An air suspension control system with load links

Abstract

This application discloses an air suspension control system with a load connector, relating to the field of air suspension technology. By adding an external load interface and controlling the opening and closing of the air circuit through an electronically controlled pressure-limiting valve, it is possible to inflate an external load. The air suspension control system includes: an air supply valve unit, an air silencer filter dryer, an air tank, and multiple air springs. The air supply valve unit includes a manual vent bolt, an electronically controlled pressure-limiting valve, and a dryer tank. The air supply valve unit is equipped with a first air inlet, a second air inlet, a third air inlet, a fourth air inlet, and multiple fifth air inlets. The manual vent bolt is connected to the first air inlet, the electronically controlled pressure-limiting valve is connected to the second air inlet, and the dryer tank is connected to the third air inlet. The air inlet and outlet of the air silencer filter dryer are connected to the fourth air inlet. The air tank is connected to the dryer tank through the third air inlet. Each of the multiple air springs is connected to one of the multiple fifth air inlets.

Description

Technical Field

[0001] This application relates to the field of air suspension technology, and more specifically, to an air suspension control system with a load joint. Background Technology

[0002] The automotive suspension system is a crucial component of a car. Its primary function is to transmit forces and torques between the wheels and the chassis, buffer impacts from uneven road surfaces, and dampen vibrations to ensure a smooth ride and improve vehicle stability and comfort. With the continuous development of automotive integration and intelligence, and the increasing richness of vehicle functions, automotive suspension products are constantly being updated and iterated to meet the demand for a more comfortable driving experience. This has gradually led to the development of height-adjustable air suspension systems. These systems can adjust the vehicle height according to driving conditions, greatly improving ride comfort and off-road capability in complex road conditions. The core component of an air suspension is the air supply unit, which provides compressed air to the air suspension. Currently, air supply units have evolved from separate units to integrated designs. However, existing air suspension control systems cannot inflate external loads and lack noise reduction structures, resulting in significant noise during intake and exhaust. Furthermore, the dryer is located inside the air supply unit's air path, at the rear end of the air pump. When air is drawn in, the humid air cannot be dried before entering the air supply unit's valve body, posing a risk of water accumulation in the air pump and reversing valve, leading to failure. Additionally, the numerous external pipelines make the system difficult to install. Utility Model Content

[0003] This application provides an air suspension control system with a load joint to solve at least one of the problems in the prior art described above.

[0004] The specific technical solution is as follows:

[0005] This application provides an air suspension control system with a load joint, including:

[0006] The gas supply valve body unit includes a manual venting bolt, an electrically controlled pressure limiting valve, and a drying tank. The gas supply valve body unit is provided with a first vent, a second vent, a third vent, a fourth vent, and multiple fifth vents. The manual venting bolt is connected to the first vent, the electrically controlled pressure limiting valve is connected to the second vent, and the drying tank is connected to the third vent.

[0007] An air silencer filter dryer, wherein the air silencer filter dryer’s inlet and outlet are connected to the fourth vent interface;

[0008] A gas storage tank, which is connected to the drying tank via the third vent interface;

[0009] Multiple air springs are connected one-to-one with each of the multiple fifth ventilation ports;

[0010] When the air suspension control system is in the air tank replenishment state, the third and fourth air inlets are opened by switching the internal valve of the air supply valve body unit, while the first, second, and multiple fifth air inlets are closed. External air is drawn in through the air inlet and outlet of the air silencer filter dryer, and is filtered and dried by the air silencer filter dryer. Then, it is pumped into the air tank through the dryer tank through the current air supply valve body unit, completing the air tank replenishment of the air suspension control system.

[0011] When the air suspension control system is in the air suspension raised state, the third air inlet and multiple fifth air inlets are opened by switching the internal valve of the air supply valve body unit, while the first air inlet, the second air inlet and the fourth air inlet are closed. The gas in the air tank is pumped into multiple air springs through the drying tank and the current open air path of the air supply valve body unit, causing multiple air springs to rise.

[0012] When the air suspension control system is in the air suspension descent state, the internal valve of the air supply valve body unit switches to open the third air inlet and multiple fifth air inlets, while closing the first air inlet, the second air inlet and the fourth air inlet. The gas in the multiple air springs is pumped into the air storage tank through the current air path of the air supply valve body unit via the drying tank, thereby lowering the height of the multiple air springs.

[0013] When the air suspension control system is in the automatic air spring exhaust state, the fourth air inlet and multiple fifth air inlets are opened by switching the internal valve of the air supply valve body unit, while the first air inlet, the second air inlet and the third air inlet are closed. The gas in the multiple air springs is discharged to the external environment through the air silencer filter dryer through the current air passage of the air supply valve body unit.

[0014] When the air suspension control system is in the manual air spring venting state, the first air inlet and multiple fifth air inlets are opened by switching the internal valve of the air supply valve body unit, while the second air inlet, the third air inlet and the fourth air inlet are closed. The manual venting bolt is then manually opened, and the gas in the multiple air springs is discharged into the external environment through the current air passage of the air supply valve body unit and the manual venting bolt.

