Vehicle stiffness adjustment system, vehicle stiffness adjustment method and vehicle

Abstract

This application relates to a vehicle stiffness adjustment system, a vehicle stiffness adjustment method, and a vehicle. The vehicle stiffness adjustment system includes: a suspension detection component capable of acquiring suspension parameter information; a tire stiffness adjustment component capable of adjusting tire stiffness; and a control component connected to the suspension detection component and the tire stiffness adjustment component, capable of calculating the suspension stiffness based on the suspension parameter information and controlling the tire stiffness adjustment component to adjust the tire stiffness based on the suspension stiffness. This vehicle stiffness adjustment system can ensure that the tire and suspension maintain a good stiffness ratio under different operating conditions, improving the overall vehicle comfort.

Description

Technical Field

[0001] This application relates to the technical field of vehicles, and in particular to vehicle stiffness adjustment systems, vehicle stiffness adjustment methods, and vehicles. Background Technology

[0002] With the rapid development of society and the economy, vehicles have gradually become a common means of transportation, and people's requirements for vehicle comfort during driving have also gradually increased. As the only component of a vehicle in contact with the ground, the stiffness of the tires directly affects road feedback and grip. The suspension system is responsible for supporting the vehicle body, absorbing road impacts, and maintaining wheel contact with the ground. Under different driving conditions, such as high-speed driving, cornering, and bumpy roads, the stiffness ratio of the tires to the suspension affects the vehicle's handling, stability, and ride comfort.

[0003] However, due to changes in driving conditions such as load, road conditions, or outside temperature, the stiffness ratio of traditional tire and suspension system designs often varies significantly, reducing the overall vehicle comfort. Summary of the Invention

[0004] Therefore, it is necessary to provide a vehicle stiffness adjustment system, a vehicle stiffness adjustment method, and a vehicle to address the aforementioned technical problems and improve the overall vehicle comfort.

[0005] The first aspect of this application provides a vehicle stiffness adjustment system, comprising: a suspension detection component capable of acquiring suspension parameter information; a tire stiffness adjustment component connected to the tire and capable of adjusting the tire stiffness; and a control component connected to the suspension detection component and the tire stiffness adjustment component, capable of acquiring the suspension stiffness based on the suspension parameter information and controlling the tire stiffness adjustment component to adjust the tire stiffness based on the suspension stiffness.

[0006] The aforementioned vehicle stiffness adjustment system obtains suspension parameter information through the suspension detection component, calculates the suspension stiffness based on the suspension parameter information through the control component, calculates the ideal stiffness of the tire through the preset stiffness ratio of the tire and the suspension, controls the operation of the tire stiffness adjustment component based on the suspension stiffness through the control component, and adjusts the tire stiffness to the ideal stiffness through the tire stiffness adjustment component. Thus, under different operating conditions, the tire and suspension can always maintain a good stiffness ratio, improving the overall vehicle comfort.

[0007] In one embodiment, the suspension detection assembly includes a displacement sensor disposed on the suspension and connected to a control component. The displacement sensor is used to detect the amount of displacement of the suspension, and the control component can obtain the stiffness of the suspension based on the amount of displacement.

[0008] In one embodiment, the suspension detection assembly includes a pressure sensor connected to the suspension and a control unit. The pressure sensor is used to detect the air pressure of the suspension, and the control unit can obtain the stiffness of the suspension based on the air pressure.

[0009] In one embodiment, the vehicle stiffness adjustment system further includes a weight sensor connected to the control unit. The weight sensor is used to detect the load weight of the vehicle, and the control unit can obtain the suspension stiffness based on the load weight.

[0010] In one embodiment, the tire stiffness adjustment assembly includes an inflation / deflation unit connected to the tire and a control unit. The inflation / deflation unit is used to inflate or deflate the tire, and the control unit can control the inflation / deflation unit to inflate or deflate the tire according to the stiffness of the suspension.

[0011] In one embodiment, the tire stiffness adjustment assembly further includes a tire pressure sensor disposed on the tire and used to detect the tire pressure. A control unit is connected to the tire pressure sensor and is able to obtain the tire stiffness based on the tire pressure and control the opening or closing of the inflation / deflation unit based on the tire stiffness.

