Air supply system of air suspension

Abstract

The embodiment of the utility model provides an air supply system of an air suspension. The air suspension air supply system comprises an air storage tank, a plurality of air springs, an air supply valve body set, an air inlet valve path, a first dryer and a second dryer. The air supply valve body group is provided with a first ventilation port, a second ventilation port and a plurality of third ventilation ports; the air inlet valve path is communicated with the first ventilation port; the first dryer is arranged on the air inlet valve path, the second dryer is connected between the second ventilation port and the air storage tank, and the multiple third ventilation ports communicate with the multiple air springs in a one-to-one correspondence mode. According to the air supply system of the air suspension, the air inlet is dried twice, so that the problem that the air inlet is not dried thoroughly due to insufficient drying agents and short contact time is solved. Therefore, according to the air supply system of the air suspension, the air path arrangement is simplified, and meanwhile the air inlet stability and reliability are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle technical field, concretely relates to an air suspension gas supply system. BACKGROUND

[0002] The air suspension is an important part of the automobile active suspension system, which is mainly composed of an air supply unit, an air spring, a damping device, a lateral stabilizer, a height valve, an air tank and a pipeline. According to the motion state and the road condition of the vehicle, the stiffness and the damping of the suspension can be adjusted in real time, so that the air suspension gas supply system is in the best damping state to improve the comfort of the vehicle in various road conditions.

[0003] The dryer design of the air suspension system has the problem of insufficient desiccant, which makes it difficult to effectively remove moisture and impurities in the system. When the humidity of the air is too high, the moisture in it may condense or evaporate when the temperature changes, which seriously affects the normal operation and long-term stability of the air suspension. To solve this problem, the related technology relies on a backflushing regeneration technology, which uses high-temperature compressed air to perform long-term exhaust backflushing to regenerate the desiccant. However, this method not only increases the complexity and maintenance cost of the system, but also may affect the stability and reliability of the system. SUMMARY

[0004] The utility model discloses at least one of the technical problems in the related art is solved to some extent. To this end, the embodiment of the utility model provides an air suspension gas supply system. The air suspension gas supply system not only simplifies the gas path setting, but also improves the stability and reliability of the air intake.

[0005] The air suspension gas supply system of the utility model embodiment comprises an air tank, a plurality of air springs, a gas valve body group, an air inlet valve path, a first dryer and a second dryer. The air tank is used for storing compressed gas, the air spring is used for inputting high-pressure gas to each wheel of the vehicle, and the gas valve body group has a first air port, a second air port and a plurality of third air ports. The air inlet valve path is in communication with the first air port, the first dryer is arranged on the air inlet valve path, the second dryer is connected between the second air port and the air tank in communication, and the plurality of third air ports are in one-to-one correspondence with the plurality of air springs.

[0006] The air suspension air supply system of the embodiment of the utility model, through the first dryer is established in the air inlet valve road, the second dryer is established between the air supply valve body group and the air tank, realizes the drying treatment before and after the gas compression, not only avoids the problem that the drying is not thorough because of the insufficient drying agent and short contact time. Therefore, the completeness of drying is improved. Further, because the moisture in the compressed gas is further liquefied, the second dryer arranged between the air supply valve body group and the air tank can dry the compressed gas. Therefore, the air suspension air supply system helps to further improve the completeness of gas drying, and the completeness of moisture removal improves the stability and reliability of the suspension air supply system. Moreover, the embodiment of the utility model does not need to add complex components to cooperate with airflow backflushing to promote the regeneration of the drying agent, and simplifies the structure of the system, and also reduces the maintenance cost of the equipment.

[0007] Therefore, the air suspension air supply system of the embodiment of the utility model not only simplifies the air path setting, but also improves the stability and reliability of the air inlet.

[0008] In some embodiments, the air supply system has an air suction mode, an air suspension lifting mode and an air suspension lowering mode which can be switched with each other.

[0009] When the air supply system is in the air suction mode, the valve of the air supply valve body group is switched to close the plurality of third air ports, and the first air port and the second air port are communicated, the first air port is communicated with the outside through the air inlet valve road, so that the outside air is sucked into the air tank to complete the system air supply.

