Vehicle brake control method, device and equipment based on air pressure of vehicle air tank and medium

Abstract

The invention discloses a vehicle braking control method, device, equipment and medium based on the air pressure of a vehicle air tank, and relates to the technical field of vehicle control. The method comprises the steps that the battery charge state and the air tank pressure value of a vehicle are obtained, an air inflation starting air pressure threshold value is set according to the battery charge state, and when the air tank pressure value is lower than the air inflation starting air pressure threshold value, the air inflation starting air pressure threshold value is started; the brake inverter is driven to work to drive the inflation pump to inflate the air tank, and when it is detected that the air tank leaks air or the inflation pump is abnormal or the pressure value of the air tank is continuously lower than the inflation starting air pressure threshold value, vehicle running is limited, and alarm is triggered. The inflation starting air pressure threshold value is set by monitoring the state of charge of the battery, the brake inverter is used for driving the inflation pump to inflate, vehicle running is limited and an alarm is given when abnormity is detected, the energy utilization rate of the vehicle is increased, running safety and reliability are enhanced, and running safety is ensured.

Description

Technical Field

[0001] The present invention relates to the field of vehicle control technology, and in particular to a vehicle brake control method, device, equipment and medium based on vehicle gas tank air pressure. Background Art

[0002] As global awareness of environmental protection increases and the energy crisis intensifies, the development of new energy vehicles has become one of the key ways to solve these problems. Especially in the field of commercial vehicles, due to their frequent use and long-term operation, the demand for energy efficiency improvement and emission reduction is more urgent.

[0003] The current brake inflation system control mainly relies on the air pressure range when the vehicle is powered on to turn on or off the brake inflation to ensure that the air pressure is within the normal range. This method is relatively simple and direct, and can ensure the normal driving of the vehicle to a certain extent. However, it mainly operates based on the status of the hardware, such as determining whether the air pump needs to be started by detecting the status of the pressure switch (closed or open). Although this method can meet basic operating requirements, it still needs to be improved in terms of efficiency and safety.

[0004] However, when the traditional method encounters a brake inflation system failure, it is unable to take timely measures to replenish the air pressure, which may affect the normal driving of the vehicle due to the exhaustion of air pressure; secondly, the traditional method fails to fully utilize the energy recovery characteristics of new energy vehicles, that is, the energy recovered during the braking process is not effectively used for inflation operations, resulting in a certain degree of energy waste; finally, the current control system lacks intelligent fault diagnosis functions, such as the inability to intelligently detect problems such as gas tank leakage, which not only affects the reliability of the system, but may also bring safety hazards to driving. Therefore, a more efficient and safe method is needed to control the vehicle. Summary of the invention

[0005] The main purpose of this application is to provide a vehicle braking control method, device, equipment and medium based on the vehicle gas tank pressure, aiming to solve the technical problem of how to reduce energy consumption and perform safe braking.

[0006] To achieve the above objectives, the present application proposes a vehicle braking control method based on vehicle gas tank pressure, the method comprising:

[0007] Get the vehicle's battery state of charge and gas tank pressure value;

[0008] Setting a pump-start pressure threshold according to the battery charge state;

[0009] When the pressure value of the gas tank is lower than the inflation start pressure threshold, the brake inverter is driven to drive the air pump to inflate the gas tank;

[0010] When a gas tank leak or an air pump abnormality is detected or the gas tank pressure value is continuously lower than the inflation start pressure threshold, the vehicle is restricted from traveling and an alarm is triggered.

[0011] In one embodiment, the step of setting the pumping start pressure threshold according to the battery charge state includes:

[0012] When the battery state of charge does not exceed the first preset ratio, setting the inflation start pressure threshold to the first preset value;

[0013] When the battery state of charge does not exceed the second preset ratio and exceeds the first preset ratio, setting the inflation start pressure threshold to the second preset value;

[0014] When the battery state of charge exceeds a second preset ratio, the inflation starting pressure threshold is set to a third preset value, wherein the second preset ratio is greater than the first preset ratio, the first preset value is less than the second preset value, and the second preset value is less than the third preset value.

[0015] In one embodiment, the step of setting the pumping start pressure threshold according to the battery state of charge further includes:

[0016] Obtain vehicle driving conditions;

[0017] According to the vehicle driving condition, the vehicle driving slope, the condition type and the driving time are obtained;

[0018] When the vehicle driving slope exceeds a preset slope, the operating condition type is downhill, and the driving time exceeds a preset time, the inflation starting air pressure threshold is set to a third preset value.

[0019] In one embodiment, when the pressure value of the gas tank is lower than the inflation start pressure threshold, after the step of driving the brake inverter to drive the air pump to inflate the gas tank, the method further includes:

[0020] Get the working time of the brake inverter;

[0021] When the working time exceeds the preset time and the gas tank pressure does not reach the inflation start pressure threshold at this time, it is determined that the gas tank is leaking or the air pump is abnormal.

