheel, hydraulic oil in the master brake cylinder flows into the first brake by depressing the brake pedal to brake the wheel. When the master brake cylinder fails, the first brake unit is connected to the first brake, and thus braking force can be promptly provided to the first brake by the first brake unit. Specifically, the first brake unit comprises a first accumulator and a first solenoid check valve. A fluid outlet of the first accumulator is connected to the first solenoid check valve, which is connected to the first brake via a pipeline. The first accumulator and the first solenoid check valve are configured such that, when the master brake cylinder fails, the first solenoid check valve is opened, allowing hydraulic oil in the first accumulator to be discharged to the first brake, thereby providing braking force for the first brake.

[0021] The vacuum booster pump is connected to the brake pedal, usually providing vacuum power for the brake pedal, thereby reducing the pedal force when the brake pedal is stepped on, avoiding a hard feel of the brake pedal, and connecting the booster unit between the master brake cylinder and the brake pedal. The purpose is that when the vacuum booster pump fails, the second electromagnetic one-way valve is opened, so that the hydraulic oil in the second accumulator can flow through the ABS control valve to the first pipeline and the second pipeline described below, flow through the first pipeline to the first controller, and flow through the second pipeline to the second controller described below, thereby realizing the first controller and the second controller. The brake provides braking force, which is also indirectly equivalent to assisting the brake pedal and the master brake cylinder, thereby increasing the ease of stepping on the pedal and improving the user experience; specifically, the power assist unit includes a second accumulator and a second solenoid one-way valve; the fluid outlet of the second accumulator is connected to the second solenoid one-way valve, and the second solenoid one-way valve is connected to the master brake cylinder and the ABS control valve through a pipeline. The second accumulator and the second one-way valve are configured to enable the hydraulic oil in the second accumulator to be output to the first brake by opening the second solenoid one-way valve when the vacuum booster pump fails, thereby providing braking force for the first brake.

[0022] 2. As a preferred embodiment of the present invention, the hydraulic emergency brake system also includes a second brake and a second brake unit; the first brake and the second brake are arranged in parallel and connected to the ABS control valve; the second brake unit is connected to the second brake and can provide braking force to the second brake.

[0023] The second brake unit is used to be connected to the second brake, the first brake is used to control one of the wheels, and the second brake is used to control the second wheel; the second brake is connected to the second brake unit, and the second brake unit can provide braking force for the second brake when the master brake cylinder fails.

[0024] 3. As a preferred embodiment of the present invention, the second brake unit includes a third accumulator and a third solenoid one-way valve; the fluid outlet of the third accumulator is connected to the third solenoid one-way valve, and the third solenoid one-way valve is connected to the second brake through a pipeline; the third accumulator and the third solenoid one-way valve are configured so that when the master brake cylinder fails, the third solenoid one-way valve is opened, so that the hydraulic oil in the third accumulator is output to the second brake, providing braking power for the second brake.

[0025] By setting up a third accumulator and a third electromagnetic one-way valve, when the master brake cylinder fails, the third solenoid valve can be opened so that the hydraulic oil in the third accumulator can flow into the second brake to provide braking force for the second brake, thereby achieving emergency braking under failure.

[0026] 4. As a preferred embodiment of the present invention, the fluid outlet side of the master brake cylinder is connected to a main pipeline, and the fluid inlet side of the master brake cylinder is connected to the brake pedal via a hydraulic pipeline.

[0027] The main pipeline connected to the fluid outlet end of the master brake cylinder is used to output hydraulic oil to the first brake and the second brake, thereby providing braking force for the first brake and the second brake. The hydraulic pipeline connected to the fluid inlet end of the master brake cylinder is used to receive the hydraulic oil input after the brake pedal is stepped on. Under normal circumstances, the hydraulic oil will flow from the master brake cylinder to the first brake and the second brake, and braking will be performed through the first brake and the second brake.

[0028] 5. As a preferred embodiment of the present invention, the first brake is connected to the ABS control valve through the first pipeline, and the ABS control valve is connected to the master brake cylinder through the main pipeline; the first accumulator is connected to the first pipeline through the first brake pipeline, the first brake pipeline is connected to the first solenoid one-way valve, and the first pipeline is connected to the first normally open solenoid valve.

