Tire inflation pressure determination method, device and equipment and readable storage medium

Abstract

The invention provides a tire inflation pressure determining method, device and equipment and a readable storage medium. The method comprises the steps that the lower limit value of the tire inflation pressure is calculated according to the current tire temperature, the minimum predicted tire temperature and the minimum allowable tire pressure; the upper limit value of the tire inflation pressure is calculated according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure; if the lower limit value of the tire inflation pressure is smaller than or equal to the upper limit value of the tire inflation pressure, a recommended value of the tire inflation pressure is output, and the recommended value of the tire inflation pressure is larger than or equal to the lower limit value of the tire inflation pressure and smaller than or equal to the upper limit value of the tire inflation pressure. According to the method and the device, extreme conditions in a tire use scene are fully considered, and the condition that the tire pressure exceeds the allowable pressure range in the tire use process is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of tire inflation, and in particular to a method, device, equipment and readable storage medium for determining tire inflation pressure. Background Art

[0002] The tire pressure of a vehicle has a great impact on driving safety. Too high pressure will cause the tire to be at its own strength limit, increase the risk of tire blowout during driving, and also weaken the tire's grip, affecting the braking performance of the vehicle, and posing safety hazards to customers. Too low pressure will cause abnormal contact between the tire and the ground, resulting in poor tire stress, sidewall cracking, and even tire blowout and cracking, which will seriously affect the tire's service life and affect the fuel economy of the vehicle, resulting in additional cost investment for customers.

[0003] At present, most vehicle manufacturers will indicate the recommended inflation pressure value of the tire in the vehicle manual, and users can inflate the tire accordingly. In the related art, considering that the air temperature contained in the tire has a significant impact on its inflation pressure, when inflating the tire, the recommended inflation pressure value of the tire will be corrected with reference to the current temperature of the tire and the predicted temperature of the tire. However, the related art does not take into account the extreme situations in the tire use scenario, resulting in the tire pressure exceeding the allowable pressure range during the use of the tire. Summary of the invention

[0004] The present application provides a tire inflation pressure determination method, device, equipment and readable storage medium, which can solve the technical problem existing in the related art that the tire pressure exceeds the allowable pressure range during the use of the tire.

[0005] In a first aspect, an embodiment of the present application provides a method for determining tire inflation pressure, the method for determining tire inflation pressure comprising:

[0006] The lower limit of the tire inflation pressure is calculated based on the current tire temperature, the lowest predicted tire temperature and the lowest allowable tire pressure;

[0007] The upper limit of the tire inflation pressure is calculated based on the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure;

[0008] If the lower limit value of the tire inflation pressure is less than or equal to the upper limit value of the tire inflation pressure, a recommended value of the tire inflation pressure is output, wherein the recommended value of the tire inflation pressure is greater than or equal to the lower limit value of the tire inflation pressure and less than or equal to the upper limit value of the tire inflation pressure.

[0009] Furthermore, in one embodiment, after the step of calculating the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure, the step further includes:

[0010] If the lower limit value of the tire inflation pressure is greater than the upper limit value of the tire inflation pressure, a warning prompt is output.

[0011] Furthermore, in one embodiment, after the step of outputting the warning prompt, the following step is further included:

[0012] Based on the user operation, the lowest predicted tire temperature and / or the highest predicted tire temperature are modified.

[0013] Furthermore, in one embodiment, after the step of outputting the warning prompt, the following step is further included:

[0014] Based on the user operation, the minimum allowable tire pressure and / or the maximum allowable tire pressure are modified.