[0012] In one embodiment, the inflation / deflation unit includes an air source and a control valve. The air source is connected to the tire inflation port through the control valve. The control valve is connected to a control component, which can control the opening and closing of the control valve according to the stiffness of the tire.

[0013] In one embodiment, the inflation / deflation unit has an inflation state and a deflation state. In the inflation state, the control valve and the air source are open, the air inlet of the control valve is connected to the air outlet of the control valve, the air inlet of the control valve is connected to the air source, and the air outlet of the control valve is connected to the tire inflation hole. The air source can deliver gas to the tire sequentially through the control valve and the tire inflation hole. In the deflation state, the control valve is open, the air inlet of the control valve is connected to the tire inflation hole, and the air outlet of the control valve is connected to the outside, so that gas is discharged from the tire inflation hole through the control valve.

[0014] A second aspect of this application provides a method for adjusting the stiffness of a vehicle. The method is implemented by the vehicle stiffness adjustment system described above, and includes: acquiring suspension parameter information through a suspension detection component and transmitting it to a control component; calculating the stiffness of the suspension and the ideal stiffness of the tire through the control component; and adjusting the stiffness of the tire to the ideal stiffness through a tire stiffness adjustment component.

[0015] A third aspect of this application provides a vehicle that includes the vehicle stiffness adjustment system described above. Attached Figure Description

[0016] Figure 1This is a schematic diagram of a vehicle stiffness adjustment system according to an embodiment of this application.

[0017] Figure 2 This is a flowchart illustrating a vehicle stiffness adjustment method according to an embodiment of this application.

[0018] Explanation of reference numerals in the attached figures:

[0019] 100. Vehicle stiffness adjustment system; 10. Suspension detection component; 11. Displacement sensor; 12. Air pressure sensor; 20. Tire stiffness adjustment component; 21. Air source; 22. Control valve; 23. Tire pressure sensor; 30. Control component; 40. Weight sensor; 200. Suspension; 300. Tire. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0022] Furthermore, where the terms "first" and "second" appear, these terms are 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. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0025] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0026] See Figure 1 , Figure 1 A schematic diagram of a vehicle stiffness adjustment system 100 according to one embodiment of this application is shown. In some embodiments, the vehicle stiffness adjustment system 100 includes a suspension detection component 10, a tire stiffness adjustment component 20, and a control component 30. The suspension detection component 10 is disposed on the suspension 200, and the suspension detection component 10 is capable of acquiring parameter information of the suspension 200 (such as the displacement of the suspension 200, air pressure, etc.) and transmitting the parameter information of the suspension 200 to the control component 30.

[0027] The tire stiffness adjustment assembly 20 is connected to the tire 300 and the tire stiffness adjustment assembly 20 can adjust the stiffness of the tire 300, such as by changing the air pressure of the tire 300 to adjust the stiffness of the tire 300.

[0028] The control component 30 is connected to the suspension detection component 10 and the tire stiffness adjustment component 20. The control component 30 can calculate the stiffness of the suspension 200 based on the parameter information of the suspension 200 obtained by the suspension 200 test component, and control the tire stiffness adjustment component 20 to adjust the stiffness of the tire 300 based on the stiffness of the suspension 200, so that the tire 300 and the suspension 200 can have a good stiffness ratio.

[0029] Typically, the relationship between the parameters of the suspension 200 and its stiffness is obtained by conducting static tests, dynamic tests, and computer simulations on the vehicle. Thus, the control component 30 can calculate and obtain the stiffness value of the suspension 200 based on the parameter information of the suspension 200.

[0030] The suspension detection component 10 acquires the parameter information of the suspension 200, the control component 30 acquires the stiffness of the suspension 200 based on the parameter information of the suspension 200, the control component 30 controls the operation of the tire stiffness adjustment component 20 based on the stiffness of the suspension 200, and the tire stiffness adjustment component 20 adjusts the stiffness of the tire 300. Thus, under different working conditions, the vehicle stiffness adjustment system 100 ensures that the tire 300 and the suspension 200 can always maintain a good stiffness ratio, thereby improving the overall vehicle comfort.

