Tire and air spring inflation and deflation system, vehicle and control method of vehicle

Abstract

The invention relates to the field of automobiles, in particular to an inflation and deflation system for tires and air springs, a vehicle and a control method of the vehicle. The inflation and deflation system for the tire and the air spring comprises an air pump, a pressure buffer tank, a two-position three-way valve, a tire unit, an air spring unit, a control unit and an air release valve, a first port of the air pump is communicated with the pressure buffer tank, a second port of the air pump is communicated with the air release valve, and a first port of the two-position three-way valve is communicated with the pressure buffer tank. A second port of the two-position three-way valve is communicated with the air spring unit, a third port of the two-position three-way valve is communicated with the tire unit, and the control unit is in electric signal connection with the air pump and the two-position three-way valve. According to the inflating and deflating system for the tire and the air spring, the vehicle and the control method of the vehicle, one air pump can be used for inflating and deflating the tire and the air spring, the problems that the functions of a tire pressure detection system and the air pump of the air spring are separated, and hardware resources are wasted are solved, the vehicle cost can be reduced, and the vehicle system integration degree can be improved.

Description

Technical Field

[0001] This application relates to the automotive field, and more specifically, to a tire and air spring inflation / deflation system, a vehicle, and a method for controlling the same. Background Technology

[0002] Traditional vehicle tire pressure monitoring systems and air spring suspension systems typically employ a functionally separate design. The tire pressure monitoring system only provides passive monitoring; when it detects abnormal tire pressure (such as too low or too high), it alerts the driver via the dashboard, requiring manual operation of an external air pump to inflate or deflate the tires. The air spring pump, on the other hand, independently serves suspension height adjustment, changing the internal pressure of the air springs by inflating or deflating them to adjust the vehicle's height. These two systems are independent at the hardware level, with no overlap in control logic, leading to redundant hardware resource allocation and poor functional synergy. Summary of the Invention

[0003] To address the aforementioned problems, this invention proposes a tire and air spring inflation / deflation system, a vehicle, and a control method thereof, thereby solving or at least mitigating one or more of the aforementioned problems and other issues present in the prior art.

[0004] This invention provides a tire and air spring inflation / deflation system. The system includes an air pump, a pressure buffer tank, a two-position three-way valve, a tire unit, an air spring unit, a control unit, and a deflation valve. The first port of the air pump is connected to the pressure buffer tank, the second port of the air pump is connected to the deflation valve, the first port of the two-position three-way valve is connected to the pressure buffer tank, the second port of the two-position three-way valve is connected to the air spring unit, and the third port of the two-position three-way valve is connected to the tire unit. The control unit is electrically connected to the air pump and the two-position three-way valve.

[0005] Optionally, the air pump includes a first air pump switching valve and a second air pump switching valve. The air inlet of the first air pump switching valve is connected to the air pump outlet pipe. The air outlet of the first air pump switching valve is connected to the pressure buffer tank and the air inlet of the second air pump switching valve. The air outlet of the second air pump switching valve is connected to the vent valve.

[0006] Optionally, the control unit is communicatively connected to a pressure sensor and a driving mode sensor.

[0007] Optionally, the tire unit further includes one or more tire valves, one end of which is connected to the third port of the two-position three-way valve, and the other end of which is connected to the corresponding tire.

[0008] Optionally, the air spring unit further includes one or more air spring valves, one end of which is connected to the second port of the two-position three-way valve, and the other end of which is connected to the corresponding air spring.

[0009] Optionally, the control unit is also electrically connected to the tire valve and the air spring valve.

[0010] The present invention also provides a vehicle comprising the above-described tire and air spring inflation / deflation system.

