Brake control method and control system based on air brake

Abstract

The invention discloses a brake control method and system based on an air brake. The brake control method comprises the steps that S1, real-time working condition information of a vehicle is obtained; s2, target braking force is calculated according to the real-time working condition information, and an airflow adjusting instruction is generated based on the target braking force; s3, according to the airflow adjusting instruction, a proportional valve set is controlled to adjust the opening degree of an airflow channel, and the flow of airflow is regulated and controlled; s4, according to the real-time working condition information of the vehicle, a brake control mode most suitable for the current working condition is automatically selected and switched to, and the brake control mode comprises a normal mode, a load shedding mode and a ramp mode; s5, the braking effect is detected in real time through a braking system sensor of the vehicle, and the airflow adjusting instruction is adjusted according to the braking effect; and S6, after the set braking target is achieved, airflow adjustment is stopped, and the initial running state of the vehicle is restored. The method has the advantages of high precision, high adaptability and hardware configuration simplification.

Description

Technical Field

[0001] The present invention relates to the technical field of brake control, and in particular to a brake control method and control system based on air brakes. Background Art

[0002] With the development of the automotive industry, the performance of the braking system, a key component of vehicle safety, is crucial. Traditional air brake systems present several challenges in practical applications, particularly under conditions such as load variations, slope fluctuations, and vehicle speed fluctuations. The instability of braking performance and the lack of control accuracy present urgent technical challenges. To ensure that the braking system can provide stable braking force under various operating conditions, existing technologies often employ methods based on mechanical adjustment and preset control strategies. However, these methods often fail to meet the high demands for accuracy, adaptability, and efficiency in modern traffic environments.

[0003] In the existing technology, traditional air brake systems mostly rely on fixed braking force settings and relatively simplified control modes. Specifically, traditional air brake systems have obvious shortcomings in the following aspects:

[0004] 1. Poor Braking Adaptability: Traditional air brake systems often rely on fixed control modes and lack the ability to dynamically adapt to load changes, slope fluctuations, and vehicle speed fluctuations. This results in imprecise braking force adjustment in different driving environments, affecting braking effectiveness.

[0005] 2. Inefficient control accuracy: Existing air brake systems are mostly controlled through preset thresholds and proportional adjustments, and most lack real-time feedback and dynamic adjustment mechanisms. Traditional systems struggle to accurately adjust braking force in response to complex operating conditions, resulting in delayed braking response and impacting vehicle safety.

[0006] 3. Complex hardware configuration: Many traditional air brake systems use multiple electronic control units and complex hardware configurations, which not only increases system costs, but also increases maintenance complexity and system failure rate.

[0007] 4. Lack of real-time feedback and adjustment mechanism: Traditional systems fail to effectively integrate sensor feedback and brake effect correction during the braking process, resulting in limited braking force accuracy. Especially in dynamic road conditions or emergency conditions, the adjustment of the braking effect is often delayed.

[0008] Therefore, how to provide a brake control method and control system based on air brake is a problem that those skilled in the art need to solve urgently. Summary of the Invention

[0009] One objective of the present invention is to provide a multi-mode adaptive air brake control method and control system based on flow regulation. This method dynamically calculates the target braking force and generates corresponding airflow adjustment instructions by real-time monitoring of vehicle load, slope, and speed. A proportional valve assembly is then used to adjust the opening of the airflow channel to achieve precise braking force control. Furthermore, the system features automatic braking mode switching, adaptively adjusting braking strategies under different operating conditions. This system offers the advantages of high precision, adaptability, and simplified hardware configuration.

[0010] A brake control method based on air brake according to an embodiment of the present invention includes the following steps:

[0011] S1. Acquiring real-time operating condition information of the vehicle, wherein the real-time operating condition information includes the vehicle's load, slope, and speed;

[0012] S2. Calculating a target braking force according to the real-time operating condition information, and generating an airflow adjustment instruction based on the target braking force;

[0013] S3. According to the airflow adjustment instruction, the proportional valve group is controlled to adjust the opening of the airflow channel to regulate the flow rate of the airflow;

[0014] S4. Automatically select and switch to a brake control mode that best suits the current operating condition based on the real-time operating condition information of the vehicle, wherein the brake control mode includes a normal mode, a load reduction mode, and a ramp mode;

[0015] S5. Detecting the braking effect in real time through a braking system sensor of the vehicle, and adjusting the airflow adjustment instruction according to the braking effect;

[0016] S6. After reaching the set braking target, stop airflow adjustment and return to the initial operating state of the vehicle.