[0010] When the air supply system is in the air suspension lifting mode, the valve of the air supply valve body group is switched to close the first air port, and the second air port and the plurality of third air ports are communicated, the gas in the air tank is compressed through the air path of the air supply valve body group to the plurality of air springs to lift the air springs.

[0011] When the air supply system is in the air suspension lowering mode, the valve of the air supply valve body group is switched to close the first air port, and the second air port and the plurality of third air ports are communicated, the gas in the plurality of air springs is extracted through the air path of the air supply valve body group to the air tank to lower the height of the air springs.

[0012] In some embodiments, the air supply system also has a load inflation mode, when the air supply system is in the load inflation mode, the second air port and the plurality of third air ports are closed, and the air inlet valve road is communicated with the outside through the air supply valve body group.

[0013] In some embodiments, the air supply valve block includes a plurality of air supply valves, a plurality of reversing valves, a first air vent sub-pipe, a second air vent sub-pipe, a second air vent pipe, a plurality of third air vent pipes, a one-way valve, an air exhaust valve, and an air pump assembly, the second dryer is arranged on the second air vent pipe, the reversing valve has the first air vent port, the air pump assembly and the one-way valve are arranged on the first air vent sub-pipe, the air exhaust valve is arranged on the second air vent sub-pipe, the air inlet valve is in communication with the first air vent port of the reversing valve through the first air vent sub-pipe, one end of the second air vent sub-pipe is connected to the first air vent sub-pipe between the first air vent port and the air pump assembly, the other end of the second air vent sub-pipe is in communication with an external load to inflate the external load, the air tank is in communication with the second air vent port of the reversing valve through the second air vent pipe, a plurality of air springs are in communication with the third air vent ports of the plurality of reversing valves through the plurality of third air vent pipes, and the air supply valve is arranged on the third air vent pipe.

[0014] When the air suspension air supply system is in a load inflation mode, the valves of the air supply valve block are switched to close the second air vent port and the plurality of third air vent ports, open the air exhaust valve, and make the first air vent sub-pipe in communication with the second air vent sub-pipe.

[0015] In some embodiments, the air suspension air supply system further includes a pressurization valve path, one end of the pressurization valve path is connected to a region between the air spring and the third air vent port, the other end of the pressurization valve path is connected to a region downstream of the air pump assembly of the first air vent sub-pipe, and the plurality of reversing valves include a first reversing valve, a second reversing valve, a third reversing valve, and a fourth reversing valve.

[0016] When the air supply system is in an air suspension lifting mode, the first reversing valve and the fourth reversing valve are closed, and the gas in the air tank is sequentially communicated through the second reversing valve, the pressurization valve path, the first air vent sub-pipe, the air pump assembly, the fourth reversing valve, the plurality of third air vent pipes, and the plurality of air springs to form a pressurized inflation path.

[0017] When the air supply system is in an air suspension lowering mode, the second reversing valve and the fourth reversing valve are closed, and the plurality of air springs, the plurality of third air vent pipes, the third reversing valve, the pressurization valve path, the air pump assembly, the first air vent sub-pipe, the first reversing valve, and the air tank are sequentially communicated to form a pressurized deflation path.

[0018] In some embodiments, the air suspension air supply system further includes a manual air exhaust plug arranged in a region of the first air vent sub-pipe between the fourth reversing valve and the air pump assembly.

[0019] In some embodiments, the air suspension air supply system further comprises a pressure limiting pipeline and a pressure limiting valve arranged on the pressure limiting pipeline, one end of the pressure limiting pipeline is connected to the first air supply pipeline at a region downstream of the air pump assembly, and the other end of the pressure limiting pipeline is connected to the first air supply pipeline at a region upstream of the one-way valve.

[0020] In some embodiments, the air pump assembly comprises an air pump and a motor, the motor is capable of driving the air pump to press external air into the dryer and flow to the air tank.

[0021] In some embodiments, the air suspension air supply system further comprises a temperature sensor, the temperature sensor is arranged on the third air supply pipeline.

[0022] In some embodiments, the air suspension air supply system further comprises an air filter, the air filter is arranged on the air inlet valve pipeline and at a region upstream of the first dryer. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a component connection diagram of the air suspension air supply system according to an embodiment of the present application.