[0011] This invention also provides a method for controlling the inflation and deflation of tires and air springs, applied to a control unit. The method includes: acquiring tire pressure, air spring pressure, and pressure buffer tank pressure; acquiring the vehicle's driving mode and vehicle speed; when the tire pressure is within a preset pressure range, acquiring a target air spring pressure based on the driving mode, and controlling whether an air pump inflates or deflates the air spring based on the target air spring pressure and the air spring pressure; when the tire pressure is not within the preset pressure range, acquiring a target tire pressure based on the tire pressure, the pressure buffer tank pressure, and the vehicle speed, and controlling an air pump and a two-position three-way valve to inflate or deflate the tire based on the target tire pressure and the tire pressure.

[0012] Optionally, when the tire pressure is within a preset pressure range, the step of obtaining the target air spring pressure according to the driving mode, and controlling whether the air pump inflates or deflates the air spring based on the target air spring pressure and the air spring pressure, includes: controlling the air pump to inflate the air spring when the target air spring pressure is greater than the air spring pressure, and the absolute difference between the target air spring pressure and the air spring pressure is greater than or equal to a first preset pressure; and controlling the air pump to inflate the air spring when the target air spring pressure is greater than the air spring pressure, and the absolute difference between the target air spring pressure and the air spring pressure is greater than or equal to a first preset pressure. When the absolute difference between the target air spring pressure and the target air spring pressure is not greater than or equal to the first preset pressure, the air pump is controlled not to charge or deflate the air spring; when the target air spring pressure is less than the target air spring pressure and the absolute difference between the target air spring pressure and the target air spring pressure is greater than or equal to the second preset pressure, the air pump is controlled to deflate the air spring; when the target air spring pressure is less than the target air spring pressure and the absolute difference between the target air spring pressure and the target air spring pressure is not greater than or equal to the second preset pressure, the air pump is controlled not to charge or deflate the air spring.

[0013] Optionally, when the tire pressure is not within a preset pressure range, the step of obtaining a target tire pressure based on the tire pressure, the pressure buffer tank pressure, and the vehicle speed, and controlling an air pump and a two-position three-way valve to inflate or deflate the tire based on the target tire pressure and the tire pressure, includes: obtaining a first target tire pressure based on the tire pressure and the pressure buffer tank pressure; obtaining a correction coefficient based on the vehicle speed; obtaining the target tire pressure based on the first target tire pressure and the correction coefficient; controlling the air pump and the two-position three-way valve to inflate the tire when the target tire pressure is greater than the tire pressure; and controlling the air pump and the two-position three-way valve to deflate the tire when the target tire pressure is not greater than the tire pressure.

[0014] The tire and air spring inflation / deflation system, vehicle, and control method provided by this invention intelligently coordinate the working and connection states of the air pump and the connection state of the two-position three-way valve through the control unit. This enables the use of a single air pump to inflate and deflate the tires and air springs, solving the problem of separating the functions of the tire pressure monitoring system and the air spring pump, which leads to wasted hardware resources. This reduces vehicle costs and improves the integration of the vehicle system. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the tire and air spring inflation / deflation system according to the first embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the air pump structure according to the first embodiment of the present invention.

[0018] Figure 3 This is a schematic diagram of the air circuit connection between the tire unit and the air spring unit according to the second embodiment of the present invention.

[0019] Figure 4 This is a circuit connection diagram of the tire unit and the air spring unit according to the second embodiment of the present invention.

[0020] Figure 5 This is a flowchart of a tire and air spring inflation / deflation control method according to an embodiment of the present invention.

[0021] Reference numerals: 1-Tire and air spring inflation / deflation system; 2-Pressure sensor; 3-Driving mode sensor; 11-Air pump; 12-Pressure buffer tank; 13-Two-position three-way valve; 14-Tire unit; 15-Air spring unit; 16-Control unit; 17-Break valve; 18-Gas pipe; 111-First air pump switch valve; 112-Second air pump switch valve; 113-Air pump outlet pipe; 141-First tire valve; 142-Second tire valve; 143-Third tire valve; 144-Fourth tire valve; 145-First tire; 146-Second tire; 147-Third tire; 148-Fourth tire; 151-First air spring valve; 152-Second air spring valve; 153-Third air spring valve; 154-Fourth air spring valve; 155-First air spring; 156-Second air spring; 157-Third air spring; 158-Fourth air spring. Detailed Implementation

[0022] Referring to the accompanying drawings and specific embodiments, the structure, composition, features, and advantages of the solenoid valve core of the present invention will be described below by way of example; however, all descriptions should not be construed as limiting the present invention in any way.

