Vehicle drive axle protection automatic control method, device, equipment, medium and program

Abstract

The invention discloses a vehicle drive axle protection automatic control method, device, equipment, medium and program, and the method comprises the steps: obtaining the depth of an accelerator pedal in real time, and starting vehicle drive axle protection if the depth of the accelerator pedal does not reach a depth threshold value; if the depth of the accelerator pedal reaches the depth threshold value, a real-time torque value is obtained; when the real-time torque value is smaller than the expected threshold value, protection quit timing is carried out, and when the real-time torque value reaches a first timing threshold value, vehicle drive axle protection is closed; when the real-time torque is larger than the expected torque, protection timing is carried out, and when the real-time torque reaches a second timing threshold value, vehicle drive axle protection is started; determining a driving state of the target form vehicle by using a rotating speed comparison rule; and if the vehicle is in the abnormal driving state, vehicle drive axle protection is closed. According to the embodiment of the invention, the control logic of the vehicle and the driving intention of the driver are closely combined, the drive axle protection strategy is adjusted in time by accurately distinguishing the normal driving state from the abnormal driving state, and the driving performance and the driving requirement are both considered.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a vehicle drive axle protection automatic control method, device, equipment, medium and program. Background Art

[0002] The vehicle drive axle is an important component that connects the engine (or drive motor) to the wheels, responsible for transmitting driving force and bearing road loads. Under extreme conditions, the drive axle may be damaged without protective measures. Existing protection measures rely on preset static safety thresholds to limit the maximum drive torque. These thresholds are calculated based on the maximum stress or rated stress of the drive axle.

[0003] Existing technologies are difficult to adapt to the changing actual operating environment and cannot take into account both the vehicle driving performance and the safety protection of the drive axle. If the maximum stress is used as the limit, the drive axle may be subjected to excessive stress for a long time when it is not necessary; if the rated stress is used as the limit, it is difficult to fully utilize the vehicle performance while ensuring the safety of the drive axle. Summary of the invention

[0004] Based on this, the present invention provides a vehicle drive axle protection automatic control method, device, equipment, medium and program to solve the problem that the prior art cannot protect the drive axle according to the driving state while taking into account the vehicle driving performance.

[0005] In a first aspect, an embodiment of the present invention provides a vehicle drive axle protection automatic control method, the method comprising:

[0006] When the target vehicle is in a starting state, the accelerator pedal depth of the target vehicle is obtained in real time. If the accelerator pedal depth does not reach a depth threshold, a vehicle drive axle protection instruction is sent to the drive motor, and the accelerator pedal depth is continuously monitored;

[0007] After sending the instruction to start the vehicle drive axle protection, if it is monitored that the accelerator pedal depth reaches the depth threshold, obtaining the real-time torque value of the target vehicle;

[0008] When the real-time torque value is monitored to be less than the expected threshold, the exit protection timer is started and the exit protection timing is performed. When the exit protection timing reaches a preset first timing threshold, a vehicle drive axle protection closing instruction is sent to the drive motor, and the exit protection timer is reset;

[0009] monitoring the real-time torque in real time, and when the real-time torque is greater than the expected torque, starting the protection timer and performing protection timing, and sending a vehicle drive axle protection start instruction to the drive motor when the protection timing reaches a preset second timing threshold;

[0010] After sending the vehicle drive axle protection start instruction to the drive motor again, the driving state of the target vehicle is determined by using a preset speed comparison rule; wherein the driving state includes a normal driving state and an abnormal driving state;

[0011] If it is determined that the driving state is an abnormal driving state, a command to close the vehicle drive axle protection is sent to the drive motor.

[0012] In a second aspect, an embodiment of the present invention provides a vehicle drive axle protection automatic control device, the device comprising:

[0013] A first accelerator pedal monitoring module is used to obtain the accelerator pedal depth of the target vehicle in real time when the target vehicle is in a starting state, and if the accelerator pedal depth does not reach a depth threshold, send a vehicle drive axle protection start instruction to the drive motor, and continuously monitor the accelerator pedal depth;

[0014] A second accelerator pedal monitoring module is used to obtain a real-time torque value of a target vehicle if it is monitored that the accelerator pedal depth reaches a depth threshold after sending a command to start the vehicle drive axle protection;

[0015] An exit protection timing module is used to start an exit protection timer and perform exit protection timing when the real-time torque value is monitored to be less than the expected threshold value, and when the exit protection timing reaches a preset first timing threshold value, send a vehicle drive axle protection closing instruction to the drive motor and reset the exit protection timer;

[0016] A protection timing module, for real-time monitoring of the real-time torque, and when the real-time torque is greater than the expected torque, starting a protection timer and performing protection timing, and sending a vehicle drive axle protection start instruction to the drive motor when the protection timing reaches a preset second timing threshold;

[0017] A driving state judgment module is used to determine the driving state of the target vehicle by using a preset speed comparison rule after sending a command to start the vehicle drive axle protection to the drive motor again; wherein the driving state includes a normal driving state and an abnormal driving state;

[0018] The protection closing module is used to send a vehicle drive axle protection closing instruction to the drive motor if it is determined that the driving state is an abnormal driving state.

