Tire pressure adjusting method and device for tire mixed loading vehicle

Abstract

The invention discloses a tire pressure adjusting method and device for a tire mixed loading vehicle. The method comprises the steps that vehicle load configuration information and tire specification information of a target vehicle are obtained, and the tire specification information at least comprises the outer diameter of each tire in the target vehicle; determining a load value of each tire in the target vehicle according to the vehicle load configuration information, and determining a reference tire and a non-reference tire in the target vehicle according to the tire specification information; calculating a target load radius of the reference tire according to the load value of the reference tire and a preset standard air pressure; and determining the adjustment air pressure required by 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 by using the adjustment air pressure. The technical problem that related calculation cannot quickly and accurately adjust the air pressure of tires with different outer diameters in a tire mixed loading vehicle is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tire engineering, in particular, relates to a tire pressure adjustment method and device for a tire mixed loading vehicle. BACKGROUND

[0002] In the transportation industry, especially in the application scenarios of heavy-duty cargo vehicles, in order to meet various complex load requirements, different outer diameter tires can be mixed and loaded on the same vehicle in different combinations. When different outer diameter tires are mixed and loaded on the same vehicle, if the tire load radii are inconsistent, the vehicle will experience uneven stress during driving, which not only seriously affects the stability of the vehicle and increases the difficulty of control, but also causes abnormal wear of the tires and significantly shortens the service life of the tires. Therefore, in order to ensure the smooth driving of the vehicle, the air pressure of the different outer diameter tires under the same load radius can be adjusted.

[0003] Currently, for the tire pressure adjustment in the above-mentioned situation, the related technology usually adopts experimental testing or theoretical calculation. However, experimental testing needs to test different outer diameter tires under all working conditions, which has the disadvantages of long time consumption and high cost. Theoretical calculation lacks universality and fast solving ability, and cannot meet the demand of efficiently and accurately obtaining tire pressure in actual engineering.

[0004] At present, there is no effective solution to the above-mentioned problems. SUMMARY

[0005] The embodiments of the present application provide a tire pressure adjustment method and device for a tire mixed loading vehicle, to at least solve the technical problem that related calculation cannot quickly and accurately adjust the air pressure of different outer diameter tires in a tire mixed loading vehicle.

[0006] According to an aspect of an embodiment of the present application, a tire pressure adjustment method for a tire mixed loading vehicle is provided, comprising: obtaining vehicle load configuration information and tire specification information of a target vehicle, wherein the tire specification information at least includes 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 the 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 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 by using the adjustment air 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, the linear relationship between the inflated radius and the air pressure of the non-reference tire is obtained by: constructing a tire finite element model of the non-reference tire; performing an inflation simulation on the tire finite element model to obtain the inflated radius of the non-reference tire under different air pressures; and performing linear fitting on the inflated radius of the non-reference tire under different air pressures to obtain the linear relationship between the inflated radius and the air pressure of the non-reference tire.

[0012] Optionally, after the air pressure of the corresponding non-reference tire is adjusted by using the adjustment air pressure, the method further comprises: 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 an 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 by 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 the present application, a tire air pressure adjustment device for a tire mixed loading vehicle is also provided, comprising: an obtaining module configured to obtain vehicle load configuration information and tire specification information of a target vehicle, wherein the tire specification information at least comprises an outer diameter of each tire in the target vehicle; a determining module configured to determine load values of each tire in the target vehicle according to the vehicle load configuration information, and determine a reference tire and non-reference tires in the target vehicle according to the tire specification information; a calculating module configured to calculate a target load radius of the reference tire according to the load value of the reference tire and a preset standard air pressure; and an adjusting module configured to determine adjustment air pressures required by each non-reference tire to reach the target load radius under corresponding load values, and adjust air pressures of the corresponding non-reference tires by using the adjustment air pressures.