[0023] Furthermore, for any single technical feature described or implied in the embodiments mentioned herein, or any single technical feature shown or implied in the various figures, the present invention still allows for any combination or deletion of these technical features (or their equivalents) without any technical obstacle, and thus these further embodiments according to the present invention should also be considered within the scope of this description.

[0024] It should also be noted that the terms "inner" and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship of the solenoid valve core and its components shown in the accompanying drawings. They are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0026] like Figure 1As shown, in the first embodiment, the tire and air spring inflation / deflation system 1 of the present invention includes an air pump 11, a pressure buffer tank 12, a two-position three-way valve 13, a tire unit 14, an air spring unit 15, a control unit 16, and a deflation valve 17. The pressure buffer tank 12 is a gas pressure buffer tank capable of bidirectional airflow, the two-position three-way valve 13 is a two-position three-way valve capable of bidirectional airflow, and the deflation valve 17 is a pressure relief valve or a back pressure valve, preferably a back pressure valve.

[0027] The air pump 11 has two air inlets. The first inlet of the air pump 11 is connected to the pressure buffer tank 12, so that the air pump 11 can both output gas to the pressure buffer tank 12 and receive gas output from the pressure buffer tank 12. The second inlet of the air pump 11 is connected to the vent valve 17, so that the air pump 11 can output gas to the vent valve 17 and discharge the output gas to the atmosphere through the vent valve 17.

[0028] The two-position three-way valve 13 has three vents. The first vent of the two-position three-way valve 13 is connected to the pressure buffer tank 12, allowing gas in the pressure buffer tank 12 to flow to the second or third vent of the two-position three-way valve 13. The second vent of the two-position three-way valve 13 is connected to the air spring unit 15, allowing gas in the pressure buffer tank 12 to flow to the air spring unit 15, or gas in the air spring unit 15 to flow to the pressure buffer tank 12. The third vent of the two-position three-way valve 13 is connected to the tire unit 14, allowing gas in the pressure buffer tank 12 to flow to the tire unit 14, or gas in the tire unit 14 to flow to the pressure buffer tank 12, when the two-position three-way valve 13 is switching modes. In the default state, default mode, or non-energized mode, the first and second vents of the two-position three-way valve 13 are connected. When the two-position three-way valve 13 is switching states, switching modes, or energized mode, the first and third vents are connected.

[0029] like Figure 2 As shown, the air pump 11 includes a first air pump switch valve 111 and a second air pump switch valve 112. The air inlet of the first air pump switch valve 111 is connected to the air pump outlet pipe 113, and the air outlet of the first air pump switch valve 111 is connected to the pressure buffer tank 12 and the air inlet of the second air pump switch valve 112. The air inlet of the second air pump switch valve 112 is connected to the air outlet of the first air pump switch valve 111 and the pressure buffer tank 12, and the air outlet of the second air pump switch valve 112 is connected to the vent valve (17). The first air pump switch valve 111 and the second air pump switch valve 112 are normally closed valves and will not open when not energized. When the air pump 11 starts supplying air, it will energize the first air pump switch valve 111.

[0030] The control unit 16 is connected to the external pressure sensor 2 and driving mode sensor 3. The pressure sensor 2 can acquire the tire pressure, air spring pressure and pressure buffer tank pressure, and send the tire pressure, air spring pressure and pressure buffer tank pressure to the control unit 16. The driving mode sensor 3 can acquire the vehicle's driving mode and speed, and send the driving mode and speed to the control unit 16.