[0031] In a feasible embodiment, the suspension detection assembly 10 includes a displacement sensor 11, which is disposed on the suspension 200 and connected to the control component 30. The displacement sensor 11 is used to detect the displacement of the suspension 200, and the control component 30 can calculate and obtain the stiffness of the suspension 200 based on the displacement.

[0032] When the displacement of suspension 200 is positive, the stiffness of suspension 200 tends to increase. To ensure a preset stiffness ratio between suspension 200 and tire 300, the tire stiffness adjustment component 20 is controlled to increase the stiffness of tire 300 until the stiffness ratio between tire 300 and suspension 200 meets the preset stiffness ratio. When the displacement of suspension 200 is negative, the stiffness of suspension 200 tends to decrease. To ensure a preset stiffness ratio between suspension 200 and tire 300, the tire stiffness adjustment component 20 is controlled to decrease the stiffness of tire 300 until the stiffness ratio between tire 300 and suspension 200 meets the preset stiffness ratio.

[0033] It should be noted that this application can select different preset stiffness ratios according to different vehicle models and driving conditions. For example, if the vehicle is a sedan, the preset stiffness ratio is about 1:2; if the vehicle is a sports vehicle, the preset stiffness ratio is about 1:1; and if the vehicle is an off-road vehicle, the preset stiffness ratio is between 1:2 and 1:3.

[0034] In a feasible embodiment, the suspension detection assembly 10 includes a pressure sensor 12 connected to the suspension 200 and the control unit 30. The pressure sensor 12 is used to detect the air pressure of the suspension 200, and the control unit 30 can calculate the stiffness of the suspension 200 based on the air pressure.

[0035] When the air pressure of the suspension 200 increases, the stiffness of the suspension 200 tends to increase. To ensure a preset stiffness ratio between the suspension 200 and the tire 300, the tire stiffness adjustment component 20 is controlled to increase the stiffness of the tire 300 until the stiffness ratio between the tire 300 and the suspension 200 meets the preset stiffness ratio. Conversely, when the air pressure of the suspension 200 decreases, the stiffness of the suspension 200 tends to decrease. To maintain the preset stiffness ratio between the suspension 200 and the tire 300, the tire stiffness adjustment component 20 is controlled to decrease the stiffness of the tire 300 until the stiffness ratio between the tire 300 and the suspension 200 meets the preset stiffness ratio.

[0036] In a feasible embodiment, the vehicle stiffness adjustment system 100 further includes a weight sensor 40, which is connected to the control unit 30. The weight sensor 40 is used to detect the load weight of the vehicle, and the control unit 30 can obtain the stiffness of the suspension 200 based on the load weight.

[0037] When the load increases, the stiffness of the suspension 200 tends to increase. To ensure a preset stiffness ratio between the suspension 200 and the tire 300, the tire stiffness adjustment component 20 is controlled to increase the stiffness of the tire 300 until the stiffness ratio between the tire 300 and the suspension 200 meets the preset stiffness ratio. When the load decreases, the stiffness of the suspension 200 tends to decrease. To ensure a preset stiffness ratio between the suspension 200 and the tire 300, the tire stiffness adjustment component 20 is controlled to decrease the stiffness of the tire 300 until the stiffness ratio between the tire 300 and the suspension 200 meets the preset stiffness ratio. It should be noted that the weight sensor 40 in this application is only one method for obtaining the vehicle's load weight; all vehicle load weight measuring devices in related technologies are applicable to this application.

[0038] In some embodiments, the tire stiffness adjustment assembly 20 includes an inflation / deflation unit connected to the tire 300 and the control unit 30. The inflation / deflation unit is used to inflate or deflate the tire 300, and the control unit 30 can control the inflation / deflation unit to inflate or deflate the tire 300 according to the stiffness of the suspension 200.

[0039] Typically, tire pressure is one of the factors affecting the stiffness of tire 300. Tire 300 is inflated by the inflation / deflation unit to increase its stiffness, and tire 300 is deflated by the inflation / deflation unit to decrease its stiffness. Thus, the stiffness of tire 300 is adjusted by inflating and deflating tire 300.