[0014] According to another aspect of the embodiments of the present application, a computer program product is also provided, which comprises: a computer program, wherein the computer program is executed by a processor to implement the tire air pressure adjustment method for a tire mixed loading vehicle.

[0015] According to another aspect of the embodiments of the present application, an electronic device is also provided, which comprises: a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the tire air pressure adjustment method for a tire mixed loading vehicle by using the computer program.

[0016] In the embodiment of the present application, the vehicle load configuration information and the tire specification information of the target vehicle are obtained, wherein the tire specification information at least includes the outer diameter of each tire in the target vehicle; the load value of each tire in the target vehicle is determined according to the vehicle load configuration information, and the reference tire and the non-reference tire in the target vehicle are determined according to the tire specification information; the target load radius of the reference tire is calculated according to the load value of the reference tire and the preset standard air pressure; the adjustment air pressure required for each non-reference tire to reach the target load radius under the corresponding load value is determined, and the air pressure of the corresponding non-reference tire is adjusted by using the adjustment air pressure. By analyzing the dynamic relationship between the load radius and the air pressure of the tire, it is ensured that in the case of mixed loading of tires with different outer diameters, the air pressure can still be accurately adjusted to ensure that the tires with different outer diameters on the same vehicle can all reach a unified load radius, thereby maintaining the stability and safety of vehicle driving, and thus solving the technical problem that related calculations cannot quickly and accurately adjust the air pressure of different outer diameter tires in a mixed loading vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings described herein are used to provide further understanding of the present application, and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation on the present application. In the drawings:

[0018] Figure 1 is a flow diagram of an optional tire air pressure adjustment method for a mixed loading vehicle according to an embodiment of the present application;

[0019] Figure 2 is a schematic diagram of an optional mixed loading vehicle according to an embodiment of the present application;

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

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

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

[0023] Figure 6 is a structural schematic diagram of an optional tire air pressure adjustment device for a mixed loading vehicle according to an embodiment of the present application;

[0024] Figure 7 is a hardware structural schematic diagram of an optional computer terminal for implementing a tire air pressure adjustment method for a mixed loading vehicle according to an embodiment of the present 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 by 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 scheme defined in steps S102 to S108, it can be known that in the embodiments of the present application, by analyzing the dynamic relationship between the load radius and the air pressure of the tire, it is ensured that in the case of mixed loading of different outer diameter tires, the air pressure can still be accurately adjusted to ensure that the tires of different outer diameters on the same vehicle can all reach a unified load radius, thereby maintaining the stability and safety of the vehicle during driving.

[0035] The steps of the tire air pressure adjustment method for the mixed loading vehicle will be described below in combination with a specific implementation process.

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

[0037] The vehicle load configuration information refers to the load distribution of each axle of the target vehicle under a certain working condition and the relationship between the load and the tire, including but not limited to total mass, axle configuration information, and axle position information. The total mass is the overall weight of the vehicle after loading the goods, which is equal to the sum of the empty weight of the vehicle and the target load weight, and can reflect the load level of the vehicle in actual operation. The axle configuration information covers the types of axles on the vehicle (such as front drive axle, rear drive axle, follow-up axle, load-bearing axle, etc.), as well as the geometric relationship between the axle and the wheel (such as the position, length of the axle, and the distance between the wheels, etc.), which can reflect the force transmission path and contact mode between the axle and the tire. The axle position information clearly indicates the number and specific position of the tires installed on each axle of the vehicle, which is crucial for determining the actual load borne by each tire.

[0038] The tire specification information refers to the key data related to the performance of the tire, including but not limited to the model, physical size, structural parameters (such as cross-sectional area of the tire side, circular arc radius of curvature, circular arc angle, moment of inertia, etc.), material properties (such as rubber elastic modulus, rubber shear modulus, etc.). Among them, the most important physical size is the outer diameter of the tire, which is the straight-line distance from the rim edge to the highest point of the tire under no load, and even if the nominal specifications of different brands or models of tires are the same, the actual outer diameter may still differ.

