Electronic hydraulic braking device matched with anti-lock braking system

Abstract

The utility model relates to the field of formulating systems, in particular to an electronic hydraulic brake device matched with an anti-lock brake system, which comprises a hydraulic pump, a power-assisted brake pressure generator and a hydraulic damper, an oil way is communicated between the hydraulic pump and the power-assisted brake pressure generator, and the hydraulic damper is communicated with the oil way. A hydraulic damper is additionally arranged in an oil way between the hydraulic pump and the power-assisted brake pressure generator, and an elastic element is arranged in the hydraulic damper. When pressure impact is generated in the ABS working condition, the internal elastic element deforms to a certain degree, the peak value of the pressure impact is reduced, damage to the system caused by high pressure is avoided, and therefore the reliability of the system is improved.

Description

Technical Field

[0001] The present application relates to the field of braking systems, and particularly to an electro-hydraulic braking device matching an anti-lock braking system. Background Art

[0002] Electro-hydraulic braking systems are widely used in the automotive field and can provide safe and efficient braking performance. With the development of automotive technology, electro-hydraulic braking devices are continuously optimized to adapt to more complex and changeable driving environments and play an important role in improving driving safety and vehicle stability. Especially in the application scenario of the anti-lock braking system (ABS), it can effectively prevent wheel lock-up, improve the controllability and stability of the vehicle in the emergency braking state, and thus ensure driving safety.

[0003] To achieve the ABS function, existing electro-hydraulic braking devices usually adopt a hydraulic pump, a power-assisted braking pressure generator, and related control strategies to work together.

[0004] When the system suddenly enters the ABS working condition in the normal power-assisted mode, a common method is to pump the brake fluid back to the circuit before the braking pressure generator through the hydraulic pump to adjust the braking pressure and prevent wheel lock-up.

[0005] However, when the hydraulic pump is started to pump the brake fluid back to the system circuit, due to the high hydraulic stiffness of this circuit, a very high pressure shock will be caused by excessive resistance at the start moment. This shock not only generates a large load on the hydraulic components and transmission components in the system, but also increases the risk of damage. Summary of the Utility Model

[0006] To reduce the peak value of the pressure shock under the ABS working condition, the present application provides an electro-hydraulic braking device matching an anti-lock braking system.

[0007] The electro-hydraulic braking device matching an anti-lock braking system provided by the present application adopts the following technical solutions:

[0008] An electro-hydraulic braking device matching an anti-lock braking system includes a hydraulic pump, a power-assisted braking pressure generator, and a hydraulic damper.

[0009] An oil circuit is connected between the hydraulic pump and the power-assisted braking pressure generator.

[0010] The hydraulic damper is connected to the oil circuit.

[0011] By adopting the above technical solution, a hydraulic damper is added to the oil circuit between the hydraulic pump and the power-assisted braking pressure generator, and an elastic element is provided inside the hydraulic damper. When a pressure shock occurs under the ABS condition, the internal elastic element deforms to a certain extent, reducing the peak value of the pressure shock and avoiding damage to the system caused by high pressure, thereby improving the reliability of the system.

[0012] Preferably, it further includes an electric cylinder isolation valve.

[0013] The electric cylinder isolation valve is connected to the oil circuit, and the electric cylinder isolation valve is located between the hydraulic pump and the hydraulic damper.

[0014] By adopting the above technical solution, it is possible to further control the pressure transmission of the hydraulic system under the ABS condition, improving the stability and reliability of the system.

[0015] Preferably, there are two hydraulic pumps, oil circuits, and electric cylinder isolation valves respectively, and the hydraulic pumps, oil circuits, and electric cylinder isolation valves correspond to each other one by one.

[0016] By adopting the above technical solution, the stability and fault redundancy ability of the system are enhanced.

[0017] Preferably, a pressure sensor is connected to the oil circuit between the hydraulic damper and the power-assisted braking pressure generator.

