Suspension system and vehicle

Abstract

The utility model provides a suspension system and a vehicle, the suspension system comprises a suspension device, the suspension device is provided with a fluid port, and when the fluid port is filled with fluid, the suspension device ascends; when fluid is discharged to the fluid port, the suspension device descends; the gas recovery unit is provided with a storage cavity, and the storage cavity is communicated with the fluid port; under the condition that the suspension device descends, the storage cavity is used for recycling fluid discharged from the fluid port, and the energy utilization rate of the suspension system is improved.

Description

Technical Field

[0001] The present application belongs to the field of suspension technology, and specifically, the present application relates to a suspension system and a vehicle. Background Art

[0002] In existing vehicle pneumatic systems, especially in models equipped with air suspension, when the suspension system is lowered to adjust the vehicle height, the compressed gas in the air spring is directly released into the external environment through the exhaust system. In this process, the energy contained in the compressed gas is directly dissipated into the air, which not only causes energy waste, but also may cause noise pollution and environmental pollution. Utility Model Content

[0003] An object of the present application is to provide a new technical solution for a suspension system and a vehicle.

[0004] According to a first aspect of the present application, there is provided a suspension system, comprising:

[0005] A suspension device, wherein the suspension device is provided with a fluid port, and when the fluid port is filled with fluid, the suspension device rises; when the fluid port is discharged from the fluid port, the suspension device descends;

[0006] a gas recovery unit having a storage chamber, the storage chamber being in communication with the fluid port;

[0007] When the suspension device is lowered, the storage chamber is used to recover the fluid discharged from the fluid port.

[0008] Optionally, the fluid is gas, and the suspension system further comprises:

[0009] A compression unit, wherein the compression unit is provided with a low-pressure chamber and a high-pressure chamber, wherein the low-pressure chamber is used to perform a first compression on the gas, and the high-pressure chamber is used to perform a second compression on the gas;

[0010] The gas recovery unit is in communication with the low-pressure stage chamber, and the high-pressure stage chamber is in communication with the fluid port.

[0011] Optionally, when the suspension device is raised, the fluid stored in the storage chamber can be input into the fluid port.

[0012] Optionally, the gas recovery unit includes a one-way valve, and the compression unit includes a second type of solenoid valve;

[0013] The one-way valve is connected to the outlet end of the storage chamber, the second type of solenoid valve is arranged between the one-way valve and the low-pressure chamber, and the fluid stored in the storage chamber is transmitted to the fluid port through the one-way valve and the second type of solenoid valve.

[0014] Optionally, the compression unit comprises a third type solenoid valve, and the third type solenoid valve is arranged between the high pressure stage chamber and the fluid port;

[0015] When the suspension device is raised, the third type solenoid valve is used to open the gas path between the high pressure stage chamber and the fluid port.

[0016] Optionally, the compression unit comprises a first gas circuit and a fourth type of solenoid valve, the first gas circuit is connected between the fluid port and the storage chamber, and the fourth type of solenoid valve is arranged in the first gas circuit and is used to control the on and off of the first gas circuit;

[0017] When the suspension device is lowered, the fourth type solenoid valve opens the first air path.

[0018] Optionally, the compression unit further includes:

[0019] A drying unit is connected to the output end of the high-pressure chamber to dry the fluid.

[0020] Optionally, the gas recovery unit further comprises:

[0021] A filter device, the filter device is connected to the input end of the low-pressure chamber to filter the fluid;

[0022] When the suspension device is raised, the compression unit is able to draw air through the filter device.

[0023] Optionally, the gas recovery unit further comprises:

[0024] A first pressure sensor is connected to the storage chamber to detect the fluid pressure in the storage chamber.

[0025] Optionally, the gas recovery unit further comprises:

[0026] A control valve is connected to the first pressure sensor and is used to control the on-off of a pipeline between the fluid port and the storage chamber.

[0027] Optionally, the gas recovery unit further comprises a filtering device, and the control valve is connected to the filtering device;

[0028] When the control valve disconnects the communication between the fluid port and the storage chamber, the fluid in the fluid port flows to the outside through the filter device.