[0022] In one embodiment, when a gas tank leak or an air pump abnormality is detected or the gas tank pressure value is continuously lower than the inflation start pressure threshold, the step of restricting vehicle travel and triggering an alarm includes:

[0023] When it is detected that the gas tank is leaking or the air pump is abnormal, or the pressure value of the gas tank is continuously lower than the inflation start pressure threshold, the inflation is stopped;

[0024] Get the vehicle driving status;

[0025] According to the driving state of the vehicle, the ratio of the energy recovery torque to the air brake torque is adjusted to brake the vehicle and reduce the air pressure, thereby obtaining a real-time air pressure value;

[0026] When the real-time air pressure value is lower than the preset safety air pressure, the vehicle is restricted from traveling and an alarm is triggered.

[0027] In one embodiment, the calibration of the preset safety air pressure includes:

[0028] Obtain the vehicle's gas tank capacity and vehicle braking requirements;

[0029] adjusting the preset safety air pressure according to the air tank capacity and the vehicle braking requirements;

[0030] When the gas tank pressure is lower than the preset safety air pressure, the brake inverter is started to work until the pressure returns to the first preset value.

[0031] In one embodiment, the step of adjusting the ratio of the energy recovery torque to the air brake torque according to the vehicle driving state to brake the vehicle and reduce the air pressure comprises:

[0032] Obtain the vehicle's brake pedal opening, vehicle speed and driving slope;

[0033] Calculating the total braking torque according to the brake pedal opening, vehicle speed and driving slope;

[0034] Obtain the vehicle's battery recharging power and motor capacity;

[0035] Calculating based on the allowable recharge power of the battery and the motor capacity to obtain a maximum electric braking torque;

[0036] The actual electric braking torque is set to a value having different ratios of the total braking torque to the maximum electric braking torque for braking.

[0037] In addition, to achieve the above purpose, the present application also proposes a vehicle brake control device based on vehicle gas tank pressure, the vehicle brake control device based on vehicle gas tank pressure comprising:

[0038] An acquisition module, used to obtain the battery state of charge and gas tank pressure value of the vehicle;

[0039] A setting module, used for setting a pumping start pressure threshold according to the battery charge state;

[0040] An operating module, used for driving the brake inverter to drive the air pump to inflate the air tank when the pressure value of the air tank is lower than the inflation start air pressure threshold;

[0041] The execution module is used to restrict vehicle travel and trigger an alarm when a gas tank leak or an air pump abnormality is detected or the gas tank pressure value is continuously lower than the inflation start pressure threshold.

[0042] In addition, to achieve the above-mentioned purpose, the present application also proposes a medium, which is a computer-readable medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the vehicle braking control method based on the vehicle gas tank pressure as described above are implemented.

[0043] In addition, to achieve the above-mentioned purpose, the present application also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, it implements the steps of the vehicle braking control method based on the vehicle gas tank pressure as described above.

[0044] This application obtains the battery charge state and gas tank pressure value of the vehicle, sets the inflation start pressure threshold according to the battery charge state, and when the gas tank pressure value is lower than the inflation start pressure threshold, drives the brake inverter to drive the air pump to inflate the gas tank. When the gas tank leaks or the air pump is abnormal or the gas tank pressure value is continuously lower than the inflation start pressure threshold, the vehicle is restricted from driving and an alarm is triggered. By monitoring the battery charge state to set the inflation start pressure threshold, using the brake inverter to drive the air pump to inflate, and restricting the vehicle from driving and announcing when an abnormality is detected, the energy utilization rate of the vehicle is improved, the driving safety and reliability are enhanced, and the driving safety is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0046] Figure 1 This is a flow chart of a first embodiment of a vehicle brake control method based on vehicle gas tank pressure of the present application;

[0047] Figure 2 This is a flow chart of a second embodiment of a vehicle braking control method based on vehicle gas tank pressure of the present application;

[0048] Figure 3 This is a flow chart of a third embodiment of a vehicle braking control method based on vehicle gas tank pressure of the present application;

[0049] Figure 4 This is a schematic diagram of the module structure of a vehicle brake control device based on vehicle gas tank pressure according to an embodiment of the present application;

[0050] Figure 5 Schematic diagram of the device structure of the hardware operating environment involved in the vehicle brake control method based on the vehicle gas tank pressure in the embodiment of the present application.

[0051] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0052] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0053] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0054] The main solution of the embodiment of the present application is: by obtaining the battery charge state and the gas tank pressure value of the vehicle, the inflation starting pressure threshold is set according to the battery charge state; when the gas tank pressure value is lower than the inflation starting pressure threshold, the brake inverter is driven to drive the air pump to inflate the gas tank; when the gas tank leakage or the air pump abnormality is detected or the gas tank pressure value is continuously lower than the inflation starting pressure threshold, the vehicle travel is restricted and an alarm is triggered.

[0055] Based on this, the embodiment of the present application provides a vehicle braking control method based on the vehicle gas tank pressure, referring to Figure 1 , Figure 1 This is a flow chart of a first embodiment of a vehicle brake control method based on vehicle air tank pressure of the present application.

[0056] In this embodiment, the vehicle brake control method based on the vehicle gas tank pressure includes steps S10 to S40:

[0057] Step S10, obtaining the battery state of charge and the gas tank pressure value of the vehicle.

