Tire pressure adjustment method and device for tire mixed loading vehicle

Abstract

The application discloses a tire pressure adjustment method and device for a tire mixed loading vehicle. The method comprises the following steps: obtaining vehicle load configuration information and tire specification information of a target vehicle, wherein the tire specification information at least comprises the outer diameters of each tire in the target vehicle; determining the load values of each tire in the target vehicle according to the vehicle load configuration information, and determining reference tires and non-reference tires in the target vehicle according to the tire specification information; calculating the target load radius of the reference tires according to the load values of the reference tires and a preset standard pressure; determining the adjustment pressure required by each non-reference tire to reach the target load radius under the corresponding load value, and adjusting the pressure of the corresponding non-reference tire by using the adjustment pressure. The application solves the technical problem that related calculation cannot quickly and accurately adjust the pressure of different outer diameter tires in the tire mixed loading vehicle.

Description

Technical Field

[0001] This application relates to the field of tire engineering technology, and more specifically, to a method and apparatus for adjusting tire pressure in a vehicle with mixed tire loads. Background Technology

[0002] In the transportation industry, especially in the application scenarios of heavy-duty trucks, tires of different outer diameters are often mixed and matched on the same vehicle in various ways to meet diverse and complex load requirements. However, when tires of different outer diameters are mixed on the same vehicle, if the tire load radii are inconsistent, it will lead to uneven stress on the vehicle during operation. This uneven stress not only seriously affects the vehicle's stability and increases the difficulty of handling, but also causes abnormal tire wear and significantly shortens tire life. Therefore, to ensure smooth vehicle operation, the tire pressure of tires of different outer diameters can be adjusted to maintain the same load radius.

[0003] Currently, the technologies for adjusting tire pressure in the above situations usually involve experimental testing or theoretical calculation. However, experimental testing requires full-condition testing for tires with different outer diameters, which is time-consuming and costly. Theoretical calculation lacks versatility and rapid solution capabilities, and cannot meet the needs of efficient and accurate tire pressure acquisition in actual engineering.

[0004] There is currently no effective solution to the above problems. Summary of the Invention

[0005] This application provides a method and apparatus for adjusting tire pressure in a vehicle with mixed tires, so as to at least solve the technical problem that related calculations cannot quickly and accurately adjust the tire pressure of tires with different outer diameters in a vehicle with mixed tires.

[0006] According to one aspect of the embodiments of this application, a tire pressure adjustment method for a vehicle with mixed tires is provided, comprising: acquiring vehicle load configuration information and tire specification information of a target vehicle, wherein the tire specification information includes at least: the outer diameter of each tire in the target vehicle; determining the load value of each tire in the target vehicle based on the vehicle load configuration information, and determining the reference tire and non-reference tires in the target vehicle based on the tire specification information; calculating the target load radius of the reference tire based on the load value of the reference tire and a preset standard tire pressure; determining the adjustment pressure required for each non-reference tire to reach the target load radius under the corresponding load value, and adjusting the tire pressure of the corresponding non-reference tire using the adjustment pressure.

[0007] Optionally, the vehicle load configuration information includes at least: total mass, axle configuration information reflecting the type of axles on the vehicle and the geometric relationship between the axles and wheels, and axle wheel position information reflecting the number of tires on each axle of the vehicle. The total mass is equal to the sum of the unloaded weight of the target vehicle and the target load weight. Determining the load value of each tire in the target vehicle based on the vehicle load configuration information includes: determining the load value on each axle of the target vehicle based on the total mass and axle configuration information of the target vehicle using the principles of mechanical balance and torque balance; determining the number of tires on each axle of the target vehicle based on the axle wheel position information; and obtaining the load value of the tires deployed on each axle of the target vehicle by dividing the load value on each axle by the number of tires on the corresponding axle.

[0008] Optionally, determining the reference tires and non-reference tires in the target vehicle based on tire specification information includes: determining the outer diameter of each tire in the target vehicle based on tire specification information, and determining the number of tires corresponding to each outer diameter; taking the tire with the largest number of tires corresponding to the target outer diameter as the reference tire, and taking the tires with other outer diameters in the target vehicle besides the target outer diameter as non-reference tires.

[0009] Optionally, based on the load value of the reference tire and the preset standard air pressure, the target load radius of the reference tire is calculated, including: determining the material parameters and structural parameters of the reference tire, and calculating the radial stiffness and tensile stiffness of the reference tire in combination with the standard air pressure. The material parameters include at least: rubber elastic modulus and rubber shear modulus, and the structural parameters include at least: sidewall cross-sectional area, sidewall radius of curvature, sidewall angle, and sidewall inertia matrix. The sinkage of the reference tire is obtained by dividing the load value of the reference tire by the sum of the radial stiffness and tensile stiffness. The inflation radius of the reference tire under the standard air pressure is obtained, and the sinkage is subtracted from the inflation radius to obtain the target load radius of the reference tire.

[0010] Optionally, determining the adjustment air pressure required for each non-reference tire to reach the target load radius under the corresponding load value includes: for each non-reference tire, obtaining the linear relationship between the inflation radius and air pressure of the non-reference tire; obtaining the material parameters and structural parameters of the non-reference tire, and constructing a linear relationship between the deflection of the non-reference tire and air pressure in combination with the load value of the non-reference tire; using the linear relationship between the inflation radius and air pressure of the non-reference tire as the subtrahend, the linear relationship between the deflection of the non-reference tire and air pressure as the minuend, and the target load radius as the difference, constructing a target equation; solving the target equation to obtain the adjustment air pressure required for the non-reference tire to reach the target load radius under the corresponding load value.

