Air supply system and air spring system with same

Abstract

The utility model relates to the field of vehicle parts, in particular to an air supply system and an air spring system with the air supply system. The gas storage unit comprises a first gas storage unit and a second gas storage unit; the first air storage unit and the second air storage unit can be used for controlling the air pressure in the air spring assembly; a gas pressure difference exists between the gas pressure in the first gas storage unit and the gas pressure in the second gas storage unit; according to the air supply system, the first air storage unit and the second air storage unit with the pressure difference are used in cooperation, the speed adjusting requirements of different working conditions can be met, when a vehicle lifts, air is supplied through two loops of the first air storage unit and the second air storage unit, the lifting speed is increased, and when the vehicle descends, the lifting speed is increased. And air can be exhausted to two loops of the first air storage unit and the second air storage unit, the descending speed is increased, and therefore the adjusting response speed of the air spring can be increased.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts, specifically an air supply system and an air spring system having the air supply system. Background Technology

[0002] More and more passenger cars are now equipped with air suspension systems, which allow the vehicle to lift and lower itself.

[0003] An air spring device for a vehicle is known from document 201580019730.9 - Integrated Air Supply Unit, which includes the necessary components of a current air spring system.

[0004] Air suspension systems on the market are divided into open systems and closed systems. The principle of an open system is to draw air from the atmosphere, compress it through an air compressor, and store the compressed high-pressure gas in an air tank. When the vehicle needs to be lifted, the air tank supplies air to the air springs, and when the vehicle needs to be lowered, the air springs exhaust the air directly into the atmosphere.

[0005] The principle of a closed system is to transfer air between the air spring and the air tank. When the vehicle needs to be lifted, air is drawn from the air tank, discharged through the compressor, and then into the air spring. When the vehicle needs to be lowered, air is drawn from the air spring, discharged through the compressor, and then into the air tank.

[0006] In scenarios where vehicle height adjustment is used, the easy-to-get-in-and-out mode requires a quick adjustment speed; SUVs or pickup trucks need to lower quickly, while sports cars or sedans need to raise quickly. The easy-to-load mode lowers the rear axle height to facilitate loading heavy items into the trunk or cargo bed, and also requires a quick lowering.

[0007] When a vehicle encounters an emergency, such as when wading through water, a rapid lifting speed is required. At higher speeds, for vehicle safety, rapid speed adjustments are not necessary.

[0008] In existing technologies, open systems require exhaust to the atmosphere, resulting in energy waste and higher power consumption. Their gas storage tanks generally have higher pressures, requiring compressors with higher power.

[0009] When the vehicle height is continuously adjusted, there is not enough time to inflate the air tank, so the air spring can only be inflated directly, resulting in a very slow vehicle height lifting speed.

[0010] The exhaust process of an open system is also the desiccant regeneration process, which requires pressure reduction through a throttling orifice, thus limiting the rate of pressure reduction.

[0011] In a closed system, the pressure in the air tank should not be too high. If it is too high, the exhaust speed will be slower, which will result in a slower descent of the vehicle height.

[0012] The pressure in the air tank should not be too low. If it is too low, the inflation speed will be slow, which will result in a slower vehicle height increase. In order to balance the lifting speed and the lowering speed, the air tank pressure is generally close to the design pressure of the air spring, thus limiting the lifting speed and the lowering speed.

[0013] Furthermore, when the vehicle is fully loaded, the air spring pressure is higher and the air tank pressure is lower, resulting in a slower vehicle lifting speed. When the vehicle is unloaded, the air spring pressure is lower and the air tank pressure is higher, resulting in a slower descent speed.

[0014] In summary, regardless of whether the existing open or closed systems are available, their lifting and lowering speeds cannot be very fast due to various reasons. This makes them less suitable for convenient loading and unloading modes, rendering them somewhat useless. Furthermore, their lifting speed is also limited in emergency situations.

[0015] Open systems also suffer from energy waste and poor continuous adjustability.

[0016] Therefore, in order to solve or improve at least one of the above problems, it is necessary to optimize the design of the existing air supply system or air spring system. Utility Model Content

[0017] The purpose of this invention is to provide a gas supply system with a fast response speed.

[0018] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0019] An air supply system includes an air storage unit connected to an air spring assembly;

[0020] The gas storage unit includes a first gas storage unit and a second gas storage unit;

[0021] Both the first air storage unit and the second air storage unit can be used to control the air pressure in the air spring assembly;

[0022] There is a gas pressure difference between the gas pressure in the first gas storage unit and the gas pressure in the second gas storage unit.

[0023] The gas pressure in the first gas storage unit is not greater than the gas pressure in the second gas storage unit.

[0024] The gas pressure in the first gas storage unit is less than the minimum gas pressure in the air spring of the air spring assembly; the gas pressure in the second gas storage unit is greater than the maximum gas pressure in the air spring of the air spring assembly.

[0025] The gas supply system also includes a communication control unit, through which the first gas storage unit and the second gas storage unit are connected.

[0026] The gas supply system also includes a gas supply unit; the gas supply unit is connected to the gas storage unit;

[0027] The gas supply unit includes a valve body and an ECU; the valve body is connected to a gas pressure control unit.

[0028] The air pressure control unit includes an air supply unit and an air spring control unit;

[0029] The air supply unit is connected to the air spring control unit via a connection control unit;

[0030] The connection control unit includes a first control unit and a second control unit;

[0031] The air inlet of the air supply unit is connected to the air spring control unit via the first control unit; the air outlet of the air supply unit is connected to the air spring control unit via the second control unit.

[0032] The first gas storage unit in the gas storage unit is connected to the first control unit; the second gas storage unit in the gas storage unit is connected to the second control unit.

[0033] Both the first control unit and the second control unit are equipped with at least one control valve.

[0034] The gas supply unit is connected to the second control unit through the drying unit;

[0035] The gas supply unit includes a compressor;

[0036] The drying unit includes a dryer; the compressor includes at least one air compression pump;

[0037] The first gas storage unit includes a first gas storage tank, which is connected to a first control unit;

[0038] The second gas storage unit includes a second gas storage tank, which is connected to the second control unit.

[0039] The air supply unit is connected to an air replenishment unit at its air inlet end; the air replenishment unit includes an air replenishment pipe, and a filter is connected to the end of the air replenishment pipe away from the air supply unit; a one-way valve is provided on the air replenishment pipe; the air supply unit is connected to an exhaust unit at its air outlet end, and the exhaust unit includes an exhaust pipe, and a tenth control valve is provided on the exhaust pipe.

[0040] The second control unit is connected to the first control unit, and the second control unit is connected to the cavity spring control unit through the first control unit.

[0041] The air pressure control unit further includes a detection unit connected to the first control unit; the detection unit includes a pressure sensor disposed on the first control unit.

[0042] An air spring system for a vehicle includes an air spring assembly comprising a plurality of air springs; the air spring assembly is connected to the air supply system.

[0043] The advantages of this utility model are:

[0044] This utility model discloses an air supply system and an air spring system having the air supply system.

[0045] The air supply system disclosed in this utility model, through the combined use of a first air storage unit and a second air storage unit with a pressure difference, can meet the adjustment speed requirements under different working conditions. When the vehicle is lifted, air is supplied by two circuits of the first air storage unit and the second air storage unit to increase the lifting speed. When the vehicle is lowered, exhaust can also be supplied to the two circuits of the first air storage unit and the second air storage unit to increase the lowering speed. This can improve the adjustment response speed of the air spring in the vehicle using the air supply system. Attached Figure Description

[0046] The following is a brief explanation of the contents depicted in the accompanying drawings of this utility model specification:

[0047] Figure 1 This is a schematic diagram of the structure of the first embodiment of the present utility model.