[0017] Optionally, the S2 specifically includes:

[0018] S21: Determine the vehicle's load, slope, and speed based on the real-time operating condition information and calculate the target braking force F. target :

[0019] F target =k1·Load+k2·Slope+k3·Speed

[0020] Among them, k1, k2, and k3 are coefficients preset according to the characteristics of the vehicle and the braking system, and Load, Slope, and Speed are the vehicle's load, slope, and speed, respectively;

[0021] S22, according to the target braking force F target , calculate the required air flow Q flow , to achieve the target braking force adjustment:

[0022]

[0023] Among them, C brake is the airflow conversion coefficient of the vehicle's brake system;

[0024] S23, according to the flow rate Q of the air flow flow , generate corresponding airflow adjustment instructions.

[0025] Optionally, the S3 specifically includes:

[0026] S31. According to the airflow adjustment instruction, the proportional valve group is controlled to adjust the opening θ of the airflow channel and the flow rate of the airflow:

[0027] θ=k4·Q flow

[0028] Among them, θ is the opening of the proportional valve group, k4 is the opening adjustment coefficient of the proportional valve group, which represents the linear relationship between the proportional valve opening and the air flow rate, Q flow is the required air flow rate;

[0029] S32. Based on the actual characteristics of the proportional valve group, the opening of the proportional valve group is adjusted in real time through a feedback mechanism so that the flow rate of the regulated airflow is consistent with the target braking force;

[0030] S33. During the adjustment process of the proportional valve group, continuously monitor the flow rate change of the airflow in the airflow channel, detect the flow rate deviation of the airflow in real time, and adjust the opening of the proportional valve group according to the flow rate deviation of the airflow;

[0031] S34, when the brake system works in different modes, dynamically adjust the opening adjustment coefficient k4 of the proportional valve group according to the requirements of different modes;

[0032] S35. During the braking process, the opening of the proportional valve group is corrected in real time based on the feedback information of the actual braking force, so that the flow rate of the airflow always matches the target braking force.

[0033] Optionally, the S4 specifically includes:

[0034] S41, according to the real-time working condition information of the vehicle, obtain the vehicle load, slope and speed, and calculate the mode selection index I mode , this index reflects the priority of selecting braking mode under different working conditions:

[0035]

[0036] Among them, I modeis the mode selection index, α is the influence coefficient of load on mode selection, β is the influence coefficient of slope on mode selection, γ is the influence coefficient of vehicle speed on mode selection, δ is the comprehensive influence coefficient of load, slope and speed, which represents the influence of the interaction between the three, η is the constant coefficient, which represents the reference value of mode selection, μ is the adjustment coefficient, which represents the nonlinear influence of working condition change, Load, Slope and Speed represent the load, slope and speed of the vehicle respectively;

[0037] S42, select index I according to the calculated mode mode , compare the mode selection index with the preset threshold [0,1] and select the brake control mode that best suits the current working condition. If the mode selection index I mode If the value is higher than the preset threshold value of 0.7, the ramp mode is selected. If the mode selection index is I mode is equal to the preset threshold [0.5,0.7], then the normal mode is selected. If the mode selection index I mode If it is lower than the preset threshold of 0.5, the load shedding mode is selected;

[0038] S43. After selecting the appropriate brake control mode, adjust the operating parameters of the brake system according to the selected mode. If the ramp mode is selected, increase the braking force and adjust the opening of the proportional valve group according to the slope. If the load reduction mode is selected, reduce the braking force and reduce the air flow according to the vehicle load. In the normal mode, maintain the standard brake control strategy.

[0039] S44. In the selected brake control mode, the real-time working condition information of the vehicle is continuously monitored, and the working state of the brake system is adjusted according to the changes in the real-time working condition information. Whenever the real-time working condition information changes significantly, the mode selection index I is automatically updated. mode And switch to the new brake control mode;

[0040] S45. When the brake system is in different modes, adjust the opening of the proportional valve group, the flow rate of the air flow, and the braking force.