[0024] Figure 2 is a gas flow direction diagram of the air suspension air supply system in an air suction mode according to an embodiment of the present application.

[0025] Figure 3 is a gas flow direction diagram of the air suspension air supply system in an air suspension lifting mode according to an embodiment of the present application.

[0026] Figure 4 is a gas flow direction diagram of the air suspension air supply system in an air suspension lowering mode according to an embodiment of the present application.

[0027] Figure 5 is a gas flow direction diagram of the air suspension air supply system in a load inflation mode according to an embodiment of the present application.

[0028] REFERENCE NUMERALS:

[0029] Air tank 1;

[0030] Air spring 2;

[0031] Air supply valve 31;

[0032] First reversing valve 321; second reversing valve 322; third reversing valve 323; fourth reversing valve 324;

[0033] First air supply sub-pipe 33; second air supply sub-pipe 34; second air supply pipe 35; third air supply pipe 36; one-way valve 37; exhaust valve 38; air pump assembly 39; air pump 391; motor 392;

[0034] Air inlet valve path 4;

[0035] First dryer 51; second dryer 52;

[0036] Temperature sensor 6;

[0037] Pressurizing valve path 7; manual exhaust cock 8;

[0038] Pressure limiting pipe 9; pressure limiting valve 91;

[0039] Air filter 10;

[0040] External load 11. DETAILED DESCRIPTION

[0041] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0042] The following description is made with reference to Figures 1-5 The air suspension air supply system of the embodiments of the present application is described.

[0043] The air suspension air supply system of the embodiments of the present application comprises an air tank 1, a plurality of air springs 2, an air supply valve body group, an air inlet valve path 4, a first dryer 51 and a second dryer 52. The air tank 1 is used to store compressed air, the air springs 2 are used to input high-pressure gas to each wheel of the vehicle, and the air supply valve body group has a first air supply port, a second air supply port and a plurality of third air supply ports; the air inlet valve path 4 is in communication with the first air supply port, the first dryer 51 is arranged on the air inlet valve path 4, the second dryer 52 is connected between the second air supply port and the air tank 1 in communication, and the plurality of third air supply ports are in one-to-one correspondence with the plurality of air springs 2.

[0044] The air suspension gas supply system of the embodiment of the utility model, through first dryer 51 is established in air inlet valve road 4, second dryer 52 is established between gas supply valve body group and air tank 1, realize the drying treatment before and after the compression of gas, not only avoid the problem of incomplete drying of inlet gas due to the shortage of drying agent and short contact time. Therefore, the completeness of drying is improved. Further, the moisture in the compressed gas is further liquefied, and the second dryer 52 arranged between the gas supply valve body group and the air tank 1 can dry the compressed gas. Therefore, it is helpful to further improve the completeness of gas drying. The completeness of moisture removal improves the stability and reliability of the suspension gas supply system. Moreover, the embodiment of the utility model does not need to add complex parts, and simplifies the system gas path structure, and reduces the maintenance cost of the equipment.

[0045] Therefore, the air suspension gas supply system of the embodiment of the utility model has the advantages of simplifying the gas path setting, improving the stability and reliability of the air suspension gas supply system.

[0046] As shown in Figures 2 to 4 , the air suspension gas supply system has an air suction mode, an air suspension lifting mode and an air suspension lowering mode that can be switched with each other.

[0047] As shown in Figure 2 , when the gas supply system is in the air suction mode, the valve of the gas supply valve body group is switched to close the plurality of third air ports, and the first air port and the second air port are communicated, the first air port is communicated with the outside through the air inlet valve road 4, so that the outside air is sucked into the air tank 1 to complete the system air supply.

[0048] As shown in Figure 3 , when the gas supply system is in the air suspension lifting mode, the valve of the gas supply valve body group is switched to close the first air port, and the second air port and the plurality of third air ports are communicated, the gas in the air tank 1 is compressed through the gas path of the gas supply valve body group to the plurality of air springs 2 to lift the air springs 2.

[0049] As shown in Figure 4 , when the gas supply system is in the air suspension lowering mode, the valve of the gas supply valve body group is switched to close the first air port, and the second air port and the plurality of third air ports are communicated, the gas in the plurality of air springs 2 is extracted through the gas path of the gas supply valve body group to the air tank 1 to lower the height of the air springs 2.

