Tire air pressure automatic distribution control system, method and vehicle

Abstract

The application discloses a kind of tire pressure automatic distribution control system, method and vehicle, belong to vehicle monitoring technical field, including tire pressure monitoring sensor assembly, tire pressure monitoring controller assembly, force sensor, electronic control unit, control valve and actuator;The electronic control unit is configured to receive tire pressure data from the tire pressure monitoring controller assembly and tire load data of the force sensor, and according to the received data, the opening or closing of the control valve is controlled. Both can monitor tire pressure in real time, and can quickly respond to achieve automatic inflation / automatic deflation, so that the tire pressure is maintained in the factory set standard range, prolongs the service life of tire, reduces vehicle energy consumption, energy saving and emission reduction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle monitoring, and more particularly, to a tire pressure automatic distribution control system and method and a vehicle. BACKGROUND

[0002] At present, most of the mainstream vehicle models on the market are equipped with tire pressure monitoring devices. The common design architecture of such devices is composed of two parts of hardware. One is the sensor and transmitter combination component installed inside the tire, in which the sensor adopts a bridge type electronic sensing technology, has high precision real-time sensing capability, and can accurately measure the internal pressure value of each tire. The other is the receiver and display assembly installed in the driver's cabin. The transmitter transmits the collected pressure data to the receiver through wireless radio frequency (RF) communication, and then the display presents the received data to the driver, thereby achieving real-time monitoring of the tire pressure condition. Once any tire pressure is abnormal, the tire pressure monitoring device will immediately issue an audible and visual alarm to the driver.

[0003] However, the existing conventional tire pressure monitoring device has significant limitations. Although it can detect tire pressure abnormalities in real time and remind the driver in time, it is obviously lacking in function when dealing with pressure problems. When the tire is in a low pressure condition, it cannot automatically implement pressure compensation operation, and the driver has to carry a tire inflator or use a cumbersome operation process such as an external battery to complete the inflation. In the high-speed driving scenario, if the tire pressure is insufficient, stopping to inflate the tire by oneself is not only very inconvenient, but also has a high safety risk.

[0004] A solution is currently available to achieve automatic tire inflation and deflation, which requires extensive arrangement of air sources, control valves, steering air passages, half shaft air passages, sealed air chambers, rim air passages and other complex hardware and software facilities in the vehicle. For example, the vehicle tire automatic inflation and deflation device disclosed in Chinese patent CN110154653A has its air source connected to the control valve, and the wheel edge device assembly builds a complex air passage connection network, which includes the steering air passage arranged inside the steering knuckle of the vehicle, the half shaft air passage arranged inside the half shaft, the sealed air chamber arranged in the ring shape outside the half shaft inside the steering knuckle, and the rim air passage arranged inside the rim. Each air passage is connected layer by layer, and finally communicates with the vehicle tire, so as to achieve control of the inflation and deflation of the vehicle tires.

[0005] However, the prior art scheme has the following main defects: ① more and more complex software and hardware need to be arranged on the whole vehicle, which increases the weight of the whole vehicle; ② air passages need to be arranged in many parts, such as steering knuckles, half shafts, rims, etc., which has unknown risks such as matching interference; ③ the increased software and hardware are too complex, and it is difficult to diagnose and solve any problems, which needs to be judged one by one, which is time-consuming and laborious; ④ special working conditions (such as overload) are not considered, and even if the tire pressure standard set by the manufacturer is used, the tire may exceed or endanger the carrying capacity of the tire, causing tire explosion and other dangerous situations. SUMMARY

[0006] An object of the present application is to provide a tire pressure automatic distribution control system, method and vehicle, which can automatically distribute and control in real time when the tire pressure is too high or too low to maintain the tire pressure within the manufacturer's standard range.

[0007] According to a first aspect of the present application, a tire pressure automatic distribution control system is provided, comprising a tire pressure monitoring sensor assembly, a tire pressure monitoring controller assembly, a force sensor, an electronic control unit, a control valve and an actuator; wherein,

[0008] The tire pressure monitoring sensor assembly monitors the tire pressure of each wheel position in real time and transmits the monitored data to the tire pressure monitoring controller assembly;

[0009] The force sensor is used to measure the tire load of each wheel position in real time and transmit the measurement data to the electronic control unit;

[0010] The electronic control unit is configured to receive tire pressure data from the tire pressure monitoring controller assembly and tire load data from the force sensor, and control the opening or closing of the control valve according to the received data;

[0011] The actuator completes the deflation and inflation of the corresponding tire according to the opening and closing state of the control valve.