[0015] When the air suspension control system pumps air from the air tank to an external load, the external load is connected to the electronically controlled pressure relief valve through the second air inlet. The second air inlet and the third air inlet are opened by switching the internal valve of the air supply valve body unit, while the first air inlet, the fourth air inlet, and multiple fifth air inlets are closed. The gas in the air tank passes through the drying tank, and then through the current air path of the air supply valve body unit and the electronically controlled pressure relief valve, and is pumped into the external load, thus completing the air pumping operation of the air suspension control system.

[0016] When the air suspension control system pumps air from outside air to the external load, the external load is connected to the electronically controlled pressure limiting valve through the second air inlet. The internal valve of the air supply valve unit switches between the second and fourth air inlets, while simultaneously closing the first, third, and multiple fifth air inlets. Outside air is drawn in through the air intake and exhaust ports of the air silencer filter dryer, where it is filtered and dried for impurities. Then, it is pumped into the external load through the current air path of the air supply valve unit and the electronically controlled pressure limiting valve, completing the air pumping operation of the air suspension control system.

[0017] In some embodiments of this application, the air supply valve body unit includes an air supply valve group, a reversing valve group, an exhaust valve, a sensor, and an air pump driven by a motor. The first and second air supply lines of the reversing valve group are connected, and multiple air springs are connected to the first and second air supply lines of the reversing valve group through the air supply valve group. The sensor is located at the first air supply line of the reversing valve group. The air storage tank is connected to the third air supply line of the reversing valve group through the drying tank. The fourth air supply line of the reversing valve group is connected to the air inlet of the manual exhaust bolt, one end of the exhaust valve, the air outlet of the air pump, and one end of the electrically controlled pressure limiting valve. The fifth air supply line of the reversing valve group is connected to the air inlet of the air pump and the air inlet and exhaust nozzles of the air silencer filter dryer. The other end of the electrically controlled pressure limiting valve is connected to the second air inlet, and the other end of the exhaust valve is connected to the air inlet and exhaust nozzles of the air silencer filter dryer.

[0018] In some embodiments of this application, the number of air springs is four, and the air supply valve group includes a first air supply valve, a second air supply valve, a third air supply valve, and a fourth air supply valve. One end of the first air supply valve, one end of the second air supply valve, and one end of the third air supply valve are respectively connected to the second air passage of the reversing valve group. One end of the fourth air supply valve is connected to the first air passage of the reversing valve group. The other ends of the first air supply valve, the second air supply valve, the third air supply valve, and the fourth air supply valve are respectively connected to one of the air springs.

[0019] In some embodiments of this application, the first air supply valve, the second air supply valve, the third air supply valve, and the fourth air supply valve are all pilot-operated two-position two-way solenoid valves.

[0020] In some embodiments of this application, the reversing valve group includes a first reversing valve, a second reversing valve, a third reversing valve, and a fourth reversing valve. The gas storage tank is connected to one end of the first reversing valve and one end of the second reversing valve through the drying tank. One end of the third reversing valve is connected to one end of the first gas supply valve, one end of the second gas supply valve, one end of the third gas supply valve, and one end of the fourth gas supply valve. One end of the fourth reversing valve is connected to one end of the first gas supply valve, one end of the second gas supply valve, one end of the third gas supply valve, and one end of the fourth gas supply valve. The other ends of the first reversing valve and the fourth reversing valve are connected to the inlet end of the manual exhaust bolt, one end of the exhaust valve, the outlet end of the air pump, and one end of the electrically controlled pressure limiting valve, respectively. The other ends of the second reversing valve and the third reversing valve are connected to the inlet end of the air pump and the inlet and outlet nozzles of the air silencer filter dryer, respectively.

[0021] In some embodiments of this application, the first reversing valve, the second reversing valve, the third reversing valve, and the fourth reversing valve are all pilot-operated two-position two-way solenoid valves.

[0022] In some embodiments of this application, a one-way valve is provided between the air inlet and outlet of the air silencer filter dryer and the air inlet end of the air pump, the other end of the second reversing valve, and the other end of the third reversing valve.

[0023] In some embodiments of this application, the sensor is a pressure sensor and / or a temperature sensor.

[0024] In some embodiments of this application, the air silencer filter dryer includes a silencer component, a filter component, and a drying component connected in sequence. The silencer component is provided with a silencer element, and the air inlet and outlet are located at the end of the silencer component away from the filter component. The filter component is provided with a filter element, and the drying component is provided with a desiccant, and the air inlet and outlet are located at the end of the drying component away from the filter component.

[0025] External air drawn in through the air inlet and outlet passes sequentially through the silencer, the filter element, and the desiccant, and is then delivered to the air supply valve unit through the air inlet and outlet nozzles. Gas discharged from the air supply valve unit enters the air silencer filter dryer through the air inlet and outlet nozzles, passes sequentially through the desiccant, the filter element, and the silencer, and is then discharged into the external environment through the air inlet and outlet nozzles.

[0026] In some embodiments of this application, a two-way valve is provided between the silencing component and the filtering component. In the non-operating state of the air silencing filter dryer, the two-way valve blocks the gas flow between the silencing component and the filtering component. In the intake state of the air silencing filter dryer, the two-way valve opens the air path from the inlet / outlet port to the inlet / outlet nozzle. In the exhaust state of the air silencing filter dryer, the two-way valve opens the air path from the inlet / outlet nozzle to the inlet / outlet port.