[0011] Optionally, obtaining the linear relationship between the inflation radius and air pressure of a non-reference tire includes: constructing a tire finite element model of the non-reference tire; performing inflation simulation on the tire finite element model to obtain the inflation radius of the non-reference tire under different air pressures; and performing linear fitting on the inflation radius of the non-reference tire under different air pressures to obtain the linear relationship between the inflation radius and air pressure of the non-reference tire.

[0012] Optionally, after adjusting the air pressure of the corresponding non-reference tires using the air pressure adjustment method, the method further includes: obtaining the air pressure of the reference tire and each non-reference tire in the target vehicle under different load weights, and fitting the air pressure of the reference tire and each non-reference tire in the target vehicle under different load weights to obtain the air pressure relationship between each non-reference tire and the reference tire in the target vehicle under different load weights; and updating the air pressure relationship using the standard air pressure of the reference tire of the target vehicle under the target load weight and the adjusted air pressure of each non-reference tire.

[0013] According to another aspect of the embodiments of this application, a tire pressure adjustment device for a vehicle with mixed tires is also provided, comprising: an acquisition module, configured to acquire vehicle load configuration information and tire specification information of a target vehicle, wherein the tire specification information includes at least the outer diameter of each tire in the target vehicle; a determination module, configured to determine the load value of each tire in the target vehicle based on the vehicle load configuration information, and to determine the reference tire and non-reference tires in the target vehicle based on the tire specification information; a calculation module, configured to calculate the target load radius of the reference tire based on the load value of the reference tire and a preset standard air pressure; and an adjustment module, configured to determine the adjustment air pressure required for each non-reference tire to reach the target load radius under the corresponding load value, and to adjust the air pressure of the corresponding non-reference tire using the adjustment air pressure.

[0014] According to another aspect of the embodiments of this application, a computer program product is also provided, the computer program product comprising: a computer program, wherein when the computer program is executed by a processor, it implements the above-described method for adjusting tire pressure in a vehicle with mixed tires.

[0015] According to another aspect of the embodiments of this application, an electronic device is also provided, the electronic device comprising: a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the above-described tire pressure adjustment method for a tire-mixed vehicle through the computer program.

[0016] In this embodiment, vehicle load configuration information and tire specification information of the target vehicle are obtained. The tire specification information includes at least the outer diameter of each tire in the target vehicle. The load value of each tire in the target vehicle is determined based on the vehicle load configuration information, and the reference tire and non-reference tires in the target vehicle are determined based on the tire specification information. The target load radius of the reference tire is calculated based on the load value of the reference tire and a preset standard tire pressure. The adjustment pressure required for each non-reference tire to reach the target load radius under the corresponding load value is determined, and the tire pressure of the corresponding non-reference tire is adjusted using the adjustment pressure. By analyzing the dynamic relationship between the tire load radius and tire pressure, it is ensured that even when tires of different outer diameters are mixed, precise adjustment of tire pressure can still ensure that tires of different outer diameters on the same vehicle can reach a uniform load radius, thereby maintaining the stability and safety of vehicle operation. This solves the technical problem that related calculations cannot quickly and accurately adjust the tire pressure of tires of different outer diameters in vehicles with mixed tires. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic flowchart of an optional tire pressure adjustment method for a vehicle with mixed tires according to an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of an optional tire-mixed vehicle according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the inflation radius-pressure relationship curve of an optional non-reference tire B according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the load-sag relationship curve of an optional non-reference tire B according to an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the air pressure relationship curve between an optional non-reference tire B and reference tires A3-A8 according to an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the structure of an optional tire pressure adjustment device for a vehicle with mixed tires according to an embodiment of this application.

[0024] Figure 7 This is a schematic diagram of the hardware structure of a computer terminal for implementing a tire pressure adjustment method for a vehicle with mixed tires, according to an embodiment of this application. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first," "second," etc., used in the specification, claims, and drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] Example 1

[0028] According to an embodiment of this application, a method for adjusting tire pressure in a vehicle with mixed tires is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0029] Figure 1 This is a schematic flowchart of a tire pressure adjustment method for a vehicle with mixed tires according to an embodiment of this application. Figure 1 As shown, the method includes the following steps:

[0030] Step S102: Obtain the vehicle load configuration information and tire specification information of the target vehicle, wherein the tire specification information includes at least the outer diameter of each tire in the target vehicle.

[0031] Step S104: Determine the load value of each tire in the target vehicle based on the vehicle load configuration information, and determine the reference tire and non-reference tire in the target vehicle based on the tire specification information.

[0032] Step S106: Calculate the target load radius of the reference tire based on the load value of the reference tire and the preset standard air pressure.

[0033] Step S108: Determine the adjustment air pressure required for each non-reference tire to reach the target load radius under the corresponding load value, and adjust the air pressure of the corresponding non-reference tire using the adjustment air pressure.

[0034] Based on the solutions defined in steps S102 to S108 above, it can be understood that in this embodiment of the application, by analyzing the dynamic relationship between the load radius of the tire and the air pressure, it is ensured that even when tires of different outer diameters are mixed, the air pressure can still be precisely adjusted to ensure that tires of different outer diameters on the same vehicle can achieve a uniform load radius, thereby maintaining the stability and safety of vehicle driving.

[0035] The following describes the steps of adjusting tire pressure for vehicles with mixed tires, using a specific implementation process as an example.