[0048] Figure 2 This is a schematic diagram of the structure of the second embodiment of the present utility model.

[0049] Figure 3 This is a structural schematic diagram of the third embodiment of the present utility model.

[0050] Figure 4 This is a schematic diagram of the structure of the throttle valve and the check valve arranged in the valve body in the first embodiment of this utility model.

[0051] Figure 5 This is a schematic diagram of the structure of the throttle valve and the check valve arranged in the valve body in the second embodiment of this utility model.

[0052] Figure 6 This is a schematic diagram of the structure of the throttle valve and the check valve arranged in the valve body in the third embodiment of this utility model.

[0053] 1. First control valve; 2. Second control valve; 3. Third control valve; 4. Fourth control valve; 5. Fifth control valve; 6. Sixth control valve; 7. Seventh control valve; 8. Eighth control valve; 9. Ninth control valve; 10. Tenth control valve; 101. Air spring control unit; 102. First control unit; 103. Second control unit; 104. Second air storage unit; 105. First air storage unit; 11. Compressor; 12. ECU; 13. First air storage tank; 14. Second air storage tank; 15. Dryer; 16. First check valve; 17. Throttling orifice assembly; 18. Power limiting valve; 19. Second check valve; 20. Valve body; 21. Pressure sensor; 22. Filter. Detailed Implementation

[0054] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0055] An air supply system includes an air storage unit connected to an air spring assembly; the air storage unit includes a first air storage unit and a second air storage unit; both the first and second air storage units can be used to control the air pressure in the air spring assembly; there is a pressure difference between the gas pressure in the first air storage unit and the gas pressure in the second air storage unit; by using the first and second air storage units with the pressure difference in cooperation, the adjustment speed requirements under different working conditions can be met. When the vehicle is lifted, air is supplied through two circuits of the first and second air storage units to increase the lifting speed; when the vehicle is lowered, exhaust can also be supplied to the two circuits of the first and second air storage units to increase the lowering speed, thereby improving the adjustment response speed of the air spring in the vehicle using this air supply system.

[0056] It should also be noted that the gas in the first gas storage unit and the second gas storage unit of this utility model has a gas pressure difference. The gas pressure difference can be greater than zero, equal to zero, or less than zero. The specific selection can be made according to actual requirements.

[0057] Generally, a gas pressure difference is required to be greater than zero or less than zero, but this does not mean that it cannot be used if it is equal to zero. It simply means that a gas pressure difference greater than zero or less than zero will result in better performance.

[0058] This invention utilizes a first air storage unit and a second air storage unit with different air pressures in combination, which significantly improves the response speed of the air spring when the vehicle is lifted and lowered.

[0059] The gas storage unit mainly includes a first gas storage unit and a second gas storage unit. This design not only meets functional requirements but also facilitates its placement on the vehicle, reducing costs.

[0060] Meanwhile, the first and second gas storage units can adjust the flow of gas in the gas supply system according to actual needs, improving the system's flexibility and adaptability.

[0061] In this utility model, the gas storage unit includes a first gas storage unit and a second gas storage unit; the first gas storage unit and the second gas storage unit are used to store gas, providing a basis for subsequent gas supply operations.

[0062] The air storage unit is connected to the air spring assembly; the air spring assembly is a device that uses the compressibility of gas to achieve elasticity. It is commonly used in vehicle suspension systems and other applications to adjust the suspension's height and stiffness by changing the air pressure.

[0063] Both the first and second air storage units can be used to control the air pressure in the air spring assembly; this means that the system can supply or exhaust air to the air spring assembly through the first and second air storage units, thereby regulating the internal air pressure of the air spring assembly and thus adjusting the performance of the air spring assembly.

[0064] In a vehicle's suspension system, the height of the vehicle body and the stiffness of the suspension can be adjusted by controlling the air pressure to adapt to different road conditions and driving needs.

[0065] There is a pressure difference between the gas pressure in the first gas storage unit and the gas pressure in the second gas storage unit. By maintaining a certain pressure difference, the direction and flow rate of the gas can be controlled more flexibly, thereby improving the accuracy and response speed of the system in regulating the air pressure of the air spring assembly.

[0066] In addition, the presence of the first gas storage unit and the second gas storage unit in this invention provides redundancy for the gas supply system.

[0067] If one of the gas storage units malfunctions or leaks gas, the other gas storage unit can still continue to operate, ensuring that the basic functions of the system are not affected, thus improving the system's reliability and fault tolerance.

[0068] Since both the first and second air storage units can participate in air pressure control and there is a pressure difference, the system can more flexibly adjust the air pressure of the air spring assembly; it can select appropriate methods and speeds to increase or decrease the air pressure according to different needs and operating conditions, thereby improving the system's adaptability and control accuracy.

[0069] By rationally designing the pressure difference and control strategy between the first and second gas storage units, the overall performance of the system can be further optimized.

[0070] Furthermore, in this invention, the gas pressure in the first gas storage unit is not greater than the gas pressure in the second gas storage unit; this means that the pressure in the second gas storage unit is always higher than or equal to the pressure in the first gas storage unit. This design facilitates the formation of a high-pressure zone and a low-pressure zone, making it convenient for subsequent use.

[0071] In subsequent use, when the vehicle height needs to be lowered (the air spring assembly actively charges and deflates to adjust), the air spring gas is first vented to the first air storage unit to ensure the lowering rate; when the vehicle is raised (the air spring assembly actively charges and deflates to adjust), the gas in the second air storage tank is first vented to the air spring assembly spring to ensure the lifting rate.

[0072] In addition, in this invention, the gas pressure in the first air storage unit is less than the minimum air pressure in the air spring of the air spring assembly; the gas pressure in the second air storage unit is greater than the maximum air pressure in the air spring of the air spring assembly; and the gas pressure in the first air storage unit is less than the minimum air pressure in the air spring of the air spring assembly. This arrangement facilitates the release of gas into the first air storage unit when the air spring assembly is actively depressurized, thereby ensuring the vehicle height reduction rate.

[0073] The gas pressure in the second air storage unit is greater than the maximum gas pressure in the air spring of the air spring assembly. This indicates that the pressure in the second air storage unit is high enough to provide sufficient gas to the air spring to maintain its normal operating pressure. When the air spring assembly needs to be inflated for adjustment, the gas in the second air storage unit can be supplied into the air spring assembly. This setting ensures the vehicle's lifting rate.

[0074] Based on the above design, the first air storage unit can be used for the exhaust collection of the air spring assembly, while the second air storage unit can be used for the rapid inflation of the air spring assembly. The two work together to achieve more flexible and precise air pressure regulation, meeting the needs of the air spring assembly under different operating conditions.

[0075] Furthermore, the gas supply system described in this utility model also includes a communication control unit, through which the first gas storage unit and the second gas storage unit are connected. The communication control unit 106 is mainly used for communication between the first gas storage unit 105 and the second gas storage unit 104, to facilitate maintaining the pressure difference between the first gas storage unit 105 and the second gas storage unit 104. The communication control unit can be set to extract gas from the first gas storage unit to the second gas storage unit at a specific time. The first gas storage unit and the second gas storage unit are connected to maintain the pressure difference between them. When a lift or lowering operation is completed, the pressure difference between the low-pressure and high-pressure air tanks will change. At this time, the pressure difference range is set according to the vehicle speed. If the pressure difference is lower than the lower limit, the fifth solenoid valve is opened, the compressor works, and the seventh and eighth solenoid valves are opened, allowing gas from the first air tank to fill the second air tank. At the same time, the detection unit can detect the gas pressure difference between the first and second air tanks. If the pressure difference is higher than the upper limit, the fifth, sixth, and ninth solenoid valves are opened and held for Ts to exhaust gas from the high-pressure air tank into the low-pressure air tank, reducing the pressure difference.