[0019] In a third aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0020] at least one processor; and

[0021] a memory communicatively connected to the at least one processor; wherein,

[0022] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute a vehicle drive axle protection automatic control method as described in any embodiment of the present invention.

[0023] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement a vehicle drive axle protection automatic control method described in any embodiment of the present invention when executed.

[0024] In a fifth aspect, an embodiment of the present invention further provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements a vehicle drive axle protection automatic control method described in any embodiment of the present invention.

[0025] The technical solution of the embodiment of the present invention obtains the accelerator pedal depth in real time and uses it as the basis for judgment to turn on or off the drive axle protection, so that the control logic of the vehicle is closely integrated with the driver's driving intention. When the driver operates the accelerator pedal normally and the pedal depth reaches the depth threshold, the vehicle state is further evaluated to ensure that while ensuring the safety of the drive axle, the driver's normal driving needs are met as much as possible, reducing the impact of unnecessary restrictions on the driving experience. The vehicle's driving state is determined using a preset speed comparison rule, which can accurately distinguish between normal driving and abnormal driving states. This precise judgment helps the vehicle controller to adjust the drive axle protection strategy in a timely manner according to actual working conditions, avoid excessively restricting the output of the drive motor during normal driving, and ensure that the vehicle can operate efficiently in most cases.

[0026] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 is a flow chart of a vehicle drive axle protection automatic control method provided according to the first embodiment of the present invention;

[0029] Figure 2is a structural schematic diagram of a vehicle drive axle protection automatic control device provided according to Embodiment 3 of the present invention;

[0030] Figure 3 It is a structural schematic diagram of an electronic device of a vehicle drive axle protection automatic control method provided according to a fourth embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] Embodiment 1

[0034] Figure 1 This is a flow chart of a vehicle drive axle protection automatic control method provided in the first embodiment of the present invention. This embodiment can be applied to automatically control the vehicle drive axle protection to be turned on or off according to different driving scenarios. The method can be executed by a vehicle drive axle protection automatic control device, which can be implemented in the form of hardware and / or software. The device can be configured in various industrial transport vehicles and large passenger vehicles. Figure 1 As shown, the method includes:

[0035] S110. When the target vehicle is in a starting state, the accelerator pedal depth of the target vehicle is obtained in real time. If the accelerator pedal depth does not reach a depth threshold, a vehicle drive axle protection start instruction is sent to the drive motor, and the accelerator pedal depth is continuously monitored.

[0036] The target vehicle is the specific vehicle monitored and controlled by the drive axle protection system. The accelerator pedal depth represents the degree to which the driver steps on the accelerator pedal, reflecting the amount of power the driver expects the vehicle to obtain. The greater the depth, the greater the expected power. The depth threshold is a pre-set accelerator pedal depth value, which serves as a critical indicator for determining whether the drive axle protection needs to be turned on. The vehicle drive axle protection command is used to instruct the drive motor to enter the protection mode, limiting its output torque and other parameters to protect the drive axle from excessive stress.

[0037] When the target vehicle is in the starting stage, the depth of the driver's accelerator pedal is obtained in real time. If the depth does not reach the preset depth threshold, it means that the driver may have only slightly stepped on the accelerator pedal and the vehicle does not need much power output. At this time, in order to protect the drive axle, the system will send a command to the drive motor to start the vehicle drive axle protection, and continue to monitor the accelerator pedal depth, so as to make further decisions based on subsequent situations.

[0038] S120: After sending the instruction to start the vehicle drive axle protection, if it is monitored that the accelerator pedal depth reaches a depth threshold, the real-time torque value of the target vehicle is obtained.

[0039] When the accelerator pedal depth reaches the previously set depth threshold, it means that the driver may need more power. At this time, the system will obtain the real-time torque value of the target vehicle's drive motor to further determine whether the drive axle protection status needs to be adjusted. The real-time torque value refers to the actual torque output of the drive motor at the current moment, reflecting the current ability of the drive motor to provide power to the vehicle.

[0040] S130. When the real-time torque value is monitored to be less than the expected threshold, the exit protection timer is turned on and the exit protection timing is performed. When the exit protection timing reaches a preset first timing threshold, a command to close the vehicle drive axle protection is sent to the drive motor, and the exit protection timer is reset.

[0041] The expected threshold is a pre-set torque value, which serves as a reference standard for determining whether to consider exiting the drive axle protection. The exit protection timer is a timer used to record the duration of the real-time torque value being less than the expected threshold, so the exit protection timing corresponds to the time recorded by the exit protection timer. The first timing threshold is a pre-set time value, and when the exit protection timing reaches this value, the drive axle protection shutdown instruction is triggered. The vehicle drive axle protection shutdown instruction is a control signal used to instruct the drive motor to exit the protection mode and restore normal output torque and other parameters.

[0042] The real-time torque value is continuously monitored. When it is found that the real-time torque value is less than the preset expected threshold, it means that the torque output by the current drive motor is small and may not require the restriction of the drive axle protection. At this time, the exit protection timer starts timing. When the timing reaches the preset first timing threshold, it indicates that the real-time torque is less than the expected threshold within a certain period of time. The system believes that it is safe to exit the drive axle protection state, so it sends a command to the drive motor to turn off the vehicle drive axle protection, and resets the exit protection timer for next use.

