CN110758025B

CN110758025B - Tire pressure regulating method, automobile and computer readable medium

Info

Publication number: CN110758025B
Application number: CN201810852583.9A
Authority: CN
Inventors: 柯有和; 邓陶勇; 刘祖齐
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-07-26
Filing date: 2018-07-26
Publication date: 2022-03-11
Anticipated expiration: 2038-07-26
Also published as: CN114454668A; CN110758025A

Abstract

The application discloses a tire pressure regulating method, an automobile and a computer readable medium, which can be applied to ADAS in an advanced driving assistance system, wherein the method comprises the following steps: detecting the tire pressure of a tire of an automobile to obtain a first tire pressure; determining a driving scene of the automobile; determining a second tire pressure required by the tire in the driving scene; determining a tire pressure adjustment amount corresponding to the tire according to the second tire pressure and the first tire pressure; and adjusting the tire pressure of the tire according to the tire pressure adjustment amount. In the application, the tire pressure of the tire is automatically adjusted according to the driving scene of the automobile in the driving process of the intelligent automobile, so that the tire pressure requirements of the tire of the intelligent automobile under different driving scenes can be met in time, and intelligent tire pressure monitoring is realized.

Description

Tire pressure regulating method, automobile and computer readable medium

Technical Field

The present application relates to the field of automotive electronics, and in particular, to a tire pressure adjusting method, an automobile, and a computer readable medium.

Background

According to the statistics of the national traffic department, 70 percent of the road traffic casualty accidents are caused by the problems of the tires. The tire pressure of the vehicle tire plays an important role in the safety, comfort, running energy consumption and tire wear of the vehicle. The tire pressure is too low, which may cause abnormal wear of the tire or damage to the internal mechanism of the tire, and may cause a tire burst when the tire is driven at a high speed under a low pressure. The excessive tire pressure can weaken the friction force of the tire to cause the reduction of the braking performance, and the tire and the wheel frame are easy to deform due to the impact generated by the uneven road surface, even cause the tire burst.

At present, a tire pressure monitoring device is usually installed on an automobile, so that the tire pressure of a tire can be monitored in real time, and an alarm can be given when the tire pressure of the tire is too high or too low. When a driver considers that the tire pressure of the tire needs to be adjusted, the driver needs to go to a corresponding repair shop to adjust the tire pressure of the tire by using professional equipment, and the adjustment is long in time and complicated in operation. Therefore, there is a need to develop a scheme for rapidly adjusting the tire pressure of a tire.

Disclosure of Invention

The application provides a tire pressure adjusting method, an automobile and a computer readable medium, the tire pressure of the tire is automatically adjusted according to the driving scene of the automobile in the driving process of the automobile, the tire pressure requirements of the automobile under different driving scenes can be timely met, and the operation is simple.

In a first aspect, the present application provides a tire pressure regulating method, the method comprising:

detecting the tire pressure of a tire of an automobile to obtain a first tire pressure;

determining a driving scene of the automobile;

determining a second tire pressure required by the tire in the driving scene;

determining a tire pressure adjustment amount corresponding to the tire according to the second tire pressure and the first tire pressure;

and adjusting the tire pressure of the tire according to the tire pressure adjustment amount.

The automobile may detect the tire pressure of the tire in real time using a tire pressure sensor. The driving scenario may be driving on wet road surfaces, emergency braking on snow, driving on sand, driving on highways, etc. The vehicle may be preconfigured with at least two driving scenarios. The automobile may determine a driving scene of the automobile according to a road surface type on which the automobile is driven, a driving state of the automobile, and the like. The driving scenes of automobiles are different, and the tire pressures required by the tires of the automobiles are different. For example, automobiles require lower tire pressure when driving in sand and higher tire pressure when emergency braking on wet road surfaces. For another example, tires of automobiles require different tire pressures in high-speed driving scenes and low-speed driving scenes. The automobile can adopt the method to adjust the tire pressure of each tire in real time; the required tire pressures of the individual tires of the vehicle can also be determined in accordance with the target time intervals and adjusted accordingly. The target time interval may be set by the driver or preset when the vehicle leaves the factory. For example, an ECU of an automobile determines a tire pressure required by each tire once every target time period, and performs a corresponding tire pressure regulating operation; the target time period may be 1 second, 2 seconds, 5 seconds, 10 seconds, 30 seconds, 300 seconds, or the like.

In the application, the tire pressure of the tire can be automatically adjusted according to the driving scene of the automobile in the driving process of the automobile, the tire pressure requirements of the tire of the automobile under different driving scenes can be met in time, and the operation is simple.

In an alternative implementation, the determining the second tire pressure required by the tire in the driving scenario includes:

acquiring a target parameter; the target parameters are used for determining the tire pressure required by the tire in the driving scene;

determining a tire pressure adjusting value corresponding to the target parameter;

and calculating the weighted sum of the standard tire pressure of the tire and the tire pressure adjusting value corresponding to the target parameter to obtain the second tire pressure.

The standard tire pressure can be a tire pressure standard value calibrated by the automobile. The standard value of the tire pressure of the tire of each vehicle type is different depending on the tire used by the vehicle and the load situation. The tire pressure standard value of a tire is a tire pressure value recommended by a vehicle manufacturer, and can be generally found in the following places: a vehicle user manual, a label next to the door of the cab (near the B-pillar), a drawer next to the driver's seat of the vehicle, and a fuel lid hatch.

The target parameter is a parameter related to determining the tire pressure required by the tire in the driving scene, namely a parameter influencing the tire pressure of the tire. The target parameter may include one or more parameters, one tire pressure adjustment value for each parameter.

In the implementation mode, the required tire pressure is obtained by calculating the weighted sum of the standard tire pressure of the tire and the tire pressure adjusting value corresponding to the target parameter; all parameters influencing the tire pressure required by the tire in the current driving scene can be taken into account, and the calculation is simple.

In an alternative implementation, the determining the driving scene of the automobile includes:

acquiring driving scene information, wherein the driving scene information comprises one or more of the following: road condition information of a road on which the automobile runs, friction information between the tire and the road surface and meteorological information;

and determining the driving scene according to the driving scene information.

The automobile may have elements required for determining each driving scene stored in advance. For example, if the driving scene information includes two elements, namely 5mm of water accumulation and 0.05 of road friction coefficient, it is determined that the automobile is currently driven on a wet and slippery road; and if the driving scene information contains the maintenance mark, determining that the automobile drives on the road to be maintained.

In the implementation mode, each driving scene can be accurately and quickly determined through the elements corresponding to each driving scene.

In an optional implementation manner, before the adjusting the tire pressure of the tire according to the tire pressure adjustment amount, the method further includes:

determining that the tire pressure adjustment amount is greater than or equal to an adjustment threshold.

The adjustment threshold value may be understood as a minimum tire pressure adjustment amount. That is, if the tire pressure adjustment amount is less than the adjustment threshold, the tire pressure of the tire is not adjusted; otherwise, adjusting the tire pressure of the tire according to the tire pressure adjusting amount. Since both the measured first tire pressure and the calculated second tire pressure may have a certain error, in this implementation, a certain difference between the second tire pressure and the first tire pressure is allowed, and when the difference between the second tire pressure and the first tire pressure is smaller than the adjustment threshold, the first tire pressure and the second tire pressure are considered to be equal, and no tire pressure adjustment operation needs to be performed.

In this implementation, the tire pressure regulating operation can be effectively reduced.

In an optional implementation, the method further includes:

and in the case that the tire of the automobile is determined to be flat or the abrasion amount of the tire exceeds an abrasion threshold value, outputting information prompting tire replacement.

In the implementation mode, a driver can be informed of replacing the tire in time, and traffic accidents are avoided.

In an alternative implementation, the target parameter includes at least two target sub-parameters; the determining the tire pressure adjustment value corresponding to the target parameter includes:

determining tire pressure adjusting values respectively corresponding to at least two target sub-parameters included in the target parameters to obtain at least two tire pressure adjusting values; and taking the sum of the at least two tire pressure adjusting values as the tire pressure adjusting value corresponding to the target parameter.