[0041] Optionally, the S5 specifically includes:

[0042] S51, detecting the braking effect of the vehicle in real time through a brake system sensor;

[0043] S52. Calculate a braking effect error ∈brake based on the real-time detected braking effect. The braking effect error ∈brake is the difference between the target braking force and the actual braking force:

[0044] ∈ brake =F target -F actual

[0045] Among them, ∈brake is the braking effect error, F target is the target braking force, F actual is the actual braking force;

[0046] S53, adjusting the airflow adjustment instruction Q according to the braking effect error ∈brake adj , so that the required airflow rate matches the target braking force:

[0047]

[0048] Among them, Q adj is the adjusted airflow control instruction, k5 is the correction coefficient, which indicates the influence of the braking effect error on the airflow control, C brake is the airflow conversion coefficient of the vehicle's brake system;

[0049] S54. After adjusting the airflow control command, the airflow rate is readjusted through the proportional valve group, and the change in braking effect is monitored in real time. If the braking effect error still does not reach the set allowable range, the airflow control command is further adjusted until the actual braking force is consistent with the target braking force;

[0050] S55. When the braking effect error changes significantly, recalculate the braking effect error and make corresponding corrections to the airflow adjustment instruction.

[0051] Optionally, the S6 specifically includes:

[0052] S61: After reaching the set braking target, monitor the state of the braking system and detect the target braking force F. target Has the target braking force F been reached? goal , if F target Equal to or close to the predetermined target braking force F goal , then stop the air flow adjustment operation:

[0053] |F target -F goal |<∈

[0054] Among them, F goal is the set target braking force, ∈ is the error tolerance range, which represents the allowable deviation between the target braking force and the predetermined target braking force;

[0055] S62. After stopping the air flow adjustment, gradually close the opening of the proportional valve group θ:

[0056] θ new =θ current -k6·(F target -F goal )

[0057] Among them, θnew is the proportional valve opening after adjustment, θ current is the current proportional valve opening, k6 is the closing coefficient, which indicates the rate of proportional valve opening adjustment;

[0058] S63. After the proportional valve group is completely closed, the airflow system is restored to the initial operating state of the vehicle, so that the airflow is completely stopped and the brake system is in standby mode;

[0059] S64. After the braking target is achieved, continuously monitor the real-time status of the vehicle. If a change in external factors is detected, recalculate the braking force requirement and adjust the operating status of the braking system accordingly.

[0060] S65. After returning to the initial operating state, if the braking effect meets the set standard, the normal driving state of the vehicle is maintained; otherwise, the braking control is re-performed according to the real-time operating condition information.

[0061] A control system based on air brake, comprising:

[0062] Load detection unit, used to monitor the vehicle load in real time and output corresponding load signals;

[0063] A slope detection unit is used to monitor the slope of the road where the vehicle is located in real time and output a corresponding slope signal;

[0064] The vehicle speed detection unit is used to monitor the current speed of the vehicle in real time and output a corresponding speed signal;

[0065] a control unit, configured to receive a load signal, a slope signal, and a vehicle speed signal, and calculate a target braking force based on these signals to generate an airflow adjustment instruction;

[0066] A proportional valve group is used to receive airflow adjustment instructions and adjust the opening of the airflow channel to control the airflow volume and thus adjust the braking force;

[0067] A braking effect detection unit is used to detect the braking effect in real time, generate a braking force feedback signal, and feed the braking force feedback signal back to the control unit;

[0068] a brake effect correction unit, configured to receive a brake force feedback signal, calculate a brake effect error, and adjust the airflow adjustment instruction according to the error;

[0069] The monitoring unit is used to monitor the achievement of the braking target. When the braking target is achieved, the air flow adjustment is stopped and the initial operating state is restored.

[0070] The beneficial effects of the present invention are:

[0071] (1) By combining real-time operating condition information monitoring, a flow regulation mechanism, and multi-mode adaptive control technology, the present invention enables the braking system to precisely adjust the braking force based on multiple operating conditions, such as vehicle load, slope, and speed, thereby ensuring stable and high-precision braking under different driving conditions. By regulating the airflow through a proportional valve group to control the braking force, the problems of braking instability and delayed response in traditional air brake systems are avoided, thereby improving the performance and reliability of the braking system.

[0072] (2) By monitoring the vehicle's braking effect in real time and dynamically adjusting the airflow control instructions, the present invention achieves precise matching of braking force with target braking force, ensuring that the braking system can provide sufficient braking force under all circumstances. In particular, in environments with large variations in load and slope, the system can automatically switch to the most appropriate braking mode, further improving braking accuracy and adaptability.