[0036] In the technical solution provided in step S102 above, the system first obtains the vehicle load configuration information and tire specification information of the target vehicle, wherein:

[0037] Vehicle load configuration information refers to the load distribution of each axle on a target vehicle under a certain operating condition and its relationship with the tires, including but not limited to gross vehicle weight, axle configuration information, and axle wheel position information. Gross vehicle weight is the total weight of the vehicle after loading cargo; it equals the sum of the vehicle's unloaded weight and the target load weight, reflecting the load level of the vehicle in actual operation. Axle configuration information covers the type of axles on the vehicle (such as front drive axle, rear drive axle, trailing axle, load-bearing axle, etc.) and the geometric relationship between the axles and wheels (such as the position and length of the axles and the distance between the wheels), reflecting the force transmission path and contact method between the axles and tires. Axle wheel position information clarifies the number and specific location of tires installed on each axle of the vehicle, which is crucial for determining the actual load borne by each tire.

[0038] Tire specifications refer to key data related to tire performance, including but not limited to tire model, physical dimensions, structural parameters (such as sidewall cross-sectional area, radius of curvature, arc angle, moment of inertia, etc.), and material properties (such as rubber elastic modulus, rubber shear modulus, etc.). Among these physical dimensions, the most important is the tire's outer diameter, which is the straight-line distance from the edge of the rim to the highest point of the tread when the tire is not under load. Even tires of different brands or models with the same nominal specifications may have different actual outer diameters.

[0039] In the technical solution provided in step S104 above, the system can determine the load value of each tire in the target vehicle based on the vehicle load configuration information, and determine the reference tire and non-reference tire in the target vehicle based on the tire specification information.

[0040] As an optional implementation, in the technical solution provided in step S104 above, the system can determine the load value of each tire in the target vehicle according to the following method:

[0041] Step 1: Based on the target vehicle's total mass and axle configuration information, determine the load values ​​on each axle using the principles of mechanical equilibrium and torque balance. Specifically, the principle of mechanical equilibrium ensures that the sum of the external forces acting on the system equals zero, guaranteeing the vehicle's balance in all directions. The principle of torque balance ensures that the sum of the torques acting on the vehicle's center of gravity is also zero, thus guaranteeing the vehicle's structural stability.

[0042] Step 2: Determine the number of tires on each axle of the target vehicle based on the axle wheel position information.

[0043] Step 3: Divide the load value on each axle by the number of tires on the corresponding axle to obtain the load value of the tires deployed on each axle of the target vehicle.

[0044] In the above embodiments, the system can analyze the mechanical effects of the target vehicle in static and dynamic states by establishing a mechanical model and a moment model of the target vehicle based on the total mass and axle configuration information of the target vehicle, thereby calculating the specific load value borne by each axle; next, based on the axle wheel position information, the number of tires installed on each pair of axles on the target vehicle is determined; finally, the total load value on each axle is divided by the number of tires installed on it to obtain the load value of a single tire.

[0045] For example, two tires of the same specifications but with different outer diameters, tire A (design radius 765.1 mm) and tire B (design radius 740 mm), are... Figure 2 The configuration shown is installed on the same transport vehicle, which has a net weight of 35 tons and a cargo capacity of 70 tons. Therefore, by constructing... Figure 2 The mechanical and torque models of the target vehicle are shown. The mechanical effects of the target vehicle in static and dynamic states are analyzed, and the results are obtained. Figure 2 The load values ​​for the three axles are Q1 = 25t, Q2 = 40t, and Q3 = 40t, respectively. Based on the axle wheel position information, we know... Figure 2 The number of tires on axle Q1 is 2, while the number of tires on axles Q2 and Q3 is 4 each. Therefore, after determining the load value and tire quantity for each axle, it can be determined that... Figure 2 The load values ​​of the tires deployed on each axle of the target vehicle shown are as follows: F A1 =F A2 =12.5t, F B1 =F B2 =F A3 =FA4 =F A5 =F A6 =F A7 =F A8 =10t.

[0046] As an optional implementation, in the technical solution provided in step S104 above, the system can also determine the reference tires and non-reference tires in the target vehicle according to the following method:

[0047] Step 1: Determine the outer diameter of each tire in the target vehicle based on the tire specification information, and determine the number of tires corresponding to each outer diameter;

[0048] Step 2: Select the tire with the largest number of tires corresponding to the target outer diameter as the reference tire, and select the tires with other outer diameters in the target vehicle that are not the target outer diameter as non-reference tires.

[0049] The role of the reference tire is to serve as a standard reference point for tire pressure adjustment, ensuring that other non-reference tires can achieve the same load radius as the reference tire through pressure adjustment.

[0050] In addition to the above-listed implementation schemes, based on the basic concept of this invention, those skilled in the art can also determine the reference tire and non-reference tire through other technical solutions. For example, defining the reference tire and non-reference tire based on the load capacity of the tire, defining the reference tire and non-reference tire based on the position of the tire, etc., should also be within the protection scope of this invention.

[0051] In the technical solution provided in step S106 above, the system can calculate the target load radius of the reference tire based on the load value of the reference tire and the preset standard air pressure.

[0052] As an optional implementation, in the technical solution provided in step S106 above, the method may include:

[0053] Step 1: Determine the material and structural parameters of the reference tire, and calculate the radial stiffness and tensile stiffness of the reference tire in combination with the standard tire pressure. The material parameters should include at least the rubber elastic modulus and rubber shear modulus, and the structural parameters should include at least the sidewall cross-sectional area, sidewall radius of curvature, sidewall angle, and sidewall inertia matrix.

[0054] Therefore, the expression for the radial stiffness of the reference tire can be written as:

[0055]

[0056] In the formula, r represents the radius of curvature of the sidewall arc of the reference tire, φ represents the sidewall arc angle of the reference tire, I represents the sidewall inertia matrix of the reference tire, E represents the rubber elastic modulus of the reference tire, G represents the rubber shear modulus of the reference tire, and S represents the sidewall cross-sectional area of ​​the tire.