[0029] Optionally, the suspension device comprises a control unit and an air spring unit, and the fluid port is connected to the air spring unit through the control unit;

[0030] When the control unit is turned on, the fluid in the air spring unit can flow out to the fluid port through the control unit, or the fluid in the fluid port can flow into the air spring unit through the fluid port.

[0031] Optionally, an accumulator is further included, the control unit includes an accumulator solenoid valve, and the accumulator is connected to the fluid port through the accumulator solenoid valve.

[0032] Optionally, a second pressure sensor is further included, wherein the second pressure sensor is connected to the fluid port and is used to detect the pressure of the fluid port.

[0033] According to a second aspect of the present application, a vehicle is provided, comprising the suspension system according to the first aspect.

[0034] The suspension system provided in the embodiment of the present application includes a suspension device, which is provided with a fluid port. When the fluid port is filled with fluid, the suspension device rises; when the fluid port is discharged from the fluid port, the suspension device descends; a gas recovery unit, the gas recovery unit has a storage chamber, and the storage chamber is connected to the fluid port; when the suspension device descends, the storage chamber is used to recover the fluid discharged from the fluid port, thereby improving the energy utilization rate of the suspension system.

[0035] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0037] Figure 1 A schematic diagram of a suspension system provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of a first fluid flow path when a suspension device of a suspension system provided by an embodiment of the present application is rising;

[0039] Figure 3 A schematic diagram of a second fluid flow path when a suspension device of a suspension system provided by an embodiment of the present application is raised;

[0040] Figure 4 A schematic diagram of a third fluid flow path when a suspension device of a suspension system provided by an embodiment of the present application is raised;

[0041] Figure 5 A schematic diagram of a first fluid flow path when a suspension device of a suspension system provided by an embodiment of the present application is lowered;

[0042] Figure 6 A schematic diagram of a second fluid flow path when a suspension device of a suspension system provided by an embodiment of the present application is lowered;

[0043] Figure 7 A schematic diagram of an accumulator of a suspension system provided in an embodiment of the present application during energy storage;

[0044] Figure 8 A schematic diagram of another suspension system provided in an embodiment of the present application;

[0045] Fig. 9 A schematic diagram of the fluid flow path when a suspension device of another suspension system provided in an embodiment of the present application is raised.

[0046] Reference numerals:

[0047] 1. Suspension system;

[0048] 26. Gas recovery unit; 21. Control valve; 22. Check valve; 23. Storage chamber; 24. First pressure sensor; 25. Filter device;

[0049] 27. Control unit; 7. First type solenoid valve; 8. First type solenoid valve; 9. First type solenoid valve; 10. First type solenoid valve; 11. Solenoid valve; 12. Second pressure sensor;

[0050] 28. Air spring unit; 2. Air spring; 3. Air spring; 4. Air spring; 5. Air spring;

[0051] 29. Compression unit; 14. Motor; 13. Low-pressure chamber; 15. High-pressure chamber; 19. Second-class solenoid valve; 16. Drying unit; 18a. Third-class solenoid valve; 18b. Fourth-class solenoid valve; 17. First gas path;

[0052] 6. Accumulator; 20. Second gas circuit. DETAILED DESCRIPTION

[0053] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0054] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0055] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0056] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0057] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0058] See also Figure 1 , an embodiment of the present application provides a suspension system 1 for a vehicle, the suspension system 1 comprising:

[0059] The suspension device is provided with a fluid port. When the fluid port is filled with fluid, the suspension device rises; when the fluid port is discharged with fluid, the suspension device falls;

[0060] A gas recovery unit 26, the gas recovery unit having a storage chamber 23, the storage chamber 23 is in communication with the fluid port;

[0061] When the suspension device is lowered, the storage chamber 23 is used to recover the fluid discharged from the fluid port.

[0062] In this embodiment, the suspension device is an important component of the vehicle, which connects the wheels and the vehicle body and plays the role of buffering, shock absorbing and supporting the vehicle.