[0073] (3) By simplifying the hardware configuration and relying on flow regulation and simple sensor feedback mechanisms, the present invention reduces the number of electronic control units and complex hardware required for traditional air brake systems, thereby improving the system's economy and ease of maintenance. At the same time, relying on multi-mode automatic switching control and real-time feedback correction mechanisms, the control system has greater adaptability, flexibility, and efficiency, especially in complex and changing road environments, and can effectively cope with various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0075] Figure 1 This is a flow chart of a brake control method based on air brake proposed by the present invention. DETAILED DESCRIPTION

[0076] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0077] refer to Figure 1 , a brake control method based on air brake, comprising the following steps:

[0078] S1. Acquiring real-time operating condition information of the vehicle, wherein the real-time operating condition information includes the vehicle's load, slope, and speed;

[0079] This implementation provides comprehensive, accurate, and real-time data support for the brake control system by acquiring real-time information about the vehicle's load, slope, and speed. This data helps the system accurately calculate the target braking force based on the current operating conditions and dynamically adjust the braking force, thus avoiding the poor adaptability and delayed response of traditional brake systems in complex environments.

[0080] S2. Calculating a target braking force according to the real-time operating condition information, and generating an airflow adjustment instruction based on the target braking force;

[0081] In this embodiment, S2 specifically includes:

[0082] S21: Determine the vehicle's load, slope, and speed based on the real-time operating condition information and calculate the target braking force F. target :

[0083] F target =k1·Load+k2·Slope+k3·Speed

[0084] Among them, k1, k2, and k3 are coefficients preset according to the characteristics of the vehicle and the braking system, and Load, Slope, and Speed are the vehicle's load, slope, and speed, respectively;

[0085] S22, according to the target braking force F target , calculate the required air flow Q flow , to achieve the target braking force adjustment:

[0086]

[0087] Among them, C brake is the airflow conversion coefficient of the vehicle's brake system;

[0088] S23, according to the flow rate Q of the air flow flow , generate corresponding airflow adjustment instructions.

[0089] This implementation accurately calculates the target braking force by acquiring and processing real-time operating condition information, and generates airflow adjustment commands based on this information. This method dynamically adjusts braking force based on variables such as load, slope, and vehicle speed, avoiding the lack of adaptability to complex operating conditions found in traditional air brake systems.

[0090] S3. According to the airflow adjustment instruction, the proportional valve group is controlled to adjust the opening of the airflow channel to regulate the flow rate of the airflow;

[0091] In this embodiment, S3 specifically includes:

[0092] S31. According to the airflow adjustment instruction, the proportional valve group is controlled to adjust the opening θ of the airflow channel and the flow rate of the airflow:

[0093] θ=k4·Q flow

[0094] Among them, θ is the opening of the proportional valve group, k4 is the opening adjustment coefficient of the proportional valve group, which represents the linear relationship between the proportional valve opening and the air flow rate, Q flow is the required air flow rate;

[0095] S32. Based on the actual characteristics of the proportional valve group, the opening of the proportional valve group is adjusted in real time through a feedback mechanism so that the flow rate of the regulated airflow is consistent with the target braking force;

[0096] S33. During the adjustment process of the proportional valve group, continuously monitor the flow rate change of the airflow in the airflow channel, detect the flow rate deviation of the airflow in real time, and adjust the opening of the proportional valve group according to the flow rate deviation of the airflow;

[0097] S34, when the brake system works in different modes, dynamically adjust the opening adjustment coefficient k4 of the proportional valve group according to the requirements of different modes;

[0098] S35. During the braking process, the opening of the proportional valve group is corrected in real time based on the feedback information of the actual braking force, so that the flow rate of the airflow always matches the target braking force.

[0099] This embodiment precisely regulates the airflow rate by controlling the proportional valve assembly to adjust the opening of the airflow channel according to airflow control instructions. Compared to the extensive control methods of traditional systems, this invention effectively improves braking response speed and stability through precise adjustment of the proportional valve, avoiding insufficient or excessive braking force, thereby improving vehicle safety and the adaptability of the braking system.

[0100] S4. Automatically select and switch to a brake control mode that best suits the current operating condition based on the real-time operating condition information of the vehicle, wherein the brake control mode includes a normal mode, a load reduction mode, and a ramp mode;

[0101] In this embodiment, S4 specifically includes:

[0102] S41, according to the real-time working condition information of the vehicle, obtain the vehicle load, slope and speed, and calculate the mode selection index I mode , this index reflects the priority of selecting braking mode under different working conditions:

[0103]

[0104] Among them, I modeis the mode selection index, α is the influence coefficient of load on mode selection, β is the influence coefficient of slope on mode selection, γ is the influence coefficient of vehicle speed on mode selection, δ is the comprehensive influence coefficient of load, slope and speed, which represents the influence of the interaction between the three, η is the constant coefficient, which represents the reference value of mode selection, μ is the adjustment coefficient, which represents the nonlinear influence of working condition change, Load, Slope and Speed represent the load, slope and speed of the vehicle respectively;