[0031] When the air spring unit 15 needs to be inflated, the control unit 16 controls the air pump 11 to start supplying air and opens the first air pump switch valve 111. The compressed air pressurized by the air pump 11 will pass through the first air pump switch valve 111, the pressure buffer tank 12, and the two-position three-way valve 13 in sequence, and finally be delivered to the air spring unit 15 to inflate the air spring.

[0032] When the air spring unit 15 needs to be deflated, the control unit 16 controls the air pump 11 to stop supplying air and opens the second air pump switch valve 112. At this time, the high-pressure gas in the air spring unit 15 will pass through the two-position three-way valve 13, the pressure buffer tank 12, and the second air pump switch valve 112 in sequence, and finally be discharged into the atmosphere through the vent valve 17 to achieve the deflation of the air spring.

[0033] When the tire unit 14 needs to be inflated, the control unit 16 controls the air pump 11 to start supplying air, opens the first air pump switch valve 111, and controls the two-position three-way valve 13 to switch to the state where the first port and the third port are connected (power-on mode). The compressed air pressurized by the air pump 11 will pass through the first air pump switch valve 111, the pressure buffer tank 12, and the two-position three-way valve 13 in sequence, and finally be delivered to the tire unit 14 to inflate the tire.

[0034] When tire unit 14 needs to be deflated, control unit 16 controls air pump 11 to stop supplying air, opens second air pump switch valve 112, and controls two-position three-way valve 13 to switch to the state where the first port and the third port are connected (power-on mode). At this time, the high-pressure gas in tire unit 14 will pass through two-position three-way valve 13, pressure buffer tank 12, and second air pump switch valve 112 in sequence, and finally be discharged into the atmosphere through vent valve 17 to realize the deflation of tire pressure.

[0035] When neither the air spring unit 15 nor the tire unit 14 needs to be inflated or deflated, the control unit 16 controls the air pump 11 to stop working. At this time, the air passage between the air pump 11 and each unit is cut off to maintain the air pressure of the air spring unit 15 and the tire unit 14.

[0036] like Figure 3 , Figure 4As shown, in the second embodiment, the tire unit 14 includes at least two of the following: a first tire valve 141, a second tire valve 142, a third tire valve 143, a fourth tire valve 144, a first tire 145, a second tire 146, a third tire 147, and a fourth tire 148; one end of the first tire valve 141, the second tire valve 142, the third tire valve 143, and the fourth tire valve 144 is connected to the third port of the two-position three-way valve 13, and the other end is connected to the corresponding tire; the first tire valve 141, the second tire valve 142, the third tire valve 143, and the fourth tire valve 144 are electrically connected to the control unit 16.

[0037] The air spring unit 15 includes at least two of the following: a first air spring valve 151, a second air spring valve 152, a third air spring valve 153, a fourth air spring valve 154, a first air spring 155, a second air spring 156, a third air spring 157, and a fourth air spring 158. One end of each of the first, second, third, and fourth air spring valves 151, 152, 153, and 154 is connected to the second connection of a two-position three-way valve 13, and the other end is connected to the corresponding air spring. The first, second, third, and fourth air spring valves 151, 152, 153, and 154 are electrically connected to the control unit 16. This application does not limit the number of air spring valves and tire valves to four. If the vehicle has more than four air springs and / or tires, more air spring valves and / or tire valves can be added to the existing four.

[0038] The air spring valve and tire valve mentioned above are both normally closed valves, which only open when energized.

[0039] When a tire or air spring in tire unit 14 or air spring unit 15 needs to be inflated or deflated, control unit 16 can open the corresponding air spring valve or tire valve to inflate or deflate that tire or air spring.

[0040] All of the above components are connected by gas pipes 18.

[0041] The present invention also provides a vehicle comprising the above-described tire and air spring inflation / deflation system.

[0042] The tire and air spring inflation / deflation system and vehicle provided by this invention intelligently coordinate the working and connection status of the air pump and the connection status of the two-position three-way valve through the control unit, realizing the use of one air pump to inflate and deflate the tire and air spring. This solves the problem of the separation of tire pressure detection system and air spring air pump functions, which leads to the waste of hardware resources, and can reduce vehicle costs and improve vehicle system integration.

