Motor vehicle tire burst early warning system and method

Abstract

The invention relates to a motor vehicle tire burst early warning system and method.The system comprises a vehicle state information collecting module, a simulation algorithm module, an engine control module and a display module, after the vehicle state information collecting module collects vehicle information, corresponding calculation is conducted through the simulation algorithm module, and the calculated real-time temperature of the axle wheel end is obtained; and the temperature is compared with temperature threshold values of different vehicle speed intervals to judge whether an early warning signal is sent out or not. According to the early warning method, vehicle early warning and deceleration control are achieved based on the early warning system. The driver is reminded to change the driving behavior from the early warning angle, and the occurrence probability of tire burst accidents can be reduced.

Description

Technical Field

[0001] The present application belongs to the technical field of vehicle safety warning, and specifically relates to a tire blowout warning system and method for a motor vehicle. Background Art

[0002] The probability of heavy trucks having a tire blowout increases significantly in hot weather. The reason is that heavy trucks with heavy loads and high speeds need to brake frequently when dealing with urban road conditions, and the drum brakes and wheel-end dust covers used by heavy trucks form a closed space that cannot quickly dissipate the heat energy generated during braking. In addition, the double-type wheels have a smaller wind-receiving area, which further increases the heat dissipation capacity. It is not difficult to infer from the above reasons that tires closer to the inside of the vehicle are more prone to blowouts than tires on the outside, and hot weather significantly increases the risk of blowouts.

[0003] There are few solutions to the problem of heavy truck tire blowouts under existing technologies. The existing water spray bag solution is also seasonally time-sensitive due to winter ice formation, and the emerging water-cooled bridges and axle brake air-cooled retarder devices are not mature enough. Summary of the invention

[0004] To solve the above problems, the present application proposes a motor vehicle tire blowout warning system and method, which reminds the driver to change his driving behavior from a warning perspective and reduce the probability of tire blowout accidents.

[0005] The technical solution adopted by the present invention is: In a first aspect, the present application provides a tire blowout warning system for a motor vehicle, the system comprising: A vehicle status information collection module, which is used to collect the vehicle's speed, weight, and number of braking times, and upload the collected data to the cloud; A simulation algorithm module, wherein the simulation algorithm module performs calculations based on the data collected by the vehicle status information acquisition module and establishes a wheel-end temperature simulation model according to vehicle parameters, and issues or releases a warning signal according to a comparison result between a temperature calculation value within a set time period and a set temperature threshold; the wheel-end temperature simulation model includes a heating process and a cooling process; An engine control module, used to respond to the signal action of the algorithm simulation module to control the vehicle speed; A display module is used to display a warning to the driver.

[0006] Furthermore, the vehicle parameters include the volume, material, heat capacity of the brake, the braking torque, load, number of braking times, vehicle speed, and speed reduction after a single braking.

[0007] Furthermore, the temperature growth model of the axle wheel end temperature simulation model during the heating process is: ; ; In the formula, J The energy generated by braking, m Indicates vehicle weight. V s Indicates the initial braking speed. V d Indicates the braking end speed. h s Indicates the initial elevation of braking. h d Indicates the elevation at which braking ends; g represents the acceleration due to gravity; T i Indicates the temperature increase of a single brake; t z Indicates braking time; m i Indicates the quality of the brake, C p Indicates the thermal capacity of the brake.

[0008] Furthermore, the final temperature of the axle wheel end heating process T i for: ; In the formula, T Outside indicates the outdoor temperature.

[0009] Furthermore, the temperature cooling model of the axle wheel end cooling process is: ; In the formula, Indicates that the axle is in a non-braking period Cooling temperature of the inner wheel end brake; Indicates the brake friction surface area; represents the empirical coefficient; Indicates the running time of the vehicle speed greater than 8km / h before the next braking; Indicates the final temperature of the axle wheel end during the previous braking.

[0010] Furthermore, the temperature calculation value within the set period T 1 is: .

[0011] In a second aspect, the present application provides a motor vehicle tire blowout warning method, comprising the following steps: S1) Collect the data required by the simulation algorithm module when the vehicle is running in real time, and input it into the simulation algorithm module to calculate the real-time temperature of the wheel end of the axleT 1; S2) setting a number of set temperature thresholds corresponding to the vehicle speed interval according to the vehicle speed interval; calculating the temperature value of the wheel end of the axle within the set period T 1 matches the current vehicle speed range; S3) Comparison T 1 and the set temperature threshold of its speed range, when T 1 When the temperature exceeds the set threshold, the display module will display a warning and prompt the driver to reduce the speed to the recommended speed. V 0, until the real-time temperature T 1 When the temperature is less than or equal to the threshold, the warning is lifted; If you set the duration T s Failure to reduce speed to recommended speed V 0, the simulation algorithm module sends a speed limit request to the engine to reduce the vehicle speed until the real-time temperature T 1 is less than the set temperature threshold corresponding to the vehicle speed range; Furthermore, the condition for issuing the warning in step S3) must be satisfied that the vehicle weight collected by the vehicle status information collection module is greater than the preset vehicle weight in the simulation algorithm module.