[0076] Ts is obtained through calibration.

[0077] "Ts" is a time parameter used to represent the duration of an operation or state.

[0078] In this utility model, the air supply system mainly includes a gas supply unit and an air storage unit; the gas supply unit is connected to the air storage unit; the air storage unit includes a first air storage unit 105 and a second air storage unit 104; the air supply system disclosed in this utility model, through the cooperative use of the first air storage unit 105 and the second air storage unit 104 with a pressure difference, can meet the speed adjustment requirements under different working conditions. When the vehicle is lifted, air is supplied by the two circuits of the first air storage unit 105 and the second air storage unit 104 to increase the lifting speed. When the vehicle is lowered, exhaust can also be supplied to the two circuits of the first air storage unit 105 and the second air storage unit 104 to increase the lowering speed, thereby improving the adjustment response speed of the air spring in the vehicle using this air supply system.

[0079] The gas supply unit described in this utility model includes a valve body 20 and an ECU 12; the valve body 20 is equipped with a gas pressure control unit; the gas supply unit is mainly used to control the gas in the corresponding air spring during subsequent use, so as to realize the use control of the air spring, and also to facilitate the subsequent height control of the vehicle using the gas supply system.

[0080] In addition, the gas used in the gas supply system of this utility model can be air, nitrogen, argon, or other gas structures, and can be selected and used according to needs.

[0081] The gas supply unit described in this utility model includes a valve body 20; the valve body 20 is the main external support structure and is hollow inside, which facilitates the arrangement and placement of the air pressure control unit; in addition, the valve body 20 is connected to an ECU 12 in this utility model; the ECU 12 facilitates the control of the air pressure control unit; the air pressure control unit is provided inside the valve body 20; the setting of the air pressure control unit facilitates the control of the flow direction of gas in the gas supply system.

[0082] The air pressure control unit described in this utility model includes an air supply unit and an air spring control unit 101. The air supply unit is connected to the air spring control unit 101 via a connecting control unit. The air supply unit facilitates subsequent control of gas entering and exiting the air spring control unit 101. The air spring control unit 101 is mainly used to connect to the air spring assembly, ultimately realizing subsequent control operations on the corresponding air spring. At the same time, the air supply unit can also perform subsequent inflation operations on the air storage unit to ensure the air pressure in the air storage unit. Furthermore, the air supply unit can also control the gas flow in the first air storage unit 105 and the second air storage unit 104 to ensure the gas pressure difference between the first air storage unit 105 and the second air storage unit 104.

[0083] Furthermore, in this invention, the air supply unit is connected to the air spring control unit 101 via a connection control unit. The connection control unit primarily serves as a connector and interconnector, facilitating the formation of a closed loop in the entire air supply system. The connection control unit includes a first control unit 102 and a second control unit 103. The air inlet of the air supply unit is connected to the air spring control unit 101 via the first control unit 102, and the air outlet of the air supply unit is connected to the air spring control unit 101 via the second control unit 103. In this invention, the air supply unit, the first control unit 102, the second control unit 103, and the air spring control unit 101 form a circular closed loop. When used in conjunction with the air storage unit, this can constitute a dual-loop closed-loop air supply system. This configuration facilitates the air supply operation of the air supply unit and also facilitates the dual-loop control of the air spring control unit 101's air inlet and outlet, thereby improving the air spring's response speed.

[0084] In addition, in this utility model, the first air storage unit 105 is connected to the first control unit 102; the second air storage unit 104 is connected to the second control unit 103; the first air storage unit 105 and the second air storage unit 104 are equivalent to a branch structure, which facilitates the air intake and exhaust operation of the air spring control unit 101 during subsequent use.

[0085] Meanwhile, in order to improve the response speed of the air spring in rising and falling, there is a gas pressure difference between the gas in the first gas storage unit 105 and the gas in the second gas storage unit 104 in this utility model; the specific gas pressure difference is selected according to the actual working conditions.

[0086] In this invention, the first gas storage unit 105 is a low-pressure area and the second gas storage unit 104 is a high-pressure area. The gas pressure in the first gas storage unit 105 is relatively low. When the air spring needs to exhaust gas, the exhaust gas can be stored in the first gas storage unit 105, thereby ensuring the exhaust efficiency of the air spring and thus ensuring the descent efficiency of the air spring. The gas pressure in the second gas storage unit 104 is relatively high, thereby ensuring the intake efficiency of the air spring and thus ensuring the rise efficiency of the air spring.

[0087] In addition, in order to control the direction of the gas, both the first control unit 102 and the second control unit 103 are provided with at least one control valve. The number of control valves can be selected as needed, as long as the gas can flow stably in the gas supply system and the gas can be controlled to flow accordingly in the gas supply system as needed.

[0088] Meanwhile, the air pressure control unit in this utility model is connected to an air storage unit; the air storage unit includes a first air storage unit 105 and a second air storage unit 104; the first air storage unit 105 and the second air storage unit 104 are connected to the air spring control unit 101; in actual design, other air storage units can also be set, such as a third air storage unit or a fourth air storage unit, and the actual design quantity can be selected according to the needs; making it more convenient to use in actual production.

[0089] In practical use, for the sake of cost and convenience of subsequent layout on the vehicle, the actual design of the gas storage unit generally includes a first gas storage unit 105 and a second gas storage unit 104.

[0090] In practical use, the first air storage unit 105 and the second air storage unit 104 can be selected as needed. The main purpose of setting the first air storage unit 105 and the second air storage unit 104 in this utility model is to form a dual circuit in the air supply system, which facilitates the air spring's air intake and exhaust operations and improves the air spring's response efficiency.

[0091] In this invention, the first air storage unit 105 and the second air storage unit 104 are connected to the air spring control unit 101. Through the arrangement of the first air storage unit 105 and the second air storage unit 104, this invention can supply air to the air spring during subsequent use and also collect the exhaust gas from the air spring. When air needs to be supplied to the air spring control unit 101, the gas stored in the air storage unit disclosed in this invention can quickly supply air to the air spring control unit 101. When the vehicle body needs to lower or the air spring assembly needs to exhaust gas, the exhaust gas from the air spring assembly can be stored in the air storage unit through the air spring control unit 101.

[0092] In this utility model, the first air storage unit 105 is connected to the first control unit 102; specifically, the first air storage unit 105 is connected to the air spring control unit 101 through the first control unit 102; the second air storage unit 104 is connected to the second control unit 103; the second control unit 103 can be directly connected to the air spring control unit 101, or it can be connected to the air spring control unit 101 through the first control unit 102.

[0093] In this utility model, the first control unit 102 includes a first connecting pipe a2; the second control unit 103 includes a second connecting pipe a3.

[0094] Specifically, in this utility model, the first gas storage unit 105 includes a first gas storage tank 13. The first gas storage tank 13 has two main functions: one is to store gas, and the other is to supply gas to the air spring assembly. In this utility model, the first gas storage tank 13 is connected to the air spring control unit 101 through a first control unit 102. This arrangement facilitates the cooperation between the first gas storage tank 13 and the air spring control unit 101. The first control unit 102 is equipped with a sixth control valve 6. The sixth control valve 6 is mainly used to control the opening and closing of the first connecting pipe a2. This allows for changing the gas flow direction as needed during subsequent use, enabling the storage and discharge of gas in the first gas storage tank 13.