[0063] The suspension device can achieve buffering and shock absorption through fluid pressure control. Specifically, it uses fluid (such as oil or gas) as a medium, adjusts the height and stiffness of the suspension by changing the pressure or volume of the fluid, and realizes dynamic adjustment of the suspension height to adapt to different driving conditions and driving needs.

[0064] The fluid port on the suspension device is an interface for filling or discharging fluid. When the fluid port is filled with fluid, the fluid enters a chamber or airbag in the suspension system, increasing its volume, thereby pushing the suspension device up. Conversely, when the fluid is discharged from the fluid port, the volume of the fluid in the suspension system decreases, causing the suspension device to descend.

[0065] The fluid-controlled suspension device can automatically adjust the suspension height according to driving conditions. For example, when driving at high speed, lowering the suspension height can improve the stability and handling of the vehicle; while in off-road or harsh road conditions, raising the suspension height can increase the vehicle's passability and comfort.

[0066] When the suspension device is lowered, the suspension system can perform exhaust or liquid discharge operations, and the storage chamber 23 is used to recover the fluid discharged from the fluid port, so that the compressed gas or high-pressure liquid discharged from the suspension system can be recovered into the storage chamber 23, avoiding the waste of energy carried by the compressed gas or high-pressure liquid, improving the energy utilization rate of the suspension system, and also reducing the noise pollution and environmental pollution of the suspension system.

[0067] The suspension system 1 provided in the embodiment of the present application includes a suspension device, which is provided with a fluid port. When the fluid port is filled with fluid, the suspension device rises; when the fluid port is discharged from the fluid port, the suspension device descends; a gas recovery unit 26, the gas recovery unit has a storage chamber 23, and the storage chamber 23 is connected to the fluid port; when the suspension device descends, the storage chamber 23 is used to recover the fluid discharged from the fluid port, thereby improving the energy utilization rate of the suspension system.

[0068] In one embodiment, see Figure 1 , the fluid is gas, and the suspension system also includes:

[0069] A compression unit 29, the compression unit is provided with a low-pressure chamber 13 and a high-pressure chamber 15, the low-pressure chamber 13 is used to compress the gas for the first time, and the high-pressure chamber 15 is used to compress the gas for the second time;

[0070] The gas recovery unit 26 is in communication with the low-pressure stage chamber 13 , and the high-pressure stage chamber 15 is in communication with the fluid port.

[0071] In this embodiment, when the storage chamber 23 of the gas recovery unit 26 recovers the gas discharged from the fluid port, the recovered gas can be used as power when the suspension device rises, thereby improving the energy utilization rate of the suspension system.

[0072] In one embodiment, the compression unit 29 also includes a motor 14, which is connected between the low-pressure chamber 13 and the high-pressure chamber 15. The motor 14 draws the gas recovered from the storage chamber 23 to the low-pressure chamber 13 for a first-stage compression, and then transports it to the high-pressure chamber 15 for a second-stage compression. The energy of the recovered gas is increased by two-stage compression of the gas. When the suspension device rises, the two-stage compressed gas can be transported to the suspension device. By increasing the output flow of the compression unit 29, the lifting rate or inflation rate of the suspension device is increased, thereby increasing the number of adjustable times of the suspension system.

[0073] In one embodiment, see Figures 2 to 4 When the suspension device rises, the fluid stored in the storage chamber 23 can be input into the fluid port to improve the energy utilization rate of the suspension system.

[0074] In one embodiment, the power for the suspension device to rise may all come from the fluid stored in the storage chamber 23. For example, the fluid stored in the storage chamber 23 is compressed after being output, and the compressed fluid is used to provide the power for the suspension device to rise.

[0075] In another embodiment, see Figure 2 and Figure 4 The suspension system can provide the power for the suspension device to rise by absorbing fluid from the outside. For example, the suspension system compresses the fluid absorbed from the outside and provides it to the suspension device; and the fluid stored in the storage chamber 23 can cooperate with the fluid absorbed from the outside to ensure the power for the suspension device to rise.