[0012] Optionally, the tire pressure monitoring sensor assembly comprises a first sensor, a second sensor, a third sensor and a fourth sensor, which respectively monitor the tire pressure of each wheel position.

[0013] Optionally, when the difference between the tire pressure data received by the electronic control unit and the preset pressure threshold value reaches a preset numerical range, an alarm is given, and an instruction is issued to the control valve, and the preset numerical range is 20%-40%.

[0014] Optionally, when the difference between the tire pressure data received by the electronic control unit and the preset pressure threshold value exceeds 25%, an alarm is triggered.

[0015] Optionally, the electronic control unit calculates the tire load rate A of each wheel position according to the tire load data measured by the force sensor, according to the formula A = F / g / m * 100%, unit: %;

[0016] Wherein, F is the Z-direction force value of each wheel position tire measured by the force sensor in real time, unit: N;

[0017] g is the acceleration of gravity, unit: m / s / s;

[0018] m is the tire load capacity, unit: kg.

[0019] Optionally, the calculated tire load rate A is matched with the set load rate, and the upper limit range of the set load rate is configured to be in the range of 80%-90%, and when the upper limit range of the set load rate is exceeded, a trigger instruction is transmitted to the control valve.

[0020] Optionally, when the electronic control unit determines that the tire load rate of a certain wheel position is greater than 88%, a tire inflation trigger instruction is transmitted to the control valve, and the priority of the tire inflation trigger instruction is higher than the tire air pressure standard set by the manufacturer. During the inflation process, the electronic control unit continues to calculate the tire load rate A according to the real-time updated data of the force sensor, and when the tire load rate decreases to 88%, a release instruction is transmitted to the actuator to stop the inflation action.

[0021] Optionally, the opening or closing of the control valve is controlled according to the received data, when the control valve opens the tire inflation channel, the actuator inflates the tire, and when the control valve opens the tire deflation channel, the actuator deflates the tire.

[0022] According to the second aspect of the present application, a tire air pressure automatic distribution control method is provided, which uses the tire air pressure automatic distribution control system of the first aspect of the present application, comprising:

[0023] Real-time monitoring of the tire air pressure of each wheel position;

[0024] Real-time measurement of the tire load of each wheel position;

[0025] Controlling the opening or closing of the control valve according to the tire air pressure and the tire load data;

[0026] According to the opening and closing state of the control valve, the deflation and inflation actions of the corresponding wheel position tire are completed.

[0027] According to the third aspect of the present application, a vehicle is provided, comprising the tire air pressure automatic distribution control system of the first aspect of the present application.

[0028] The tire pressure automatic distribution control system, method and vehicle according to the present disclosure have the following technical effects:

[0029] The electronic control unit is configured to receive tire pressure data from the tire pressure monitoring controller assembly and tire load data from the force sensor, and control the opening or closing of the control valve according to the received data. Both real-time monitoring of tire pressure and quick response to achieve automatic inflation / automatic deflation can maintain the tire pressure within the manufacturer's standard range, prolong the service life of the tire, reduce the energy consumption of the vehicle, save energy and reduce emissions, and also avoid the danger of stopping to adjust the pressure under special working conditions such as high speed, thereby maximizing driving safety and meeting the increasingly strong multi-dimensional experience demands of customers and the market for comfort, stability, NVH, etc.

[0030] Other features of the present application, and their advantages, will become apparent from the following detailed description of illustrative embodiments thereof. BRIEF DESCRIPTION OF DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0032] Figure 1 A structural schematic diagram of a tire pressure automatic distribution control system according to an embodiment of the present application is provided.

[0033] Figure 2 A flowchart of a tire pressure automatic distribution control method according to an embodiment of the present application is provided.

[0034] The symbols in the drawings are indicated as follows:

[0035] 11, first sensor; 12, second sensor; 13, third sensor; 14, fourth sensor; 2, tire pressure monitoring controller assembly; 3, force sensor; 4, electronic control unit; 5, control valve; 6, actuator. DETAILED DESCRIPTION

[0036] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0037] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the application or its applications or uses.

