Air supply system and air spring system with same

Abstract

The invention 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 air supply system comprises an air storage unit connected with an air spring assembly; 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 which have the pressure difference are used in cooperation, the speed adjusting requirements of different working conditions can be met, when the 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] The present invention relates to the field of vehicle parts, in particular to an air supply system and an air spring system having the air supply system. Background Art

[0002] Currently, more and more passenger cars are equipped with air suspension systems, which can enable the vehicle to be lifted and lowered.

[0003] From the document 201580019730.9 “Integrated Air Supply Unit” an air spring arrangement for a vehicle is known, which comprises the essential components of a current air spring system.

[0004] The air supply systems of air suspensions on the market are divided into open systems and closed systems. The principle of the 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 spring. When the vehicle needs to be lowered, the air spring directly exhausts air into the atmosphere.

[0005] The principle of the closed system is to pour air from the air spring and the air tank. When the vehicle needs to be lifted, air is sucked from the air tank and exhausted to the air spring through the compressor. When the vehicle needs to be lowered, air is sucked from the air spring and exhausted to the air tank through the compressor.

[0006] In vehicle height adjustment scenarios, the convenient entry and exit mode requires fast adjustment speed, such as for SUVs and pickup trucks, and for sports cars and sedans, fast raising. The convenient loading mode lowers the rear axle height to facilitate loading heavy objects into the trunk or rear bed, which requires fast lowering.

[0007] When the vehicle encounters an emergency, such as wading on a flooded road, a fast lifting speed is required. When the vehicle speed is high, for the sake of vehicle safety, a fast speed adjustment is not required.

[0008] In the prior art, open systems need to exhaust gas into the atmosphere, resulting in energy waste and higher power consumption. The pressure of the gas storage tank is generally higher, requiring a compressor with higher power.

[0009] When the vehicle height is continuously adjusted, there is no time to inflate the air tank, so the air spring can only be inflated directly, and the vehicle height lifting speed is very slow.

[0010] The exhaust process of the open system is the desiccant regeneration process, which requires a throttle to reduce the pressure, thus limiting the rate of decompression.

[0011] In a closed system, the pressure in the gas tank cannot be too high. If it is too high, the exhaust speed will be slow, which will cause the vehicle height to drop more slowly.

[0012] The air tank pressure cannot be too low. When it is too low, the inflation speed is slow, which causes the vehicle height to rise slowly. In order to balance the lifting speed and the lowering speed, the air tank pressure is generally close to the air spring design pressure. Therefore, the lifting speed and the lowering speed are limited.

[0013] Moreover, when the vehicle is fully loaded, the air spring pressure is higher, the air tank pressure is lower, and the vehicle lifting speed is slower. When the vehicle is unloaded, the air spring pressure is lower, the air tank pressure is higher, and the lowering speed is slower.

[0014] In summary, regardless of the existing open or closed system, its lifting speed and lowering speed cannot be very fast due to various reasons, resulting in the inability to meet the usage requirements when it is convenient to get on and off the vehicle and convenient loading mode. The function is relatively useless, and the speed is also limited when lifting is required in an emergency.

[0015] At the same time, open systems also have problems such as 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. Summary of the Invention

[0017] The object of the present invention is to provide a gas supply system with fast response speed.

[0018] In order to achieve the above purpose, the technical solution adopted by the present invention is:

[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] The first air storage unit and the second air storage unit can both 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 no greater than the gas pressure in the second gas storage unit.

[0024] The gas pressure in the first gas storage unit is lower than the lowest gas pressure in the air spring of the air spring assembly; the gas pressure in the second gas storage unit is higher than the highest gas pressure in the air spring of the air spring assembly.

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

[0026] The gas supply system further comprises 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 end of the air supply unit is connected to the air spring control unit through the first control unit; the air outlet end of the air supply unit is connected to the air spring control unit through 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] The first control unit and the second control unit are each provided with at least one control valve.

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

[0035] The air 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, and the first gas storage tank is connected to the first control unit;

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

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

[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 arranged on the first control unit.

[0042] A vehicle air spring system includes an air spring assembly, wherein the air spring assembly includes a plurality of air springs; and the air spring assembly is connected to the air supply system.

[0043] The advantages of the present invention are:

[0044] The invention discloses an air supply system and an air spring system having the air supply system.

[0045] The air supply system disclosed in the present invention can meet the adjustment speed requirements of different working conditions through the coordinated use of a first air storage unit and a second air storage unit with a pressure difference. 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 discharged to two circuits of the first air storage unit and the second air storage unit to increase the lowering speed, thereby improving the adjustment response speed of the air spring in the vehicle using the air supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The following is a brief description of the contents of the drawings in the specification of the present invention:

[0047] Figure 1 FIG. 1 is a schematic structural diagram of the first embodiment of the present invention.

[0048] Figure 2 2 is a schematic structural diagram of a second embodiment of the present invention.

[0049] Figure 3 FIG. 4 is a schematic structural diagram of a third embodiment of the present invention.

[0050] Figure 4 This is a structural schematic diagram of a throttle valve and a one-way valve arranged in a valve body in the first embodiment of the present invention.

[0051] Figure 5 This is a structural schematic diagram of a throttle valve and a one-way valve arranged in a valve body in a second embodiment of the present invention.