[0076] In this embodiment, see Figure 2 , the gas recovery unit 26 further includes a filtering device 25, which is connected to the input end of the low-pressure chamber 13 to filter the fluid;

[0077] When the suspension device is raised, the suspension system absorbs fluids such as air or liquid from the outside through the filter device 25. The filter device 25 filters and transports the fluid, which can ensure the stability of the suspension device while ensuring the cleanliness of the fluid.

[0078] In one embodiment, see Figure 1 , the gas recovery unit 26 includes a one-way valve 22, and the compression unit 29 includes a second type solenoid valve 19;

[0079] The one-way valve 22 is connected to the outlet end of the storage chamber 23 , and the second type solenoid valve 19 is arranged between the one-way valve 22 and the low-pressure chamber 13 . The fluid stored in the storage chamber 23 is transported to the fluid port through the one-way valve 22 and the second type solenoid valve 19 .

[0080] In this embodiment, the fluid stored in the storage chamber 23 is output to the compression unit 29 through the one-way valve 22 and the second type solenoid valve 19. The setting of the one-way valve 22 can ensure the one-way flow of the fluid, so that the fluid in the storage chamber 23 can flow to the low-pressure stage chamber 13 of the compression unit 29, while preventing the fluid compressed by the compression unit 29 from flowing to the storage chamber 23, thereby ensuring the stability of the compressed fluid in providing power for the suspension device to rise.

[0081] In one embodiment, see Figures 2 to 4 , the compression unit 29 includes a third type solenoid valve 18a, which is arranged between the high pressure stage chamber 15 and the fluid port;

[0082] When the suspension device is raised, the third type solenoid valve 18a is used to open the gas path between the high pressure stage chamber 15 and the fluid port.

[0083] In this embodiment, the third type solenoid valve 18a of the compression unit 29 is used to open the flow path of the compressed fluid to the fluid port when the suspension device is raised.

[0084] After the fluid is compressed in two stages through the low-pressure chamber 13 and the high-pressure chamber 15, the energy of the fluid is increased; when the compressed fluid does not reach the set energy, the third type of solenoid valve 18a can be in a disconnected state, and when the compressed fluid reaches the set energy, the third type of solenoid valve 18a can be turned on to ensure the lifting power of the suspension device through the fluid that reaches the set energy.

[0085] In one embodiment, see Figure 1 and Figure 5 The compression unit 29 includes a first gas circuit 17 and a fourth type solenoid valve 18b, the first gas circuit 17 is connected between the fluid port and the storage chamber 23, and the fourth type solenoid valve 18b is arranged in the first gas circuit 17 and is used to control the on and off of the first gas circuit 17;

[0086] When the suspension device is lowered, the fourth type solenoid valve 18 b opens the first air path 17 .

[0087] In this embodiment, when the suspension device descends, the fourth type of solenoid valve 18b can open the first air path 17, so that the compressed gas or high-pressure liquid discharged to the outside by the suspension system can be recovered into the storage chamber 23 through the first air path 17. The fluid in the storage chamber 23 can provide power when the suspension device rises, thereby improving the energy utilization rate of the suspension system.

[0088] In one embodiment, see Figure 1 , the compression unit 29 further comprises:

[0089] The drying unit 16 is connected to the output end of the high-pressure chamber 15 to dry the fluid.

[0090] In this embodiment, when compressed air is used to provide power for the suspension device to rise, the drying unit 16 can dry the compressed air, which ensures that impurities and moisture in the gas will not enter the suspension device, thereby ensuring the sensitivity and effectiveness of the suspension system in providing buffering.

[0091] In one embodiment, see Figure 1 , the gas recovery unit 26 further comprises:

[0092] The first pressure sensor 24 is connected to the storage chamber 23 to detect the fluid pressure in the storage chamber 23 .

[0093] In this embodiment, during the process of recovering the compressed gas or high-pressure liquid discharged from the suspension system into the storage chamber 23, the pressure of the fluid in the storage chamber 23 will gradually increase. In order to avoid excessive pressure in the storage chamber 23 on the basis of the fluid in the storage chamber 23 being able to provide the lifting power of the suspension device and to ensure the integrity and safety of the storage chamber 23, the fluid pressure in the storage chamber 23 can be detected by the first pressure sensor 24, and the flow path from the fluid port on the suspension device to the storage chamber 23 can be disconnected when the pressure in the storage chamber 23 reaches the set pressure.