[0105] S42, select index I according to the calculated mode mode , compare the mode selection index with the preset threshold [0,1] and select the brake control mode that best suits the current working condition. If the mode selection index I mode If the value is higher than the preset threshold value of 0.7, the ramp mode is selected. If the mode selection index is I mode is equal to the preset threshold [0.5,0.7], then the normal mode is selected. If the mode selection index I mode If it is lower than the preset threshold of 0.5, the load shedding mode is selected;

[0106] S43. After selecting the appropriate brake control mode, adjust the operating parameters of the brake system according to the selected mode. If the ramp mode is selected, increase the braking force and adjust the opening of the proportional valve group according to the slope. If the load reduction mode is selected, reduce the braking force and reduce the air flow according to the vehicle load. In the normal mode, maintain the standard brake control strategy.

[0107] S44. In the selected brake control mode, the real-time working condition information of the vehicle is continuously monitored, and the working state of the brake system is adjusted according to the changes in the real-time working condition information. Whenever the real-time working condition information changes significantly, the mode selection index I is automatically updated. mode And switch to the new brake control mode;

[0108] S45. When the brake system is in different modes, adjust the opening of the proportional valve group, the flow rate of the air flow, and the braking force.

[0109] This implementation automatically selects and switches to the brake control mode most appropriate for the current operating conditions based on real-time operating information, ensuring the brake system provides optimal braking force control in various driving environments. By intelligently switching between normal, unloaded, and ramp modes, this invention effectively enhances the adaptability and flexibility of the brake system, avoiding the instability of traditional air brake systems under varying loads, slope fluctuations, or vehicle speed fluctuations, significantly improving the precision and safety of brake control.

[0110] S5. Detecting the braking effect in real time through a braking system sensor of the vehicle, and adjusting the airflow adjustment instruction according to the braking effect;

[0111] In this embodiment, S5 specifically includes:

[0112] S51, detecting the braking effect of the vehicle in real time through a brake system sensor;

[0113] S52. Calculate a braking effect error ∈brake based on the real-time detected braking effect. The braking effect error ∈brake is the difference between the target braking force and the actual braking force:

[0114] ∈ brake =F target -F actual

[0115] Among them, ∈brake is the braking effect error, F target is the target braking force, F actual is the actual braking force;

[0116] S53, adjusting the airflow adjustment instruction Q according to the braking effect error ∈brake adj , so that the required airflow rate matches the target braking force:

[0117]

[0118] Among them, Q adj is the adjusted airflow control instruction, k5 is the correction coefficient, which indicates the influence of the braking effect error on the airflow control, C brake is the airflow conversion coefficient of the vehicle's braking system;

[0119] S54. After adjusting the airflow control command, the airflow rate is readjusted through the proportional valve group, and the change in braking effect is monitored in real time. If the braking effect error still does not reach the set allowable range, the airflow control command is further adjusted until the actual braking force is consistent with the target braking force;

[0120] S55. When the braking effect error changes significantly, recalculate the braking effect error and make corresponding corrections to the airflow adjustment instruction.

[0121] This implementation uses brake system sensors to monitor braking effect in real time and adjusts airflow control commands based on this information, achieving precise control of braking force. This method dynamically monitors braking effect and adjusts airflow control commands in real time to ensure precise matching of braking force to target braking force.

[0122] S6. After reaching the set braking target, stop airflow adjustment and return to the initial operating state of the vehicle.

[0123] In this embodiment, S6 specifically includes:

[0124] S61: After reaching the set braking target, monitor the state of the braking system and detect the target braking force F. target Has the target braking force F been reached? goal , if F target Equal to or close to the predetermined target braking force F goal , then stop the air flow adjustment operation:

[0125] |F target -F goal |<∈

[0126] Among them, F goal is the set target braking force, ∈ is the error tolerance range, which represents the allowable deviation between the target braking force and the predetermined target braking force;

[0127] S62. After stopping the air flow adjustment, gradually close the opening of the proportional valve group θ:

[0128] θ new =θ current -k6·(F target -F goal )

[0129] Among them, θ new is the proportional valve opening after adjustment, θ current is the current proportional valve opening, k6 is the closing coefficient, which indicates the rate of proportional valve opening adjustment;

[0130] S63. After the proportional valve group is completely closed, the airflow system is restored to the initial operating state of the vehicle, so that the airflow is completely stopped and the brake system is in standby mode;

[0131] S64. After the braking target is achieved, continuously monitor the real-time status of the vehicle. If a change in external factors is detected, recalculate the braking force requirement and adjust the operating status of the braking system accordingly.