[0052] Figure 6 Schematic diagram of the structure in which the throttle valve and the one-way valve are arranged in the valve body in the third embodiment of the present invention.

[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 one-way valve, 17: Throttle orifice assembly, 18: Power limiting valve, 19: Second one-way valve, 20: Valve body, 21: Pressure sensor, 22: Filter. DETAILED DESCRIPTION

[0054] The specific implementation of the present invention will be further explained in detail below by describing the best embodiment with reference to the accompanying drawings.

[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; the first air storage unit and the second air storage unit can both be used to control the air pressure in the air spring assembly; the gas pressure in the first air storage unit and the gas pressure in the second air storage unit have a gas pressure difference; by the coordinated use of the first air storage unit and the second air storage unit with a pressure difference, the adjustment speed requirements of different working conditions can be met. 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, air can also be exhausted to two circuits of the first air storage unit and the second air storage unit to increase the lowering speed, thereby improving the adjustment response speed of the air spring in the vehicle using the air supply system.

[0056] At the same time, it should be noted that the gas in the first gas storage unit and the second gas storage unit of the present invention has a gas pressure difference, where 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, the gas pressure difference is required to be greater than zero and less than zero, but it does not mean that it cannot be used when it is equal to zero. It is just that the gas pressure difference greater than zero and less than zero has a better use effect.

[0058] The present invention significantly improves the response speed of the air spring when the vehicle is lifted and lowered by using a first air storage unit and a second air storage unit with different air pressures in combination.

[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 layout on the vehicle and reduces costs.

[0060] At the same time, the first gas storage unit and the second gas storage unit can adjust the flow of gas in the gas supply system according to actual needs, thereby improving the flexibility and adaptability of the system.

[0061] In the present invention, 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 elastic effect. It is usually used in vehicle suspension systems and other occasions to adjust the suspension's height, stiffness and other performance by changing the air pressure.

[0063] 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; this means that the system can supply or exhaust air to the air spring assembly through the first air storage unit and the second air storage unit, thereby adjusting the air pressure inside the air spring assembly and achieving the purpose of adjusting the performance of the air spring assembly.

[0064] In the vehicle suspension system, the air pressure can be controlled to adjust the vehicle body height and suspension stiffness to adapt to different road conditions and driving requirements.

[0065] 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; by maintaining a certain gas pressure difference, the flow direction and flow of the gas can be controlled more flexibly, thereby improving the accuracy and response speed of the system's adjustment of the air spring assembly's air pressure.

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

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

[0068] Since both the first air storage unit and the second air storage unit can participate in air pressure control and there is a pressure difference, the system can adjust the air pressure of the air spring assembly more flexibly; the air pressure can be increased or decreased in an appropriate manner and speed according to different needs and working conditions, thereby improving the adaptability and control accuracy of the system.

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

[0070] Furthermore, in the present 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 of the second gas storage unit is always higher than or equal to the pressure of the first gas storage unit. Such a design facilitates the formation of a high-pressure zone and a low-pressure zone, which is convenient for subsequent use.

[0071] During subsequent use, when the vehicle height needs to be lowered (the air spring assembly is actively inflated and deflated for adjustment), the air spring gas is first exhausted to the first air storage unit to ensure the descending rate; when the vehicle is lifted (the air spring assembly is actively inflated and deflated for adjustment), the gas in the second air storage tank is first exhausted to the air spring assembly spring to ensure the lifting rate.

[0072] In addition, in the present invention, the gas pressure in the first air storage unit is lower than the lowest air pressure in the air spring of the air spring assembly; the gas pressure in the second air storage unit is higher than the highest air pressure in the air spring of the air spring assembly; the gas pressure in the first air storage unit is lower than the lowest air pressure in the air spring of the air spring assembly; such a setting can facilitate the subsequent active deflation adjustment of the air spring assembly, and the external gas is discharged to the first air storage unit, thereby ensuring the vehicle height descent rate.

[0073] 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; this shows that the pressure in the second air storage unit is high enough to provide sufficient gas for the air spring to maintain its normal working pressure. Subsequently, the air spring assembly needs to be inflated and adjusted. At this time, the gas in the second air storage unit can be supplied to the air spring assembly. This setting ensures the lifting rate of the vehicle.

[0074] Based on the above design, the first air storage unit can be used to collect exhaust gas from the air spring assembly, while the second air storage unit can be used to quickly inflate the air spring assembly. The two work together to achieve more flexible and precise air pressure regulation to meet the needs of the air spring assembly under different working conditions.

[0075] Furthermore, in the present invention, the gas supply system further includes a communication control unit, and the first gas storage unit and the second gas storage unit are connected via the communication control unit; 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 facilitate ensuring 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 the first gas storage unit and the second gas storage unit; When a lifting and lowering or lowering and lifting is completed, the pressure difference between the low-pressure gas tank and the high-pressure gas tank 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, the seventh solenoid valve and the eighth solenoid valve are opened, and the gas in the first gas tank is inflated into the second gas tank. At the same time, through the detection of the detection unit, the detection unit can detect the gas pressure difference between the above-mentioned first gas tank and the second gas tank; if the pressure difference is higher than the upper limit, the fifth solenoid valve, the sixth solenoid valve, and the ninth solenoid valve are opened for Ts to exhaust the gas in the high-pressure gas tank into the low-pressure gas tank to reduce the pressure difference.

