Vehicle wet ground braking control method, storage medium, vehicle controller, and vehicle

Abstract

The application discloses a vehicle wet ground braking control method, a storage medium, a vehicle controller and a vehicle, and the vehicle wet ground braking control method comprises the following steps: detecting the wetness information of a current road surface and determining the slip rate information of the vehicle; when it is determined according to the wetness information of the current road surface that the current road surface has water accumulation and it is determined according to the slip rate information of the vehicle that the current slip rate of the vehicle reaches a preset threshold value, the powder accumulator arranged for the corresponding wheel is controlled to work. Therefore, the vehicle wet ground braking control method of the embodiment can timely improve the friction between the wheel and the ground, improve the wet ground braking and improve the driving stability, and has a wide application scene, and can guarantee the safety of the user and improve the user experience.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle control, in particular to a vehicle wet ground braking control method, a computer readable storage medium, a vehicle controller and a vehicle. BACKGROUND

[0002] The friction between the wheels of the vehicle and the ground is a very important factor to ensure that the vehicle can normally drive, especially on the road surface after rain and snow, because the ground is wet and slippery, the friction coefficient between the wheels and the ground is reduced, so the friction between the wheels and the ground is small, and the wheels are prone to slip during vehicle braking, which may cause accidents and affect the driving safety of the user.

[0003] In related technologies, a rain sensor signal is usually used as an input signal to identify rain and snow weather outdoors, and then the brake of the vehicle is periodically pressurized for a short time to clean the brake disc and remove rainwater or snowwater on the brake disc to ensure the friction coefficient between the brake disc and the brake pad and improve the braking response characteristics.

[0004] However, this method cannot be started in the working condition of no rain and water accumulation on the ground or in the garage, the scene coverage is less, and ensuring the friction between the brake disc and the brake pad cannot solve the problem of small friction coefficient between the wheels and the ground, and the vehicle braking still has a high risk. SUMMARY

[0005] The present application aims to at least solve one of the technical problems in the related art. To this end, one object of the present application is to provide a vehicle wet ground braking control method that can timely improve the friction between the wheels and the ground, improve wet ground braking and improve driving stability, has a wide application scene, and can ensure the safety of the user and improve the user experience.

[0006] A second object of the present application is to provide a computer readable storage medium.

[0007] A third object of the present application is to provide a vehicle controller.

[0008] A fourth object of the present application is to provide a vehicle.

[0009] To achieve the above objects, the first aspect of the present application provides a vehicle wet ground braking control method, the control method comprising: detecting the humidity information of the current road surface and determining the slip rate information of the vehicle; when it is determined according to the humidity information of the current road surface that there is water accumulation on the current road surface, and it is determined according to the slip rate information of the vehicle that the current slip rate of the vehicle reaches a preset threshold, controlling the powder accumulator arranged corresponding to the wheels to work.

[0010] The vehicle wet ground braking control method of the embodiment detects the current road surface humidity information and the vehicle slip rate information, and controls the powder blower of the powder accumulator arranged corresponding to the wheel to blow out powder to improve the friction between the wheel and the ground when the road surface has water and the vehicle slip rate reaches the preset threshold. Thus, the vehicle wet ground braking control method of the embodiment can improve the friction between the wheel and the ground in time, improve the wet ground braking and improve the driving stability, and has wide application scenarios, and can ensure the safety of the user and improve the user experience.

[0011] In some embodiments of the application, the humidity sensor arranged corresponding to the wheel detects the humidity information of the current road surface.

[0012] In some embodiments of the application, determining that the current road surface has water according to the humidity information of the current road surface comprises: determining that the current road surface has water when the humidity sensor of any one side wheel continuously detects the humidity signal according to the humidity information of the current road surface; or determining that the current road surface has water when the humidity sensors of two side wheels continuously detect the humidity signal according to the humidity information of the current road surface.

[0013] In some embodiments of the application, the humidity sensor is arranged at the bottom of the longitudinal drainage main groove close to the middle of the tire tread.

[0014] In some embodiments of the application, the first humidity sensor and the second humidity sensor are arranged in each tire, and the first humidity sensor and the second humidity sensor are symmetrically distributed in 180° in the circumference of the longitudinal drainage main groove.