[0058] It should be noted that the battery state of charge (SOC) reflects the percentage of the remaining battery power, which directly affects whether the vehicle can effectively use the energy recovery system for brake pumping operations. By accurately monitoring the battery SOC, the air pressure threshold for pumping can be intelligently set to optimize the pumping timing and avoid unnecessary energy consumption. Specifically, when the vehicle is in operation, the vehicle controller monitors the battery SOC in real time and dynamically adjusts the pumping strategy according to different SOC levels. For example, when the battery power is sufficient, energy recovery can be used more actively to inflate the gas tank; when the power is low, it is necessary to limit the pumping to ensure the mileage. At the same time, the vehicle's gas tank pressure value is also one of the key parameters. It not only determines whether the pump needs to be started, but also affects the safety performance of the vehicle. When the gas tank pressure is detected to be lower than the preset starting pressure threshold, the system will automatically activate the brake inverter to drive the pump to inflate the gas tank to ensure that the air pressure is maintained within a safe range.

[0059] Step S20, setting the inflation start pressure threshold according to the battery charge state.

[0060] It should be noted that in specific operations, when the battery is at a high SOC level, it means that the vehicle has sufficient power resources for non-driving functions, such as air pump operation. At this time, a lower air pressure threshold can be set to trigger the air pump to work, using the surplus energy to inflate the gas tank as much as possible, thereby improving the energy recovery rate. On the contrary, if the battery SOC is low, indicating that the power resources are limited, the air pressure threshold for air pumping will be increased accordingly to reduce unnecessary energy consumption and give priority to the electric energy required for vehicle driving. In addition, this method of dynamically adjusting the air pressure threshold for air pumping based on the battery SOC can also effectively respond to different driving conditions and environmental requirements. For example, in the case of frequent starting and stopping in urban traffic conditions, the battery may often be at a higher SOC level, allowing more flexible energy recovery and reuse; while in long-distance high-speed driving, due to fewer opportunities for energy recovery, more attention is paid to energy saving to avoid excessive consumption of battery power.

[0061] Step S30, when the air tank pressure value is lower than the inflation start pressure threshold, the brake inverter is driven to drive the air pump to inflate the air tank.

[0062] It should be noted that the vehicle control unit (VCU) continuously monitors the real-time pressure in the gas tank and compares it with the preset inflation start pressure threshold. Once it detects that the gas tank pressure drops below the threshold, the VCU immediately issues a command to enable the brake inverter (DC / AC) to work. The brake inverter plays a vital role in this process. It can convert the DC power provided by the on-board battery into three-phase AC power suitable for driving the air pump, thereby efficiently powering the air pump. This design not only improves the energy conversion efficiency, but also enhances the response speed and stability of the system. As the air pump starts working, compressed air is continuously injected into the gas cylinder until the pressure in the gas tank returns to a safe level.

[0063] Further, step S30 also includes: obtaining the working time of the brake inverter; when the working time exceeds the preset time and the air tank pressure does not reach the air pressure threshold for starting the air pump at this time, it is determined that the air tank is leaking or the air pump is abnormal. Specifically, when the brake inverter is started, the vehicle controller (VCU) will record its working time. If the pressure of the air tank still does not reach the set air pressure threshold for starting the air pump within the preset time period, the system will determine that there is an abnormality. In this case, possible reasons include but are not limited to air tank leakage, inefficient or complete failure of the air pump, etc. Once it is detected that the above conditions are met, that is, when the working time of the brake inverter exceeds the preset time and the air tank pressure fails to rise to the expected level, the system will automatically trigger a series of protection measures. First, it will send an alarm signal to prompt the driver that there is a problem with the current system through the warning light and sound on the dashboard. Secondly, depending on the severity of the problem, the system may limit the maximum driving speed of the vehicle or directly prohibit further driving to avoid safety hazards caused by insufficient air pressure braking.

[0064] Step S40, when it is detected that the gas tank is leaking or the air pump is abnormal or the gas tank pressure value is continuously lower than the inflation start pressure threshold, the vehicle is restricted from traveling and an alarm is triggered.

[0065] It should be noted that the VCU will continuously monitor the pressure status of the gas tank and the working condition of the air pump. If a gas tank leaks or the air pump fails, the system will immediately identify these problems and respond quickly.

[0066] Once it is determined that the air tank is leaking or the air pump is not working properly, the system will automatically enter protection mode, limiting the vehicle's speed or even completely prohibiting further driving. This restriction is intended to prevent safety accidents caused by the failure of the air brake system. At the same time, the system will remind the driver of the current problem through warning lights and sound alarms on the dashboard so that timely countermeasures can be taken. In addition, in some advanced systems, fault information will be sent to the service center through the on-board communication module to quickly obtain technical support and repair assistance.

[0067] Furthermore, when the air tank pressure value continues to be lower than the inflation start pressure threshold for a period of time, it usually means that the system cannot normally provide enough compressed air to the braking system. At this time, in addition to restricting vehicle travel and issuing an alarm, the system will also try to readjust the inflation strategy, such as increasing the battery energy supply priority to restore the air tank pressure as soon as possible. However, if these efforts still cannot solve the problem, the system will continue to maintain the vehicle travel restriction state until it is confirmed that the problem has been resolved.