[0027] The beneficial effects of the embodiments of this application are as follows:

[0028] This air suspension control system, by adding an external load interface and controlling the opening and closing of the air circuit through an electronically controlled pressure limiting valve, can connect to an external load to inflate it, improving the utilization rate of the air pump. Furthermore, the air silencer filter dryer is separated from the air supply valve unit and located at the air inlet end of the air supply valve unit, allowing the air to be dried before entering the air supply valve unit, thus ensuring the dryness of the air suspension control system. Simultaneously, a drying tank is installed between the air tank and the air supply valve unit, ensuring the air inside the system is dried during each operation, further guaranteeing the dryness of the air suspension control system. In addition, the intake and exhaust pipes are combined into a single pipe, reducing the number of pipes and simplifying the overall vehicle layout. The air silencer filter dryer in this air suspension control system integrates the silencer, dryer, and filter into one unit, improving integration, reducing the number of components, and lowering the noise during system intake and exhaust. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram illustrating the structural principle of an air suspension control system with a load joint, provided in an embodiment of this application;

[0031] Explanation of reference numerals in the attached drawings: 1 is the air supply valve unit; 2 is the manual exhaust bolt; 3 is the electrically controlled pressure limiting valve; 4 is the drying tank; 5 is the first air inlet; 6 is the second air inlet; 7 is the third air inlet; 8 is the fourth air inlet; 9 is the fifth air inlet; 10 is the air silencer filter dryer; 11 is the air inlet and exhaust nozzle; 12 is the air storage tank; 13 is the air spring; 14 is the air inlet and exhaust port; 15 is the air supply valve assembly; 16 is the reversing valve assembly; 17 is the exhaust valve; 18 is the sensor; 19 is the motor; 20 is the air pump; 21 is the first air supply valve; 22 is the second air supply valve; 23 is the third air supply valve; 24 is the fourth air supply valve; 25 is the first reversing valve; 26 is the second reversing valve; 27 is the third reversing valve; 28 is the fourth reversing valve; 29 is the one-way valve; 30 is the silencer component; 31 is the filter component; 32 is the drying component; 33 is the external load. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The terms "comprising" and "having," and any variations thereof, in the embodiments and drawings of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or devices.

[0034] This application discloses an air suspension control system with a load connector. By adding an external load interface and controlling the opening and closing of the air circuit through an electronically controlled pressure relief valve, it is possible to inflate an external load. Detailed descriptions follow.

[0035] Figure 1 An air suspension control system with a load joint according to an embodiment of this application is shown. Figure 1 As shown, the air suspension control system includes: an air supply valve body unit 1, an air silencer filter dryer 10, an air tank 12, and multiple air springs 13. The air supply valve body unit 1 is the air path mechanism for switching the airflow direction in this embodiment of the air suspension control system. The air supply valve body unit 1 is provided with a first air inlet 5, a second air inlet 6, a third air inlet 7, a fourth air inlet 8, and multiple fifth air inlets 9. In this embodiment, the air supply valve body unit 1 includes a manual venting bolt 2, an electrically controlled pressure limiting valve 3, and a dryer tank 4. The electrically controlled pressure limiting valve 3 is connected to the second air inlet 6 to enable quick-connect inflation of the external load 33. The manual venting bolt 2 is connected to the first air inlet 5 to enable manual venting of the system. Additionally, the dryer tank 4 is connected to the third air inlet 7, which is the air supply valve. At the air storage port of body unit 1, the air storage tank 12 is connected to the drying tank 4 through the third air inlet 7. The air storage tank 12 is used in the air suspension control system of this application embodiment to store filtered and dried gas for use by multiple air springs 13 in the air suspension control system. The air storage tank 12 is connected to the third air inlet 7 to compress the gas supplemented by the air silencer filter dryer 10 into the air storage tank 12, or to recover the gas in the multiple air springs 13 into the air storage tank 12. At the same time, when the gas circulates inside the air suspension control system, it passes through the drying tank 4 each time it circulates, thereby ensuring that there is no water vapor in the internal air path of the air suspension control system. The air silencer filter dryer 10 is used to filter and dry the air entering the air suspension control system, and to reduce the noise during system intake and exhaust. The air silencer filter dryer 10 has intake and exhaust nozzles 11 and intake and exhaust holes 14 at both ends. In this embodiment, the air supply valve body unit 1 combines the intake pipe and the exhaust pipe into one pipe. The fourth vent 8 is the intake and exhaust port of the air supply valve body unit 1. The intake and exhaust nozzles 11 of the air silencer filter dryer 10 are connected to the fourth vent 8, which not only reduces the number of pipes and facilitates the overall vehicle layout, but also ensures that the gas entering the air supply valve body unit 1 is dried, ensuring the internal dryness of the air suspension control system and improving the service life of the internal components of the air suspension control system. In addition, when exhausting through the air silencer filter dryer 10, the gas backflushing function can be used to extend the service life of its internal desiccant, thereby ensuring the drying effect of the air silencer filter dryer 10. Multiple air springs 13 are connected one-to-one with multiple fifth vent ports 9. By filling or releasing gas into the multiple air springs 13, the height of each air spring 13 is changed, thereby adjusting the height / level of the car body relative to the axle or road surface.