[0057] The expression for the tensile stiffness of a reference tire can be written as:

[0058]

[0059] In the formula, P represents the standard tire pressure of the reference tire, where standard other is the average value of the cold air pressure recommended by the tire manufacturer. For example, if the recommended cold air pressure is 1100 kPa to 1300 kPa, then the standard tire pressure is 1200 kPa.

[0060] Step 2: Divide the load value of the reference tire by the sum of its radial stiffness and tensile stiffness to obtain the deflection of the reference tire. Therefore, the expression for the deflection of the reference tire can be written as:

[0061]

[0062] Step 3: Obtain the inflation radius of the reference tire under standard air pressure, and subtract the sinking amount from the inflation radius to obtain the target load radius of the reference tire.

[0063] The inflation radius of a reference tire under standard tire pressure can be obtained by simulating inflation using a finite element model of the reference tire under standard tire pressure. Alternatively, the radius of the reference tire after inflation under standard tire pressure can be measured using a laser rangefinder or other measuring tools.

[0064] Using the above method, the system can accurately quantify the mechanical performance of a benchmark tire under specific load and air pressure conditions, and transform abstract mechanical characteristics into a specific target load radius through a mathematical model. This target load radius is the load radius of other non-benchmark tires.

[0065] For example, Figure 2 In the target vehicle shown, since tires A on axles Q2 and Q3 have the largest number of tires and the same load, tires A3-A8 are used as the reference tires.

[0066] A standard air pressure of 1200 kPa was applied to tires A3-A8 on axles Q2 and Q3 respectively. Based on the load value, standard air pressure, material parameters, and structural parameters of tires A3-A8, the deflection of tires A3-A8 can be calculated to be 59.46 mm. Then, the inflation radius of tires A3-A8 at 1200 kPa was measured to be 765.3 mm using a laser rangefinder. Finally, the difference between the inflation radius of 765.3 mm and the deflection of 59.46 mm can be used to obtain the load radius of the reference tire A3-A8 as 705.84 mm.

[0067] In the technical solution provided in step S108 above, the system can first determine the adjustment air pressure required for each non-reference tire to reach the target load radius under the corresponding load value, and then use the adjustment air pressure to adjust the air pressure of the corresponding non-reference tire.

[0068] As an optional implementation, in the technical solution provided in step S108 above, the method may include:

[0069] Step 1: For each non-reference tire, obtain the linear relationship between the inflation radius and air pressure of the non-reference tire.

[0070] In the technical solution provided in the first step above, the method may include: constructing a tire finite element model of a non-reference tire; performing inflation simulation on the tire finite element model to obtain the inflation radius of the non-reference tire under different air pressures; and performing linear fitting on the inflation radius of the non-reference tire under different air pressures to obtain a linear relationship between the inflation radius and air pressure of the non-reference tire.

[0071] Specifically, the system first acquires the geometric parameters (reflecting the tire's physical dimensions and structural characteristics) and material parameters (key factors influencing the tire's mechanical behavior) of the non-reference tire. The geometric parameters include at least: outer diameter, inner diameter, cross-sectional width, rim diameter, and the thickness of each layer in the tire structure. The material parameters include at least: elastic modulus, Poisson's ratio, and density. Next, based on the geometric parameters, a geometric model of the tire sample is constructed using specialized finite element modeling software, and the material parameters are assigned to the corresponding positions in the geometric model, resulting in the finite element model of the non-reference tire. Then, different air pressures are applied to the cavity of the tire finite element model to simulate the behavior of the non-reference tire under different inflation states, obtaining the inflation radius of the non-reference tire under different air pressures. Finally, the system organizes the inflation radii obtained from the simulation under different air pressures and analyzes these organized data using linear fitting methods in statistics (such as the least squares method) to obtain a linear equation describing the relationship between the two, in the form of R0. 非基准轮胎 =f(P 非基准轮胎 )=a*P 非基准轮胎+b (a represents the slope of the fitted straight line, and b represents the design radius of the tire) serves as the linear relationship between the inflation radius and air pressure of a non-reference tire.

[0072] In other words, the system uses finite element analysis to transform the complex mechanical behavior of a non-reference tire into a series of easily analyzable inflation radius data. By linearly fitting these data, a simplified mathematical model is established that clearly reflects the variation of inflation radius with air pressure.

[0073] Step 2: Obtain the material and structural parameters of the non-reference tire, and construct a linear relationship between the deflection of the non-reference tire and the air pressure by combining the load value of the non-reference tire.

[0074] The linear relationship between the deflection of a non-reference tire and its air pressure can be expressed as:

[0075]

[0076] In the formula, d is the radial stiffness k of the non-reference tire. t c is the coefficient of the air pressure variable, and φ represents the sidewall arc angle of a non-standard tire.

[0077] Step 3: Using the linear relationship between the inflation radius and air pressure of the non-reference tire as the subtrahend, and the linear relationship between the deflection and air pressure of the non-reference tire as the minuend, and using the target load radius as the difference, construct the target equation. Therefore, the expression for the target equation can be written as:

[0078] R = R 非基准轮胎 -U 非基准轮胎 =f(P 非基准轮胎 )-f(F 非基准轮胎 ,P 非基准轮胎 )

[0079] The objective equation mentioned above contains only P. 非基准轮胎 This is an unknown quantity.

[0080] Step 4: Solve the objective equation to obtain the adjustment air pressure required for the non-reference tire to reach the target load radius under the corresponding load value.

[0081] In the above embodiments, the system constructs a target equation based on the linear relationship between the inflation radius and air pressure of the non-reference tire and the linear relationship between the sinking amount and air pressure. By solving the equation, the system can accurately calculate the adjustment air pressure required for the non-reference tire to reach the target load radius under different load conditions. Therefore, the system can adjust the air pressure of the corresponding tire according to the calculated adjustment air pressure.

