Tire pressure adjusting method, system and device and vehicle

Abstract

The invention relates to the technical field of automobile wheels, and provides a tire pressure adjusting method, system and device and a vehicle. When the vehicle is powered on, the following steps are executed: the current load of the vehicle is obtained through a load sensor; target tire pressure is obtained according to the current load; the initial tire pressure of the tire is obtained through a tire pressure sensor; and the tire pressure is adjusted according to the initial tire pressure and the target tire pressure, so that the tire pressure of the tire reaches the target tire pressure. According to the scheme, the load of the vehicle is detected when the vehicle is powered on, at the moment, a general driver prepares to drive, passengers in the vehicle and goods needing to be loaded are in place, then the load does not change greatly, the vehicle is in a static state at the moment, and therefore the load sensor on the vehicle does not generate reading deviation due to movement of the vehicle; and then the tire pressure of each tire can be adjusted in real time through devices such as a vehicle-mounted air pump and a three-way valve so as to improve the comfort of passengers under different load conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile wheels, and in particular to a tire pressure regulating method, system, device and vehicle. Background Art

[0002] According to statistics from the national transportation department, 70% of road traffic casualties are caused by tire problems. The tire pressure of a vehicle plays a vital role in the vehicle's driving safety, comfort, operating energy consumption and tire wear. Too low tire pressure will cause abnormal wear of the tire or damage to the internal structure of the tire. Driving at high speed under low pressure may cause a tire blowout. Too high tire pressure will weaken the friction of the tire and lead to a decrease in braking performance. The tire and wheel frame are more likely to deform due to the impact of driving on uneven roads, and even cause a tire blowout.

[0003] In the prior art, a tire pressure monitoring device is generally installed in the tire, which can obtain the tire pressure value in real time. However, if the members do not check the tire pressure value in time, they can only know that the tire pressure is too low when the tire pressure is too low and an alarm is issued. In addition, the existing tire pressure monitoring device will not alarm when the tire pressure is too high. In addition, the required tire pressure value will be different for different vehicle loads. Since the vehicle load will change continuously according to the increase or decrease of the passengers, the comfort of different vehicle loads under different tire pressures will have certain differences. When using the vehicle, the driver will only maintain the tire pressure of the car at about 2.5bar, and will not adjust the tire pressure in a targeted manner. Summary of the invention

[0004] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a tire pressure regulation method, system, device and vehicle, which can promptly meet the tire pressure requirements of a car under different load scenarios.

[0005] To achieve the above-mentioned purpose and other related purposes, the present invention provides a tire pressure adjustment method, which performs the following steps when the vehicle is powered on:

[0006] Obtaining the current load of the vehicle through a load sensor;

[0007] obtaining a target tire pressure according to the current load;

[0008] Obtain the initial tire pressure of the tire through the tire pressure sensor;

[0009] The tire pressure is adjusted according to the initial tire pressure and the target tire pressure so that the tire pressure of the tire reaches the target tire pressure.

[0010] In a specific embodiment of the present invention, the step of obtaining the current load of the vehicle through the load sensor includes:

[0011] Obtaining a load value on each of the load sensors on each shock absorber;

[0012] The load value on each load sensor is weighted to obtain the current load of the vehicle.

[0013] In a specific embodiment of the present invention, the step of obtaining the target tire pressure according to the current load includes:

[0014] Preset multiple tire pressure values ​​corresponding to multiple load states;

[0015] Get the load status according to the current load;

[0016] The tire pressure value corresponding to the load state is used as the target tire pressure.

[0017] In a specific embodiment of the present invention, the step of adjusting the tire pressure according to the initial tire pressure and the target tire pressure so that the tire pressure reaches the target tire pressure includes:

[0018] When the initial tire pressure is less than the target tire pressure, inflating the tire so that the tire pressure reaches the target tire pressure;

[0019] When the initial tire pressure is greater than the target tire pressure, deflating the tire so that the tire pressure reaches the target tire pressure;

[0020] When the initial tire pressure is equal to the target tire pressure, the tire pressure adjustment is ended.

