Suspension system, chassis assembly and vehicle

Abstract

The utility model provides a suspension system, a chassis assembly and a vehicle. The suspension system comprises a first valve, an air compression device, an air storage device and a suspension device. The first valve is provided with a first interface, a second interface and a third interface, the third interface is communicated with the air storage device, the second interface is communicated with an air inlet of the air compression device, and an air outlet of the air compression device is communicated with the suspension device and the first interface; and the third interface is suitable for being communicated with at most one of the first interface and the second interface, so that the suspension system is in different working states. According to the air storage device, the two functions of pressurization and pressure relief of the air storage device and recompression of air in the air storage device through the air compression device are achieved through one valve, the number of valves is reduced, the product size and the production cost are reduced, and the space utilization rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to vehicle chassis technical field, concretely relates to a kind of suspension system, chassis assembly and vehicle. BACKGROUND

[0002] Air suspension system gives consideration to the comfort of car and the passability of off-road vehicle, can be according to the actual situation of road condition, judges the height of car, controls air compressor and air release valve, makes air spring elongation or compression, to increase the stability of car body under high speed and passability.

[0003] In air suspension system, to reduce power consumption, improve the response speed of suspension, usually need to set up gas holder, store certain amount of high pressure gas, for suspension pressurization use.Gas holder and the suction of air compressor are provided with air passage.In conventional technology, at least two valves are usually needed to realize the two functions of pressurization and pressure relief of gas holder and the re-compression of high pressure gas in gas holder by air compressor.

[0004] In conventional technology, to realize the above two functions, the number of required valves is more, which increases the volume and production cost of product, and makes the control logic of system more complex, and the process difficulty of product design increases. UTILITARY MODEL CONTENT

[0005] The utility model embodiment aims at providing a kind of suspension system, chassis assembly and vehicle, can solve the problem of more valves required and larger production cost when realizing the functions of pressurization and pressure relief of gas holder and the re-compression of high pressure gas in gas holder by air compressor in conventional technology.

[0006] To solve the above technical problem, the utility model is realized as follows:

[0007] Firstly, the utility model embodiment provides a kind of suspension system, including first valve, air compression device, air storage device and suspension device;

[0008] The first valve is provided with first interface, second interface and third interface, the third interface is communicated with the air storage device, the second interface is communicated with the air inlet of air compression device, and the

[0009] The air outlet of air compression device is communicated with the suspension device and the first interface;

[0010] The third interface is adapted to be connected with at most one of the first interface and the second interface, so that the suspension system is in different working state.

[0011] Optionally, the suspension system further includes pressure relief valve;

[0012] The suspension device and the first interface are in communication with the pressure relief valve.

[0013] Optionally, the suspension system further comprises a second valve and a third valve;

[0014] The second valve is arranged on an air path between the suspension device and the pressure relief valve, and the second valve is in communication with the first interface;

[0015] The third valve is arranged on an air path between the suspension device and an air inlet of the air compression device.

[0016] Optionally, the suspension system further comprises a fourth valve;

[0017] The fourth valve is arranged on an air path where the suspension device is located, and the fourth valve is in communication with the second valve and the third valve.

[0018] Optionally, in the case where the third interface is disconnected from the first interface and the second interface:

[0019] When the second valve and the fourth valve are open, and the third valve and the pressure relief valve are closed, the air compression device pressurizes the suspension device;

[0020] When the second valve, the fourth valve and the pressure relief valve are open, and the third valve is closed, the suspension device is depressurized through the pressure relief valve.

[0021] Optionally, in the case where the third interface is connected to the first interface:

[0022] When the fourth valve and the pressure relief valve are closed, the air compression device pressurizes the air storage device;

[0023] When the pressure relief valve is open, and the fourth valve is closed, the air storage device is depressurized through the pressure relief valve;

[0024] When the third valve and the fourth valve are open, and the pressure relief valve and the second valve are closed, the suspension device pressurizes the air storage device through the air compression device;

[0025] When the second valve and the fourth valve are open, and the pressure relief valve and the third valve are closed, the air storage device pressurizes the suspension device, or the suspension device pressurizes the air storage device.