[0015] Furthermore, in one embodiment, the step of calculating the lower limit of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest allowable tire pressure includes:

[0016] The lower limit value of the tire inflation pressure is calculated according to the lower limit calculation formula. The lower limit calculation formula is:

[0017] P 0L =P rec-L *T0 / T L ;

[0018] Among them, P 0L is the lower limit of tire inflation pressure, P rec-L is the minimum permissible tire pressure, T0 is the current tire temperature, T L is the lowest predicted tire temperature, T0 and T L All are open circuit temperatures;

[0019] The step of calculating the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure comprises:

[0020] The upper limit value of the tire inflation pressure is calculated according to the upper limit calculation formula. The upper limit calculation formula is:

[0021] P 0H =P rec-H *T0 / T H ;

[0022] Among them, P 0H is the upper limit of tire inflation pressure, P rec-H is the maximum permissible tire pressure, T0 is the current tire temperature, T H is the maximum predicted tire temperature, T0 and T H All are open circuit temperatures.

[0023] Furthermore, in one embodiment, the tire inflation pressure determination method further includes:

[0024] Obtain the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature input by the user;

[0025] Detecting whether the ratio of the minimum allowable tire pressure to the minimum predicted tire temperature is less than or equal to the ratio of the maximum allowable tire pressure to the maximum predicted tire temperature;

[0026] If so, storing the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature;

[0027] If not, the user is prompted to re-enter the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature.

[0028] Furthermore, in one embodiment, before the step of calculating the lower limit of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest permissible tire pressure, the step further includes:

[0029] The lowest predicted tire temperature is calculated based on the lowest predicted ambient temperature and the maximum temperature drop of the tire;

[0030] Before the step of calculating the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure, the method further includes:

[0031] The maximum predicted temperature of the tire is calculated based on the maximum predicted ambient temperature and the maximum temperature rise of the tire.

[0032] In a second aspect, an embodiment of the present application further provides a tire inflation pressure determination device, the tire inflation pressure determination device comprising:

[0033] A lower limit calculation module, used for calculating the lower limit value of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest allowable tire pressure;

[0034] An upper limit calculation module, used to calculate the upper limit value of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure;

[0035] The recommendation output module is used to output a recommended value of the tire inflation pressure if the lower limit value of the tire inflation pressure is less than or equal to the upper limit value of the tire inflation pressure, wherein the recommended value of the tire inflation pressure is greater than or equal to the lower limit value of the tire inflation pressure and less than or equal to the upper limit value of the tire inflation pressure.

[0036] In a third aspect, an embodiment of the present application also provides a tire inflation pressure determination device, which includes a processor, a memory, and a tire inflation pressure determination program stored in the memory and executable by the processor, wherein when the tire inflation pressure determination program is executed by the processor, the steps of the above-mentioned tire inflation pressure determination method are implemented.

[0037] In a fourth aspect, an embodiment of the present application further provides a readable storage medium, on which a tire inflation pressure determination program is stored, wherein when the tire inflation pressure determination program is executed by a processor, the steps of the above-mentioned tire inflation pressure determination method are implemented.

[0038] In this application, the lower limit of the tire inflation pressure is calculated based on the current tire temperature, the lowest predicted tire temperature and the lowest permissible tire pressure; the upper limit of the tire inflation pressure is calculated based on the current tire temperature, the highest predicted tire temperature and the highest permissible tire pressure; if the lower limit of the tire inflation pressure is less than or equal to the upper limit of the tire inflation pressure, the recommended value of the tire inflation pressure is output, wherein the recommended value of the tire inflation pressure is greater than or equal to the lower limit of the tire inflation pressure and less than or equal to the upper limit of the tire inflation pressure. Through this application, the extreme situations in the tire use scenario are fully considered to avoid the situation where the tire pressure exceeds the permissible pressure range during the use of the tire. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic flow chart of a method for determining tire inflation pressure in an embodiment of the present application;

[0040] Figure 2 This is a schematic diagram of the functional modules of a device for determining tire inflation pressure in one embodiment of the present application;

[0041] Figure 3 This is a schematic diagram of the hardware structure of a tire inflation pressure determination device involved in the embodiment of the present application. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0044] In a first aspect, an embodiment of the present application provides a method for determining tire inflation pressure.

[0045] Figure 1 A schematic flow chart of a method for determining tire inflation pressure in an embodiment of the present application is shown.