[0036] When the air suspension control system is in the air tank replenishment state, the third air inlet 7 and the fourth air inlet 8 are opened by switching the internal valve of the air supply valve body unit 1, while the first air inlet 5, the second air inlet 6 and multiple fifth air inlets 9 are closed. External air is drawn in through the air inlet and outlet ports 14 of the air silencer filter dryer 10, and is filtered and dried by the air silencer filter dryer 10. Then, it is pumped into the air tank 12 through the drying tank 4 through the current air supply valve body unit 1, completing the air tank replenishment of the air suspension control system.

[0037] When the air suspension control system is in the air-suspended raised state, the internal valve of the air supply valve body unit 1 switches to open the third air port 7 and multiple fifth air ports 9, while closing the first air port 5, the second air port 6 and the fourth air port 8. The gas in the air tank 12 is pumped into multiple air springs 13 through the drying tank 4 and the currently open air path of the air supply valve body unit 1, causing the multiple air springs 13 to rise.

[0038] When the air suspension control system is in the unsuspended descent state, the internal valve of the air supply valve body unit 1 switches to open the third air port 7 and multiple fifth air ports 9, while closing the first air port 5, the second air port 6 and the fourth air port 8. The gas in the multiple air springs 13 is recycled and pumped into the air storage tank 12 through the current air path of the air supply valve body unit 1 via the drying tank 4, thereby lowering the height of the multiple air springs 13.

[0039] When the air suspension control system is in the automatic air spring exhaust state, the internal valve of the air supply valve body unit 1 switches to open the fourth air port 8 and multiple fifth air ports 9, while closing the first air port 5, the second air port 6 and the third air port 7. The gas in the multiple air springs 13 is discharged to the external environment through the current air passage of the air supply valve body unit 1 and the air silencer filter dryer 10.

[0040] When the air suspension control system is in the manual air spring venting state, the first air inlet 5 and multiple fifth air inlets 9 are opened by switching the internal valve of the air supply valve body unit 1, while the second air inlet 6, third air inlet 7 and fourth air inlet 8 are closed. The manual venting bolt 2 is then manually opened, and the gas in the multiple air springs 13 is discharged to the external environment through the currently open air passage of the air supply valve body unit 1 and the manual venting bolt 2.

[0041] When the air suspension control system pumps air from the air tank 12 to the external load 33, it connects the external load 33 to the electronically controlled pressure relief valve 3 through the second air inlet 6. The internal valve of the air supply valve body unit 1 switches the second air inlet 6 and the third air inlet 7 to open, while closing the first air inlet 5, the fourth air inlet 8 and multiple fifth air inlets 9. The gas in the air tank 12 passes through the drying tank 4 and is pumped into the external load 33 through the current air path of the air supply valve body unit 1 and the electronically controlled pressure relief valve 3, thus completing the air pumping of the air suspension control system to the external load.

[0042] When the air suspension control system pumps air from outside air to the external load 33, it connects the external load 33 to the electronically controlled pressure relief valve 3 through the second air inlet 6. The internal valve of the air supply valve body unit 1 switches the second air inlet 6 and the fourth air inlet 8 to open, while closing the first air inlet 5, the third air inlet 7 and multiple fifth air inlets 9. Outside air is drawn in through the air inlet and outlet ports 14 of the air silencer filter dryer 10 and filtered and dried by the air silencer filter dryer 10. Then, it is pumped into the external load 33 through the current air passage of the air supply valve body unit 1 and the electronically controlled pressure relief valve 3, thus completing the air pumping of air from outside by the air suspension control system.

[0043] In some embodiments, such as Figure 1As shown, the air supply valve body unit 1 includes an air supply valve assembly 15, a reversing valve assembly 16, an exhaust valve 17, a sensor 18, and an air pump 20 driven by a motor 19. The reversing valve assembly 16 is mainly used for switching the flow direction of the overall air path in the air supply valve body unit 1. It is equipped with a first air supply pipe, a second air supply pipe, a third air supply pipe, a fourth air supply pipe, and a fifth air supply pipe. The first and second air supply pipes of the reversing valve assembly 16 are connected. The air supply valve assembly 15 is mainly used for controlling the air flow of multiple air springs 13 in the air supply valve body unit 1. The multiple air springs 13 are connected to the first and second air supply pipes of the reversing valve assembly 16 through the air supply valve assembly 15. The sensor 18 is located in the first air supply pipe of the reversing valve assembly 16. At this location, the air storage tank 12 is connected to the third vent pipe of the reversing valve assembly 16 via the drying tank 4. The fourth vent pipe of the reversing valve assembly 16 is connected to the air inlet of the manual vent bolt 2, one end of the vent valve 17, the air outlet of the air pump 20, and one end of the electrically controlled pressure limiting valve 3. The fifth vent pipe of the reversing valve assembly 16 is connected to the air inlet of the air pump 20 and the air inlet and outlet nozzles 11 of the air silencer filter dryer 10. The other end of the electrically controlled pressure limiting valve 3 is connected to the second vent interface 6, and the other end of the vent valve 17 is connected to the air inlet and outlet nozzles 11 of the air silencer filter dryer 10. Furthermore, in the specific implementation process, the sensor 18 is a pressure sensor and / or a temperature sensor to monitor the pressure and temperature of multiple air springs 13, so as to facilitate timely warning in case of abnormalities, thereby ensuring the overall safe use of the air suspension control system.