[0026] Optionally, in the case where the third interface is connected to the second interface:

[0027] When the second valve and the fourth valve are opened, and the pressure relief valve and the third valve are closed, the air storage device pressurizes the suspension device through the air compressor device.

[0028] Optionally, the suspension system further comprises an air filtering device.

[0029] The air filtering device is in communication with the air inlet of the air compressor device.

[0030] Optionally, the suspension system further comprises an air drying device.

[0031] The first interface and the suspension device are in communication with the air drying device at the same time, and the pressure relief valve and the air outlet of the air compressor device are in communication with the air drying device at the same time.

[0032] In the second aspect, the utility model embodiment further provides a chassis assembly, comprising the suspension system of any one of the above.

[0033] In the third aspect, the utility model embodiment further provides a vehicle, comprising the suspension system or the chassis assembly of any one of the above.

[0034] In the suspension system provided by the utility model embodiment, the first valve is a three-way valve with three interfaces, and the air storage device is used for storing high-pressure gas for use by the suspension device. The third interface of the first valve is in communication with the air storage device for air inlet and air outlet of the air storage device. The second interface is in communication with the air inlet of the air compressor device. The first interface is in communication with the air outlet of the air compressor device, and the air outlet of the air compressor device is also in communication with the suspension device. When the third interface is disconnected from the first interface and the second interface, the air storage device can be isolated from the entire suspension system. When the third interface is connected to the first interface, the air storage device can be pressurized or depressurized. When the third interface is connected to the second interface, the gas in the air storage device can be re-compressed by the air compressor device and then delivered to the suspension device. Therefore, the pressurization and depressurization of the air storage device and the re-compression of the gas in the air storage device by the air compressor device are realized by one valve. On the basis of realizing the function of the suspension system, the number of valves is reduced, the product size and production cost are reduced, the control logic and product design process difficulty of the system are reduced, and the space utilization is improved.

[0035] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, which can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the utility model more obvious and easy to understand, the specific implementation manner of the utility model is as follows. BRIEF DESCRIPTION OF DRAWINGS

[0036] The above and / or additional aspects and advantages of the present utility model will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the references to the following drawings of which:

[0037] Figure 1 is a suspension system schematic diagram provided by the utility model embodiment;

[0038] Figure 2 is a first working state gas circuit principle diagram of the suspension system of the utility model embodiment;

[0039] Figure 3 is a second working state gas circuit principle diagram of the suspension system of the utility model embodiment;

[0040] Figure 4 is a third working state gas circuit principle diagram of the suspension system of the utility model embodiment;

[0041] Figure 5 is a fourth working state gas circuit principle diagram of the suspension system of the utility model embodiment;

[0042] Figure 6 is a fifth working state gas circuit principle diagram of the suspension system of the utility model embodiment;

[0043] Figure 7 is a sixth working state gas circuit principle diagram of the suspension system of the utility model embodiment;

[0044] Figure 8 is a seventh working state gas circuit principle diagram of the suspension system of the utility model embodiment;

[0045] Figure 9 is an eighth working state gas circuit principle diagram of the suspension system of the utility model embodiment;

[0046] Figure 10 is a second suspension system schematic diagram provided by the utility model embodiment;

[0047] Figure 11 is a third suspension system schematic diagram provided by the utility model embodiment;

[0048] Figure 12 is a fourth suspension system schematic diagram provided by the utility model embodiment;

[0049] Figure 13 is a fifth suspension system schematic diagram provided by the utility model embodiment;

[0050] Figure 14 is a sixth suspension system schematic diagram provided by the utility model embodiment.