[0012] Due to the adoption of the above technical solution, the present invention has the following beneficial effects: 1. This application calculates the real-time temperature of the wheel end of the axle based on a large amount of cloud big data through an algorithm simulation model. The data obtained is real-time, fast and low-cost. Through the fast calculation of the algorithm simulation module, the temperature change of the wheel end of the axle can be obtained in time, and the driver can be reminded to take corresponding braking measures in time.

[0013] 2. This application fully considers the trouble caused by excessive warnings to drivers. In this application, the algorithm simulation module performs comprehensive calculations on the heating process and cooling process within a time period, and compares the comprehensive calculation results with the set temperature threshold. Warnings are only issued when the temperature within this time period exceeds the threshold. That is, this application establishes a prerequisite for the triggering of warnings, avoiding excessive warnings caused by relying solely on instantaneous temperature for warnings, thereby avoiding unnecessary warnings that interfere with the driver's subjective judgment.

[0014] 3. This application uses a program warning method to avoid the situation where the explosion-proof tire setting is unavailable due to temperature changes caused by changes in driving scenarios. This application uses program monitoring to achieve early warning, without relying on physical components related to explosion-proofing. The system and method provided in this application have a wider range of application scenarios and are not limited by weather conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1A motor vehicle tire blowout warning system architecture diagram provided for this application; Figure 2 A flow chart of a motor vehicle tire blowout warning method provided in this application. DETAILED DESCRIPTION

[0016] Based on the background technology, the present application provides a motor vehicle tire blowout warning system, a motor vehicle tire blowout warning system, the system comprising: The vehicle status information collection module is used to collect the vehicle's speed, weight, and number of braking times, and upload the collected data to the cloud.

[0017] A simulation algorithm module, which performs calculations based on the data collected by the vehicle status information acquisition module and establishes a wheel-end temperature simulation model according to the vehicle parameters, and issues or releases a warning signal according to the comparison result between the temperature calculation value within a set time period and the set temperature threshold; the wheel-end temperature simulation model includes a heating process and a cooling process. The vehicle parameters include the volume, material, and heat capacity of the brake, the braking torque, load, number of brakes, vehicle speed, and the speed reduction of a single brake. It should be noted that the speed reduction of single-braking needs to be set in advance.

[0018] The temperature growth model of the axle wheel end temperature simulation model during the heating process is: ; ; In the formula, J The energy generated by braking, m Indicates vehicle weight. V s Indicates the initial braking speed. V d Indicates the braking end speed. h s Indicates the initial elevation of braking. h d Indicates the elevation at which braking ends; g represents the acceleration due to gravity; T i Indicates the temperature increase of a single brake; t z Indicates braking time; m i Indicates the quality of the brake, C p Indicates the thermal capacity of the brake.

[0019] Final temperature of the axle wheel end heating process T i for: ; In the formula, T Outside indicates the outdoor temperature.

[0020] The temperature cooling model of the axle wheel end cooling process is: ; In the formula, Indicates that the axle is in a non-braking period Cooling temperature of the inner wheel end brake; Indicates the brake friction surface area; represents the empirical coefficient; Indicates the running time of the vehicle speed greater than 8km / h before the next braking; Indicates the final temperature of the axle wheel end during the previous braking.

[0021] It should be noted that h It is an empirical coefficient, 40000 for the front axle and 20000 for the rear axle. Indicates taking 480.

[0022] Calculated temperature value within the set period T 1 is: .

[0023] In this application, the temperature calculation value is calculated within a set period, not based on the calculation result of a certain step. Only when the temperature within this period accumulates and reaches the set temperature threshold, will an early warning be issued.

[0024] The engine control module is used to respond to the signal action of the algorithm simulation module to control the vehicle speed, which can be realized with the help of existing technology.

[0025] The display module is used to display a warning to the driver. It should be noted that the warning method is not limited to sound, text or image display.

[0026] The present application also provides a motor vehicle tire blowout warning method, comprising the following steps: S1) Collect the data required by the simulation algorithm module when the vehicle is running in real time, and input it into the simulation algorithm module to calculate the real-time temperature of the wheel end of the axle T 1; S2) setting a number of set temperature thresholds corresponding to the vehicle speed interval according to the vehicle speed interval; calculating the temperature value of the wheel end of the axle within the set period T 1 matches the current vehicle speed range; In one embodiment, the set temperature threshold of the front axle of the tractor at 80-100 km / h is 150 degrees Celsius, and the set temperature threshold of the rear axle is 250 degrees Celsius; the set temperature threshold of the front axle of the tractor at 0-10 km / h is 100 degrees Celsius, and the set temperature threshold of the rear axle is 200 degrees Celsius. The set threshold is obtained based on the uploaded data of the driving process of the faulty vehicle.

