Fluid supply device, air spring assembly, suspension, vehicle and fluid supply method

Abstract

The embodiment of the invention provides a fluid supply device, an air spring assembly, a suspension, a vehicle and a fluid supply method, and the fluid supply device is used for supplying fluid to a moving part and comprises a first control valve, a first fluid source, a second fluid source and a power pump. The first control valve is used for being connected with a moving part; the first fluid source is used for containing fluid and connected with the first control valve. The second fluid source is used for containing fluid; the first end of the power pump is connected with the second fluid source, and the second end of the power pump is connected with the first fluid source and the first control valve. In the use process of the fluid supply device, use of a power pump can be reduced, and meanwhile work of the power pump can be reduced. In this way, noise and power consumption of the fluid supply device during working can be reduced, and meanwhile the working efficiency of the fluid supply device can be improved.

Description

Technical Field

[0001] This application relates to the field of fluid supply technology, and more particularly to a fluid supply device, air spring assembly, suspension, vehicle, and fluid supply method. Background Technology

[0002] Air springs are an important component in existing vehicles for adjusting ride height and ensuring stable vehicle operation. Typically, air springs are connected to a fluid supply system to obtain air or other fluids. Current fluid supply systems generally require a compressor to inflate the air springs, which generates significant energy consumption and noise during operation. This negatively impacts the user experience while driving and also affects the vehicle's range. Summary of the Invention

[0003] This application provides a fluid supply device, air spring assembly, suspension, vehicle, and fluid supply method, aiming to improve the technical problems of high power consumption and high energy consumption in the operation of existing fluid supply devices.

[0004] In a first aspect, embodiments of this application provide a fluid supply device for supplying fluid to a moving part, comprising: A first control valve is used to connect to the moving part; A first fluid source, which is used to contain the fluid, is connected to the first control valve; A second fluid source, the second fluid source being used to contain the fluid; A power pump, the first end of which is connected to the second fluid source, and the second end of which is connected to both the first fluid source and the first control valve.

[0005] The aforementioned fluid supply device can regulate the movement of the moving parts by opening and closing a first control valve, a first fluid source, a second fluid source, and a power pump. Specifically, when supplying fluid to the moving parts, the first fluid source and the first control valve can be opened, while the power pump and the second fluid source can be closed. Since the fluid pressure in the first fluid source is not less than the fluid pressure in the moving parts, the fluid in the first fluid source can spontaneously flow towards the moving parts under the action of the pressure difference. This process does not require the power pump to perform work, thus generating no noise or power consumption. In this process, the fluid can flow spontaneously based on the fluid pressure difference. Compared to the fluid overcoming the pressure difference under the action of a power pump, this results in a faster response speed and also improves the efficiency of the first fluid source in replenishing fluid to the moving parts.

[0006] If the pressure inside the first fluid source is insufficient, the first fluid source, the second fluid source, and the power pump can be turned on, while the first control valve can be closed. The second fluid source, through the power pump, allows fluid to flow into the first fluid source, ensuring sufficient pressure within the first fluid source to supply fluid to the moving parts. The fluid pressure in the second fluid source is greater than atmospheric pressure, which reduces the pressure difference between the second and first fluid sources, thereby reducing the power pump's power consumption. With the power pump's power remaining constant, the reduced pressure difference between the second and first fluid sources effectively shortens the pump's operating time, thus reducing pump noise and improving the efficiency of the second fluid source supplying fluid to the first fluid source.

[0007] When the moving part releases fluid, the first control valve, the power pump, and the second fluid source can be opened, while the first fluid source is closed. At this time, the fluid in the moving part can enter the second fluid source. During this process, the fluid pressure inside the moving part is generally higher than that in the second fluid source. The fluid can then flow naturally under the influence of the pressure difference, reducing the work done by the power pump and further lowering its power consumption and noise. Alternatively, the power pump can perform no work, simply connecting the second fluid source and the moving part, to avoid power consumption and noise. In this process, the fluid can flow spontaneously based on the pressure difference, which is faster than the fluid overcoming the pressure difference under the action of a power pump, and also improves the efficiency of fluid release from the moving part.

[0008] In rare cases where the pressure inside the first fluid source is insufficient, the second fluid source, power pump, and control valve can be activated, while the first fluid source is shut down. In this situation, the second fluid source can serve as a backup to supply fluid to the moving parts. On one hand, this improves the reliability of the fluid supply system. On the other hand, the activation of the second fluid source occurs in rare cases where the pressure inside the first fluid source is insufficient, meaning that the first fluid source has already supplied a certain amount of fluid to the moving parts before the second fluid source replenishes fluid to them. Compared to relying entirely on the second fluid source and power pump to supply fluid to the moving parts, this reduces the work done by the power pump, thereby reducing the power consumption and noise generated by the power pump.

[0009] In summary, fluid supply devices can reduce the use of power pumps and their workload during operation. This helps reduce noise and power consumption, and also improves the efficiency of the fluid supply device.

[0010] Optionally, the fluid supply device includes a controller, and the first fluid source and / or the second fluid source includes a second control valve. The controller is communicatively connected to the first control valve, the second control valve, and the power pump, respectively.

[0011] In the aforementioned fluid supply device, the first and second fluid sources can be opened and closed more reliably and easily based on the second control valve. Based on the controller, the fluid supply device can more conveniently and reliably control the first control valve, the second control valve, and the power pump. This helps ensure the accuracy, controllability, and reliability of the fluid supply device in performing actions such as supplying fluid to moving parts, replenishing fluid to the first fluid source, and releasing fluid to moving parts.

[0012] Optionally, the first fluid source includes a first sensor for detecting fluid pressure within the first fluid source; the second fluid source includes a second sensor for detecting fluid pressure within the second fluid source; and the controller is communicatively connected to the first sensor and the second sensor.

[0013] In the aforementioned fluid supply device, based on the first sensor, the controller can more accurately and conveniently acquire fluid pressure information from the first fluid source. Based on the second sensor, the controller can more accurately and conveniently acquire fluid pressure information from the second fluid source. This allows the controller to easily grasp the fluid pressure information from both the first and second fluid sources, thereby providing information for controlling the first control valve, the second control valve, and the power pump. This improves the accuracy and reliability of the fluid supply device in performing actions such as supplying fluid to moving parts, replenishing fluid to the first fluid source, and releasing fluid to moving parts.

[0014] Optionally, the fluid supply device includes a third control valve connected to the power pump.

[0015] In the aforementioned fluid supply device, based on the third control valve, the fluid within the moving parts can be directly discharged to the external environment via the third control valve. Specifically, at this time, the first and second fluid sources can be shut off within the fluid supply device, while the first and third control valves and the power pump are opened, allowing the fluid within the moving parts to be directly discharged to the external environment via the third control valve. On one hand, this allows for the regulation of the total fluid volume when there is excess fluid within the fluid supply device. On the other hand, during the aforementioned process, the fluid pressure within the moving parts is generally higher than the atmospheric pressure of the external environment. The fluid can then flow naturally under the influence of the pressure difference, reducing the work done by the power pump and further lowering its power consumption and noise. The power pump can even operate without performing any work, simply connecting the external environment and the moving parts to avoid power consumption and noise. Simultaneously, the fluid can flow spontaneously based on the pressure difference, which, compared to the fluid overcoming the pressure difference under the action of a power pump, results in a faster response speed and also improves the efficiency of fluid release from the moving parts.

[0016] Secondly, embodiments of this application provide an air spring assembly, the air spring assembly including an air spring and any of the fluid supply devices described in the first aspect, wherein the first control valve of the fluid supply device is connected to the air spring.