[0095] In addition, the gas storage unit in this utility model also includes a second gas storage unit 104; the second gas storage unit 104 is connected to the second control unit 103; the second control unit 103 can be directly connected to the air spring control unit 101, or it can be connected to the air spring control unit 101 through the first control unit 102; the utility model increases the response speed of the air pressure control unit to the air spring assembly by setting the second gas storage unit 104; the second gas storage unit 104 in this utility model includes a second gas storage tank 14, the second gas storage tank 14 is connected to the first connecting pipe a2 or the air spring control unit 101 through the second connecting pipe a3; the second connecting pipe a3 is provided with a seventh control valve 7; the utility model facilitates the connection between the second gas storage tank 14 and the corresponding components by setting the second connecting pipe a3, and the seventh control valve 7 is mainly used to control the opening and closing of the second connecting pipe a3, so as to facilitate the control of the gas discharge in the second gas storage tank 14 and the control of the external gas entering the second gas storage tank 14.

[0096] Meanwhile, in this utility model, the gas storage unit can also be equipped with other gas storage units, such as a third gas storage unit or a fourth gas storage unit, and the actual design quantity can be selected according to the needs; the purpose of this design is mainly to enable the gas supply system of this utility model to be compatible with single gas storage units, dual gas storage units, or even more gas storage connection methods; making it more convenient to use in actual production.

[0097] For cost reasons and to facilitate subsequent installation on the vehicle, the actual design typically includes a first air storage unit 105 and a second air storage unit 104.

[0098] In actual use, the settings of the first gas storage unit 105 and the second gas storage unit 104 can be selected as needed.

[0099] In this invention, the air pressure in the second air tank 14 is required to be greater than the air pressure in the first air tank 13. The gas in the first air tank 13 can be transferred to the second air tank 14, so that the first air tank 14 is kept in a low-pressure state for a long time, thereby achieving the response speed when the vehicle body descends.

[0100] Of course, the first gas storage unit 105 and the second gas storage unit 104 of this utility model can be used in conjunction with each other. This allows the gas storage unit to have the technical effects of both the first gas storage unit 105 and the second gas storage unit 104. The flow control of gas in the gas supply system can be changed as needed, making it convenient to use in actual production.

[0101] In this invention, the gas pressure in the first gas storage unit 105 is lower than the gas pressure in the second gas storage unit 104; the gas pressure in the first gas storage unit 105 is lower than the minimum gas pressure in the air spring connected to the air spring control unit 101; the gas pressure in the second gas storage unit 104 is greater than the maximum gas pressure in the air spring connected to the air spring control unit 101; in this invention, the first gas storage unit 105 is a low-pressure area and the second gas storage unit 104 is a high-pressure area. The gas pressure in the first gas storage unit 105 is relatively low, so when the air spring needs to exhaust gas, the exhaust gas can be stored in the first gas storage unit 105, thereby ensuring the exhaust efficiency of the air spring and thus ensuring the descent efficiency of the air spring. The gas pressure in the second gas storage unit 104 is relatively high, thereby ensuring the intake efficiency of the air spring and thus ensuring the rise efficiency of the air spring.

[0102] Furthermore, in this invention, the gas supply unit is connected to the second control unit 103 through the drying unit; in this invention, the drying unit can be directly connected to the second control unit 103, or it can be bridged through the pipeline unit. In this invention, the gas supply unit and the drying unit are connected in series, which facilitates the drying of subsequent gas entering the air spring.

[0103] Furthermore, in this invention, the gas supply unit is connected to the drying unit via a pipeline unit. This arrangement facilitates the connection between the gas supply unit and the drying unit. In this invention, the pipeline unit includes an external pipeline a5. The drying unit is connected to both the gas supply unit and the second control unit 103 via the external pipeline a5. The drying unit of the gas supply system disclosed in this invention is independently set up from the gas supply unit, and the two are connected via the external pipeline a5. This arrangement facilitates subsequent replacement of the drying unit. Simultaneously, the external drying unit allows for independent arrangement. By controlling the length and arrangement of the external pipeline a5, the position of the drying unit can be changed as needed during actual use, optimizing the spatial arrangement of the entire gas supply system and reducing interference between the gas supply system and adjacent components.

[0104] In this utility model, the air supply unit is connected to the air spring control unit 101 through the drying unit; the air supply unit is generally connected to the second control unit 103 through the drying unit, and then connected to the air spring control unit 101 through the second control unit 103; based on this arrangement, it is convenient for the air supply unit to control the air spring control unit 101.

[0105] In this utility model, the gas supply unit is required to be connected to the air spring control unit 101 through the drying unit; the pipeline unit includes an external pipeline a5; the drying unit is connected to the gas supply unit and the air spring control unit 101 through the external pipeline a5 respectively; the setting of the drying unit enables the gas supplied by the gas supply unit to be dried before entering the corresponding air spring control unit 101; ultimately ensuring the dryness of the gas entering the air spring assembly.

[0106] In addition, the drying unit ensures the dryness of the air in the air supply system.

[0107] Furthermore, the air supply unit described in this utility model includes a compressor; the compressor is connected to a drive motor and includes one or more air compression pumps; in this utility model, the air inlet end of the compressor is connected to a first control unit 102, and the air outlet end is connected to a second control unit 103. In actual use, the air outlet end of the compressor is connected to the second control unit 103 through a drying unit. The compressor is mainly used for the flow of gas in the air supply system and also facilitates the air spring's air intake and exhaust operations.

[0108] The drying unit described in this utility model includes a dryer 15; the dryer 15 is mainly used to dry the passing gas.

[0109] In this utility model, the first gas storage unit 105 includes a first gas storage tank 13, which is connected to the first control unit 102; the second gas storage unit 104 includes a second gas storage tank 14, which is connected to the second control unit 103; both the first gas storage tank 13 and the second gas storage tank 14 are used for gas storage, which facilitates the rapid intake and exhaust of the air spring.

[0110] Meanwhile, the drying unit described in this utility model includes a dryer 15, a throttle valve, and a check valve. The arrangement of the throttle valve and the check valve can be selected as needed. They can be arranged inside the valve body or outside the valve body. The specific arrangement can be set according to the needs. Please refer to the attached drawings for details. The dryer 15 is set to dry the gas passing through it, reduce the water content in the gas, and prevent the water in the gas from affecting the service life of the air spring.

[0111] In addition, the pipeline unit described in this utility model includes an external pipeline a5; the external pipeline a5 serves as a good bridge, facilitating the connection between the dryer 15 and the corresponding components. Specifically, in this utility model, the dryer 15 is connected to the air supply unit and the second control unit 103 respectively through the external pipeline a5; the dryer 15 is connected to the compressor in the air supply unit through one external pipeline a5, and the dryer 15 is connected to the second control unit 103 through another external pipeline a5; based on this arrangement, the air supply unit, the drying unit, and the air spring control unit 101 form a loop, facilitating the subsequent air supply or exhaust operation of the air spring assembly, thereby enabling the normal use of the air spring assembly.

[0112] Meanwhile, in this utility model, the first gas storage unit 105 includes a first gas storage tank 13, which is connected to the first control unit 102; specifically, the first gas storage tank 13 is connected to the first control unit 102 through a first gas storage external pipe a5; the second gas storage unit 104 includes a second gas storage tank 14, which is connected to the second control unit 103; specifically, the second gas storage tank 14 is connected to the second control unit 103 through a second gas storage external pipe a4. Based on this design, the connection between the first gas storage tank 13 and the second gas storage tank 14 and adjacent components is facilitated.