[0043] S140, monitor the real-time torque in real time, and when the real-time torque is greater than the expected torque, start the protection timer and perform protection timing, when the protection timing reaches a preset second timing threshold, send a vehicle drive axle protection start instruction to the drive motor, and reset the protection timer.

[0044] The expected torque is a pre-set torque value, which is used as a reference standard for judging whether the drive axle protection needs to be turned on. The protection timer is used to record the timer when the real-time torque value is greater than the expected torque duration, so the protection timing corresponds to the time recorded by the protection timer. The second timing threshold is another pre-set time value. When the protection timing reaches this value, the drive axle protection instruction is triggered.

[0045] During vehicle driving, the real-time torque of the drive motor is continuously monitored in real time. When the real-time torque is greater than the expected torque, it means that the torque output by the drive motor is large, which may cause greater stress on the drive axle. At this time, the protection timer starts timing. When the protection timing reaches the preset second timing threshold, it indicates that the real-time torque is greater than the expected torque for a certain period of time. In order to protect the drive axle, the system sends a command to the drive motor to start the vehicle drive axle protection, and resets the protection timer at the same time to prepare for the next protection timing.

[0046] S150, after sending the vehicle drive axle protection start instruction to the drive motor again, determine the driving state of the target vehicle using a preset speed comparison rule; wherein the driving state includes a normal driving state and an abnormal driving state.

[0047] The speed comparison rules are a set of predefined rules for comparing vehicle speed parameters. These comparisons are used to determine whether the vehicle's driving state is normal. The normal driving state refers to the non-accelerated driving of the vehicle under normal driving conditions; and the abnormal driving state refers to the vehicle may face abnormal situations such as climbing a slope or accelerating with a heavy load.

[0048] S160: If it is determined that the driving state is an abnormal driving state, a command to close the vehicle drive axle protection is sent to the drive motor.

[0049] When the speed comparison rule determines that the vehicle is in an abnormal driving state, in order to allow the vehicle to obtain greater power to escape the abnormal situation, the system will send a command to the drive motor to close the vehicle drive axle protection, so that the drive motor can output greater torque to meet the vehicle's power requirements under special circumstances.

[0050] The technical solution of the embodiment of the present invention obtains the accelerator pedal depth in real time and uses it as the basis for judgment to turn on or off the drive axle protection, so that the control logic of the vehicle is closely integrated with the driver's driving intention. When the driver operates the accelerator pedal normally and the pedal depth reaches the depth threshold, the vehicle state is further evaluated to ensure that while ensuring the safety of the drive axle, the driver's normal driving needs are met as much as possible, reducing the impact of unnecessary restrictions on the driving experience. The vehicle's driving state is determined using a preset speed comparison rule, which can accurately distinguish between normal driving and abnormal driving states. This precise judgment helps the vehicle controller to adjust the drive axle protection strategy in a timely manner according to actual working conditions, avoid excessively restricting the output of the drive motor during normal driving, and ensure that the vehicle can operate efficiently in most cases.

[0051] Optionally, determining the driving state of the target driving vehicle using a preset speed comparison rule may include:

[0052] Acquire a current speed value of the target driving vehicle corresponding to the real-time torque value, and compare the current speed value with a preset expected speed value;

[0053] If the current speed value is greater than or equal to the expected speed value, it is determined that the target vehicle is in a normal driving state; otherwise, it is determined that the target vehicle is in a state to be accelerated;

[0054] When it is determined that the target vehicle is in a state to be accelerated, the cycle time closest to the acquisition time of the current speed value is obtained, and the target cycle speed value at the cycle time is obtained; wherein the vehicle controller collects the cycle speed value according to a preset cycle;

[0055] If the current speed value is less than or equal to the target cycle speed value, it is determined that the target vehicle is in an abnormal driving state;

[0056] If the current speed value is greater than the sum of the target period speed value and the preset step length, it is determined that the target vehicle is in a normal driving state;

[0057] If the current speed value is less than or equal to the sum of the target cycle speed value and the preset step size, and the current speed value is greater than the target cycle speed value, the driving state of the target vehicle is jointly determined based on multiple cycle speed values ​​at multiple cycle moments.

[0058] In the embodiment of the present invention, when judging the driving state of the vehicle, the current speed value of the vehicle, that is, the actual speed under the current torque output state of the vehicle, must first be obtained. According to the comparison result of the first step, if the current speed value is greater than or equal to the expected speed value, it means that the current running speed of the vehicle has reached or exceeded the expectation, and the vehicle is considered to be in a normal driving state. If the current speed value is less than the expected speed value, it means that the current speed of the vehicle has not reached the expectation and there is still a need for acceleration, so it is determined that the vehicle is in a state to be accelerated.