[0068] This embodiment provides a vehicle brake control method based on the vehicle gas tank pressure. By acquiring the battery charge state and the gas tank pressure value of the vehicle, the inflation start pressure threshold is set according to the battery charge state. When the gas tank pressure value is lower than the inflation start pressure threshold, the brake inverter is driven to drive the air pump to inflate the gas tank. When the gas tank leaks or the air pump is abnormal or the gas tank pressure value is continuously lower than the inflation start pressure threshold, the vehicle is restricted from driving and an alarm is triggered. By monitoring the battery charge state to set the inflation start pressure threshold, using the brake inverter to drive the air pump to inflate, and restricting the vehicle from driving and alarming when an abnormality is detected, the energy utilization rate of the vehicle is improved, the driving safety and reliability are enhanced, and the driving safety is ensured.

[0069] Based on the first embodiment of the present application, in the second embodiment of the present application, the same or similar contents as those in the above-mentioned embodiment 1 can refer to the above introduction, and will not be repeated later. Figure 2 The vehicle braking control method based on the vehicle gas tank pressure step S20 also includes steps S201 to S203:

[0070] Step S201, when the battery state of charge does not exceed the first preset ratio, the inflation start pressure threshold is set to the first preset value.

[0071] It should be noted that in this implementation, when the battery SOC is lower than 95%, the inflation start pressure threshold is set to N2 or the pressure switch is closed, and the inflation stop pressure threshold is set to N1 and the pressure switch is disconnected. For example, assuming N1 = 8 bar, N2 = 6 bar, when the gas tank pressure drops below 6 bar, the system will activate the brake inverter to drive the air pump to inflate; and when the air pressure returns to above 8 bar, the air pump stops working. As the battery SOC increases, the system strategy will also be adjusted accordingly.

[0072] Step S202, when the battery state of charge does not exceed the second preset ratio and exceeds the first preset ratio, the inflation start pressure threshold is set to the second preset value.

[0073] It should be noted that when the battery SOC is between 95% and 98%, it indicates that the battery has sufficient power for non-critical functions. At this time, in order to maximize the use of remaining energy, the system will increase the inflation start pressure threshold to N2+1 (i.e. 7 bar), and require certain energy recovery conditions to be met, and adjust the inflation stop pressure threshold to N1+1 (i.e. 9 bar). This setting allows the system to use as much energy recovered during regenerative braking as possible to replenish the gas tank pressure while ensuring sufficient braking force.

[0074] Step S203, when the battery state of charge exceeds the second preset ratio, the inflation start pressure threshold is set to a third preset value.

[0075] It should be noted that when the battery SOC reaches or exceeds 98%, or the battery allows recharging power greater than the braking DCAC working power, the system further optimizes its strategy: the inflation start pressure threshold is set to N2+2 (i.e. 8 bar), and the energy recovery conditions must also be met, and the inflation stop pressure threshold is adjusted to N1+2 (i.e. 10 bar). This means that in a high-power state, the system is more inclined to use energy recovery to complete the inflation operation, reducing the need for direct battery power supply, thereby improving overall energy efficiency.

[0076] The second preset ratio is greater than the first preset ratio, the first preset value is less than the second preset value, and the second preset value is less than the third preset value.

[0077] Furthermore, the above setting of the air pressure threshold for starting the gas pump also includes: obtaining the vehicle driving condition; obtaining the vehicle driving slope, the working condition type and the driving time according to the vehicle driving condition; when the vehicle driving slope exceeds the preset slope, the working condition type is downhill and the driving time exceeds the preset time, the air pressure threshold for starting the gas pump is set to the third preset value. Specifically, the driving state of the vehicle is monitored in real time, including key parameters such as driving slope, working condition type (such as flat road, uphill, downhill, etc.) and driving time. Based on these data, the system can dynamically adjust the air pressure threshold for starting the gas pump to adapt to different driving conditions and needs. When the vehicle driving slope exceeds the preset slope, the working condition type is downhill, and the driving time also exceeds the preset time, a specific air pressure threshold for starting the gas pump will be set, that is, the third preset value. For example, assuming that the preset slope is 5%, the preset time is 10 minutes, and the third preset value is 7bar. In this case, if the vehicle is driving on a downhill section that lasts for more than 10 minutes and the slope is greater than 5%, the air pressure threshold for starting the gas pump will be automatically adjusted to 7bar. The logic behind this strategy is that when driving on long downhill sections, the vehicle frequently uses the braking system, especially the pneumatic braking system, which has a significantly increased operating frequency. In order to ensure sufficient braking force and prevent safety hazards caused by insufficient air pressure, it is necessary to start the air pump in advance to replenish the air tank pressure. By lowering the air pressure threshold for starting the air pump, the air pumping operation can be triggered earlier to ensure that a sufficient pressure level is always maintained in the air tank. In addition, considering that long-term downhill driving will place a heavy burden on the braking system, an energy recovery mechanism will be combined to reduce the pressure on the braking system. For example, when the energy recovery conditions are met, electric braking is used instead of pneumatic braking to reduce the rate at which the air tank pressure is consumed. This not only helps to extend the service life of the air tank, but also improves the efficiency of the entire braking system.

