Air suspension closed type air supply system, control method and vehicle

Abstract

The invention belongs to the technical field of air suspension air supply, and particularly discloses an air suspension closed type air supply system, a control method and a vehicle. An air suspension closed air supply system includes an air supply assembly, a first air reservoir, a second air reservoir, and an air spring. The first air storage device and the second air storage device are both used for storing compressed air and connected with the air supply assembly. The air supply assembly inflates the first air storage device or the second air storage device, the first air storage device inflates the second air storage device through the air supply assembly, or the second air storage device inflates the first air storage device through the air supply assembly. The air spring is connected with the air supply assembly so that the air spring can exhaust air to the first air storage device and / or the second air storage device through the air supply assembly or the first air storage device and / or the second air storage device can inflate the air spring through the air supply assembly. According to the invention, the inflating and deflating speed can be increased.

Description

Technical Field

[0001] The invention belongs to the technical field of air suspension air supply, and in particular relates to an air suspension closed air supply system, a control method and a vehicle. Background Art

[0002] The air supply system of the air suspension supplies compressed gas to the air spring of the vehicle through the air supply assembly to cushion the vibration of the wheel. However, the air supply system in the related art usually has only one air tank, and the air is inflated through the air tank or the air spring is exhausted to the air tank, and the speed of inflation and exhaust is low. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides an air suspension closed air supply system, which can increase the speed of inflation and exhaust.

[0004] The embodiment of the present invention further provides a closed air supply control method for an air suspension.

[0005] An embodiment of the present invention further provides a vehicle.

[0006] The closed air supply system of an air suspension according to an embodiment of the present invention includes: an air supply component, which is connected to the atmosphere; a first air storage device and a second air storage device, both of which are used to store compressed air, and both of which are connected to the air supply component, so that the air supply component can inflate the first air storage device or the second air storage device, the first air storage device can inflate the second air storage device through the air supply component, or the second air storage device can inflate the first air storage device through the air supply component; an air spring, which is connected to the air supply component, so that the air spring can exhaust the air to the first air storage device and / or the second air storage device through the air supply component, or the first air storage device and / or the second air storage device can inflate the air spring through the air supply component.

[0007] It can be understood that in the present embodiment, by providing the first air storage device and the second air storage device, the first air storage device and the second air storage device can simultaneously supply air to the air spring through the air supply component, and the air spring can also exhaust air to the first air storage device and the second air storage device simultaneously through the air supply component, thereby improving the speed of inflation and exhaust of the air spring, and one of the first air storage device and the second air storage device can independently inflate the air spring through the air supply component, and the air spring can also independently exhaust air to one of the first air storage device and the second air storage device, thereby improving the flexibility of inflation and exhaust, which is conducive to expanding the scope of application.

[0008] In this embodiment, the air supply component includes: an air pump, the inlet of which is connected to the atmosphere; a first valve, a second valve and a third valve, the first valve being connected in series between the outlet of the air pump and the first air storage device; the second valve being connected in series between the outlet of the air pump and the second air storage device; the third valve being connected in series between the first valve and the outlet of the air pump, and between the second valve and the outlet of the air pump; a fourth valve, the fourth valve being connected in series between the air spring and the outlet of the air pump; a fifth valve, the fifth valve being connected in series between the first valve and the inlet of the air pump, and between the second valve and the inlet of the air pump; a sixth valve, the sixth valve being connected in series between the inlet of the air pump and the air spring; and a seventh valve, the seventh valve being connected in series between the sixth valve and the second air storage device, and between the fourth valve and the second air storage device.

[0009] In this embodiment, the air supply assembly further includes a dryer, which is connected in series between the outlet of the air pump and the first air storage device, and between the outlet of the air pump and the second air storage device.

[0010] In this embodiment, the air supply assembly further includes an eighth valve, which is a one-way shut-off valve. The eighth valve is connected in series between the dryer and the first valve, and between the dryer and the second valve.

[0011] In this embodiment, the air supply assembly further includes an exhaust pipeline and a ninth valve. One end of the exhaust pipeline is connected to the inlet of the dryer, and the ninth valve is arranged on the exhaust pipeline.

[0012] In this embodiment, the air supply assembly also includes a safety valve, the inlet of the safety valve is connected to the inlet of the air pump, the outlet of the safety valve is connected to the outlet of the air pump, and the pressure relief port of the safety valve is connected to the inlet of the air pump.