[0076] Ts is obtained by calibration.

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

[0078] In the present invention, 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 the present invention can meet the adjustment speed requirements of different working conditions by the coordinated use of the first air storage unit 105 and the second air storage unit 104 with a pressure difference. 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, air can also be exhausted 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 the air supply system.

[0079] In the present invention, the gas supply unit includes a valve body 20 and an ECU 12; an air pressure control unit is provided in the valve body 20; the gas supply unit is mainly used to control the gas in the corresponding air spring during subsequent use, thereby realizing the use control of the air spring, and also facilitating the subsequent height control of the vehicle using the air supply system.

[0080] In addition, the gas running in the gas supply system of the present invention can be a gas structure such as air, nitrogen, argon, etc., and can be selected and used according to needs.

[0081] In the present invention, the gas supply unit includes a valve body 20; the valve body 20 is the main external supporting structure and is hollow inside, which facilitates the arrangement and placement of the air pressure control unit; in addition, in the present invention, the valve body 20 is connected to the ECU12; the ECU12 facilitates the control of the air pressure control unit; an air pressure control unit is provided in the valve body 20; the setting of the air pressure control unit facilitates the control of the flow direction of the gas in the air supply system.

[0082] In the present invention, the air pressure control unit 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 through a connection control unit; the setting of the air supply unit facilitates the subsequent control of gas in and out of the air spring control unit 101; the air spring control unit 101 is mainly used to connect with the air spring assembly, and ultimately realize subsequent control operations on the corresponding air spring; at the same time, the air supply unit can also perform subsequent inflation operations for the air storage unit; ensure the air pressure in the air storage unit; at the same time, the air supply unit can also control the gas flow in the first air storage unit 105 and the second air storage unit 104, so as to facilitate the gas pressure difference in the first air storage unit 105 and the second air storage unit 104.

[0083] In addition, in the present invention, the air supply unit is connected to the air spring control unit 101 through a connection control unit; the connection control unit mainly plays a role of connection and communication, so that the entire air supply system forms a closed loop; in the present invention, the connection control unit includes a first control unit 102 and a second control unit 103; the air inlet end of the air supply unit is connected to the air spring control unit 101 through the first control unit 102; the air outlet end of the air supply unit is connected to the air spring control unit 101 through the second control unit 103; in the present invention, the air supply unit, the first control unit 102, the second control unit 103 and the air spring control unit 101 form a ring-shaped closed loop, which can be used in conjunction with the air storage unit to form a dual-circuit closed air supply system; such a setting facilitates the air supply operation of the air supply unit, and at the same time, it also facilitates the dual-circuit control of the air intake and outlet of the air spring control unit 101, which is conducive to improving the response speed of the air spring.

[0084] In addition, in the present invention, 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 intake and exhaust operations of the air spring control unit 101 during subsequent use.

[0085] At the same time, in order to improve the response speed of the air spring to rise and fall, in the present invention, 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; the specific gas pressure difference here is selected according to the actual working conditions.

[0086] In the present invention, the first air storage unit 105 is a low-pressure area and the second air storage unit 104 is a high-pressure area. The gas pressure in the first air storage unit 105 is relatively small. When the air spring needs to be exhausted, the exhausted gas can be stored in the first air storage unit 105, thereby ensuring the exhaust efficiency of the air spring, thereby ensuring the descending efficiency of the air spring, while the gas pressure in the second air storage unit 104 is relatively large, thereby ensuring the air intake efficiency of the air spring, thereby ensuring the rising efficiency of the air spring.

[0087] In addition, in the present invention, in order to control the direction of the gas, at least one control valve is provided on the first control unit 102 and the second control unit 103 of the present invention; the number of control valves can be selected as needed, as long as the stable flow of gas in the gas supply system can be achieved and the corresponding flow of gas in the gas supply system can be controlled as needed.

[0088] At the same time, in the present invention, the air pressure control unit 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, the air storage unit can also be provided with other air storage units, such as a third air storage unit or a fourth air storage unit, and the actual design quantity is selected according to needs; it is more convenient to use in actual production.

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

[0090] In actual use, the setting of the first air storage unit 105 and the second air storage unit 104 can be selected as needed; the setting of the first air storage unit 105 and the second air storage unit 104 in the present invention is mainly to form a double circuit in the air supply system, which facilitates the air intake and exhaust operations of the air spring and improves the response efficiency of the air spring.

[0091] In the present 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 setting of the first air storage unit 105 and the second air storage unit 104, the present invention can supply air to the air spring during subsequent use, and can also collect the exhaust gas of the air spring; when it is necessary to supply air to the air spring control unit 101, the gas stored in the air storage unit disclosed in the present invention can quickly realize the air supply operation to the air spring control unit 101; when the vehicle body needs to be lowered or the air spring assembly needs to be exhausted, the exhaust gas of the air spring assembly can be stored in the air storage unit through the air spring control unit 101.