[0051] BRIEF DESCRIPTION OF DRAWINGS:

[0052] 1 - first valve, 11 - first interface, 12 - second interface, 13 - third interface, 2 - air compression device, 3 - air storage device, 4 - suspension device, 41 - fourth valve, 42 - pressure sensor, 5 - pressure relief valve, 6 - second valve, 7 - third valve, 8 - air filtration device, 9 - air drying device. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0054] The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second" and the like are generally of a kind, and are not limited to the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0055] The suspension system, chassis assembly and vehicle provided by the embodiments of the present application will be described in detail below with reference to the drawings and specific embodiments and their application scenarios.

[0056] With reference to Figure 1 The embodiments of the present application provide a suspension system, which comprises a first valve 1, an air compression device 2, an air storage device 3 and a suspension device 4. The first valve 1 is provided with a first interface 11, a second interface 12 and a third interface 13. The third interface 13 is in communication with the air storage device 3. The second interface 12 is in communication with the air inlet of the air compression device 2. The air outlet of the air compression device 2 is in communication with the suspension device 4 and the first interface 11. The third interface 13 is adapted to be connected with at most one of the first interface 11 and the second interface 12, so that the suspension system is in different working states.

[0057] Specifically, as Figure 1As shown, the suspension system provided by the embodiment of the utility model, including first valve 1, air compression device 2, air storage device 3, suspension device 4 and the air path connected between each device. First valve 1 is three-way valve, with three interfaces: first interface 11, second interface 12 and third interface 13, the form that first valve 1 can adopt includes but is not limited to electromagnetic three-way valve or electrically suspended rotary three-way valve. For example Figure 11 And Figure 13 The first valve 1 in the electromagnetic three-way valve is used, and the movement of the valve core is controlled by the electromagnetic force of the coil to realize different connection states of the valve. For example Figure 12 And Figure 14 The first valve 1 in the electromagnetic three-way valve is used, and the movement of the valve core is controlled by the electromagnetic force of the coil to realize different connection states of the valve. For example The air storage device 3 is a gas storage tank or a gas cylinder, which is used to store high-pressure gas for the suspension device 4. The suspension device 4 of the embodiment includes an air spring, which can be provided with multiple parallel air springs. When the suspension device 4 is filled with air, the air spring is elongated to lift the chassis height, and when the suspension device 4 is deflated, the air spring is compressed to lower the chassis height. The third interface 13 of the first valve 1 is in communication with the air storage device 3 for air intake and air outlet of the air storage device 3. The second interface 12 is in communication with the air inlet of the air compression device 2 for delivering high-pressure gas in the air storage device 3 to the air compression device 2 for re-compression. The first interface 11 is in communication with the air outlet of the air compression device 2, and the air outlet of the air compression device 2 and the first interface 11 are both in communication with the suspension device 4. The third interface 13 can be disconnected from the first interface 11 and the second interface 12, or the third interface 13 can be in communication with the first interface 11, or the third interface 13 can be in communication with the second interface 12.

[0058] In some embodiments, when the third interface 13 is disconnected from the first interface 11 and the second interface 12, as shown in Figure 4 And Figure 5 The air storage device 3 can be isolated from the entire suspension system, and at this time the suspension device 4 can be directly inflated or deflated. When the third interface 13 is connected to the first interface 11, the air storage device 3 can be pressurized or depressurized: specifically, as shown in Figure 2 The air compression device inhales atmospheric air to pressurize the air storage device 3; as shown in Figure 3 The air storage device 3 is depressurized through the pressure relief valve 5 to discharge gas into the atmosphere; as shown in Figure 7 The gas output by the suspension device 4 is re-compressed by the air compression device to pressurize the air storage device 3; as shown in Figure 8 The air storage device 3 directly pressurizes the suspension device 4; as shown in Figure 9As shown, the suspension device 4 is directly pressurized by the air storage device 3. When the third interface 13 is connected with the second interface 12, as shown in Figure 6 As shown, the gas in the air storage device 3 is delivered to the suspension device 4 after being re-compressed by the air compression device 2, and the suspension device 4 is pressurized.