[0013] In this embodiment, the air suspension closed air supply system also includes a first pressure detection component and a second pressure detection component. The first pressure detection component is arranged in the first air storage device to obtain pressure information in the first air storage device, and the second pressure detection component is arranged in the second air storage device to obtain pressure information in the second air storage device.

[0014] The air suspension closed air supply control method in this embodiment is applied to the above-mentioned air suspension closed air supply system, and the control method includes: when inflation is required, controlling the air supply component to inflate the first air storage device or the second air storage device, or controlling the first air storage device and / or the second air storage device to inflate the air spring through the air supply component; when exhaust is required, controlling the air spring to exhaust the air to the first air storage device and / or the second air storage device through the air supply component; after the air spring is exhausted, controlling the first air storage device to inflate the second air storage device through the air supply component or controlling the second air storage device to inflate the first air storage device through the air supply component.

[0015] In this embodiment, the closed air supply control method of the air suspension also includes: after the air spring is exhausted, obtaining the pressure values ​​in the first air storage device and the second air storage device, and controlling the first air storage device to inflate the second air storage device through the air supply component or controlling the second air storage device to inflate the first air storage device through the air supply component according to the pressure values ​​in the first air storage device and the second air storage device.

[0016] The vehicle in this embodiment includes the above-mentioned air suspension closed air supply system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 4 is a schematic diagram of a closed air supply system for an air suspension according to an embodiment of the present invention.

[0018] Figure 2 It is a schematic diagram of the working mode of the closed air supply system of the air suspension according to the embodiment of the present invention for inflating the first air storage.

[0019] Figure 3 It is a schematic diagram of the working mode of the closed air supply system of the air suspension according to the embodiment of the present invention for inflating the second air storage.

[0020] Figure 4 It is a schematic diagram of a working mode of inflating an air spring by utilizing a first air storage device according to an embodiment of the present invention.

[0021] Figure 5 It is a schematic diagram of the working mode of inflating the air spring by using the second air storage device according to an embodiment of the present invention.

[0022] Figure 6 It is a schematic diagram of a working mode of using a first air storage device and a second air storage device to inflate an air spring simultaneously according to an embodiment of the present invention.

[0023] Figure 7It is a schematic diagram of the working mode of the air spring of an embodiment of the present invention for exhausting air into the first air storage.

[0024] Figure 8 It is a schematic diagram of the working mode of the air spring of an embodiment of the present invention for exhausting air to the second air storage.

[0025] Fig. 9 It is a schematic diagram of the working mode of the air spring of an embodiment of the present invention for exhausting air to the first air storage and the second air storage.

[0026] Fig.10 It is a schematic diagram of the working mode of charging the first air storage device to the second air storage device according to an embodiment of the present invention.

[0027] Fig.11 It is a schematic diagram of the working mode of the second air storage device charging the first air storage device according to an embodiment of the present invention.

[0028] Fig.12 It is a schematic diagram of the working mode of the first air storage device in an embodiment of the present invention for back-blowing the dryer.

[0029] Fig.13 It is a schematic diagram of the working mode of the second air storage device in an embodiment of the present invention for back-blowing the dryer.

[0030] Fig.14 It is a schematic diagram of the working mode of the first air storage and the second air storage for back-blowing the dryer in an embodiment of the present invention.

[0031] Fig.15 It is a schematic diagram of the working mode of the safety valve pressure relief according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] 1. Air supply assembly; 11. Air pump; 12. First valve; 13. Second valve; 14. Third valve; 15. Fourth valve; 16. Fifth valve; 17. Sixth valve; 18. Seventh valve; 19. Dryer; 110. Eighth valve; 111. Ninth valve; 112. Safety valve; 113. Filter; 114. Check valve; 2. First air storage; 3. Second air storage; 4. Air spring; 5. Tenth valve. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] In this embodiment, if Figure 1As shown, the air suspension closed air supply system includes an air supply component 1, a first air storage 2, a second air storage 3 and an air spring 4. The air supply component 1 is connected to the atmosphere. The first air storage 2 and the second air storage 3 are both used to store compressed air, and the first air storage 2 and the second air storage 3 are both connected to the air supply component 1, so that the air supply component 1 can inflate the first air storage 2 or the second air storage 3, the first air storage 2 can inflate the second air storage 3 through the air supply component 1, or the second air storage 3 can inflate the first air storage 2 through the air supply component 1. The air spring 4 is connected to the air supply component 1, so that the air spring 4 can exhaust the first air storage 2 and / or the second air storage 3 through the air supply component 1, or the first air storage 2 and / or the second air storage 3 can inflate the air spring 4 through the air supply component 1.