[0040] Specifically, when the stiffness of the suspension 200 increases, the tire 300 is inflated through the inflation / deflation unit, thereby increasing the stiffness of the tire 300 accordingly. When the stiffness of the suspension 200 decreases, the tire 300 is deflated through the inflation / deflation unit, thereby decreasing the stiffness of the tire 300 accordingly.

[0041] In other embodiments, the tire stiffness adjustment assembly 20 may also adjust the stiffness of the tire 300 by adjusting the shape of the tire 300, changing the air chamber structure of the tire 300, or using a tire 300 material with variable stiffness characteristics.

[0042] In a feasible embodiment, the tire stiffness adjustment assembly 20 further includes a tire pressure sensor 23, which is disposed on the tire 300 and used to detect the tire pressure of the tire 300. The control unit 30 is connected to the tire pressure sensor 23 and can obtain the stiffness of the tire 300 according to the tire pressure and control the opening or closing of the inflation / deflation unit according to the stiffness of the tire 300.

[0043] Typically, the relationship between tire pressure and tire stiffness is derived through theoretical models of tire 300, static and dynamic tests of tire 300, and computer simulations. The control unit 30 can then calculate the tire stiffness value based on the tire pressure. When the control unit 30 controls the tire stiffness adjustment component 20 to adjust the tire 300, it can determine whether the tire stiffness has been adjusted to the preset stiffness based on the tire pressure transmitted by the tire pressure sensor 23. This improves the adjustment accuracy of the tire stiffness adjustment component 20, ensuring that the stiffness ratio between the tire 300 and the suspension 200 is the preset stiffness ratio, thereby improving driving comfort.

[0044] Specifically, when the control unit 30 determines that the stiffness of the tire 300 is not at the preset stiffness based on the tire pressure transmitted by the tire pressure sensor 23, the control unit 30 controls the inflation / deflation unit to open and inflate or deflate the tire 300. When the control unit 30 determines that the stiffness of the tire 300 has reached the preset stiffness based on the tire pressure transmitted by the tire pressure sensor 23, the control unit 30 controls the inflation / deflation unit to close and stops adjusting the tire 300.

[0045] In a feasible embodiment, the inflation / deflation unit includes an air source 21 and a control valve 22. The output nozzle of the air source 21 is connected to the inflation port of the tire 300 through the control valve 22. Both the air source 21 and the control valve 22 are connected to a control component 30, which can control the opening and closing of the air source 21 and the control valve 22 according to the stiffness of the tire 300. Optionally, the air source 21 is an adjustable air pump, which can generate high-pressure gas, thereby quickly and effectively injecting gas into the interior of the tire 300 and increasing the internal tire pressure of the tire 300.

[0046] When the tire pressure sensor 23 determines that the stiffness of the tire 300 is not at the preset stiffness, the control unit 30 controls the air source 21 and the control valve 22 to open, so as to inflate or deflate the tire 300. When the control unit 30 determines that the stiffness of the tire 300 has reached the preset stiffness, the control unit 30 controls the air source 21 and the control valve 22 to close, and stops inflating or deflating the tire 300.

[0047] Specifically, the inflation / deflation unit has an inflation state and a deflation state. In the inflation state, the control valve 22 and the air source 21 are open. The air inlet of the control valve 22 is connected to the air outlet of the control valve 22, and the air inlet of the control valve 22 is connected to the air source 21. The air outlet of the control valve 22 is connected to the inflation port of the tire 300. The air source 21 can deliver gas to the tire 300 in sequence through the control valve 22 and the inflation port of the tire 300, thereby inflating the tire 300 and increasing the rigidity of the tire 300.

[0048] In the deflated state, control valve 22 is opened. The air inlet of control valve 22 is connected to the inflation port of tire 300, and the air outlet of control valve 22 is connected to the outside, so that gas is discharged from the inflation port of tire 300 through control valve 22, thereby deflating tire 300 and reducing the stiffness of tire 300.