[0039] In the technical scheme provided in step S104, the system can determine the load value of each tire in the target vehicle according to the vehicle load configuration information, and determine the reference tire and the non-reference tire in the target vehicle according to 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 the above step S104, the system can also determine the reference tire and the non-reference tire in the target vehicle according to the following method, comprising:

[0047] First step: determine the outer diameter of each tire in the target vehicle according to the tire specification information, and determine the number of tires corresponding to each outer diameter;

[0048] Second step: take the tire corresponding to the target outer diameter with the largest number of tires as the reference tire, and take the tires corresponding to the outer diameters other than the target outer diameter in the target vehicle as the non-reference tires.

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

[0050] In addition to the above-mentioned several implementation schemes, based on the basic idea of the present application, those skilled in the art can also determine the reference tire and the non-reference tire through other technical solutions, for example, defining the reference tire and the non-reference tire based on the load capacity of the tire, defining the reference tire and the non-reference tire based on the position of the tire, etc., which should also be within the protection scope of the present application.

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

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

[0053] First step: determine the material parameters and structure parameters of the reference tire, and calculate the radial stiffness and tensile stiffness of the reference tire respectively combined with the standard air pressure, wherein the material parameters at least include: rubber elastic modulus, rubber shear modulus, and the structure parameters at least include: tire side cross-sectional area, tire side arc curvature radius, tire side arc angle, and tire side inertia matrix.

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

[0055]

[0056] In the formula, r represents the curvature radius of the sidewall arc of the reference tire, φ represents the sidewall arc angle of the reference tire, I represents the sidewall moment of inertia 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 of the extension stiffness of the reference tire can be written as:

[0058]

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

[0060] Second step: divide the load value of the reference tire by the sum of the radial stiffness and the extension stiffness to obtain the deflection of the reference tire. Therefore, the expression of the deflection of the reference tire can be written as:

[0061]

[0062] Third step: obtain the inflated radius of the reference tire under the standard air pressure, and subtract the deflection from the inflated radius to obtain the target load radius of the reference tire.

[0063] Wherein, as for the inflated radius of the reference tire under the standard air pressure, it can be obtained by applying the standard air pressure to the finite element model of the reference tire to perform inflation simulation, so as to obtain the inflated radius of the reference tire under the standard air pressure. Alternatively, the radius of the reference tire after being inflated under the standard air pressure can be measured by a laser range finder or other measuring tools.

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

[0065] For example, Figure 2 As shown in the target vehicle, since the number of tires A on the axles Q2 and Q3 is the largest and the load is consistent, tires A3-A8 are taken as the reference tires.

[0066] The standard air pressure 1200kPa is applied to the tires A3-A8 on the axles Q2 and Q3, and according to the load values of the tires A3-A8, the standard air pressure, and the material parameters and structure parameters, the sinking amount of the tires A3-A8 can be calculated as 59.46mm; then the inflated radii of the tires A3-A8 under the air pressure 1200kPa are measured by the laser range finder, and are all 765.3mm; finally, the inflated radius 765.3mm is subtracted from the sinking amount 59.46mm, and the load radius of the reference tires A3-A8 is obtained as 705.84mm.

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

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

[0069] First step: for each non-reference tire, the linear relationship between the inflated radius and the air pressure of the non-reference tire is obtained.