In the implementation mode, the tire pressure adjusting value corresponding to the target parameter is obtained by calculating the sum of the tire pressure adjusting values corresponding to the parameters contained in the target parameter; and the calculation is simple.

In an alternative implementation, the target sub-parameter is any one of a type of a road surface on which the vehicle is traveling, a traveling state of the vehicle, a state of the tire, a season in which the vehicle is located, a temperature of an environment around the vehicle, a model of the vehicle, and an acting force of the tire with the ground.

In an alternative implementation, the target sub-parameter is any one of a road surface type on which the automobile runs, a running state of the automobile, a state of the tire, a season in which the automobile is located, a temperature of an environment around the automobile, a model of the automobile, and an acting force of the tire and the ground;

the determining the tire pressure adjustment value corresponding to the target parameter includes:

determining a first tire pressure adjusting value corresponding to the road surface type; and/or the presence of a gas in the gas,

determining a second tire pressure adjusting value corresponding to the driving state; and/or the presence of a gas in the gas,

determining a third tire pressure adjustment value corresponding to the state of the tire; and/or the presence of a gas in the gas,

determining a fourth tire pressure adjusting value corresponding to the season in which the automobile is located; and/or the presence of a gas in the gas,

determining a fifth tire pressure adjusting value corresponding to the temperature of the environment around the automobile; and/or the presence of a gas in the gas,

determining a sixth tire pressure adjusting value corresponding to the automobile type of the automobile; and/or the presence of a gas in the gas,

determining a seventh tire pressure adjusting value corresponding to the acting force of the tire and the ground;

calculating the sum of two or more of the first tire pressure adjustment value, the second tire pressure adjustment value, the third tire pressure adjustment value, the fourth tire pressure adjustment value, the fifth tire pressure adjustment value, the sixth tire pressure adjustment value and the seventh tire pressure adjustment value to obtain a tire pressure adjustment value corresponding to the target parameter; or, any one of the first tire pressure adjustment value, the second tire pressure adjustment value, the third tire pressure adjustment value, the fourth tire pressure adjustment value, the fifth tire pressure adjustment value, the sixth tire pressure adjustment value, and the seventh tire pressure adjustment value is determined as the tire pressure adjustment value corresponding to the target parameter.

In an optional implementation manner, the target sub-parameter is a driving state of the automobile, and the method further includes:

detecting the running speed of the automobile;

the determining tire pressure adjustment values respectively corresponding to at least two target sub-parameters included in the target parameter includes:

and determining the tire pressure adjusting value corresponding to the target sub-parameter according to the corresponding relation between the running speed of the tire and the tire pressure adjusting value in the running scene and the running speed.

The driving state of the automobile may include a driving speed of the automobile. The tire pressure adjustment value corresponding to the target sub-parameter may be a tire pressure adjustment value corresponding to the driving speed in the driving scene.

In this implementation manner, according to the corresponding relationship between the running speed of the tire of the automobile in the current running scene and the tire pressure adjustment value, the tire pressure adjustment value corresponding to the tire at the current speed can be determined quickly and accurately.

detecting a braking condition of the automobile;

and determining a corresponding tire pressure adjusting value when the automobile is emergently braked in the driving scene.

The driving state of the vehicle may include a braking condition of the vehicle. And the tire pressure adjusting value corresponding to the emergency braking of the automobile in the driving scene is the tire pressure adjusting value corresponding to the target sub-parameter.

In the implementation mode, the tire pressure of the tire is adjusted according to the driving scene when the automobile is emergently braked, so that the automobile can be stably and timely stopped.

In an alternative implementation, the target sub-parameter is a state of the tire, and the method further comprises:

detecting a temperature of the tire and/or a wear condition of the tire;

and determining a tire pressure adjusting value corresponding to the target sub-parameter according to the temperature of the tire and/or the wear condition of the tire.

The condition of the tire may include a temperature and/or wear condition of the tire. The temperature and wear condition of the tire are parameters that determine the required tire pressure of the tire. The automobile may store a first corresponding relationship between a tire temperature and a tire pressure adjustment value, and the tire pressure adjustment value corresponding to the temperature may be determined according to the first corresponding relationship. The automobile may store a second corresponding relationship between the wear condition of the tire and the tire pressure adjustment value, and the tire pressure adjustment value corresponding to the wear condition may be determined according to the second corresponding relationship. The tire pressure adjustment value corresponding to the target sub-parameter may be a tire pressure adjustment value corresponding to the temperature; or the tire pressure adjusting value corresponding to the wear condition; the tire pressure adjustment value corresponding to the temperature and the tire pressure adjustment value corresponding to the wear condition may be added.

In the implementation mode, a tire pressure adjusting value corresponding to the state of the tire is determined according to the temperature and the wear condition of the tire; the calculated tire pressure required by the tire fully considers the influence of the state of the tire, and the current tire pressure requirement of the tire is further met.

In an optional implementation manner, the method further includes:

monitoring the temperature of said tire;

when the temperature of the tire exceeds the temperature threshold value, a prompt message indicating that the temperature of the tire is too high is output.

The temperature threshold may be 90 degrees celsius, 100 degrees celsius, 110 degrees celsius, 115 degrees celsius, 118 degrees celsius, or the like.

In the implementation mode, the temperature of the tire is monitored, and when the temperature of the tire exceeds a temperature threshold value, prompt information that the temperature of the tire is too high is output; the condition that the temperature of the tire is too high can be timely informed to a driver, and the tire burst caused by the too high temperature is avoided.

In an optional implementation manner, the method further includes:

determining a vehicle speed threshold value of the vehicle in a current driving scene;

and when the vehicle speed of the automobile exceeds the vehicle speed threshold value, outputting prompt information that the vehicle speed is too high.

In the implementation mode, the condition that the vehicle speed is too high can be timely notified to a driver, and the implementation is simple.

In a second aspect, the present application provides an automobile comprising:

the first detection unit is used for detecting the tire pressure of the automobile tire to obtain a first tire pressure;

a determination unit for determining a driving scene of the vehicle; determining a second tire pressure required by the tire in the driving scene; determining a tire pressure adjustment amount corresponding to the tire according to the second tire pressure and the first tire pressure;

and the adjusting unit is used for adjusting the tire pressure of the tire according to the tire pressure adjusting amount.

In an alternative implementation, the vehicle further comprises:

an acquisition unit configured to acquire a target parameter; the target parameters are used for determining the tire pressure required by the tire in the driving scene;

the determining unit is specifically configured to determine a tire pressure adjustment value corresponding to the target parameter; and calculating the weighted sum of the standard tire pressure of the tire and the tire pressure adjusting value corresponding to the target parameter to obtain the second tire pressure.

In an optional implementation manner, the obtaining unit is further configured to obtain driving scenario information, where the driving scenario information includes one or more of: road condition information of a road on which the automobile runs, friction information between the tire and the road surface and meteorological information;

the determining unit is specifically configured to determine the driving scene according to the driving scene information.

In an optional implementation manner, the determining unit is further configured to determine that the tire pressure adjustment amount is greater than or equal to a regulation threshold.

In an alternative implementation, the determining unit is further configured to determine that a tire of the automobile is flat or a wear amount of the tire exceeds a wear threshold; the automobile further includes:

and the output unit is used for outputting information for prompting the replacement of the tire.