[0059] The periodic moment refers to the vehicle controller collecting the speed at a preset fixed time interval (i.e., the preset period), and the time points of collecting the speed are the periodic moments. The target periodic speed value refers to the speed value of the vehicle collected by the vehicle controller at the above-determined periodic moment, which is used to compare with the current speed value to assist in determining the vehicle's driving state. Compare the current speed value with the target periodic speed value. If the current speed value is less than or equal to the target periodic speed value, it means that the vehicle's speed has not only not increased, but has even decreased or remained unchanged. This is abnormal in the acceleration state, and the vehicle is deemed to be in an abnormal driving state at this time.

[0060] The preset step length is a pre-set value. When the current speed value is greater than the sum of the target cycle speed value and the preset step length, it means that the speed of the vehicle has been significantly improved in the acceleration state, exceeding the speed value of the previous cycle plus a preset growth rate (preset step length). In this case, it can be considered that the acceleration of the vehicle is normal, so it is determined that the vehicle is in a normal driving state. If the current speed value is in an intermediate range, that is, less than or equal to the sum of the target cycle speed value and the preset step length, and greater than the target cycle speed value, it means that the driving state of the vehicle cannot be clearly judged only by a simple comparison of the current speed value, the target cycle speed value and the preset step length. At this time, it is necessary to comprehensively consider multiple cycle speed values ​​at multiple cycle moments, and analyze the change trend of these historical speed data and other information to jointly determine whether the vehicle is in a normal driving state or an abnormal driving state.

[0061] Further, if the current speed value is less than or equal to the sum of the target cycle speed value and the preset step length, and the current speed value is greater than the target cycle speed value, then the driving state of the target vehicle is jointly determined according to multiple cycle speed values ​​at multiple cycle moments, which may include:

[0062] If the current speed value is less than or equal to the sum of the target period speed value and the preset step length, and the current speed value is greater than the target period speed value, then after initializing the preset pedometer, the pedometer is incremented by 1;

[0063] After obtaining a new target periodic speed value again at a new periodic time, re-determine whether the current speed value is less than or equal to the sum of the target periodic speed value and the preset step length, and whether the current speed value is greater than the target periodic speed value;

[0064] If it is determined that the condition is met, the pedometer is incremented by 1, and it is determined whether the current step count value in the pedometer is greater than the preset count value;

[0065] If yes, it is determined that the driving state of the target vehicle is an abnormal driving state; otherwise, it returns to execute the operation of obtaining a new target cycle speed value again at a new cycle time;

[0066] If it is determined that the condition is not met, the target vehicle is determined to be in a normal driving state.

[0067] Specifically, the preset pedometer is a pre-set tool or variable for counting. In this scenario, it is used to record the number of cycles that meet the condition that "the current speed value is less than or equal to the sum of the target cycle speed value and the preset step length, and the current speed value is greater than the target cycle speed value". Set the value of the pedometer to the initial state, generally 0, and increase the current value of the pedometer by 1 to record a situation in which the condition is met. The vehicle controller collects data according to the preset cycle, and each collection time point is a cycle moment. The new cycle moment refers to the next collection time point after the current moment. If the current speed value still meets the specific range condition at the new cycle moment, the pedometer value is added by 1 again, and then the current step value of the pedometer is compared with the preset count value to determine whether the number of cycles for which this specific speed situation has continued has reached a threshold.

[0068] If the current step count value of the pedometer is greater than the preset count value, it means that the vehicle has been in a specific speed state for too long and does not conform to the speed change law of normal driving. Therefore, it is determined that the vehicle is in an abnormal driving state. If the current step count value of the pedometer is not greater than the preset count value, continue to wait for the next cycle moment, obtain a new target cycle speed value and repeat the above judgment process. It should be noted that if at the new cycle moment, the current speed value does not meet the condition of "less than or equal to the sum of the target cycle speed value and the preset step length, and greater than the target cycle speed value", it means that the vehicle's speed change has jumped out of the previous specific range and may have entered the normal speed change mode. Therefore, it is determined that the vehicle is in a normal driving state.

[0069] Optionally, before comparing the current rotation speed value with the corresponding expected rotation speed value, the following steps may also be included:

[0070] Real-time detection of the brake pedal status;

[0071] If it is detected that the brake pedal is not effective, the expected speed value is determined as the target speed corresponding to the current accelerator pedal depth;

[0072] If it is detected that the brake pedal is effective, the expected rotation speed value is determined to be 0.

[0073] The state of the brake pedal refers to whether the brake pedal is stepped on by the driver, and is divided into two states: effective (stepped on) and ineffective (not stepped on). By continuously obtaining the current state information of the brake pedal, it is determined whether the brake pedal is stepped on (i.e., effective), so as to determine the value of the expected speed value according to the braking operation. When it is detected that the brake pedal is not stepped on, it means that the driver has not performed a braking operation. At this time, the speed of the vehicle is mainly determined by the operation of the accelerator pedal. Therefore, the expected speed value is set to the target speed corresponding to the current depth of the accelerator pedal being stepped on. Generally, the deeper the depth of the accelerator pedal, the higher the speed that the vehicle is expected to reach. When it is detected that the brake pedal is stepped on, it means that the driver's driving intention is to slow down or stop the vehicle. At this time, the expected speed value is set to 0, because the purpose of the braking operation is to stop the vehicle or reduce the speed. In theory, the final expected speed is 0 speed in a stationary state.