[0132] S65. After returning to the initial operating state, if the braking effect meets the set standard, the normal driving state of the vehicle is maintained; otherwise, the braking control is re-performed according to the real-time operating condition information.

[0133] This implementation ensures precise termination of the braking process by stopping airflow adjustment and returning the vehicle to its initial operating state after reaching the set braking target. This method effectively avoids excessive braking and unnecessary energy consumption, and ensures that the brake system quickly returns to normal operation after each braking operation.

[0134] A control system based on air brake, comprising:

[0135] Load detection unit, used to monitor the vehicle load in real time and output corresponding load signals;

[0136] A slope detection unit is used to monitor the slope of the road where the vehicle is located in real time and output a corresponding slope signal;

[0137] The vehicle speed detection unit is used to monitor the current speed of the vehicle in real time and output a corresponding speed signal;

[0138] a control unit, configured to receive a load signal, a slope signal, and a vehicle speed signal, and calculate a target braking force based on these signals to generate an airflow adjustment instruction;

[0139] A proportional valve group is used to receive airflow adjustment instructions and adjust the opening of the airflow channel to control the airflow volume and thus adjust the braking force;

[0140] A braking effect detection unit is used to detect the braking effect in real time, generate a braking force feedback signal, and feed the braking force feedback signal back to the control unit;

[0141] a brake effect correction unit, configured to receive a brake force feedback signal, calculate a brake effect error, and adjust the airflow adjustment instruction according to the error;

[0142] The monitoring unit is used to monitor the achievement of the braking target. When the braking target is achieved, the air flow adjustment is stopped and the initial operating state is restored.

[0143] This implementation integrates multiple functional units, including load detection, slope detection, vehicle speed detection, braking effect monitoring, and braking effect correction, to provide a highly accurate and adaptable air brake-based control system. This system monitors various vehicle operating conditions in real time and accurately adjusts braking force based on this data, ensuring that braking effect remains consistent with the target braking force.

[0144] Example:

[0145] In order to verify the effectiveness of the present invention, the present invention was applied to the brake control system of a typical medium-sized logistics and transportation company. The company is mainly engaged in long-distance freight transportation business. The fleet is large and the driving routes cover a variety of different road conditions, including mountainous areas, urban roads and flat highways. Since vehicles travel frequently and for long periods of time, the stability and safety of the brake system are crucial to ensuring the safety of drivers and cargo. Recently, the company found that the traditional air brake system had unstable braking effect and slow braking force regulation response when facing different loads, slope changes and speed fluctuations, resulting in multiple minor brake failure incidents. Although no serious consequences were caused, it has attracted the attention of management.

[0146] In order to solve this problem, the logistics company decided to deploy the air brake-based brake control method and control system of the present invention to comprehensively improve the accuracy and adaptability of brake control. The system first monitors the vehicle's load, slope and speed information in real time through the load detection unit, slope detection unit and speed detection unit. This information is transmitted to the control unit, which calculates the target braking force based on the real-time working condition data and generates corresponding airflow adjustment instructions. The proportional valve group adjusts the opening of the airflow channel according to these instructions to accurately control the braking force. In addition, the system also monitors the braking effect in real time through the brake effect detection unit, and adjusts the airflow adjustment instructions according to the error between the actual braking force and the target braking force to ensure the stability and accuracy of the braking effect.

[0147] During implementation, the system was run on a typical route used by the company: a highway transport route from Shanghai to Hangzhou. Vehicle loads on this route typically range from 20 to 35 tons, with significant gradients and speeds varying from high-speed to slow urban traffic. The air brake control system of the present invention dynamically switches braking modes based on real-time monitoring data, increasing braking force in ramp mode, automatically reducing braking force in load reduction mode, and maintaining standard braking control strategies in normal mode.

[0148] To evaluate the effectiveness of the system, the company collected data by monitoring the braking system performance before and after deployment over the past three months. The specific data is shown in the following table:

[0149] Table 1: Logistics company's brake system performance improvement report

[0150]

[0151] As shown in the table above, after deploying the system, the company's number of brake failure incidents decreased significantly, from 12 per month to just one, demonstrating that the system provides more stable braking force under varying loads and operating conditions. Automated brake force regulation also significantly reduces the number of brake adjustments required, reducing the need for manual intervention. System response time has been shortened from 15 seconds to 3 seconds, significantly improving braking response, especially for emergency braking in complex road conditions. Braking force control accuracy has also been significantly improved, from ±8% to ±2%, significantly enhancing the stability and reliability of brake control. The system's zero failure rate further validates the technology's high reliability.