[0094] In one embodiment, see Figure 1 and Figure 5 , the gas recovery unit 26 further comprises:

[0095] The control valve 21 is connected to the first pressure sensor 24 and is used to control the on-off of the pipeline between the fluid port and the storage chamber 23 .

[0096] In this embodiment, the control valve 21 can be a two-position three-way solenoid valve, and the control valve 21 has an on position and an off position. When the suspension device is lowered, the fluid discharged from the suspension system is recovered into the storage chamber 23 and the pressure of the fluid in the storage chamber 23 does not reach the set pressure, the control valve 21 is in the on position; when the fluid discharged from the suspension system is recovered into the storage chamber 23 and the pressure of the fluid in the storage chamber 23 reaches the set pressure, the control valve 21 is in the off position; or when the storage chamber 23 discharges the fluid through the one-way valve 22, the control valve 21 is in the off position to ensure the utilization efficiency of the fluid in the storage chamber 23.

[0097] In one embodiment, see Figure 1 and Figure 6 , the gas recovery unit 26 further includes a filtering device 25, and the control valve 21 is connected to the filtering device 25;

[0098] When the control valve disconnects the communication between the fluid port and the storage chamber 23 , the fluid in the fluid port flows to the outside through the filter device 25 .

[0099] In this embodiment, the control valve 21 includes a first conduction position and a second conduction position. When the suspension device descends and the fluid discharged from the suspension system is recovered into the storage chamber 23, the control valve 21 is in the first conduction position; when the first pressure sensor 24 monitors that the pressure of the fluid in the storage chamber 23 tends to be stable or reaches the set pressure, the control valve 21 is adjusted to the second conduction position, and the fluid in the fluid port is connected to the filter device 25 through the second conduction position, and the remaining fluid is discharged to the outside through the filter device 25 to avoid excessive pressure of the fluid in the storage chamber 23.

[0100] In another embodiment, see Figure 8 and Fig. 9The control valve 21 is a three-position four-way solenoid valve, and the control valve 21 includes a first conduction position 21a, a second conduction position 21b and a third conduction position 21c; during the process of the suspension device rising, the control valve 21 is in the first conduction position 21a, and the motor 14 drives the pistons of the low-pressure chamber 13 and the high-pressure chamber 15, thereby sucking the outside air through the control valve 21 and the filter device 25, and the filter device 25 can play a role in filtering impurities in the outside air. The sucked air enters the low-pressure chamber 13. During this process, the compressed gas of the accumulator 6 can pass through the first conduction position 21a of the control valve 21 to the storage chamber 23, and the storage chamber 23 originally has compressed gas. The second type of solenoid valve 19 is in the power-on position, so that the compressed gas in the accumulator 6 and the storage chamber 23 can pass through the one-way valve 22 and the second type of solenoid valve 19 to enter the low-pressure chamber 13. Due to the presence of the one-way valve in the low-pressure chamber 13, the gas will not escape to the outside. The motor drives the piston to compress the air in the low-pressure chamber 13 into the high-pressure chamber 15, and then the air enters the drying unit 16 through a second compression by the piston, thereby achieving the purpose of using the compressed pressure medium from the storage chamber 23, and the pressure medium enters the multi-stage supercharger to be compressed again. The drying unit can fully dry the moisture in the high-pressure air. Since the third type of solenoid valve 18a is in the reset state at this time, the compressed gas cannot pass through the first air path 17, and can only reach the control unit 27 through the second air path 20. In this case, according to the needs of the vehicle lifting suspension, the solenoid valve corresponding to the required air spring can be selected to energize to raise the air spring.

[0101] In one embodiment, when the control valve 21 is in the second conduction position 21b, the Figure 4 The flow control consistent with the lifting condition of the mid-suspension device and Figure 6 Consistent flow control for lowering conditions of the mid-suspension device.