[0113] Furthermore, in this invention, the air pressure in the first air storage unit 105 is lower than the air pressure in the second air storage unit 104. Based on this design, the first air storage tank 14 is kept in a low-pressure state for a long time, which facilitates the rapid movement of gas from the air spring assembly to the first air storage tank 13, thereby improving the response speed when the vehicle body descends. At the same time, the gas in the first air storage unit 105 can be transferred to the second air storage unit 104 through the air supply unit, which better ensures the air pressure in the second air storage unit 104 and reduces the air pressure in the first air storage unit 105, thus maintaining the pressure difference between the first air storage unit 105 and the second air storage unit 104.

[0114] Furthermore, in this utility model, the air supply unit is connected to an air replenishment unit at its air inlet end; the air replenishment unit includes an air replenishment pipe, and a filter 22 is connected to the end of the air replenishment pipe away from the air supply unit; a one-way valve is provided on the air replenishment pipe; an exhaust unit is connected to the air outlet end of the air supply unit, and the exhaust unit includes an exhaust pipe, and a tenth control valve 10 is provided on the exhaust pipe; this utility model, based on the combined use of the air replenishment unit and the exhaust unit, facilitates the control of the gas pressure inside the air supply system.

[0115] In this invention, the gas supply pipe can be directly connected to the atmosphere; this setting facilitates the supply of gas to the compressor during subsequent use; thereby enabling the supply of gas to the entire gas supply system or the gas pressure control unit; the exhaust pipe is also directly connected to the atmosphere, which facilitates the decompression operation of the exhaust gas when the gas supply system pressure is too high.

[0116] Furthermore, in this invention, the second control unit 103 is connected to the first control unit 102, and the second control unit 103 is connected to the cavity spring control unit through the first control unit 102. Based on this arrangement, the first control unit 102 and the second control unit 103 can be directly connected, that is, the gas supply unit, the first control unit 102, and the second control unit 103 form a ring-shaped passage, which facilitates the movement of gas within the ring-shaped passage. At the same time, based on this connection, it is convenient to realize the pressure in the first gas storage unit 105 and the second gas storage unit 104 through a single detection unit, reducing the use of detection units. Meanwhile, the first control unit 102 and the second control unit 103 are connected, which facilitates the reciprocating flow of gas in the first gas storage unit 105 and the second gas storage unit 104.

[0117] Furthermore, the connection control unit in this utility model also includes a communication control unit 106, through which the first gas storage unit 105 and the second gas storage unit 104 are connected. The communication control unit 106 is mainly used for communication between the first gas storage unit 105 and the second gas storage unit 104, so as to ensure the pressure difference between the first gas storage unit 105 and the second gas storage unit 104. In this utility model, the communication control unit 106 is provided with a communication pipe a8, and a ninth control valve 9 is provided on the communication pipe a8. The ninth control valve 9 is used to control the opening and closing of the communication pipe a8, and the communication pipe a8 is used for the movement of gas in the second gas storage unit 104 into the first gas storage unit 105.

[0118] Furthermore, the air pressure control unit in this invention also includes a detection unit connected to the first control unit 102; the detection unit includes a pressure sensor 21 disposed on the first control unit 102; the pressure sensor 21 of this invention is mainly used to detect the pressure in the first air storage unit 105 and the second air storage unit 104; to facilitate the identification of the pressure difference between the first air storage unit 105 and the second air storage unit 104; and thus to facilitate the control of the pressure difference between the first air storage unit 105 and the second air storage unit 104 during subsequent use.

[0119] An air spring system for vehicles includes an air spring assembly comprising multiple air springs; the air spring assembly is connected to an air supply system; the air spring system disclosed in this utility model improves the adjustment response speed of the air supply system to vehicle descent by setting up the air supply system and adopting a dual air tank strategy; at the same time, in actual design, the air supply system disclosed in this utility model can be equipped with different numbers of control valves as needed; that is, a suitable air supply system can be selected according to needs; thus increasing the applicability of this utility model and avoiding the problem of excessive cost of using a single type of air supply system for different vehicle models.

[0120] In addition, in actual design, the air spring control unit 101 disclosed above includes a spring main pipe a7, and the air spring control unit 101 includes a plurality of individual spring control units connected to the spring main pipe a7; each individual spring control unit includes a branch pipe a1 connected to the spring main pipe a7, and a branch control valve is provided on the branch pipe a1.

[0121] In actual installation, four individual spring control units are generally set up, mainly to work with four air springs; one individual spring control unit corresponds to one air spring; the branch control valves on the four individual spring control units are mainly referred to as first control valve 1, second control valve 2, third control valve 3, and fourth control valve 4 due to their different settings; at the same time, the air springs are referred to as first air spring 23, second air spring 24, third air spring 25, and fourth air spring 26 due to their different settings; please refer to the appendix for details. Figure 1 As shown.

[0122] In practical implementation, the air spring system disclosed in this utility model can be configured with eight, nine, or ten valve bodies. The aforementioned eight, nine, and ten valve bodies mainly refer to the number of control valves installed in the air spring system; the specific number can be selected according to needs.

[0123] The specific implementation plan is as follows:

[0124] The air supply system disclosed in this utility model is mainly used in the air spring system of motor vehicles. The air supply system disclosed in this utility model includes a gas supply unit and a gas storage unit. The gas supply unit is connected to the drying unit through a pipeline unit. The drying unit includes a dryer 15. The gas supply unit mainly includes a valve body 20, an ECU 12 controller, and a pressure control unit. The pressure control unit includes an air supply unit, an air spring control unit 101, a detection unit, a first control unit 102, and a second control unit 103, etc.

[0125] In this utility model, the gas storage unit includes a first gas storage unit 105 and a second gas storage unit 104. The first gas storage unit 105 is connected to the first control unit 102, and the second gas storage unit 104 is connected to the second control unit 103. Based on this configuration, in actual use, the gas in the air spring assembly can flow to both gas storage units simultaneously or to one of the gas storage units. The two gas storage units can be independent or integrated together but divided into two cavities.

[0126] In this utility model, the gas supply unit includes a compressor, or an air compressor pump, etc., which mainly supplies gas to the entire air pressure control unit and controls the flow direction of the gas. In actual use, the air compressor pump or compressor is arranged in the valve body 20 and driven by the eccentric shaft at the output end of the brushed motor or brushless motor. The number of gas pumps can be greater than or equal to one.

[0127] In addition, the ECU12 controller of this utility model is required to be connected to the vehicle power supply, communication network, sensors, control switches, etc. via connectors; at the same time, the ECU12 controller of this utility model can integrate the control function of the electronically controlled shock absorber and be connected to at least one vehicle electronically controlled shock absorber via connectors.

[0128] When the air supply system disclosed in this utility model is used in a vehicle, it forms a vehicle air spring system. The air spring system disclosed in this utility model can adjust the overall height of the vehicle, adjust the height of a certain axle of the vehicle, or adjust the height of the air spring on a certain side of the vehicle.

[0129] In addition, the control valves disclosed above and below can be designed using a solenoid valve structure; specifically, they can be two-position two-way solenoid valves.

[0130] In this utility model, what is essentially disclosed is a dual-loop closed-loop gas supply system, which mainly includes a compressor, a drying unit, a valve body 20, an ECU 12, a dryer 15, a first gas storage tank 13, a second gas storage tank 14, and several connection control units. Here, the connection control units are essentially connection pipes, connection pipelines, or connection air passages.