[0043] Figure 5This is a flowchart of a tire and air spring inflation / deflation control method according to an embodiment of the present invention.

[0044] like Figure 5 As shown, the tire and air spring inflation / deflation control method, applied to the aforementioned control unit 16, includes: Step S1: Obtain tire pressure, air spring pressure, and pressure buffer tank pressure.

[0045] Specifically, tire pressure, air spring pressure, and pressure buffer tank pressure are obtained through pressure sensor 2.

[0046] Step S2: Obtain the vehicle's driving mode and speed.

[0047] Specifically, the driving mode and vehicle speed are obtained through the driving mode sensor 3.

[0048] Step S3: When the tire pressure is within the preset pressure range, obtain the target air spring pressure according to the driving mode, and control the air pump to inflate or deflate the air spring based on the target air spring pressure and the air spring pressure.

[0049] Specifically, based on preset tire high pressure threshold and tire low pressure threshold, a preset air pressure range is obtained, and the tire pressure is periodically checked to see if it is within the preset air pressure range. When the tire pressure is within the preset air pressure range, it means that the tire pressure is within the normal air pressure range and the tire does not need to be inflated or deflated. At this time, the target air spring pressure corresponding to the driving mode is obtained, and the air spring pressure is used to determine whether the air spring needs to be inflated or deflated.

[0050] When the target air spring pressure is greater than the target air spring pressure, and the absolute difference between the target air spring pressure and the target air spring pressure is greater than or equal to the first preset pressure, it indicates that the air spring pressure is too low. In this case, the air pump is controlled to inflate the air spring. When the target air spring pressure is greater than the target air spring pressure, and the absolute difference between the target air spring pressure and the target air spring pressure is not greater than or equal to the first preset pressure, it indicates that the error between the target air spring pressure and the target air spring pressure is a normal deviation. In this case, the air spring is not inflated or deflated.

[0051] If the target air spring pressure is lower than the target air spring pressure, and the absolute difference between the target air spring pressure and the target air spring pressure is greater than or equal to the second preset pressure, it indicates that the air spring pressure is too high. In this case, the air pump is controlled to release air from the air spring. If the target air spring pressure is lower than the target air spring pressure, and the absolute difference between the target air spring pressure and the target air spring pressure is not greater than or equal to the second preset pressure, it indicates that the error between the target air spring pressure and the target air spring pressure is a normal deviation. In this case, the air spring is not charged or deflated.

[0052] In one embodiment, the air spring pressure is the air spring pressure of the target air spring. When the target air spring pressure is greater than the air spring pressure of the target air spring, and the absolute difference between the target air spring pressure and the air spring pressure of the target air spring is greater than or equal to a first preset pressure, the air pump and the corresponding air spring valve are controlled to inflate the target air spring. When the target air spring pressure is greater than the air spring pressure of the target air spring, and the absolute difference between the target air spring pressure and the air spring pressure of the target air spring is not greater than or equal to the first preset pressure, the target air spring is not inflated or deflated.

[0053] In one embodiment, when the target air spring pressure is less than the target air spring pressure, and the absolute difference between the target air spring pressure and the target air spring pressure is greater than or equal to a second preset pressure, the air pump and the corresponding air spring valve are controlled to release air from the target air spring; when the target air spring pressure is less than the target air spring pressure, and the absolute difference between the target air spring pressure and the target air spring pressure is not greater than or equal to the second preset pressure, the target air spring is not charged or deflated.

[0054] Step S4: When the tire pressure is not within the preset pressure range, obtain the target tire pressure based on the tire pressure, the pressure buffer tank pressure and the vehicle speed, and control the air pump and two-position three-way valve to inflate and deflate the tire based on the target tire pressure and the tire pressure.