[0046] Reference Figure 1 In one embodiment, the tire inflation pressure determination method comprises the following steps:

[0047] S1. Calculate the lower limit of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest allowable tire pressure.

[0048] Theoretical basis of the relationship between tire pressure and temperature: After the tire is inflated, the volume of the tire cavity can be basically regarded as unchanged, so the internal temperature and internal pressure of the tire can be approximately calculated according to the ideal gas state equation: PV = nRT, where P is the internal pressure of the tire (Pa), V is the internal volume of the tire (m 3 ), n is the amount of substance (mol), R is the ideal gas constant (J / mol*K), and T is the internal temperature of the tire (K). That is, the internal pressure of the tire is proportional to the internal temperature of the tire.

[0049] In this embodiment, before the tire is inflated, the lowest predicted tire temperature is determined according to the tire usage scenario, and the lowest permissible tire pressure is determined according to the tire model. After the tire is inflated, if the internal temperature of the tire decreases from the current tire temperature to the lowest predicted tire temperature, the internal tire pressure will decrease from the tire inflation pressure to the lowest predicted tire pressure. In order to ensure that the lowest predicted tire pressure is greater than or equal to the lowest permissible tire pressure, it is necessary to ensure that the tire inflation pressure is greater than or equal to a certain value, and this value is defined as the lower limit of the tire inflation pressure.

[0050] S2. Calculate the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure.

[0051] In this embodiment, before the tire is inflated, the maximum predicted temperature of the tire is determined according to the tire usage scenario, and the maximum allowable pressure of the tire is determined according to the tire model. After the tire is inflated, if the internal temperature of the tire increases from the current temperature of the tire to the maximum predicted temperature of the tire, the internal pressure of the tire will increase from the tire inflation pressure to the maximum predicted pressure of the tire. In order to ensure that the maximum predicted pressure of the tire is less than or equal to the maximum allowable pressure of the tire, it is necessary to ensure that the tire inflation pressure is less than or equal to a certain value, and this value is defined as the upper limit of the tire inflation pressure.

[0052] S3. If the lower limit value of the tire inflation pressure is less than or equal to the upper limit value of the tire inflation pressure, a recommended value of the tire inflation pressure is output, wherein the recommended value of the tire inflation pressure is greater than or equal to the lower limit value of the tire inflation pressure and less than or equal to the upper limit value of the tire inflation pressure.

[0053] In this embodiment, when the lower limit of the tire inflation pressure is less than or equal to the upper limit of the tire inflation pressure, there is at least a value greater than or equal to the lower limit of the tire inflation pressure and less than or equal to the upper limit of the tire inflation pressure, and the value satisfying the condition is defined as the recommended value of the tire inflation pressure. After the tire is inflated with the recommended value of the tire inflation pressure, whether the internal temperature of the tire is reduced from the current temperature of the tire to the lowest predicted temperature of the tire, or increased from the current temperature of the tire to the highest predicted temperature of the tire, it can be ensured that the predicted tire pressure is greater than or equal to the lowest allowable tire pressure and less than or equal to the highest allowable tire pressure.

[0054] Therefore, in this embodiment, the lower limit of the tire inflation pressure is calculated based on the current tire temperature, the lowest predicted tire temperature and the lowest permissible tire pressure; the upper limit of the tire inflation pressure is calculated based on the current tire temperature, the highest predicted tire temperature and the highest permissible tire pressure; if the lower limit of the tire inflation pressure is less than or equal to the upper limit of the tire inflation pressure, the recommended value of the tire inflation pressure is output, wherein the recommended value of the tire inflation pressure is greater than or equal to the lower limit of the tire inflation pressure and less than or equal to the upper limit of the tire inflation pressure. Through this embodiment, the extreme situations in the tire use scenario are fully considered to avoid the situation where the tire pressure exceeds the permissible pressure range during the use of the tire.

[0055] Furthermore, in one embodiment, after the step of calculating the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure, the step further includes:

[0056] If the lower limit value of the tire inflation pressure is greater than the upper limit value of the tire inflation pressure, a warning prompt is output.