[0131] In this utility model, the first gas storage tank 13 is a low-pressure gas storage tank, and the second gas storage tank 14 is a high-pressure gas storage tank.

[0132] The compressor, valve body 20, and ECU12 are integrated into a single unit.

[0133] The valve body 20 is provided with a control valve and a connection control unit. The control valve is a solenoid valve, and the connection control unit can be an air passage arranged on the valve body 20; of course, it can be some pipeline structure.

[0134] The number of control valves can be arranged as needed.

[0135] Example 1:

[0136] The present invention discloses a dual-loop closed-loop gas supply system, which mainly includes a compressor, a drying unit, a valve body 20, an ECU 12, a dryer 15, a first gas storage tank 13, a second gas storage tank 14, and several connection control units. These connection control units are essentially connecting pipes, connecting pipelines, or connecting gas passages.

[0137] In this utility model, the first gas storage tank 13 is a first gas storage tank 13, and the second gas storage tank 14 is a high-pressure gas storage tank 14.

[0138] The compressor, valve body 20, and ECU12 are integrated into a single unit.

[0139] The valve body 20 is equipped with a control valve and a connected control unit.

[0140] The gas supply system includes ten control valves, namely, first control valve 1, second control valve 2, third control valve 3, fourth control valve 4, fifth control valve 5, sixth control valve 6, seventh control valve 7, eighth control valve 8, ninth control valve 9 and tenth control valve 10; the control unit is connected to the compressor, the first to tenth control valves, the dryer 15, the first gas storage tank 13 and the high-pressure gas storage tank 14.

[0141] The first control valve 1, the second control valve 2, the third control valve 3, and the fourth control valve 4 are each connected to an air spring through four branch pipes a1. The number of air springs may not be four. For example, some models only have two air springs on the rear axle, in which case only the first and second control valves are connected to two air springs.

[0142] In this utility model, the air spring control unit 101 includes a main spring pipe a7, and the air spring control unit 101 also includes a plurality of individual spring control units connected to the main spring pipe a7; each individual spring control unit includes a branch pipe a1 connected to the main spring pipe a7, and a branch control valve is provided on the branch pipe a1.

[0143] In actual installation, four individual spring control units are generally set up, mainly to cooperate with four air springs; one individual spring control unit corresponds to one air spring; the branch control valves on the four individual spring control units are mainly called first control valve 1, second control valve 2, third control valve 3 and fourth control valve 4 due to their different settings; at the same time, the air springs are divided into first air spring 23, second air spring 24, third air spring 25 and fourth air spring 26 due to their different settings; please refer to the attached diagram for details.

[0144] The first control unit 102 is connected to the spring main pipe a7; the first control unit 102 is essentially the first connecting pipe a2; the second control unit 103 is essentially the second connecting pipe a3, and a detection unit is provided at the end of the first connecting pipe a2 near the spring main pipe a7; the detection unit is mainly a pressure sensor 21 connected to the first control unit 102.

[0145] In this utility model, the fifth control valve is connected to the first gas storage external pipe a5. The fifth control valve 5 is used to control the opening and closing of the first gas storage external pipe a5. The sixth control valve is connected to the first connecting pipe a2. The sixth control valve is also essentially used to control the opening and closing of the first connecting pipe a2, but its position is between the connection between the first gas storage external pipe a5 and the first connecting pipe a2 and the spring main pipe a7.

[0146] The seventh control valve is mainly connected to the second connecting pipe a3 and is used to control the on / off state of the second connecting pipe a3.

[0147] In this utility model, the eighth control valve is connected to the second gas storage external pipeline a4; it controls the opening and closing of the second gas storage external pipeline a4.

[0148] In this utility model, the ninth control valve is connected to the communication control unit 106; the communication control unit 106 is a communication control pipeline, and the ninth control valve is installed in the communication control pipeline to realize the on-off control of the communication control pipeline.

[0149] In this utility model, the dryer 15 is located outside the valve body 20, and the dryer 15 is connected to the air supply unit and the second control unit 103 through the external pipe a5.

[0150] The compressor inlet is connected to the first connecting pipe a2, and the outlet is connected to the second connecting pipe a3 or to an external connecting pipe a5.

[0151] A first check valve 16 and a throttling orifice assembly 17 are provided on the external pipe a5 near the second connecting pipe a3 of the dryer 15. The first check valve 16 allows gas to flow from the compressor to the seventh control valve and the eighth control valve.

[0152] The first one-way valve 16 is connected in parallel with the throttling orifice.

[0153] In this invention, the tenth control valve is connected to the exhaust pipe; it is used to control the opening and closing of the exhaust pipe to facilitate subsequent exhaust into the atmosphere.

[0154] In addition, in this utility model, a second one-way valve 19 is provided on the air supply pipeline. The second one-way valve 19 is connected to the filter 22, and the filter 22 is connected to the atmosphere. The second one-way valve 19 allows the compressor to draw air from the atmosphere; the filter 22 can remove impurities in the air.

[0155] In this utility model, the compressor is provided with parallel pipes a7 at both ends, and a power limiting valve 18 is provided on the parallel pipes a7. When the compressor outlet pressure is too high, the power limiting valve 18 can open the parallel pipes a7, connecting the first connecting pipe a2 with the external connecting pipe a5, so that the compressor inlet and outlet pressures are the same, thus protecting the compressor.

[0156] The ECU12 can control the opening and closing of the control valve and whether the compressor works. It can receive the signal from the pressure sensor 21 and output the pressure value.

[0157] The control valve is a normally closed valve.

[0158] At the design height of the air spring, the air pressure in the first air tank 13 is lower than the minimum air pressure of the air spring; the air pressure in the high-pressure air tank 14 is higher than the maximum air pressure of the air spring.

[0159] In this invention, the exhaust pipe is connected to the external pipe a5 between the compressor and the dryer 15; the first external gas storage pipe a5 is connected to the first connecting pipe a2 between the compressor and the sixth control valve; the replenishment pipe is connected to the first connecting pipe a2 between the compressor and the first external gas storage pipe a5; the sixth control valve is connected to the first connecting pipe a2 and is located in the area between the first external gas storage pipe a5 and the connection point of the second connecting pipe a3 and the first connecting pipe a2; the detection unit is located in the area between the connection point of the second connecting pipe a3 and the first connecting pipe a2 and the air spring control unit 101.

[0160] The eighth control valve is installed on the second gas storage external pipe a4 and is located in the area between the second connecting pipe a3 and the connection between the connecting control unit 106 and the second gas storage external pipe a4.

[0161] One end of the connection control unit 106 is connected to the second gas storage external pipe a4, and the other end is connected to the first connection pipe a2 and the first gas storage external pipe a5.

[0162] The seventh control valve is installed on the second connecting pipe a3, located in the area between the connection between the second external gas storage pipe a4 and the second connecting pipe a3 and the connection between the second connecting pipe a3 and the first connecting pipe a2.

[0163] Gas supply method:

[0164] When the air spring needs to be inflated, open the seventh and eighth control valves, and simultaneously open one or more of the following control valves: first control valve 1, second control valve 2, third control valve 3, and fourth control valve 4.

[0165] The gas in the high-pressure gas storage tank 14 is connected to the second control unit 103 and the first control unit 102 through the second gas storage external pipe a4 and then inflated into the air spring.

[0166] When inflating the air spring, optionally, in addition to the above, the fifth control valve is opened at the same time, the compressor works, and the air pressure in the first air tank 13 is compressed by the compressor and then simultaneously inflated into the air spring through the first external air storage pipe a5, the first control unit 102, the second control unit 103 and the first control unit 102.