[0055] Specifically, a first target tire pressure is obtained based on the tire pressure and the pressure buffer tank pressure. A correction coefficient is obtained based on the vehicle speed. The target tire pressure is then determined based on the first target tire pressure and the correction coefficient. When the target tire pressure is greater than the initial tire pressure, the air pump and the two-position three-way valve are controlled to inflate the tire. When the target tire pressure is not greater than the initial tire pressure, the air pump and the two-position three-way valve are controlled to deflate the tire. The correction coefficient is positively correlated with vehicle speed; that is, the higher the vehicle speed, the larger the correction coefficient. For example, if the first target tire pressure is 250 kPa, and the correction coefficient is 1.05 at a vehicle speed of 80 km / h, then the target tire pressure is 250 × 1.05 = 262.5 kPa. If the correction coefficient drops to 1.02 when the vehicle speed decreases to 40 km / h, then the target tire pressure is adjusted to 250 × 1.02 = 255 kPa. Through dynamic correction, the tire pressure requirements at different vehicle speeds can be accurately matched.

[0056] In one embodiment, the tire pressure is the tire pressure of the target tire. A first target pressure is obtained based on the tire pressure of the target tire and the pressure buffer tank pressure. The target tire pressure is obtained based on the first target pressure and a correction coefficient. When the target tire pressure is greater than the target tire pressure, the air pump, the two-position three-way valve, and the corresponding tire valve are controlled to inflate the target tire. When the target tire pressure is not greater than the target tire pressure, the air pump, the two-position three-way valve, and the corresponding tire valve are controlled to deflate the target tire.

[0057] It is understandable that the control unit will update the tire pressure and air spring pressure in real time when inflating or deflating the tire or air spring. When the tire pressure or air spring pressure reaches the target tire pressure or target air spring pressure, it will stop inflating or deflating the tire or air spring by controlling one or more of the air pump, two-position three-way valve, tire valve, and air spring valve.

[0058] In one embodiment, when the tires and air springs do not need to be inflated and / or deflated, and the vehicle speed is lower than a preset speed, if the air pump is in the air supply state and the duration of the air supply state exceeds a preset time (i.e., the air pump is malfunctioning), the air pump is controlled to open the first air pump switch valve and the second air pump switch valve to vent air.

[0059] The tire and air spring inflation / deflation system, vehicle, and control method provided by this invention intelligently coordinate the working and connection states of the air pump and the connection state of the two-position three-way valve through the control unit. This enables the use of a single air pump to inflate and deflate the tires and air springs, solving the problem of separating the functions of the tire pressure monitoring system and the air spring pump, which leads to wasted hardware resources. This reduces vehicle costs and improves the integration of the vehicle system.

[0060] It should be understood that although the steps in the flowcharts of the accompanying drawings are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the accompanying drawings may include multiple sub-steps or multiple stages, which are not necessarily completed at the same time, but may be executed at different times, and their execution order is not necessarily sequential, but may be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0061] Through the above description of the embodiments, those skilled in the art can clearly understand that the embodiments of the present invention can be implemented by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions of the embodiments of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause a computer device (such as a personal computer, server, or network device, etc.) to execute the methods described in the various implementation scenarios of the embodiments of the present invention.

[0062] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A tire and air spring inflation / deflation system, characterized in that, The system includes an air pump (11), a pressure buffer tank (12), a two-position three-way valve (13), a tire unit (14), an air spring unit (15), a control unit (16), and a vent valve (17). The first port of the air pump (11) is connected to the pressure buffer tank (12), the second port of the air pump (11) is connected to the vent valve (17), the first port of the two-position three-way valve (13) is connected to the pressure buffer tank (12), the second port of the two-position three-way valve (13) is connected to the air spring unit (15), the third port of the two-position three-way valve (13) is connected to the tire unit (14), and the control unit (16) is electrically connected to the air pump (11) and the two-position three-way valve (13).