[0092] In the present invention, 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 the present invention, 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 the present invention, the first gas storage unit 105 includes a first gas tank 13, and the first gas tank 13 mainly has two functions, one is to store gas, and the other is to supply gas to the air spring assembly; in the present invention, the first gas tank 13 is connected to the air spring control unit 101 through the first control unit 102; such a setting facilitates the coordinated use between the first gas tank 13 and the air spring control unit 101, and the first control unit 102 is provided with a sixth control valve 6; the setting of the sixth control valve 6 is mainly to control the on and off of the first connecting pipe a2; it is convenient to change the flow direction of the gas as needed during subsequent use, so as to realize the storage and discharge of gas in the first gas tank 13.

[0095] In addition, the air storage unit in the present invention also includes a second air storage unit 104; 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; the present invention increases the response speed of the air pressure control unit to the control of the air spring assembly through the setting of the second air storage unit 104; in the present invention, the second air storage unit 104 includes a second air tank 14, and the second air tank 14 is connected to the first connecting pipe a2 or the air spring control unit 101 through a second connecting pipe a3; a seventh control valve 7 is provided on the second connecting pipe a3; the present invention facilitates the connection between the second air tank 14 and the corresponding components through the setting of the second connecting pipe a3, and the setting of the seventh control valve 7 is mainly used to control the on and off of the second connecting pipe a3, so as to facilitate the control of the discharge of gas in the second air tank 14 and the control of external gas entering the second air tank 14.

[0096] At the same time, in the present invention, the gas storage unit can also be provided with other gas storage units, such as a third gas storage unit or a fourth gas storage unit, and the actual design quantity is selected according to needs; the purpose of such design is mainly that the gas supply system of the present invention can be compatible with a single gas storage unit and a double gas storage unit, or even more gas storage connection methods; it is more convenient to use in actual production.

[0097] In order to reduce costs and facilitate subsequent layout on the vehicle, in actual design, the gas storage unit generally includes a first gas storage unit 105 and a second gas 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 the present 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 in a low-pressure state for a long time, thereby achieving a fast response when the vehicle body is lowered.

[0100] Of course, the first gas storage unit 105 and the second gas storage unit 104 of the present invention can cooperate with each other and be used at the same time. 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 mentioned above, and can change the flow control of the gas in the gas supply system as needed; it is convenient for use in actual production.

[0101] In the present invention, the gas pressure in the first air storage unit 105 is lower than the gas pressure in the second air storage unit 104; the gas pressure in the first air storage unit 105 is lower than the lowest air pressure in the air spring connected to the air spring control unit 101; the gas pressure in the second air storage unit 104 is greater than the highest air pressure in the air spring connected to the air spring control unit 101; in the present invention, the first air storage unit 105 is a low-pressure area and the second air storage unit 104 is a high-pressure area. The gas pressure in the first air storage unit 105 is relatively small. When the air spring needs to be exhausted, the exhausted gas can be stored in the first air storage unit 105, thereby ensuring the exhaust efficiency of the air spring, thereby ensuring the descending efficiency of the air spring, while the gas pressure in the second air storage unit 104 is relatively large, thereby ensuring the intake efficiency of the air spring, thereby ensuring the rising efficiency of the air spring.

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

[0103] In addition, in the present invention, the gas supply unit is connected to the drying unit through a pipe unit; the present invention can facilitate the connection between the gas supply unit and the drying unit through the above-mentioned arrangement. In the present invention, the pipe unit includes an external pipe a5; the drying unit is respectively connected to the gas supply unit and the second control unit 103 through the external pipe a5; the drying unit of the gas supply system disclosed in the present invention is set independently of the gas supply unit, and the two are connected through the external pipe a5. Such a setting can facilitate the subsequent replacement of the drying unit; at the same time, the external drying unit facilitates the separate arrangement of the drying unit. Subsequently, by controlling the length and arrangement of the external pipe a5, the arrangement position of the drying unit can be changed as needed during actual use, thereby optimizing the spatial arrangement of the entire gas supply system and reducing interference between the gas supply system and adjacent components.

[0104] In the present invention, 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 such a setting, the subsequent control of the air spring control unit 101 by the air supply unit is facilitated.

[0105] In the present invention, the air supply unit is required to be connected to the air spring control unit 101 through a drying unit; the pipeline unit includes an external pipeline a5; the drying unit is respectively connected to the air supply unit and the air spring control unit 101 through the external pipeline a5; the setting of the drying unit enables the gas provided by the air supply unit to enter the corresponding air spring control unit 101 after drying; ultimately, the dryness of the gas subsequently entering the air spring assembly is ensured.

[0106] In addition, the setting of the drying unit can also ensure the dryness of the air in the air supply system.

[0107] Furthermore, the air supply unit in the present invention includes a compressor; the compressor is connected to a drive motor, and the compressor includes one or more air compression pumps; in the present invention, the air inlet end of the compressor is connected to the first control unit 102, and the air outlet end is connected to the 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 intake and exhaust operations of the air spring.

[0108] In the present invention, the drying unit includes a dryer 15; the dryer 15 is mainly used to dry the passing gas.

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

[0110] At the same time, the drying unit in the present invention includes a dryer 15, a throttle valve, a one-way valve and other structures. The layout positions of the throttle valve and the one-way valve can be selected as needed. They can be arranged inside the valve body or outside the valve body. They can be specifically arranged according to needs. Please refer to the attached drawings for details. The setting of the dryer 15 can dry the gas passing through the dryer 15, reduce the water content in the gas, and avoid the water in the gas affecting the service life of the air spring.