[0082] For example, targeting Figure 2For the non-reference tires B1 and B2, static load tests can be conducted on them under different inflation pressures. Simultaneously, a laser rangefinder is used to measure and record their inflation radii at different pressures. By performing linear fitting on the three data points, the linear relationship between the inflation radius and inflation pressure for the non-reference tires B1 and B2 can be obtained as R. B =f(P B )=0.0029*P B +740.52, as Figure 3 As shown. Next, the material and structural parameters of non-reference tires B1 and B2 are obtained, and combined with the F of non-reference tires B1 and B2. B1 =F B2 =10t, construct a linear relationship between the deflection and air pressure of non-reference tires B1 and B2:

[0083]

[0084] It should be noted that, in order to verify the above U B =f(F B ,P B To improve accuracy, the system can also conduct static load tests on non-reference tire B at three inflation pressures: 1000 kPa, 1300 kPa, and 1900 kPa, and extract the load-sag relationship curves of non-reference tire B under different pressures, such as... Figure 4 As shown. By according to Figure 4 The analytical formula corresponding to the curve shown is U B =f(F B ,P B Are they similar? If they are similar, it means that the above U B =f(F B ,P B This expression is accurate.

[0085] Therefore, given that the target load radius of non-reference tires B1 and B2 is 705.84 mm (i.e., the inflation radius of reference tire A at 1200 kPa minus the sinkage), the required air pressure P for non-reference tires B1 and B2 to reach the target load radius of 705.84 mm can be calculated. B1 =P B2 ≈1400kPa.

[0086] Furthermore, while non-reference tires A1 and A2 share the same structure and materials as the reference tires A3-A8 on the load-bearing wheel positions, they experience different loads. Therefore, while ensuring... Figure 2When all tires in the vehicle shown have the same load radius, the non-reference tires A1 and A2 require different air pressures than the reference tires A3-A8. Therefore, static load tests can be performed on the non-reference tires A1 and A2 at different inflation pressures, while simultaneously measuring and recording their inflation radii at different pressures using a laser rangefinder. By performing linear fitting on the three data points, the linear relationship between the inflation radius and air pressure of the non-reference tires A1 and A2 can be obtained as R. A =f(P A ′ Next, the material and structural parameters of non-reference tires A1 and A2 are obtained, and combined with the F of non-reference tires A1 and A2. A1 =F A2 =12.5t, construct a linear relationship between the deflection and air pressure of non-reference tires B1 and B2:

[0087]

[0088] Therefore, given that the target load radius of non-reference tires A1 and A2 is 705.84 mm, the required air pressure P for non-reference tires A1 and A2 to reach the target load radius of 705.84 mm can be calculated. A1 =P A2 ≈1350kPa.

[0089] By using the above-mentioned method for adjusting tire pressure in vehicles with mixed tire loads, the required tire pressure for tires of different outer diameters to maintain the same load radius on the vehicle can be accurately calculated. This ensures that all wheels of the vehicle are balanced, effectively avoiding problems such as vehicle deviation and bumping caused by inconsistent tire load radii, significantly improving the safety and stability of vehicle driving, and reducing the risk of traffic accidents.

[0090] In addition, after adjusting the air pressure of the corresponding non-reference tires, the system can also establish a flexible and precise air pressure adjustment frame that can adapt to the needs of the vehicle under different load conditions.

[0091] Optionally, the system can obtain the air pressure of the reference tire and each non-reference tire in the target vehicle under different load weights, and fit the air pressure of the reference tire and each non-reference tire in the target vehicle under different load weights to obtain the air pressure relationship between each non-reference tire and the reference tire in the target vehicle under different load weights; and update the air pressure relationship using the standard air pressure of the reference tire of the target vehicle under the target load weight and the adjusted air pressure of each non-reference tire.

[0092] In other words, by maintaining a formula that can quickly calculate the reasonable tire pressure of non-reference tires based on the reference tire pressure, the system enables the target vehicle to quickly calculate the reasonable adjustment pressure of other non-reference tires under the corresponding load weight under different working conditions such as standard load and heavy load, knowing only the tire pressure of the reference tire. This ensures that the load radius of all tires on the vehicle is always consistent, achieving the optimal configuration of vehicle performance.

[0093] For example, targeting Figure 2 The system can fit the air pressure between non-reference tires B1-B2 and reference tires A3-A8 to establish a model, as shown in the image. Figure 5 The relationship between tire pressure of non-reference tires B1-B2 and reference tires A3-A8 under different load weights is shown in the formula P. B =f(P A ) = 0.0029P A +412. Therefore, in subsequent practical applications, when the tire pressure P of the reference tires A3-A8 is known... A Then, based on the above formula, the reasonable tire pressure P of non-reference tires B1-B2 under the corresponding vehicle load can be quickly calculated. B .

[0094] Example 2

[0095] According to an embodiment of this application, a tire pressure adjustment device for a tire-mixed vehicle, used to implement the tire pressure adjustment method for a tire-mixed vehicle in Embodiment 1, is also provided, such as... Figure 6 As shown, the tire pressure adjustment device for the mixed-tire vehicle includes at least: an acquisition module 62, a determination module 64, a calculation module 66, and an adjustment module 68, wherein:

[0096] The acquisition module 62 is used to acquire the vehicle load configuration information and tire specification information of the target vehicle, wherein the tire specification information includes at least the outer diameter of each tire in the target vehicle.

[0097] The determination module 64 is used to determine the load value of each tire in the target vehicle based on the vehicle load configuration information, and to determine the reference tire and non-reference tire in the target vehicle based on the tire specification information.