[0029] The first brake is connected to the main pipeline through the first pipeline, which is conducive to independent control of the first brake. The first accumulator is connected to the first pipeline through the first brake pipeline, so that when a problem occurs in the main pipeline, it can be connected to the first pipeline through the first brake pipeline so that the hydraulic oil flows to the first brake to provide braking force for the first brake; when the master brake pump fails, the first solenoid one-way valve is opened and the first normally open solenoid valve is closed, so that the hydraulic oil can only flow from the outlet of the first accumulator through the first solenoid one-way valve, the first brake pipeline, and the first pipeline to the first brake, thereby ensuring sufficient supply of hydraulic oil and providing sufficient braking force for the first brake. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 This is a schematic structural diagram of a vehicle emergency braking system according to one embodiment of the present invention;

[0032] In the figure,

[0033] 1. First brake; 2. First accumulator; 3. First solenoid one-way valve; 4. Second accumulator; 5. Second solenoid one-way valve; 6. Master brake cylinder; 7. Brake pedal; 8. Second brake; 9. Third accumulator; 10. Third solenoid one-way valve; 11. Main pipeline; 12. Hydraulic pipeline; 13. First pipeline; 14. Second pipeline; 15. First normally open solenoid valve; 16. Second normally open solenoid valve; 17. First brake pipeline; 18. Second brake pipeline; 19. Vacuum booster pump; 20. ABS control valve; 21. Third brake; 22. Fourth brake; 23. Vehicle control unit (VCU). DETAILED DESCRIPTION

[0034] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0035] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "embodiment", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0038] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0039] The utility model relates to a vehicle emergency hydraulic brake system, such as Figure 1 As shown, it is used for braking wheels, including a first brake 1, a first brake unit, a power-assisting unit, a master brake cylinder 6 and a brake pedal 7;

[0040] The first brake unit includes a first accumulator 2 and a first solenoid check valve 3; the first accumulator 2 has a fluid outlet connected to the first solenoid check valve 3, which is in turn connected to the first brake 1 via a pipeline; the first brake 1 is connected to an ABS control valve 20, which is in turn connected to a master brake cylinder 6, which is in turn connected to a brake pedal 7; the first accumulator 2 and the first solenoid check valve 3 are configured such that, in the event of a failure in the master brake cylinder 6, the first solenoid check valve 3 is opened, allowing hydraulic oil in the first accumulator 2 to be output to the first brake 1, thereby providing braking force for the first brake 1;

[0041] The power-boosting unit includes a second accumulator 4 and a second electromagnetic one-way valve 5; the liquid outlet of the second accumulator 4 is connected to the second electromagnetic one-way valve 5, and the second electromagnetic one-way valve 5 is connected between the brake master cylinder 6 and the ABS control valve 20 through a pipeline. The second accumulator 4 and the second one-way valve are configured so that when the vacuum booster pump 19 fails, the second electromagnetic one-way valve 5 is opened, so that the hydraulic oil in the second accumulator 4 is output to the first brake 1, thereby providing braking force for the first brake 1.

[0042] The first brake 1 is connected to the master brake cylinder 6, and the master brake cylinder 6 is connected to the brake pedal 7; when the wheel needs to be braked, the brake pedal 7 is pressed, and the hydraulic oil of the master brake cylinder 6 will enter the first brake 1 to brake the wheel; when the master brake cylinder 6 has a problem, since the first brake unit is connected to the first brake 1, the first brake unit can promptly provide braking force to the first brake 1 to brake the wheel. Specifically, the first brake unit includes a first accumulator 2 and a first solenoid one-way valve 3; the outlet of the first accumulator 2 is connected to the first solenoid one-way valve 3, and the first solenoid one-way valve 3 is connected to the first brake 1 through a pipeline; the first accumulator 2 and the first solenoid one-way valve 3 are configured so that when the master brake cylinder 6 fails, the first solenoid one-way valve 3 is opened to allow the hydraulic oil in the first accumulator 2 to be output to the first brake 1 to provide braking force for the first brake 1;