[0021] The present invention also provides a tire pressure regulating system, comprising:

[0022] A load acquisition module is used to obtain the current load of the vehicle;

[0023] A comparison module, used for obtaining a target tire pressure according to the current load;

[0024] A tire pressure acquisition module, used to obtain the initial tire pressure of the tire;

[0025] The adjustment module is used to adjust the tire pressure according to the initial tire pressure and the target tire pressure so that the tire pressure of the tire reaches the target tire pressure.

[0026] The present invention also provides a tire pressure regulating device, comprising:

[0027] Load sensor;

[0028] Tire pressure sensor;

[0029] air pump;

[0030] A three-way valve is arranged on a side of the tire close to the axis, and the three openings of the three-way valve are respectively connected to the atmosphere, the air pump and the inner cavity of the tire;

[0031] An air circuit, used for connecting the air pump and the three-way valve;

[0032] A control unit, used for controlling the air pump and the three-way valve;

[0033] A wiring harness is used to electrically connect the control unit with the air pump and the three-way valve.

[0034] In a specific embodiment of the present invention, the adjustment device includes a wheel hub bearing fixedly connected relatively to the tire, and the air circuit includes an air chamber arranged in the wheel hub bearing, and the air chamber is connected to the three-way valve and the air pump through a first pipeline and a second pipeline respectively.

[0035] In a specific embodiment of the present invention, the second pipeline is coaxially connected to the wheel hub bearing and forms a rotating seal fit.

[0036] In a specific embodiment of the present invention, the wiring harness between the control unit and the three-way valve is arranged along the air path from the three-way valve to the air pump and then connected to the control unit.

[0037] In a specific embodiment of the present invention, one load sensor is provided on each shock absorber of the vehicle.

[0038] In a specific embodiment of the present invention, the shock absorber is an air spring shock absorber, and the air spring shock absorber is supplied with air by the air pump.

[0039] The present invention also provides a vehicle, comprising the tire pressure regulating device mentioned above.

[0040] The present invention proposes a tire pressure adjustment method, system, device and vehicle. In the above scheme, the vehicle load is detected when the vehicle is powered on. At this time, the driver is generally ready to drive, and the passengers and cargo to be loaded are in place. After that, the load will not change significantly, and the vehicle is stationary at this time, so the load sensor on the vehicle will not produce reading deviation due to the movement of the vehicle. That is to say, the real load of the vehicle can be obtained at this time, and then the optimal tire pressure required at this time can be obtained according to the real load of the vehicle. Then, the tire pressure of each tire can be adjusted in real time through devices such as a vehicle-mounted air pump and a three-way valve to improve the comfort of the passengers under different load conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0042] Figure 1 is a flow chart of a tire pressure adjustment method in one embodiment of the present invention;

[0043] Figure 2 A schematic diagram of an air circuit of a tire pressure regulating device in one embodiment of the present invention;

[0044] Figure 3 Schematic diagram of the arrangement position of the three-way valve of the tire pressure regulating device in one embodiment of the present invention.

[0045] Explanation of the reference numerals: 1. wheel; 10. three-way valve; 20. wheel hub bearing; 30. air chamber; 40. first pipeline; 50. second pipeline. DETAILED DESCRIPTION

[0046] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict.

[0047] It should be noted that the illustrations provided in the following embodiments are only used to schematically illustrate the basic concept of the present invention, and thus the illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0048] Appropriate tire pressure can not only keep the tire's proper grip, but also control fuel consumption within a reasonable range. The standard tire pressure value for each model is generally marked in the vehicle's user manual and on the door frame of the driver's side door. When the tire pressure is too high, the tire's contact area with the ground becomes smaller. Although it can reduce driving resistance and reduce fuel consumption, it will also reduce the tire's grip accordingly, affecting the vehicle's handling stability and braking safety. When the tire pressure is too low, the tire's contact area with the ground becomes larger, and the driving resistance increases, which will not only increase fuel consumption, but also aggravate tire wear. At the same time, the vehicle's load will also affect the tire's contact area with the ground. Therefore, choosing the appropriate tire pressure for different loads can ensure that the tire's contact area with the ground is in a reasonable state that takes into account both braking distance and fuel consumption.