[0057] In this embodiment, when the lower limit value of the tire inflation pressure is greater than the upper limit value of the tire inflation pressure, there is no recommended value of the tire inflation pressure that meets the conditions. That is, no matter what inflation pressure is used, it is considered that the tire pressure may exceed the allowable pressure range during the use of the tire. By outputting a warning prompt, the user can take timely measures.

[0058] Furthermore, in one embodiment, after the step of outputting the warning prompt, the following step is further included:

[0059] Based on the user operation, the lowest predicted tire temperature and / or the highest predicted tire temperature are modified.

[0060] In this embodiment, when either the lowest predicted tire temperature or the highest predicted tire temperature is improperly set, the lower limit of the tire inflation pressure may be greater than the upper limit of the tire inflation pressure, triggering an early warning prompt. After receiving the early warning prompt, the user can refine the tire usage scenario, for example, modify the annual temperature range to the seasonal temperature range, and after modifying the lowest predicted tire temperature and / or the highest predicted tire temperature, recalculate the lower limit of the tire inflation pressure and the upper limit of the tire inflation pressure, and determine whether the former is less than or equal to the latter.

[0061] After the step of outputting the warning prompt, the method further includes:

[0062] Based on the user operation, the minimum allowable tire pressure and / or the maximum allowable tire pressure are modified.

[0063] In this embodiment, when either the minimum permissible tire pressure or the maximum permissible tire pressure is improperly set, the lower limit of the tire inflation pressure may be greater than the upper limit of the tire inflation pressure, triggering an early warning prompt. After receiving the early warning prompt, the user can change the tire model, for example, use a tire model with a larger permissible pressure range, and after modifying the minimum permissible tire pressure and / or the maximum permissible tire pressure, recalculate the lower limit of the tire inflation pressure and the upper limit of the tire inflation pressure, and determine whether the former is less than or equal to the latter.

[0064] Furthermore, in one embodiment, the step of calculating the lower limit of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest allowable tire pressure includes:

[0065] The lower limit value of the tire inflation pressure is calculated according to the lower limit calculation formula. The lower limit calculation formula is:

[0066] P 0L =P rec-L *T0 / T L ;

[0067] Among them, P 0L is the lower limit of tire inflation pressure, P rec-L is the minimum permissible tire pressure, T0 is the current tire temperature, T L is the lowest predicted tire temperature, T0 and T L All are open circuit temperatures;

[0068] The step of calculating the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure comprises:

[0069] The upper limit value of the tire inflation pressure is calculated according to the upper limit calculation formula. The upper limit calculation formula is:

[0070] P 0H=P rec-H *T0 / T H ;

[0071] Among them, P 0H is the upper limit of tire inflation pressure, P rec-H is the maximum permissible tire pressure, T0 is the current tire temperature, T H is the maximum predicted tire temperature, T0 and T H All are open circuit temperatures.

[0072] Specifically, if the internal temperature of the tire decreases from the current tire temperature T0 to the minimum predicted tire temperature T L , the internal pressure of the tire will drop from the tire inflation pressure P0 to the lowest predicted tire pressure P0*T L / T0. If P0≥P 0L , then P0*T can be ensured L / T0≥P rec-L , that is, the minimum predicted tire pressure is greater than or equal to the minimum allowable tire pressure.

[0073] If the internal temperature of the tire increases from the current tire temperature T0 to the maximum predicted tire temperature T H , the internal pressure of the tire will increase from the tire inflation pressure P0 to the maximum predicted tire pressure P0*T H / T0. If P0≤P 0L , then P0*T can be ensured H / T0≤P rec-H , that is, the maximum predicted tire pressure is less than or equal to the maximum allowable tire pressure.

[0074] It should be noted that when the acquired temperature data is in degrees Celsius t, it is necessary to convert the degrees Celsius into Kelvin temperature according to T=t+273.15.