[0017] The air spring assembly employs the fluid supply device described in the first aspect, which reduces the work done by the power pump during the extension and retraction of the air spring. This helps to reduce noise and power consumption generated by the air spring assembly during air spring raising and lowering, and also improves the working efficiency of the air spring assembly when raising or lowering the vehicle body height.

[0018] Thirdly, embodiments of this application provide a suspension system, which includes the air spring assembly described in the second aspect.

[0019] The suspension employs the air spring assembly described in the second aspect. Benefiting from the reduced noise and power consumption during operation, the air spring assembly provides passengers with a quieter driving experience and also helps reduce power consumption when adjusting vehicle height and stability. Thanks to the improved efficiency of the air springs during operation, the suspension can more efficiently adjust the vehicle body; therefore, employing the air spring assembly described in the second aspect also improves the overall adjustability of the suspension.

[0020] Fourthly, embodiments of this application provide a vehicle, the vehicle including the suspension described in the third aspect.

[0021] The vehicle employs the suspension described in the third aspect. Benefiting from reduced suspension noise, the vehicle provides a quieter driving experience and prevents suspension noise from affecting the driver's concentration. Reduced power consumption during suspension operation also significantly improves the vehicle's range. Furthermore, increased suspension efficiency enhances handling and stability. This improves the vehicle's ability to respond quickly to complex road conditions such as potholes and rough surfaces, while also ensuring a comfortable driving experience for the user in challenging environments.

[0022] Fifthly, embodiments of this application provide a fluid supply method, the fluid supply method being used in any of the fluid supply devices described in the first aspect, comprising: Read the status value, wherein the status value includes a first status value, a second status value, and a third status value; Based on the state value, the fluid supply device is adjusted to one of the first mode, the second mode, and the third mode; The first mode includes activating the first control valve and the first fluid source, shutting off the second fluid source and the power pump, and supplying the fluid to the moving part using the first fluid source; or, activating the first control valve, the power pump and the second fluid source, shutting off the first fluid source, and supplying the fluid to the moving part through the second fluid source and the power pump. The second mode includes activating the second fluid source, the power pump, and the first fluid source, shutting down the first control valve, and replenishing the fluid to the first fluid source through the second fluid source and the power pump; The third mode includes activating the second fluid source, the power pump, and the first control valve, and shutting off the first fluid source so that the moving part releases the fluid to the second fluid source.

[0023] Based on the above fluid supply method, the fluid supply device can achieve three different operating modes: a first mode, a second mode, and a third mode. In the first mode, the first fluid source and the first control valve can be turned on, while the power pump and the second fluid source are turned off, allowing the first fluid source to supply fluid to the moving part. Since the fluid pressure in the first fluid source is not less than the fluid pressure in the moving part, the fluid in the first fluid source can spontaneously flow towards the moving part under the action of the pressure difference. This process does not require the power pump to do work, thus generating no noise or power consumption. In the above process, the fluid can flow spontaneously based on the fluid pressure difference. Compared to the fluid overcoming the pressure difference under the action of the power pump, this results in a faster response speed and also improves the efficiency of the first fluid source replenishing fluid to the moving part.

[0024] In the second mode, the first fluid source, the second fluid source, and the power pump can be activated, while the first control valve is closed, allowing the second fluid source to replenish fluid to the first fluid source. The second fluid source, through the power pump's operation, allows fluid from the second fluid source to flow into the first fluid source, ensuring sufficient fluid pressure within the first fluid source to supply fluid to the moving parts. The fluid pressure in the second fluid source is greater than atmospheric pressure, thus reducing the pressure difference between the second and first fluid sources and consequently reducing the power pump's power consumption. With the power pump's power remaining constant, the reduced pressure difference between the second and first fluid sources effectively shortens the power pump's operating time, thereby reducing pump noise and improving the efficiency of replenishing fluid from the second fluid source to the first fluid source.

[0025] In the third mode, the first control valve, power pump, and second fluid source can be opened, while the first fluid source is closed. In this mode, the fluid in the moving parts can enter the second fluid source. During this process, the fluid pressure inside the moving parts is generally higher than that in the second fluid source. The fluid can then flow naturally under the pressure difference, reducing the work done by the power pump and further lowering its power consumption and noise. Alternatively, the power pump can perform no work, simply connecting the second fluid source and the moving parts to avoid power consumption and noise. In this process, the fluid can flow spontaneously based on the pressure difference, which is faster than the fluid overcoming the pressure difference under the action of a power pump. This also improves the efficiency of fluid release from the moving parts.

[0026] In the first mode, the second fluid source, power pump, and control valve can be activated, while the first fluid source can be shut down. In this case, the second fluid source can also serve as a backup to supply fluid to the moving parts. On one hand, this improves the reliability of the fluid supply device. On the other hand, the activation of the second fluid source occurs in rare cases where the internal pressure of the first fluid source is insufficient, meaning that the first fluid source has already supplied a certain amount of fluid to the moving parts before the second fluid source replenishes fluid to them. Compared to relying entirely on the second fluid source and power pump to supply fluid to the moving parts, this reduces the work done by the power pump, thereby reducing the power consumption and noise generated by the power pump.

[0027] In summary, by controlling the fluid supply device to enter the first, second, and third modes, the fluid supply device can reliably and accurately perform operations such as replenishing fluid to moving parts, replenishing fluid from the first fluid source, and releasing fluid to moving parts. This satisfies the adjustment needs of the moving parts while reducing the use of a power pump and its workload. This helps reduce noise and power consumption during operation and also improves the efficiency of the fluid supply device.

[0028] Optionally, adjusting the fluid supply device to one of the first mode, second mode, and third mode according to the state value includes: When the state value is the first state value, the fluid pressure in the first fluid source is detected; When the fluid pressure in the first fluid source is not less than the first preset value, the first fluid source and the first control valve are activated, and fluid is supplied to the moving part through the first fluid source. If the fluid pressure in the first fluid source is less than the first preset value, shut down the first fluid source and detect the fluid pressure in the second fluid source; When the fluid pressure in the second fluid source is not less than the second preset value, the second fluid source and the power pump are activated to supply the fluid to the moving part. If the fluid pressure in the second fluid source is less than the second preset value, shut down the first fluid source, the second fluid source, the power pump, and the first control valve.

[0029] In the aforementioned fluid supply method, when the state value is the first state value, the fluid supply device can be adjusted to the first mode. At this time, the fluid pressure within the first and second fluid sources can be identified to specifically select the object to which fluid is supplied to the moving part. If the fluid pressure inside the first fluid source is detected to be not less than a first preset value, it indicates that the fluid pressure within the first fluid source is sufficient. At this point, the first fluid source and the first control valve are opened, while the power pump and the second fluid source are closed, allowing the first fluid source to supply fluid to the moving part. Under the action of the pressure difference, the fluid in the first fluid source can spontaneously flow to the moving part. This process requires no work from the power pump, thus generating no noise or power consumption, and also improves the efficiency of the first fluid source replenishing fluid to the moving part.

[0030] If the fluid pressure inside the first fluid source is less than a first preset value, it indicates insufficient fluid pressure. At this point, the fluid pressure inside the second fluid source can be detected. If the fluid pressure inside the second fluid source is not less than a second preset value, it indicates sufficient fluid pressure. In this case, the second fluid source, power pump, and control valve are activated, while the first fluid source is closed, allowing fluid to be supplied to the moving part through the second fluid source. This improves the reliability of the fluid supply device. Furthermore, since the activation of the second fluid source occurs in rare cases where the pressure inside the first fluid source is insufficient, this means that a certain amount of fluid has already been supplied to the moving part by the first fluid source before the second fluid source replenishes fluid to it. Compared to relying entirely on the second fluid source and power pump to supply fluid to the moving part, this reduces the work done by the power pump, thereby reducing power consumption and noise. If both the first and second fluid sources have insufficient pressure, fluid supply to the moving part is stopped.