[0078] Furthermore, the battery fault is divided into a first fault and a second fault, and hierarchical and differentiated processing is performed based on the first fault and the second fault. When a level 1 battery fault is detected, it means that the battery can still work normally to a certain extent although there are some problems, such as slight voltage instability or temperature abnormality. In this case, the system will give priority to trying to continue the inflation operation without affecting energy recovery. Specifically, the system will evaluate the current driving conditions and energy recovery potential, and use as much energy recovered during regenerative braking as possible to drive the air pump. Doing so will not only reduce the need for direct battery power, but also effectively extend the battery life.

[0079] For secondary battery failure, it indicates that the battery has a more serious failure, such as severe voltage drop, overheating or other conditions that may cause system instability. Nevertheless, as long as the energy recovery function is not completely limited, the system will try to use this function for inflation. For example, when the vehicle is going downhill or decelerating, the energy recovery efficiency is enhanced by increasing the electric braking torque, and this part of the recovered energy is used to replenish the gas tank pressure. However, if the battery failure reaches the level of limiting energy recovery, the system needs to adopt a more conservative strategy, such as reducing vehicle performance or limiting driving speed to ensure that the remaining power can support key safety functions, such as basic lighting and signal indication. In addition, after any level of battery failure is triggered, the system will monitor the changes in battery status in real time and dynamically adjust the inflation strategy according to the recovery situation. For example, if the battery failure is quickly repaired or the status improves, the system can gradually resume normal inflation operation; on the contrary, if the fault continues to deteriorate, it is necessary to further strengthen the protection measures, including but not limited to restricting vehicle driving until the fault is eliminated.

[0080] This embodiment optimizes energy usage and improves driving safety by setting the inflation starting pressure threshold in stages according to the battery charge state.

[0081] Based on the first embodiment of the present application, in the third embodiment of the present application, the same or similar contents as those in the first embodiment can be referred to the above description, and will not be described in detail later. Figure 3 The vehicle braking control method based on the vehicle gas tank pressure further includes steps S301 to S304 after step S40:

[0082] Step S301, when it is detected that the gas tank is leaking or the air pump is abnormal or the pressure value of the gas tank is continuously lower than the inflation start pressure threshold, stop inflation.

[0083] It should be noted that when a gas tank leak, an air pump anomaly, or the gas tank pressure value is continuously lower than the set inflation start pressure threshold, the system will take a series of measures to ensure driving safety and equipment protection. First, once any of the above problems are confirmed, the system will immediately stop the inflation operation to prevent further consumption of battery power or aggravation of potential faults. For example, if a gas tank leak is detected, continuing to inflate will not only fail to effectively increase the air pressure, but may also accelerate the depletion of battery power, affecting the overall operating performance of the vehicle.

[0084] Step S302, obtaining the vehicle driving status.

[0085] Step S303, adjusting the ratio of the energy recovery torque to the air brake torque according to the vehicle driving state to brake the vehicle and reduce the air pressure to obtain a real-time air pressure value.

[0086] It should be noted that when the vehicle is under different driving conditions, the current speed, load, slope and brake pedal opening will be evaluated in real time, and the optimal energy recovery torque and air brake torque distribution ratio will be calculated accordingly. For example, when decelerating on a flat road or driving downhill slightly, if the battery charge state allows, the energy recovery torque will be increased first, reducing the reliance on air pressure braking, thereby reducing the pressure consumption rate of the gas tank. In this way, not only can the service life of the gas tank be effectively extended, but the energy utilization efficiency of the whole vehicle can also be improved. At the same time, the actual pressure value of the gas tank is continuously monitored to ensure that it always remains within a safe range. In the case of long downhill or emergency braking, since a greater braking force is required to ensure driving safety, the proportion of air brake braking torque will be increased accordingly, but energy recovery will still be used as much as possible without affecting safety. This can not only meet the instantaneous high braking force requirements, but also maximize energy recovery and replenish battery power.

[0087] Further, step S303 also includes: obtaining the brake pedal opening, vehicle speed and driving slope of the vehicle; calculating the total braking torque according to the brake pedal opening, vehicle speed and driving slope, obtaining the battery allowable recharge power and motor capacity of the vehicle, calculating based on the battery allowable recharge power and motor capacity, obtaining the maximum electric braking torque, and setting the actual electric braking torque to a value of different proportions of the total braking torque and the maximum electric braking torque for braking. Specifically, the brake pedal opening, current vehicle speed and driving slope are monitored in real time, and these data are used to calculate the required total braking torque. For example, in a typical scenario, when the vehicle is traveling at a high speed and decelerating on a downhill section, the system will accurately calculate the total braking torque that meets safety requirements based on the depth of the brake pedal pressed by the driver, as well as the vehicle speed and slope. Next, the maximum recharge power currently allowed by the battery and the capacity of the motor are evaluated to determine the maximum electric braking torque that can be used. This process ensures that electric braking can not only meet immediate braking needs, but also effectively convert kinetic energy into electrical energy and store it back in the battery, thereby improving overall energy utilization. In practical applications, the actual electric braking torque will be set as a part of the total braking torque according to the specific situation. For example, in the case of light braking, if the battery has sufficient recharge capacity and the motor can provide enough torque, the system may set the actual electric braking torque to 70% of the total braking torque, and the rest will be completed by traditional pneumatic braking; in emergency braking or when the battery is close to full charge, the proportion of electric braking may be reduced to 30%, relying more on pneumatic braking to ensure driving safety.