[0043] The vacuum booster pump 19 is connected to the brake pedal 7, and usually provides vacuum power for the brake pedal 7, so that the foot force can be reduced when the brake pedal 7 is stepped on, and the brake pedal 7 does not feel hard. The power unit is connected between the brake master cylinder 6 and the brake pedal 7. The purpose is that when the vacuum booster pump 19 fails, the second electromagnetic one-way valve 5 is opened, so that the hydraulic oil in the second accumulator 4 can flow through the ABS control valve 20 to the first pipeline 13 and the second pipeline 14 described below, and then flow to the first controller 1 through the first pipeline 13 and flow to the second controller 8 described below through the second pipeline 14, thereby providing braking force for the first controller 1 and the second controller 8, and also indirectly related. It is equivalent to providing power to the brake pedal 7 and the master brake cylinder 6, improving the ease of stepping on the pedal and improving the user experience; specifically, the power assist unit includes a second accumulator 4 and a second electromagnetic one-way valve 5; the fluid outlet of the second accumulator 4 is connected to the second electromagnetic one-way valve 5, and the second electromagnetic one-way valve 5 is connected to the master brake cylinder 6 and the ABS control valve through a pipeline. The second accumulator 4 and the second one-way valve are configured to be able to open the second electromagnetic one-way valve 5 when the vacuum booster pump fails, so that the hydraulic oil in the second accumulator 4 is output to the first brake 1 and the second brake 8 described below, providing braking force for the first brake 1 and the second brake 8, thereby realizing the power assist function of the brake master cylinder.

[0044] like Figure 1 As shown, the ABS control valve 20 is also connected to the third brake 21 and the fourth brake 22, controlling the output of hydraulic oil to provide braking force to the third and fourth brakes, thereby braking the corresponding wheels. During normal driving, when the brake pedal 7 is depressed, hydraulic oil from the master brake cylinder 6 flows from the outlet port into the ABS control valve 20 and then flows through pipelines to the first brake 1, the second brake 8, the third brake 21, and the fourth brake 22, respectively, thereby braking the wheels. In the event of a malfunction in the master brake cylinder 6, hydraulic oil is supplied to the first brake 1 through the first brake unit, while hydraulic oil is supplied to the second brake 8 through the second brake unit. Hydraulic oil in the first accumulator 2 of the first brake unit also flows to the ABS control valve 20. Hydraulic oil in the second accumulator 4 of the second brake unit, described below, flows to the ABS control valve 20 in addition to the second brake, providing braking force to the third brake 21 and the fourth brake 22, thereby braking all four wheels. When the vacuum booster pump fails, the hydraulic oil flows from the second accumulator 4 in the booster unit to the ABS control valve 20, and the hydraulic oil flows to the first pipeline 13, the second pipeline 14 and the pipelines connected to the third brake and the fourth brake through the ABS control valve 20, respectively, to provide braking force for the first brake 1, the second brake 8, the third brake 21 and the fourth brake 22.

[0045] In addition, the first solenoid check valve 3, the second solenoid check valve 5, the third solenoid check valve 10, the first normally open solenoid valve 15, and the second normally open solenoid valve 16 are each connected to the vehicle control unit (VCU). The opening and closing of these valves are controlled by the vehicle control unit (VCU) 23 in the vehicle. As the central control unit of the energy vehicle, the VCU is the core of the entire system. The VCU collects motor and battery status information, and also collects accelerator pedal signals, brake pedal signals, actuator, and sensor signals through its own I / O ports.

[0046] As a preferred embodiment, the hydraulic emergency brake system also includes a second brake 8 and a second brake unit; the first brake 1 is arranged in parallel with the second brake 8 and is connected to the ABS control valve 20; the second brake unit is connected to the second brake 8 and can provide braking force to the second brake 8.

[0047] The second brake unit is used to be connected to the second brake 8, the first brake 1 is used to control one of the wheels, and the second brake 8 is used to control the second wheel; the second brake 8 is connected to the second brake unit, and the second brake unit can provide braking force to the second brake 8 when the master brake cylinder 6 fails.

[0048] Furthermore, the second brake unit includes a third accumulator 9 and a third solenoid one-way valve 10; the fluid outlet of the third accumulator 9 is connected to the third solenoid one-way valve 10, and the third solenoid one-way valve 10 is connected to the second brake 8 through a pipeline; the third accumulator 9 and the third solenoid one-way valve 10 are configured to open the third solenoid one-way valve 10 when the master brake cylinder 6 fails, so that the hydraulic oil in the third accumulator 9 is output to the second brake 8, providing braking power for the second brake 8.

[0049] By setting up the third accumulator 9 and the third electromagnetic one-way valve 10, when the master brake cylinder 6 fails, the third electromagnetic valve can be opened so that the hydraulic oil in the third accumulator 9 can flow to the second brake 8 to provide braking force for the second brake 8, thereby realizing emergency braking under fault conditions.

[0050] As a preferred embodiment, the fluid outlet side of the master brake cylinder 6 is connected to the main pipeline 11 , and the fluid inlet side of the master brake cylinder 6 is connected to the brake pedal 7 through a hydraulic pipeline 12 .