[0050] The air suspension gas supply system of the embodiment of the utility model can switch the valve of the gas supply valve body group to change the air suspension gas supply system between the air suction mode, the air suspension lifting mode and the air suspension lowering mode, and flexibly control the flow direction of the air. Therefore, the air suspension gas supply system has the advantages of simple structure and high control efficiency.

[0051] Moreover, asFigure 5 As shown in the figure, the air suspension air supply system has a load inflation mode, when the air supply system is in the load inflation mode, and the second air port and the plurality of third air ports are communicated, the intake valve path 4 is communicated with the outside through the air supply valve body group.

[0052] The air suspension air supply system of the embodiment of the utility model, through the load inflation mode set up, can realize the inflation of the external load 11, expand the air suspension air supply system function, increase the diversity of the air path.

[0053] Specifically, as Figures 1 to 5 As shown in the figure, the air supply valve body group includes a plurality of air supply valves 31, a plurality of reversing valves, a first air port branch path 33, a second air port branch path 34, a second air port path 35, a plurality of third air port paths 36, a one-way valve 37, an exhaust valve 38 and a gas pump assembly 39, the reversing valve has a first air port, the gas pump assembly 39 and the one-way valve 37 are arranged on the first air port branch path 33, the exhaust valve 38 is arranged on the second air port branch path 34, the intake valve path 4 is communicated with the first air port of the reversing valve through the first air port branch path 33, one end of the second air port branch path 34 is connected to the region between the first air port and the gas pump assembly 39 of the first air port branch path 33, the other end of the second air port branch path 34 can be communicated with the external load 11 to inflate the external load 11, the gas tank 1 is communicated with the second air port of the reversing valve through the second air port path 35, the plurality of air springs 2 are communicated with the third air ports of the plurality of reversing valves through the plurality of third air port paths 36, and the air supply valve 31 is arranged on the third air port path 36.

[0054] As shown in the figure, when the air supply system is in the load inflation mode, the valve of the air supply valve body group is switched to make the second air port and the plurality of third air ports closed, the exhaust valve 38 is opened, and the first air port branch path 33 is communicated with the second air port branch path 34. Figure 5

[0055] Further, as Figures 1 to 5 As shown in the figure, the air suspension air supply system of the embodiment of the utility model further includes a pressurizing valve path 7, one end of the pressurizing valve path 7 is connected to the region between the air spring 2 and the third air port, the other end of the pressurizing valve path 7 is connected with the downstream region of the first air port branch path 33 of the gas pump assembly 39, and the plurality of reversing valves include a first reversing valve 321, a second reversing valve 322, a third reversing valve 323 and a fourth reversing valve 324.

[0056] When the air supply system is in the air suspension lifting mode, the first reversing valve 321 and the fourth reversing valve 324 are closed, the gas in the gas tank 1 is sequentially communicated to form a pressurized inflation channel through the second reversing valve 322, the pressurizing valve path 7, the first air port branch path 33, the gas pump assembly 39, the fourth reversing valve 324, the plurality of third air port paths 36 and the plurality of air springs 2.​

[0057] When the air supply system is in the air suspension lowering mode, the second reversing valve 322 and the fourth reversing valve 324 are closed, the plurality of air springs 2, the plurality of third vent lines 36, the third reversing valve 323, the pressurizing valve line 7, the air pump assembly 39, the first vent sub-line 33, the first reversing valve 321 and the air tank 1 are sequentially communicated to form a pressurized air discharge channel.

[0058] The air suspension air supply system of the embodiment of the utility model, through setting up the pressurizing valve line 7, and connecting one end of the pressurizing valve line 7 in the area between the air spring 2 and the third vent port, the other end of the pressurizing valve line 7 is connected with the first vent sub-line 33 in the downstream area of the air pump assembly 39, that is to say, in the air suspension raising mode, the air discharged from the air tank 1 enters the wheel of the vehicle through the air spring 2 after being pressurized by the air pump assembly 39. Further improve the adjustment efficiency of the air suspension air supply system.