[0102] In one embodiment, when the control valve 21 is in the third conduction position 21c, the Figure 5 Consistent flow control for lowering conditions of the mid-suspension device.

[0103] In one embodiment, see Figure 1 , the suspension device includes a control unit 27 and an air spring unit 28, and the fluid port is connected to the air spring unit 28 through the control unit 27;

[0104] When the control unit 27 is turned on, the fluid in the air spring unit 28 can flow out to the fluid port through the control unit 27 , or the fluid in the fluid port can flow into the air spring unit 28 through the fluid port.

[0105] In this embodiment, the control unit 27 includes a first type of solenoid valve 7, a first type of solenoid valve 8, a first type of solenoid valve 9 and a first type of solenoid valve 10; the air spring unit 28 includes an air spring 2, an air spring 3, an air spring 4 and an air spring 5, the first type of solenoid valve 7, the first type of solenoid valve 8, the first type of solenoid valve 9 and the first type of solenoid valve 10 are used to correspondingly control the on-off of the fluid in the air spring 2, the air spring 3, the air spring 4 and the air spring 5, and the deformation of the air spring 2, the air spring 3, the air spring 4 and the air spring 5 is used to achieve height adjustment of the suspension system.

[0106] There are three methods of flow control when the suspension device is raised.

[0107] See also Figure 2 In the first flow path control method, when the suspension device rises, the control valve 21 is in the non-powered position, and the motor 14 drives the pistons of the low-pressure chamber 13 and the high-pressure chamber 15, thereby sucking the outside air through the control valve 21 and the filter device 25, and the filter device 25 can filter the impurities in the outside air. When the sucked air enters the low-pressure chamber 13, the motor drives the piston to compress the air in the low-pressure chamber 13. Since the second-type solenoid valve 19 is in the non-powered position, the compressed gas cannot pass through the second-type solenoid valve 19, so that the compressed gas can only reach the high-pressure chamber 15, and then enter the drying unit 16 after the second compression by the piston in the high-pressure chamber 15. The drying unit 16 can fully dry the moisture in the high-pressure air. The third-type solenoid valve 18a and the fourth-type solenoid valve 18b together form a pilot solenoid valve. Since the third-type solenoid valve 18a is in the reset state at this time, the compressed gas cannot pass through the first gas path 17, but can only pass through the second gas path 20 to reach the control unit 27.

[0108] In this condition, the solenoid valves corresponding to the required air springs can be energized according to the needs of the vehicle lifting suspension. For example, energizing the first type solenoid valve 7 and the first type solenoid valve 8 can allow compressed gas to flow to air spring 2 and air spring 3, causing air spring 2 and air spring 3 to rise.

[0109] See also Figure 3 In the second flow path control method, the accumulator 6 is connected to the fluid port through the solenoid valve 11, so as to serve as an energy storage component of the suspension system, and a certain amount of compressed gas can be stored in the accumulator 6. In this case, the solenoid valve 11 is in the power-on position, and the compressed gas in the accumulator 6 enters the control unit 27, and the lifting of the air spring 2, the air spring 3, the air spring 4 and the air spring 5 is controlled by controlling the power-on state of the first type solenoid valve 7, the first type solenoid valve 8, the first type solenoid valve 9 and the first type solenoid valve 10.

[0110] See also Figure 4In the third flow path control method, the control valve 21 is in the non-powered position, and the motor 14 drives the pistons of the low-pressure chamber 13 and the high-pressure chamber 15, thereby sucking the outside air through the control valve 21 and the filter device 25. The filter device 25 can filter the impurities in the outside air. The sucked air enters the low-pressure chamber 13. During this process, a certain amount of compressed gas originally exists in the storage chamber 23. The second type of solenoid valve 19 is in the power-on position. The compressed gas in the storage chamber 23 enters the low-pressure chamber 13 through the one-way valve 22 and the second type of solenoid valve 19. Due to the presence of the one-way valve in the low-pressure chamber 13, the gas will not escape to the outside through the control valve 21. The motor drives the piston to compress the air in the low-pressure chamber 13 into the high-pressure chamber 15, and then the piston in the high-pressure chamber 15 compresses it for the second time and enters the drying unit 16, thereby achieving the purpose of using the compressed pressure medium from the storage chamber 23, and the pressure medium enters the multi-stage supercharger and is compressed again. The drying unit 16 can fully dry the moisture in the high-pressure air. Since the third type solenoid valve 18a is in the reset state at this time, the compressed gas cannot pass through the first gas path 17, and can only reach the control unit 27 through the second gas path 20. In this case, the solenoid valve corresponding to the required air spring can be energized according to the need of lifting the suspension of the vehicle. For example, energizing the first type solenoid valve 7 and the first type solenoid valve 8 can make the compressed gas flow to the air spring 2 and the air spring 3, so that the air spring 2 and the air spring 3 are lifted.