[0031] Optionally, adjusting the fluid supply device to one of the first mode, second mode, and third mode according to the state value includes: When the state value is the second state value, shut down the first fluid source, the second fluid source, the power pump, and the first control valve and maintain this for a first duration; If the first duration reaches a preset duration, the fluid pressure in the second fluid source is detected; If the fluid pressure in the second fluid source is less than the third preset value, continue to shut down the first fluid source, the second fluid source, the power pump, and the first control valve; When the fluid pressure in the second fluid source is not less than a third preset value, the first fluid source, the second fluid source, and the power pump are activated to replenish fluid to the first fluid source through the second fluid source and the power pump.

[0032] In the above fluid supply method, when the state value is the second state value, the fluid supply device can be adjusted to the second mode. At this time, the first fluid source, the second fluid source, the power pump, and the first control valve can be shut down and maintained for a first time. This ensures that the second mode of the fluid supply device can operate in a stable state, preventing the fluid supply device from being mistakenly adjusted to the first or second mode under external influences.

[0033] After the first preset time period is reached, the fluid pressure in the second fluid source is collected. If the fluid pressure in the second fluid source is not less than the third preset value, it indicates that the fluid pressure in the second fluid source is sufficient. At this time, the first fluid source, the second fluid source, and the power pump can be turned on, and the first control valve can be closed, so that the second fluid source can replenish fluid to the first fluid source. This ensures that the first fluid source has sufficient fluid pressure to supply fluid to the moving parts. Since the fluid pressure in the second fluid source is greater than atmospheric pressure, the pressure difference between the second and first fluid sources is reduced, which reduces the power consumption of the power pump. Under the premise that the power pump power remains unchanged, the working time of the power pump can also be effectively reduced due to the reduction of the pressure difference between the second and first fluid sources, thereby reducing the noise generated by the power pump and improving the efficiency of the second fluid source replenishing fluid to the first fluid source. If the fluid pressure in the second fluid source is less than the third preset value, it indicates that the fluid pressure in the second fluid source is insufficient. At this time, the first fluid source, the second fluid source, the power pump, and the first control valve should be turned off again.

[0034] Optionally, the fluid supply device includes a third control valve connected to the power pump; adjusting the fluid supply device to one of the first mode, second mode, and third mode according to the state value includes: When the state value is the third state value, the fluid pressure in the second fluid source is detected; When the fluid pressure in the second fluid source is less than the fourth preset value, the first fluid source is shut off, and the first control valve, the second fluid source, and the power pump are activated so that the moving part releases the fluid to the second fluid source. When the fluid pressure in the second fluid source is not less than the fourth preset value, the first fluid source and the second fluid source are shut down, and the power pump, the first control valve, and the third control valve are activated so that the moving part releases the fluid to the external environment.

[0035] In the above fluid supply method, when the state value is the third state value, the fluid supply device can be adjusted to the third mode. At this time, it can be detected whether the fluid pressure in the second fluid source is not less than the fourth preset value. If the fluid pressure in the second fluid source is less than the fourth preset value, it indicates that the fluid pressure in the second fluid source is insufficient. At this time, the first control valve, the power pump, and the second fluid source are opened, and the first fluid source is closed, so that the fluid in the moving part can enter the second fluid source. During this process, the fluid pressure in the moving part is generally higher than that in the second fluid source. At this time, the fluid can achieve natural flow under the action of pressure difference, which can reduce the work of the power pump and further reduce the power pump's power consumption and noise. The power pump can even not do any work, only achieving the effect of connecting the second fluid source and the moving part, to avoid generating power consumption and noise. In the above process, the fluid can flow spontaneously based on the fluid pressure difference. Compared with the fluid overcoming the pressure difference under the action of the power pump, this has a faster response speed and also helps to improve the efficiency of fluid release from the moving part.

[0036] If the fluid pressure in the second fluid source is not less than the fourth preset value, it indicates that the fluid pressure in the second fluid source is sufficient. Since the fluid in the second fluid source can replenish the first fluid source, the sufficient fluid pressure in the second fluid source also indicates that the fluid pressure in the first fluid source is sufficient. At this time, the first and second fluid sources can be shut off, and the power pump, the first control valve, and the third control valve can be activated to release fluid to the external environment through the moving parts, thereby preventing oversaturation of the fluid supply device. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of a fluid supply device provided in an embodiment of this application; Figure 2 This is a flowchart of a fluid supply method provided in an embodiment of this application; Figure 3 This is a flowchart of a fluid supply method provided in an embodiment of this application; Explanation of reference numerals in the attached figures: 1. Fluid supply device; 1a. Second control valve; 11. First control valve; 12. First fluid source; 121. First container; 13. Second fluid source; 131. Second container; 14. Power pump; 15. Third control valve; 2. Moving parts. Detailed Implementation

[0038] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0039] Air springs are an important component in existing vehicles for adjusting vehicle height and ensuring stable operation. Typically, air springs are connected to a fluid supply system to obtain air or other fluids. Existing fluid supply systems generally include open and closed types, both of which require a compressor to inflate the air spring during operation.

[0040] An open-type air spring typically consists of an air tank and a compressor, both of which are connected to the air spring. During operation, the air tank inflates the air spring, or the compressor pumps outside air into the air spring. Due to the significant pressure difference between the air spring and the outside atmosphere, the fluid supply device consumes relatively more energy and generates more noise during compressor operation, resulting in lower efficiency. This negatively impacts the user's driving experience and also affects the vehicle's range and handling performance.

[0041] A closed-loop system typically includes a gas tank and a compressor connected in series. The compressor pumps gas from the tank into the air spring, or pumps air from the air spring into the tank. In other words, the compressor needs to operate continuously during this process. This increases the energy consumption and noise of the fluid supply system, and also affects its efficiency.

[0042] To address the aforementioned problems, this application provides a fluid supply device 1, which supplies fluid to a moving part 2, comprising: A first control valve 11 is used to connect to the moving part 2; A first fluid source 12 is used to contain the fluid, and the first fluid source 12 is connected to the first control valve 11; The second fluid source 13 is used to contain the fluid; A power pump 14, the first end of which is connected to the second fluid source 13, and the second end of which is connected to both the first fluid source 12 and the first control valve 11.

[0043] Compared to existing air suspension systems, the fluid supply device 1 described in this application introduces a second fluid source 13. The fluid supply device 1 can regulate the movement of the moving part 2 by opening and closing the first control valve 11, the first fluid source 12, the second fluid source 13, and the power pump 14. Specifically, when supplying fluid to the moving part 2, the first fluid source 12 and the first control valve 11 can be opened, while the power pump 14 and the second fluid source 13 can be closed. Since the fluid pressure in the first fluid source 12 is not less than the fluid pressure in the moving part 2, the fluid in the first fluid source 12 can spontaneously flow to the moving part 2 under the action of the pressure difference. This process does not require the power pump 14 to perform work, thus generating no noise or power consumption. In the above process, the fluid can flow spontaneously based on the fluid pressure difference. Compared to the fluid overcoming the pressure difference under the action of the power pump 14, this results in a faster response speed and also improves the efficiency of the first fluid source 12 in replenishing fluid to the moving part 2. If the internal pressure of the first fluid source 12 is insufficient, the first fluid source 12, the second fluid source 13, and the power pump 14 can be turned on, while the first control valve 11 can be closed. The second fluid source 13 can use the power pump 14 to draw fluid from the second fluid source 13 into the first fluid source 12, ensuring sufficient fluid pressure within the first fluid source 12 to supply fluid to the moving part 2. The fluid pressure in the second fluid source 13 is greater than atmospheric pressure, which reduces the pressure difference between the second fluid source 13 and the first fluid source 12, thereby reducing the power consumption of the power pump 14. With the power of the power pump 14 remaining constant, the reduced pressure difference between the second fluid source 13 and the first fluid source 12 effectively shortens the operating time of the power pump 14, thereby reducing the noise generated by the power pump 14 and improving the efficiency of the second fluid source 13 in replenishing fluid to the first fluid source 12.