[0098] The calculation module 66 is used to calculate the target load radius of the reference tire based on the load value of the reference tire and the preset standard air pressure.

[0099] The adjustment module 68 is used to determine the adjustment air pressure required for each non-reference tire to reach the target load radius under the corresponding load value, and to adjust the air pressure of the corresponding non-reference tire using the adjustment air pressure.

[0100] The following section explains the functions of each module of the tire pressure adjustment device for vehicles with mixed tires, based on a specific implementation process.

[0101] First, module 62 acquires the vehicle load configuration information and tire specification information of the target vehicle, including:

[0102] Vehicle load configuration information refers to the load distribution of each axle on a target vehicle under a certain operating condition and its relationship with the tires, including but not limited to gross vehicle weight, axle configuration information, and axle wheel position information. Gross vehicle weight is the total weight of the vehicle after loading cargo; it equals the sum of the vehicle's unloaded weight and the target load weight, reflecting the load level of the vehicle in actual operation. Axle configuration information covers the type of axles on the vehicle (such as front drive axle, rear drive axle, trailing axle, load-bearing axle, etc.) and the geometric relationship between the axles and wheels (such as the position and length of the axles and the distance between the wheels), reflecting the force transmission path and contact method between the axles and tires. Axle wheel position information clarifies the number and specific location of tires installed on each axle of the vehicle, which is crucial for determining the actual load borne by each tire.

[0103] Tire specifications refer to key data related to tire performance, including but not limited to tire model, physical dimensions, structural parameters (such as sidewall cross-sectional area, radius of curvature, arc angle, moment of inertia, etc.), and material properties (such as rubber elastic modulus, rubber shear modulus, etc.). Among these physical dimensions, the most important is the tire's outer diameter, which is the straight-line distance from the edge of the rim to the highest point of the tread when the tire is not under load.

[0104] Next, the determination module 64 can determine the load value of each tire in the target vehicle based on the vehicle load configuration information, and determine the reference tire and non-reference tire in the target vehicle based on the tire specification information.

[0105] Optionally, the determining module 64 can determine the load values ​​of each tire in the target vehicle in the following ways:

[0106] Step 1: Based on the total mass and axle configuration information of the target vehicle, determine the load values ​​on each axle of the target vehicle using the principles of mechanical balance and torque balance.

[0107] Step 2: Determine the number of tires on each axle of the target vehicle based on the axle wheel position information.

[0108] Step 3: Divide the load value on each axle by the number of tires on the corresponding axle to obtain the load value of the tires deployed on each axle of the target vehicle.

[0109] Furthermore, the determining module 64 can determine the reference tires and non-reference tires in the target vehicle in the following ways:

[0110] Step 1: Determine the outer diameter of each tire in the target vehicle based on the tire specification information, and determine the number of tires corresponding to each outer diameter;

[0111] Step 2: Select the tire with the largest number of tires corresponding to the target outer diameter as the reference tire, and select the tires with other outer diameters in the target vehicle that are not the target outer diameter as non-reference tires.

[0112] Then, the calculation module 66 can calculate the target load radius of the reference tire based on the load value of the reference tire and the preset standard air pressure.

[0113] Optionally, the calculation module 66 can calculate the target load radius of the reference tire as follows:

[0114] Step 1: Determine the material and structural parameters of the reference tire, and calculate the radial stiffness and tensile stiffness of the reference tire in combination with the standard tire pressure. The material parameters should include at least the rubber elastic modulus and rubber shear modulus, and the structural parameters should include at least the sidewall cross-sectional area, sidewall radius of curvature, sidewall angle, and sidewall inertia matrix.

[0115] Step 2: Divide the load value of the reference tire by the sum of its radial stiffness and tensile stiffness to obtain the deflection of the reference tire.

[0116] Step 3: Obtain the inflation radius of the reference tire under standard air pressure, and subtract the sinking amount from the inflation radius to obtain the target load radius of the reference tire.

[0117] Finally, the adjustment module 68 can determine the adjustment air pressure required for each non-reference tire to reach the target load radius under the corresponding load value, and adjust the air pressure of the corresponding non-reference tire using the adjustment air pressure.

[0118] Optionally, the adjustment module 68 can determine the adjustment air pressure required for each non-reference tire to reach the target load radius under the corresponding load value in the following manner:

[0119] Step 1: For each non-reference tire, obtain the linear relationship between the inflation radius and air pressure of the non-reference tire.

[0120] In the technical solution provided in the first step above, the method may include: constructing a tire finite element model of a non-reference tire; performing inflation simulation on the tire finite element model to obtain the inflation radius of the non-reference tire under different air pressures; and performing linear fitting on the inflation radius of the non-reference tire under different air pressures to obtain a linear relationship between the inflation radius and air pressure of the non-reference tire.

[0121] Step 2: Obtain the material and structural parameters of the non-reference tire, and construct a linear relationship between the deflection of the non-reference tire and the air pressure by combining the load value of the non-reference tire.

[0122] Step 3: Use the linear relationship between the inflation radius and air pressure of the non-reference tire as the subtrahend, the linear relationship between the sinkage and air pressure of the non-reference tire as the minuend, and the target load radius as the difference to construct the target equation.

[0123] Step 4: Solve the objective equation to obtain the adjustment air pressure required for the non-reference tire to reach the target load radius under the corresponding load value.

[0124] In addition, after adjusting the air pressure of the corresponding non-reference tire using the air pressure adjustment module 68, it can also establish a flexible and precise air pressure adjustment frame that can adapt to the needs of the vehicle under different load conditions.