[0038] Techniques, methods, and apparatus known to those of ordinary skill in the relevant art(s) can not be discussed in detail herein, but should be considered within the scope of the present disclosure.

[0039] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not limiting. Thus, other examples of the exemplary embodiments can have different values.

[0040] The present disclosure proposes an embodiment of a tire pressure automatic distribution control system, specifically as shown in Figure 1 which includes a tire pressure monitoring sensor assembly, a tire pressure monitoring controller assembly 2, a force sensor 3, an electronic control unit 4, a control valve 5, and an actuator 6; wherein,

[0041] The tire pressure monitoring sensor assembly monitors the tire pressure of each wheel position in real time and transmits the monitored data to the tire pressure monitoring controller assembly 2; specifically, the tire pressure monitoring sensor assembly includes a first sensor 11, a second sensor 12, a third sensor 13, and a fourth sensor 14, which respectively monitor the tire pressure of each wheel position. The first sensor 11, the second sensor 12, the third sensor 13, and the fourth sensor 14 are piezoresistive sensors or capacitive sensors and are installed near the tire valve or at a specific position of the rim. They have high sensitivity characteristics and can accurately distinguish pressure fluctuations of a few pounds per square inch (psi), ensuring that any slight pressure abnormalities can be detected in time and ensuring the accuracy of the pressure monitoring. The tire pressure monitoring controller assembly 2 can convert the received monitoring data into a standard data format that can be directly recognized and processed by the electronic control unit 4, ensuring smooth and accurate data flow.

[0042] The force sensor 3 is used to measure the tire load of each wheel position in real time and transmits the measurement data to the electronic control unit 4; the force sensor 3 is installed at a specific area of the vehicle suspension component, the axle key stress point, or the hub, and is closely related to the tire stress path.

[0043] The electronic control unit 4 is configured to receive the tire pressure data from the tire pressure monitoring controller assembly 2 and the tire load data from the force sensor 3, and to control the opening or closing of the control valve 5 according to the received data; specifically, if the tire pressure is too low and the load is too high, the electronic control unit 4 quickly calculates that emergency inflation is needed to balance the load pressure, and immediately drives the control valve 5 to open the inflation channel; conversely, when the pressure is too high and the load is normal, the control valve 5 is instructed to open the deflation path to achieve dynamic pressure adaptation, which is fully automated and responds at a millisecond level. The control valve 5 is in the form of an electromagnetic valve and has high sealing performance to prevent gas leakage and cause pressure regulation errors.

[0044] The actuator 6, based on the opening and closing status of the control valve 5, completes the deflation and inflation actions of the corresponding tire position. Specifically, the actuator 6 includes an air pump, a deflation valve, and matching connecting pipeline components. The air pump starts according to the inflation command of the control valve 5, draws air from the air source, and pumps it into the tire at high speed through the pressure-resistant pipeline to quickly increase the air pressure; the deflation valve precisely opens to a specific degree under the deflation command, allowing the air in the tire to escape stably at a set rate.

[0045] In this embodiment of the invention, when the tire pressure data received by the electronic control unit 4 differs from a preset pressure threshold by a value exceeding a preset range, an alarm is triggered, and a command is sent to the control valve 5. The preset range is 20%-40%. Specifically, an alarm is triggered when the difference between the tire pressure data received by the electronic control unit 4 and the preset pressure threshold exceeds 25%.

[0046] It's important to note that the 20%-40% range is a key factor in balancing false alarm rate and timely risk warning. If the range is set too narrow, such as within 10%, while it can extremely accurately detect changes in air pressure, it is easily affected by sudden pressure fluctuations caused by vehicle movement, such as rapid acceleration, sudden braking, or brief road bumps, leading to frequent false alarms. Conversely, if the range is too wide, such as above 50%, while it reduces false alarms, it may miss early signs of slow, abnormal changes in air pressure. By the time the difference reaches this lenient limit, the tires may already be nearing a dangerous condition, missing the optimal time for intervention. In high-speed driving scenarios, the system can quickly issue an alarm at the critical point of a 25% air pressure deviation, allowing the driver to smoothly decelerate and safely pull over to the emergency lane for inspection.

[0047] In this embodiment of the invention, the electronic control unit 4 calculates the tire load rate A for each wheel position based on the tire load data measured by the force sensor 3, according to the formula A = F / g / m * 100%, with units of % %.