[0059] Therefore, the embodiment of the utility model realizes the pressurization and pressure relief of the air storage device, and the two functions of re-compressing the gas in the air storage device by the air compression device, reduces the number of valves, reduces the product volume and production cost, reduces the control logic and product design process difficulty of the system, and improves the space utilization.

[0060] Optionally, referring to Figure 1 , the suspension system further comprises a pressure relief valve 5; the suspension device 4 and the first interface 11 are communicated with the pressure relief valve 5.

[0061] Specifically, as shown in Figure 1 , the pressure relief valve 5 of the embodiment adopts a two-position two-way electromagnetic valve, and the pressure relief valve 5 is communicated with the outside atmosphere. The pressure relief valve 5 is communicated with the suspension device 4 and the first interface 11, and is used to realize the exhaust pressure relief of the air storage device 3 or the suspension device 4.

[0062] Optionally, referring to Figure 1 , the suspension system further comprises a second valve 6 and a third valve 7; the second valve 6 is arranged on the gas path between the suspension device 4 and the pressure relief valve 5, and the second valve 6 is communicated with the first interface 11; the third valve 7 is arranged on the gas path between the suspension device 4 and the air inlet of the air compression device 2.

[0063] Specifically, as shown in Figure 1 , the second valve 6 and the third valve 7 are arranged on the main gas path of the suspension device 4, the second valve 6 is arranged on the gas path between the suspension device 4 and the pressure relief valve 5, that is, the air spring gas path total switch valve, and the pressure relief or pressurization of the suspension device 4 is realized by the on-off of the second valve 6. The third valve 7 is arranged on the gas path between the suspension device 4 and the air inlet of the air compression device 2, that is, the air spring gas re-compression switch valve, and the gas in the air storage device 3 is delivered to the air storage device 3 after being re-compressed by the air compression device 2, and the suspension device 4 is pressurized.

[0064] As shown in Figure 1 , Figure 11 and Figure 12 , the suspension device comprising the second valve 6 and the third valve 7 in the above embodiment is a closed suspension system. As shown in Figure 10 , Figure 13 and Figure 14The suspension device shown is an open suspension system, in which the second valve 6 and the third valve 7 are not installed. When the gas pressure of the suspension device 4 is lower than the gas pressure of the air storage device 3, if the suspension device 4 needs to release pressure, it can only release pressure to the atmosphere through the pressure relief valve 5, and cannot release pressure to the air storage device 3.

[0065] Optionally, refer to Figure 1 The suspension system further includes a fourth valve 41; the fourth valve 41 is disposed on the air line where the suspension device 4 is located, and the fourth valve 41 is connected to the second valve 6 and the third valve 7.

[0066] Specifically, the fourth valve 41 is an air spring gas switch solenoid valve. Each air spring has a fourth valve 41 installed in its gas path to control the opening and closing of each air spring's gas path. For example... Figure 1 As shown, the fourth valve 41 is connected to the second valve 6 and the third valve 7. Figure 10 As shown, the fourth valve 41 is connected to the first interface 11 of the first valve 1 and the pressure relief valve 5. A pressure sensor 42 is installed at the fourth valve 41 to detect the air pressure value of the suspension device 4 and feed it back to the control terminal so as to issue corresponding adjustment commands.

[0067] Optionally, refer to Figure 4 and Figure 5 When the third interface 13 is disconnected from both the first interface 11 and the second interface 12: when the second valve 6 and the fourth valve 41 are open, and the third valve 7 and the pressure relief valve 5 are closed, the air compression device 2 pressurizes the suspension device 4; when the second valve 6, the fourth valve 41 and the pressure relief valve 5 are open, and the third valve 7 is closed, the suspension device 4 releases pressure through the pressure relief valve 5.