[0152] These data demonstrate that the air brake control method and control system of the present invention can effectively improve the adaptability of the brake system under complex and dynamic operating conditions, ensuring precise adjustment of braking force and responsiveness, thereby significantly enhancing safety and efficiency during transportation. Successful deployment at this logistics company demonstrates the feasibility and superiority of the present invention in practical applications, particularly in improving braking performance under varying load, slope, and vehicle speed conditions.

[0153] By combining real-time operating condition information with intelligent brake mode switching technology, the present invention enables the air brake system to better adapt to various complex operating conditions, improve the accuracy and stability of the braking force, reduce the failure rate of the brake system, ensure safety during transportation, and have good economy and efficiency.

[0154] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A brake control method based on air brake, characterized in that: The steps include: S1. Acquiring real-time operating condition information of the vehicle, wherein the real-time operating condition information includes the vehicle's load, slope, and speed; S2. Calculating a target braking force according to the real-time operating condition information, and generating an airflow adjustment instruction based on the target braking force; S3. According to the airflow adjustment instruction, the proportional valve group is controlled to adjust the opening of the airflow channel to regulate the flow rate of the airflow; S4. Automatically select and switch to a brake control mode that best suits the current operating condition based on the real-time operating condition information of the vehicle, wherein the brake control mode includes a normal mode, a load reduction mode, and a ramp mode; S5. Detecting the braking effect in real time through a braking system sensor of the vehicle, and adjusting the airflow adjustment instruction according to the braking effect; S6. After reaching the set braking target, stop airflow adjustment and return to the initial operating state of the vehicle.

2. The air brake-based brake control method according to claim 1, characterized in that: The S2 specifically includes: S21: Determine the vehicle's load, slope, and speed based on the real-time operating condition information and calculate the target braking force F. target : F target =k1·Load+k2·Slope+k3·Speed Among them, k1, k2, and k3 are coefficients preset according to the characteristics of the vehicle and the braking system, and Load, Slope, and Speed are the vehicle's load, slope, and speed, respectively; S22, according to the target braking force F target , calculate the required air flow Q flow , to achieve the target braking force adjustment: Among them, C brake is the airflow conversion coefficient of the vehicle's braking system; S23, according to the flow rate Q of the air flow flow , generate corresponding airflow adjustment instructions.

3. The air brake-based brake control method according to claim 2, characterized in that: The S3 specifically includes: S31. According to the airflow adjustment instruction, the proportional valve group is controlled to adjust the opening θ of the airflow channel and the flow rate of the airflow: θ=k4·Q flow Among them, θ is the opening of the proportional valve group, k4 is the opening adjustment coefficient of the proportional valve group, which represents the linear relationship between the proportional valve opening and the air flow rate, Q flow is the required air flow rate; S32. Based on the actual characteristics of the proportional valve group, the opening of the proportional valve group is adjusted in real time through a feedback mechanism so that the flow rate of the regulated airflow is consistent with the target braking force; S33. During the adjustment process of the proportional valve group, continuously monitor the flow rate change of the airflow in the airflow channel, detect the flow rate deviation of the airflow in real time, and adjust the opening of the proportional valve group according to the flow rate deviation of the airflow; S34, when the brake system works in different modes, dynamically adjust the opening adjustment coefficient k4 of the proportional valve group according to the requirements of different modes; S35. During the braking process, the opening of the proportional valve group is corrected in real time based on the feedback information of the actual braking force, so that the flow rate of the airflow always matches the target braking force.

4. The air brake-based brake control method according to claim 2, characterized in that: The S4 specifically includes: S41, according to the real-time working condition information of the vehicle, obtain the vehicle load, slope and speed, and calculate the mode selection index I mode , this index reflects the priority of selecting braking mode under different working conditions: Among them, I mode is the mode selection index, α is the influence coefficient of load on mode selection, β is the influence coefficient of slope on mode selection, γ is the influence coefficient of vehicle speed on mode selection, δ is the comprehensive influence coefficient of load, slope and speed, which represents the influence of the interaction between the three, η is the constant coefficient, which represents the reference value of mode selection, μ is the adjustment coefficient, which represents the nonlinear influence of working condition change, Load, Slope and Speed represent the load, slope and speed of the vehicle respectively; S42, select index I according to the calculated mode mode , compare the mode selection index with the preset threshold [0,1] and select the brake control mode that best suits the current working condition. If the mode selection index I mode If the value is higher than the preset threshold value of 0.7, the ramp mode is selected. If the mode selection index is I mode is equal to the preset threshold [0.5,0.7], then the normal mode is selected. If the mode selection index I mode If it is lower than the preset threshold of 0.5, the load shedding mode is selected; S43. After selecting the appropriate brake control mode, adjust the operating parameters of the brake system according to the selected mode. If the ramp mode is selected, increase the braking force and adjust the opening of the proportional valve group according to the slope. If the load reduction mode is selected, reduce the braking force and reduce the air flow according to the vehicle load. In the normal mode, maintain the standard brake control strategy. S44. In the selected brake control mode, the real-time working condition information of the vehicle is continuously monitored, and the working state of the brake system is adjusted according to the changes in the real-time working condition information. Whenever the real-time working condition information changes significantly, the mode selection index I is automatically updated. mode And switch to the new brake control mode; S45. When the brake system is in different modes, adjust the opening of the proportional valve group, the flow rate of the air flow, and the braking force.