[0088] Step S304: when the real-time air pressure value is lower than the preset safety air pressure, the vehicle is restricted from traveling and an alarm is triggered.

[0089] It should be noted that once the air pressure is detected to be below the preset safety pressure, for example, below 6 bar (the specific value depends on the vehicle model and design standards), a series of protective measures will be automatically triggered. The first measure is to limit the vehicle's speed or directly prohibit further driving. By limiting the vehicle's power output, the reliance on the braking system, especially the demand for air brakes, can be reduced, thereby avoiding the reduction of braking efficiency due to insufficient air pressure. This limitation can not only protect the key components of the vehicle from damage, but also effectively prevent traffic accidents caused by insufficient braking force. At the same time, the system will notify the driver of the current emergency situation through the warning light on the dashboard and the sound alarm. These alarm signals are designed to remind the driver to take immediate action, such as stopping for inspection or seeking professional help. In addition, some advanced systems may also be equipped with an on-board communication module that automatically sends fault information to the service center when a serious air pressure problem is detected, so that rescue or repair services can be arranged quickly.

[0090] Further, the calibration step for the preset safety air pressure includes: obtaining the gas tank capacity of the vehicle and the vehicle braking demand; adjusting the preset safety air pressure according to the gas tank capacity and the vehicle braking demand; when the gas tank pressure is lower than the preset safety air pressure, starting the brake inverter to work until the pressure returns to the first preset value. Specifically, the preset safety air pressure threshold will be dynamically adjusted according to the actual capacity of the gas tank and the current vehicle braking demand. For example, if the vehicle often needs to perform high-intensity braking operations (such as frequent urban traffic or mountain road driving), the safety air pressure threshold may be increased accordingly to ensure sufficient braking force. Assuming that the gas tank capacity is 50 liters and the vehicle braking demand is high, the system may set the preset safety air pressure to 8 bar to ensure that sufficient air pressure braking capacity can be provided under any circumstances. When the vehicle is in a low braking demand state (such as cruising on a highway), the threshold can be appropriately reduced to 6 bar, thereby optimizing the energy efficiency of the system. Once it is detected that the gas tank pressure is lower than the preset safety air pressure threshold, the brake inverter will be started immediately to drive the air pump to inflate the gas tank. This process will continue until the pressure in the gas tank returns to the first preset value (e.g. 7 bar). During this period, the system will not only monitor the pressure changes in the gas tank, but also adjust the working intensity of the air pump in real time to ensure that the air pressure can be replenished quickly without excessively consuming battery power.

[0091] This embodiment stops pumping when a leak in the gas tank or an abnormality in the gas pump is detected, adjusts the ratio of energy recovery and air brake torque according to the vehicle's driving state to optimize braking and monitor air pressure. When the air pressure is lower than the safe value, driving is restricted and an alarm is issued to improve safety, optimize energy utilization and enhance system reliability.

[0092] The present application also provides a vehicle brake control device based on the vehicle gas tank pressure, please refer to Figure 4, the device comprises:

[0093] The acquisition module 10 is used to obtain the battery charge state and gas tank pressure value of the vehicle;

[0094] A setting module 20 is used to set a pumping start pressure threshold according to the battery charge state;

[0095] The operating module 30 is used to drive the air pump to inflate the air tank by driving the brake inverter when the air tank pressure value is lower than the inflation start air pressure threshold;

[0096] The execution module 40 is used to restrict the vehicle from traveling and trigger an alarm when a gas tank leak or an air pump abnormality is detected or the gas tank pressure value is continuously lower than the inflation start pressure threshold.

[0097] The vehicle brake control device based on vehicle gas tank pressure provided by the present application adopts the vehicle brake control method based on vehicle gas tank pressure in the above embodiment, which can solve the technical problem of how to reduce energy consumption for safe braking. Compared with the prior art, the beneficial effects of the vehicle brake control device based on vehicle gas tank pressure provided by the present application are the same as the beneficial effects of the vehicle brake control method based on vehicle gas tank pressure provided by the above embodiment, and the other technical features of the vehicle brake control device based on vehicle gas tank pressure are the same as the features disclosed in the above embodiment method, which will not be repeated here.

[0098] In one embodiment, the setting module 20 is also used to set the inflation start air pressure threshold to a first preset value when the battery state of charge does not exceed the first preset ratio; to set the inflation start air pressure threshold to a second preset value when the battery state of charge does not exceed the second preset ratio and exceeds the first preset ratio; and to set the inflation start air pressure threshold to a third preset value when the battery state of charge exceeds the second preset ratio.

[0099] In one embodiment, module 20 is set to also obtain the vehicle driving condition; obtain the vehicle driving slope, operating condition type and driving time according to the vehicle driving condition; when the vehicle driving slope exceeds the preset slope and the operating condition type is downhill and the driving time exceeds the preset time, the inflation starting pressure threshold is set to the third preset value.

[0100] In one embodiment, the operation module 30 is also used to obtain the working time of the brake inverter; when the working time exceeds the preset time and the air tank pressure does not reach the inflation start pressure threshold at this time, it is determined that the air tank is leaking or the air pump is abnormal.