[0051] The main pipeline 11 connected to the fluid outlet end of the master brake pump 6 is used to output hydraulic oil to the first brake 1 and the second brake 8, thereby providing braking force for the first brake 1 and the second brake 8. The hydraulic pipeline 12 connected to the fluid inlet end of the master brake pump 6 is used to receive the hydraulic oil input after the brake pedal 7 is stepped on. Under normal circumstances, the hydraulic oil will flow from the master brake pump 6 to the first brake 1 and the second brake 8, and braking will be performed through the first brake 1 and the second brake 8.

[0052] As a preferred embodiment, the first brake 1 is connected to the ABS control valve through the first pipeline 13, and the ABS control valve is connected to the master brake cylinder 6 through the main pipeline 11; the first accumulator 2 is connected to the first pipeline 13 through the first brake pipeline 17, the first brake pipeline 17 is connected to the first solenoid one-way valve 3, and the first pipeline 13 is connected to the first normally open solenoid valve 15.

[0053] The first brake 1 is connected to the main pipeline 11 through the first pipeline 13, which is conducive to independent control of the first brake 1. The first accumulator 2 is connected to the first pipeline 13 through the first brake pipeline 17, so that when a problem occurs in the main pipeline 11, it can be connected to the first pipeline 13 through the first brake pipeline 17, so that the hydraulic oil in the first accumulator 2 flows to the first brake 1 to provide braking force for the first brake 1; when the master brake pump 6 fails, the first solenoid one-way valve 3 is opened and the first normally open solenoid valve 15 is closed, so that the hydraulic oil can only flow from the outlet of the first accumulator 2 through the first solenoid one-way valve 3, the first brake pipeline 17, and the first pipeline 13 to the first brake 1, ensuring sufficient supply of hydraulic oil and providing sufficient braking force for the first brake 1.

[0054] As a preferred embodiment, the second brake 8 is connected to the ABS control valve through the second pipeline 14; the main pipeline 11 is connected to the master brake cylinder 6; the third accumulator 9 is connected to the second pipeline 14 through the second brake pipeline 18, the second brake pipeline 18 is connected to the third solenoid one-way valve 10, and the second pipeline 14 is connected to the second normally open solenoid valve 16.

[0055] The second brake 8 is connected to the main pipeline 11 through the second pipeline 14, which is conducive to separate control of the second brake 8. The third accumulator 9 is connected to the second pipeline 14 through the second brake pipeline 18, so that when a problem occurs in the main pipeline 11, it can be connected to the second pipeline 14 through the second brake pipeline 18, so that the hydraulic oil flows to the second brake 8 to provide braking force for the second brake 8; when the master brake pump 6 fails, the third solenoid one-way valve 10 is opened and the second normally open solenoid valve 16 is closed, so that the hydraulic oil in the third accumulator 9 can only flow from the outlet of the third accumulator 9 through the third solenoid one-way valve 10, the second brake pipeline 18 and the second pipeline 14 to the second brake 8, ensuring sufficient supply of hydraulic oil and providing sufficient braking force for the second brake 8.

[0056] As a preferred embodiment, the fluid outlet of the master brake cylinder 6 is connected to a first pressure sensor, and the first pressure sensor is used to detect the pressure value of the hydraulic oil output from the fluid outlet of the master brake cylinder 6 .

[0057] The first pressure sensor connected to the fluid outlet of the master brake cylinder 6 can upload the measured pressure value of the hydraulic oil to the controller. The controller compares and determines whether the master brake cylinder 6 is in a fault stage according to the standard data. If it is in a fault stage, the controller controls the first solenoid one-way valve 3 to open, the first normally open solenoid valve 15 to close, the third solenoid one-way valve 10 to open and the second normally open solenoid valve 16 to close, so that the hydraulic oil of the first accumulator 2 flows through the first brake 1 through the first solenoid one-way valve 3, and the hydraulic oil of the third accumulator 9 flows through the second brake 8 through the third solenoid one-way valve 10, and the braking continues to be completed smoothly.

[0058] As a preferred embodiment, the brake pedal 7 is connected to a displacement sensor, and the movement distance of the brake pedal 7 is detected by the displacement sensor.

[0059] The displacement sensor connected to the brake pedal 7 is used to detect the movement distance of the brake pedal 7, upload the movement distance data to the controller, and compare it with the standard movement distance value through the controller to determine whether there is a fault in the vacuum booster pump.

[0060] As a preferred embodiment, the brake pedal 7 is further connected to a second pressure sensor, and the second pressure sensor is used to detect the pressure of the brake pedal 7 .