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

[0071] Specifically, the system can first obtain the geometric parameters (which reflect the physical size and structure characteristics of the tire) and the material parameters (which are key factors affecting the mechanical behavior of the tire) of the non-reference tire, wherein the geometric parameters at least include: the outer diameter, the inner diameter, the cross-sectional width, the rim diameter, the thickness of each layer in the tire structure, etc., and the material parameters at least include: the elastic modulus, the Poisson's ratio, the density; then, according to the geometric parameters, a geometric model of the tire sample is constructed by using a professional finite element modeling software, and the material parameters are assigned to the corresponding positions of the geometric model to obtain the tire finite element model of the non-reference tire. Then, different sizes of air pressure are applied in the cavity of the tire finite element model to simulate the behavior of the non-reference tire under different inflation states, and the inflated radius of the non-reference tire under different air pressures is obtained. Finally, the system sorts the inflated radii under different air pressures obtained by simulation, and analyzes these sorted data by using a linear fitting method (such as the least squares method) in statistics to obtain a linear equation that can describe the relationship between the two, such as R 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) as the linear relationship between the inflated radius and the air pressure of the non-reference tire.

[0072] That is, the system uses finite element analysis technology to convert the complex mechanical behavior of the non-reference tire into a series of inflated radius data that is easy to analyze. By linearly fitting these data, a simplified mathematical model is established, which clearly reflects the law of change of inflated radius with air pressure.

[0073] Second step: Obtain the material parameters and structural parameters of the non-reference tire, and combine the load value of the non-reference tire to construct the linear relationship between the deflection and the air pressure of the non-reference tire.

[0074] Among them, the linear relationship between the deflection and the air pressure of the non-reference tire can be expressed as:

[0075]

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

[0077] Third step: Take the linear relationship between the inflated radius and the air pressure of the non-reference tire as the minuend, the linear relationship between the deflection and the air pressure of the non-reference tire as the subtrahend, and the target load radius as the difference, and construct the target equation. Therefore, the expression of 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] Among them, the above target equation only contains P 非基准轮胎 this unknown quantity.

[0080] Fourth step: Solve 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.

[0081] In the above embodiment, 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 by constructing the target equation according to the linear relationship between the inflated radius and the air pressure of the non-reference tire, and the linear relationship between the deflection and the air pressure. Therefore, the system can adjust the air pressure of the corresponding tire according to the calculated adjustment air pressure.

[0082] For example, for 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 sinkage 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 2The load radius of all tires in the vehicle is the same, and the non-reference tires A1 and A2 have different air pressures required by the reference tires A3-A8. Therefore, the static load experiment of the non-reference tires A1 and A2 under different inflation pressures can be carried out in turn, and the inflation radius of the non-reference tires A1 and A2 under different air pressures is measured and recorded at the same time by using the laser range finder. By linear fitting of three points, the linear relationship between the inflation radius and the air pressure of the non-reference tires A1 and A2 is obtained as R A = f(P A ′ ). Then, the material parameters and structure parameters of the non-reference tires A1 and A2 are obtained, and the F A1 = F A2 = 12.5t, and the linear relationship between the sinking amount and the air pressure of the non-reference tires B1 and B2 is constructed as:

[0087]

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

[0089] By the above-mentioned tire air pressure adjustment method of the tire mixed vehicle, the air pressure required by different outer diameter tires to keep the load radius consistent on the vehicle can be accurately solved, so that the vehicle can keep balance at each wheel position, effectively avoid the problems of vehicle deviation and bumping caused by inconsistent load radius of tires, and significantly improve the safety and stability of vehicle driving, and reduce the risk of traffic accidents.

[0090] In addition, after adjusting the air pressure of the corresponding non-reference tire by using the adjustment air pressure, the system can also establish a flexible and accurate air pressure adjustment framework which 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 by 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] That is, the system can make the target vehicle maintain the load radius consistency of all tires on the vehicle and achieve the optimal configuration of vehicle performance by maintaining a relationship that can quickly calculate the reasonable air pressure of the non-reference tire under the corresponding load weight of the reference tire air pressure, under different working conditions such as light load and heavy load, and by knowing only the air pressure of the reference tire.

[0093] For example, for the vehicle shown in Figure 2 , the system can fit the air pressure between the non-reference tires B1-B2 and the reference tires A3-A8, and establish a relationship P Figure 5 between the air pressure of the non-reference tires B1-B2 and the reference tires A3-A8 under different load weights as shown in B . A = 0.0029P A + 412. Therefore, when the air pressure P A of the reference tires A3-A8 is known in subsequent actual application scenarios, the reasonable air pressure P B of the non-reference tires B1-B2 under the corresponding vehicle load can be quickly calculated according to the above relationship.