[0059] In the air suspension lowering mode, by controlling the opening of part of the reversing valve and the closing of another part of the valve, in the air suspension lowering mode, because the air pressure of the air tank 1 is relatively high, the air in the wheel of the vehicle is pressurized to the air tank 1 through the air pump assembly 39, and the air pump assembly 39 can provide driving force for the flow of gas. Therefore, the air suspension air supply system of the embodiment of the utility model is helpful to improve the adjustment range of the air suspension lowering mode.

[0060] As shown in Figures 1 to 5 The air suspension air supply system of the embodiment of the utility model further includes a manual air discharge plug 8, which is arranged in the area of the first vent sub-line between the fourth reversing valve 324 and the air pump assembly 39.

[0061] The air suspension air supply system of the embodiment of the utility model, through the manual air discharge plug 8 arranged in the area of the first vent sub-line between the fourth reversing valve 324 and the air pump assembly 39, can cause the problem of excessive air pressure in the pipeline when a valve fails, that is, the maximum pressure entering the air spring 2 can be limited, and damage to the air spring 2, the pipeline or other components caused by excessive pressure can be prevented. The manual air discharge plug 8 can manually discharge the overpressure gas in the pipeline. Therefore, the air suspension air supply system of the embodiment of the utility model ensures the safety and long-term reliability of the air suspension air supply system.

[0062] As shown in Figures 1 to 5 The air suspension air supply system of the embodiment of the utility model further includes a pressure limiting line 9 and a pressure limiting valve 91 arranged on the pressure limiting line 9, one end of the pressure limiting line 9 is connected to the first vent sub-line 33 in the downstream area of the air pump assembly 39, and the other end of the pressure limiting line 9 is connected to the first vent sub-line 33 in the upstream area of the one-way valve 37.

[0063] The air suspension air supply system of the embodiment of the utility model, through setting up the pressure limiting pipeline 9 and the pressure limiting valve 91 set up on the pressure limiting pipeline 9, and one end of the pressure limiting pipeline 9 is connected on the first air passage branch pipeline 33 in the area downstream of the air pump assembly 39, the other end of the pressure limiting pipeline 9 is connected on the first air passage branch pipeline 33 in the area upstream of the check valve 37, and then the air pump assembly 39 on the first air passage branch pipeline 33 can maintain a stable output pressure, is not affected by the input pressure fluctuation, so that the air suspension can work normally under the set pressure, guarantee the driving stability and the comfort of the vehicle.

[0064] Further, the air pump assembly 39 includes an air pump 391 and a motor 392, the motor 392 can drive the air pump 391 to press the external air into the dryer and flow to the air storage tank 1. The motor 392 drives the air pump 391 to suck the air from the air filter 10, and completes the air supplement of the air suspension air supply system by compressing the air into the air storage tank 1.

[0065] The air supply system of the air suspension further includes a temperature sensor 6, and the temperature sensor is arranged on the third air passage pipeline 36. The current gas temperature entering the air spring 2 is detected by the temperature sensor 6. And then the safety of the air supply system of the air suspension is improved.

[0066] The air supply system of the air suspension further includes an air filter 10, and the air filter 10 is arranged on the air inlet valve pipeline 4 and in the upstream area of the first dryer 51. The air filter 10 can filter the inlet air, and after impurity filtering and drying, the impurities adhering to the dryer are prevented to affect the drying efficiency of the gas.

[0067] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, structure and operation, therefore cannot be understood as limiting the utility model.

[0068] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0069] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0071] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" mean 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 application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0072] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. An air suspension air supply system, characterized in that, include: A gas storage tank, the gas storage tank being used to store compressed gas; Multiple air springs are used to supply high-pressure gas to each wheel of the vehicle. The air supply valve body assembly and the air intake valve path are provided. The air supply valve body assembly has a first air port, a second air port and multiple third air ports. The air intake valve path is connected to the first air port and the multiple third air ports are connected to multiple air springs in a corresponding manner. A first dryer and a second dryer are provided, wherein the first dryer is located on the air inlet valve and the second dryer is connected between the second air inlet port and the air storage tank.