[0049] Combination Figure 1 and Figure 2 In another aspect, this application provides a method for adjusting the stiffness of a vehicle. This method is implemented using the vehicle stiffness adjustment system 100 described in the above embodiments and includes the following steps:

[0050] S10, the suspension 200 parameter information is obtained through the suspension detection component 10 and transmitted to the control component 30.

[0051] Specifically, the displacement and air pressure information of the suspension 200 are detected by the displacement sensor 11 and the air pressure sensor 12 respectively, the parameter information of the suspension 200 is obtained and transmitted to the control unit 30.

[0052] S20, the stiffness of the suspension 200 and the ideal stiffness of the tire 300 are calculated through the control component 30.

[0053] Specifically, the control unit 30 calculates the stiffness of the suspension 200 based on the parameter information of the suspension 200, calculates the actual stiffness of the tire 300 based on the tire pressure obtained by the tire pressure sensor 23, and calculates the ideal stiffness of the tire 300 based on the preset stiffness ratio.

[0054] S30, the stiffness of tire 300 is adjusted to the ideal stiffness by means of tire stiffness adjustment component 20.

[0055] Specifically, the control unit 30 controls the tire stiffness adjustment assembly 20 to adjust the stiffness of the tire 300 according to the ideal stiffness of the tire 300, so that the tire 300 and the suspension 200 reach a preset stiffness ratio, thereby improving driving comfort.

[0056] Optionally, after the control unit 30 calculates the ideal stiffness of the tire 300 according to the preset stiffness ratio, it calculates the ideal tire pressure according to the relationship between the tire pressure of the tire 300 and the tire stiffness of the tire 300, and inflates or deflates the tire 300 to the ideal tire pressure through the inflation / deflation unit.

[0057] Specifically, in this embodiment, when the weight sensor 40 detects an increase in the vehicle's loaded weight, the displacement sensor 11 detects a negative displacement of the suspension 200, or the air pressure sensor 12 detects an increase in the air pressure of the suspension 200, the stiffness of the suspension 200 increases. At this time, the control unit 30 analyzes and calculates the tire stiffness of the tire 300 corresponding to this suspension 200 stiffness and the tire pressure of the tire 300 corresponding to this stiffness. The control unit 30 controls the solenoid valve to open and inflates the tire 300 through the air source 21. When the tire pressure obtained by the tire pressure sensor 23 reaches the tire pressure of the tire 300 calculated by the control unit 30, the control unit 30 controls the solenoid valve to close and stops inflating the tire 300.

[0058] When the weight sensor 40 detects a decrease in the overall vehicle load weight, the displacement sensor 11 detects a positive displacement of the suspension 200, or the air pressure sensor 12 detects a decrease in the air pressure of the suspension 200, the stiffness of the suspension 200 decreases. At this time, the control unit 30 analyzes and calculates the tire stiffness of the tire 300 corresponding to this suspension stiffness and the tire pressure of the tire 300 at this stiffness. The control unit 30 controls the solenoid valve to open and deflate the tire 300 through the solenoid valve. When the tire pressure obtained by the tire pressure sensor 23 reaches the tire pressure of the tire 300 calculated by the control unit 30, the control unit 30 controls the solenoid valve to close and stop deflation of the tire 300.

[0059] This vehicle stiffness adjustment method ensures that the tire 300 and suspension 200 maintain a constant and good preset stiffness ratio, thereby guaranteeing good vehicle acceleration and dynamic load, and ultimately ensuring that the vehicle has excellent driving comfort.

[0060] With the same concept, this application also provides a vehicle, which includes a vehicle stiffness adjustment system 100, which is the same vehicle stiffness adjustment system 100 described in the above embodiments. It should be noted that this application does not limit the type of vehicle; vehicle types such as passenger cars, trucks, buses, or special-purpose vehicles are all acceptable.

[0061] The vehicle stiffness adjustment system 100 and the vehicle stiffness adjustment method coordinate the design of tire stiffness 300, vehicle mass and suspension stiffness 200, and control tire stiffness through control component 30, so that tire 300 and suspension 200 can maintain a constant and good preset stiffness ratio under different load weights and operating conditions, thereby improving the overall vehicle comfort.