[0036] Specifically, the air supply assembly 1 can be selectively connected to the first air storage 2 and / or the second air storage 3. When the air supply assembly 1 is connected to the first air storage 2, the air supply assembly 1 can inflate the first air storage 2; when the air supply assembly 1 is connected to the second air storage 3, the air supply assembly 1 can inflate the second air storage 3; when the air supply assembly 1 is connected to both the first air storage 2 and the second air storage 3, the first air storage 2 and the second air storage 3 can inflate each other.

[0037] The air spring 4 can be selectively connected to the first air storage 2 and / or the second air storage 3 through the air supply assembly 1. When the air spring 4 is connected to the first air storage 2, the first air storage 2 can inflate the air spring 4, and the air spring 4 can also exhaust the air from the first air storage 2. The paths of the first air storage 2 inflate the air spring 4 and the air spring 4 exhaust the air from the first air storage 2 are different; when the air spring 4 is connected to the second air storage 3, the second air storage 3 can inflate the air spring 4, and the air spring 4 can also exhaust the air from the second air storage 3. The paths of the second air storage 3 inflate the air spring 4 and the air spring 4 exhaust the air from the second air storage 3 are different; when the air spring 4 is connected to both the first air storage 2 and the second air storage 3, the first air storage 2 and the second air storage 3 can inflate the air spring 4 at the same time, and the air spring 4 can also exhaust the air from the first air storage 2 and the second air storage 3 at the same time. The paths of the first air storage 2 and the second air storage 3 inflate the air spring 4 and the air spring 4 exhaust the air from the first air storage 2 and the second air storage 3 are different.

[0038] It can be understood that in the present embodiment, by providing the first air storage 2 and the second air storage 3, the first air storage 2 and the second air storage 3 can simultaneously supply air to the air spring 4 through the air supply component 1, and the air spring 4 can also exhaust air to the first air storage 2 and the second air storage 3 simultaneously through the air supply component 1, thereby improving the speed of inflation and exhaust of the air spring 4, and one of the first air storage 2 and the second air storage 3 can be independently inflated to the air spring 4 through the air supply component 1, and the air spring 4 can also be independently exhausted to one of the first air storage 2 and the second air storage 3, thereby improving the flexibility of inflation and exhaust, which is conducive to expanding the scope of application.

[0039] In this embodiment, if Figure 1 As shown, the air supply assembly 1 includes an air pump 11, a first valve 12, a second valve 13, a third valve 14, a fourth valve 15, a fifth valve 16, a sixth valve 17, and a seventh valve 18. The inlet of the air pump 11 is connected to the atmosphere; the first valve 12 is connected in series between the outlet of the air pump 11 and the first air storage 2; the second valve 13 is connected in series between the outlet of the air pump 11 and the second air storage 3; the third valve 14 is connected in series between the first valve 12 and the outlet of the air pump 11, and between the second valve 13 and the outlet of the air pump 11; the fourth valve 15 is connected in series between the air spring 4 and the outlet of the air pump 11; the fifth valve 16 is connected in series between the first valve 12 and the inlet of the air pump 11, and between the second valve 13 and the inlet of the air pump 11; the sixth valve 17 is connected in series between the inlet of the air pump 11 and the air spring 4; the seventh valve 18 is connected in series between the sixth valve 17 and the second air storage 3, and between the fourth valve 15 and the second air storage 3.

[0040] Specifically, the first valve 12, the second valve 13, the third valve 14, the fourth valve 15, the fifth valve 16, the sixth valve 17, and the seventh valve 18 are all reversing valves and are used to control the on and off of the gas circuit. Exemplarily, the first valve 12, the second valve 13, the third valve 14, the fourth valve 15, the fifth valve 16, the sixth valve 17, and the seventh valve 18 are all reversing valves. Of course, the types of the first valve 12, the second valve 13, the third valve 14, the fourth valve 15, the fifth valve 16, the sixth valve 17, and the seventh valve 18 are not intended to limit the present invention.