[0044] When the moving part 2 releases fluid, the first control valve 11, the power pump 14, and the second fluid source 13 can be opened, while the first fluid source 12 can be closed. At this time, the fluid in the moving part 2 can enter the second fluid source 13. During this process, the fluid pressure inside the moving part 2 is generally higher than that in the second fluid source 13. The fluid can then flow naturally under the influence of the pressure difference, which reduces the work done by the power pump 14, further reducing its power consumption and noise. Alternatively, the power pump 14 can even perform no work, simply connecting the second fluid source 13 and the moving part 2, thus avoiding power consumption and noise. In this process, the fluid can flow spontaneously based on the pressure difference, which is faster than the fluid overcoming the pressure difference under the action of the power pump 14, and also improves the efficiency of fluid release from the moving part 2.

[0045] In rare cases where the internal pressure of the first fluid source 12 is insufficient, the second fluid source 13, the power pump 14, and the control valve can be activated, while the first fluid source 12 is shut down. In this case, the second fluid source 13 can also serve as a backup to supply fluid to the moving part 2. On the one hand, this improves the reliability of the fluid supply device 1. On the other hand, the activation of the second fluid source 13 occurs in rare cases where the internal pressure of the first fluid source 12 is insufficient, meaning that the first fluid source 12 has already supplied a certain amount of fluid to the moving part 2 before the second fluid source 13 replenishes fluid to it. Compared to relying entirely on the second fluid source 13 and the power pump 14 to supply fluid to the moving part 2, this reduces the work done by the power pump 14, thereby reducing the power consumption and noise generated by the power pump 14.

[0046] The fluid supply device 1 described in this application regulates the movement of the moving part 2 by opening and closing a first control valve 11, a first fluid source 12, a second fluid source 13, and a power pump 14. Compared with the prior art, this reduces the number of control valves and simplifies the device structure, thus also reducing the structural cost of the fluid supply device 1 and simplifying its control method.

[0047] Example 1 In Embodiment 1 of this application, the fluid supply device 1 further includes a controller. One of the first fluid source 12 and the second fluid source 13 includes a second control valve 1a, and the controller is communicatively connected to the first control valve 11, the second control valve 1a, and the power pump 14, respectively. Specifically, the first fluid source 12 may include a first container 121 and a second control valve 1a, wherein the first container 121 contains a fluid such as gas or liquid. The second control valve 1a is connected to the opening of the first container 121 to enable or disable the connection between the first container 121 and the first control valve 11 and the power pump 14. Alternatively, the second fluid source 13 may include a second container 131 and a second control valve 1a, wherein the second container 131 contains a fluid such as gas or liquid. The second control valve 1a is connected to the opening of the second container 131 to enable or disable the connection between the second container 131 and the first control valve 11 and the power pump 14. Alternatively, both the first fluid source 12 and the second fluid source 13 may include a second control valve 1a. Specifically, the controller can be connected to the first control valve 11, the second control valve 1a, and the power pump 14 via wires to control them through electrical signal communication. Alternatively, the controller, the first control valve 11, the second control valve 1a, and the power pump 14 can integrate wireless communication modules such as Bluetooth and Wi-Fi, allowing the controller to control them via Bluetooth or Wi-Fi communication.

[0048] Based on the configuration of the second control valve 1a, the first fluid source 12 and the second fluid source 13 can achieve more reliable and easily controllable opening and closing. Based on the configuration of the controller, the fluid supply device 1 can more conveniently and reliably control the first control valve 11, the second control valve 1a, and the power pump 14. This helps to ensure the accuracy, controllability, and reliability of the fluid supply device 1 in performing actions such as supplying fluid to the moving part 2, replenishing fluid to the first fluid source 12, and releasing fluid to the moving part 2.

[0049] In Embodiment 1 of this application, the first fluid source 12 includes a first sensor for detecting the fluid pressure within the first fluid source 12. The second fluid source 13 includes a second sensor for detecting the fluid pressure within the second fluid source 13. Preferably, the first and second sensors are pressure sensors to directly acquire fluid pressure information from the first fluid source 12 and the second fluid source 13.

[0050] The controller is communicatively connected to the first and second sensors. Specifically, the controller can be connected to the first and second sensors via wires to exchange information through electrical signals. Alternatively, the controller, the first sensor, and the second sensor can integrate wireless communication modules such as Bluetooth or Wi-Fi, allowing the controller to exchange information with the first and second sensors via Bluetooth or Wi-Fi. Based on the information acquired by the first and second sensors, the controller specifically controls the first control valve 11, the second control valve 1a, and the power pump 14 to adjust the movement of the moving part 2.

[0051] Based on the first sensor, the controller can more accurately and conveniently collect fluid pressure information within the first fluid source 12. Based on the second sensor, the controller can more accurately and conveniently collect fluid pressure information within the second fluid source 13. This allows the controller to easily grasp the fluid pressure information within the first fluid source 12 and the second fluid source 13, thereby providing information convenience for the controller to control the first control valve 11, the second control valve 1a, and the power pump 14, and thus improving the accuracy and reliability of the fluid supply device 1 in performing actions such as supplying fluid to the moving part 2, replenishing fluid to the first fluid source 12, and releasing fluid to the moving part 2.

[0052] In Embodiment 1 of this application, the fluid supply device 1 includes a third control valve 15, which is connected to the power pump 14. Based on the third control valve 15, the fluid within the moving part 2 can be directly discharged to the external environment via the third control valve 15. Specifically, at this time, the first fluid source 12 and the second fluid source 13 can be closed within the fluid supply device 1, while the first control valve 11, the third control valve 15, and the power pump 14 can be opened, allowing the fluid within the moving part 2 to be directly discharged to the external environment via the third control valve 15. On one hand, this allows for the regulation of the total fluid volume when there is excess fluid within the fluid supply device 1. On the other hand, during the above process, the fluid pressure within the moving part 2 is generally higher than the atmospheric pressure of the external environment. At this time, the fluid can flow naturally under the influence of the pressure difference, thus reducing the work done by the power pump 14 and further reducing the power pump 14's power consumption and noise. The power pump 14 can even perform no work, only achieving the effect of connecting the external environment and the moving part 2, to avoid generating power consumption and noise. Meanwhile, the fluid can flow spontaneously based on the fluid pressure difference. Compared with the fluid overcoming the pressure difference under the action of the power pump 14, the response speed is faster and it is also beneficial to improve the efficiency of fluid release by the moving part 2.

[0053] For ease of understanding, this application's first embodiment describes the specific working process of the fluid supply device 1 in the context of a scenario where the moving part 2 is specifically an air spring in a vehicle. It should be emphasized that the moving part 2 described in this embodiment is not limited to an air spring, but can also be a hydraulic cylinder, pneumatic cylinder, or other device requiring fluid supply.

[0054] During vehicle operation, the user can send signals to the suspension system controller via the vehicle's central control system to actively adjust the height and stiffness of the air springs. Alternatively, the suspension system controller can also obtain vehicle attitude information through sensors such as height sensors and autonomously adjust the height and stiffness of the air springs. In this case, the suspension system controller sends an adjustment command to the fluid supply device 1. Upon receiving the command, the controller of the fluid supply device 1 reads its stored status values ​​and executes the corresponding operation.