[0061] The brake pedal 7 also has a second pressure sensor for detecting the pressure of the brake pedal 7. The data of the pressure sensor and the moving distance are uploaded to the controller. The controller comprehensively judges whether there is a fault in the vacuum booster pump based on the data, thereby starting the second electromagnetic one-way valve 5 to open, and the hydraulic oil in the second accumulator 4 flows to the master brake cylinder 6 to provide braking power for the brake pedal 7.

[0062] As a preferred embodiment, the second accumulator 4 is a hydraulic accumulator or a bladder accumulator.

[0063] Anything not described in this utility model can be achieved by adopting or drawing on existing technologies.

[0064] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0065] The above description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims of the present invention.

Claims

1. A vehicle emergency hydraulic braking system for braking wheels, characterized in that: It includes a first brake, a first brake unit, a power-assisting unit, a master brake cylinder, and a brake pedal; The first brake unit includes a first accumulator and a first electromagnetic one-way valve; a fluid outlet of the first accumulator is connected to the first electromagnetic one-way valve, which is connected to the first brake via a pipeline; the first brake is connected to an ABS control valve, which is connected to a master brake cylinder, which is connected to a brake pedal; the first accumulator and the first electromagnetic one-way valve are configured such that, in the event of a failure of the master brake cylinder, the first electromagnetic one-way valve is opened to allow hydraulic oil in the first accumulator to be output to the first brake, thereby providing braking force to the first brake; The power-boosting unit includes a second accumulator and a second electromagnetic one-way valve; the fluid outlet of the second accumulator is connected to the second electromagnetic one-way valve, and the second electromagnetic one-way valve is connected between the master brake cylinder and the ABS control valve through a pipeline; the second accumulator and the second one-way valve are configured so that when the vacuum power-boosting pump fails, the second electromagnetic one-way valve is opened, so that the hydraulic oil in the second accumulator is output to the first brake to provide braking force for the first brake.

2. A vehicle emergency hydraulic brake system according to claim 1, characterized in that: It also includes a second brake and a second brake unit; the first brake and the second brake are arranged in parallel and connected to the ABS control valve; the second brake unit is connected to the second brake and can provide braking force to the second brake.

3. A vehicle emergency hydraulic brake system according to claim 2, characterized in that: The second brake unit includes a third accumulator and a third solenoid one-way valve; the fluid outlet of the third accumulator is connected to the third solenoid one-way valve, and the third solenoid one-way valve is connected to the second brake through a pipeline; the third accumulator and the third solenoid one-way valve are configured so that when the master brake cylinder fails, the third solenoid one-way valve is opened, so that the hydraulic oil in the third accumulator is output to the second brake, providing braking force for the second brake.

4. A vehicle emergency hydraulic brake system according to claim 3, characterized in that: One side of the fluid outlet end of the master brake cylinder is connected to a main pipeline, and one side of the fluid inlet end of the master brake cylinder is connected to the brake pedal through a hydraulic pipeline.

5. The vehicle emergency hydraulic braking system according to claim 3, characterized in that: The second brake is connected to the ABS control valve through a second pipeline; the third accumulator is connected to the second pipeline through a second brake pipeline, a third electromagnetic one-way valve is connected to the second brake pipeline, and a second normally open electromagnetic valve is connected to the second pipeline.

6. A vehicle emergency hydraulic brake system according to claim 4, characterized in that: The first brake is connected to the ABS control valve through a first pipeline, and the ABS control valve is connected to the master brake cylinder through a main pipeline; the first accumulator is connected to the first pipeline through a first brake pipeline, a first electromagnetic one-way valve is connected to the first brake pipeline, and a first normally open electromagnetic valve is connected to the first pipeline.

7. The vehicle emergency hydraulic brake system according to claim 1, characterized in that: The fluid outlet of the master brake cylinder is connected to a first pressure sensor, which is used to detect the pressure value of the hydraulic oil output from the fluid outlet of the master brake cylinder.

8. The vehicle emergency hydraulic braking system according to claim 1, characterized in that: The brake pedal is connected to a displacement sensor, and the displacement sensor detects the movement distance of the brake pedal.

9. The vehicle emergency hydraulic brake system according to claim 1, characterized in that: The brake pedal is further connected to a second pressure sensor, which is used to detect the pressure of the brake pedal.

10. The vehicle emergency hydraulic brake system according to claim 1, characterized in that: The second accumulator is a hydraulic accumulator or a bladder accumulator.

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