[0015] In some embodiments of the application, the slip rate information of the vehicle is determined by: acquiring the vehicle speed and the wheel angular speed of the vehicle, and determining the slip rate information of the vehicle according to the vehicle speed and the wheel angular speed of the vehicle.

[0016] In some embodiments of the application, the vehicle comprises a gas supply assembly connected with the powder accumulator, and the outlet of the powder accumulator is arranged corresponding to the tire, wherein the working of the powder accumulator arranged corresponding to the wheel is controlled by: controlling the gas supply assembly to pressurize the powder accumulator, so that the powder accumulator blows out the high-pressure gas flow carrying the magnesium carbonate powder.

[0017] To achieve the above purpose, the second aspect embodiment of the application provides a computer readable storage medium, which stores a vehicle wet ground braking control program, and the vehicle wet ground braking control program is executed by a processor to realize the vehicle wet ground braking control method according to the above embodiment.

[0018] The computer readable storage medium of the embodiment of the present application can improve the friction between the wheels and the ground in time, improve wet ground braking and improve driving stability through the vehicle wet ground braking control program, has a wide application scene, can guarantee the safety of the user and improve the user experience.

[0019] To achieve the above object, the third aspect of the present application provides a vehicle controller, comprising a memory, a processor and a vehicle wet ground braking control program stored in the memory and executable on the processor, when the processor executes the vehicle wet ground braking control program, the vehicle wet ground braking control method according to the above embodiment is realized.

[0020] The vehicle controller of the embodiment of the present application comprises a memory and a processor, and the processor executes the vehicle wet ground braking control program stored in the memory, can improve the friction between the wheels and the ground in time, improve wet ground braking and improve driving stability, has a wide application scene, can guarantee the safety of the user and improve the user experience.

[0021] To achieve the above object, the fourth aspect of the present application provides a vehicle comprising the vehicle controller described above.

[0022] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 is a flow chart of the vehicle wet ground braking control method according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the humidity setting position of the humidity sensor according to an embodiment of the present application;

[0025] Figure 3 is a schematic diagram of the system corresponding to the vehicle wet ground braking control method according to an embodiment of the present application;

[0026] Figure 4 is a structural block diagram of the vehicle controller according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0028] A vehicle wet ground braking control method, a storage medium, a vehicle controller and a vehicle of an embodiment of the present application are described below with reference to the accompanying drawings.

[0029] Figure 1 is a flow chart of a vehicle wet ground braking control method according to an embodiment of the present application.

[0030] As shown in Figure 1 , the present application proposes a vehicle wet ground braking control method, which comprises the following steps:

[0031] S10, detecting the wetness information of the current road surface and determining the slip rate information of the vehicle.

[0032] Specifically, in this embodiment, the wetness information of the current road surface can be detected by the wetness sensor arranged in the wheel, so whether it is currently raining or it has stopped raining, if the road surface has accumulated water, the wetness sensor can detect the wetness information of the current road surface. More specifically, in this embodiment, the wetness sensor is arranged in the wheel, and when the wheel passes through the accumulated water road surface, the wetness sensor can detect that the road surface passed by the current wheel has accumulated water.

[0033] In some embodiments, the wetness sensor is arranged at the bottom of the longitudinal drainage main groove near the middle of the tire tread.

[0034] Specifically, as shown in Figure 2 , the tire 10 has three or four longitudinal drainage main grooves 12 distributed on the tread, and the depth of the drainage main groove 12 is usually about 7-8 mm, which can be used for drainage and can also be used to improve the friction between the tire tread and the ground. In this embodiment, the wetness sensor 11 is arranged at the bottom of the longitudinal drainage main groove near the middle of the tire tread, so as to ensure the water contact efficiency of the wetness sensor. More specifically, in order to ensure that the wetness sensor 11 can work normally, the patch vulcanization of the wetness sensor 11 contacting water in this embodiment can be embedded on the bottom of the tire drainage main groove, and the control chip and power supply part of the wetness sensor 11 and other waterproof components are arranged in the cavity of the tire 10.

[0035] In this embodiment, if the tire is provided with three drainage main grooves, the wetness sensor 11 can be arranged on the second longitudinal drainage main groove, i.e., the middle drainage main groove; if the tire is provided with four drainage grooves, the wetness sensor 11 can be arranged on any one of the second or third longitudinal drainage main grooves, such as Figure 2 as shown in the schematic diagram of the tire provided with four drainage grooves.