[0044] In this embodiment, there are four air springs 13, with one air spring 13 installed at each of the four wheels of the car, corresponding to... Figure 1 As shown, the air supply valve assembly 15 includes a first air supply valve 21, a second air supply valve 22, a third air supply valve 23, and a fourth air supply valve 24, each corresponding to one of the four air springs 13. Specifically, one end of the first air supply valve 21, one end of the second air supply valve 22, and one end of the third air supply valve 23 are connected to the second air passage of the reversing valve assembly 16, and one end of the fourth air supply valve 24 is connected to the first air passage of the reversing valve assembly 16. The other ends of the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, and the fourth air supply valve 24 are each connected to an air spring 13. In practical implementation, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, and the fourth air supply valve 24 are all pilot-operated two-position two-way solenoid valves to achieve precise control of the air valves.

[0045] Furthermore, such as Figure 1As shown, the reversing valve group 16 includes a first reversing valve 25, a second reversing valve 26, a third reversing valve 27, and a fourth reversing valve 28. The gas storage tank 12 is connected to one end of the first reversing valve 25 and one end of the second reversing valve 26 via the drying tank 4. One end of the third reversing valve 27 is connected to one end of the first gas supply valve 21, one end of the second gas supply valve 22, one end of the third gas supply valve 23, and one end of the fourth gas supply valve 24. One end of the fourth reversing valve 28 is connected to one end of the first gas supply valve 21, one end of the second gas supply valve 22, one end of the third gas supply valve 23, and one end of the fourth gas supply valve 24. The other ends of the first reversing valve 25 and the fourth reversing valve 28 are connected to the air inlet of the manual exhaust bolt 2, one end of the exhaust valve 17, the air outlet of the air pump 20, and one end of the electrically controlled pressure limiting valve 3, respectively. The other ends of the second reversing valve 26 and the third reversing valve 27 are connected to the air inlet of the air pump 20 and the air inlet and exhaust nozzles 11 of the air silencer filter dryer 10, respectively. In the specific implementation process, the first reversing valve 25, the second reversing valve 26, the third reversing valve 27 and the fourth reversing valve 28 are all pilot-operated two-position two-way solenoid valves to achieve precise control of the valve switching.

[0046] In addition, such as Figure 1 As shown, a one-way valve 29 is provided between the air inlet and outlet nozzles 11 of the air silencer filter dryer 10 and the air inlet end of the air pump 20, the other end of the second reversing valve 26, and the other end of the third reversing valve 27 to prevent gas from flowing in reverse.

[0047] In other embodiments, such as Figure 1As shown, the air silencer filter dryer 10 includes a silencer component 30, a filter component 31, and a drying component 32 connected in sequence. The silencer component 30 contains a silencer element (not shown in the figure), and the inlet / outlet port 14 is located at the end of the silencer component 30 away from the filter component 31. The filter component 31 contains a filter element (not shown in the figure), and the drying component 32 contains a desiccant (not shown in the figure), with the inlet / outlet port 11 located at the end of the drying component 32 away from the filter component 31. External air drawn in through the inlet / outlet port 14 passes sequentially through the silencer component, filter element, and desiccant, and is then delivered to the air supply valve unit 1 through the inlet / outlet port 11. Integrating the silencer, dryer, and filter improves the device's integration, reduces the number of components, filters and dries impurities in the gas entering the air supply valve unit 1, and reduces the noise of the air suspension control system during air intake. In addition, the gas discharged from the air supply valve body unit 1 enters the air silencer filter dryer 10 through the air inlet and outlet nozzles 11, passes through the desiccant, filter element, and silencer in sequence, and is discharged to the external environment through the air inlet and outlet holes 14. During this process, when the dry gas is discharged to the desiccant, it can absorb the moisture in the desiccant and discharge the absorbed moisture to the outside of the air silencer filter dryer 10, thereby reducing the saturation of the desiccant and ensuring that the desiccant can be reused for a long time. At the same time, when the gas passes through the filter element, it can carry away some impurities in the filter element, making the filter element's service life longer, and can also reduce the noise of the air suspension control system exhaust.

[0048] Furthermore, a two-way valve (not shown in the figure) is provided between the silencing component 30 and the filter component 31. In the non-operating state of the air silencing filter dryer 10, the two-way valve blocks the gas flow between the silencing component 30 and the filter component 31. In the intake state of the air silencing filter dryer 10, the two-way valve opens the air path from the inlet / outlet port 14 to the inlet / outlet nozzle 11. In the exhaust state of the air silencing filter dryer 10, the two-way valve opens the air path from the inlet / outlet nozzle 11 to the inlet / outlet port 14. It should be noted that the structure of the two-way valve in this embodiment is not limited; any structure that can achieve the above-mentioned function of the two-way valve is acceptable.

[0049] The above describes the various components of the air suspension control system with load joint provided in this embodiment and their connection relationships. The following section will discuss further details. Figure 1 The working principle of an air suspension control system with a load joint is described in detail.