[0111] There are two methods of flow control when the suspension device is lowered.

[0112] See also Figure 5 The first flow path control method, at this time, the control valve 21 is in the power-on position, and the pilot solenoid valve 18b is in the power-on position. The first type solenoid valve 7, the first type solenoid valve 8, the first type solenoid valve 9 and the first type solenoid valve 10 are in the power-on position, and the high-pressure gas in the air spring unit 28 flows to the pilot valve 18b through the first type solenoid valve, so that the third type solenoid valve 18a is in the open state, and then flows from the second gas path 20 through the drying unit 16, and the moisture in the drying unit is blown away. Due to the presence of a one-way valve in the high-pressure stage chamber 15, the gas now flows from the first gas path 17 to the control valve 21 and then enters the storage chamber 23.

[0113] See also Figure 6 In the second flow path control method, when the gas continuously enters the storage chamber 23, until the pressure value read by the first pressure sensor 24 tends to be stable or reaches the set pressure, the control valve 21 is reset. At this time, the compressed gas flowing into the storage chamber 23 can only be discharged to the outside through the reset channel of the control valve 21 and the filter device 25.

[0114] In one embodiment, see Figure 7The suspension system further includes an accumulator 6 , and the control unit 27 includes an accumulator solenoid valve 11 , through which the accumulator 6 is connected to the fluid port.

[0115] In this embodiment, when charging the accumulator 6 , gas outside the suspension system may be drawn into the compression unit 29 , and then the gas is compressed in the compression unit 29 and then charged into the accumulator 6 .

[0116] See also Figure 7 , the control valve 21 is in the non-powered position, and the motor 14 drives the pistons of the low-pressure chamber 13 and the high-pressure chamber 15, thereby sucking the outside air through the control valve 21 and the filter device 25. After the sucked air enters the low-pressure chamber 13 and the high-pressure chamber 15, it enters the drying unit 16 after secondary compression. Since the third type solenoid valve 18a is in the reset state at this time, the compressed gas cannot pass through the first gas path 17, and the compressed gas reaches the control unit 27 through the second gas path 20. At this time, the solenoid valve 11 is in the power-on position, and the compressed gas enters the accumulator 6 through the solenoid valve 11 to realize the function of charging and storing energy.

[0117] In one embodiment, see Figure 1 , the suspension system further includes a second pressure sensor 12 , which is connected to the fluid port and is used to detect the pressure of the fluid port.

[0118] In this embodiment, the second air path 20 is connected to the compression unit 29 and the fluid port, so as to deliver the fluid compressed by the compression unit 29 to the fluid port to ensure the lifting stability of the suspension device. The second pressure sensor 12 can detect the pressure of the fluid port in real time. When the pressure of the fluid port reaches a level that can achieve the lifting of the suspension device, the control unit 27 is turned on to introduce the fluid of the fluid port into the air spring unit 28.

[0119] An embodiment of the present application provides a vehicle, which includes the above-mentioned suspension system.

[0120] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A suspension system, characterized in that: include: A suspension device, wherein the suspension device is provided with a fluid port, and when the fluid port is filled with fluid, the suspension device rises; when the fluid port is discharged from the fluid port, the suspension device descends; A gas recovery unit (26), the gas recovery unit having a storage chamber (23), the storage chamber (23) being in communication with the fluid port; When the suspension device is lowered, the storage chamber (23) is used to recover the fluid discharged from the fluid port.