[0111] In addition, the pipeline unit described in the present invention includes an external pipeline a5; the setting of the external pipeline a5 plays a good bridging role, facilitating the connection between the dryer 15 and the corresponding components. Specifically, the dryer 15 described in the present invention is connected to the air supply unit and the second control unit 103 through the external pipeline a5 respectively; the dryer 15 is connected to the compressor in the air supply unit through an external pipeline a5, and the dryer 15 is connected to the second control unit 103 through another external pipeline a5; based on such a setting, the air supply unit, the drying unit and the air spring control unit 101 form a loop, which is convenient for the subsequent use of the air spring assembly to supply or exhaust air, thereby realizing the subsequent normal use of the air spring assembly.

[0112] At the same time, in the present invention, the first gas storage unit 105 includes a first gas tank 13, which is connected to the first control unit 102; specifically, the first gas 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 tank 14, which is connected to the second control unit 103; specifically, the second gas tank 14 is connected to the second control unit 103 through a second gas storage external pipe a4. Based on such a design, the connection between the first gas tank 13 and the second gas tank 14 and adjacent components is facilitated.

[0113] In addition, in the present 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 such a design, the present invention keeps the first air storage tank 14 in a low-pressure state for a long time, which facilitates the rapid movement of the gas in the air spring group to the first air storage tank 13, thereby facilitating the improvement of the response speed when the vehicle body is lowered; 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; the air pressure in the second air storage unit 104 is better guaranteed and the air pressure in the first air storage unit 105 is reduced; the pressure difference between the first air storage unit 105 and the second air storage unit 104 is guaranteed.

[0114] Furthermore, in the present invention, the air inlet end of the air supply unit is connected to an air supply unit; the air supply unit includes an air supply pipe, and the end of the air supply pipe away from the air supply unit is connected to a filter 22; a one-way valve is provided on the air supply pipe; the air outlet end of the air supply unit is connected to an exhaust unit, and the exhaust unit includes an exhaust pipe, and the exhaust pipe is provided with a tenth control valve 10; the present invention is based on the coordinated use of the air supply unit and the exhaust unit, which facilitates the control of the gas pressure inside the air supply system.

[0115] In the present invention, the air supply pipeline can be directly connected to the atmosphere; such a setting facilitates the air supply operation to the compressor during subsequent use; and then realizes the air supply operation of the entire air supply system or the air pressure control unit; the exhaust pipeline is also directly connected to the atmosphere, which facilitates the decompression operation of the exhaust gas when the pressure of the air supply system is too high.

[0116] Furthermore, in the present 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 such a setting, 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 an annular passage, which facilitates the movement of gas in the annular passage. At the same time, based on such a connection, it is convenient to subsequently realize the pressure in the first gas storage unit 105 and the second gas storage unit 104 through a detection unit, reducing the use of the detection unit; at the same time, the first control unit 102 is communicated with the second control unit 103, which facilitates the reciprocating flow of gas in the first gas storage unit 105 and the second gas storage unit 104.

[0117] Furthermore, in the present invention, the connection control unit also includes a connection control unit 106, and the first gas storage unit 105 and the second gas storage unit 104 are connected through the connection control unit 106; the connection control unit 106 is mainly used for the connection between the first gas storage unit 105 and the second gas storage unit 104, so as to facilitate the pressure difference between the first gas storage unit 105 and the second gas storage unit 104. In the present invention, a connecting pipe a8 is provided on the connection control unit 106, and a ninth control valve 9 is provided on the connecting pipe a8; the ninth control valve 9 is used to control the on and off of the connecting pipe a8, and the connecting pipe a8 is used to move the gas in the second gas storage unit 104 to the first gas storage unit 105.

[0118] Furthermore, in the present invention, the air pressure control unit also includes a detection unit connected to the first control unit 102; the detection unit includes a pressure sensor 21 arranged on the first control unit 102; the setting of the pressure sensor 21 of the present invention is mainly used to detect the pressure in the first air storage unit 105 and the second air storage unit 104; it is convenient to identify the pressure difference between the first air storage unit 105 and the second air storage unit 104; and it is convenient to control the pressure difference between the first air storage unit 105 and the second air storage unit 104 during subsequent use.

[0119] A vehicle air spring system includes an air spring assembly, wherein the air spring assembly includes a plurality of air springs; the air spring assembly is connected to the air supply system; the air spring system disclosed in the present invention is provided with an air supply system; a dual air storage tank strategy is adopted to improve the adjustment response speed of the air supply system to the descent of the vehicle body; at the same time, in actual design, the air supply system disclosed in the present invention can be provided with different numbers of control valves as needed; that is, a suitable air supply system can be selected according to needs, thereby increasing the scope of application of the present invention 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 in the present invention includes a spring main pipe a7, and the air spring control unit 101 includes multiple single spring control units connected to the spring main pipe a7; each single 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 single spring control units are generally set up, mainly for use with four air springs; one single spring control unit corresponds to one air spring; the branch control valves on the four single spring control units are mainly called the first control valve 1, the second control valve 2, the third control valve 3 and the fourth control valve 4 because of their different setting positions; at the same time, the air springs are divided into the first air spring 23, the second air spring 24, the third air spring 25 and the fourth air spring 26 because of their different setting positions; please refer to the attached Figure 1 shown.