[0074] Further, the vehicle drive axle protection activation instruction is used to instruct the drive motor to set the maximum output torque to a first output torque corresponding to the rated stress of the drive axle;

[0075] The vehicle drive axle protection shutdown instruction is used to instruct the drive motor to set the maximum output torque to a second output torque corresponding to the maximum stress borne by the drive axle; wherein the first output torque is smaller than the second output torque.

[0076] The vehicle drive axle protection start instruction is used to trigger the drive axle protection mechanism, instructing the drive motor to adjust the maximum output torque to protect the drive axle; the maximum output torque refers to the maximum torque that the drive motor can output, which determines the maximum power that the drive motor can provide at an instant, affecting the acceleration performance and load capacity of the vehicle; the rated stress is the maximum stress value that the drive axle can stably withstand for a long time under normal working conditions. This is an important parameter determined during the design and manufacture of the drive axle, reflecting the basic load-bearing capacity of the drive axle. When the vehicle controller issues a vehicle drive axle protection start instruction, the instruction will be conveyed to the drive motor. After receiving the instruction, the drive motor will adjust its maximum output torque and set it to the first output torque corresponding to the rated stress of the drive axle. The purpose of this is to protect the drive axle in some cases so that the stress it bears does not exceed its rated bearing capacity, and to prevent the drive axle from fatigue damage due to long-term excessive stress.

[0077] The instruction to turn off the vehicle drive axle protection is used to release the drive axle protection mechanism, allowing the drive motor to output a larger torque; the maximum stress is the maximum stress limit that the drive axle can withstand in a short period of time. If this value is exceeded, the drive axle may be damaged. When the vehicle control system issues an instruction to turn off the vehicle drive axle protection, the drive motor adjusts its maximum output torque to the second output torque corresponding to the maximum stress of the drive axle according to the instruction. Since the first output torque is set to protect the drive axle within the rated stress range, it is relatively small; and the second output torque corresponds to the maximum stress of the drive axle, so the first output torque is smaller than the second output torque. In some special cases, such as when the vehicle needs to output a large power instantly for overtaking, climbing and other operations, the drive axle protection can be turned off to enable the drive motor to output a larger torque, but the stress on the drive axle will increase at this time, and it needs to be carried out within a safe range.

[0078] Optionally, the method may further include:

[0079] When the target vehicle has completed starting and is in a normal driving state, the real-time output torque of the drive motor is continuously monitored, and when the real-time output torque is greater than the first output torque corresponding to the rated stress of the drive axle, the first protection timing is started;

[0080] When the first protection timing reaches the first protection threshold, a vehicle drive axle protection start instruction is sent to the drive motor, and a second protection timing is started;

[0081] When the second protection timing reaches the second protection threshold, the driving state of the target vehicle is judged, and if it is in an abnormal driving state, a command to close the vehicle drive axle protection is sent to the drive motor.

[0082] The first protection timing is a timer used to record the duration of the real-time output torque of the drive motor exceeding the first output torque, and the timing starts from the moment when the real-time output torque is greater than the first output torque. When the target vehicle completes the starting operation and enters the normal driving state, the vehicle controller begins to continuously monitor the real-time output torque of the drive motor. If it is monitored that the real-time output torque of the drive motor exceeds the first output torque corresponding to the rated stress of the drive axle, it means that the stress borne by the drive axle at this time may exceed its normal rated range. In order to prevent the drive axle from being damaged due to excessive stress for a long time, the system immediately starts the first protection timing and starts to record the duration of this state exceeding the rated stress.

[0083] The first protection threshold is a pre-set time value, which represents the longest allowed duration of the real-time output torque of the drive motor exceeding the first output torque. When the first protection timing reaches the threshold, the system will take corresponding protection measures. The second protection timing is a timer used to record the duration after the vehicle drive axle protection is turned on, and the timing starts from the moment the instruction to turn on the vehicle drive axle protection is sent. As the first protection timing proceeds, when the timing time reaches the pre-set first protection threshold, it means that the drive axle has been working continuously for a long time in a state exceeding the rated stress, and there is a risk of damage. At this time, the vehicle controller will send a vehicle drive axle protection turn-on instruction to the drive motor, so that the drive motor sets the maximum output torque to the first output torque corresponding to the rated stress of the drive axle to reduce the stress on the drive axle. At the same time, in order to further monitor the situation after the protection is turned on, the system turns on the second protection timing.

[0084] When the second protection timing reaches the preset second protection threshold, it means that the vehicle has been running in the drive axle protection state for a certain period of time, and the driving state of the target vehicle is re-judged at this time. If the vehicle is judged to be in an abnormal driving state, in order to allow the vehicle to obtain greater power, the controller will send a command to close the vehicle drive axle protection to the drive motor, so that the drive motor sets the maximum output torque to the second output torque corresponding to the maximum stress of the drive axle. Through the above control logic based on real-time monitoring, timing and threshold judgment, the vehicle drive axle protection system can flexibly adapt to different driving conditions of the vehicle while ensuring the safety of the drive axle.