[0068] Specifically, in this embodiment, the third interface 13 is disconnected from both the first interface 11 and the second interface 12, thus isolating the air storage device 3 from the entire suspension system. The suspension system has the following two operating states:

[0069] like Figure 4 As shown, when the second valve 6 and the fourth valve 41 are open, and the third valve 7 and the pressure relief valve 5 are closed, the gas flow path is as follows: suspension system air inlet - air filter device 8 - air compressor device 2 - air dryer device 9 - second valve 6 - fourth valve 41 - suspension device 4. That is, the air compressor device 2 draws in gas from the atmosphere, compresses it, and directly pressurizes the suspension device 4 to increase the vehicle chassis height.

[0070] like Figure 5As shown, when the second valve 6, the fourth valve 41, and the pressure relief valve 5 are open, and the third valve 7 is closed, the gas flow path is as follows: suspension device 4 - fourth valve 41 - second valve 6 - air drying device 9 - pressure relief valve 5 - suspension system outlet, that is, the suspension device 4 directly releases pressure into the atmosphere to reduce the height of the vehicle chassis.

[0071] Optionally, refer to Figure 2 , Figure 3 , Figure 7 to Figure 9 When the third interface 13 is connected to the first interface 11; when the fourth valve 41 and the pressure relief valve 5 are closed, the air compressor 2 pressurizes the air storage device 3; when the pressure relief valve 5 is open and the fourth valve 41 is closed, the air storage device 3 releases pressure through the pressure relief valve 5; when the third valve 7 and the fourth valve 41 are open and the pressure relief valve 5 and the second valve 6 are closed, the suspension device 4 pressurizes the air storage device 3 through the air compressor 2; when the second valve 6 and the fourth valve 41 are open and the pressure relief valve 5 and the third valve 7 are closed, the air storage device 3 pressurizes the suspension device 4, or the suspension device 4 pressurizes the air storage device 3.

[0072] Specifically, in this embodiment, the third interface 13 is connected to the first interface 11, allowing for pressurization or depressurization of the air storage device 3. The suspension system has the following five operating states:

[0073] like Figure 2 As shown, when the fourth valve 41 and the pressure relief valve 5 are closed, the suspension device 4 is disconnected. The gas flow path is as follows: suspension system air inlet - air filter device 8 - air compressor device 2 - air dryer device 9 - first interface 11 - third interface 13 - air storage device 3. That is, the air compressor device 2 draws in gas from the atmosphere, compresses it, and directly delivers it to the air storage device 3 to pressurize it. The high-pressure gas stored in the air storage device 3 can be used for subsequent pressurization of the suspension device 4. Compared with the embodiment where atmospheric pressure is directly compressed by the air compressor device 2 and then delivered to the suspension device 4, the pressurization range is smaller and the response speed is faster.

[0074] like Figure 3 As shown, when the pressure relief valve 5 is open and the fourth valve 41 is closed, the suspension device 4 is disconnected. The gas flow path is as follows: air storage device 3 - third interface 13 - first interface 11 - air drying device 9 - pressure relief valve 5 - suspension system outlet, that is, the air storage device 3 directly releases pressure into the atmosphere, reducing the pressure of the device.

[0075] like Figure 7As shown, when the third valve 7 and the fourth valve 41 are open, and the pressure relief valve 5 and the second valve 6 are closed, the gas flow path is as follows: suspension device 4 - fourth valve 41 - third valve 7 - air compressor 2 - air dryer 9 - first interface 11 - third interface 13 - air storage device 3. That is, the gas output by the suspension device 4 is compressed again by the air compressor 2 and then discharged to the air storage device 3. While lowering the vehicle chassis height, the air storage device 3 can make full use of the gas discharged by the suspension device 4 when it needs to be replenished with a certain amount of gas.