In an alternative implementation, the target parameter includes at least two target sub-parameters;

the determining unit is specifically configured to determine tire pressure adjustment values respectively corresponding to at least two target sub-parameters included in the target parameter, so as to obtain at least two tire pressure adjustment values; and taking the sum of the at least two tire pressure adjusting values as the tire pressure adjusting value corresponding to the target parameter.

the determining unit is specifically configured to determine a first tire pressure adjustment value corresponding to the road surface type; and/or the presence of a gas in the gas,

the determining unit is specifically configured to determine a second tire pressure adjustment value corresponding to the driving state; and/or the presence of a gas in the gas,

the determining unit is specifically configured to determine a third tire pressure adjustment value corresponding to the state of the tire; and/or the presence of a gas in the gas,

the determining unit is specifically configured to determine a fourth tire pressure adjustment value corresponding to a season in which the automobile is located; and/or the presence of a gas in the gas,

the determining unit is specifically configured to determine a fifth tire pressure adjustment value corresponding to the temperature of the environment around the automobile; and/or the presence of a gas in the gas,

the determining unit is specifically configured to determine a sixth tire pressure adjustment value corresponding to the vehicle type of the vehicle; and/or the presence of a gas in the gas,

the determining unit is specifically used for determining a seventh tire pressure adjusting value corresponding to the acting force of the tire and the ground;

the determining unit is specifically configured to calculate a sum of two or more of the first tire pressure adjustment value, the second tire pressure adjustment value, the third tire pressure adjustment value, the fourth tire pressure adjustment value, the fifth tire pressure adjustment value, the sixth tire pressure adjustment value, and the seventh tire pressure adjustment value to obtain a tire pressure adjustment value corresponding to the target parameter; or, any one of the first tire pressure adjustment value, the second tire pressure adjustment value, the third tire pressure adjustment value, the fourth tire pressure adjustment value, the fifth tire pressure adjustment value, the sixth tire pressure adjustment value, and the seventh tire pressure adjustment value is determined as the tire pressure adjustment value corresponding to the target parameter.

In an optional implementation manner, the target sub-parameter is a driving state of the automobile, and the automobile further includes:

a second detection unit for detecting a running speed of the automobile;

the determining unit is specifically configured to determine the tire pressure adjustment value corresponding to the target sub-parameter according to the corresponding relationship between the running speed of the tire and the tire pressure adjustment value in the running scene and the running speed.

the third detection unit is used for detecting the braking condition of the automobile;

the determining unit is specifically configured to determine a tire pressure adjustment value corresponding to emergency braking of the automobile in the driving scene.

In an alternative implementation, the target sub-parameter is a state of the tire, and the vehicle further includes:

a fourth detection unit for detecting a temperature of the tire and/or a wear condition of the tire;

the determining unit is further configured to determine a tire pressure adjustment value corresponding to the target sub-parameter according to the temperature of the tire and/or the wear condition of the tire.

In an alternative implementation, the determining unit is further configured to determine that the temperature of the tire exceeds a temperature threshold;

the output unit is also used for outputting prompt information of overhigh temperature of the tire.

In the implementation mode, the temperature of the tire is detected, and when the temperature of the tire exceeds a temperature threshold value, prompt information that the temperature of the tire is too high is output; the condition that the temperature of the tire is too high can be timely informed to a driver, and the tire burst caused by the too high temperature is avoided.

In an optional implementation manner, the determining unit is further configured to determine a vehicle speed threshold of the vehicle in the current driving scene; determining the condition that the speed of the automobile exceeds the speed threshold value;

the output unit is also used for outputting prompt information that the vehicle speed is too high.

In a third aspect, the present application provides another vehicle, which includes an electronic control unit ECU, a memory, a tire pressure regulating device, a tire, and an information collecting device; the ECU is respectively and electrically connected with a memory, the tire pressure regulating device and the information acquisition device, and the tire pressure regulating device is arranged in the tire; the tire pressure regulating device is used for regulating the tire pressure of the tire under the control of the ECU; the information acquisition device is used for acquiring information required by the ECU; the memory stores a computer program, and the ECU implements the steps of the tire pressure regulating method according to the first aspect and any one of the optional implementations described above when executing the computer program.

In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, in which a computer program is stored, the computer program comprising program instructions, which, when executed by a processor, cause the processor to perform the method of the first aspect.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

FIG. 1 is a schematic diagram of a system architecture of an automobile according to the present application;

fig. 2 is a schematic flow chart of a tire pressure regulating method provided in an embodiment of the present application;

FIG. 3 is a schematic view of a tire pressure display interface of an automobile;

fig. 4 is another tire pressure regulating method provided in the embodiments of the present application;

FIG. 5 is a schematic structural view of an automobile according to the present application;

fig. 6 is a schematic structural diagram of another vehicle provided in the present application.

Detailed Description

The terminology used in the description of the embodiments section of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.

Fig. 1 is a schematic diagram of a system architecture of an automobile according to the present application, as shown in fig. 1, the system architecture includes: advanced Driving Assistance System (ADAS) 101, Electronic Control Unit (ECU) 102, and smart tire system 103; the ECU is electrically connected to the ADAS and the smart tire system, respectively.

The ADAS may include various sensors such as a monocular camera, a binocular camera, a laser radar, a millimeter wave radar, an infrared sensor, etc., and a System for implementing safe driving, such as an Automatic Emergency Braking (AEB) System, and an Anti-locked Braking System (ABS), etc. Various sensors included in the ADAS are used for acquiring road condition information, driving state information of the automobile and the like, and transmitting the acquired information to the ECU. For example, the road surface information is acquired through a binocular camera, and the speed measurement of the vehicle is realized by using a millimeter wave radar.

The intelligent tire system can comprise a tire, a tire pressure regulating device, a data wireless transmission device, a temperature sensor, a tire pressure sensor and other sensors, and can measure the tire pressure, the tire temperature, the tire wear, the acting force between the tire and the ground and the friction coefficient between the tire and the road surface in real time by using the sensors, and transmit the measured data to the ECU through the data wireless transmission device. The tire pressure regulating devices are built in the tires of the vehicle, i.e., each tire has a tire pressure regulating device built in. The tire pressure regulating device may perform a tire pressure regulating operation on the tire under the control of the ECU.

The ECU may determine a tire pressure regulation policy by integrating road condition information acquired by the ADAS, driving state information of the vehicle, and tire information acquired by the intelligent tire system, and control the tire pressure regulating device to execute the policy. The tire information acquired by the intelligent tire system may include tire pressure, tire temperature, tire wear, tire-to-ground force, and coefficient of friction between the tire and the road surface. That is, the ECU may integrate information fed back by the intelligent tire system and the ADAS, perform accurate identification of a vehicle driving scene, such as specific road conditions, specific driving states (e.g., whether braking exists), and the like, determine the tire pressure required by each tire in the driving scene, and control the tire pressure regulating device to regulate the tire pressure of each tire to the tire pressure required by each tire in the driving scene.

Based on the system architecture in fig. 1, an embodiment of the present application provides a tire pressure regulating method, which may include, as shown in fig. 2:

201. the tire pressure of the tire of the automobile is detected, and a first tire pressure is obtained.

The detecting the tire pressure of the tire of the automobile to obtain the first tire pressure may be detecting the tire pressure of the tire by using a tire pressure sensor or a tire pressure monitoring device to obtain the first tire pressure. The first tire pressure is a real-time tire pressure, namely, a tire pressure at the current moment. At present, a tire pressure monitoring device in an automobile can monitor the tire pressure of a tire in real time and display the monitored tire pressure in real time through an instrument. Fig. 3 is a schematic view of a tire pressure display interface of an automobile, as shown in fig. 3, 248KPa, 244KPa and 248KPa are real-time tire pressures of four tires of the automobile respectively. It can be seen that detecting tire pressure of a tire is a common technical means in the art and will not be described in detail here.

202. And determining the driving scene of the automobile.

The driving scene can be driving on a wet road surface, emergency braking on snow, driving on sand, driving on an expressway, driving on a second-level road, driving on a road to be maintained and the like. The above-described automobile may be previously configured with at least two driving scenarios. The automobile may determine a driving scene of the automobile according to a road surface type on which the automobile is driven, a driving state of the automobile, and the like.

Optionally, the automobile is configured with a driving scene list, and the driving scene list includes two or more driving scenes. The automobile calculates the tire pressure required by the tire in different modes under any two driving scenes in the driving scene list. That is to say, each driving scene corresponds to a mode of calculating the tire pressure required by the tire, and the tire pressure obtained by calculation can meet the tire pressure requirements of different driving scenes. For example, when an automobile calculates the tire pressure required by a tire in an emergency braking scene, the speed of the automobile does not need to be considered; the vehicle speed of the vehicle needs to be considered when calculating the tire pressure required by the tire in a high-speed driving scene.