[0094] Embodiment 2

[0095] According to the embodiments of the present application, a tire pressure adjustment device for a tire mixed vehicle is also provided for implementing the tire pressure adjustment method of the tire mixed vehicle in Embodiment 1, as shown in Figure 6 , the tire pressure adjustment device for the tire mixed vehicle at least includes an acquisition module 62, a determination module 64, a calculation module 66, and an adjustment module 68, wherein:

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

[0097] The determination module 64 is configured to determine the load values of each tire in the target vehicle according to the vehicle load configuration information, and determine the reference tires and the non-reference tires in the target vehicle according to the tire specification information.

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

[0099] The adjustment module 68 is configured to determine the adjustment air pressure required by 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 by using the adjustment air pressure.

[0100] The functions of each module of the tire pressure adjustment device of the tire mixed loading vehicle are described below in combination with a specific implementation process.

[0101] Firstly, the acquisition module 62 acquires the vehicle load configuration information and the tire specification information of the target vehicle, wherein:

[0102] The vehicle load configuration information refers to the load distribution of each axle of the target vehicle under a certain working condition and the relationship between the load and the tire, including but not limited to the total mass, the axle configuration information and the axle wheel position information. The total mass is the overall weight of the vehicle after loading the goods, which is equal to the sum of the empty weight of the vehicle and the target load weight, and can reflect the load level of the vehicle in actual operation. The axle configuration information covers the types of axles on the vehicle (such as front drive axle, rear drive axle, follow-up axle, load-bearing axle, etc.), and the geometric relationship between the axle and the wheel (such as the position, length of the axle and the distance between the wheels, etc.), which can reflect the force transmission path and contact mode between the axle and the tire. The axle wheel position information clearly shows the number and specific position of the tires installed on each axle of the vehicle, which is crucial for determining the actual load borne by each tire.

[0103] The tire specification information refers to the key data related to the performance of the tire, including but not limited to the model, physical size, structural parameters (such as cross-sectional area of the tire side, radius of circular arc, angle of circular arc, moment of inertia, etc.), material properties (such as rubber elastic modulus, rubber shear modulus, etc.) of the tire. Among them, the most important physical size is the outer diameter of the tire, which is the straight-line distance from the rim edge to the highest point of the tire tread when the tire is not under load.

[0104] Then, the determination module 64 can determine the load values of each tire in the target vehicle according to the vehicle load configuration information, and determine the reference tire and the non-reference tire in the target vehicle according to the tire specification information.

[0105] Optionally, the determination module 64 can determine the load values of each tire in the target vehicle by the following method, including:

[0106] First step: based on the total mass and the axle configuration information of the target vehicle, the load values of each axle in the target vehicle are determined by using the mechanical equilibrium principle and the moment balance principle.

[0107] Second step: the number of tires on each axle in the target vehicle is determined according to the axle wheel position information.

[0108] Third step: the load values of the tires deployed on each axle in the target vehicle are obtained by dividing the load values of each axle by the number of tires on the corresponding axle.

[0109] Further, the determining module 64 can determine the reference tire and the non-reference tire in the target vehicle according to the following method, comprising:

[0110] First step: determine the outer diameter of each tire in the target vehicle according to the tire specification information, and determine the number of tires corresponding to each outer diameter;

[0111] Second step: take the tire corresponding to the target outer diameter with the largest number of tires as the reference tire, and take the tires corresponding to the outer diameters other than the target outer diameter in the target vehicle as the non-reference tires.

[0112] Then, the calculating module 66 can calculate the target load radius of the reference tire according to the load value of the reference tire and the preset standard air pressure.