[0018] By adopting the above technical solution, the pressure change of the oil circuit is monitored in real time, the pressure information is fed back in a timely manner, further ensuring the stable operation of the system and effectively reducing the pressure shock under the ABS condition, and improving the reliability and safety of the system.

[0019] Preferably, it further includes a master cylinder and a master cylinder isolation valve.

[0020] The master cylinder is connected to the oil circuit through the master cylinder isolation valve.

[0021] The connection between the master cylinder isolation valve and the oil circuit is located between the hydraulic pump and the hydraulic damper.

[0022] Preferably, a pressure sensor is connected between the master cylinder and the master cylinder isolation valve.

[0023] By adopting the above technical solution, the pressure change of the master cylinder is monitored in real time, the working state of the braking system is adjusted in a timely manner, and the stability and reliability of the system are further improved.

[0024] Preferably, there are two hydraulic pumps and master cylinder isolation valves respectively, and the hydraulic pumps and master cylinder isolation valves correspond to each other one by one.

[0025] By adopting the above technical solution, the stability and fault redundancy ability of the system are enhanced.

[0026] Preferably, it further includes a pedal travel simulator.

[0027] The pedal travel simulator is connected to the master cylinder.

[0028] By adopting the above technical solution, in the braking systems of hybrid electric vehicles and electric vehicles, the pedal travel simulator is used to simulate the travel and feel of the braking pedal of a conventional vehicle, so as to provide a familiar driving experience for the driver and achieve energy recovery and improve braking safety.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. By adding a hydraulic damper in the circuit between the hydraulic pump and the power-assisted braking pressure generator, the high-pressure impact generated instantaneously during the start under ABS conditions is effectively reduced, thereby reducing the loads on the hydraulic components and transmission components in the system and reducing the risk of damage;

[0031] 2. The application of the hydraulic damper reduces the hydraulic stiffness of the circuit between the hydraulic pump and the power-assisted braking pressure generator. Especially under high-pressure conditions, the peak value of the pressure impact is further alleviated, and the reliability and stability of the system are improved;

[0032] 3. By adding a pressure sensor on the oil path between the hydraulic damper and the power-assisted braking pressure generator, the pressure change can be monitored in real time, which helps to adjust the control system strategy in a timely manner and further reduces the impact of the pressure shock on the entire braking system. Description of the Drawings

[0033] Figure 1 is the schematic diagram of this embodiment.

[0034] Description of the reference numerals: 100, EHB braking electronic booster; 200, ABS anti-lock braking system;

[0035] 1, oil pot; 2, simulator valve; 3, master cylinder; 4, displacement sensor; 5, pedal travel simulator; 6, pressure sensor; 7, master cylinder isolation valve; 8, electric cylinder isolation valve; 9, hydraulic damper; 10, power-assisted braking pressure generator; 11, hydraulic pump. Detailed Embodiments

[0036] The following further describes the present application in detail with reference to the drawings.

[0037] Refer to Figure 1 , the embodiment of the present application discloses an electro-hydraulic braking device matching an anti-lock braking system, which includes an EHB braking electronic booster 100 and an ABS anti-lock braking system 200.

[0038] The EHB braking electronic booster 100 includes an oil pot 1, a master cylinder 3 and a displacement sensor 4.

[0039] The oil pot 1 stores brake fluid. The master cylinder 3 is connected to the oil pot 1, and the master cylinder 3 is also used to connect to the brake pedal. The displacement sensor 4 is connected to the master cylinder 3 to detect the displacement of the brake pedal.

[0040] The EHB brake electronic booster 100 further includes a pedal travel simulator 5 and a simulator valve 2.

[0041] The pedal travel simulator 5 is connected to the master cylinder 3 and is used to simulate the travel and feel of the brake pedal of a conventional vehicle. The pedal travel simulator 5 is connected to the oil pot 1 through the simulator valve 2.