[0049] like Figure 1 As shown, a tire pressure adjustment method is performed when the vehicle is powered on:

[0050] S1. Obtain the current load of the vehicle through a load sensor;

[0051] S2. obtaining a target tire pressure according to the current load;

[0052] S3, obtaining the initial tire pressure of the tire through a tire pressure sensor;

[0053] S4. Adjusting the tire pressure according to the initial tire pressure and the target tire pressure so that the tire pressure of the tire reaches the target tire pressure.

[0054] When the vehicle is powered on, the driver is generally ready to drive, and the passengers and cargo to be loaded are in place. After that, the load will not change significantly, and the vehicle is stationary at this time, so the load sensor on the vehicle will not produce reading deviations due to the movement of the vehicle. The load sensor can be set to one or more, and preferably multiple in this application. The load sensor can be used to obtain the load of the vehicle, and then the tire pressure and load correspondence table can be preset. The target tire pressure can be obtained by looking up the tire pressure corresponding to the load range according to the tire pressure and load correspondence table. The tire pressure is adjusted based on the target tire pressure. If the initial tire pressure is less than the target tire pressure, the tire is inflated. If the initial tire pressure is greater than the target tire pressure, the tire is deflated. If the initial tire pressure is within the target tire pressure ±0.1 bar range, no operation is performed. The target tire pressure can also be the tire pressure set by the driver himself, so that the driver can adjust the tire pressure in the car by himself without the need for the driver to use a manual air pump to inflate.

[0055] In a specific embodiment of the present invention, the step of obtaining the current load of the vehicle through the load sensor includes:

[0056] Obtaining a load value on each of the load sensors on each shock absorber;

[0057] The load value on each load sensor is weighted to obtain the current load of the vehicle.

[0058] In the present application, the load sensor is arranged on the shock absorber, so that the sprung mass of the vehicle can be measured by the load sensor. The unsprung mass of the vehicle is generally fixed, so the sprung mass and the unsprung mass detected by the manufacturer can be added to obtain the mass of the entire vehicle.

[0059] In a specific embodiment of the present invention, the step of obtaining the target tire pressure according to the current load includes:

[0060] Preset multiple tire pressure values ​​corresponding to multiple load states;

[0061] Get the load status according to the current load;

[0062] The tire pressure value corresponding to the load state is used as the target tire pressure. The multiple load states can be divided into three states: no load, half load, and full load, and can also be further refined for different vehicle models.

[0063] In a specific embodiment of the present invention, the step of adjusting the tire pressure according to the initial tire pressure and the target tire pressure so that the tire pressure reaches the target tire pressure includes:

[0064] When the initial tire pressure is less than the target tire pressure, inflating the tire so that the tire pressure reaches the target tire pressure;

[0065] When the initial tire pressure is greater than the target tire pressure, deflating the tire so that the tire pressure reaches the target tire pressure;

[0066] When the initial tire pressure is equal to the target tire pressure, the tire pressure adjustment is ended.

[0067] The present invention also provides a tire pressure regulation system, comprising: a load acquisition module, a comparison module, a tire pressure acquisition module and a regulation module.

[0068] The load acquisition module is used to obtain the current load of the vehicle;

[0069] The comparison module is used to obtain a target tire pressure according to the current load;

[0070] The tire pressure acquisition module is used to obtain the initial tire pressure of the tire;

[0071] The adjustment module is used for adjusting the tire pressure according to the initial tire pressure and the target tire pressure so that the tire pressure of the tire reaches the target tire pressure.

[0072] The present invention also provides a tire pressure regulating device, comprising: a load sensor, a tire pressure sensor, an air pump, a three-way valve 10, an air circuit, a control unit and a wiring harness, which are arranged on a vehicle.