[0041] like Figure 1 As shown, the air suspension closed air supply system in this embodiment also includes a tenth valve 5, which is an air valve. The air spring 4 is provided with multiple valves, and each air spring 4 is connected in series with the tenth valve 5, which is an air valve. The tenth valve 5 is used to control the air intake or exhaust of the air spring 4 connected in series therewith.

[0042] like Figure 1As shown, the inlet end of the air pump 11 is connected to an air intake pipeline, which is in communication with the atmosphere so as to deliver external air to the system through the air intake pipeline. A filter 113 is provided on the air intake pipeline to filter the air entering the system to filter out particulate impurities in the air, prevent impurities from entering the system, and avoid wear or damage to the components in the system. On the air intake pipeline, a one-way valve 114 is provided downstream of the filter 113, and the one-way valve 114 can be provided to prevent the air in the system from being discharged to the outside through the air intake pipeline.

[0043] It should be noted that when it is necessary to charge the first air storage 2 from the atmosphere, Figure 2 As shown, the first valve 12 and the third valve 14 are opened, and external air is transported to the first air storage 2 through the air pump 11 via the third valve 14 and the first valve 12 .

[0044] When it is necessary to charge the second air storage 3 from the atmosphere, Figure 3 As shown, the third valve 14 and the second valve 13 are opened, and the external air is transported to the second air storage 3 through the air pump 11 via the third valve 14 and the second valve 13 .

[0045] When the air spring 4 needs to be inflated, the pressure P1 in the first air storage 2 and the pressure P2 in the second air storage 3 are detected before inflation. When P1-P2>a, where a is a calibration value, that is, the pressure in the first air storage 2 is relatively high, in order to increase the inflation speed, the air spring 4 can be inflated through the first air storage 2, such as Figure 4 As shown, the first valve 12, the fifth valve 16 and the fourth valve 15 need to be opened, and the air in the first air storage 2 is delivered to the air spring 4 through the first valve 12, the fifth valve 16, the air pump 11 and the fourth valve 15. When P2-P1>a, that is, the pressure in the second air storage 3 is relatively high, in order to increase the inflation speed, the air spring 4 can be inflated through the second air storage 3, such as Figure 5 As shown, the second valve 13, the fifth valve 16 and the fourth valve 15 need to be opened, and the air in the second air storage 3 is delivered to the air spring 4 through the second valve 13, the fifth valve 16, the air pump 11 and the fourth valve 15. When |P1-P2|<a, the pressure values ​​in the first air storage 2 and the second air storage 3 are close, and the air spring 4 can be inflated through the first air storage 2 and the second air storage 3 at the same time, as shown in FIG. Figure 6As shown, the first valve 12, the fifth valve 16, the seventh valve 18, the sixth valve 17 and the fourth valve 15 need to be opened during inflation. The air in the first air storage 2 passes through the first valve 12 and the fifth valve 16 to the air pump 11, and the air in the second air storage 3 passes through the seventh valve 18 and the sixth valve 17 to the air pump 11, and then passes through the air pump 11 and the fourth valve 15 to the air spring 4.

[0046] When the air spring 4 needs to be deflated, the pressure P1 in the first air storage 2 and the pressure P2 in the second air storage 3 are detected before deflation. When P2-P1>a, where a is a calibration value, that is, the pressure in the first air storage 2 is relatively low, in order to increase the deflation speed, the air should be deflated from the air spring 4 to the first air storage 2, such as Figure 7 As shown, when deflation is performed, the sixth valve 17, the third valve 14 and the first valve 12 are opened, and the gas in the air spring 4 enters the first air storage 2 through the sixth valve 17, the air pump 11, the third valve 14 and the first valve 12. When P1-P2>a, that is, the pressure in the second air storage 3 is relatively low, in order to increase the deflation speed, the air should be deflated from the air spring 4 to the second air storage 3, as shown in FIG. Figure 8 As shown, when deflation is performed, the sixth valve 17, the third valve 14 and the second valve 13 are opened, and the gas in the air spring 4 enters the second air storage 3 through the sixth valve 17, the air pump 11, the third valve 14 and the second valve 13. When |P1-P2|<a, the pressures in the first air storage 2 and the second air storage 3 are close, and the air spring 4 can deflate the first air storage 2 and the second air storage 3 at the same time. Fig. 9 As shown, when deflation occurs, the sixth valve 17, the third valve 14, the first valve 12 and the second valve 13 are opened, and after the gas in the air spring 4 passes through the sixth valve 17, the air pump 11 and the third valve 14, a part of the gas enters the first air storage 2 through the first valve 12, and the other part enters the second air storage 3 through the second valve 13.

