Vehicle body electronic stabilization system and vehicle

Abstract

The utility model relates to a vehicle body electronic stabilization system and a vehicle. The vehicle body electronic stabilization system includes: a brake master cylinder; the first pressure buildup loop is arranged to extract brake fluid from the brake master cylinder for pressure buildup during active pressure buildup and pump the brake fluid to wheel cylinders on the two sides of the first axle, and the first pressure buildup loop is provided with a first hydraulic control valve located at the first axle and communicated with the brake master cylinder, and a second hydraulic control valve located at the second axle and communicated with the brake master cylinder; the first hydraulic control valve is set to be closed when active pressure buildup begins and then opened when the pressure at the first hydraulic control valve drops to a first preset value; the second hydraulic control valve is located at the position of a wheel cylinder on one side of the first axle and communicates with the first hydraulic control valve, and the second hydraulic control valve is arranged to be closed when the pressure at the position of the first hydraulic control valve is reduced to a first preset value; the third hydraulic control valve is located at the position of a wheel cylinder on the other side of the first axle and communicates with the first hydraulic control valve, and the third hydraulic control valve is arranged to be closed when the pressure at the position of the first hydraulic control valve is reduced to a first preset value.

Description

Technical Field

[0001] The present application belongs to the field of automobile control, and in particular, relates to a vehicle body electronic stability system and a vehicle equipped with the vehicle body electronic stability system. Background Art

[0002] The information provided in this section is for the purpose of generally presenting the background of the present disclosure. To the extent described in this section, the work of the presently named inventors and aspects of the description that may not constitute prior art at the time of filing are neither explicitly nor implicitly admitted to be prior art to the present disclosure.

[0003] With the rapid development of new energy vehicles and intelligent driving, electronic hydraulic brake systems are being used more and more in vehicles. Currently, the large-scale electronic hydraulic brake systems used in automobiles include ibooster, EHB, etc. These electronic hydraulic brake systems are used in conjunction with the conventional electronic stability program (ESP) to provide assistance for vehicle braking.

[0004] Application Contents

[0005] According to the present application, a vehicle body electronic stability system is provided, the vehicle body electronic stability system comprising: a brake master cylinder connected to a brake pedal; and

[0006] The first pressure building circuit is configured to draw brake fluid from the brake master cylinder to build pressure during active pressure building and pump the brake fluid to the wheel cylinders on both sides of the first axle to achieve braking. The first pressure building circuit is provided with:

[0007] a first hydraulically controlled valve located at the first axle and in communication with the brake master cylinder, wherein the first hydraulically controlled valve is configured to close when active pressure buildup begins and then open when the pressure at the first hydraulically controlled valve drops to a first preset value;

[0008] a second hydraulically controlled valve located at a wheel cylinder on one side of the first axle and in communication with the first hydraulically controlled valve, wherein the second hydraulically controlled valve is configured to close when the pressure at the first hydraulically controlled valve drops to the first preset value; and

[0009] A third hydraulically controlled valve is located at the wheel cylinder on the other side of the first axle and is in communication with the first hydraulically controlled valve, wherein the third hydraulically controlled valve is configured to close when the pressure at the first hydraulically controlled valve drops to the first preset value.

[0010] Optionally, in the vehicle body electronic stability system as described above, the first hydraulically controlled valve, the second hydraulically controlled valve and the third hydraulically controlled valve all have a spherical sealing structure.

[0011] Optionally, in the vehicle body electronic stability system as described above, the vehicle body electronic stability system further includes a pressure sensor for detecting the pressure at the first hydraulic control valve.

[0012] Optionally, in the vehicle body electronic stability system as described above, the vehicle body electronic stability system further includes an electronic control unit, which communicates with the first hydraulic control valve, the second hydraulic control valve, the third hydraulic control valve and the pressure sensor or any combination thereof.

[0013] Optionally, in the vehicle body electronic stability system as described above, the vehicle body electronic stability system also includes a motor for building pressure, and the motor is configured to build pressure again after the pressure at the first hydraulic control valve drops to a first preset value and before the second hydraulic control valve and the third hydraulic control valve are closed.

[0014] Optionally, in the vehicle body electronic stability system as described above, the first pressure building circuit is also provided with a pump device for extracting brake fluid, the pump device is located downstream of the first hydraulic control valve and upstream of the second hydraulic control valve and the third hydraulic control valve, and the pump device is driven by the motor.