[0073] The three-way valve 10 is arranged on a side of the tire close to the axis, and the three openings of the three-way valve 10 are respectively connected to the atmosphere, the air pump and the inner cavity of the tire;

[0074] The gas path is used to connect the air pump and the three-way valve 10;

[0075] The control unit is used to control the air pump and the three-way valve 10;

[0076] The wiring harness is used to electrically connect the control unit with the air pump and the three-way valve 10 .

[0077] In the above scheme, the three-way valve 10 is used to inflate and deflate the tire. When inflation is required, the inner cavity of the tire is connected to the air pump, and the air pump supplies air to the inner cavity of the tire. When deflation is required, the atmosphere and the inner cavity of the tire are connected, and the tire will deflate under the action of the internal pressure until the tire pressure reaches the target tire pressure and then the three-way valve 10 is closed. Figure 3 As shown, the three-way valve 10 is arranged on a side of the wheel 1 close to the wheel center.

[0078] like Figure 2 As shown, the adjustment system includes a wheel hub bearing 20 fixedly connected to the tire, and the air circuit includes an air chamber 30 arranged in the wheel hub bearing 20, and the air chamber 30 is connected to the three-way valve 10 and the air pump through a first pipeline 40 and a second pipeline 50 respectively. Since the wheel 1 is a rotating part relative to the vehicle body, the wheel hub bearing 20 is arranged to be stationary relative to the wheel 1, so that the first pipeline 40 can be directly connected to the three-way valve 10, and the connection between the air pump and the air chamber 30 is achieved by coaxially rotating the second pipeline 50, and the second pipeline 50 can be arranged inside the axle of the wheel 1.

[0079] like Figure 2 As shown, the second pipeline 50 is coaxially connected with the wheel hub bearing 20 and forms a rotating seal. A rotary joint can be set between the second pipeline 50 and the air chamber 30 to achieve connection. The rotary joint refers to: a pipeline connection device, and the connected pipelines can rotate relatively.

[0080] In a specific embodiment of the present invention, the wiring harness between the control unit and the three-way valve 10 is arranged along the air path from the three-way valve 10 to the air pump and then connected to the control unit. The control wiring harness of the three-way valve 10 also needs to be arranged for rotation, and a conductive rotary joint can be provided on the wiring harness to realize the connection of the wiring harness to avoid the wiring harness from self-twisting and breaking due to rotation. The conductive rotary joint is an electromechanical component that can transmit current and data signals from a fixed device to a rotating device, and is also called a conductive ring, collector ring, collector ring, brush, rotating electrical joint or electrical rotor. The rotary joint is usually installed at the rotation center of the equipment, and is mainly composed of two parts: a rotating part and a stationary part. The rotating part is connected to the rotating shaft of the equipment and rotates with it, which is called a "rotor", and the stationary part is connected to the base of the machine structure of the equipment, which is called a "stator".

[0081] In a specific embodiment of the present invention, the load sensor is provided on each shock absorber of the vehicle. Automobile shock absorbers generally need to support the weight of the entire vehicle body, so that the load sensor is provided on them to obtain the sprung mass of the entire vehicle. The unsprung mass refers to the weight that is not supported by the elastic elements in the suspension system, generally including the wheels 1, springs, shock absorbers and other related components. The sprung mass is the mass of the remaining parts of the vehicle, generally including the frame, power system, transmission, occupants, etc. The unsprung mass will not change after leaving the factory, so the sprung mass and the unsprung mass are added to obtain the vehicle body weight.