[0085] Embodiment 2

[0086] Figure 2 This is a schematic diagram of the structure of a vehicle drive axle protection automatic control device provided by the second embodiment of the present invention. Figure 2 As shown, the device comprises:

[0087] The first accelerator pedal monitoring module 210 is used to obtain the accelerator pedal depth of the target vehicle in real time when the target vehicle is in a starting state, and if the accelerator pedal depth does not reach a depth threshold, send a vehicle drive axle protection start instruction to the drive motor, and continuously monitor the accelerator pedal depth;

[0088] The second accelerator pedal monitoring module 220 is used to obtain the real-time torque value of the target vehicle if the accelerator pedal depth reaches the depth threshold after sending the vehicle drive axle protection start instruction;

[0089] The exit protection timing module 230 is used to start the exit protection timer and perform the exit protection timing when the real-time torque value is monitored to be less than the expected threshold value, and when the exit protection timing reaches a preset first timing threshold value, send a vehicle drive axle protection closing instruction to the drive motor and reset the exit protection timer;

[0090] A protection timing module 240 is used to monitor the real-time torque in real time, and when the real-time torque is greater than the expected torque, start the protection timer and perform protection timing, and when the protection timing reaches a preset second timing threshold, send a vehicle drive axle protection start instruction to the drive motor and reset the protection timer;

[0091] The driving state judgment module 250 is used to determine the driving state of the target vehicle by using a preset speed comparison rule after sending the vehicle drive axle protection start instruction to the drive motor again; wherein the driving state includes a normal driving state and an abnormal driving state;

[0092] The protection closing module 260 is used to send a vehicle drive axle protection closing instruction to the drive motor if it is determined that the driving state is an abnormal driving state.

[0093] The technical solution of the embodiment of the present invention obtains the accelerator pedal depth in real time and uses it as the basis for judgment to turn on or off the drive axle protection, so that the control logic of the vehicle is closely integrated with the driver's driving intention. When the driver operates the accelerator pedal normally and the pedal depth reaches the depth threshold, the vehicle state is further evaluated to ensure that while ensuring the safety of the drive axle, the driver's normal driving needs are met as much as possible, reducing the impact of unnecessary restrictions on the driving experience. The vehicle's driving state is determined using a preset speed comparison rule, which can accurately distinguish between normal driving and abnormal driving states. This precise judgment helps the vehicle controller to adjust the drive axle protection strategy in a timely manner according to actual working conditions, avoid excessively restricting the output of the drive motor during normal driving, and ensure that the vehicle can operate efficiently in most cases.

[0094] Optionally, based on the above embodiments, the driving state determination module 250 may include:

[0095] A speed comparison unit, used to obtain a current speed value of the target driving vehicle corresponding to the real-time torque value, and compare the current speed value with a preset expected speed value;

[0096] A first state judgment unit is used to determine that the target vehicle is in a normal driving state if the current speed value is greater than or equal to the expected speed value; otherwise, determine that the target vehicle is in a state to be accelerated;

[0097] A periodic speed acquisition unit, used to acquire the periodic time closest to the acquisition time of the current speed value when determining that the target vehicle is in a state to be accelerated, and acquire the target periodic speed value at the periodic time; wherein the vehicle controller collects the periodic speed value according to a preset period;

[0098] A second state judgment unit, configured to determine that the target vehicle is in an abnormal driving state if the current speed value is less than or equal to the target period speed value;

[0099] A third state judgment unit, configured to determine that the target vehicle is in a normal driving state if the current speed value is greater than the sum of the target period speed value and a preset step length;

[0100] The complex condition judgment unit is used to jointly determine the driving state of the target vehicle based on multiple cycle speed values ​​at multiple cycle moments if the current speed value is less than or equal to the sum of the target cycle speed value and the preset step size, and the current speed value is greater than the target cycle speed value.

[0101] Optionally, based on the above embodiments, the complex condition judgment unit may also be used to initialize a preset pedometer and then perform a pedometer plus 1 processing on the pedometer if the current speed value is less than or equal to the sum of the target cycle speed value and the preset step length, and the current speed value is greater than the target cycle speed value;

[0102] After obtaining a new target periodic speed value again at a new periodic time, re-determine whether the current speed value is less than or equal to the sum of the target periodic speed value and the preset step length, and whether the current speed value is greater than the target periodic speed value;

[0103] If it is determined that the condition is met, the pedometer is incremented by 1, and it is determined whether the current step count value in the pedometer is greater than the preset count value;

[0104] If yes, it is determined that the driving state of the target vehicle is an abnormal driving state; otherwise, it returns to execute the operation of obtaining a new target cycle speed value again at a new cycle time;

[0105] If it is determined that the condition is not met, the target vehicle is determined to be in a normal driving state.

[0106] Optionally, based on the above embodiments, it further includes: an expected speed determination unit, used to detect the state of the brake pedal in real time before the speed comparison unit;

[0107] If it is detected that the brake pedal is not effective, the expected speed value is determined as the target speed corresponding to the current accelerator pedal depth;

[0108] If it is detected that the brake pedal is effective, the expected rotation speed value is determined to be 0.