[0055] When the state value is the first state value, the controller adjusts the fluid supply device 1 to the first mode. At this time, the first sensor detects the fluid pressure value inside the first fluid source 12 and feeds it back to the controller. The controller compares the fluid pressure value inside the first fluid source 12 with its own preset first value. If the fluid pressure inside the first fluid source 12 is not less than the first preset value, it means that the fluid pressure inside the first fluid source 12 is sufficient. The first preset value can be set according to actual needs, for example, the first preset value can be 17 bar, 18 bar, 19 bar, 20 bar, etc. At this time, the controller starts the first fluid source 12 and the first control valve 11, and shuts down the power pump 14 and the second fluid source 13, so that the first fluid source 12 can supply fluid to the moving part 2. Under the action of pressure difference, the fluid in the first fluid source 12 can spontaneously flow to the moving part 2. If the fluid pressure inside the first fluid source 12 is less than the first preset value, it means that the fluid pressure inside the first fluid source 12 is insufficient. At this time, the second sensor detects the fluid pressure value inside the second fluid source 13 and feeds it back to the controller. The controller compares the fluid pressure value inside the second fluid source 13 with its own preset second value. If the fluid pressure inside the second fluid source 13 is not less than the second preset value, it means that the fluid pressure inside the second fluid source 13 is sufficient. The second preset value can be set according to actual needs, for example, the second preset value can be 4 bar, 5 bar, 6 bar, etc. At this time, the controller starts the second fluid source 13, the power pump 14, and the control valve, and closes the first fluid source 12, so that the second fluid source 13 can be used as a backup to supply fluid to the moving part 2. If the fluid pressure inside both the first fluid source 12 and the second fluid source 13 is insufficient, the controller controls the closure of the first fluid source 12, the first control valve 11, the power pump 14, and the second fluid source 13.

[0056] When the status value is the second status value, the controller adjusts the fluid supply device 1 to the second mode. At this time, the first fluid source 12, the second fluid source 13, the power pump 14, and the first control valve 11 can be shut down and maintained for a first duration. This ensures that the second mode of the fluid supply device 1 operates in a stable state, preventing the fluid supply device 1 from being mistakenly adjusted to the first or second mode under external influences. The controller monitors the first duration. After the first duration reaches a preset duration, the controller can control the second sensor to detect the fluid pressure in the second fluid source 13 and then send the fluid pressure information from the second fluid source 13 to the controller. The preset duration can be set according to actual needs; for example, the preset duration can be 50 seconds, 60 seconds, 70 seconds, etc. The controller compares the fluid pressure information in the second fluid source 13 with a third preset value. The third preset value can be set according to actual needs; it can be the same as or different from the second preset value. If the fluid pressure in the second fluid source 13 is not less than the third preset value, it indicates that the fluid pressure in the second fluid source 13 is sufficient. At this time, the controller activates the first fluid source 12, the second fluid source 13, and the power pump 14, and closes the first control valve 11, so that the second fluid source 13 can replenish fluid to the first fluid source 12. The second fluid source 13 can use the power pump 14 to draw fluid from the second fluid source 13 into the first fluid source 12, ensuring sufficient fluid pressure in the first fluid source 12 to supply fluid to the moving part 2. If the fluid pressure in the second fluid source 13 is less than a third preset value, it indicates insufficient fluid pressure. In this case, the controller can shut down the first fluid source 12, the second fluid source 13, the power pump 14, and the first control valve 11.

[0057] When the state value is the third state value, the controller adjusts the fluid supply device 1 to the third mode. At this time, the second sensor detects the fluid pressure in the second fluid source 13 and sends the fluid pressure in the second fluid source 13 to the controller. The controller compares whether the fluid pressure in the second fluid source 13 is not less than a preset fourth value. The fourth preset value can also be set according to actual needs, and can be the same as or different from one of the second preset value or the third preset value. If the fluid pressure in the second fluid source 13 is less than the fourth preset value, it means that the fluid pressure in the second fluid source 13 is insufficient. At this time, the first control valve 11, the power pump 14, and the second fluid source 13 are opened, and the first fluid source 12 is closed, so that the fluid of the moving part 2 can enter the second fluid source 13. During this process, the fluid pressure in the moving part 2 is generally higher than that in the second fluid source 13. At this time, the fluid can flow naturally under the action of pressure difference. If the fluid pressure in the second fluid source 13 is not less than the fourth preset value, it means that the fluid pressure in the second fluid source 13 is sufficient. Since the fluid in the second fluid source 13 can replenish the first fluid source 12, the fluid pressure in the second fluid source 13 is sufficient, which also indicates that the fluid pressure in the first fluid source 12 is sufficient. At this time, the first fluid source 12 and the second fluid source 13 can be shut off, and the power pump 14, the first control valve 11, and the third control valve 15 can be activated to allow the moving part 2 to release fluid to the external environment, so as to avoid oversaturation of the fluid inside the fluid supply device 1.

[0058] It is important to emphasize that, in the embodiments described in this application, the total fluid volume in the first fluid source 12 and the second fluid source 13 is generally not less than the total fluid volume required to adjust the air spring. In other words, the first fluid source 12 and the second fluid source 13 can meet the air spring adjustment requirements on their own. Therefore, in most scenarios, the first fluid source 12 can meet the air spring adjustment requirements on its own. After the first fluid source 12 supplies fluid to the air spring, the second fluid source 13 can replenish the fluid to the first fluid source 12. When the air spring releases fluid, the fluid is then replenished into the second fluid source 13. This means that in most scenarios, the fluid circulates along the path from the first fluid source 12 to the air spring, from the second fluid source 13 to the first fluid source 12, and from the air spring to the second fluid source 13. In some scenarios, the first fluid source 12 may not be able to meet the air spring adjustment requirements, in which case the second fluid source 13 can serve as a backup to supply fluid to the air spring. In very rare scenarios, such as when the vehicle has been stored for a long time or when the vehicle has just left the factory, the total fluid volume inside the first fluid source 12 and the second fluid source 13 may be insufficient. At this time, the third control valve 15, the power pump 14, and the first fluid source 12 can be activated, while the first control valve 11 and the second fluid source 13 can be closed, so that the first fluid source 12 can directly obtain fluid from the external environment. If the total amount of fluid inside the first fluid source 12 and the second fluid source 13 is excessive, the fluid can be discharged into the external environment through the third control valve 15.

[0059] Example 2 Embodiment 2 of this application is a further extension based on Embodiment 1.

[0060] In the second embodiment described in this application, the fluid supply device 1 can also eliminate the need for a controller, and the first fluid source 12, the second fluid source 13, the first control valve 11, and the power pump 14 can be communicatively connected to an external control system. For example, in the scenario where the moving part 2 is the air spring of a vehicle, the first fluid source 12, the second fluid source 13, the first control valve 11, and the power pump 14 can be communicatively connected to the vehicle suspension controller, so that the vehicle suspension controller can directly control the operation of the fluid supply device 1.

[0061] Example 3 Embodiment 3 of this application is a further extension based on Embodiment 1.

[0062] In the third embodiment described in this application, the first fluid source 12 is an independent device, that is, the first fluid source 12 can be a container integrating a sensing unit and an opening / closing control unit. Similarly, the second fluid source 13 can also be an independent device, that is, the second fluid source 13 can be a container integrating a sensing unit and an opening / closing control unit. In this case, the controller can be directly communicatively connected to the first fluid source 12 and the second fluid source 13 to control the first fluid source 12 and the second fluid source 13 to perform actions.