[0075] Furthermore, in one embodiment, the tire inflation pressure determination method further includes:

[0076] Obtain the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature input by the user;

[0077] Detecting whether the ratio of the minimum allowable tire pressure to the minimum predicted tire temperature is less than or equal to the ratio of the maximum allowable tire pressure to the maximum predicted tire temperature;

[0078] If so, storing the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature;

[0079] If not, the user is prompted to re-enter the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature.

[0080] In this embodiment, P 0L =P rec-L *T0 / T L , P 0H =P rec-H *T0 / T H When calculating the lower limit and upper limit of tire inflation pressure, P 0H -P 0L =T0*(P rec-L / T L -P rec-H / T H ), T0 is the open-circuit temperature, which is greater than or equal to zero, so as long as P rec-L / T L -P rec-H / T H ≥0 to ensure P 0H -P 0L ≥0, that is, when the ratio of the minimum allowable tire pressure to the lowest predicted tire temperature is less than or equal to the ratio of the maximum allowable tire pressure to the highest predicted tire temperature, the lower limit of the tire inflation pressure is less than or equal to the upper limit of the tire inflation pressure. Through this embodiment, it is possible to directly judge whether the parameter setting is reasonable during the parameter input stage, without waiting until the tire is inflated and then judging in combination with the current temperature of the tire. When the parameter setting is unreasonable, the user is reminded to reset the parameter until a reasonable parameter is obtained and stored, thereby ensuring that the recommended value of the tire inflation pressure must exist when the tire is inflated.

[0081] Furthermore, in one embodiment, before the step of calculating the lower limit of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest permissible tire pressure, the step further includes:

[0082] The lowest predicted tire temperature is calculated based on the lowest predicted ambient temperature and the maximum temperature drop of the tire;

[0083] Before the step of calculating the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure, the method further includes:

[0084] The maximum predicted temperature of the tire is calculated based on the maximum predicted ambient temperature and the maximum temperature rise of the tire.

[0085] In this embodiment, not only the ambient temperature changes in the tire usage scenario are taken into account, but also the cooling and heating of the tire relative to the environment during use, so as to accurately calculate the lowest predicted tire temperature and the highest predicted tire temperature, so as to improve the reliability of the lower limit and upper limit of the tire inflation pressure.

[0086] For example, according to general experience, the maximum temperature drop of the tire is 15% of the open temperature, that is, the lowest predicted temperature of the environment is multiplied by 85% to obtain the lowest predicted temperature of the tire, and the maximum temperature rise of the tire is 10% of the open temperature, that is, the highest predicted temperature of the environment is multiplied by 110% to obtain the highest predicted temperature of the tire.

[0087] For example, assuming that the recommended pressure of a certain model of tire is 930kPa, the allowable pressure range is 80% to 140%, the lowest predicted ambient temperature is -25°C, the highest predicted ambient temperature is 40°C, the maximum temperature drop of the tire is 15% of the open temperature, and the maximum temperature rise of the tire is 10% of the open temperature.

[0088] P 0L =P rec *80%*(t0+273.15) / ((t L +273.15)*85%);

[0089] P 0H =P rec *140%*(t0+273.15) / ((t H +273.15)*110%);

[0090] Among them, P 0L is the lower limit of tire inflation pressure, P 0H is the upper limit of tire inflation pressure, P rec is the recommended pressure, t0 is the current tire temperature, t L is the lowest predicted ambient temperature, t H is the highest predicted ambient temperature, t0, t L and t H All values ​​are in degrees Celsius.

[0091] It can be calculated that when the current temperature of the tire is -20℃, the upper limit value of the tire inflation pressure is 892.93K and the upper limit value is 956.85K; when the current temperature of the tire is -10℃, the upper limit value of the tire inflation pressure is 928.20K and the upper limit value is 994.65K; when the current temperature of the tire is 0℃, the upper limit value of the tire inflation pressure is 963.48K and the upper limit value is 1032.45K; when the current temperature of the tire is 10℃, the upper limit value of the tire inflation pressure is 998.75K and the upper limit value is 1070.24K; when the current temperature of the tire is 20℃, the upper limit value of the tire inflation pressure is 1034.02K and the upper limit value is 1108.04K; when the current temperature of the tire is 30℃, the upper limit value of the tire inflation pressure is 1069.29K and the upper limit value is 1145.84K; when the current temperature of the tire is 40℃, the upper limit value of the tire inflation pressure is 1104.57K and the upper limit value is 1183.64K.