[0113] Optionally, the calculating module 66 can calculate the target load radius of the reference tire according to the following method:

[0114] First step: determine the material parameters and structure parameters of the reference tire, and calculate the radial stiffness and the stretching stiffness of the reference tire respectively combined with the standard air pressure, wherein the material parameters at least include the rubber elastic modulus and the rubber shear modulus, and the structure parameters at least include the cross-sectional area of the tire side, the curvature radius of the tire side arc, the angle of the tire side arc, and the moment of inertia of the tire side.

[0115] Second step: divide the load value of the reference tire by the sum of the radial stiffness and the stretching stiffness to obtain the sinking amount of the reference tire.

[0116] Third step: obtain the inflated radius of the reference tire under the standard air pressure, and subtract the sinking amount from the inflated radius to obtain the target load radius of the reference tire.

[0117] Finally, the adjusting 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 by using the adjustment air pressure.

[0118] Optionally, the adjusting 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 according to the following method:

[0119] First step: for each non-reference tire, obtain the linear relationship between the inflated radius and the air pressure of the non-reference tire.

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

[0121] Second step: Obtain the material parameters and structure parameters of the non-reference tire, and combine the load value of the non-reference tire to construct the linear relationship between the sinking amount and the air pressure of the non-reference tire.

[0122] Third step: Take the linear relationship between the inflated radius and the air pressure of the non-reference tire as the minuend, take the linear relationship between the sinking amount and the air pressure of the non-reference tire as the subtrahend, and take the target load radius as the difference, and construct the target equation.

[0123] Fourth step: Solve the target equation to obtain the adjusted air pressure required by 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 by using the adjusted air pressure, the adjustment module 68 can also establish a flexible and accurate air pressure adjustment framework that can adapt to the needs of the vehicle under different load conditions.

[0125] Optionally, the adjustment module 68 can obtain the air pressures of the reference tire and each non-reference tire in the target vehicle under different load weights, and fit the air pressures of the reference tire and each non-reference tire in the target vehicle under different load weights to obtain an 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 by 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 air pressure adjustment device of the tire mixed loading vehicle in the embodiments of the present application corresponds to each implementation step of the tire air pressure adjustment method of the tire mixed loading vehicle in Embodiment 1. Since Embodiment 1 has been described in detail, the details not embodied in this embodiment can be referred to Embodiment 1, and will not be described in detail here.

[0127] Embodiment 3

[0128] According to the embodiments of the present application, a computer program product is also provided, which includes a computer program, wherein the computer program is executed by a processor to implement the tire air pressure adjustment method of the tire mixed loading vehicle in Embodiment 1.

[0129] According to the embodiments of the present application, a non-volatile storage medium is also provided, which includes a stored computer program, wherein a device in which the non-volatile storage medium is located executes the tire air pressure adjustment method of the tire mixed loading vehicle in Embodiment 1 by running the computer program.

[0130] According to an embodiment of the present application, a processor for running a computer program is further provided, wherein the computer program performs the tire pressure adjustment method for the tire mixed loading vehicle when running.

[0131] According to an embodiment of the present application, an electronic device is further provided, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to perform the tire pressure adjustment method for the tire mixed loading vehicle according to the embodiment 1 through the computer program.

[0132] Specifically, the computer program performs the following steps when running: obtaining vehicle load configuration information and tire specification information of a target vehicle, wherein the tire specification information at least comprises an outer diameter of each tire in the target vehicle; determining a load value of each tire in the target vehicle according to the vehicle load configuration information, and determining a reference tire and a non-reference tire in the target vehicle according to the tire specification information; calculating a target load radius of the reference tire according to the load value of the reference tire and a preset standard air pressure; determining an 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 by using the adjustment air pressure.