[0109] Optionally, based on the above embodiments, the vehicle drive axle protection activation instruction is used to instruct the drive motor to set the maximum output torque to a first output torque corresponding to the rated stress of the drive axle;

[0110] The vehicle drive axle protection shutdown instruction is used to instruct the drive motor to set the maximum output torque to a second output torque corresponding to the maximum stress borne by the drive axle; wherein the first output torque is smaller than the second output torque.

[0111] Optionally, based on the above embodiments, it may further include: an automatic command control unit, which is used to continuously monitor the real-time output torque of the drive motor when the target vehicle completes starting and is in a normal driving state, and start the first protection timing when the real-time output torque is greater than the first output torque corresponding to the rated stress of the drive axle;

[0112] When the first protection timing reaches the first protection threshold, a vehicle drive axle protection start instruction is sent to the drive motor, and a second protection timing is started;

[0113] When the second protection timing reaches the second protection threshold, the driving state of the target vehicle is judged, and if it is in an abnormal driving state, a command to close the vehicle drive axle protection is sent to the drive motor.

[0114] An automatic control device for protecting a vehicle drive axle provided in an embodiment of the present invention can execute an automatic control method for protecting a vehicle drive axle provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0115] Embodiment 3

[0116] Figure 3 A schematic diagram of the structure of an electronic device 10 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0117] like Figure 3As shown, the electronic device 10 includes at least one processor 11, and a memory connected to the at least one processor 11, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 to the random access memory (RAM) 13. In the RAM 13, various programs and data required for the operation of the electronic device 10 can also be stored. The processor 11, the ROM 12, and the RAM 13 are connected to each other through a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0118] A number of components in the electronic device 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0119] The processor 11 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as a vehicle drive axle protection automatic control method.

[0120] That is, when the target vehicle is in the starting state, the accelerator pedal depth of the target vehicle is obtained in real time. If the accelerator pedal depth does not reach the depth threshold, a vehicle drive axle protection instruction is sent to the drive motor, and the accelerator pedal depth is continuously monitored;

[0121] After sending the instruction to start the vehicle drive axle protection, if it is monitored that the accelerator pedal depth reaches the depth threshold, obtaining the real-time torque value of the target vehicle;

[0122] When the real-time torque value is monitored to be less than the expected threshold, the exit protection timer is started and the exit protection timing is performed. When the exit protection timing reaches a preset first timing threshold, a vehicle drive axle protection closing instruction is sent to the drive motor, and the exit protection timer is reset;

[0123] monitoring the real-time torque in real time, and when the real-time torque is greater than the expected torque, starting a protection timer and performing protection timing, and when the protection timing reaches a preset second timing threshold, sending a vehicle drive axle protection start instruction to the drive motor, and resetting the protection timer;

[0124] After sending the vehicle drive axle protection start instruction to the drive motor again, the driving state of the target vehicle is determined by using a preset speed comparison rule; wherein the driving state includes a normal driving state and an abnormal driving state;

[0125] If it is determined that the driving state is an abnormal driving state, a command to close the vehicle drive axle protection is sent to the drive motor.

[0126] In some embodiments, a vehicle drive axle protection automatic control method can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on the electronic device 10 via the ROM 12 and / or the communication unit 19. When the computer program is loaded into the RAM 13 and executed by the processor 11, one or more steps of the vehicle drive axle protection automatic control method described above can be performed. Alternatively, in other embodiments, the processor 11 can be configured to execute a vehicle drive axle protection automatic control method in any other appropriate manner (for example, by means of firmware).

[0127] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0128] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0129] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0130] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0131] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0132] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0133] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0134] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle drive axle protection automatic control method, executed by a vehicle controller, characterized in that: include: When the target vehicle is in a starting state, the accelerator pedal depth of the target vehicle is obtained in real time. If the accelerator pedal depth does not reach a depth threshold, a vehicle drive axle protection instruction is sent to the drive motor, and the accelerator pedal depth is continuously monitored; After sending the instruction to start the vehicle drive axle protection, if it is monitored that the accelerator pedal depth reaches the depth threshold, obtaining the real-time torque value of the target vehicle; When the real-time torque value is monitored to be less than the expected threshold, the exit protection timer is started and the exit protection timing is performed. When the exit protection timing reaches a preset first timing threshold, a vehicle drive axle protection closing instruction is sent to the drive motor, and the exit protection timer is reset; monitoring the real-time torque in real time, and when the real-time torque is greater than the expected torque, starting a protection timer and performing protection timing, and when the protection timing reaches a preset second timing threshold, sending a vehicle drive axle protection start instruction to the drive motor, and resetting the protection timer; After sending the vehicle drive axle protection start instruction to the drive motor again, the driving state of the target vehicle is determined by using a preset speed comparison rule; wherein the driving state includes a normal driving state and an abnormal driving state; If it is determined that the driving state is an abnormal driving state, a command to close the vehicle drive axle protection is sent to the drive motor.