[0092] In a second aspect, an embodiment of the present application also provides a device for determining tire inflation pressure.

[0093] Figure 2 A schematic diagram of the functional modules of a tire inflation pressure determination device in an embodiment of the present application is shown.

[0094] Reference Figure 2 In one embodiment, the tire inflation pressure determination device comprises:

[0095] A lower limit calculation module 10, used to calculate the lower limit value of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest allowable tire pressure;

[0096] An upper limit calculation module 20, used to calculate an upper limit value of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure;

[0097] The recommendation output module 30 is used to output a recommended value of the tire inflation pressure if the lower limit value of the tire inflation pressure is less than or equal to the upper limit value of the tire inflation pressure, wherein the recommended value of the tire inflation pressure is greater than or equal to the lower limit value of the tire inflation pressure and less than or equal to the upper limit value of the tire inflation pressure.

[0098] Furthermore, in one embodiment, the tire inflation pressure determination device further includes a warning output module, which is used to:

[0099] If the lower limit value of the tire inflation pressure is greater than the upper limit value of the tire inflation pressure, a warning prompt is output.

[0100] Furthermore, in one embodiment, the tire inflation pressure determination device further includes a parameter modification module, which is used to:

[0101] Based on the user operation, the lowest predicted tire temperature and / or the highest predicted tire temperature are modified.

[0102] Furthermore, in one embodiment, the tire inflation pressure determination device further includes a parameter modification module, which is used to:

[0103] Based on the user operation, the minimum allowable tire pressure and / or the maximum allowable tire pressure are modified.

[0104] Further, in one embodiment, the lower limit calculation module 10 is used to:

[0105] The lower limit value of the tire inflation pressure is calculated according to the lower limit calculation formula. The lower limit calculation formula is:

[0106] P 0L =P rec-L *T0 / T L ;

[0107] Among them, P0L is the lower limit of tire inflation pressure, P rec-L is the minimum permissible tire pressure, T0 is the current tire temperature, T L is the lowest predicted tire temperature, T0 and T L All are open circuit temperatures;

[0108] The upper limit calculation module 20 is used for:

[0109] The upper limit value of the tire inflation pressure is calculated according to the upper limit calculation formula. The upper limit calculation formula is:

[0110] P 0H =P rec-H *T0 / T H ;

[0111] Among them, P 0H is the upper limit of tire inflation pressure, P rec-H is the maximum permissible tire pressure, T0 is the current tire temperature, T H is the maximum predicted tire temperature, T0 and T H All are open circuit temperatures.

[0112] Furthermore, in one embodiment, the tire inflation pressure determination device further includes a parameter setting module, which is used to:

[0113] Obtain the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature input by the user;

[0114] Detecting whether the ratio of the minimum allowable tire pressure to the minimum predicted tire temperature is less than or equal to the ratio of the maximum allowable tire pressure to the maximum predicted tire temperature;

[0115] If so, storing the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature;

[0116] If not, the user is prompted to re-enter the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature.

[0117] Furthermore, in one embodiment, the tire inflation pressure determination device further includes a temperature conversion module, which is used to:

[0118] The lowest predicted tire temperature is calculated based on the lowest predicted ambient temperature and the maximum temperature drop of the tire;

[0119] The maximum predicted temperature of the tire is calculated based on the maximum predicted ambient temperature and the maximum temperature rise of the tire.

[0120] Among them, the functional implementation of each module in the above-mentioned tire inflation pressure determination device corresponds to the various steps in the above-mentioned tire inflation pressure determination method embodiment, and its functions and implementation processes are no longer repeated here one by one.