[0036] In this embodiment, each tire is provided with a first wetness sensor and a second wetness sensor, and the first wetness sensor and the second wetness sensor are distributed in a 180° symmetry in the circumference of the longitudinal drainage main groove.

[0037] Specifically, in this embodiment, Figure 2 As shown, each tire 10 is equipped with two humidity sensors, namely a first humidity sensor 11 and a second humidity sensor 13. These two humidity sensors are arranged symmetrically 180° around the circumference of the same longitudinal drainage groove, which improves detection accuracy while minimizing the impact of the humidity sensor's own weight on tire uniformity. Furthermore, the humidity sensors are located at the bottom of the tire's longitudinal drainage groove. Theoretically, the humidity sensors are not easily damaged during the wear process of the tire 10 throughout its life cycle. After the tire 10 reaches the end of its life cycle, the humidity sensor's control chip and power supply can be easily recycled and reused, significantly reducing design costs. Of course, the number of humidity sensors provided in this embodiment is not limited; for example, four or six humidity sensors can be provided. The specific selection can be made based on design costs and user experience.

[0038] This embodiment also detects and determines the vehicle's slip ratio. The slip ratio can be used to determine tire slippage and, in turn, to determine whether a wheel is susceptible to slippage. In this embodiment, determining the vehicle's slip ratio information includes obtaining the vehicle's speed and wheel angular velocity, and determining the vehicle's slip ratio information based on the vehicle's speed and wheel angular velocity.

[0039] Specifically, the vehicle's speed and wheel angular velocity can be acquired through speed sensors and angular velocity sensors. The vehicle's slip ratio can be calculated using the speed and wheel angular velocity. More specifically, the slip ratio is calculated as the percentage obtained by subtracting the wheel speed from the vehicle speed, divided by the vehicle speed. Wheel speed is the wheel angular velocity multiplied by the wheel radius. When the wheel is locked and sliding, the slip ratio is 100%; when the wheel is rolling, the slip ratio is 0; and when the wheel is rolling and slipping, the slip ratio ranges from 0 to 100%. A higher slip ratio indicates a greater proportion of the wheel's motion is caused by slip.

[0040] S20 , when it is determined based on the current road surface humidity information that there is water on the current road surface, and based on the vehicle slip rate information, it is determined that the current slip rate of the vehicle reaches a preset threshold, controlling the powder accumulator provided on the corresponding wheel to operate.

[0041] When the humidity information of the current road surface determines that there is water on the current road surface, and the slip rate information reaches the preset threshold, it means that the wheels of the current vehicle are prone to slip due to the high humidity of the ground. Therefore, the powder accumulator set on the corresponding wheel can be controlled to work to increase the friction between the tire and the road surface to prevent the vehicle from slipping and causing a traffic accident.

[0042] In the embodiment, determining that the current road surface has water accumulation according to the humidity information of the current road surface includes: determining that the current road surface has water accumulation according to the humidity information of the current road surface when the humidity sensor of any one side wheel continuously detects a humidity signal; or determining that the current road surface has water accumulation according to the humidity information of the current road surface when the humidity sensors of two side wheels continuously detect humidity signals.

[0043] Specifically, in the embodiment, the humidity sensor continuously returns the collected information, and then the water accumulation of the road surface can be determined. If the humidity signal of the wheel on one side of the vehicle, i.e., the front and rear wheels on the left side or the front and rear wheels on the right side, is continuously detected, it can be determined that at least one side of the current road surface has water accumulation. It should be noted that the continuous detection of the humidity signal in the embodiment refers to the continuous detection of the humidity signal by the same humidity sensor for more than twice. That is, if a humidity sensor in one of the wheels on one side of the vehicle continuously detects a humidity signal for more than twice, it can be determined that the side of the current vehicle has water accumulation, and then it can be further determined that the current road surface has water accumulation. Of course, in some embodiments, it can also be determined that the current road surface has water accumulation only when all humidity sensors arranged on the two wheels on one side continuously detect a humidity signal for more than twice.

[0044] When the humidity sensors of the wheels on both sides of the vehicle continuously detect humidity signals, it is also determined that the current road surface has water accumulation. The specific determination method can refer to the determination method of the water accumulation of the wheel on one side described above, and will not be described here.