[0063] Example 4 Embodiment 4 of this application is a further extension based on Embodiment 1.

[0064] In Embodiment 4 of this application, the first sensor and the second sensor can specifically be pressure sensors. In this case, the first sensor can directly acquire the fluid pressure data within the first fluid source 12 and feed it back to the controller. The second sensor can directly acquire the fluid pressure data within the second fluid source 13 and feed it back to the controller. In the scenario where the first fluid source 12 includes a first container 121 and a second control valve 1a, the first sensor can be integrated into the first container 121, or connected to the passage between the first container 121 and the second control valve 1a, or integrated into the second control valve 1a. Similarly, in the scenario where the second fluid source 13 includes a second container 131 and a second control valve 1a, the second sensor can be integrated into the second container 131, or connected to the passage between the second container 131 and the second control valve 1a, or integrated into the second control valve 1a.

[0065] Example 5 Embodiment 5 of this application is a further extension based on Embodiment 1.

[0066] In Embodiment 5 of this application, the first sensor and the second sensor can specifically be pressure sensors. In this case, the first sensor can collect pressure data within the first fluid source 12 and convert the pressure data into fluid pressure data, which is then fed back to the controller. The second sensor can collect pressure data within the second fluid source 13 and convert the pressure data into fluid pressure data, which is then fed back to the controller. In the scenario where the first fluid source 12 includes a first container 121 and a second control valve 1a, the first sensor can be integrated into the first container 121, or connected to the passage between the first container 121 and the second control valve 1a, or integrated into the second control valve 1a. Similarly, in the scenario where the second fluid source 13 includes a second container 131 and a second control valve 1a, the second sensor can be integrated into the second container 131, or connected to the passage between the second container 131 and the second control valve 1a, or integrated into the second control valve 1a.

[0067] This application provides a fluid supply method for the aforementioned fluid supply device 1, comprising: Read the status value, wherein the status value includes a first status value, a second status value, and a third status value (S10). Based on the state value, the fluid supply device 1 is adjusted to one of the first mode, the second mode, and the third mode (S20). The first mode includes activating the first control valve 11 and the first fluid source 12, shutting off the second fluid source 13 and the power pump 14, and supplying the fluid to the moving part 2 using the first fluid source 12; or, activating the first control valve 11, the power pump 14 and the second fluid source 13, shutting off the first fluid source 12, and supplying the fluid to the moving part 2 through the second fluid source 13 and the power pump 14. The second mode includes activating the second fluid source 13, the power pump 14, and the first fluid source 12, shutting off the first control valve 11, and replenishing the fluid to the first fluid source 12 through the second fluid source 13 and the power pump 14; The third mode includes activating the second fluid source 13, the power pump 14, and the first control valve 11, and shutting off the first fluid source 12, so that the moving part 2 releases the fluid to the second fluid source 13.

[0068] Based on the above fluid supply method, the fluid supply device 1 can realize three different operating modes: a first mode, a second mode, and a third mode. In the first mode, the first fluid source 12 and the first control valve 11 can be turned on, while the power pump 14 and the second fluid source 13 can be turned off, allowing the first fluid source 12 to supply fluid to the moving part 2. Since the fluid pressure in the first fluid source 12 is not less than the fluid pressure in the moving part 2, the fluid in the first fluid source 12 can spontaneously flow to the moving part 2 under the action of the pressure difference. This process does not require the power pump 14 to do work, and therefore does not generate noise or power consumption. In the above process, the fluid can flow spontaneously based on the fluid pressure difference. Compared with the fluid overcoming the pressure difference under the action of the power pump 14, this has a faster response speed and also helps to improve the efficiency of the first fluid source 12 in replenishing fluid to the moving part 2.

[0069] In the second mode, the first fluid source 12, the second fluid source 13, and the power pump 14 can be turned on, while the first control valve 11 is closed, allowing the second fluid source 13 to replenish fluid to the first fluid source 12. The second fluid source 13 can use the power pump 14 to draw fluid from the second fluid source 13 into the first fluid source 12, ensuring sufficient fluid pressure within the first fluid source 12 to supply fluid to the moving part 2. The fluid pressure within the second fluid source 13 is greater than atmospheric pressure, thus reducing the pressure difference between the second fluid source 13 and the first fluid source 12, thereby reducing the power consumption of the power pump 14. With the power of the power pump 14 remaining constant, the reduced pressure difference between the second fluid source 13 and the first fluid source 12 effectively shortens the operation time of the power pump 14, thereby reducing the noise generated by the power pump 14 and improving the efficiency of the second fluid source 13 replenishing fluid to the first fluid source 12.

[0070] In the third mode, the first control valve 11, the power pump 14, and the second fluid source 13 can be opened, while the first fluid source 12 can be closed. At this time, the fluid in the moving part 2 can enter the second fluid source 13. During this process, the fluid pressure inside the moving part 2 is generally higher than that in the second fluid source 13. The fluid can then flow naturally under the pressure difference, reducing the work done by the power pump 14 and further lowering its power consumption and noise. Alternatively, the power pump 14 can perform no work, simply connecting the second fluid source 13 and the moving part 2, thus avoiding power consumption and noise. In the above process, the fluid can flow spontaneously based on the pressure difference. Compared to the fluid overcoming the pressure difference under the action of the power pump 14, this results in a faster response speed and also improves the efficiency of fluid release from the moving part 2.

[0071] In the first mode, the second fluid source 13, the power pump 14, and the control valve can be activated, while the first fluid source 12 can be shut down. In this case, the second fluid source 13 can also serve as a backup to supply fluid to the moving part 2. On the one hand, this improves the reliability of the fluid supply device 1. On the other hand, the activation of the second fluid source 13 occurs in rare cases where the internal pressure of the first fluid source 12 is insufficient, meaning that the first fluid source 12 has already supplied a certain amount of fluid to the moving part 2 before the second fluid source 13 replenishes fluid to it. Compared to relying entirely on the second fluid source 13 and the power pump 14 to supply fluid to the moving part 2, this reduces the work done by the power pump 14, thereby reducing the power consumption and noise generated by the power pump 14.

[0072] In summary, by controlling the fluid supply device 1 to enter the first, second, and third modes, the fluid supply device 1 can reliably and accurately perform operations such as replenishing fluid to the moving part 2, replenishing fluid to the first fluid source 12, and releasing fluid from the moving part 2. This satisfies the adjustment needs of the moving part 2 while reducing the use of the power pump 14 and its workload. This helps reduce noise and power consumption during operation of the fluid supply device 1, and also improves its working efficiency.

[0073] Example 1 In an embodiment of the fluid supply method described in this application, step S10: adjusting the fluid supply device 1 to one of a first mode, a second mode, and a third mode according to the state value, may specifically include: When the state value is the first state value, the fluid pressure in the first fluid source 12 is detected; When the fluid pressure in the first fluid source 12 is not less than the first preset value, the first fluid source 12 and the first control valve 11 are activated to supply fluid to the moving part 2 through the first fluid source 12. If the fluid pressure in the first fluid source 12 is less than the first preset value, the first fluid source 12 is shut off and the fluid pressure in the second fluid source 13 is detected. When the fluid pressure in the second fluid source 13 is not less than the second preset value, the second fluid source 13 and the power pump 14 are activated to supply the fluid to the moving part 2. If the fluid pressure in the second fluid source 13 is less than the second preset value, shut down the first fluid source 12, the second fluid source 13, the power pump 14, and the first control valve 11.