203. And determining a second tire pressure required by the tire under the driving scene.

The second tire pressure may be understood as a tire pressure of the tire that is more appropriate in the driving scenario. The tire pressure required for different driving scenarios is different. For example, on a slope of mud, lower tire pressure may help the vehicle to obtain traction; on deeper muddy roads, the higher tire pressure may instead help the tire to cut into rather than float on the muddy surface. In practical applications, the ECU of the automobile may determine the required tire pressure in the current driving scene according to the driving state of the automobile, the state of the tire, the road surface condition and other information.

acquiring a target parameter; the target parameter is used for determining the tire pressure required by the tire in the driving scene;

The target parameters include one or more of the following: a type of a road surface on which the vehicle travels, a traveling state of the vehicle, a state of the tire, a season in which the vehicle is located, a temperature of an environment around the vehicle, a model of the vehicle, and an acting force of the tire with respect to a ground surface. The tire pressure adjustment value corresponding to the target parameter may be a sum of tire pressure adjustment values corresponding to one or more parameters included in the target parameter. The acquisition target parameters may be various parameters acquired by the automobile through a tire pressure sensor, a temperature sensor, a binocular camera, and the like. The automobile can obtain the target parameters in real time; the target parameters may also be obtained at target time intervals. The target time interval may be set by the driver or preset at the time of factory shipment. For example, the automobile may obtain the target parameters in real time, and adjust the tire pressure of each tire in real time according to the obtained target parameters. For another example, the vehicle acquires the target parameter every target time period, and determines the tire pressure required by each tire according to the acquired target parameter, where the target time period is the target time interval. That is, the automobile determines the tire pressure required for each of its tires once every target time period, and performs the corresponding tire pressure regulating operation. The above target time period may be 1 second, 2 seconds, 5 seconds, 10 seconds, 30 seconds, 300 seconds, or the like.

204. And determining the tire pressure adjustment amount corresponding to the tire according to the second tire pressure and the first tire pressure.

The determining the tire pressure adjustment amount corresponding to the tire according to the second tire pressure and the first tire pressure may be calculating a difference between the second tire pressure and the first tire pressure to obtain the tire pressure adjustment amount. If the second tire pressure is greater than the first tire pressure, the tire pressure adjustment amount is positive, and the tire pressure of the tire needs to be increased; if the second tire pressure is smaller than the first tire pressure, the tire pressure adjustment amount is negative, and the tire pressure needs to be reduced; if the second tire pressure is equal to the first tire pressure, the tire pressure adjustment amount is zero, i.e., the tire pressure of the tire is not adjusted. For example, if the first tire pressure is 2.15bar and the second tire pressure is 2.3bar, the tire pressure adjustment amount is 0.15bar, and the tire pressure of the tire needs to be adjusted to be 0.15bar higher.

205. And adjusting the tire pressure of the tire according to the tire pressure adjusting amount.

The adjusting the tire pressure of the tire according to the tire pressure adjustment amount may be adjusting the tire pressure of the tire higher than the tire pressure adjustment amount when the tire pressure adjustment amount is positive; and when the tire pressure adjusting amount is negative, adjusting the tire pressure of the tire to be lower than the tire pressure adjusting amount. In practical application, an ECU of an automobile can control a tire pressure regulating device built in a tire to regulate the tire pressure of the tire, and monitor the tire pressure of the tire in real time in the process of regulating the tire pressure until the required tire pressure is reached. The tire pressure regulating device can be arranged in the tire, and the tire pressure regulating device can comprise a tire pressure regulating valve and a cylinder; the inflating valve of the tire is respectively communicated with the inside and outside air environment of the tire through the tire pressure regulating valve. And the tire pressure regulating valve and the cylinder are used for inflating and deflating the tire under the control of the ECU, so that the adjustment of the tire pressure is realized.

The automobile can adopt the method to adjust the tire pressure of each tire in real time; the required tire pressures of the individual tires of the motor vehicle can also be determined in accordance with the target time intervals and adjusted accordingly. The automobile can determine the tire pressure required by each tire in real time according to the target parameters acquired in real time and correspondingly adjust the tire pressure of each tire; the tire pressure required by each tire can also be determined according to the acquired target parameters according to the target time interval, and the tire pressure of each tire can be adjusted correspondingly.

The adjustment threshold value may be understood as a minimum tire pressure adjustment amount. That is, if the absolute value of the tire pressure adjustment amount is smaller than the adjustment threshold, the tire pressure of the tire is not adjusted; otherwise, adjusting the tire pressure of the tire according to the tire pressure adjusting amount. Since both the measured first tire pressure and the calculated second tire pressure may have a certain error, in this implementation, a certain difference is allowed between the second tire pressure and the first tire pressure, and when the absolute value of the difference between the second tire pressure and the first tire pressure is smaller than the adjustment threshold, the first tire pressure and the second tire pressure are considered to be equal, and no tire pressure adjustment operation needs to be performed. For example, the regulation threshold value is 0.05bar, and if the tire pressure adjustment amount is 0.04bar, the tire pressure regulating operation need not be performed. For example, the regulation threshold value is 0.05bar, and if the tire pressure adjustment amount is-0.06 bar, it is necessary to perform the tire pressure regulating operation.

In an optional implementation manner, the method further includes:

and outputting information prompting to replace the tire when determining that the tire of the automobile is flat or the abrasion amount of the tire exceeds an abrasion threshold value.

The determining that the tire of the vehicle is flat may determine that a tire pressure decay rate of the tire is greater than a decay threshold. That is, when the tire pressure decay rate of the tire exceeds a certain given range (decay threshold), the tire leakage is determined. The wear amount of the tire means an accumulated wear amount of the tire. The wear amount of the tire exceeding the wear threshold may be determined by a friction coefficient between the tire and a road surface. Alternatively, in a case where the coefficient of friction between the tire and the road surface is smaller than a friction threshold, it is determined that the amount of wear of the tire exceeds the wear threshold. In practical application, the tyre tread grooves are basically ground flat due to the abrasion of the tyre running for tens of thousands of kilometers, the friction coefficient between the tyre and the road surface is very small, the safety system is rapidly reduced and needs to be replaced in time, and the safety accident is avoided. The tread depth is typically maintained at 2.8mm to 4mm to maintain maximum safety, and below 2.8mm replacement of the tire is recommended.

In the tire pressure regulating method of fig. 1, a driving scenario of the vehicle needs to be determined, and how to determine the driving scenario of the vehicle is described in detail below: the determining the driving scene of the automobile includes:

acquiring driving scene information, wherein the driving scene information comprises one or more of the following: road condition information of a road on which the automobile runs, friction information between the tire and the road surface and weather information;

and determining the driving scene according to the driving scene information.

The traffic information of the road on which the automobile runs comprises static traffic information and dynamic traffic information. The static road condition information refers to static road information, i.e., information obtained from an electronic map such as a Baidu map, a Gade map, etc., such as road grade, curvature of road, gradient of road, etc., by an onboard global positioning system, Galileo navigation system, and other positioning systems. The dynamic road condition information refers to information of actual traffic running conditions, that is, information obtained through ADAS, for example, whether a road surface has features to be maintained, whether a road surface has obstacles, whether a road surface has accumulated water or snow, and the like, and includes various information sensed by using a monocular camera, a binocular camera, a laser radar, and the like. In addition to being obtained through ADAS, dynamic road condition information broadcast by the front vehicles or infrastructure, such as information broadcast by the front vehicles about slippery road surface, may also be received. The friction information of the tire with the road surface can be obtained by an external sensor, and the friction information comprises a road surface friction coefficient. The automobile can sense the type of the road surface in real time by using the friction information of the tire and the road surface, namely, the type of the road surface on which the automobile runs, such as asphalt road surface, gravel road surface, soil road surface, wet and slippery road surface and the like can be identified. The automobile can acquire meteorological information, such as wind speed, rainfall, temperature and the like, of the area where the automobile is located in a wireless mode such as broadcasting. The vehicle may also obtain other information relevant to determining the driving scenario. Table 1 shows various information included in the travel scene information and the manner and type of acquisition of the various information.