[0133] As an optional implementation, the electronic device can exist in the form of a mobile terminal, a computer terminal or a similar computing device. Figure 7 A hardware structure block diagram of a computer terminal for implementing the tire pressure adjustment method for the tire mixed loading vehicle is shown. As shown in Figure 7 the computer terminal 70 can include one or more (shown in the figure as 702a, 702b, …, 702n) processors 702 (the processor 702 can include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), a memory 704 for storing data, and a transmission device 706 for communication function. In addition, it can also include a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which can be included as one of the ports of the BUS bus), a network interface, a power supply and / or a camera. Those skilled in the art can understand that Figure 7 the structure shown is only schematic, and it does not limit the structure of the above-mentioned computer terminal. For example, the computer terminal 70 can include more or less components than those shown in Figure 7 , or have a different configuration from Figure 7 .

[0134] It should be noted that the one or more processors 702 and / or other data processing circuitry described above can be referred to herein generically as "data processing circuitry". The data processing circuitry can be embodied in whole or in part as software, hardware, firmware, or any combination thereof. In addition, the data processing circuitry can be a single standalone processing module, or it can be incorporated in whole or in part within any one of the other elements of the computer terminal 70. As referred to in the embodiments herein, the data processing circuitry acts as a processor to control, for example, the selection of the variable resistance terminal path in connection with the interface.

[0135] The memory 704 can be used to store software programs and modules for applications, such as program instructions / data storage for the tire pressure adjustment method for tire mixed-vehicle as described in the embodiments herein. The processor 702 can execute various functions and data processing by running the software programs and modules stored in the memory 704, i.e. implement the vulnerability detection method for the application program as described above. The memory 704 can include a high-speed random access memory, and can also include a non-volatile memory such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 704 can further include a memory disposed remotely with respect to the processor 702, which can be connected to the computer terminal 70 through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0136] The transmission device 706 is used to receive or send data via a network. Specific examples of the network can include a wireless network provided by a communication provider of the computer terminal 70. In one example, the transmission device 706 includes a network adapter (NIC) that can be connected to other network devices through a base station to communicate with the Internet. In one example, the transmission device 706 can be a radio frequency (RF) module for communicating with the Internet in a wireless manner.

[0137] The display can be, for example, a touch screen type liquid crystal display (LCD) that can enable a user to interact with the user interface of the computer terminal 70.

[0138] The above-mentioned embodiment numbers are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0139] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0140] In several embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other manners. The above described apparatus embodiments are merely exemplary, for example, the division of units can be different, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections can be indirect couplings or communication connections through some interfaces, access layers, or a component.

[0141] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments of the present application.

[0142] In addition, each functional unit in the embodiments of the present application can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

[0143] When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on such an understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: a U disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a mobile hard disk, a magnetic disk or an optical disk, and various other media that can store program codes.

[0144] The above is only the preferred embodiment of the present application, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present 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 tire pressure, calculate 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.

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, Based on the load value of the reference tire and the preset standard tire pressure, calculate the target load radius of the reference tire, including: The material parameters and structural parameters of the reference tire are determined, and the radial stiffness and tensile stiffness of the reference tire are calculated in combination 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 deflection of the reference tire is obtained by dividing the load value of the reference tire by the sum of the radial stiffness and the tensile stiffness. The inflation radius of the reference tire under the standard air pressure is obtained, and the sinking amount is subtracted from the inflation radius to obtain the target load radius of the reference tire.

5. The method according to claim 1, characterized in that, 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 of the non-reference tires, obtain the linear relationship between the inflation radius and the air pressure of the non-reference tire; 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. The linear relationship between the inflation radius and air pressure of the non-reference tire is used as the subtrahend, the linear relationship between the sinkage and air pressure of the non-reference tire is used as the minuend, and the target load radius is used as the difference to construct the target equation. 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.

6. The method according to claim 5, 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.

7. 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. The pressure relationship is updated using the standard tire pressure of the reference tires of the target vehicle under the target load weight and the adjusted tire pressures of each non-reference tire.

8. 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. 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.

9. 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 7.

10. 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 7.

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