[0050] When the air suspension control system is in the air tank replenishment state, the first reversing valve 25 and the fourth reversing valve 28 are energized and opened, while the second reversing valve 26, the third reversing valve 27, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, the fourth air supply valve 24, and the exhaust valve 17 are de-energized and closed. Simultaneously, the motor 19 is activated, thus ensuring that the air passages of the first reversing valve 25 and the fourth reversing valve 28 are both connected, and the air passages of the second reversing valve 26 and the third reversing valve 27 are both closed. In the disconnected state, the air passages of the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, the fourth air supply valve 24, and the exhaust valve 17 are also disconnected. The motor 19 drives the air pump 20 to draw in external air through the air inlet and outlet ports 14 of the air silencer filter dryer 10. After filtering and drying impurities, the air is compressed into the air storage tank 12 through the drying tank 4 via the air passage in the air supply valve body unit 1, thus completing the air replenishment of the air storage tank of the air suspension control system.

[0051] When the air suspension control system is in the air-suspended raised state, the second reversing valve 26, the fourth reversing valve 28, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, and the fourth air supply valve 24 are energized and opened, while the first reversing valve 25, the third reversing valve 27, and the exhaust valve 17 are de-energized and closed. The motor 19 is also activated, thus connecting the air passages of the second reversing valve 26, the fourth reversing valve 28, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, and the fourth air supply valve 24, while disconnecting the air passages of the first reversing valve 25, the third reversing valve 27, and the exhaust valve 17. The motor 19 drives the air pump 20 to pump the gas from the air tank 12 through the connected air passage in the air supply valve body unit 1 and into the four air springs 13 via the drying tank 4, causing the four air springs 13 to rise.

[0052] When the air suspension control system is in the unsuspended descent state, the first reversing valve 25, the third reversing valve 27, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, and the fourth air supply valve 24 are energized and opened, while the second reversing valve 26, the fourth reversing valve 28, and the exhaust valve 17 are de-energized and closed. The motor 19 is also activated, thus connecting the air passages of the first reversing valve 25, the third reversing valve 27, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, and the fourth air supply valve 24, while disconnecting the air passages of the second reversing valve 26, the fourth reversing valve 28, and the exhaust valve 17. The motor 19 drives the air pump 20 to pump the gas from the four air springs 13 through the connected air passages in the air supply valve body unit 1, via the drying tank 4, into the air storage tank 12, thereby lowering the height of the four air springs 13.

[0053] When the air suspension control system is in the automatic air spring exhaust state, the fourth reversing valve 28, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, the fourth air supply valve 24, and the exhaust valve 17 are energized and opened. The third reversing valve 27 can also be energized and opened. The state of the third reversing valve 27 is not restricted here. The first reversing valve 25 and the second reversing valve 26 are de-energized and closed, and the motor 19 is turned on. Since the internal air pressure of the air suspension control system is greater than the external air pressure, the air passages of the third reversing valve 27, the fourth reversing valve 28, the exhaust valve 17, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, and the fourth air supply valve 24 are all in the connected state, while the air passages of the first reversing valve 25 and the second reversing valve 26 are all in the disconnected state. The gas in the four air springs 13 passes through the connected air passage in the air supply valve body unit 1 and is discharged to the external environment through the air silencer filter dryer 10.

[0054] When the air suspension control system is in the manual air spring exhaust state, the third reversing valve 27, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, and the fourth air supply valve 24 are energized and opened, and the manual exhaust bolt 2 is manually opened. The first reversing valve 25, the second reversing valve 26, the fourth reversing valve 28, and the exhaust valve 17 are de-energized and closed, and the motor 19 is turned on. This makes the air passages of the third reversing valve 27, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, and the fourth air supply valve 24 all connected, while the air passages of the first reversing valve 25, the second reversing valve 26, the fourth reversing valve 28, and the exhaust valve 17 are all disconnected. The gas in the four air springs 13 is discharged to the external environment through the connected air passages in the air supply valve body unit 1 and through the manual exhaust bolt 2.

[0055] When the air suspension control system pumps air from the air tank 12 to the external load 33, the external load 33 is connected to the electronically controlled pressure relief valve 3 through the second air inlet 6. The second reversing valve 26 and the electronically controlled pressure relief valve 3 are energized and opened. The first reversing valve 25, the third reversing valve 27, the fourth reversing valve 28, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, the fourth air supply valve 24, and the exhaust valve 17 are de-energized and closed, and the motor 19 is turned on, thereby causing the second reversing valve 26 to open. The air passages of the electrically controlled pressure limiting valve 3 are all in the connected state, while the air passages of the first reversing valve 25, the third reversing valve 27, the fourth reversing valve 28, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, the fourth air supply valve 24, and the exhaust valve 17 are all in the disconnected state. The gas in the air storage tank 12 is pumped into the external load 33 through the air passage in the air supply valve body unit 1 that is in the connected state, via the drying tank 4 and the electrically controlled pressure limiting valve 3, thus completing the air inflation of the air suspension control system.