2. The method according to claim 1, characterized in that The driving state of the target vehicle is determined using a preset speed comparison rule, including: Acquire a current speed value of the target driving vehicle corresponding to the real-time torque value, and compare the current speed value with a preset expected speed value; If the current speed value is greater than or equal to the expected speed value, it is determined that the target vehicle is in a normal driving state; otherwise, it is determined that the target vehicle is in a state to be accelerated; When it is determined that the target vehicle is in a state to be accelerated, the cycle time closest to the acquisition time of the current speed value is obtained, and the target cycle speed value at the cycle time is obtained; wherein the vehicle controller collects the cycle speed value according to a preset cycle; If the current speed value is less than or equal to the target cycle speed value, it is determined that the target vehicle is in an abnormal driving state; If the current speed value is greater than the sum of the target period speed value and the preset step length, it is determined that the target vehicle is in a normal driving state; If the current speed value is less than or equal to the sum of the target cycle speed value and the preset step size, and the current speed value is greater than the target cycle speed value, the driving state of the target vehicle is jointly determined based on multiple cycle speed values ​​at multiple cycle moments.

3. The method according to claim 2, characterized in that If the current speed value is less than or equal to the sum of the target cycle speed value and the preset step length, and the current speed value is greater than the target cycle speed value, the driving state of the target vehicle is jointly determined according to multiple cycle speed values ​​at multiple cycle moments, including: If the current speed value is less than or equal to the sum of the target cycle speed value and the preset step length, and the current speed value is greater than the target cycle speed value, then after initializing the preset pedometer, the pedometer is incremented by 1; After obtaining a new target periodic speed value again at a new periodic moment, re-determine whether the current speed value is less than or equal to the sum of the target periodic speed value and the preset step length, and whether the current speed value is greater than the target periodic speed value; If it is determined that the condition is met, the pedometer is incremented by 1, and it is determined whether the current step count value in the pedometer is greater than the preset count value; If yes, it is determined that the driving state of the target vehicle is an abnormal driving state; otherwise, it returns to execute the operation of obtaining a new target cycle speed value again at a new cycle time; If it is determined that the condition is not met, the target vehicle is determined to be in a normal driving state.

4. The method according to claim 2, characterized in that: Before comparing the current rotation speed value with the corresponding expected rotation speed value, the method further includes: Real-time detection of the brake pedal status; If it is detected that the brake pedal is not effective, the expected speed value is determined as the target speed corresponding to the current accelerator pedal depth; If it is detected that the brake pedal is effective, the expected rotation speed value is determined to be 0.

5. The method according to any one of claims 1 to 4, characterized in that: in, The vehicle drive axle protection activation instruction is used to instruct the drive motor to set the maximum output torque to a first output torque corresponding to the rated stress of the drive axle; The vehicle drive axle protection shutdown instruction is used to instruct the drive motor to set the maximum output torque to a second output torque corresponding to the maximum stress borne by the drive axle; wherein the first output torque is smaller than the second output torque.

6. The method according to claim 5, characterized in that The method further comprises: When the target vehicle has completed starting and is in a normal driving state, the real-time output torque of the drive motor is continuously monitored, and when the real-time output torque is greater than the first output torque corresponding to the rated stress of the drive axle, the first protection timing is started; When the first protection timing reaches the first protection threshold, a vehicle drive axle protection start instruction is sent to the drive motor, and a second protection timing is started; When the second protection timing reaches the second protection threshold, the driving state of the target vehicle is judged, and if it is in an abnormal driving state, a command to close the vehicle drive axle protection is sent to the drive motor.

7. A vehicle drive axle protection automatic control device, arranged in a vehicle controller, characterized in that: include: A first accelerator pedal monitoring module is used to obtain the accelerator pedal depth of the target vehicle in real time when the target vehicle is in a starting state, and if the accelerator pedal depth does not reach a depth threshold, send a vehicle drive axle protection start instruction to the drive motor, and continuously monitor the accelerator pedal depth; A second accelerator pedal monitoring module is used to obtain a real-time torque value of a target vehicle if it is monitored that the accelerator pedal depth reaches a depth threshold after sending a command to start the vehicle drive axle protection; An exit protection timing module is used to start an exit protection timer and perform exit protection timing when the real-time torque value is monitored to be less than the expected threshold value, and when the exit protection timing reaches a preset first timing threshold value, send a vehicle drive axle protection closing instruction to the drive motor and reset the exit protection timer; A protection timing module, for real-time monitoring of the real-time torque, and when the real-time torque is greater than the expected torque, starting a protection timer and performing protection timing, and sending a vehicle drive axle protection start instruction to the drive motor when the protection timing reaches a preset second timing threshold; A driving state judgment module is used to determine the driving state of the target vehicle by using a preset speed comparison rule after sending a command to start the vehicle drive axle protection to the drive motor again; wherein the driving state includes a normal driving state and an abnormal driving state; The protection closing module is used to send a vehicle drive axle protection closing instruction to the drive motor if it is determined that the driving state is an abnormal driving state.

8. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute a vehicle drive axle protection automatic control method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement a vehicle drive axle protection automatic control method according to any one of claims 1 to 6 when executed.

10. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the computer program implements a vehicle drive axle protection automatic control method according to any one of claims 1 to 6.

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