[0048] Where F is the Z-direction force value of each wheel position tire measured in real time by force sensor 3, in N;

[0049] g is the acceleration due to gravity, with units of m / s / s.

[0050] m represents the tire's load capacity, measured in kg.

[0051] The electronic control unit 4 has a built-in computing module and uses the real-time data transmitted by the force sensor 3 as its foundation. A high-speed and stable data link is established between the force sensor 3 and the electronic control unit 4. The CAN bus or a dedicated wireless transmission protocol with strong anti-interference is used to ensure that the force signal is transmitted in real time and without loss.

[0052] In the embodiment of the present application, the calculated tire load rate A is matched with the set load rate, the upper limit range of the set load rate is configured to be in the interval of 80%-90%, and the trigger instruction is transmitted to the control valve 5 when the upper limit range of the set load rate is exceeded. It should be noted that the lower limit of 80% is the basic defense line to ensure the long-term reliable operation of the tire and delay fatigue damage, and the tire internal cord, rubber layer and other structures can effectively resist the cumulative damage of daily driving when maintained above this value; the upper limit of 90% is the red alert line close to the tire limit load, and once it is reached, the risk of catastrophic failure such as tire blowout and delamination increases exponentially.

[0053] In the embodiment of the present application, when the electronic control unit 4 determines that the tire load rate of a certain wheel position is greater than 88%, the inflation trigger instruction is transmitted to the control valve 5, and the priority of the inflation trigger instruction is higher than the tire air pressure standard set by the manufacturer. During the inflation process, the electronic control unit continuously calculates the tire load rate A based on the real-time data updated by the force sensor, and when the tire load rate decreases to 88%, the release instruction is transmitted to the actuator 6 to stop the inflation action. When the limit of 88% is exceeded, the cord structure inside the tire will bear excessive tensile stress, and the rubber layer will also face the risk of rapid fatigue and aging, and the risk of tire blowout will increase sharply. It should be noted that the tire air pressure standard set by the manufacturer focuses on optimizing the normal performance of the tire, such as ensuring the lowest rolling resistance and uniform wear for economic and comfortable indicators; when the load rate exceeds the standard, the integrity of the tire structure is in danger, and the need for pressure reduction is far beyond the consideration of conventional pressure adaptation. By strictly following the red line of tire load rate, the damage to the internal structure of the tire is significantly reduced, and the aging failure phenomena such as cord rupture and rubber layer cracking are greatly suppressed. Stable and reasonable tire load ensures that the vehicle handling stability is always consistent, and during driving, due to the good condition of the tire, the road bumps are filtered more thoroughly, the in-vehicle vibration and noise are significantly reduced, and the driving comfort is greatly improved.

[0054] In the embodiment of the present application, the opening or closing of the control valve 5 is controlled according to the received data, when the control valve 5 opens the tire inflation channel, the actuator 6 inflates the tire, and when the control valve 5 opens the tire deflation channel, the actuator 6 deflates the tire. By quickly and accurately adjusting the air pressure, the risk of tire blowout caused by abnormal air pressure is eliminated, the incidence of tire blowout accidents during high-speed driving is greatly reduced, and the risk of vehicle loss of control caused by tire air pressure hazards is effectively prevented in complex urban road conditions.

[0055] The present application also provides an embodiment of a tire air pressure automatic distribution control method, as shown in Figure 2 The present application also provides an embodiment of a tire air pressure automatic distribution control method, as shown in

[0056] Real-time monitoring of the tire air pressure of each wheel position and transmitting the monitored data to the tire pressure monitoring controller assembly;

[0057] Real-time measurement of each wheel position tire load, and measured data transmission to the electronic control unit;

[0058] The electronic control unit controls the opening or closing of the control valve according to the tire pressure data and tire load data;

[0059] According to the opening and closing state of the control valve, the deflation and inflation of the corresponding wheel position tire is completed.

[0060] It should be noted that the execution process and the like between the above methods are based on the same concept as the system embodiments of the present application, and are methods corresponding to the above tire pressure automatic distribution control system. All the implementation structures in the above system embodiments are applicable to the embodiments of the method. The specific functions and the resulting technical effects can be referred to in the system embodiment section, and will not be described here.