[0101] In one embodiment, the execution module 40 is also used to stop pumping when a gas tank leak or an air pump abnormality is detected or the gas tank pressure value is continuously lower than the inflation start pressure threshold; obtain the vehicle driving state; adjust the ratio of the energy recovery torque and the air brake torque according to the vehicle driving state to brake the vehicle and reduce the air pressure to obtain a real-time air pressure value; when the real-time air pressure value is lower than the preset safety air pressure, restrict the vehicle driving and trigger an alarm.

[0102] In one embodiment, the execution module 40 is also used to obtain the gas tank capacity of the vehicle and the braking demand of the vehicle; adjust the preset safety air pressure according to the gas tank capacity and the braking demand of the vehicle; when the gas tank pressure is lower than the preset safety air pressure, start the brake inverter until the pressure returns to the first preset value.

[0103] In one embodiment, the execution module 40 is also used to obtain the vehicle's brake pedal opening, vehicle speed and driving slope; calculate based on the brake pedal opening, vehicle speed and driving slope to obtain the total braking torque; obtain the vehicle's battery allowable recharging power and motor capacity; calculate based on the battery allowable recharging power and motor capacity to obtain the maximum electric braking torque; set the actual electric braking torque to a value with different ratios of the total braking torque to the maximum electric braking torque for braking.

[0104] The present application provides a vehicle braking control device based on vehicle gas tank pressure, and the vehicle braking control device based on vehicle gas tank pressure includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the vehicle braking control method based on vehicle gas tank pressure in the above-mentioned embodiment one.

[0105] Reference below Figure 5 , which shows a schematic diagram of the structure of a vehicle brake control device based on vehicle gas tank pressure suitable for implementing the embodiment of the present application. The vehicle brake control device based on vehicle gas tank pressure in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions), PMPs (Portable Media Players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 5 The vehicle brake control device based on the vehicle air tank pressure shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0106] like Figure 5 As shown, the vehicle brake control device based on the vehicle gas tank pressure may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to the program stored in the ROM (Read Only Memory) 1002 or the program loaded from the storage device 1003 to the RAM (Random Access Memory) 1004. In the RAM 1004, various programs and data required for the operation of the vehicle brake control device based on the vehicle gas tank pressure are also stored. The processing device 1001, the ROM 1002 and the RAM 1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems may be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, a touchpad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), a speaker, a vibrator, etc.; storage devices 1003 including, for example, a magnetic tape, a hard disk, etc.; and communication devices 1009. The communication device 1009 may allow the vehicle brake control device based on the vehicle gas tank air pressure to communicate wirelessly or wired with other devices to exchange data. Although the figure shows a vehicle brake control device based on the vehicle gas tank air pressure with various systems, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems may be implemented or have alternatively.

[0107] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication device, or installed from a storage device 1003, or installed from a ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the method of the embodiment disclosed in the present application are executed.

[0108] The vehicle brake control device based on vehicle gas tank pressure provided by the present application adopts the vehicle brake control method based on vehicle gas tank pressure in the above embodiment, which can solve the technical problem of how to reduce energy consumption and perform safe braking. Compared with the prior art, the beneficial effects of the vehicle brake control device based on vehicle gas tank pressure provided by the present application are the same as the beneficial effects of the vehicle brake control method based on vehicle gas tank pressure provided by the above embodiment, and the other technical features of the vehicle brake control device based on vehicle gas tank pressure are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0109] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0110] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0111] The present application provides a computer-readable medium having computer-readable program instructions (ie, computer programs) stored thereon for calculation, and obtaining machine-readable program instructions for executing the vehicle braking control method based on vehicle gas tank pressure in the above-mentioned embodiment.

[0112] The computer-readable medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, systems or devices, or any combination thereof. More specific examples of computer-readable media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM: Random Access Memory), a read-only memory (ROM: Read Only Memory), an erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination thereof. In this embodiment, the calculation is performed to obtain a machine-readable medium that may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, system or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: Radio Frequency), etc., or any suitable combination thereof.

[0113] The computer-readable medium may be included in the vehicle brake control device based on the vehicle gas tank pressure; or may exist independently without being assembled into the vehicle brake control device based on the vehicle gas tank pressure.

[0114] The computer-readable medium carries one or more programs. When the one or more programs are executed by the vehicle brake control device based on the vehicle gas tank pressure, the vehicle brake control device based on the vehicle gas tank pressure can be written in one or more programming languages ​​or a combination thereof to perform computer program codes for the operation of the present application. The programming languages ​​include object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code can be executed completely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or completely on a remote computer or server. In the case of a remote computer, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computer (for example, using an Internet service provider to connect through the Internet).

[0115] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0116] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0117] The readable medium provided by the present application is a computer-readable medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned vehicle braking control method based on vehicle gas tank pressure, and can solve the technical problem of how to reduce energy consumption for safe braking. Compared with the prior art, the beneficial effects of the computer-readable medium provided by the present application are the same as the beneficial effects of the vehicle braking control method based on vehicle gas tank pressure provided by the above-mentioned embodiment, and will not be repeated here.

[0118] The present application also provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the vehicle braking control method based on the vehicle gas tank pressure as described above.