[0042] The EHB brake electronic booster 100 further includes a power-assisted brake pressure generator 10 and a hydraulic damper 9. The ABS anti-lock braking system 200 includes a hydraulic pump 11.

[0043] There is an oil circuit connected between the hydraulic pump 11 and the power-assisted brake pressure generator 10. The hydraulic damper 9 is connected to the oil circuit.

[0044] The oil circuit between the hydraulic pump 11 and the hydraulic damper 9 is connected to an electric cylinder isolation valve 8; the oil circuit between the hydraulic damper 9 and the power-assisted brake pressure generator 10 is connected to a pressure sensor 6.

[0045] There are two hydraulic pumps 11, and two oil circuits, electric cylinder isolation valves 8, and hydraulic dampers 9 are correspondingly provided. The two oil circuits are connected between the hydraulic damper 9 and the power-assisted brake pressure generator 10.

[0046] Two master cylinder isolation valves 7 are respectively connected between the master cylinder 3 and the two oil circuits; the connection between the master cylinder isolation valve 7 and the oil circuit is located between the hydraulic pump 11 and the hydraulic damper 9. A pressure sensor 6 is connected between one master cylinder isolation valve 7 and the master cylinder 3.

[0047] The implementation principle of an electronic hydraulic braking device matching an anti-lock braking system in an embodiment of the present application is that by adding a hydraulic damper 9 to the circuit between the hydraulic pump 11 and the power-assisted brake pressure generator 10, the high-pressure impact generated instantaneously at startup under ABS conditions is effectively reduced, thereby reducing the loads on the hydraulic components and transmission components in the system and reducing the risk of damage.

[0048] The above are all the preferred embodiments of the present application. The protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. An electronic hydraulic braking device matching an anti-lock braking system, characterized in that, It includes a hydraulic pump (11), an assist braking pressure generator (10) and a hydraulic damper (9). There is an oil circuit connected between the hydraulic pump (11) and the assist braking pressure generator (10). The hydraulic damper (9) is connected to the oil circuit.

2. An electronic hydraulic braking device matching an anti-lock braking system according to claim 1, characterized in that, It further includes an electric cylinder isolation valve (8). The electric cylinder isolation valve (8) is connected to the oil circuit, and the electric cylinder isolation valve (8) is located between the hydraulic pump (11) and the hydraulic damper (9).

3. An electronic hydraulic braking device matching an anti-lock braking system according to claim 2, characterized in that, There are two hydraulic pumps (11), oil circuits and electric cylinder isolation valves (8) respectively, and the hydraulic pumps (11), oil circuits and electric cylinder isolation valves (8) correspond to each other one by one.

4. An electronic hydraulic braking device matching an anti-lock braking system according to claim 1 or 2 or 3, characterized in that, A pressure sensor (6) is connected to the oil circuit between the hydraulic damper (9) and the assist braking pressure generator (10).

5. An electronic hydraulic braking device matching an anti-lock braking system according to claim 1, characterized in that, It further includes a master cylinder (3) and a master cylinder isolation valve (7). The master cylinder (3) is connected to the oil circuit through the master cylinder isolation valve (7). The connection between the master cylinder isolation valve (7) and the oil circuit is located between the hydraulic pump (11) and the hydraulic damper (9).

6. An electronic hydraulic braking device matching an anti-lock braking system according to claim 5, characterized in that, A pressure sensor (6) is connected between the master cylinder (3) and the master cylinder isolation valve (7).

7. An electronic hydraulic braking device matching an anti-lock braking system according to claim 5, characterized in that, There are two hydraulic pumps (11) and master cylinder isolation valves (7) respectively, and the hydraulic pumps (11) and master cylinder isolation valves (7) correspond to each other one by one.

8. An electronic hydraulic braking device matching an anti-lock braking system according to claim 5, characterized in that, It further includes a pedal travel simulator (5). The pedal travel simulator (5) is connected to the master cylinder (3).

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