[0125] Optionally, the adjustment module 68 can obtain the air pressure of the reference tire and each non-reference tire in the target vehicle under different load weights, and fit the air pressure of the reference tire and each non-reference tire in the target vehicle under different load weights to obtain the air pressure relationship between each non-reference tire and the reference tire in the target vehicle under different load weights; and update the air pressure relationship using the standard air pressure of the reference tire of the target vehicle under the target load weight and the adjusted air pressure of each non-reference tire.

[0126] It should be noted that each module in the tire pressure adjustment device of the tire-mixed vehicle in this embodiment corresponds one-to-one with each implementation step of the tire pressure adjustment method of the tire-mixed vehicle in Embodiment 1. Since Embodiment 1 has been described in detail, some details not shown in this embodiment can be referred to Embodiment 1, and will not be elaborated further here.

[0127] Example 3

[0128] According to an embodiment of this application, a computer program product is also provided, which includes a computer program, wherein when the computer program is executed by a processor, it implements the tire pressure adjustment method for a vehicle with mixed tires in Embodiment 1.

[0129] According to an embodiment of this application, a non-volatile storage medium is also provided, which includes a stored computer program, wherein the device containing the non-volatile storage medium executes the tire pressure adjustment method for a tire-mixed vehicle in Embodiment 1 by running the computer program.

[0130] According to an embodiment of this application, a processor is also provided for running a computer program, wherein the computer program executes the tire pressure adjustment method for a vehicle with mixed tires in Embodiment 1.

[0131] According to an embodiment of this application, an electronic device is also provided, comprising: a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the tire pressure adjustment method for a tire-mixed vehicle in Embodiment 1 via the computer program.

[0132] Specifically, the computer program executes the following steps during runtime: obtaining vehicle load configuration information and tire specification information of the target vehicle, wherein the tire specification information includes at least the outer diameter of each tire in the target vehicle; determining the load value of each tire in the target vehicle based on the vehicle load configuration information, and determining the reference tire and non-reference tires in the target vehicle based on the tire specification information; calculating the target load radius of the reference tire based on the load value of the reference tire and the preset standard air pressure; determining the adjustment air pressure required for each non-reference tire to reach the target load radius under the corresponding load value, and adjusting the air pressure of the corresponding non-reference tire using the adjustment air pressure.

[0133] As an alternative implementation, the above-mentioned electronic device may exist in the form of a mobile terminal, a computer terminal, or a similar computing device. Figure 7 A hardware block diagram of a computer terminal for implementing a tire pressure adjustment method for vehicles with mixed tire loads is shown. Figure 7 As shown, the computer terminal 70 may include one or more processors 702 (shown as 702a, 702b, ..., 702n in the figure) 702 (processor 702 may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.), a memory 704 for storing data, and a transmission device 706 for communication functions. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of a BUS bus), a network interface, a power supply, and / or a camera. Those skilled in the art will understand that... Figure 7 The structure shown is for illustrative purposes only and does not limit the structure of the computer terminal described above. For example, computer terminal 70 may also include... Figure 7 The more or fewer components shown, or having the same Figure 7 The different configurations shown.

[0134] It should be noted that the aforementioned one or more processors 702 and / or other data processing circuits are generally referred to herein as "data processing circuits". These data processing circuits may be embodied, in whole or in part, in software, hardware, firmware, or any other combination thereof. Furthermore, the data processing circuits may be a single, independent processing module, or may be integrated, in whole or in part, into any other element within the computer terminal 70. As involved in the embodiments of this application, the data processing circuits serve as processor control (e.g., selection of a variable resistor termination path connected to an interface).

[0135] The memory 704 can be used to store software programs and modules of application software, such as the program instructions / data storage device corresponding to the tire pressure adjustment method for a tire-mixed vehicle in this embodiment of the application. The processor 702 executes various functional applications and data processing by running the software programs and modules stored in the memory 704, thereby implementing the aforementioned application vulnerability detection method. The memory 704 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 704 may further include memory remotely located relative to the processor 702, and these remote memories can be connected to the computer terminal 70 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0136] The transmission device 706 is used to receive or send data via a network. Specific examples of the network described above may include a wireless network provided by the communication provider of the computer terminal 70. In one example, the transmission device 706 includes a Network Interface Controller (NIC), which can connect to other network devices via a base station to communicate with the Internet. In another example, the transmission device 706 may be a Radio Frequency (RF) module, used for wireless communication with the Internet.

[0137] The display may be, for example, a touchscreen liquid crystal display (LCD) that allows the user to interact with the user interface of the computer terminal 70.

[0138] The sequence numbers of the above embodiments are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0139] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0140] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0141] The units described as separate components may or may not be physically separate. Similarly, the components shown as units may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0142] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0143] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0144] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for adjusting tire pressure in a vehicle with mixed tire loads, characterized in that, include: Obtain the vehicle load configuration information and tire specification information of the target vehicle, wherein the tire specification information includes at least the outer diameter of each tire in the target vehicle; The load values ​​of each tire in the target vehicle are determined based on the vehicle load configuration information, and the reference tires and non-reference tires in the target vehicle are determined based on the tire specification information. Based on the load value of the reference tire and the preset standard air pressure, the target load radius of the reference tire is calculated, including: determining the material parameters and structural parameters of the reference tire, and calculating the radial stiffness and tensile stiffness of the reference tire in combination with the standard air pressure, wherein the material parameters include at least: rubber elastic modulus and rubber shear modulus, and the structural parameters include at least: sidewall cross-sectional area, sidewall radius of curvature, sidewall angle, and sidewall inertia matrix; dividing the load value of the reference tire by the sum of the radial stiffness and the tensile stiffness to obtain the sinking of the reference tire; obtaining the inflation radius of the reference tire under the standard air pressure, and subtracting the sinking from the inflation radius to obtain the target load radius of the reference tire; Determine the adjustment pressure required for each of the non-reference tires to reach the target load radius under the corresponding load value, and adjust the tire pressure of the corresponding non-reference tires using the adjustment pressure; Determining the adjustment air pressure required for each of the non-reference tires to reach the target load radius under the corresponding load value includes: for each non-reference tire, obtaining the linear relationship between the inflation radius and air pressure of the non-reference tire; obtaining the material parameters and structural parameters of the non-reference tire, and constructing a non-linear relationship between the deflection of the non-reference tire and air pressure in combination with the load value of the non-reference tire; using the linear relationship between the inflation radius and air pressure of the non-reference tire as the subtrahend, the non-linear relationship between the deflection of the non-reference tire and air pressure as the minuend, and the target load radius as the difference, constructing a target equation; solving the target equation to obtain the adjustment air pressure required for the non-reference tire to reach the target load radius under the corresponding load value.