[0074] In the above fluid supply method, when the state value is the first state value, the fluid supply device 1 can be adjusted to the first mode. At this time, the object to which fluid is supplied to the moving part 2 can be specifically selected by identifying the fluid pressure in the first fluid source 12 and the second fluid source 13. If the fluid pressure inside the first fluid source 12 is detected to be not less than the first preset value, it indicates that the fluid pressure in the first fluid source 12 is sufficient. At this time, the first fluid source 12 and the first control valve 11 are opened, and the power pump 14 and the second fluid source 13 are closed, so that the first fluid source 12 can supply fluid to the moving part 2. Under the action of pressure difference, the fluid in the first fluid source 12 can spontaneously flow to the moving part 2. This process does not require the power pump 14 to do work, so there is no noise or power consumption, and it also helps to improve the efficiency of the first fluid source 12 in replenishing fluid to the moving part 2.

[0075] If the fluid pressure inside the first fluid source 12 is less than a first preset value, it indicates that the fluid pressure inside the first fluid source 12 is insufficient. At this time, the fluid pressure inside the second fluid source 13 can be detected. If the fluid pressure inside the second fluid source 13 is detected to be not less than a second preset value, it indicates that the fluid pressure inside the second fluid source 13 is sufficient. At this time, the second fluid source 13, the power pump 14, and the control valve are turned on, and the first fluid source 12 is turned off, so that fluid is supplied to the moving part 2 through the second fluid source 13. This improves the reliability of the fluid supply device 1. Furthermore, since the activation of the second fluid source 13 occurs in the rare cases where the internal pressure of the first fluid source 12 is insufficient, this means that before the second fluid source 13 replenishes fluid to the moving part 2, the first fluid source 12 has already replenished a certain amount of fluid into the moving part 2. Compared to relying entirely on the second fluid source 13 and the power pump 14 to supply fluid to the moving part 2, this reduces the work done by the power pump 14, thereby reducing the power consumption and noise generated by the power pump 14. If the pressure of both the first fluid source 12 and the second fluid source 13 is insufficient, the replenishment of fluid to the moving part 2 is stopped.

[0076] In an embodiment of the fluid supply method described in this application, step S10: adjusting the fluid supply device 1 to one of a first mode, a second mode, and a third mode according to the state value, may further include: When the state value is the second state value, shut down the first fluid source 12, the second fluid source 13, the power pump 14, and the first control valve 11 and maintain this for a first duration; If the first duration reaches a preset duration, the fluid pressure in the second fluid source 13 is detected; If the fluid pressure in the second fluid source 13 is less than the third preset value, continue to shut down the first fluid source 12, the second fluid source 13, the power pump 14, and the first control valve 11; When the fluid pressure in the second fluid source 13 is not less than the third preset value, the first fluid source 12, the second fluid source 13, and the power pump 14 are activated to replenish fluid to the first fluid source 12 through the second fluid source 13 and the power pump 14.

[0077] In the above fluid supply method, when the state value is the second state value, the fluid supply device 1 can be adjusted to the second mode. At this time, the first fluid source 12, the second fluid source 13, the power pump 14, and the first control valve 11 can be shut down and maintained for a first time. This ensures that the second mode of the fluid supply device 1 can operate in a stable state, preventing the fluid supply device 1 from being mistakenly adjusted to the first or second mode under external influences.

[0078] After the first preset time period is reached, the fluid pressure in the second fluid source 13 is collected. If the fluid pressure in the second fluid source 13 is not less than the third preset value, it indicates that the fluid pressure in the second fluid source 13 is sufficient. At this time, the first fluid source 12, the second fluid source 13, and the power pump 14 can be turned on, and the first control valve 11 can be closed, so that the second fluid source 13 can replenish fluid to the first fluid source 12. This ensures that the first fluid source 12 has sufficient fluid pressure to provide fluid to the moving part 2. Since the fluid pressure in the second fluid source 13 is greater than atmospheric pressure, the pressure difference between the second fluid source 13 and the first fluid source 12 is reduced, which reduces the power consumption of the power pump 14 when it is working. Under the premise that the power of the power pump 14 remains unchanged, the working time of the power pump 14 can also be effectively reduced due to the reduction of the pressure difference between the second fluid source 13 and the first fluid source 12, thereby reducing the noise generated by the power pump 14 and improving the efficiency of the second fluid source 13 replenishing fluid to the first fluid source 12. If the fluid pressure in the second fluid source 13 is less than the third preset value, it indicates that the fluid pressure in the second fluid source 13 is insufficient. At this time, the first fluid source 12, the second fluid source 13, the power pump 14 and the first control valve 11 should be shut down.

[0079] In an embodiment of the fluid supply method described in this application, step S10: adjusting the fluid supply device 1 to one of a first mode, a second mode, and a third mode according to the state value, may further include: When the state value is the third state value, it is detected whether the fluid pressure in the second fluid source 13 is not less than a fourth preset value; When the fluid pressure in the second fluid source 13 is less than the fourth preset value, the first fluid source 12 is shut off, and the first control valve 11, the second fluid source 13, and the power pump 14 are activated so that the moving part 2 releases the fluid to the second fluid source 13. When the fluid pressure in the second fluid source 13 is not less than the fourth preset value, the first fluid source 12 and the second fluid source 13 are shut down, and the power pump 14, the first control valve 11, and the third control valve 15 are activated so that the moving part 2 releases the fluid to the external environment.

[0080] In the above fluid supply method, when the state value is the third state value, the fluid supply device 1 can be adjusted to the third mode. At this time, it can be detected whether the fluid pressure in the second fluid source 13 is not less than the fourth preset value. If the fluid pressure in the second fluid source 13 is less than the fourth preset value, it indicates that the fluid pressure in the second fluid source 13 is insufficient. At this time, the first control valve 11, the power pump 14, and the second fluid source 13 are opened, and the first fluid source 12 is closed, so that the fluid of the moving part 2 can enter the second fluid source 13. During this process, the fluid pressure in the moving part 2 is generally higher than that in the second fluid source 13. At this time, the fluid can flow naturally under the action of the pressure difference, which can reduce the work done by the power pump 14, thereby further reducing the power consumption and noise of the power pump 14. The power pump 14 can even not do any work, only achieving the effect of connecting the second fluid source 13 and the moving part 2, to avoid generating power consumption and noise. In the above process, the fluid can flow spontaneously based on the fluid pressure difference. Compared with the fluid overcoming the pressure difference under the action of the power pump 14, the response speed is faster, and it is also beneficial to improve the efficiency of fluid release by the moving part 2.

[0081] If the fluid pressure in the second fluid source 13 is not less than the fourth preset value, it indicates that the fluid pressure in the second fluid source 13 is sufficient. Since the fluid in the second fluid source 13 can replenish the first fluid source 12, the sufficient fluid pressure in the second fluid source 13 also indicates that the fluid pressure in the first fluid source 12 is sufficient. At this time, the first fluid source 12 and the second fluid source 13 can be shut off, and the power pump 14, the first control valve 11, and the third control valve 15 can be activated to allow the moving part 2 to release fluid to the external environment, thereby preventing the fluid inside the fluid supply device 1 from becoming oversaturated.

[0082] This application also provides an air spring assembly, which includes an air spring and any of the fluid supply devices 1 described in the first aspect. The first control valve 11 of the fluid supply device 1 is connected to the air spring. By using the fluid supply device 1 described in the first aspect, the work done by the power pump 14 during the extension and retraction of the air spring can be reduced. This helps to reduce noise and power consumption during the raising and lowering of the air spring assembly, and also improves the efficiency of the air spring assembly when raising or lowering the vehicle body height.