[0056] When the air suspension control system pumps air from outside the system to the external load 33, the external load 33 is connected to the electronically controlled pressure relief valve 3 through the second air inlet 6. The electronically controlled pressure relief valve 3 is energized and opened. The first reversing valve 25, the second reversing valve 26, the third reversing valve 27, the fourth reversing valve 28, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, the fourth air supply valve 24, and the exhaust valve 17 are de-energized and closed. Simultaneously, the motor 19 is activated, thus connecting the air path of the electronically controlled pressure relief valve 3. The first reversing valve 25, the second reversing valve 26, the third reversing valve 27, the fourth reversing valve 28, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, the fourth air supply valve 24, and the exhaust valve 17 are de-energized and closed. The air passages of the second reversing valve 26, the third reversing valve 27, the fourth reversing valve 28, the first air supply valve 21, the second air supply valve 22, the third air supply valve 23, the fourth air supply valve 24, and the exhaust valve 17 are all in the disconnected state. External air is drawn in through the inlet and outlet ports 14 of the air silencer filter dryer 10, and after being filtered and dried by the air silencer filter dryer 10, it is pumped into the external load 33 through the air passage in the air supply valve body unit 1, which is in the connected state, via the electronically controlled pressure limiting valve 3, thus completing the air inflation of the air suspension control system.

[0057] In summary, this application discloses an air suspension control system with a load connector. By adding an external load interface and controlling the opening and closing of the air circuit through an electronically controlled pressure limiting valve, an external load can be connected to inflate it, improving the utilization rate of the air pump. Furthermore, the air silencer filter dryer is separated from the air supply valve unit and located at the air inlet end of the air supply valve unit, allowing the gas to be dried before entering the air supply valve unit, thus ensuring the dryness inside the air suspension control system. Simultaneously, a drying tank is installed between the air storage tank and the air supply valve unit, ensuring the gas inside the system is dried during each operation, further guaranteeing the dryness inside the air suspension control system. Additionally, the intake and exhaust pipes are combined into a single pipe, reducing the number of pipes and facilitating vehicle layout. The air silencer filter dryer in this air suspension control system integrates the silencer, dryer, and filter into one unit, improving integration, reducing the number of components, and lowering the noise during system intake and exhaust.

[0058] It will be understood by those skilled in the art that the accompanying drawings are merely schematic diagrams of one embodiment, and the components shown in the drawings are not necessarily essential for implementing this invention. It should also be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0059] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0060] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope described in the claims.

Claims

1. An air suspension control system with a load joint, characterized in that, include: The gas supply valve body unit includes a manual venting bolt, an electrically controlled pressure limiting valve, and a drying tank. The gas supply valve body unit is provided with a first vent, a second vent, a third vent, a fourth vent, and multiple fifth vents. The manual venting bolt is connected to the first vent, the electrically controlled pressure limiting valve is connected to the second vent, and the drying tank is connected to the third vent. An air silencer filter dryer, wherein the air silencer filter dryer’s inlet and outlet are connected to the fourth vent interface; A gas storage tank, which is connected to the drying tank via the third vent interface; Multiple air springs are connected one-to-one with each of the multiple fifth ventilation ports; When the air suspension control system is in the air tank replenishment state, the third and fourth air inlets are opened by switching the internal valve of the air supply valve body unit, while the first, second, and multiple fifth air inlets are closed. External air is drawn in through the air inlet and outlet of the air silencer filter dryer, and is filtered and dried by the air silencer filter dryer. Then, it is pumped into the air tank through the drying tank via the current air supply valve body unit, thus completing the air tank replenishment of the air suspension control system. When the air suspension control system is in the air suspension raised state, the third air inlet and multiple fifth air inlets are opened by switching the internal valve of the air supply valve body unit, while the first air inlet, the second air inlet and the fourth air inlet are closed. The gas in the air tank is pumped into multiple air springs through the drying tank and the current open air path of the air supply valve body unit, causing multiple air springs to rise. When the air suspension control system is in the air suspension descent state, the internal valve of the air supply valve body unit switches to open the third air inlet and multiple fifth air inlets, while closing the first air inlet, the second air inlet and the fourth air inlet. The gas in the multiple air springs is pumped into the air storage tank through the drying tank via the current air path of the air supply valve body unit, thereby lowering the height of the multiple air springs. When the air suspension control system is in the automatic air spring exhaust state, the fourth air inlet and multiple fifth air inlets are opened by switching the internal valve of the air supply valve body unit, while the first air inlet, the second air inlet and the third air inlet are closed. The gas in the multiple air springs is discharged to the external environment through the air silencer filter dryer through the current air passage of the air supply valve body unit. When the air suspension control system is in the manual air spring venting state, the first air inlet and multiple fifth air inlets are opened by switching the internal valve of the air supply valve body unit, while the second air inlet, the third air inlet and the fourth air inlet are closed. The manual venting bolt is then manually opened, and the gas in the multiple air springs is discharged into the external environment through the current air passage of the air supply valve body unit and the manual venting bolt. When the air suspension control system pumps air from the air tank to an external load, the external load is connected to the electronically controlled pressure relief valve through the second air inlet. The second air inlet and the third air inlet are opened by switching the internal valve of the air supply valve body unit, while the first air inlet, the fourth air inlet, and multiple fifth air inlets are closed. The gas in the air tank passes through the drying tank, and then through the current air path of the air supply valve body unit and the electronically controlled pressure relief valve, and is pumped into the external load, thus completing the air pumping operation of the air suspension control system. When the air suspension control system pumps air from outside air to the external load, the external load is connected to the electronically controlled pressure limiting valve through the second air inlet. The internal valve of the air supply valve unit switches between the second and fourth air inlets, while simultaneously closing the first, third, and multiple fifth air inlets. Outside air is drawn in through the air intake and exhaust ports of the air silencer filter dryer, where it is filtered and dried for impurities. Then, it is pumped into the external load through the current air path of the air supply valve unit and the electronically controlled pressure limiting valve, completing the air pumping operation of the air suspension control system.