[0122] In actual implementation, the air spring system disclosed in the present invention can be provided with eight-valve bodies, nine-valve bodies and ten-valve bodies. The above-mentioned eight-valve bodies, nine-valve bodies and ten-valve bodies mainly refer to the number of control valves provided in the air spring system. The specific selection can be made according to needs.

[0123] The specific implementation plan is as follows:

[0124] The air supply system disclosed in the present invention is mainly used for the air spring system of a motor vehicle. The air supply system disclosed in the present invention 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, and the gas supply unit mainly includes a valve body 20, an ECU12 controller and an air pressure control unit; and the air 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 the present invention, the air storage unit includes a first air storage unit 105 and a second air storage unit 104. The first air storage unit 105 is connected to the first control unit 102, and the second air storage unit 104 is connected to the second control unit 103. Based on such a setting, in actual use, the gas in the air spring assembly can flow to the two air storage units at the same time or to one of the air storage units; the two air storage units can be independent or integrated together but separated into two cavities.

[0126] In the present invention, the air supply unit includes a compressor, which can also be an air compression pump and other components, which mainly supply gas to the entire air pressure control unit and control the flow direction of the gas; in actual use, the air compression pump or compressor is arranged in the valve body 20 and is driven by the eccentric shaft at the output end of a brushed motor or a brushless motor. The design number of gas pumps can be greater than or equal to 1.

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

[0128] When the air supply system disclosed in the present invention is used in a vehicle, an air spring system for the vehicle will be formed. The air spring system disclosed in the present invention can adjust the height of the entire vehicle, the height of a certain axle of the vehicle, or the height of the air spring on a certain side of the vehicle.

[0129] In addition, the control valves disclosed above and below may adopt a solenoid valve structure during actual design; specifically, they may be two-position, two-way solenoid valves.

[0130] In the present invention, the essence of the present invention is a dual-circuit closed air supply system: it mainly includes a compressor, a drying unit, a valve body 20, an ECU 12, a dryer 15, a first air storage tank 13, a second air storage tank 14 and a number of connection control units, where the connection control unit is essentially a connection pipe, a connection pipeline or a connection air duct.

[0131] In the present invention, 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 ECU 12 are integrated.

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

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

[0135] Example 1:

[0136] The present invention essentially discloses a dual-circuit closed air supply system: it mainly includes a compressor, a drying unit, a valve body 20, an ECU 12, a dryer 15, a first air storage tank 13, a second air storage tank 14 and several connection control units, where the connection control unit is essentially a connection pipe, a connection pipeline or a connection air duct.

[0137] In the present invention, 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 ECU 12 are integrated.

[0139] The valve body 20 is provided with a control valve and a connection control unit.

[0140] The gas supply system includes ten control valves, namely the first control valve 1, the second control valve 2, the third control valve 3, the fourth control valve 4, the fifth control valve 5, the sixth control valve 6, the seventh control valve 7, the eighth control valve 8, the ninth control valve 9 and the tenth control valve 10; the connection control unit is connected to the compressor, the first to the tenth control valves, the dryer 15, the first gas tank 13 and the high-pressure gas 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 respectively connected to an air spring through four branch pipes a1. The number of air springs may not be 4. For example, some vehicle models only have 2 air springs on the rear axle, then only the first to second control valves are connected to the 2 air springs.

[0142] In the present invention, the air spring control unit 101 includes a spring main pipe a7, and the air spring control unit 101 includes multiple single spring control units connected to the spring main pipe a7; each single 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.

[0143] During actual installation, four single spring control units are generally set up, mainly for use with four air springs; one single spring control unit corresponds to one air spring; the branch control valves on the four single spring control units are mainly called the first control valve 1, the second control valve 2, the third control valve 3 and the fourth control valve 4 because of their different setting positions; at the same time, the air springs are divided into the first air spring 23, the second air spring 24, the third air spring 25 and the fourth air spring 26 because of their different setting positions; please refer to the attached drawings 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 one end of the first connecting pipe a2 close to the spring main pipe a7; the detection unit is mainly a pressure sensor 21 connected to the first control unit 102.

[0145] In the present invention, the fifth control valve is connected to the first gas storage external pipeline a5, and the fifth control valve 5 is used to control the on-off of the first gas storage external pipeline a5. The sixth control valve is connected to the first connecting pipeline a2. The sixth control valve is essentially also used for on-off control of the first connecting pipeline a2, but its position is between the connection point of the first gas storage external pipeline a5 and the first connecting pipeline a2 and the spring main pipeline a7.

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

[0147] In the present invention, the eighth control valve is connected to the second gas storage external pipeline a4, and is used to control the on-off of the second gas storage external pipeline a4.

[0148] In the present invention, 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 arranged in the communication control pipeline to realize on-off control of the communication control pipeline.

[0149] In the present invention, 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 via an external pipe a5 .

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

[0151] A first one-way valve 16 and a throttle assembly 17 are provided on the external pipe a5 of the dryer 15 near one end of the second connecting pipe a3. The first one-way 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 throttle hole.