[0083] This application also provides a suspension system including the air spring assembly described in the second aspect. By employing the air spring assembly described in the second aspect, the suspension benefits from reduced noise and power consumption during operation, providing passengers with a quieter driving experience. It also helps reduce power consumption when adjusting vehicle height and stability. Benefiting from the improved efficiency of the air springs during operation, the suspension can more efficiently adjust the vehicle body; therefore, employing the air spring assembly described in the second aspect also improves the overall adjustability of the suspension.

[0084] The suspension typically includes four air springs, which are preferably supplied with fluid by the same fluid supply device. During raising and lowering, it is preferable to raise and lower the two air springs located at the rear of the vehicle first, followed by the two air springs at the front. This facilitates a smoother lifting of the vehicle body and prevents the front of the vehicle from lifting up and obstructing the driver's view.

[0085] This application also provides a vehicle including the suspension described in the third aspect. By employing the suspension described in the third aspect, the vehicle offers a quieter driving experience due to reduced suspension operating noise, while also preventing suspension noise from affecting the driver's concentration. The reduced power consumption during suspension operation also significantly improves the vehicle's range. Furthermore, the increased efficiency of the suspension during operation enhances the vehicle's handling and stability. This improves the vehicle's ability to respond quickly to complex road conditions such as potholes and rough terrain, while also ensuring a better driving experience for the user in challenging road conditions.

[0086] In this application, the first fluid source 12 can be a component assembled from gas tanks, control valves, pressure sensors, etc., or it can be an independent container with opening / closing control and pressure detection. Similarly, the second fluid source 13 can be a component assembled from gas tanks, control valves, pressure sensors, etc., or it can be an independent container with opening / closing control and pressure detection. "Fluid" is a general term for substances with fluidity, such as liquids and gases, and does not refer to a specific gaseous or liquid substance. "Power pump 14" refers to a general term for devices that can provide power to a fluid, causing it to flow, and does not refer to a specific pump body. For example, when the fluid is specifically gaseous, the power pump 14 can be a compressor or an air pump; when the fluid is specifically liquid, the power pump 14 can be a liquid pump. The power pump 14 can simply provide fluid power without affecting the opening and closing of the fluid passage. Alternatively, the power pump 14 can also integrate a control valve to selectively or simultaneously achieve functions such as opening and closing the fluid passage and providing fluid flow power.

[0087] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0088] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0089] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0090] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, if the method includes steps A and B, it means that the method may include steps A and B performed sequentially, or it may include steps B and A performed sequentially. For example, if the method may also include step C, it means that step C may be added to the method in any order. For example, the method may include steps A, B, and C, or it may include steps A, C, and B, or it may include steps C, A, and B, etc.

[0091] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fluid supply device, characterized in that, The fluid supply device is used to supply fluid to the moving part (2), including: A first control valve (11) is used to connect to the moving part (2); A first fluid source (12) is used to contain the fluid, and the first fluid source (12) is connected to the first control valve (11); The second fluid source (13) is used to contain the fluid. A power pump (14) is provided, with its first end connected to the second fluid source (13) and its second end connected to both the first fluid source (12) and the first control valve (11).

2. The fluid supply device according to claim 1, characterized in that, The fluid supply device includes a controller, and the first fluid source (12) and / or the second fluid source (13) include a second control valve (1a). The controller is communicatively connected to the first control valve (11), the second control valve (1a), and the power pump (14), respectively.

3. The fluid supply device according to claim 2, characterized in that, The first fluid source (12) includes a first sensor for detecting the fluid pressure inside the first fluid source (12); the second fluid source (13) includes a second sensor for detecting the fluid pressure inside the second fluid source (13); the controller is communicatively connected to the first sensor and the second sensor.

4. The fluid supply device according to any one of claims 1-3, characterized in that, The fluid supply device includes a third control valve (15) which is connected to the power pump (14).

5. A type of air spring assembly, characterized in that, The air spring assembly includes an air spring and a fluid supply device (1) according to any one of claims 1-4, wherein the first control valve (11) of the fluid supply device (1) is connected to the air spring.

6. A suspension system, characterized in that, The suspension includes the air spring assembly as described in claim 5.

7. A vehicle, characterized in that, The vehicle includes the suspension as described in claim 6.

8. A fluid supply method, characterized in that, The fluid supply method is used in the fluid supply apparatus (1) according to any one of claims 1-4, comprising: Read the status value, wherein the status value includes a first status value, a second status value, and a third status value (S10). Based on the state value, the fluid supply device (1) is adjusted to one of the first mode, the second mode, and the third mode (S20). The first mode includes activating the first control valve (11) and the first fluid source (12), shutting off the second fluid source (13) and the power pump (14), and supplying the fluid to the moving part (2) using the first fluid source (12); or, activating the first control valve (11), the power pump (14) and the second fluid source (13), shutting off the first fluid source (12), and supplying the fluid to the moving part (2) through the second fluid source (13) and the power pump (14); The second mode includes activating the second fluid source (13), the power pump (14) and the first fluid source (12), shutting off the first control valve (11), and replenishing the fluid to the first fluid source (12) through the second fluid source (13) and the power pump (14); The third mode includes activating the second fluid source (13), the power pump (14), and the first control valve (11), and shutting off the first fluid source (12) so that the moving part (2) releases the fluid to the second fluid source (13).

9. The fluid supply method according to claim 8, characterized in that, Adjusting the fluid supply device (1) to one of the first mode, second mode, and third mode according to the state value includes: When the state value is the first state value, the fluid pressure in the first fluid source (12) is detected; When the fluid pressure in the first fluid source (12) is not less than the first preset value, the first fluid source (12) and the first control valve (11) are activated, and fluid is supplied to the moving part (2) through the first fluid source (12); If the fluid pressure in the first fluid source (12) is less than the first preset value, shut down the first fluid source (12) and detect the fluid pressure in the second fluid source (13); When the fluid pressure in the second fluid source (13) is not less than the second preset value, the second fluid source (13) and the power pump (14) are activated to supply the fluid to the moving part (2); If the fluid pressure in the second fluid source (13) is less than the second preset value, shut down the first fluid source (12), the second fluid source (13), the power pump (14), and the first control valve (11).

10. The fluid supply method according to claim 8, characterized in that, Adjusting the fluid supply device (1) to one of the first mode, second mode, and third mode according to the state value includes: When the state value is the second state value, shut down the first fluid source (12), the second fluid source (13), the power pump (14), and the first control valve (11) and maintain this for a first duration; If the first duration reaches a preset duration, the fluid pressure in the second fluid source (13) is detected; If the fluid pressure in the second fluid source (13) is less than the third preset value, the first fluid source (12), the second fluid source (13), the power pump (14) and the first control valve (11) shall continue to be shut down. When the fluid pressure in the second fluid source (13) is not less than the third preset value, the first fluid source (12), the second fluid source (13), and the power pump (14) are activated to replenish fluid to the first fluid source (12) through the second fluid source (13) and the power pump (14).

11. The fluid supply method according to claim 8, characterized in that, The fluid supply device (1) includes a third control valve (15), which is connected to the power pump (14); adjusting the fluid supply device (1) to one of the first mode, the second mode, and the third mode according to the state value includes: When the state value is the third state value, the fluid pressure in the second fluid source (13) is detected; When the fluid pressure in the second fluid source (13) is less than the fourth preset value, the first fluid source (12) is shut off, and the first control valve (11), the second fluid source (13), and the power pump (14) are activated so that the moving part (2) releases the fluid to the second fluid source (13); When the fluid pressure in the second fluid source (13) is not less than the fourth preset value, the first fluid source (12) and the second fluid source (13) are shut down, and the power pump (14), the first control valve (11), and the third control valve (15) are activated so that the moving part (2) releases the fluid to the external environment.

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