[0047] Furthermore, after the air spring 4 is exhausted and will not be inflated again in a short period of time, it is necessary to compare the pressure P1 in the first air storage 2 and the pressure P2 in the second air storage 3, and then pump air from the lower pressure one to the higher pressure one, so as to increase the speed of the next inflation of the air spring 4. That is, when P2-P1>a, the air is inflated from the first air storage 2 to the second air storage 3, such as Fig.10As shown, at this time, the first valve 12, the fifth valve 16, the fourth valve 15 and the seventh valve 18 need to be opened. The air in the first air storage 2 passes through the first valve 12, the fifth valve 16, the air pump 11, the fourth valve 15 and the seventh valve 18. Since the air is charged from the low pressure to the high pressure, the air pump 11 must be turned on. When P1-P2>a, that is, the air is charged from the second air storage 3 to the first air storage 2, as shown in FIG. Fig.11 As shown, the seventh valve 18, the sixth valve 17, the third valve 14 and the first valve 12 need to be opened, and the air in the second air storage 3 is transported to the first air storage 2 through the seventh valve 18, the sixth valve 17, the air pump 11, the third valve 14 and the first valve 12. Similarly, the air pump 11 must be turned on.

[0048] In this embodiment, if Figure 1 As shown, the air supply assembly 1 further includes a dryer 19 , which is connected in series between the outlet of the air pump 11 and the first air storage 2 , and between the outlet of the air pump 11 and the second air storage 3 .

[0049] Specifically, the outlet of the air pump 11 is connected to the first delivery pipeline, and the outlet of the first delivery pipeline is connected to the first air storage 2 and the second air storage 3 through branch pipelines respectively. The first valve 12 is arranged on the branch pipeline connected to the first air storage 2, the second valve 13 is arranged on the branch pipeline connected to the second air storage 3, and the dryer 19 is arranged on the delivery pipeline.

[0050] It can be understood that by providing the dryer 19, and the dryer 19 is provided at the outlet of the air pump 11, the air entering the system from the outside can be dried, and the moisture in the air can be removed to prevent the moisture from causing damage to the components in the system, which is beneficial to extending the overall service life.

[0051] In this embodiment, if Figure 1 As shown, the air supply assembly 1 also includes an eighth valve 110 , which is a one-way shut-off valve. The eighth valve 110 is connected in series between the dryer 19 and the first valve 12 , and between the dryer 19 and the second valve 13 .

[0052] Specifically, the one-way shut-off valve is arranged on the conveying pipeline and is connected in series with the dryer 19 .

[0053] It can be understood that by setting a one-way throttle valve, the airflow can be prevented from flowing in the opposite direction, ensuring that the airflow can only pass in one direction. The speed of the airflow can also be adjusted, thereby controlling the action speed of the actuator, maintaining the stability of the fluid flow, and ensuring that the system can operate smoothly under different working conditions.

[0054] In this embodiment, if Figure 1As shown, the air supply assembly 1 also includes an exhaust pipeline and a ninth valve 111. One end of the exhaust pipeline is connected to the inlet of the dryer 19, and the ninth valve 111 is arranged on the exhaust pipeline.

[0055] It should be noted that, by setting the exhaust pipe and the ninth valve 111, the dryer 19 can be back-blown. Before back-blowing, the air pressure P1 in the first air storage 2 and the air pressure P2 in the second air storage 3 are detected. When P1-P2>a, where a is a set value, that is, the air pressure in the first air storage 2 is larger, the first air storage 2 is used to back-blow the dryer 19. Fig.12 As shown, when back-blowing, the first valve 12 and the ninth valve 111 are opened, and the air in the first air storage 2 is discharged after passing through the first valve 12, the eighth valve 110, the dryer 19 and the ninth valve 111. When P2-P1>a, the air pressure in the first air storage 2 is relatively large, and the second air storage 3 is used to back-blow the dryer 19. Fig.13 As shown, during back-blowing, when the second valve 13 and the ninth valve 111 are opened, the air in the second air storage 3 is discharged after passing through the second valve 13, the eighth valve 110, the dryer 19 and the ninth valve 111. When |P1-P2|<a, the pressure difference between the first air storage 2 and the second air storage 3 is small, and both can be used for back-blowing at the same time. Fig.14 As shown, during back-blowing, the first valve 12, the second valve 13, the eighth valve 110 and the ninth valve 111 are opened. The air in the first air storage 2 passes through the first valve 12 and the air in the second air storage 3 passes through the second valve 13, and the merged gas passes through the eighth valve 110, the dryer 19 and the ninth valve 111 and is discharged.