2. The suspension system according to claim 1, characterized in that: The fluid is gas, and the suspension system further comprises: A compression unit (29), wherein the compression unit is provided with a low-pressure chamber (13) and a high-pressure chamber (15), wherein the low-pressure chamber (13) is used to perform a first compression on the gas, and the high-pressure chamber (15) is used to perform a second compression on the gas; The gas recovery unit (26) is in communication with the low-pressure stage chamber (13), and the high-pressure stage chamber (15) is in communication with the fluid port.

3. The suspension system according to claim 2, characterized in that: When the suspension device is raised, the fluid stored in the storage chamber (23) can be input into the fluid port.

4. The suspension system according to claim 3, characterized in that: The gas recovery unit (26) includes a one-way valve (22), and the compression unit (29) includes a second type solenoid valve (19); The one-way valve (22) is connected to the outlet end of the storage chamber (23), and the second type solenoid valve (19) is arranged between the one-way valve (22) and the low-pressure chamber (13). The fluid stored in the storage chamber (23) is transmitted to the fluid port through the one-way valve (22) and the second type solenoid valve (19).

5. The suspension system according to claim 3, characterized in that: The compression unit (29) comprises a third type solenoid valve (18a), and the third type solenoid valve (18a) is arranged between the high pressure stage chamber (15) and the fluid port; When the suspension device is raised, the third type solenoid valve (18a) is used to open the air path between the high pressure stage chamber (15) and the fluid port.

6. The suspension system according to claim 3, characterized in that: The compression unit (29) comprises a first gas circuit (17) and a fourth type solenoid valve (18b), wherein the first gas circuit (17) is connected between the fluid port and the storage chamber (23), and the fourth type solenoid valve (18b) is arranged on the first gas circuit (17) and is used to control the opening and closing of the first gas circuit (17); When the suspension device is lowered, the fourth type solenoid valve (18b) opens the first air path (17).

7. The suspension system according to claim 2, characterized in that: The compression unit (29) further comprises: A drying unit (16) is connected to the output end of the high-pressure chamber (15) to dry the fluid.

8. The suspension system according to claim 2, characterized in that: The gas recovery unit (26) further comprises: A filter device (25), the filter device being in communication with an input end of the low-pressure chamber (13) for filtering the fluid; When the suspension device is raised, the compression unit is able to draw air through the filter device (25).

9. The suspension system according to claim 1, characterized in that: The gas recovery unit (26) further comprises: A first pressure sensor (24) is connected to the storage chamber (23) and is used to detect the fluid pressure in the storage chamber (23).

10. The suspension system according to claim 9, characterized in that The gas recovery unit (26) further comprises: A control valve (21), which is connected to the first pressure sensor (24) and is used to control the on-off of the pipeline between the fluid port and the storage chamber (23).

11. The suspension system according to claim 10, characterized in that The gas recovery unit (26) further comprises a filtering device (25), and the control valve (21) is connected to the filtering device (25); When the control valve (21) disconnects the communication between the fluid port and the storage chamber (23), the fluid in the fluid port flows to the outside through the filter device (25).

12. The suspension system according to claim 2, characterized in that: The suspension device comprises a control unit (27) and an air spring unit (28), wherein the fluid port is connected to the air spring unit (28) through the control unit (27); When the control unit (27) is turned on, the fluid in the air spring unit (28) can flow out to the fluid port through the control unit (27), or the fluid in the fluid port can flow into the air spring unit (28) through the fluid port.

13. The suspension system according to claim 12, characterized in that The utility model also comprises an accumulator (6), the control unit (27) comprises an accumulator solenoid valve (11), and the accumulator (6) is connected to the fluid port through the accumulator solenoid valve (11).

14. The suspension system according to claim 1, characterized in that The invention also comprises a second pressure sensor (12), which is connected to the fluid port and is used to detect the pressure of the fluid port.

15. A vehicle, characterized in that: A suspension system comprising any one of claims 1-14.

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