[0121] In a third aspect, an embodiment of the present application provides a tire inflation pressure determination device, which may be a personal computer (PC), a laptop computer, a server, or other device with data processing capabilities.

[0122] Figure 3 A schematic diagram of the hardware structure of a tire inflation pressure determination device involved in an embodiment of the present application is shown.

[0123] Reference Figure 3 In an embodiment of the present application, a tire inflation pressure determination device may include a processor, a memory, a communication interface, and a communication bus.

[0124] The communication bus may be of any type and is used to interconnect the processor, the memory, and the communication interface.

[0125] The communication interface includes an input / output (I / O) interface, a physical interface, and a logical interface, etc., which are used to interconnect the components inside the tire inflation pressure determination device, and an interface used to interconnect the tire inflation pressure determination device with other devices (such as other computing devices or user devices). The physical interface can be an Ethernet interface, an optical fiber interface, an ATM interface, etc.; the user device can be a display, a keyboard, etc.

[0126] The memory can be various types of storage media, such as random access memory (RAM), read-only memory (ROM), non-volatile RAM (NVRAM), flash memory, optical storage, hard disk, programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), etc.

[0127] The processor may be a general-purpose processor, and the general-purpose processor may call the tire inflation pressure determination program stored in the memory and execute the tire inflation pressure determination method provided in the embodiment of the present application. For example, the general-purpose processor may be a central processing unit (CPU). The method executed when the tire inflation pressure determination program is called may refer to the various embodiments of the tire inflation pressure determination method of the present application, and will not be repeated here.

[0128] Those skilled in the art will understand that Figure 3 The hardware structure shown in the figure does not constitute a limitation on the present application, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0129] In a fourth aspect, an embodiment of the present application also provides a readable storage medium.

[0130] The readable storage medium of the present application stores a tire inflation pressure determination program, wherein when the tire inflation pressure determination program is executed by a processor, the steps of the tire inflation pressure determination method as described above are implemented.

[0131] Among them, the method implemented when the tire inflation pressure determination program is executed can refer to the various embodiments of the tire inflation pressure determination method of the present application, and will not be repeated here.

[0132] It should be noted that the serial numbers of the above-mentioned embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0133] The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices. The terms "first", "second" and "third" are used to distinguish different objects, etc., and do not represent a sequence, nor do they limit "first", "second" and "third" to different types.

[0134] In the description of the embodiments of the present application, "exemplary", "for example" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary", "for example" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary", "for example" or "for example" is intended to present related concepts in a specific way.

[0135] In the description of the embodiments of the present application, unless otherwise specified, “ / ” means or, for example, A / B can mean A or B; the “and / or” in the text is merely a description of the association relationship of associated objects, indicating that three relationships may exist, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, “multiple” refers to two or more than two.

[0136] In some processes described in the embodiments of the present application, multiple operations or steps that appear in a specific order are included, but it should be understood that these operations or steps may not be executed in the order in which they appear in the embodiments of the present application or in parallel, and the sequence number of the operation is only used to distinguish the different operations, and the sequence number itself does not represent any execution order. In addition, these processes may include more or fewer operations, and these operations or steps may be executed in sequence or in parallel, and these operations or steps may be combined.

[0137] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application is essentially or the part that contributes to the prior art can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, disk, CD) as described above, and includes a number of instructions for a terminal device to execute the methods described in each embodiment of the present application.

[0138] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for determining tire inflation pressure, characterized in that: The tire inflation pressure determination method comprises: The lower limit of the tire inflation pressure is calculated based on the current tire temperature, the lowest predicted tire temperature and the lowest allowable tire pressure; The upper limit of the tire inflation pressure is calculated based on the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure; If the lower limit value of the tire inflation pressure is less than or equal to the upper limit value of the tire inflation pressure, a recommended value of the tire inflation pressure is output, wherein the recommended value of the tire inflation pressure is greater than or equal to the lower limit value of the tire inflation pressure and less than or equal to the upper limit value of the tire inflation pressure.