[0056] In this embodiment, if Figure 1 and Fig.15 As shown, the air supply assembly 1 also includes a safety valve 112 , the inlet of the safety valve 112 is connected to the inlet of the air pump 11 , the outlet of the safety valve 112 is connected to the outlet of the air pump 11 , and the pressure relief port of the safety valve 112 is connected to the inlet of the air pump 11 .

[0057] Specifically, the pressure relief port of the safety valve 112 is connected to between the filter 113 and the one-way valve 114 of the intake pipe.

[0058] It is understandable that when the pressure inside the system is too high, the safety valve 112 will automatically open to release air to the outside to reduce the pressure.

[0059] In this embodiment, the air suspension closed air supply system also includes a first pressure detection component and a second pressure detection component. The first pressure detection component is arranged in the first air storage 2 to obtain the pressure information in the first air storage 2, and the second pressure detection component is arranged in the second air storage 3 to obtain the pressure information in the second air storage 3.

[0060] Exemplarily, both the first pressure detecting member and the second pressure detecting member may be pressure sensors.

[0061] It can be understood that by setting a first pressure detection component in the first air storage 2 and a second pressure detection component in the second air storage 3, it is convenient to obtain the pressure information in the first air storage 2 and the second air storage 3, thereby facilitating the judgment of the pressure sizes in the first air storage 2 and the second air storage 3.

[0062] The closed air supply control method of the air suspension in this embodiment is applied to the above-mentioned closed air supply system of the air suspension, and the control method includes: when inflation is required, controlling the air supply component 1 to inflate the first air storage 2 or the second air storage 3, or controlling the first air storage 2 and / or the second air storage 3 to inflate the air spring 4 through the air supply component 1. When exhaust is required, controlling the air spring 4 to exhaust the air to the first air storage 2 and / or the second air storage 3 through the air supply component 1. After the air spring 4 is exhausted, controlling the first air storage 2 to inflate the second air storage 3 through the air supply component 1 or controlling the second air storage 3 to inflate the first air storage 2 through the air supply component 1.

[0063] Specifically, after obtaining the control instruction requiring inflation, the air supply component 1 can be controlled to supply air to the first air storage 2, or the air supply component 1 can be controlled to supply air to the second air storage 3. The first air storage 2 can be controlled to inflate the air spring 4 through the air supply component 1, or the second air storage 3 can be controlled to inflate the air spring 4 through the air supply component 1, or the first air storage 2 and the second air storage 3 can be controlled to inflate at the same time.

[0064] After obtaining the control instruction that the air spring 4 needs to be exhausted, the air spring 4 can be controlled to exhaust toward the first air storage 2, or the air spring 4 can be controlled to exhaust toward the second air storage 3 through the air supply component 1, or the air spring 4 can be controlled to exhaust toward the first air storage 2 and the second air storage 3 at the same time.

[0065] After the air spring 4 is exhausted, the first air storage 2 can be controlled to inflate the second air storage 3 through the air supply assembly 1 , and the second air storage 3 can also be controlled to inflate the first air storage 2 through the air supply assembly 1 .

[0066] The working mode of the air supply assembly 1 during inflation and exhaust is consistent with the working mode described in the above-mentioned air suspension closed air supply system, and will not be repeated here.

[0067] In this embodiment, the closed air supply control method of the air suspension also includes: after the air spring 4 is exhausted, obtaining the pressure values ​​in the first air storage 2 and the second air storage 3, and controlling the first air storage 2 to inflate the second air storage 3 through the air supply component 1 or controlling the second air storage 3 to inflate the first air storage 2 through the air supply component 1 according to the pressure values ​​in the first air storage 2 and the second air storage 3.