[0015] Optionally, in the vehicle body electronic stability system as described above, the vehicle body electronic stability system further includes:

[0016] The second pressure building circuit is configured to draw brake fluid from the brake master cylinder to build pressure and input the brake fluid into the wheel cylinders on both sides of the second axle to achieve braking when actively building pressure. The second pressure building circuit is provided with:

[0017] a fourth hydraulically controlled valve located at the second axle and in communication with the brake master cylinder, wherein the fourth hydraulically controlled valve is configured to close when active pressure buildup begins and then open when the pressure at the fourth hydraulically controlled valve drops to a second preset value;

[0018] a fifth hydraulically controlled valve located at a wheel cylinder on one side of the second axle and in communication with the fourth hydraulically controlled valve, wherein the fifth hydraulically controlled valve is configured to close when the pressure at the fourth hydraulically controlled valve drops to the second preset value; and

[0019] a sixth hydraulically controlled valve located at the wheel cylinder on the other side of the second axle and connected to the fourth hydraulically controlled valve, wherein the sixth hydraulically controlled valve is configured to close when the pressure at the fourth hydraulically controlled valve drops to the second preset value.

[0020] Optionally, in the vehicle body electronic stability system as described above, the first hydraulically controlled valve, the second hydraulically controlled valve, the third hydraulically controlled valve, the fourth hydraulically controlled valve, the fifth hydraulically controlled valve and the sixth hydraulically controlled valve are bidirectional conducting switch valves.

[0021] Optionally, in the vehicle body electronic stability system as described above, the first hydraulic control valve and the fourth hydraulic control valve have the same shape and size, and / or

[0022] The second hydraulically controlled valve, the third hydraulically controlled valve, the fifth hydraulically controlled valve and the sixth hydraulically controlled valve are identical in shape and size.

[0023] In addition, according to the present application, a vehicle is also provided, wherein the vehicle is provided with the above-mentioned vehicle body electronic stability system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The disclosure of the present application will become more easily understood with reference to the accompanying drawings. It is easy for those skilled in the art to understand that these drawings are only for illustrative purposes and are not intended to limit the scope of protection of the present application. In addition, similar numbers in the drawings are used to represent similar components, among which:

[0025] Figure 1 The structural schematic diagram of the vehicle body electronic stability system disclosed in the present application is exemplarily shown. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below in conjunction with the accompanying drawings. First of all, it should be noted that the directional terms such as up, down, left, right, front, back, inside, outside, top, bottom, etc. mentioned or may be mentioned in this specification are defined relative to the structures shown in the drawings. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms.

[0027] Figure 1 FIG. 2 shows a schematic structural diagram of the vehicle body electronic stability system disclosed in the present application. Figure 1As can be clearly seen in the figure, the vehicle body electronic stability system 100 includes a brake master cylinder 110 and a first pressure-building circuit 120, etc. The brake master cylinder 110 is usually connected to a brake pedal 160 by means of a piston rod. The first pressure-building circuit 120 is configured to extract brake fluid from the brake master cylinder 110 to build pressure during active pressure building and pump the brake fluid to the wheel cylinders on both sides of the first axle (not shown) to achieve braking. The first pressure-building circuit 120 is provided with a first hydraulic control valve 121, a second hydraulic control valve 122, and a third hydraulic control valve 123, etc. The first hydraulic control valve 121 is located at the first axle and communicated with the brake master cylinder 110, wherein the first hydraulic control valve 121 is configured to be closed at the beginning of active pressure building, thereby playing a role in maintaining pressure at the first axle, and then the first hydraulic control valve 121 is opened after the pressure at the first hydraulic control valve 121 drops to a first preset value. The second hydraulic control valve 122 is located at the wheel cylinder on one side of the first axle and is communicated with the first hydraulic control valve 121, wherein the second hydraulic control valve 122 is configured to be closed when the pressure at the first hydraulic control valve 121 drops to the first preset value, thereby playing a role of maintaining pressure at the wheel end on one side of the first axle. The third hydraulic control valve 123 is located at the wheel cylinder on the other side of the first axle and is communicated with the first hydraulic control valve 121, wherein the third hydraulic control valve 123 is configured to be closed when the pressure at the first hydraulic control valve 121 drops to the first preset value, thereby playing a role of maintaining pressure at the wheel end on the other side of the first axle. When the vehicle performs the automatic parking (AVH) function, the vehicle body electronic stability system 100 can effectively delay the leakage of brake fluid through the alternating closure of the first hydraulic control valve 121, the second hydraulic control valve 122 and the third hydraulic control valve 123, thereby playing an effective role of maintaining pressure on the wheel cylinders on both sides of the first axle.