2. The air suspension control system with a load joint according to claim 1, characterized in that, The air supply valve unit includes an air supply valve group, a reversing valve group, an exhaust valve, a sensor, and an air pump driven by a motor. The first and second air supply lines of the reversing valve group are connected, and multiple air springs are connected to the first and second air supply lines of the reversing valve group through the air supply valve group. The sensor is located at the first air supply line of the reversing valve group. The air storage tank is connected to the third air supply line of the reversing valve group through the drying tank. The fourth air supply line of the reversing valve group is connected to the air inlet of the manual exhaust bolt, one end of the exhaust valve, the air outlet of the air pump, and one end of the electrically controlled pressure limiting valve. The fifth air supply line of the reversing valve group is connected to the air inlet of the air pump and the air inlet and exhaust nozzles of the air silencer filter dryer. The other end of the electrically controlled pressure limiting valve is connected to the second air inlet, and the other end of the exhaust valve is connected to the air inlet and exhaust nozzles of the air silencer filter dryer.

3. The air suspension control system with a load joint according to claim 2, characterized in that, The number of air springs is four. The air supply valve group includes a first air supply valve, a second air supply valve, a third air supply valve, and a fourth air supply valve. One end of the first air supply valve, one end of the second air supply valve, and one end of the third air supply valve are respectively connected to the second air passage of the reversing valve group. One end of the fourth air supply valve is connected to the first air passage of the reversing valve group. The other ends of the first air supply valve, the second air supply valve, the third air supply valve, and the fourth air supply valve are respectively connected to one of the air springs.

4. The air suspension control system with a load joint according to claim 3, characterized in that, The first air supply valve, the second air supply valve, the third air supply valve, and the fourth air supply valve are all pilot-operated two-position two-way solenoid valves.

5. The air suspension control system with a load joint according to claim 3, characterized in that, The reversing valve assembly includes a first reversing valve, a second reversing valve, a third reversing valve, and a fourth reversing valve. The air storage tank is connected to one end of the first reversing valve and one end of the second reversing valve via the drying tank. One end of the third reversing valve is connected to one end of the first air supply valve, one end of the second air supply valve, one end of the third air supply valve, and one end of the fourth air supply valve. One end of the fourth reversing valve is connected to one end of the first air supply valve, one end of the second air supply valve, one end of the third air supply valve, and one end of the fourth air supply valve. The other ends of the first reversing valve and the fourth reversing valve are connected to the air inlet of the manual exhaust bolt, one end of the exhaust valve, the air outlet of the air pump, and one end of the electrically controlled pressure limiting valve, respectively. The other ends of the second reversing valve and the third reversing valve are connected to the air inlet of the air pump and the air inlet and exhaust nozzles of the air silencer filter dryer, respectively.

6. The air suspension control system with a load joint according to claim 5, characterized in that, The first reversing valve, the second reversing valve, the third reversing valve, and the fourth reversing valve are all pilot-operated two-position two-way solenoid valves.

7. The air suspension control system with a load joint according to claim 5, characterized in that, A one-way valve is provided between the air inlet and outlet of the air silencer filter dryer and the air inlet of the air pump, the other end of the second reversing valve, and the other end of the third reversing valve.

8. The air suspension control system with a load joint according to claim 2, characterized in that, The sensor is a pressure sensor and / or a temperature sensor.

9. The air suspension control system with a load joint according to claim 1, characterized in that, The air silencer filter dryer includes a silencer component, a filter component, and a drying component connected in sequence. The silencer component is provided with a silencer element, and the air inlet and outlet are located at the end of the silencer component away from the filter component. The filter component is provided with a filter element, and the drying component is provided with a desiccant, and the air inlet and outlet are located at the end of the drying component away from the filter component. External air drawn in through the air inlet and outlet passes sequentially through the silencer, the filter element, and the desiccant, and is then delivered to the air supply valve unit through the air inlet and outlet nozzles. Gas discharged from the air supply valve unit enters the air silencer filter dryer through the air inlet and outlet nozzles, passes sequentially through the desiccant, the filter element, and the silencer, and is then discharged into the external environment through the air inlet and outlet nozzles.

10. The air suspension control system with a load joint according to claim 9, characterized in that, A two-way valve is provided between the silencing component and the filter component. In the non-working state of the air silencing filter dryer, the two-way valve blocks the gas flow between the silencing component and the filter component. In the intake state of the air silencing filter dryer, the two-way valve opens the air path from the inlet / outlet port to the inlet / outlet nozzle. In the exhaust state of the air silencing filter dryer, the two-way valve opens the air path from the inlet / outlet nozzle to the inlet / outlet port.

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