[0167] Based on the above, there are two circuits for supplying air to the air spring: the high-pressure air tank 14 and the first air tank 13. By reasonably setting the initial pressure of the first air tank 13 and the high-pressure air tank 14, the inflation speed can be accelerated, that is, the vehicle lifting speed can be accelerated.

[0168] During the process of inflating the air spring, the pressure of the high-pressure air tank 14 continuously decreases, while the air pressure of the air spring increases. When the pressure of the high-pressure air tank 14 approaches the air pressure of the air spring, the lifting speed will slow down.

[0169] At this time, the following procedure is followed: by detecting changes in lifting speed or pressure changes in the high-pressure gas tank, the working condition is identified in advance. When the working condition is entered, the fifth control valve and the eighth control valve are closed, and the ninth control valve is opened. At this time, the pressure of the high-pressure gas tank 14 enters the compressor inlet through the second external gas storage pipe a4, the connecting control unit 106, and the first control unit 102. After being compressed by the compressor, the gas enters the air spring through the external pipe a5, the dryer 15, the second control unit 103, and the first control unit 102.

[0170] When the air spring needs to be vented, one or more of the first control valve 1, the second control valve 2, the third control valve 3, and the fourth control valve 4 are opened, and the fifth control valve and the sixth control valve are opened. The gas in the air spring is vented to the first air storage tank 13 through the first control unit 102 and the first external air storage pipe a5.

[0171] When the air spring needs to be vented, optionally, in addition to the above, the compressor works at the same time, the eighth control valve is opened, the air spring gas passes through the first control unit 102, is compressed by the compressor, and is vented to the high-pressure air tank 14 through the external pipe a5, dryer 15, second control unit 103 and second external air storage pipe a4.

[0172] There are two circuits for exhausting air to the air spring: the first air storage tank 13 and the high-pressure air storage tank 14.

[0173] By properly setting the initial pressure of the first air tank 13 and the high-pressure air tank 14, the exhaust speed can be accelerated, that is, the speed at which the vehicle height is reduced can be accelerated.

[0174] When a lift-down or lower-lift cycle is completed, the pressure difference between the first air tank 13 and the high-pressure air tank 14 will change. At this time, the pressure difference range is set according to the vehicle speed. If the pressure difference is lower than the lower limit, the fifth control valve is opened, the compressor works, the seventh control valve and the eighth control valve are opened, and the gas in the first air tank 13 is filled into the high-pressure air tank 14 through the first external air storage pipe a5, the external pipe a5, the dryer 15, the second control unit 103 and the second external air storage pipe a4. At the same time, the gas reaches the pressure sensor 21 through the first pipe. The pressure sensor 21 can monitor the air pressure. When the pressure reaches a certain range, the operation stops.

[0175] If the pressure difference is higher than the upper limit, open the fifth control valve, the sixth control valve, and the ninth control valve for a period of Ts to exhaust the gas in the high-pressure gas storage tank 14 into the first gas storage tank 13 and reduce the pressure difference.

[0176] Ts is obtained through calibration.

[0177] The vehicle load condition is calculated from the air spring pressure.

[0178] When it is necessary to detect the pressure of the first gas tank 13, the fifth control valve and the sixth control valve are opened. The gas in the first gas tank 13 flows to the pressure sensor 21 through the first gas storage external pipe a5 and the first connecting pipe a2. The pressure sensor 21 outputs a pressure signal to the ECU 12.

[0179] When it is necessary to detect the pressure of the high-pressure gas tank 14, the seventh control valve and the eighth control valve are opened. The gas in the high-pressure gas tank 14 flows to the pressure sensor 21 through the second gas storage external pipe a4, the second connecting pipe a3, and the first connecting pipe a2. The pressure sensor 21 outputs a pressure signal to the ECU 12.

[0180] Example 2:

[0181] In this implementation case, the eighth and ninth control valves in the first case are eliminated, meaning there are only 8 control valves.

[0182] This implementation case is applicable to vehicles with low air spring pressure, which ensures that the pressure of the high-pressure air tank 14 is always higher than the air spring pressure.

[0183] In this implementation, the connection control unit 106 is removed; everything else is the same as in the first implementation. Based on the second implementation, the corresponding second gas supply method is as follows:

[0184] When the air spring needs to be inflated, open the seventh control valve, and simultaneously open one or more of the following control valves: first control valve 1, second control valve 2, third control valve 3, and fourth control valve 4.

[0185] The gas in the high-pressure gas storage tank 14 is delivered to the air spring via the second external gas storage pipe a4, the second connecting pipe a3, and the first connecting pipe a2.

[0186] When inflating the air spring, optionally, in addition to the above, the fifth control valve can be opened simultaneously, the compressor will work, and the air pressure in the first air tank 13 will be compressed by the compressor and then simultaneously inflated into the air spring through the first connecting pipe a2, the compressor, the external connecting pipe a5, the dryer 15, the second connecting pipe a3, and the first connecting pipe a2. That is, there are two circuits supplying air to the air spring: one for inflating the high-pressure air tank 14 and the other for inflating the first air tank 13. By reasonably setting the initial pressure of the first air tank 13 and the high-pressure air tank 14, the inflation speed can be accelerated, that is, the vehicle lifting speed can be accelerated.

[0187] When the air spring needs to be vented, one or more of the first control valve 1, the second control valve 2, the third control valve 3, and the fourth control valve 4 are opened, and the fifth control valve and the sixth control valve are opened. The gas in the air spring is vented to the first air storage tank 13 through the first connecting pipe a2 and the first external air storage pipe a5.

[0188] When the air spring needs to be vented, optionally, in addition to the above, the compressor works at the same time. The air spring gas enters the compressor through the first connecting pipe a2, is compressed by the compressor, and is vented to the high-pressure air tank 14 through the external pipe a5, dryer 15, second connecting pipe a3 and second external air storage pipe a4.

[0189] There are two circuits for exhausting air to the air spring: the first air storage tank 13 and the high-pressure air storage tank 14.

[0190] By properly setting the initial pressure of the first air tank 13 and the high-pressure air tank 14, the exhaust speed can be accelerated, that is, the speed at which the vehicle height is reduced can be accelerated.

[0191] When a lift-down or lower-lift cycle is completed, the pressure difference between the first air tank 13 and the high-pressure air tank 14 will change. At this time, the pressure difference range is set according to the vehicle speed. If the pressure difference is lower than the lower limit, the fifth control valve is opened, the compressor works, and the seventh control valve is opened. The gas in the first air tank 13 is filled into the high-pressure air tank 14 through the first external air storage pipe a5, the external pipe a5, the dryer 15, the second control unit 103, and the second external air storage pipe a4. At the same time, the gas reaches the pressure sensor 21 through the second connecting pipe a3 and the first connecting pipe a2. The pressure sensor 21 can monitor the air pressure. When the pressure reaches a certain range, the operation stops.

[0192] If the pressure difference exceeds the upper limit, the fifth, sixth, and seventh control valves are opened continuously for Ts to exhaust the gas in the high-pressure gas storage tank 14 into the first gas storage tank 13, thereby reducing the pressure difference. Ts is obtained through calibration.

[0193] When it is necessary to detect the pressure of the first gas tank 13, the fifth control valve and the sixth control valve are opened. The gas in the first gas tank 13 flows to the pressure sensor 21 through the first gas storage external pipe a5 and the first connecting pipe a2. The pressure sensor 21 outputs a pressure signal to the ECU 12.