[0028] It should be noted that the first hydraulically controlled valve 121, the second hydraulically controlled valve 122 and the third hydraulically controlled valve 123 all have a spherical sealing structure. The spherical sealing structure may cause a certain amount of leakage in the hydraulically controlled valve device, but those skilled in the art are aware that the hydraulically controlled valve with a spherical sealing structure is inexpensive and is very helpful in reducing manufacturing costs.

[0029] Continue to refer Figure 1 The vehicle body electronic stability system further includes a pressure sensor 130 for detecting the pressure at the first hydraulic control valve 121. For example, when the pressure sensor 130 detects a decrease in the pressure at the first hydraulic control valve 121, it indicates that there is a leakage in the first hydraulic control valve 121. In addition, the vehicle body electronic stability system 100 may further include an electronic control unit, which communicates with the first hydraulic control valve 121, the second hydraulic control valve 122, the third hydraulic control valve 123 and the pressure sensor 130 or any combination thereof.

[0030] In combination with the above embodiments, in other optional embodiments, the vehicle body electronic stability system 100 further includes a motor 140 for building pressure, and the motor 140 is configured to build pressure again after the pressure at the first hydraulic control valve 121 drops to a first preset value and before the second hydraulic control valve 122 and the third hydraulic control valve 123 are closed, thereby delaying leakage. Furthermore, the first pressure building circuit 120 is also provided with a pump device 124 for extracting brake fluid, and the pump device 124 is located downstream of the first hydraulic control valve 121 and upstream of the second hydraulic control valve 122 and the third hydraulic control valve 123, and the pump device 124 is driven by the motor 140.

[0031] Continue to refer Figure 1 The vehicle body electronic stability system 100 further includes a second pressure-building circuit 150, which is configured to draw brake fluid from the brake master cylinder 110 to build pressure during active pressure building and input the brake fluid into the wheel cylinders on both sides of the second axle (not shown) to achieve braking. The second pressure-building circuit 150 is provided with a fourth hydraulic control valve 151, a fifth hydraulic control valve 152, and a sixth hydraulic control valve 153. The fourth hydraulic control valve 151 is located at the second axle and communicated with the brake master cylinder 110, wherein the fourth hydraulic control valve 151 is configured to be closed at the beginning of active pressure building, thereby playing a role in maintaining pressure at the second axle, and then the fourth hydraulic control valve 151 is opened after the pressure at the fourth hydraulic control valve 151 drops to a second preset value. The fifth hydraulic control valve 152 is located at the wheel cylinder on one side of the second axle and is communicated with the fourth hydraulic control valve 151, wherein the fifth hydraulic control valve 152 is configured to be closed when the pressure at the fourth hydraulic control valve 151 drops to the second preset value, thereby playing a role of maintaining pressure at the wheel end on one side of the second axle. The sixth hydraulic control valve 153 is located at the wheel cylinder on the other side of the second axle and is communicated with the fourth hydraulic control valve 151, wherein the sixth hydraulic control valve 153 is configured to be closed when the pressure at the fourth hydraulic control valve 151 drops to the second preset value, thereby playing a role of maintaining pressure at the wheel end on the other side of the second axle.

[0032] In the embodiment of the vehicle body electronic stability system 100, the first hydraulic control valve 121, the second hydraulic control valve 122, the third hydraulic control valve 123, the fourth hydraulic control valve 151, the fifth hydraulic control valve 152 and the sixth hydraulic control valve 153 are two-way conduction switch valves. For ease of manufacturing, the first hydraulic control valve 121 and the fourth hydraulic control valve 151 have the same shape and size; the second hydraulic control valve 122, the third hydraulic control valve 123, the fifth hydraulic control valve 152 and the sixth hydraulic control valve 153 have the same shape and size.

[0033] In addition, the present application also proposes a vehicle, the vehicle is provided with the above-mentioned vehicle body electronic stability system 100, the vehicle has a first axle and a second axle, and wheels are installed on both sides of the first axle and the second axle. The vehicle can be a private car, a taxi, a bus, a minibus or a coach, etc.

[0034] Several specific implementations are listed above to explain in detail the vehicle body electronic stability system of the present application and the vehicle equipped with the vehicle body electronic stability system. These examples are only used to illustrate the principles and implementation methods of the present application, and are not intended to limit the present application. Without departing from the spirit and scope of the present application, ordinary technicians in this field can also make various modifications and improvements. Therefore, all equivalent technical solutions should belong to the scope of the present application and be defined by the claims of the present application.