[0119] The computer program product provided by the present application can solve the technical problem of how to reduce energy consumption for safe braking. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the vehicle braking control method based on the vehicle gas tank pressure provided by the above embodiment, which will not be repeated here.

[0120] The above descriptions are only some embodiments of the present application, and are not intended to limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the technical concept of the present application, or direct / indirect applications in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A vehicle braking control method based on vehicle gas tank pressure, characterized in that: The method comprises: Get the vehicle's battery state of charge and gas tank pressure value; Setting a pump-start pressure threshold according to the battery charge state; When the pressure value of the gas tank is lower than the inflation start pressure threshold, the brake inverter is driven to drive the air pump to inflate the gas tank; When a gas tank leak or an air pump abnormality is detected or the gas tank pressure value is continuously lower than the inflation start pressure threshold, the vehicle is restricted from traveling and an alarm is triggered.

2. The method according to claim 1, characterized in that The step of setting the pumping start air pressure threshold according to the battery charge state comprises: When the battery state of charge does not exceed the first preset ratio, setting the inflation start pressure threshold to the first preset value; When the battery state of charge does not exceed the second preset ratio and exceeds the first preset ratio, setting the inflation start pressure threshold to the second preset value; When the battery state of charge exceeds a second preset ratio, the inflation starting pressure threshold is set to a third preset value, wherein the second preset ratio is greater than the first preset ratio, the first preset value is less than the second preset value, and the second preset value is less than the third preset value.

3. The method according to claim 1, characterized in that The step of setting the pumping start air pressure threshold according to the battery charge state also includes: Obtain vehicle driving conditions; According to the vehicle driving condition, the vehicle driving slope, the condition type and the driving time are obtained; When the vehicle driving slope exceeds a preset slope, the operating condition type is downhill, and the driving time exceeds a preset time, the inflation starting air pressure threshold is set to a third preset value.

4. The method according to claim 1, characterized in that When the pressure value of the gas tank is lower than the inflation start pressure threshold, after the step of driving the brake inverter to drive the air pump to inflate the gas tank, the method further includes: Get the working time of the brake inverter; When the working time exceeds the preset time and the gas tank pressure does not reach the inflation start pressure threshold at this time, it is determined that the gas tank is leaking or the air pump is abnormal.

5. The method according to claim 1, characterized in that The step of restricting vehicle travel and triggering an alarm when a gas tank leak or an air pump abnormality is detected or the gas tank pressure value is continuously lower than the inflation start pressure threshold comprises: When it is detected that the gas tank is leaking or the air pump is abnormal, or the pressure value of the gas tank is continuously lower than the inflation start pressure threshold, the inflation is stopped; Get the vehicle driving status; According to the driving state of the vehicle, the ratio of the energy recovery torque to the air brake torque is adjusted to brake the vehicle and reduce the air pressure, thereby obtaining a real-time air pressure value; When the real-time air pressure value is lower than the preset safety air pressure, the vehicle is restricted from traveling and an alarm is triggered.

6. The method according to claim 5, characterized in that The calibration of the preset safety air pressure includes: Obtain the vehicle's gas tank capacity and vehicle braking requirements; adjusting the preset safety air pressure according to the air tank capacity and the vehicle braking requirements; When the gas tank pressure is lower than the preset safety air pressure, the brake inverter is started to work until the pressure returns to the first preset value.

7. The method according to claim 5, characterized in that The step of adjusting the ratio of the energy recovery torque to the air brake torque according to the vehicle driving state to brake the vehicle and reduce the air pressure comprises: Obtain the vehicle's brake pedal opening, vehicle speed and driving slope; Calculating the total braking torque according to the brake pedal opening, vehicle speed and driving slope; Obtain the vehicle's battery recharging power and motor capacity; Calculating based on the allowable recharge power of the battery and the motor capacity to obtain a maximum electric braking torque; The actual electric braking torque is set to a value having different ratios of the total braking torque to the maximum electric braking torque for braking.

8. A vehicle brake control device based on vehicle gas tank pressure, characterized in that: The device comprises: An acquisition module, used to obtain the battery state of charge and gas tank pressure value of the vehicle; A setting module, used for setting a pumping start pressure threshold according to the battery charge state; An operating module, used for driving the brake inverter to drive the air pump to inflate the air tank when the pressure value of the air tank is lower than the inflation start air pressure threshold; The execution module is used to restrict vehicle travel and trigger an alarm when a gas tank leak or an air pump abnormality is detected or the gas tank pressure value is continuously lower than the inflation start pressure threshold.

9. A vehicle brake control device based on vehicle gas tank pressure, characterized in that: The device includes: a memory, a processor, and a vehicle braking control program based on vehicle gas tank pressure stored in the memory and running on the processor, wherein the vehicle braking control program based on vehicle gas tank pressure is configured to implement the steps of the vehicle braking control method based on vehicle gas tank pressure as described in any one of claims 1-7.

10. A storage medium, characterized in that: The storage medium stores a vehicle braking control program based on vehicle gas tank pressure, and when the vehicle braking control program based on vehicle gas tank pressure is executed by the processor, the steps of the vehicle braking control method based on vehicle gas tank pressure as described in any one of claims 1-7 are implemented.

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