[0153] In the present invention, the tenth control valve is connected to the exhaust pipe; it is used to control the on-off of the exhaust pipe to facilitate subsequent exhaust into the atmosphere.

[0154] In addition, in the present invention, 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, the filter 22 is connected to the atmosphere, and 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 the present invention, parallel pipes a7 are provided at both ends of the compressor, and a power limiting valve 18 is provided on the parallel pipe a7. When the compressor outlet pressure is too high, the power limiting valve 18 can conduct the parallel pipe a7, connecting the first connecting pipe a2 with the external pipe a5, so that the inlet and outlet pressures of the compressor are the same, thereby protecting the compressor.

[0156] The ECU 12 can control the opening and closing of the control valve and whether the compressor is working, and can receive signals from the pressure sensor 21 and output a pressure value.

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

[0158] At the designed height of the air spring, the air pressure in the first air storage tank 13 is lower than the lowest air pressure of the air spring; and the air pressure in the high-pressure air storage tank 14 is higher than the highest air pressure of the air spring.

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

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

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

[0162] The seventh control valve is provided on the second connecting pipe a3, and is located between the connection point between the second gas storage external pipe a4 and the second connecting pipe a3 and the connection point 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, the seventh control valve and the eighth control valve are opened, and at the same time, 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.

[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 pipeline a4 and is 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, the air pressure in the first air storage tank 13 is compressed by the compressor, and then inflated into the air spring through the first air storage external pipeline a5, the first control unit 102, the second control unit 103 and the first control unit 102 at the same time.

[0167] Based on the above, there are two circuits for supplying air to the air spring, namely, the high-pressure air tank 14 charging circuit and the first air tank 13 charging circuit. By reasonably setting the initial pressures 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] When the air spring is inflated, in the above process, the pressure of the high-pressure gas tank 14 is continuously reduced, and the air pressure of the air spring is increased. When the pressure of the high-pressure gas tank 14 is close to the air pressure of the air spring, the lifting speed will slow down.

[0169] At this time, the following processing is performed: by detecting the change in lifting speed or the pressure change of the high-pressure gas tank, the working condition is identified in advance. When entering this working condition, 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 gas storage external pipeline 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 pipeline a5, the dryer 15, the second control unit 103 and the first control unit 102.

[0170] When the air spring needs to be exhausted, open 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, and open the fifth control valve and the sixth control valve. The gas in the air spring is exhausted to the first air storage tank 13 through the first control unit 102 and the first air storage external pipeline a5.

[0171] When the air spring needs to be exhausted, 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, the compressor is compressed, and the gas is exhausted to the high-pressure gas tank 14 through the external pipeline a5, the dryer 15, the second control unit 103 and the second gas storage external pipeline a4.

[0172] That is, there are two circuits for exhausting the air spring, one to the first air storage tank 13 and the other to the high-pressure air storage tank 14 .

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

[0174] When a lifting and lowering or lowering and lifting is completed, the pressure difference between the first gas tank 13 and the high-pressure gas 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 gas tank 13 is inflated into the high-pressure gas tank 14 through the first gas storage external pipe a5, the external pipe a5, the dryer 15, the second control unit 103 and the second gas storage external 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 and stop the action when the pressure reaches a certain range.

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

[0176] Ts is obtained by calibration.

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

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

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

[0180] Example 2:

[0181] In this embodiment, the eighth control valve and the ninth control valve in the first embodiment are eliminated, that is, there are only eight control valves.

[0182] This implementation case is suitable for vehicles with relatively low air spring pressure, that is, it can ensure that the pressure of the high-pressure gas storage tank 14 is always higher than the air spring pressure.

[0183] In this embodiment, the connection control unit 106 is removed; the rest is the same as the first embodiment. According to the second embodiment, the corresponding second gas supply method is as follows:

[0184] When the air spring needs to be inflated, the seventh control valve is opened, and at the same time, 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.

[0185] The gas in the high-pressure gas storage tank 14 is delivered to the air spring through the second gas storage external 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 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 inflated into the air spring at the same time through the first connecting pipe a2, the compressor, the external pipe a5, the dryer 15, the second connecting pipe a3 and the first connecting pipe a2, that is, there are two circuits for charging the air spring, namely, the high-pressure air tank 14 and the first air tank 13. By reasonably setting the initial pressures 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 exhausted, open 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, and open the fifth control valve and the sixth control valve. The gas in the air spring is exhausted to the first air storage tank 13 through the first connecting pipe a2 and the first air storage external pipe a5.

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

[0189] That is, there are two circuits for exhausting the air spring, one to the first air storage tank 13 and the other to the high-pressure air storage tank 14 .

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

[0191] When a lifting and lowering or lowering and lifting is completed, the pressure difference between the first gas tank 13 and the high-pressure gas 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 gas tank 13 is inflated into the high-pressure gas tank 14 through the first gas storage external pipe a5, the external pipe a5, the dryer 15, the second control unit 103 and the second gas storage external 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 and stop the action when the pressure reaches a certain range.

[0192] If the pressure difference is higher than the upper limit, the fifth, sixth, and seventh control valves are opened for a period of time Ts, exhausting the gas in the high-pressure gas storage tank 14 into the first gas storage tank 13 to reduce the pressure difference. Ts is obtained by calibration.