[0076] like Figure 8 As shown, when the second valve 6 and the fourth valve 41 are open, and the pressure relief valve 5 and the third valve 7 are closed, when the air pressure in the air storage device 3 is greater than the air pressure in the suspension device 4, the gas flow path is as follows: air storage device 3 - third interface 13 - first interface 11 - second valve 6 - fourth valve 41 - suspension device 4, that is, the air storage device 3 outputs gas to the suspension device 4, realizing that the air storage device 3 directly pressurizes the suspension device 4.

[0077] like Figure 9 As shown, when the second valve 6 and the fourth valve 41 are open, and the pressure relief valve 5 and the third valve 7 are closed, when the air pressure in the air storage device 3 is less than the air pressure in the suspension device 4, the gas flow path is as follows: suspension device 4 - fourth valve 41 - second valve 6 - first interface 11 - third interface 13 - air storage device 3, that is, the suspension device 4 outputs gas to the air storage device 3, realizing that the suspension device 4 directly pressurizes the air storage device 3.

[0078] It should be noted that, as Figure 10 , Figure 13 and Figure 14 When the suspension device shown is an open suspension system, the suspension system cannot achieve the above-mentioned... Figure 9 The working state shown is one of the seven working states that can be achieved, which will not be elaborated here.

[0079] Optionally, refer to Figure 6 When the third interface 13 is connected to the second interface 12, and when the second valve 6 and the fourth valve 41 are open, and the pressure relief valve 5 and the third valve 7 are closed, the air storage device 3 pressurizes the suspension device 4 through the air compression device 2.

[0080] Specifically, as in the present embodiment, the third interface 13 is connected with the second interface 12, the second valve 6 and the fourth valve 41 are opened, the pressure relief valve 5 and the third valve 7 are closed, and the gas flow line is as follows: the air storage device 3-the third interface 13-the second interface 12-the air compression device 2-the air drying device 9-the second valve 6-the fourth valve 41-the suspension device 4. That is, the gas output by the air storage device 3 is compressed again by the air compression device 2 and then delivered to the suspension device 4 to pressurize the suspension device 4 and lift the vehicle body height. In this implementation, the power consumption of the air compression device 2 is lower, and the response speed of the suspension device 4 is faster.

[0081] Optionally, referring to Figure 1 , the suspension system further comprises an air filter device 8; the air filter device 8 is connected with the air inlet of the air compression device 2.

[0082] Specifically, as shown in Figure 1 , the air filter device 8 is arranged at the air inlet of the suspension system and connected with the air inlet of the air compression device 2, for filtering and purifying the gas to avoid pollution.

[0083] Optionally, referring to Figure 1 , the suspension system further comprises an air drying device 9; the first interface 11 and the suspension device 4 are connected with the air drying device 9 at the same time, and the air outlet of the pressure relief valve 5 and the air compression device 2 is connected with the air drying device 9 at the same time.

[0084] Specifically, as shown in Figure 1 , one side of the air drying device 9 is connected with the first interface 11 and the suspension device 4. The other side of the air drying device 9 is connected with the pressure relief valve 5 and the air outlet of the air compression device 2. The pressure relief valve 5 is an air outlet switch of the suspension system, and the pressure relief valve 5 and the air drying device 9 are connected through an air path. Since the suspension system compresses the gas, liquid droplets may be precipitated. In order to avoid the influence of the liquid droplets on the suspension adjustment performance of the vehicle, the air drying device 9 is arranged to remove the liquid droplets in the gas or the liquid droplets precipitated by the suspension system. The air drying device has a drying agent, and the drying agent can be regenerated through the pressure relief valve 5.

[0085] The embodiment of the utility model further provides a chassis assembly, comprising the suspension system of any one of the above-mentioned embodiments, reduce the volume of chassis assembly, improve the space utilization.

[0086] The embodiment of the utility model further provides a vehicle, comprising the suspension system or chassis assembly of any one of the above-mentioned embodiments, which is beneficial to realize the lightness of the vehicle.