5. The air brake-based brake control method according to claim 2, characterized in that: The S5 specifically includes: S51, detecting the braking effect of the vehicle in real time through a brake system sensor; S52, according to the real-time detection of the braking effect, calculate the braking effect error ∈ brake , the braking effect error ∈ brake is the difference between the target braking force and the actual braking force: ∈ brake =F target -F actual Among them, ∈ brake is the braking effect error, F target is the target braking force, F actual is the actual braking force; S53, according to the braking effect error ∈ brake , adjust the air flow control instruction Q adj , so that the required airflow rate matches the target braking force: Among them, Q adj is the adjusted airflow control instruction, k5 is the correction coefficient, which indicates the influence of the braking effect error on the airflow control, C brake is the airflow conversion coefficient of the vehicle's brake system; S54. After adjusting the airflow control command, the airflow rate is readjusted through the proportional valve group, and the change in braking effect is monitored in real time. If the braking effect error still does not reach the set allowable range, the airflow control command is further adjusted until the actual braking force is consistent with the target braking force; S55. When the braking effect error changes significantly, recalculate the braking effect error and make corresponding corrections to the airflow adjustment instruction.

6. The air brake-based brake control method according to claim 2, characterized in that: The S6 specifically includes: S61: After reaching the set braking target, monitor the state of the braking system and detect the target braking force F. target Has the target braking force F been reached? goal , if F target Equal to or close to the predetermined target braking force F goal , then stop the air flow adjustment operation: |F target -F goal |<∈ Among them, F goal is the set target braking force, ∈ is the error tolerance range, which represents the allowable deviation between the target braking force and the predetermined target braking force; S62. After stopping the air flow adjustment, gradually close the opening of the proportional valve group θ: θ new =θ current -k6·(F target -F goal ) Among them, θ new is the proportional valve opening after adjustment, θ current is the current proportional valve opening, k6 is the closing coefficient, which indicates the rate of proportional valve opening adjustment; S63. After the proportional valve group is completely closed, the airflow system is restored to the initial operating state of the vehicle, so that the airflow is completely stopped and the brake system is in standby mode; S64. After the braking target is achieved, continuously monitor the real-time status of the vehicle. If a change in external factors is detected, recalculate the braking force requirement and adjust the operating status of the braking system accordingly. S65. After returning to the initial operating state, if the braking effect meets the set standard, the normal driving state of the vehicle is maintained; otherwise, the braking control is re-performed according to the real-time operating condition information.

7. A control system based on air brake, applied to a brake control method based on air brake according to any one of claims 1 to 6, characterized in that: include: Load detection unit, used to monitor the vehicle load in real time and output corresponding load signals; A slope detection unit is used to monitor the slope of the road where the vehicle is located in real time and output a corresponding slope signal; The vehicle speed detection unit is used to monitor the current speed of the vehicle in real time and output a corresponding speed signal; a control unit, configured to receive a load signal, a slope signal, and a vehicle speed signal, and calculate a target braking force based on these signals to generate an airflow adjustment instruction; A proportional valve group is used to receive airflow adjustment instructions and adjust the opening of the airflow channel to control the airflow volume and thus adjust the braking force; A braking effect detection unit is used to detect the braking effect in real time, generate a braking force feedback signal, and feed the braking force feedback signal back to the control unit; a brake effect correction unit, configured to receive a brake force feedback signal, calculate a brake effect error, and adjust the airflow adjustment instruction according to the error; The monitoring unit is used to monitor the achievement of the braking target. When the braking target is achieved, the air flow adjustment is stopped and the initial operating state is restored.

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