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

[0194] When the pressure of the high-pressure gas tank 14 needs to be detected, the seventh control valve is opened, and the gas in the high-pressure gas tank 14 flows through the second gas storage external pipe a4, the second connecting pipe a3 and the first connecting pipe a2 to the pressure sensor 21, and 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 pipeline a5 to the first connecting pipeline a2.

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

[0198] Based on the above, it can be known that the air supply system disclosed in the present invention is essentially a dual-circuit closed air supply system. When the vehicle is lifted, there are two circuits of high-pressure air tank 14 and first air tank 13 to supply air, thereby increasing the lifting speed. When the vehicle is lowered, exhaust can also be sent to the two circuits of high-pressure air tank 14 and first air tank 13 to increase the lowering speed.

[0199] At the same time, the pressures of the first gas storage tank 13 and the high-pressure gas storage tank 14 can be flexibly set to meet the adjustment speed requirements of different working conditions. The adjustment speed can be increased when the vehicle speed is low, and the adjustment speed can be reduced when the vehicle speed is high.

[0200] In the present invention, the first gas storage tank 13 and the high-pressure gas storage tank 14, when the air spring is at the designed height, the first gas storage tank 13 stores low-pressure gas, and the gas pressure is less than the minimum air pressure of the air spring; the high-pressure gas storage tank 14 stores high-pressure gas, and the gas pressure is greater than the maximum air pressure of the air spring.

[0201] When the air spring is exhausted, the exhaust can be directly discharged to the first air storage tank 13 through the control valve opening and closing combination and the pipeline setting, or the exhaust can be compressed by the compressor and discharged to the high-pressure air storage tank 14. One or both of these two circuits can be selected.

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

[0203] When the air spring is inflated, the control valve opening and closing combination, as well as the pipeline configuration, can be used to directly inflate the air from the high-pressure air tank 14, or the air can be compressed by the compressor in the first air tank 13. One or both of these two circuits can be selected. When both are selected, the inflation speed, i.e., the vehicle height lifting speed, can be significantly accelerated by properly setting the pressures in the first air tank 13 and the high-pressure air tank 14. When a very fast lifting speed is not required, such as when adjusting at high vehicle speeds, one or both circuits can be selected, and the vehicle height lifting speed can be reduced by properly setting the pressures in the first air tank 13 and the high-pressure air tank 14.

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

[0205] When the vehicle speed is lower than a preset value, the pressure difference is set to be larger, 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 by 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] In addition, it should be made clear that the present invention discloses multiple control valves. In specific implementation, the opening and closing of different control valves and the coordination between different control valves can change the flow direction of gas in the gas supply unit, and the different gas flow directions will bring different technical effects. When describing the above embodiments, only the main usage routes of the present invention are mainly stated, but the gas flow paths that are not disclosed are also within the scope of protection of the present invention. Because the essence of the present invention is to change the usage mode of the traditional gas supply system by optimizing gas pipelines, etc., the gas flow paths that are not specifically stated above should also be within the scope of protection of the present invention.

[0209] Obviously, the specific implementation of the present invention is not limited to the above-mentioned methods. As long as various non-substantial improvements are made using the method concept and technical solution of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A gas supply system, characterized in that: including 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; The first air storage unit and the second air storage unit can both 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. The gas supply system according to claim 1, characterized in that: The gas pressure in the first gas storage unit is no greater than the gas pressure in the second gas storage unit.

3. The gas supply system according to claim 2, characterized in that: The gas pressure in the first gas storage unit is lower than the lowest gas pressure in the air spring of the air spring assembly; the gas pressure in the second gas storage unit is higher than the highest gas pressure in the air spring of the air spring assembly.

4. The gas supply system according to claim 1, characterized in that: The gas supply system further includes a communication control unit, and the first gas storage unit and the second gas storage unit are connected via the communication control unit.

5. A gas supply system according to any one of claims 1 to 4, characterized in that: The gas supply system further comprises 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 end of the air supply unit is connected to the air spring control unit through the first control unit; the air outlet end of the air supply unit is connected to the air spring control unit through 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; The first control unit and the second control unit are each provided with at least one control valve.

6. The gas supply system according to claim 5, characterized in that: The air supply unit is connected to the second control unit through the drying unit; The air 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. The gas supply system according to claim 5, characterized in that: The air inlet end of the air supply unit is connected to the air supply unit; the air supply unit includes an air supply pipeline, and the end of the air supply pipeline away from the air supply unit is connected to a filter; a one-way valve is provided on the air supply pipeline; the air outlet end of the air supply unit is connected to the exhaust unit, and the exhaust unit includes an exhaust pipeline, and the exhaust pipeline is provided with a tenth control valve.

8. The gas supply system according to claim 5, characterized in that: 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. The gas supply system according to claim 5, characterized in that: The air pressure control unit further includes a detection unit connected to the first control unit; the detection unit includes a pressure sensor arranged on the first control unit.

10. An air spring system for a vehicle, characterized in that: It comprises an air spring assembly, which comprises a plurality of air springs; the air spring assembly is connected to the air supply system according to any one of claims 1 to 9.

Images