[0087] It is to be understood that the terminology "including", "comprising", or any other variation thereof, is intended to cover a non-exclusive inclusion such that processes, methods, articles, or apparatuses that comprise a list of elements are not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element preceded by "comprises a" does not, without more limitations, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0088] The embodiments of the present application are described above in conjunction with the drawings, but the present application is not limited to the specific embodiments described above, and the specific embodiments described above are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope of protection of the claims, all of which belong to the protection of the present application.

Claims

1. A suspension system, characterized in that, It includes a first valve (1), an air compressor (2), an air storage device (3), and a suspension device (4); The first valve (1) is provided with a first interface (11), a second interface (12) and a third interface (13). The third interface (13) is connected to the air storage device (3), the second interface (12) is connected to the air inlet of the air compressor (2), and the air outlet of the air compressor (2) is connected to the suspension device (4) and the first interface (11). The third interface (13) is adapted to be connected to at most one of the first interface (11) and the second interface (12) to put the suspension system into different working states.

2. The suspension system according to claim 1, characterized in that, The suspension system also includes a pressure relief valve (5); The suspension device (4) and the first interface (11) are both connected to the pressure relief valve (5).

3. The suspension system according to claim 2, characterized in that, The suspension system also includes a second valve (6) and a third valve (7); The second valve (6) is located in the air passage between the suspension device (4) and the pressure relief valve (5), and the second valve (6) is connected to the first interface (11); The third valve (7) is located in the air path between the suspension device (4) and the air inlet of the air compressor device (2).

4. The suspension system according to claim 3, characterized in that, The suspension system also includes a fourth valve (41); The fourth valve (41) is located on the air line of the suspension device (4), and the fourth valve (41) is connected to the second valve (6) and the third valve (7).

5. The suspension system according to claim 4, characterized in that, When the third interface (13) is disconnected from both the first interface (11) and the second interface (12): When the second valve (6) and the fourth valve (41) are open, and the third valve (7) and the pressure relief valve (5) are closed, the air compressor (2) pressurizes the suspension device (4); When the second valve (6), the fourth valve (41) and the pressure relief valve (5) are open and the third valve (7) is closed, the suspension device (4) releases pressure through the pressure relief valve (5).

6. The suspension system according to claim 4, characterized in that, When the third interface (13) is connected to the first interface (11); When the fourth valve (41) and the pressure relief valve (5) are closed, the air compression device (2) pressurizes the air storage device (3); When the pressure relief valve (5) is open and the fourth valve (41) is closed, the air storage device (3) is depressurized through the pressure relief valve (5); When the third valve (7) and the fourth valve (41) are open, and the pressure relief valve (5) and the second valve (6) are closed, the suspension device (4) pressurizes the air storage device (3) through the air compression device (2); When the second valve (6) and the fourth valve (41) are open, and the pressure relief valve (5) and the third valve (7) are closed, the air storage device (3) pressurizes the suspension device (4), or the suspension device (4) pressurizes the air storage device (3).

7. The suspension system according to claim 4, characterized in that, When the third interface (13) is connected to the second interface (12); When the second valve (6) and the fourth valve (41) are open, and the pressure relief valve (5) and the third valve (7) are closed, the air storage device (3) pressurizes the suspension device (4) through the air compression device (2).

8. The suspension system according to any one of claims 1 to 7, characterized in that, The suspension system also includes an air filter (8); The air filter (8) is connected to the air inlet of the air compressor (2).

9. The suspension system according to claim 2, characterized in that, The suspension system also includes an air drying device (9); The first interface (11) and the suspension device (4) are simultaneously connected to the air drying device (9), and the pressure relief valve (5) and the air outlet of the air compressor (2) are simultaneously connected to the air drying device (9).

10. A chassis assembly, characterized in that, Includes the suspension system as described in any one of claims 1 to 9.

11. A vehicle, characterized in that, Includes the suspension system as described in any one of claims 1 to 9, or the chassis assembly as described in claim 10.

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