[0045] It should be noted that if the humidity signals of the tires on both sides of the vehicle are continuously returned, but the signal return time of the left and right tires is different, and the signal interval time of the front and rear tires is also not constant, it indicates that the road surface passed by the vehicle is a continuous water accumulation road surface. If the humidity signal is not continuously returned, and only the front axle or rear axle tire returns a signal or continuously returns a signal for twice, it indicates that the road surface basically does not have water accumulation, and only accidentally passes through a water hole. If the road surface does not have water accumulation or the road surface is a continuous water accumulation road surface, the operation of the powder accumulator arranged corresponding to the wheel can not be controlled.

[0046] In some embodiments of the present application, as shown in Figure 3 The vehicle includes a gas supply assembly 22, the gas supply assembly 22 is connected with the powder accumulator 25, and the outlet 26 of the powder accumulator 25 is arranged corresponding to the tire 10. The operation of the powder accumulator arranged corresponding to the wheel includes: controlling the gas supply assembly 22 to pressurize the powder accumulator 25, so that the powder accumulator 25 blows out a high-pressure gas flow carrying magnesium carbonate powder.

[0047] Specifically, referring to Figure 3The vehicle can be provided with the air supply assembly 22, and further provided with the powder accumulator 25 connected with the air supply assembly 22, and it can be understood that the air supply assembly 22 is connected with the powder accumulator 25 through the air circuit, and the powder accumulator 25 can set the outlet near the tire 10 through the air circuit, such as setting the air outlet 26 against the tire 10 through the air circuit 24. It should be noted that the air supply assembly 22 is further connected with the controller 21 through the circuit 23, the controller 21 is wirelessly connected with all the humidity sensors, and can receive the humidity information detected by the humidity sensors. And the controller 21 can control the air supply assembly to pressurize the powder accumulator 25, so that the powder accumulator 25 can blow the powder out of the outlet 26. Figure 3 Each wheel is provided with an outlet, not all shown.

[0048] It can be understood that the powder accumulator 25 is further provided with a valve switch, and the controller 21 can control the powder in the powder accumulator 25 to blow near different wheels by controlling the valve switch in the powder accumulator 25. More specifically, the air outlet 26 can be arranged at the front end of the wheel, and the powder in the powder accumulator 25 can be blown to the wet ground in front of the wheel to absorb the residual water film on the ground. It should be noted that in the embodiment, the powder can be provided only to the wheel corresponding to the humidity sensor that collects the humidity signal, and of course, the powder can also be blown out in front of all the wheels (such as four wheels) every time the powder accumulator 25 works. Alternatively, the powder can be magnesium carbonate powder or other powder with strong water absorption capacity, so as to improve the friction between the tire tread and the wet ground and ensure the driving safety of the driver.

[0049] In summary, the vehicle wet ground braking control method of the embodiment of the present application can timely improve the friction between the wheel and the ground, improve the wet ground braking and improve the driving stability, and has a wide application scene, and can ensure the safety of the user and improve the user experience.

[0050] Further, the present application provides a computer readable storage medium having a vehicle wet ground braking control program stored thereon, and the vehicle wet ground braking control program is executed by a processor to realize the vehicle wet ground braking control method according to the above-mentioned embodiment.

[0051] The computer readable storage medium of the embodiment of the present application can timely improve the friction between the wheel and the ground, improve the wet ground braking and improve the driving stability through the vehicle wet ground braking control program, and has a wide application scene, and can ensure the safety of the user and improve the user experience.

[0052] Figure 4 is a structure block diagram of the vehicle controller according to the embodiment of the present application.

[0053] Further, the present application provides a vehicle controller 100, comprising a memory 101, a processor 102, and a vehicle wet ground braking control program stored in the memory 101 and executable on the processor 102, wherein the processor 102 implements the vehicle wet ground braking control method according to the above-mentioned embodiments when executing the vehicle wet ground braking control program.

[0054] The vehicle controller of the embodiments of the present application comprises a memory and a processor, and the processor executes the vehicle wet ground braking control program stored in the memory, so that the friction between the wheel and the ground can be improved in time, the wet ground braking can be improved, the driving stability can be improved, the application scenarios are wide, the safety of the user can be ensured, and the user experience can be improved.

[0055] Some embodiments of the present application also provide a vehicle comprising the vehicle controller in the above-mentioned embodiments.