2. The tire and air spring inflation / deflation system as described in claim 1, characterized in that, The air pump (11) includes a first air pump switch valve (111) and a second air pump switch valve (112). The air inlet of the first air pump switch valve (111) is connected to the air pump outlet pipe (113). The air outlet of the first air pump switch valve (111) is connected to the pressure buffer tank (12) and the air inlet of the second air pump switch valve (112). The air outlet of the second air pump switch valve (112) is connected to the vent valve (17).

3. The tire and air spring inflation / deflation system as described in claim 1, characterized in that, The control unit (16) is communicatively connected to the pressure sensor (2) and the driving mode sensor (3).

4. The tire and air spring inflation / deflation system as described in claim 1, characterized in that, The tire unit (14) also includes one or more tire valves, one end of which is connected to the third port of the two-position three-way valve (13), and the other end of which is connected to the corresponding tire.

5. The tire and air spring inflation / deflation system as described in claim 1, characterized in that, The air spring unit (15) also includes one or more air spring valves, one end of which is connected to the second port of the two-position three-way valve (13), and the other end of which is connected to the corresponding air spring.

6. The tire and air spring inflation / deflation system as described in any one of claims 4 or 5, characterized in that, The control unit (16) is also electrically connected to the tire valve and the air spring valve.

7. A vehicle, characterized in that, Including the inflation / deflation system of the tire and air spring as described in any one of claims 1-6.

8. A method for controlling the inflation and deflation of a tire and an air spring, characterized in that, Applied to a control unit, the method includes: Obtain tire pressure, air spring pressure, and pressure buffer tank pressure; Obtain the vehicle's driving mode and speed; When the tire pressure is within the preset pressure range, the target air spring pressure is obtained according to the driving mode, and the air pump is controlled to inflate or deflate the air spring based on the target air spring pressure and the air spring pressure. When the tire pressure is not within the preset pressure range, the target tire pressure is obtained based on the tire pressure, the pressure buffer tank pressure, and the vehicle speed. The air pump and the two-position three-way valve are then used to inflate and deflate the tire based on the target tire pressure and the tire pressure.

9. The method for controlling the inflation and deflation of a tire and air spring as described in claim 8, characterized in that, When the tire pressure is within a preset pressure range, the target air spring pressure is obtained according to the driving mode. Based on the target air spring pressure and the air spring pressure, the step of controlling whether the air pump inflates or deflates the air spring includes: When the target air spring pressure is greater than the air spring pressure, and the absolute difference between the target air spring pressure and the air spring pressure is greater than or equal to the first preset pressure, the air pump is controlled to inflate the air spring. When the target air spring pressure is greater than the air spring pressure, and the absolute difference between the target air spring pressure and the air spring pressure is not greater than or equal to the first preset pressure, the air pump is controlled not to charge or deflate the air spring. When the target air spring pressure is less than the air spring pressure, and the absolute difference between the target air spring pressure and the air spring pressure is greater than or equal to the second preset pressure, the air pump is controlled to release air from the air spring. When the target air spring pressure is less than the air spring pressure, and the absolute difference between the target air spring pressure and the air spring pressure is not greater than or equal to the second preset pressure, the air pump is controlled not to charge or deflate the air spring.

10. The method for controlling the inflation and deflation of a tire and air spring as described in claim 8, characterized in that, When the tire pressure is not within the preset pressure range, the steps of obtaining a target tire pressure based on the tire pressure, the pressure buffer tank pressure, and the vehicle speed, and controlling the air pump and two-position three-way valve to inflate and deflate the tire based on the target tire pressure and the tire pressure include: The first target pressure is obtained based on the tire pressure and the pressure buffer tank pressure. The correction coefficient is obtained based on the vehicle speed; The target tire pressure is obtained based on the first target tire pressure and the correction coefficient; When the target tire pressure is greater than the tire pressure, the air pump and two-position three-way valve are controlled to inflate the tire. When the target tire pressure is not greater than the tire pressure, the air pump and two-position three-way valve are controlled to deflate the tire.

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