[0027] S3) Comparison T 1 and the set temperature threshold of its speed range, when T 1 When the temperature exceeds the set threshold, the display module will display a warning and prompt the driver to reduce the speed to the recommended speed. V 0, until the real-time temperature T 1 When the temperature is less than or equal to the threshold, the warning is lifted; If you set the duration T s Failure to reduce speed to recommended speed V 0, the simulation algorithm module sends a speed limit request to the engine to reduce the vehicle speed until the real-time temperature T 1 is less than the set temperature threshold corresponding to the vehicle speed range; The condition for issuing the warning in step S3) must be satisfied: the vehicle weight collected by the vehicle status information collection module is greater than the preset vehicle weight in the simulation algorithm module. In addition, it is also necessary to satisfy that the speed drop collected by the vehicle status information collection module within a 2s time interval is greater than or equal to the preset speed drop in the simulation algorithm module.

[0028] The above are only preferred embodiments of the present invention. Any person skilled in the art may modify the present invention by using the above technical solutions or modify it into an equivalent technical solution. Therefore, any simple modification or equivalent replacement made according to the technical solution of the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A tire blowout warning system for a motor vehicle, characterized in that: The system comprises: A vehicle status information collection module, which is used to collect the vehicle's speed, weight, and number of braking times, and upload the collected data to the cloud; A simulation algorithm module, wherein the simulation algorithm module performs calculations based on the data collected by the vehicle status information acquisition module and establishes a wheel-end temperature simulation model according to vehicle parameters, and issues or releases a warning signal according to a comparison result between a temperature calculation value within a set time period and a set temperature threshold; the wheel-end temperature simulation model includes a heating process and a cooling process; An engine control module, used to respond to the signal action of the algorithm simulation module to control the vehicle speed; A display module is used to display a warning to the driver.

2. A motor vehicle tire blowout warning system according to claim 1, characterized in that: The vehicle parameters include the volume, material, heat capacity of the brake, the braking torque, load, number of braking times, vehicle speed, and speed reduction of a single braking.

3. A motor vehicle tire blowout warning system according to claim 2, characterized in that: The temperature growth model of the axle wheel end temperature simulation model during the heating process is: ； ； In the formula, J The energy generated by braking, m Indicates vehicle weight. V s Indicates the initial braking speed. V d Indicates the braking end speed. h s Indicates the initial elevation of braking. h d Indicates the elevation at which braking ends; g represents the acceleration due to gravity; △ T i Indicates the temperature increase of a single brake; t z Indicates braking time; m i Indicates the quality of the brake, C p Indicates the thermal capacity of the brake.

4. A tire blowout warning system for a motor vehicle according to claim 3, characterized in that: Final temperature of the axle wheel end heating process T i for: ； In the formula, T Outside indicates the outdoor temperature.

5. A tire blowout warning system for a motor vehicle according to claim 4, characterized in that: The temperature cooling model of the axle wheel end cooling process is: ； In the formula, Indicates that the axle is in a non-braking period Cooling temperature of the inner wheel end brake; Indicates the brake friction surface area; represents the empirical coefficient; Indicates the running time of the vehicle speed greater than 8km / h before the next braking; Indicates the final temperature of the axle wheel end during the previous braking.

6. A tire blowout warning system for a motor vehicle according to claim 5, characterized in that: Calculated temperature value within the set period T 1 is: 。 7. A motor vehicle tire blowout warning method according to the system of claim 6, characterized in that: The following steps are involved: S1) Collect the data required by the simulation algorithm module when the vehicle is running in real time, and input it into the simulation algorithm module to calculate the real-time temperature of the wheel end of the axle T 1; S2) setting a number of set temperature thresholds corresponding to the vehicle speed interval according to the vehicle speed interval; calculating the temperature value of the wheel end of the axle within the set period T 1 matches the current vehicle speed range; S3) Comparison T 1 and the set temperature threshold of its speed range, when T 1 When the temperature exceeds the set threshold, the display module will display a warning and prompt the driver to reduce the speed to the recommended speed. V 0, until the real-time temperature T 1 When the temperature is less than or equal to the threshold, the warning is lifted; If you set the duration T s Failure to reduce speed to recommended speed V 0, the simulation algorithm module sends a speed limit request to the engine to reduce the vehicle speed until the real-time temperature T 1 is less than the set temperature threshold corresponding to the vehicle speed range.

8. A motor vehicle tire blowout warning method according to claim 7, characterized in that: The condition for issuing the warning in step S3) must be met: the vehicle weight collected by the vehicle status information collection module is greater than the preset vehicle weight in the simulation algorithm module.

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