TABLE 1

V2V in Table 1 refers to vehicle-to-vehicle, i.e. the vehicle acquires information from other vehicles; V2I refers to the car-to-infrastructure, i.e. the car gets information from the infrastructure. The automobile can fuse the road condition information of the road on which the automobile runs, the friction information between the tire and the road surface, the meteorological information and other information related to the determined running scene, which are acquired in different modes, according to a certain format to obtain the running scene information. Table 2 is a kind of fused driving scene information, and values and types of various parameters related to determining the driving scene can be quickly obtained through the table.

TABLE 2

Information	Value taking	Type (B)
			Curvature	7m	Static road conditions
Slope of slope	30 degree	Static road conditions
			Latitude and longitude	116°E，40°N	Static road conditions
Road bed	Asphalt	Static road conditions
			……	……	Static road conditions
Maintenance of road surface	Is not maintained	Dynamic road conditions
			Road surface obstacle	No roadblock	Dynamic road conditions
Accumulated water	Deepest 5mm	Dynamic road conditions
			Accumulated snow	Without snow accumulation	Dynamic road conditions
……	……	Dynamic road conditions
			Coefficient of friction of road surface	0.05	Tire information
……	……	……
			Wind speed	6-11Km/h	Other information
Rainfall amount	Maximum daily rainfall of 10mm	Other information
			……	……	Other information

Among various items of information included in the driving scene information, in a driving scene on a wet and slippery road surface, water accumulation and a road surface friction coefficient are key elements affecting vehicle safety and comfort. In this driving scenario, other parameters, such as curvature, gradient, road-base material, are relatively minor. That is, the ECU of the vehicle may identify key elements of each driving scenario according to the driving scenario information obtained by fusion, and further distinguish different driving scenarios. The automobile may be configured to store a correspondence relationship between a driving scene and a key element in advance, and the driving scene corresponding to the key element included in the driving scene information may be specified using the correspondence relationship. The determining the driving scene based on the driving scene information may be determining the driving scene based on key elements included in the driving scene information. For example, if the driving scene information includes the key element of water accumulation, it is determined that the current driving scene is a slippery road surface. For another example, if the driving scene information includes the key element of the mark to be repaired, it is determined that the current driving scene is the road surface to be repaired. The embodiment of the application provides a corresponding relation between a driving scene and key elements, as shown in table 3. The road surface friction coefficient can be used as an auxiliary element for determining each driving scene.

TABLE 3

Driving scene	Key element
		Wet road surface affected by rain/water/snow/ice	Coefficient of friction of accumulated water, snow and road surface (auxiliary)
Road surface to be maintained	Friction coefficient of road surface and sign to be maintained (auxiliary)
		High-speed \ one \ two \ three-level highway and urban road	Speed requirement, road surface friction coefficient (auxiliary)
Emergency brake	Braking force, road surface friction coefficient (auxiliary)
		……	……

The estimation of the coefficient of friction between the tyre and the road surface has been a difficult problem, being obtained by external sensors, which are however very expensive. In the embodiment of the application, the road surface friction coefficient can be used as an auxiliary factor to determine the driving scene in combination with other key elements.

On the basis of the foregoing embodiments, the present application provides a method for determining a tire pressure adjustment value corresponding to a target parameter, which specifically includes: the target parameter includes at least two target sub-parameters, and the determining the tire pressure adjustment value corresponding to the target parameter includes:

determining tire pressure adjusting values respectively corresponding to at least two target sub-parameters included in the target parameters to obtain at least two tire pressure adjusting values;

and taking the sum of the at least two tire pressure adjusting values as the tire pressure adjusting value corresponding to the target parameter.

The target sub-parameter may be any one of a type of a road surface on which the vehicle travels, a traveling state of the vehicle, a state of the tire, a season in which the vehicle is located, a temperature of an environment around the vehicle, a model of the vehicle, and an acting force of the tire with respect to the ground. In the embodiment of the present application, the target parameter may further include other parameters, which are not limited herein.

For example, the target parameter includes only one of the road surface types on which the vehicle is traveling, and the tire pressure adjustment value corresponding to the target parameter is determined, that is, the tire pressure adjustment value corresponding to the road surface type is determined. For another example, if the target parameter includes two parameters, the tire pressure adjustment values corresponding to the two parameters are respectively determined to obtain two tire pressure adjustment values; and taking the sum of the two tire pressure adjusting values as the tire pressure adjusting value corresponding to the target parameter.

Optionally, the target sub-parameter is a driving state of the vehicle, and the determining tire pressure adjustment values corresponding to at least two target sub-parameters included in the target parameter includes:

determining a tire pressure adjusting value corresponding to the running speed according to the corresponding relation between the running speed and the tire pressure adjusting value of the tire in the running scene and the running speed; alternatively, the first and second electrodes may be,

and determining a tire pressure adjusting value corresponding to the emergency braking of the automobile in the driving scene.

The driving state of the vehicle may include a driving speed of the vehicle and/or a braking condition of the vehicle. The tire pressure adjustment value corresponding to the driving state of the automobile can be a tire pressure adjustment value corresponding to the driving speed of the automobile, and can also be a tire pressure adjustment value corresponding to the emergency braking of the automobile. In practical application, if the automobile is not braked emergently, determining a tire pressure adjusting value corresponding to the running speed of the automobile; and if the automobile is emergently braked, determining the tire pressure adjusting value during the emergency braking of the automobile.

Optionally, the target sub-parameter is a state of the tire, and the determining tire pressure adjustment values corresponding to at least two target sub-parameters included in the target parameter includes:

and determining the tire pressure adjusting value corresponding to the target sub-parameter according to the temperature of the tire and/or the wear condition of the tire.

The automobile may be configured to store a correspondence relationship between the temperature of the tire and the tire pressure adjustment value in advance, and the tire pressure adjustment value corresponding to the temperature of the tire may be determined using the correspondence relationship. The automobile may be configured to store a correspondence relationship between a wear state of the tire and the tire pressure adjustment value in advance, and the tire pressure adjustment value corresponding to the wear state of the tire may be determined using the correspondence relationship.

In the implementation mode, the tire pressure adjusting value corresponding to the target parameter can be determined quickly, and the implementation is simple.

On the basis of the foregoing embodiments, the present application provides another method for determining a tire pressure adjustment value corresponding to a target parameter, which specifically includes the following steps: the target sub-parameter is any one of a road surface type on which the vehicle travels, a traveling state of the vehicle, a state of the tire, a season in which the vehicle is located, a temperature of an environment around the vehicle, a model of the vehicle, and an acting force of the tire with a ground;

determining a fourth tire pressure adjusting value corresponding to the season of the automobile; and/or the presence of a gas in the gas,

determining a fifth tire pressure adjusting value corresponding to the temperature of the surrounding environment of the automobile; and/or the presence of a gas in the gas,

calculating the sum of two or more of the first tire pressure adjustment value, the second tire pressure adjustment value, the third tire pressure adjustment value, the fourth tire pressure adjustment value, the fifth tire pressure adjustment value, the sixth tire pressure adjustment value and the seventh tire pressure adjustment value to obtain a tire pressure adjustment value corresponding to the target parameter; alternatively, any one of the first tire pressure adjustment value, the second tire pressure adjustment value, the third tire pressure adjustment value, the fourth tire pressure adjustment value, the fifth tire pressure adjustment value, the sixth tire pressure adjustment value, and the seventh tire pressure adjustment value is determined as the tire pressure adjustment value corresponding to the target parameter.

The automobile has different modes for calculating the tire pressure required by the tire under any two different driving scenes. That is, each driving scenario corresponds to a way of calculating the tire pressure required for the tire. It is understood that the target parameters may be different for different driving scenarios. For example, the target parameters corresponding to the first driving scenario include: first to fourth parameters; the target parameters corresponding to the second driving scene comprise: second to fifth parameters; wherein the first parameter and the fifth parameter are different. For another example, in the emergency braking scene of the automobile, the tire pressure adjustment value corresponding to the vehicle speed does not need to be determined; in a high-speed driving scene, a tire pressure adjusting value corresponding to the vehicle speed needs to be determined.