[0061] The present application also provides a vehicle embodiment comprising the above-mentioned tire pressure automatic distribution control system. The vehicle of the present application can intervene at the initial stage of abnormal pressure or excessive load, effectively reducing the probability of tire burst. It ensures that the tire can maintain good performance under various complex working conditions. Precise automatic pressure distribution can keep the tire pressure within the appropriate range at all times.

[0062] The above embodiments shown in the drawings explain the structure, features and effects of the present application in detail, but the above is only the preferred embodiment of the present application. It should be noted that the technical features involved in the above embodiments and preferred modes can be reasonably combined and matched into various equivalent schemes by those skilled in the art without departing from or changing the design idea and technical effects of the present application. Therefore, the present application is not limited by the drawings shown in the drawings. Any change or modification made in accordance with the concept of the present application, or any equivalent embodiment within the scope of the present application, shall be within the scope of the present application.

Claims

1. A tire air pressure automatic distribution control system characterized by, The tire pressure monitoring sensor assembly, the tire pressure monitoring controller assembly (2), the force sensor (3), the electronic control unit (4), the control valve (5) and the actuator (6); wherein, The tire pressure monitoring sensor assembly monitors the tire pressure of each wheel position in real time and transmits the monitored data to the tire pressure monitoring controller assembly (2); The force sensor (3) is used to measure the tire load of each wheel position in real time and transmit the measurement data to the electronic control unit (4); The electronic control unit (4) is configured to receive tire pressure data from the tire pressure monitoring controller assembly (2) and tire load data from the force sensor (3), and control the opening or closing of the control valve (5) according to the received data; the actuator (6) completes the deflation and inflation of the corresponding wheel position according to the opening and closing state of the control valve (5), including: The electronic control unit (4) calculates the tire load rate A of each wheel position according to the tire load data measured by the force sensor (3) according to the formula A = F / g / m * 100%, unit: %; wherein, F is the Z-direction force value of each wheel position measured by the force sensor (3), unit: N; g is the acceleration of gravity, unit: m / s / s; m is the tire load capacity, unit: kg; The calculated tire load rate A is matched with the set load rate, and the upper limit range of the set load rate is configured to be in the range of 80%-90%, and when the upper limit range of the set load rate is exceeded, an instruction is transmitted to the control valve, specifically: When the electronic control unit (4) determines that the tire load rate of a certain wheel position is greater than 88%, an inflation trigger instruction is transmitted to the control valve (5), and the priority of the inflation trigger instruction is higher than that of the tire pressure standard set by the manufacturer. During inflation, the electronic control unit continues to calculate the tire load rate A based on the real-time data updated by the force sensor until the tire load rate decreases to 88%, and then releases an instruction to the actuator (6) to stop the inflation action.

2. The automatic tire pressure distribution control system according to claim 1, wherein The tire pressure monitoring sensor assembly includes a first sensor (11), a second sensor (12), a third sensor (13) and a fourth sensor (14), and the first sensor (11), the second sensor (12), the third sensor (13) and the fourth sensor (14) monitor the tire pressure of each wheel position.

3. The automatic tire pressure distribution control system according to claim 1, wherein When the difference between the tire pressure data received by the electronic control unit (4) and the preset pressure threshold reaches the preset numerical range, an alarm is given, and an instruction is issued to the control valve (5), and the preset numerical range is 20%-40%.

4. The automatic tire pressure distribution control system according to claim 3, wherein When the difference between the tire pressure data received by the electronic control unit (4) and the preset pressure threshold exceeds 25%, an alarm is triggered.

5. The automatic tire pressure allocation control system according to claim 1, wherein According to the received data, the opening or closing of the control valve (5) is controlled, when the control valve (5) opens the tire inflation channel, the actuator (6) inflates the tire, when the control valve (5) opens the tire deflation channel, the actuator (6) deflates the tire.

6. A method for automatically distributing tire air pressure, using the tire air pressure automatically distributing control system according to any one of claims 1 to 5, characterized by, Comprise: Real-time monitoring of the tire pressure of each wheel position; Real-time measurement of the tire load of each wheel position; According to the tire pressure and tire load data, the opening or closing of the control valve is controlled; According to the opening and closing state of the control valve, the deflation and inflation of the corresponding wheel position tire are completed.

7. A vehicle characterized by comprising: The tire pressure automatic distribution control system according to any one of claims 1 to 5.

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