[0082] In a specific embodiment of the present invention, the shock absorber is an air spring shock absorber, and the air spring shock absorber is supplied with air by the air pump. The shock absorber in the present application is preferably an air spring shock absorber, and the automobile suspension is a bridge between the vehicle body and the wheel 1, and is an important system for the ride comfort of the automobile. The mechanical spring suspension relied on by the traditional automobile suspension to support the vehicle body, and the height of the vehicle body cannot be adjusted. The air spring can change the height of the vehicle body according to the road conditions and vehicle conditions, greatly improving the vehicle's passing ability and ride comfort. The working process of the air spring is to determine the target lifting speed of the air spring corresponding to the single wheel 1 of the target vehicle, and then control the opening of the proportional control valve corresponding to the air spring according to the target lifting speed, so that the wheel 1 corresponding to the air spring is lifted and lowered according to the lifting and lowering of the air spring. In this way, while the wheel 1 can be lifted and lowered, there is no need to arrange an additional air pump, only the corresponding air circuit and three-way valve 10 need to be arranged, saving costs and reducing the weight of the whole vehicle.

[0083] The present invention also provides a vehicle, comprising the tire pressure regulating device mentioned above.

[0084] In summary, the present invention proposes a tire pressure adjustment method, system, device and vehicle. In the above scheme, the vehicle load is detected when the vehicle is powered on. At this time, the driver is generally ready to drive, and the passengers and cargo to be loaded are in place. The load will not change significantly after that, and the vehicle is stationary at this time. In this way, the load sensor on the vehicle will not produce reading deviation due to the movement of the vehicle. That is to say, the actual load of the vehicle can be obtained at this time, and then the optimal tire pressure required at this time can be obtained according to the actual load of the vehicle. Then, the tire pressure of each tire can be adjusted in real time through the on-board air pump and the three-way valve 10 and other devices to improve the comfort of the passengers under different load conditions.

[0085] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

[0086] In the description herein, many specific details, such as examples of components and / or methods, are provided to provide a complete understanding of embodiments of the present invention. However, those skilled in the art will recognize that embodiments of the present invention may be practiced without one or more of the specific details or with other devices, systems, components, methods, components, materials, parts, etc. In other cases, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the present invention.

[0087] References throughout this specification to "one embodiment," "an embodiment," or "a specific embodiment" mean that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention, and not necessarily in all embodiments. Thus, various appearances of the phrases "in one embodiment," "in an embodiment," or "in a specific embodiment" in different places throughout this specification do not necessarily refer to the same embodiment. In addition, the particular features, structures, or characteristics of any specific embodiment of the invention may be combined with one or more other embodiments in any suitable manner. It should be understood that other variations and modifications of the embodiments of the invention described and illustrated herein may be possible in light of the teachings herein and are to be considered part of the spirit and scope of the invention.

[0088] It should also be understood that one or more of the elements shown in the figures may also be implemented in a more separate or more integrated manner, or even removed because they are inoperable in certain circumstances or provided because they may be useful depending on the application.

[0089] In addition, unless otherwise explicitly stated, any marking arrows in the drawings should be regarded as exemplary only and not limiting. In addition, unless otherwise specified, the term "or" used herein is generally intended to mean "and / or". In the case where the term is unclear because it is anticipated that the ability to separate or combine is provided, the combination of components or steps will also be regarded as specified.

[0090] As used in the description herein and throughout the claims that follow, "a", "an", and "the" include plural references unless otherwise indicated. Likewise, as used in the description herein and throughout the claims that follow, the meaning of "in" includes "in" and "on" unless otherwise indicated.

[0091] The above description of the illustrated embodiments of the present invention (including the contents described in the Abstract) is not intended to be an exhaustive list or to limit the present invention to the precise form disclosed herein. Although specific embodiments of the present invention and examples of the present invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention as will be recognized and appreciated by those skilled in the art. As noted, these modifications may be made to the present invention in accordance with the above description of the embodiments described in the present invention, and these modifications will be within the spirit and scope of the present invention.

[0092] Systems and methods have been generally described herein as details that aid in understanding the present invention. In addition, various specific details have been given to provide an overall understanding of embodiments of the present invention. However, those skilled in the relevant art will recognize that embodiments of the present invention may be practiced without one or more of the specific details, or may be practiced using other devices, systems, accessories, methods, components, materials, parts, etc. In other cases, well-known structures, materials, and / or operations are not specifically shown or described in detail to avoid confusion with various aspects of embodiments of the present invention.