The automobile may be stored with a correspondence relationship between each road surface type and the tire pressure adjustment value in advance, and the tire pressure adjustment value corresponding to each road surface type may be determined using the correspondence relationship. The tire pressure adjusting values corresponding to different road surface types reflect the influence of the tire pressures corresponding to different road surfaces. For example, if the road surface type is mud or sand, the first tire pressure adjustment value is a value of-0.4 bar to-0.2 bar, that is, the tire pressure is reduced; if the road surface type is snow, the first tire pressure adjustment value is 0bar, i.e., the tire pressure remains unchanged.

The determining of the second tire pressure adjustment value corresponding to the driving state may be determining the second tire pressure adjustment value corresponding to the driving speed according to a corresponding relationship between the driving speed and the tire pressure adjustment value in the driving scene. For example, the vehicle speed is measured when the actual vehicle is running, and when the vehicle speed is higher than 80km/h, the second tire pressure adjustment value is a certain value in the range of 0.1bar to 0.2bar, namely the tire pressure is increased; when the vehicle speed is below 80km/h, the second tire pressure adjustment value is 0bar, i.e. the tire pressure remains unchanged.

The determining of the second tire pressure adjustment value corresponding to the driving state may be determining the second tire pressure adjustment value corresponding to emergency braking of the vehicle in the driving scene. For example, if the vehicle brakes suddenly on a normal dry road surface without accumulation of rain, water, snow, etc., the second tire pressure adjustment value is a certain value of-0.2 bar to-0.1 bar; if the automobile brakes suddenly on the road surface with accumulated snow or water, the second tire pressure adjusting value is a certain value of 0.1 bar-0.2 bar.

The third tire pressure adjustment value corresponding to the determination of the state of the tire may be determined based on the temperature of the tire and/or the wear condition of the tire. The tire corresponds to two different tire pressure adjustment values when the abrasion amount of the tire exceeds the new and old abrasion threshold values and does not exceed the new and old abrasion threshold values. Tires that exceed the old and new wear threshold are used tires, and tires that do not exceed the old and new wear threshold are new tires. The new tire and the old tire correspond to different tire pressure adjustment values. For example, the third tire pressure adjustment value corresponding to the new tire is 0.2bar, that is, the tire pressure is increased by 0.2 bar; the third tire pressure adjusting value corresponding to the old tire is-0.2 bar, namely the tire pressure is reduced by 0.2 bar. Alternatively, the amount of wear of the tire is determined by the coefficient of friction of the tire with the ground. Specifically, when the coefficient of friction between the tire and the ground is less than a certain value, it is determined that the amount of wear of the tire exceeds a new or old wear threshold; when the coefficient of friction between the tire and the ground is not less than the value, it is determined that the amount of wear of the tire does not exceed the new and old wear threshold values. The vehicle may determine the third tire pressure adjustment value corresponding to the temperature of the tire according to a correspondence relationship between the tire temperature and the tire pressure adjustment value. For example, when the temperature of the tire is 35 degrees celsius, the third tire pressure adjustment value is-0.1 bar, i.e., the tire pressure is reduced by 0.1 bar. Optionally, the third tire pressure adjustment value is a sum of a tire pressure adjustment value corresponding to the temperature of the tire and a tire pressure adjustment value corresponding to the wear condition of the tire. For example, the tire pressure adjustment value corresponding to the temperature of the tire is-0.1 bar, the tire pressure adjustment value corresponding to the wear condition of the tire is-0.2 bar, and the third tire pressure adjustment value is-0.3 bar.

The season in which the vehicle is located also affects the tire pressure of the tires. The automobile can determine tire pressure adjusting values corresponding to tires in different seasons according to the principle that the tires expand with heat and contract with cold. For example, when the automobile is in summer, the fourth tire pressure adjustment value is a value from-0.2 bar to-0.1 bar, that is, the tire pressure is reduced; when the automobile is in winter, the fourth tire pressure adjusting value is a certain value of 0.1-0.2 bar, namely the tire pressure is increased.

The fifth tire pressure adjustment value corresponding to the temperature of the environment around the vehicle may be determined according to a correspondence relationship between the ambient temperature and the tire pressure adjustment value. For example, when the temperature of the environment around the vehicle is 40 degrees celsius, the fifth tire pressure adjustment value is-0.2 bar; the fifth tire pressure adjustment value is 0.2bar when the temperature of the environment around the vehicle is-7 degrees celsius.

The vehicle may be pre-stored with a correspondence relationship between a vehicle type and a tire pressure adjustment value, and the sixth tire pressure adjustment value corresponding to the vehicle type of the vehicle may be determined according to the correspondence relationship. Optionally, the sixth tire pressure adjusting value ranges from-0.2 bar to 0.2 bar.

The seventh tire pressure adjustment value for determining the acting force of the tire on the ground may be the seventh tire pressure adjustment value for determining the acting force of the tire on the ground in the driving scene. The automobile can be stored with tire pressure adjusting values corresponding to the acting force of the tire and the ground in each driving scene in advance. For example, when the acting force between the tire of the automobile and the ground is the target section, the tire pressure adjustment value corresponding to the acting force between the tire and the ground in the first driving scene is 0.1bar, and the tire pressure adjustment value corresponding to the acting force between the tire and the ground in the second driving scene is 0.2 bar.

Optionally, the tire pressure adjustment value corresponding to the target parameter is calculated by using the following formula:

TP-1 + TP2+ TP3+ TP4+ TP5+ TP6+ constant;

the TP on the left side of the equation is the tire pressure required by the tire in the current driving scene; the right side of the equation is the tire pressure adjusting value corresponding to the target parameter; TP1 is a standard tire pressure value for automobile calibration; the TP2 may be a tire pressure adjustment value corresponding to a seasonal factor when the vehicle is running, that is, a fourth tire pressure adjustment value, a tire pressure adjustment value corresponding to a temperature of an environment around the vehicle, or a sum of the tire pressure adjustment value corresponding to the seasonal factor when the vehicle is running and the tire pressure adjustment value corresponding to the temperature of the environment around the vehicle; TP3 is a tire pressure adjustment value corresponding to the road surface type of the road on which the vehicle is traveling, i.e., a first tire pressure adjustment value; the TP4 may be a tire pressure adjustment value corresponding to the wear condition (new or old condition) of the tire, a tire pressure adjustment value corresponding to the temperature of the tire, or a sum of the tire pressure adjustment value corresponding to the wear condition of the tire and the tire pressure adjustment value corresponding to the temperature of the tire, that is, a third tire pressure adjustment value; TP5 is the tire pressure adjustment value corresponding to the vehicle speed of the automobile; TP6 is the tire pressure adjusting value corresponding to the emergency braking of the automobile; the constant is a tire pressure adjustment value corresponding to the model of the automobile, i.e., a sixth tire pressure adjustment value. In practical application, the automobile can calculate the tire pressure required by the tire in various driving scenes by adopting the formula; the adjustment value corresponding to at least one parameter in different driving scenes is different. For example, when emergency braking is performed on a rainwater road, the tire pressure adjustment value corresponding to the road type is 0.2bar, that is, the tire pressure is increased; and when emergency braking is carried out on the snowy ground, the tire pressure adjusting value corresponding to the road surface type is 0 bar. As another example, when the automobile runs on mud in summer with the tire temperature of 35 degrees, the old tire is used, the vehicle speed is 90km/h, the constant is 0.2bar, and the standard tire pressure value is 2.5bar, the tire pressure TP required by the tire of the automobile is 2.5-0.1-0.2-0.2-0.2+0.1+ 0.2-2 bar. Wherein 2.5bar is a standard tire pressure value; 0.2bar is a tire pressure adjusting value, namely a constant, corresponding to the vehicle type; 0.1, 0.2 are seasonal factors (summer), the temperature of the tire, the road surface type, the abrasion loss of the tire, the vehicle speed and the tire pressure adjusting value corresponding to the emergency braking condition in sequence.