2. The tire inflation pressure determination method according to claim 1, characterized in that: After the step of calculating the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure, the method further includes: If the lower limit value of the tire inflation pressure is greater than the upper limit value of the tire inflation pressure, a warning prompt is output.

3. The tire inflation pressure determination method according to claim 2, characterized in that: After the step of outputting the warning prompt, the method further includes: Based on the user operation, the lowest predicted tire temperature and / or the highest predicted tire temperature are modified.

4. The tire inflation pressure determination method according to claim 2, characterized in that: After the step of outputting the warning prompt, the method further includes: Based on the user operation, the minimum allowable tire pressure and / or the maximum allowable tire pressure are modified.

5. The tire inflation pressure determination method according to claim 1, characterized in that: The step of calculating the lower limit of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest permissible tire pressure comprises: The lower limit value of the tire inflation pressure is calculated according to the lower limit calculation formula. The lower limit calculation formula is: P 0L =P rec-L *T0 / T L ; Among them, P 0L is the lower limit of tire inflation pressure, P rec-L is the minimum permissible tire pressure, T0 is the current tire temperature, T L is the lowest predicted tire temperature, T0 and T L All are open circuit temperatures; The step of calculating the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure comprises: The upper limit value of the tire inflation pressure is calculated according to the upper limit calculation formula. The upper limit calculation formula is: P 0H =P rec-H *T0 / T H ; Among them, P 0H is the upper limit of tire inflation pressure, P rec-H is the maximum permissible tire pressure, T0 is the current tire temperature, T H is the maximum predicted tire temperature, T0 and T H All are open circuit temperatures.

6. The tire inflation pressure determination method according to claim 5, characterized in that: The tire inflation pressure determination method further comprises: Obtain the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature input by the user; Detecting whether the ratio of the minimum allowable tire pressure to the minimum predicted tire temperature is less than or equal to the ratio of the maximum allowable tire pressure to the maximum predicted tire temperature; If so, storing the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature; If not, the user is prompted to re-enter the minimum allowable tire pressure, the maximum allowable tire pressure, the minimum predicted tire temperature, and the maximum predicted tire temperature.

7. The tire inflation pressure determination method according to claim 1, characterized in that: Before the step of calculating the lower limit of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest permissible tire pressure, the method further includes: The lowest predicted tire temperature is calculated based on the lowest predicted ambient temperature and the maximum temperature drop of the tire; Before the step of calculating the upper limit of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure, the method further includes: The maximum predicted temperature of the tire is calculated based on the maximum predicted ambient temperature and the maximum temperature rise of the tire.

8. A tire inflation pressure determination device, characterized in that: The tire inflation pressure determination device comprises: A lower limit calculation module, used for calculating the lower limit value of the tire inflation pressure according to the current tire temperature, the lowest predicted tire temperature and the lowest allowable tire pressure; An upper limit calculation module, used to calculate the upper limit value of the tire inflation pressure according to the current tire temperature, the maximum predicted tire temperature and the maximum allowable tire pressure; The recommendation output module is used to output a recommended value of the tire inflation pressure if the lower limit value of the tire inflation pressure is less than or equal to the upper limit value of the tire inflation pressure, wherein the recommended value of the tire inflation pressure is greater than or equal to the lower limit value of the tire inflation pressure and less than or equal to the upper limit value of the tire inflation pressure.

9. A tire inflation pressure determination device, characterized in that: The tire inflation pressure determination device includes a processor, a memory, and a tire inflation pressure determination program stored in the memory and executable by the processor, wherein when the tire inflation pressure determination program is executed by the processor, the steps of the tire inflation pressure determination method as described in any one of claims 1 to 7 are implemented.

10. A readable storage medium, characterized in that: The readable storage medium stores a tire inflation pressure determination program, wherein when the tire inflation pressure determination program is executed by a processor, the steps of the tire inflation pressure determination method according to any one of claims 1 to 7 are implemented.

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