[0062] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A vehicle stiffness adjustment system, characterized in that, The vehicle stiffness adjustment system includes: A suspension detection component, which is capable of acquiring suspension parameter information; A tire stiffness adjustment assembly, the tire stiffness adjustment assembly being connected to the tire and capable of adjusting the stiffness of the tire; and A control unit is connected to the suspension detection assembly and the tire stiffness adjustment assembly. The control unit can calculate the stiffness of the suspension based on the parameter information of the suspension and control the tire stiffness adjustment assembly to adjust the stiffness of the tire based on the stiffness of the suspension. When the suspension displacement is positive, the suspension stiffness increases. To ensure that the suspension and tires have a preset stiffness ratio, the tire stiffness is increased by controlling the operation of the tire stiffness adjustment component until the stiffness ratio between the tire and the suspension meets the preset stiffness ratio. When the suspension displacement is negative, the suspension stiffness decreases. To ensure that the suspension and tires have a preset stiffness ratio, the tire stiffness is decreased by controlling the operation of the tire stiffness adjustment component until the stiffness ratio between the tire and the suspension meets the preset stiffness ratio.

2. The vehicle stiffness adjustment system according to claim 1, characterized in that, The suspension detection assembly includes a displacement sensor, which is disposed on the suspension and connected to the control component. The displacement sensor is used to detect the displacement of the suspension, and the control component can obtain the stiffness of the suspension based on the displacement.

3. The vehicle stiffness adjustment system according to claim 1, characterized in that, The suspension detection assembly includes a pressure sensor connected to the suspension and the control unit. The pressure sensor is used to detect the air pressure of the suspension, and the control unit can obtain the stiffness of the suspension based on the air pressure.

4. The vehicle stiffness adjustment system according to claim 1, characterized in that, The vehicle stiffness adjustment system also includes a weight sensor connected to the control unit. The weight sensor is used to detect the load weight of the vehicle, and the control unit can obtain the stiffness of the suspension based on the load weight.

5. The vehicle stiffness adjustment system according to claim 1, characterized in that, The tire stiffness adjustment assembly includes an inflation / deflation unit connected to the tire and the control unit. The inflation / deflation unit is used to inflate or deflate the tire, and the control unit can control the inflation / deflation unit to inflate or deflate the tire according to the stiffness of the suspension.

6. The vehicle stiffness adjustment system according to claim 5, characterized in that, The tire stiffness adjustment assembly also includes a tire pressure sensor, which is disposed on the tire and used to detect the tire pressure. The control unit is connected to the tire pressure sensor and can obtain the tire stiffness based on the tire pressure and control the opening or closing of the inflation / deflation unit based on the tire stiffness.

7. The vehicle stiffness adjustment system according to claim 6, characterized in that, The inflation / deflation unit includes an air source and a control valve. The air source is connected to the tire inflation port through the control valve. The control valve is connected to the control component, and the control component can control the opening and closing of the control valve according to the stiffness of the tire.

8. The vehicle stiffness adjustment system according to claim 7, characterized in that, The inflation / deflation unit has an inflation state and a deflation state; In the inflated state, the control valve and the air source are open. The air inlet of the control valve is connected to the air outlet of the control valve, the air inlet of the control valve is connected to the air source, and the air outlet of the control valve is connected to the tire inflation hole. The air source can deliver gas to the tire sequentially through the control valve and the tire inflation hole. In the deflated state, the control valve is opened, the air inlet of the control valve is connected to the tire inflation hole, and the air outlet of the control valve is connected to the outside, so that gas is discharged from the tire inflation hole through the control valve.

9. A method for adjusting the stiffness of a vehicle, characterized in that, The vehicle stiffness adjustment method is implemented using the vehicle stiffness adjustment system as described in any one of claims 1-8, and includes the following steps: The suspension parameter information is obtained through the suspension detection component and transmitted to the control unit; The stiffness of the suspension and the ideal stiffness of the tires are calculated using control components. The tire stiffness is adjusted to the ideal stiffness using the tire stiffness adjustment assembly.

10. A vehicle, characterized in that, The vehicle includes the vehicle stiffness adjustment system as described in any one of claims 1-8.

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