Optionally, the standard tire pressure value is determined according to the loading load of the automobile. Specifically, when the automobile is in no-load/half-load, the lowest tire pressure reference value calibrated according to the air pressure standard lower limit of the automobile tire, namely the automobile, is taken as a standard tire pressure value; when the automobile is fully loaded, the maximum tire pressure value calibrated according to the standard upper limit of the air pressure of the automobile tire, namely the automobile, can be used as a standard tire pressure value.

In the embodiment of the application, the automobile does not only monitor the change of the tire pressure to realize the automatic inflation and deflation of the tire, but outputs a real-time management strategy of the tire pressure according to information such as a driving scene, the temperature of the tire, the tire pressure, the acting force of the tire and the ground, the speed and the like, and the tire pressure regulation has high precision and strong reliability.

Fig. 4 is another tire pressure regulating method provided in an embodiment of the present application, and as shown in fig. 4, the method may include:

401. and judging whether the tire of the automobile is in a safe state.

The determining whether the tire of the automobile is in a safe state may be determining whether the tire of the automobile is deflated and whether a wear amount of the tire exceeds a wear threshold. If the tire is flat or the abrasion amount of the tire exceeds an abrasion threshold value, determining that the tire is in an unsafe state; and if the tire is airtight and the abrasion amount of the tire does not exceed the abrasion threshold value, determining that the tire is in a safe state. If yes, execute 402; if not, 406 is performed. Optionally, the health of each tire in the automobile is monitored; the life of each tire is predicted from the health of each tire and displayed. Optionally, when the health degree of the tire is lower than a certain degree, outputting corresponding prompt information. The health of the tire is positively correlated with the amount of wear of the tire.

402. And detecting the tire pressure of the tire to obtain a first tire pressure.

403. And determining a second tire pressure required by the automobile in the current driving scene.

The specific implementation is the same as the method in fig. 1, and is not described in detail here.

404. And judging whether the difference value of the first tire pressure and the second tire pressure is smaller than an adjusting threshold value.

If not, go to 405; if so, 401 is performed. The determining whether the difference between the first tire pressure and the second tire pressure is smaller than the regulation threshold may be determining whether an absolute value of the difference between the first tire pressure and the second tire pressure is smaller than the regulation threshold.

405. And regulating the tire pressure of the tire.

The adjusting of the tire pressure of the tire may be adjusting the tire pressure of the tire to the second tire pressure. The ECU of the automobile can control the tire pressure regulating device arranged in the tire to regulate the tire pressure of the tire, and monitor the tire pressure of the tire in real time in the process of regulating the tire pressure until the required tire pressure is reached. The tire pressure regulating device can be arranged in the tire, and the tire pressure regulating device can comprise a tire pressure regulating valve and a cylinder; the inflating valve of the tire is respectively communicated with the inside and outside air environment of the tire through the tire pressure regulating valve. And the tire pressure regulating valve and the cylinder are used for inflating and deflating the tire under the control of the ECU, so that the adjustment of the tire pressure is realized.

406. And outputting alarm information.

The alarm information is used for prompting a driver that the tire is too flat or worn and needs to be replaced in time.

In an optional implementation manner, the method further includes:

monitoring the temperature of said tire;

In an optional implementation manner, the method further includes:

The vehicle speed threshold for determining the current driving scene of the vehicle may be a maximum vehicle speed limited by a road on which the vehicle is determined to be the vehicle speed threshold; the vehicle speed threshold may be determined according to a shortest braking distance required by the vehicle in the current driving scene, where a braking distance of the vehicle in emergency braking when the vehicle speed reaches the vehicle speed threshold in the current driving scene is less than the shortest braking distance. Optionally, the vehicle determines the vehicle speed corresponding to the shortest braking distance as the vehicle speed threshold according to the corresponding relationship between the braking distance and the vehicle speed in the current driving scene. For example, the shortest braking distance when driving on a slippery road is 40 meters, and in a driving scene on a slippery road, the vehicle speed is 50 kilometers per hour, which corresponds to 40 meters of braking distance, and the vehicle speed threshold is 50 kilometers per hour.

In the embodiment of the application, under the condition that the tire is determined to be in the safe state, the tire pressure of the tire is automatically adjusted according to the driving scene of the automobile, the tire pressure requirements of the tire of the automobile under different driving scenes can be met in time, and the operation is simple.

Fig. 5 is a schematic structural diagram of an automobile provided by the present application, and as shown in fig. 5, the automobile may include:

a first detecting unit 501, configured to detect a tire pressure of a tire of an automobile to obtain a first tire pressure;

a determination unit 502 for determining a driving scenario of the automobile; determining a second tire pressure required by the tire in the driving scene; determining a tire pressure adjustment amount corresponding to the tire according to the second tire pressure and the first tire pressure;

a regulating unit 503, configured to regulate the tire pressure of the tire according to the tire pressure adjustment amount.

The first detection unit 501 may be a tire pressure sensor. The determination unit 502 may be an ECU of the automobile. The regulating unit 503 may be a tire pressure regulating device. The tire pressure regulating device can be arranged in the tire, and the tire pressure regulating device can comprise a tire pressure regulating valve and a cylinder; the inflating valve of the tire is respectively communicated with the inside and outside air environment of the tire through the tire pressure regulating valve. And the tire pressure regulating valve and the cylinder are used for inflating and deflating the tire under the control of the ECU, so that the adjustment of the tire pressure is realized. The determination unit 502 may acquire the above-described first tire pressure detected by the first detection unit 501 (tire pressure sensor); the regulating unit 503 (tire pressure regulating device) may also be controlled to achieve regulation of the tire pressure.

In an optional implementation manner, the automobile further includes:

an obtaining unit 504, configured to obtain a target parameter; the target parameter is used for determining the tire pressure required by the tire in the driving scene;

the determining unit 502 is specifically configured to determine a tire pressure adjustment value corresponding to the target parameter; and calculating the weighted sum of the standard tire pressure of the tire and the tire pressure adjusting value corresponding to the target parameter to obtain the second tire pressure.

In practical applications, the acquiring unit 504 may include a monocular camera, a binocular camera, a trinocular camera, a laser radar, an infrared sensor, a temperature sensor, and the like.

In an optional implementation manner, the obtaining unit 504 is further configured to obtain driving scenario information, where the driving scenario information includes one or more of the following: road condition information of a road on which the automobile runs, friction information between the tire and the road surface and weather information;

the determining unit 502 is specifically configured to determine the driving scene according to the driving scene information.

The determination unit 502(ECU) may determine the driving scene of the automobile based on the driving scene information acquired by the acquisition unit 504.

In an optional implementation manner, the determining unit 502 is further configured to determine that the tire air pressure adjustment amount is greater than or equal to the adjustment threshold.

In an alternative implementation, the determining unit 502 is further configured to determine that a tire of the automobile is flat or a wear amount of the tire exceeds a wear threshold; the above-mentioned car still includes:

and an output unit 505 for outputting information for prompting replacement of the tire.

The output unit 505 may be a display device on the vehicle for displaying information prompting the replacement of the tire.

the determining unit 502 is specifically configured to determine tire pressure adjustment values corresponding to at least two target sub-parameters included in the target parameter, respectively, to obtain at least two tire pressure adjustment values; and taking the sum of the at least two tire pressure adjusting values as the tire pressure adjusting value corresponding to the target parameter.

In an alternative implementation, the target sub-parameter is any one of a type of a road surface on which the vehicle travels, a traveling state of the vehicle, a state of the tire, a season in which the vehicle is located, a temperature of an environment around the vehicle, a model of the vehicle, and an acting force of the tire with the ground.