2. The method according to claim 1, characterized in that, The vehicle load configuration information includes at least: total mass, axle configuration information reflecting the type of axles and the geometric relationship between the axles and wheels, and axle wheel position information reflecting the number of tires on each axle of the vehicle. The total mass is equal to the sum of the unloaded weight of the target vehicle and the target load weight. Determining the load value of each tire in the target vehicle based on the vehicle load configuration information includes: Based on the total mass of the target vehicle and the axle configuration information, the load values ​​on each axle of the target vehicle are determined using the principles of mechanical balance and torque balance. The number of tires on each axle of the target vehicle is determined based on the axle wheel position information; The load values ​​of the tires deployed on each axle of the target vehicle are obtained by dividing the load values ​​on each axle by the number of tires on the corresponding axle.

3. The method according to claim 1, characterized in that, Determining the reference tires and non-reference tires in the target vehicle based on the tire specification information includes: Based on the tire specification information, determine the outer diameter of each tire in the target vehicle, and determine the number of tires corresponding to each outer diameter; The tire with the largest number of tires corresponding to the target outer diameter is taken as the reference tire, and the tires with other outer diameters in the target vehicle besides the target outer diameter are taken as the non-reference tires.

4. The method according to claim 1, characterized in that, Obtaining the linear relationship between the inflation radius and air pressure of the non-reference tire includes: Construct the tire finite element model of the non-reference tire; Inflation simulation was performed on the tire finite element model to obtain the inflation radius of the non-reference tire under different air pressures; Linear fitting was performed on the inflation radius of the non-reference tire under different air pressures to obtain the linear relationship between the inflation radius and air pressure of the non-reference tire.

5. The method according to claim 1, characterized in that, After adjusting the tire pressure of the corresponding non-reference tire using the aforementioned adjustable tire pressure, the method further includes: The air pressure of the reference tire and each non-reference tire in the target vehicle under different load weights is obtained, and the air pressure of the reference tire and each non-reference tire in the target vehicle under different load weights is fitted to obtain the air pressure relationship between each non-reference tire and the reference tire in the target vehicle under different load weights. Using the air pressure relationship of the target vehicle under the target load weight and the air pressure of the reference tire of the target vehicle under the target load weight, the air pressure of each non-reference tire of the target vehicle under the target load weight is determined to maintain the consistency of the load radius of all tires on the target vehicle.

6. A tire pressure adjustment device for a vehicle with mixed tires, characterized in that, include: The acquisition module is used to acquire vehicle load configuration information and tire specification information of the target vehicle, wherein the tire specification information includes at least the outer diameter of each tire in the target vehicle; The determination module is used to determine the load value of each tire in the target vehicle based on the vehicle load configuration information, and to determine the reference tire and non-reference tire in the target vehicle based on the tire specification information. The calculation module is used to calculate the target load radius of the reference tire based on the load value of the reference tire and the preset standard air pressure. This includes: determining the material parameters and structural parameters of the reference tire, and calculating the radial stiffness and tensile stiffness of the reference tire in conjunction with the standard air pressure. The material parameters include at least the rubber elastic modulus and rubber shear modulus, and the structural parameters include at least the sidewall cross-sectional area, sidewall radius of curvature, sidewall angle, and sidewall inertia matrix. The module also includes dividing the load value of the reference tire by the sum of the radial stiffness and the tensile stiffness to obtain the sinking amount of the reference tire; obtaining the inflation radius of the reference tire under the standard air pressure, and subtracting the sinking amount from the inflation radius to obtain the target load radius of the reference tire. An adjustment module is used to determine the adjustment air pressure required for each of the non-reference tires to reach the target load radius under the corresponding load value, and to adjust the air pressure of the corresponding non-reference tires using the adjustment air pressure; Determining the adjustment air pressure required for each of the non-reference tires to reach the target load radius under the corresponding load value includes: for each non-reference tire, obtaining the linear relationship between the inflation radius and air pressure of the non-reference tire; obtaining the material parameters and structural parameters of the non-reference tire, and constructing a non-linear relationship between the deflection of the non-reference tire and air pressure in combination with the load value of the non-reference tire; using the linear relationship between the inflation radius and air pressure of the non-reference tire as the subtrahend, the non-linear relationship between the deflection of the non-reference tire and air pressure as the minuend, and the target load radius as the difference, constructing a target equation; solving the target equation to obtain the adjustment air pressure required for the non-reference tire to reach the target load radius under the corresponding load value.

7. A computer program product, characterized in that, include: A computer program, wherein when executed by a processor, the computer program implements the tire pressure adjustment method for a vehicle with mixed tires as described in any one of claims 1 to 5.

8. An electronic device, characterized in that, include: A memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute, via the computer program, the tire pressure adjustment method for a tire-mixed vehicle according to any one of claims 1 to 5.

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