[0194] When it is necessary to detect the pressure of the high-pressure gas tank 14, the seventh control valve is opened, and the gas in the high-pressure gas tank 14 flows to the pressure sensor 21 through the second gas storage external pipe a4, the second connecting pipe a3 and the first connecting pipe a2. The pressure sensor 21 outputs a pressure signal to the ECU 12.

[0195] Example 3:

[0196] In this case, the position of the fifth control valve in the second case is changed, and it is moved from the first gas storage external pipe a5 to the first connecting pipe a2.

[0197] In its air supply method, the air spring can still have two circuits for inflation and deflation; for specific adjustment procedures, refer to the first and second cases.

[0198] Based on the above, it can be understood that the air supply system disclosed in this utility model is essentially a dual-circuit closed-loop air supply system. When the vehicle is lifted, there are two circuits for air supply: the high-pressure air tank 14 and the first air tank 13, which increases the lifting speed. When the vehicle is lowered, exhaust can also be supplied to the two circuits: the high-pressure air tank 14 and the first air tank 13, which increases the lowering speed.

[0199] Meanwhile, the pressure of the first air tank 13 and the high-pressure air tank 14 can be flexibly set to meet the adjustment speed requirements under different working conditions. The adjustment speed can be increased when the vehicle speed is low and decreased when the vehicle speed is high.

[0200] In this utility model, the first air storage tank 13 and the high-pressure air storage tank 14, when the air spring is designed to be at the same height, the first air storage tank 13 stores low-pressure gas with a gas pressure lower than the minimum air pressure of the air spring; the high-pressure air storage tank 14 stores high-pressure gas with a gas pressure higher than the maximum air pressure of the air spring.

[0201] When the air spring is venting, the air can be directly vented to the first air tank 13 by controlling the opening and closing of the valve and the piping arrangement, or it can be compressed and vented to the high-pressure air tank 14 by the compressor. One or both of these circuits can be selected.

[0202] When two of them are selected, the exhaust speed, i.e. the vehicle height descent speed, can be significantly accelerated by properly setting the pressure of the first air tank 13 and the high-pressure air tank 14. When a rapid descent speed is not required, such as when adjusting at a higher vehicle speed, only one circuit or two circuits can be used. By properly setting the pressure of the first air tank 13 and the high-pressure air tank 14, the vehicle height descent speed can be reduced.

[0203] When inflating the air spring, inflation can be achieved directly from the high-pressure air tank 14 or by compressing the gas in the first air tank 13 using a compressor, through the control valve opening and closing combination and the pipeline setup. One or both of these circuits can be selected. When both are selected, the inflation speed, i.e., the vehicle height lifting speed, can be significantly accelerated by appropriately setting the pressures of the first air tank 13 and the high-pressure air tank 14. When a rapid lifting speed is not required, such as when adjusting for higher vehicle speeds, one or both circuits can be selected, and the vehicle height lifting speed can be reduced by appropriately setting the pressures of the first air tank 13 and the high-pressure air tank 14.

[0204] The pressure of the first air tank 13 and the high-pressure air tank 14 is set reasonably by detecting and adjusting the pressure difference between the first air tank 13 and the high-pressure air tank 14. This pressure difference setting is related to the vehicle speed.

[0205] When the vehicle speed is lower than the preset value, the pressure difference is set to be relatively large, such as 7-13 bar. If the pressure difference is less than 7 bar, the gas in the first gas tank 13 is compressed into the second gas tank 14 through the control valve opening and closing combination and pipeline setting until the pressure difference range is met. If the pressure difference is greater than 13 bar, the circuit Ts between the second gas tank 14 and the first gas tank 13 is opened through the control valve opening and closing combination and pipeline setting until the pressure difference is reduced to within the range.

[0206] Ts is obtained through calibration.

[0207] When the vehicle speed is higher than the preset value, the pressure difference is set to a smaller value, such as 3-7 bar.

[0208] Furthermore, it should be clarified that this utility model discloses multiple control valves. In specific implementations, the opening and closing of different control valves, as well as the coordinated operation between different control valves, can change the flow direction of gas in the gas supply unit. Different gas flow directions will bring different technical effects. The above embodiments only mainly describe the main usage routes of this utility model, but the undisclosed gas flow paths are also within the protection scope of this utility model. Because the essence of this utility model is to change the usage of traditional gas supply systems by optimizing gas pipelines, etc., the gas flow paths not specifically described above should also be within the protection scope of this utility model.

[0209] Obviously, the specific implementation of this utility model is not limited to the above-mentioned methods. Any non-substantial improvements made using the inventive concept and technical solution of this utility model are within the protection scope of this utility model.

Claims

1. A gas supply system, characterized by, Includes an air storage unit connected to the air spring assembly; The gas storage unit includes a first gas storage unit and a second gas storage unit; Both the first air storage unit and the second air storage unit can be used to control the air pressure in the air spring assembly; There is a gas pressure difference between the gas pressure in the first gas storage unit and the gas pressure in the second gas storage unit.

2. A gas supply system according to claim 1, wherein The gas pressure in the first gas storage unit is not greater than the gas pressure in the second gas storage unit.

3. A gas supply system according to claim 2, wherein The gas pressure in the first gas storage unit is less than the minimum gas pressure in the air spring of the air spring assembly; the gas pressure in the second gas storage unit is greater than the maximum gas pressure in the air spring of the air spring assembly.

4. The air supply system of claim 1, wherein The gas supply system also includes a communication control unit, through which the first gas storage unit and the second gas storage unit are connected.

5. A gas supply system according to any one of claims 1 to 4, wherein The gas supply system also includes a gas supply unit; the gas supply unit is connected to the gas storage unit; The gas supply unit includes a valve body and an ECU; the valve body is connected to a gas pressure control unit. The air pressure control unit includes an air supply unit and an air spring control unit; The air supply unit is connected to the air spring control unit via a connection control unit; The connection control unit includes a first control unit and a second control unit; The air inlet of the air supply unit is connected to the air spring control unit via the first control unit; the air outlet of the air supply unit is connected to the air spring control unit via the second control unit. The first gas storage unit in the gas storage unit is connected to the first control unit; the second gas storage unit in the gas storage unit is connected to the second control unit. Both the first control unit and the second control unit are equipped with at least one control valve.

6. A gas supply system according to claim 5, wherein The gas supply unit is connected to the second control unit through the drying unit; The gas supply unit includes a compressor; The drying unit includes a dryer; the compressor includes at least one air compression pump; The first gas storage unit includes a first gas storage tank, which is connected to a first control unit; the second gas storage unit includes a second gas storage tank, which is connected to a second control unit.

7. A gas supply system according to claim 5, wherein The air supply unit is connected to an air replenishment unit at its air inlet end; the air replenishment unit includes an air replenishment pipe, and a filter is connected to the end of the air replenishment pipe away from the air supply unit; a one-way valve is provided on the air replenishment pipe; the air supply unit is connected to an exhaust unit at its air outlet end, and the exhaust unit includes an exhaust pipe, and a tenth control valve is provided on the exhaust pipe.

8. A gas supply system according to claim 5, wherein The second control unit is connected to the first control unit, and the second control unit is connected to the cavity spring control unit through the first control unit.

9. A gas supply system according to claim 5, wherein The air pressure control unit further includes a detection unit connected to the first control unit; the detection unit includes a pressure sensor disposed on the first control unit.

10. An air spring system for a vehicle, characterized by, It includes an air spring assembly, which comprises a plurality of air springs; the air spring assembly is connected to an air supply system as described in any one of claims 1-9.

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