In an alternative implementation, the target sub-parameter is any one of a road surface type on which the vehicle travels, a traveling state of the vehicle, a state of the tire, a season in which the vehicle is located, a temperature of an environment around the vehicle, a model of the vehicle, and an acting force of the tire with the ground;

the determining unit 502 is specifically configured to determine a first tire pressure adjustment value corresponding to the road surface type; and/or the presence of a gas in the gas,

the determining unit 502 is specifically configured to determine a second tire pressure adjustment value corresponding to the driving state; and/or the presence of a gas in the gas,

the determining unit 502 is specifically configured to determine a third tire pressure adjustment value corresponding to the state of the tire; and/or the presence of a gas in the gas,

the determining unit 502 is specifically configured to determine a fourth tire pressure adjustment value corresponding to a season in which the vehicle is located; and/or the presence of a gas in the gas,

the determining unit 502 is specifically configured to determine a fifth tire pressure adjustment value corresponding to the temperature of the environment around the automobile; and/or the presence of a gas in the gas,

the determining unit 502 is specifically configured to determine a sixth tire pressure adjustment value corresponding to the vehicle type of the automobile; and/or the presence of a gas in the gas,

the determining unit 502 is specifically configured to determine a seventh tire pressure adjustment value corresponding to an acting force of the tire on the ground;

the determining unit 502 is specifically configured to calculate a sum of two or more of the first tire pressure adjustment value, the second tire pressure adjustment value, the third tire pressure adjustment value, the fourth tire pressure adjustment value, the fifth tire pressure adjustment value, the sixth tire pressure adjustment value, and the seventh tire pressure adjustment value to obtain a tire pressure adjustment value corresponding to the target parameter; alternatively, any one of the first tire pressure adjustment value, the second tire pressure adjustment value, the third tire pressure adjustment value, the fourth tire pressure adjustment value, the fifth tire pressure adjustment value, the sixth tire pressure adjustment value, and the seventh tire pressure adjustment value is determined as the tire pressure adjustment value corresponding to the target parameter.

In an optional implementation manner, the target sub-parameter is a driving state of the vehicle, and the vehicle further includes:

a second detecting unit 506 for detecting the traveling speed of the automobile;

the determining unit 502 is specifically configured to determine the tire pressure adjustment value corresponding to the target sub-parameter according to the corresponding relationship between the running speed of the tire and the tire pressure adjustment value in the running scene and the running speed.

The second detection unit 506 may be a speed radar, such as a millimeter wave radar, mounted on the vehicle.

a third detecting unit 507 for detecting a braking condition of the vehicle;

the determining unit 502 is specifically configured to determine a tire pressure adjustment value corresponding to emergency braking of the automobile in the driving scene.

a fourth detecting unit 508 for detecting the temperature of the tire and/or the wear condition of the tire;

the determining unit 502 is further configured to determine the tire pressure adjustment value corresponding to the target sub-parameter according to the temperature of the tire and/or the wear condition of the tire.

The fourth detection unit 504 may include a temperature sensor and a sensor that detects a friction coefficient of a tire with the ground.

Fig. 6 is a schematic structural diagram of another vehicle provided in the present application, and as shown in fig. 6, the vehicle may include an ECU601, a memory 602, a tire pressure regulating device 603, a tire 604, and an information collecting device 605; the ECU601 is respectively connected with the memory 602, the tire pressure regulating device 603 and the information collecting device 605 through the bus 606, and the tire pressure regulating device 603 is arranged in the tire 604; a tire pressure regulating device 603 for regulating the tire pressure of the tire 604 under the control of the ECU 601; the information acquisition device 605 is used for acquiring information required by the ECU 601; the memory 602 stores a computer program, and the ECU601 realizes, when executing the computer program: detecting the tire pressure of a tire of an automobile to obtain a first tire pressure; determining a driving scene of the automobile; determining a second tire pressure required by the tire in the driving scene; determining a tire pressure adjustment amount corresponding to the tire according to the second tire pressure and the first tire pressure; and adjusting the tire pressure of the tire according to the tire pressure adjusting amount.

In an embodiment of the present application, a computer-readable storage medium is provided, the computer-readable storage medium storing a computer program, the computer program comprising program instructions, which when executed by a processor, implement: detecting the tire pressure of a tire of an automobile to obtain a first tire pressure; determining a driving scene of the automobile; determining a second tire pressure required by the tire in the driving scene; determining a tire pressure adjustment amount corresponding to the tire according to the second tire pressure and the first tire pressure; and adjusting the tire pressure of the tire according to the tire pressure adjusting amount.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A tire pressure regulating method, characterized by comprising:

determining a driving scene of the automobile;

determining a second tire pressure required by the tire in the driving scene;

adjusting the tire pressure of the tire according to the tire pressure adjustment amount;

the determining a second tire pressure required by the tire in the driving scenario includes:

acquiring target parameters, wherein the target parameters are used for determining the tire pressure required by the tire in the driving scene;

calculating the weighted sum of the standard tire pressure of the tire and the tire pressure adjusting value corresponding to the target parameter to obtain the second tire pressure;

before the adjusting the tire pressure of the tire according to the tire pressure adjustment amount, the method further includes:

2. The method of claim 1, wherein the determining the driving scenario of the automobile comprises:

and determining the driving scene according to the driving scene information.

3. The method of claim 2, further comprising:

4. The method according to any one of claims 1 to 3, wherein the target parameter includes at least two target sub-parameters, and the determining the tire pressure adjustment value corresponding to the target parameter includes:

5. The method according to claim 4, wherein the target sub-parameter is any one of a road surface type on which the vehicle travels, a traveling state of the vehicle, a state of the tire, a season in which the vehicle is located, a temperature of an environment around the vehicle, a model of the vehicle, and an acting force of the tire with the ground.

6. The method of claim 5, wherein the target sub-parameter is a driving state of the automobile, the method further comprising:

detecting the running speed of the automobile;

7. The method of claim 6, wherein the target sub-parameter is a driving state of the automobile, the method further comprising:

detecting a braking condition of the automobile;

8. The method of claim 5, wherein the target sub-parameter is a state of the tire, the method further comprising:

detecting a temperature of the tire and/or a wear condition of the tire;

9. An automobile, comprising:

the adjusting unit is used for adjusting the tire pressure of the tire according to the tire pressure adjusting amount; the automobile further includes:

the determining unit is specifically configured to determine a tire pressure adjustment value corresponding to the target parameter; calculating the weighted sum of the standard tire pressure of the tire and the tire pressure adjusting value corresponding to the target parameter to obtain the second tire pressure;

the determination unit is further configured to determine that the tire pressure adjustment amount is greater than or equal to an adjustment threshold.

10. The vehicle of claim 9,

the acquiring unit is further configured to acquire driving scenario information, where the driving scenario information includes one or more of: road condition information of a road on which the automobile runs, friction information between the tire and the road surface and meteorological information;

11. The vehicle of claim 10,

the determining unit is further used for determining the condition that the tire of the automobile is flat or the abrasion amount of the tire exceeds an abrasion threshold value; the automobile further includes:

12. The automobile of any of claims 9-11, wherein the target parameters include at least two target sub-parameters;

13. The automobile of claim 12, wherein the target sub-parameter is any one of a road surface type on which the automobile is running, a running state of the automobile, a state of the tire, a season in which the automobile is located, a temperature of an environment around the automobile, a model of the automobile, and an acting force of the tire with the ground.

14. The vehicle of claim 13, wherein the target sub-parameter is a driving state of the vehicle, the vehicle further comprising:

a second detection unit for detecting a running speed of the automobile;

15. The vehicle of claim 14, wherein the target sub-parameter is a driving state of the vehicle, the vehicle further comprising:

16. The vehicle of claim 13, wherein the target sub-parameter is a state of the tire, the vehicle further comprising:

17. An automobile, comprising: the tire pressure regulating device comprises an electronic control unit ECU, a memory, a tire pressure regulating device, a tire and an information acquisition device; the ECU is respectively and electrically connected with a memory, the tire pressure regulating device and the information acquisition device, and the tire pressure regulating device is arranged in the tire; the tire pressure regulating device is used for regulating the tire pressure of the tire under the control of the ECU; the information acquisition device is used for acquiring information required by the ECU; the memory stores a computer program which, when executed by the ECU, implements the steps of the tire pressure regulating method according to any one of claims 1 to 8.

18. A computer-readable medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the tire pressure regulating method according to any one of claims 1 to 8.