[0093] Thus, although the invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the foregoing disclosure, and it should be understood that in some cases, some features of the invention will be employed without the corresponding use of other features without departing from the scope and spirit of the proposed invention. Thus, many modifications may be made to adapt a particular environment or material to the essential scope and spirit of the invention. The invention is not intended to be limited to the specific terms used in the claims below and / or the specific embodiments disclosed as the best mode contemplated for carrying out the invention, but the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Thus, the scope of the invention will be determined solely by the appended claims.

Claims

1. A tire pressure regulation method, characterized in that: Perform the following steps with the vehicle powered on: Obtaining the current load of the vehicle through a load sensor; obtaining a target tire pressure according to the current load; Obtain the initial tire pressure of the tire through the tire pressure sensor; The tire pressure is adjusted according to the initial tire pressure and the target tire pressure so that the tire pressure of the tire reaches the target tire pressure.

2. The tire pressure regulating method according to claim 1, characterized in that: The step of obtaining the current load of the vehicle through the load sensor includes: Obtaining a load value on each of the load sensors on each shock absorber; The load value on each load sensor is weighted to obtain the current load of the vehicle.

3. The tire pressure regulating method according to claim 1, characterized in that: The step of obtaining a target tire pressure according to the current load includes: Preset multiple tire pressure values ​​corresponding to multiple load states; Get the load status according to the current load; The tire pressure value corresponding to the load state is used as the target tire pressure.

4. The tire pressure regulating method according to claim 1, characterized in that: The step of adjusting the tire pressure according to the initial tire pressure and the target tire pressure so that the tire pressure reaches the target tire pressure includes: When the initial tire pressure is less than the target tire pressure, inflating the tire so that the tire pressure reaches the target tire pressure; When the initial tire pressure is greater than the target tire pressure, deflating the tire so that the tire pressure reaches the target tire pressure; When the initial tire pressure is equal to the target tire pressure, the tire pressure adjustment is ended.

5. A tire pressure regulation system, characterized in that: include: A load acquisition module is used to obtain the current load of the vehicle; A comparison module, used for obtaining a target tire pressure according to the current load; A tire pressure acquisition module, used to obtain the initial tire pressure of the tire; The adjustment module is used to adjust the tire pressure according to the initial tire pressure and the target tire pressure so that the tire pressure of the tire reaches the target tire pressure.

6. A tire pressure regulating device, characterized in that: Included in the vehicle: Load sensor; Tire pressure sensor; air pump; A three-way valve is arranged on a side of the tire close to the axis, and the three openings of the three-way valve are respectively connected to the atmosphere, the air pump and the inner cavity of the tire; An air circuit, used for connecting the air pump and the three-way valve; A control unit, used for controlling the air pump and the three-way valve; A wiring harness is used to electrically connect the control unit with the air pump and the three-way valve.

7. The tire pressure regulating device according to claim 6, characterized in that: The adjusting device comprises a wheel hub bearing fixedly connected to the tire, and the air circuit comprises an air chamber arranged in the wheel hub bearing, and the air chamber is connected to the three-way valve and the air pump through a first pipeline and a second pipeline respectively.

8. The tire pressure regulating device according to claim 7, characterized in that: The second pipeline is coaxially connected to the wheel hub bearing and forms a rotating seal fit.

9. The tire pressure regulating device according to claim 8, characterized in that: The wiring harness between the control unit and the three-way valve is arranged along the air path from the three-way valve to the air pump and then connected to the control unit.

10. The tire pressure regulating device according to claim 6, characterized in that: One load sensor is arranged on each shock absorber of the vehicle.

11. The tire pressure regulating device according to claim 10, characterized in that: The shock absorber is an air spring shock absorber, and the air spring shock absorber is supplied with air by the air pump.

12. A vehicle, characterized in that: It comprises a tire pressure regulating device as described in any one of claims 6-10.

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