Claims

1. A vehicle body electronic stability system, comprising: A brake master cylinder (110) connected to a brake pedal (160); as well as The first pressure building circuit (120) is configured to draw brake fluid from the brake master cylinder (110) to build pressure during active pressure building and pump the brake fluid to wheel cylinders on both sides of the first axle to achieve braking, and is characterized in that the first pressure building circuit (120) is provided with: a first hydraulically controlled valve (121), which is located at the first axle and is in communication with the brake master cylinder (110), wherein the first hydraulically controlled valve (121) is configured to close when active pressure buildup begins and then open when the pressure at the first hydraulically controlled valve (121) drops to a first preset value; a second hydraulically controlled valve (122), which is located at a wheel cylinder on one side of the first axle and is in communication with the first hydraulically controlled valve (121), wherein the second hydraulically controlled valve (122) is configured to close when the pressure at the first hydraulically controlled valve (121) drops to the first preset value; and A third hydraulically controlled valve (123) is located at the wheel cylinder on the other side of the first axle and is connected to the first hydraulically controlled valve (121), wherein the third hydraulically controlled valve (123) is configured to close when the pressure at the first hydraulically controlled valve (121) drops to the first preset value.

2. The vehicle body electronic stability system according to claim 1, characterized in that: The first hydraulically controlled valve (121), the second hydraulically controlled valve (122) and the third hydraulically controlled valve (123) all have a spherical sealing structure.

3. The vehicle body electronic stability system according to claim 2, characterized in that: The vehicle body electronic stability system (100) further comprises a pressure sensor (130) for detecting the pressure at the first hydraulic control valve (121).

4. The vehicle body electronic stability system according to claim 3, characterized in that: The vehicle body electronic stability system (100) further comprises an electronic control unit, which communicates with the first hydraulic control valve (121), the second hydraulic control valve (122), the third hydraulic control valve (123) and the pressure sensor (130) or any combination thereof.

5. The vehicle body electronic stability system according to any one of claims 1 to 3, characterized in that: The vehicle body electronic stability system (100) further comprises a motor (140) for building up pressure, wherein the motor (140) is configured to build up pressure again after the pressure at the first hydraulic control valve (121) drops to a first preset value and before the second hydraulic control valve (122) and the third hydraulic control valve (123) are closed.

6. The vehicle body electronic stability system according to claim 5, characterized in that: The first pressure building circuit (120) is also provided with a pump device (124) for extracting brake fluid. The pump device (124) is located downstream of the first hydraulic control valve (121) and upstream of the second hydraulic control valve (122) and the third hydraulic control valve (123), and the pump device (124) is driven by the motor (140).

7. The vehicle body electronic stability system according to any one of claims 1 to 3, characterized in that: The vehicle body electronic stability system (100) further includes: The second pressure building circuit (150) is configured to draw brake fluid from the brake master cylinder (110) to build pressure during active pressure building and input the brake fluid into wheel cylinders on both sides of the second axle to achieve braking. The second pressure building circuit (150) is provided with: a fourth hydraulically controlled valve (151), which is located at the second axle and is in communication with the brake master cylinder (110), wherein the fourth hydraulically controlled valve (151) is configured to close when active pressure buildup begins and then open when the pressure at the fourth hydraulically controlled valve (151) drops to a second preset value; a fifth hydraulically controlled valve (152), which is located at a wheel cylinder on one side of the second axle and is in communication with the fourth hydraulically controlled valve (151), wherein the fifth hydraulically controlled valve (152) is configured to close when the pressure at the fourth hydraulically controlled valve (151) drops to the second preset value; and A sixth hydraulically controlled valve (153) is located at the wheel cylinder on the other side of the second axle and is connected to the fourth hydraulically controlled valve (151), wherein the sixth hydraulically controlled valve (153) is configured to close when the pressure at the fourth hydraulically controlled valve (151) drops to the second preset value.

8. The vehicle body electronic stability system according to claim 7, characterized in that: The first hydraulically controlled valve (121), the second hydraulically controlled valve (122), the third hydraulically controlled valve (123), the fourth hydraulically controlled valve (151), the fifth hydraulically controlled valve (152) and the sixth hydraulically controlled valve (153) are two-way conducting on-off valves.

9. The vehicle body electronic stability system according to claim 7, characterized in that: The first hydraulically controlled valve (121) and the fourth hydraulically controlled valve (151) have the same shape and size, and / or The second hydraulically controlled valve (122), the third hydraulically controlled valve (123), the fifth hydraulically controlled valve (152) and the sixth hydraulically controlled valve (153) are of the same shape and size.

10. A vehicle, characterized in that: The vehicle is provided with a vehicle body electronic stability system (100) according to any one of claims 1 to 9.

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