[0056] It should be understood that parts of the present application can be realized by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be realized by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if realized by hardware, and as in another embodiment, any one or a combination of the following technologies known in the art can be used: discrete logic circuit with logic gate circuit for implementing logic function on data signal, application specific integrated circuit with suitable combination logic gate circuit, programmable gate array (PGA), field programmable gate array (FPGA), etc.

[0057] In the description of the present application, the description of the terms “one embodiment”, “some embodiments”, “example”, “specific example” or “some examples” means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above-mentioned terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0058] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0059] In addition, the terms "first", "second", and the like used in the embodiments of the present application are only for the purpose of description, and cannot be understood as indicating or implying relative importance, or implicitly indicating the number of technical features referred to in the embodiments. Therefore, the features defined with "first", "second" and the like in the embodiments of the present application can be explicitly or implicitly indicated to include at least one of the features. In the description of the present application, the meaning of the word "plurality" is at least two or two or more, such as two, three, four, etc., unless otherwise specifically limited in the embodiments.

[0060] In the present application, unless otherwise specifically provided or limited in the embodiments, the terms "mounting", "connecting", "connecting" and "fixing" and the like appearing in the embodiments should be understood broadly, for example, the connection can be fixed connection, or detachable connection, or integral, which can be understood, or can be mechanical connection, electrical connection, etc. Of course, it can also be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific implementation situation.

[0061] In the present application, unless otherwise specifically provided and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0062] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that changes, modifications, substitutions and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A vehicle wet braking control method, characterized in that: include: Detecting current road surface humidity information and determining slip rate information of the vehicle; When it is determined based on the current road surface humidity information that there is water on the current road surface, and when it is determined based on the vehicle slip rate information that the current slip rate of the vehicle reaches a preset threshold, controlling a powder accumulator provided on the corresponding wheel to operate; Detecting the humidity information of the current road surface by a humidity sensor disposed at the bottom of the longitudinal drainage main groove near the middle of the tire tread; Determining whether water is present on the current road surface according to the humidity information of the current road surface includes: When it is determined based on the humidity information of the current road surface that the humidity sensor of the wheel on either side continuously detects a humidity signal, it is determined that water is present on the current road surface, wherein continuously detecting a humidity signal means that the same humidity sensor continuously detects a humidity signal more than twice; or, when it is determined based on the humidity information of the current road surface that the humidity sensors of the wheels on both sides continuously detect a humidity signal, it is determined that water is present on the current road surface, wherein continuously detecting a humidity signal means that the same humidity sensor continuously detects a humidity signal more than twice; Among them, if the humidity signal return time of the left and right wheel humidity sensors is different, and the interval time between the humidity signal return of the front and rear wheel humidity sensors is also not constant, the powder accumulator set on the corresponding wheel will not be controlled to work.

2. The vehicle wet braking control method according to claim 1, characterized in that: Each tire is provided with a first humidity sensor and a second humidity sensor, and the first humidity sensor and the second humidity sensor are symmetrically distributed at 180 degrees within the circumference of the longitudinal drainage main groove.

3. The vehicle wet braking control method according to claim 1, characterized in that: Determining slip rate information of the vehicle, including: The vehicle speed and wheel angular velocity of the vehicle are acquired, and slip rate information of the vehicle is determined according to the vehicle speed and wheel angular velocity.

4. The vehicle wet braking control method according to claim 1, characterized in that: The vehicle includes an air supply assembly, the air supply assembly is connected to the powder accumulator, and the outlet of the powder accumulator is arranged for the tire, wherein the powder accumulator arranged for the corresponding wheel is controlled to work, including: The air supply assembly is controlled to pressurize the powder accumulator so that the powder accumulator blows out a high-pressure airflow carrying magnesium carbonate powder.

5. A computer-readable storage medium, characterized in that A vehicle wet braking control program is stored thereon, and when the vehicle wet braking control program is executed by a processor, the vehicle wet braking control method according to any one of claims 1 to 4 is implemented.

6. A vehicle controller, characterized in that: The invention comprises a memory, a processor and a vehicle wet braking control program stored in the memory and executable on the processor. When the processor executes the vehicle wet braking control program, the vehicle wet braking control method according to any one of claims 1 to 4 is implemented.

7. A vehicle, characterized in that: Including the vehicle controller according to claim 6.

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