[0068] The conditions for controlling the first air storage 2 to inflate the second air storage 3 through the air supply component 1 according to the pressure values ​​in the first air storage 2 and the second air storage 3 or controlling the second air storage 3 to inflate the first air storage 2 through the air supply component 1 are consistent with the corresponding parts in the above-mentioned air suspension closed air supply system and will not be repeated here.

[0069] The vehicle in this embodiment includes the above-mentioned air suspension closed air supply system.

[0070] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0071] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A closed air supply system for an air suspension, characterized in that: include: An air supply assembly, the air supply assembly being in communication with the atmosphere; A first air storage device and a second air storage device, wherein the first air storage device and the second air storage device are both used to store compressed air, and the first air storage device and the second air storage device are both connected to the air supply assembly, so that the air supply assembly can inflate the first air storage device or the second air storage device, the first air storage device can inflate the second air storage device through the air supply assembly, or the second air storage device can inflate the first air storage device through the air supply assembly; An air spring connected to the air supply assembly so that the air spring can exhaust air into the first air storage device and / or the second air storage device through the air supply assembly or the first air storage device and / or the second air storage device can inflate air into the air spring through the air supply assembly.

2. The air suspension closed air supply system according to claim 1, characterized in that: The gas supply assembly comprises: an air pump, wherein the inlet of the air pump is connected to the atmosphere; A first valve, a second valve and a third valve, wherein the first valve is connected in series between the outlet of the air pump and the first air storage device; the second valve is connected in series between the outlet of the air pump and the second air storage device; the third valve is connected in series between the first valve and the outlet of the air pump, and between the second valve and the outlet of the air pump; a fourth valve, the fourth valve being connected in series between the air spring and an outlet of the air pump; a fifth valve, the fifth valve being connected in series between the first valve and the inlet of the air pump and between the second valve and the inlet of the air pump; a sixth valve, the sixth valve being connected in series between the inlet of the air pump and the air spring; A seventh valve is connected in series between the sixth valve and the second air storage device, and between the fourth valve and the second air storage device.

3. The air suspension closed air supply system according to claim 2, characterized in that: The air supply assembly further includes a dryer, which is connected in series between the outlet of the air pump and the first air storage, and between the outlet of the air pump and the second air storage.

4. The air suspension closed air supply system according to claim 3, characterized in that: The air supply assembly also includes an eighth valve, which is a one-way shut-off valve. The eighth valve is connected in series between the dryer and the first valve, and between the dryer and the second valve.

5. The air suspension closed air supply system according to claim 4, characterized in that: The air supply assembly also includes an exhaust pipeline and a ninth valve. One end of the exhaust pipeline is connected to the inlet of the dryer, and the ninth valve is arranged on the exhaust pipeline.

6. The air suspension closed air supply system according to claim 2, characterized in that: The air supply assembly also includes a safety valve, the inlet of the safety valve is connected to the inlet of the air pump, the outlet of the safety valve is connected to the outlet of the air pump, and the pressure relief port of the safety valve is connected to the inlet of the air pump.

7. The air suspension closed air supply system according to claim 1, characterized in that: It also includes a first pressure detecting component and a second pressure detecting component. The first pressure detecting component is arranged in the first air storage device to obtain pressure information in the first air storage device, and the second pressure detecting component is arranged in the second air storage device to obtain pressure information in the second air storage device.

8. A closed air supply control method for an air suspension, characterized in that: The air suspension closed air supply system applied to any one of claims 1 to 7, the control method comprising: When inflation is required, controlling the air supply assembly to inflate the first air storage device or the second air storage device, or controlling the first air storage device and / or the second air storage device to inflate the air spring through the air supply assembly; When exhaust is required, controlling the air spring to exhaust air to the first air storage and / or the second air storage through the air supply assembly; After the air spring is exhausted, the first air storage is controlled to inflate the second air storage via the air supply assembly, or the second air storage is controlled to inflate the first air storage via the air supply assembly.

9. The closed air supply control method for air suspension according to claim 8, characterized in that: Also includes: After the air spring is exhausted, the pressure values ​​in the first air storage device and the second air storage device are obtained, and according to the pressure values ​​in the first air storage device and the second air storage device, the first air storage device is controlled to inflate the second air storage device through the air supply component or the second air storage device is controlled to inflate the first air storage device through the air supply component.

10. A vehicle, characterized in that: The invention comprises the air suspension closed air supply system according to any one of claims 1 to 7.

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