2. The air suspension air supply system according to claim 1, characterized in that, The air supply system has interchangeable intake mode, suspension rise mode and suspension fall mode; When the gas supply system is in the intake mode, the valves of the gas supply valve body group are switched to close the multiple third ventilation ports, and the first ventilation port and the second ventilation port are connected. The first ventilation port is connected to the outside through the intake valve, so that outside air is drawn into the gas storage tank to complete the system gas replenishment. When the gas supply system is in the suspended lifting mode, the valve of the gas supply valve body group is switched to close the first air port, and the second air port and multiple third air ports are connected. The gas in the gas storage tank is compressed into multiple air springs through the gas passage of the gas supply valve body group to raise the air springs. When the air supply system is in the air suspension descent mode, the valve of the air supply valve body group is switched to close the first air port, and the second air port and multiple third air ports are connected. The gas in the multiple air springs is drawn into the air storage tank through the air passage of the air supply valve body group to lower the height of the air springs.

3. The air suspension air supply system according to claim 2, characterized in that, The air suspension air supply system also has a load inflation mode. When the air supply system is in the load inflation mode, the second air port and the plurality of the third air ports are closed, and the air intake valve is connected to the outside through the air supply valve body assembly.

4. The air suspension air supply system according to claim 3, characterized in that, The air supply valve assembly includes multiple air supply valves, multiple reversing valves, a first air supply branch line, a second air supply branch line, a second air supply line, multiple third air supply lines, a check valve, an exhaust valve, and an air pump assembly. The second dryer is located on the second air supply line. The reversing valve has a first air supply port. The air pump assembly and the check valve are both located on the first air supply branch line. The exhaust valve is located on the second air supply branch line. The air inlet valve is connected to the first air supply port of the reversing valve through the first air supply branch line. One end of the second air supply branch line is connected to the area of ​​the first air supply branch line located between the first air supply port and the air pump assembly. The other end of the second air supply branch line can be connected to an external load to inflate the external load. The air storage tank is connected to the second air supply port of the reversing valve through the second air supply line. Multiple air springs are connected to the third air supply ports of the multiple reversing valves through multiple third air supply lines. The air supply valve is located on the third air supply line. When the gas supply system is in the load charging mode, the valves of the gas supply valve body group are switched to close the second vent port and the plurality of third vent ports, the exhaust valve is opened, and the first vent branch line is connected to the second vent branch line.

5. The air suspension air supply system according to claim 4, characterized in that, It also includes a pressurization valve circuit, one end of which is connected to the area between the air spring and the third vent port, and the other end of which is connected to the first vent branch line located in the downstream area of ​​the air pump assembly. The plurality of reversing valves include a first reversing valve, a second reversing valve, a third reversing valve and a fourth reversing valve. When the gas supply system is in the suspended lifting mode, the first reversing valve and the fourth reversing valve are closed, and the gas in the gas storage tank is connected in sequence through the second reversing valve, the pressurizing valve, the first ventilation branch line, the air pump assembly, the fourth reversing valve, multiple third ventilation lines and multiple air springs to form a pressurized inflation channel. When the air supply system is in the suspended descent mode, the second reversing valve and the fourth reversing valve are closed, and multiple air springs, multiple third air supply lines, the third reversing valve, the pressurizing valve line, the air pump assembly, the first air supply branch line, the first reversing valve and the air storage tank are sequentially connected to form a pressurized air release channel.

6. The air suspension air supply system according to claim 5, characterized in that, It also includes a manual vent plug, which is located in the area between the fourth reversing valve and the air pump assembly on the first vent pipe.

7. The air suspension air supply system according to claim 5, characterized in that, It also includes a pressure limiting line and a pressure limiting valve disposed on the pressure limiting line. One end of the pressure limiting line is connected to the area downstream of the air pump assembly on the first ventilation branch line, and the other end of the pressure limiting line is connected to the area upstream of the one-way valve on the first ventilation branch line.

8. The air suspension air supply system according to claim 4, characterized in that, The air pump assembly includes an air pump and a motor, the motor being able to drive the air pump to pressurize outside air into the dryer and flow it to the air storage tank.

9. The air suspension air supply system according to claim 4, characterized in that, It also includes a temperature sensor, which is disposed on the third vent line.

10. The air suspension air supply system according to any one of claims 1-9, characterized in that, The air supply system of the air suspension also includes an air filter, which is located on the intake valve and in the area upstream of the first dryer.

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