Method and device for detecting differential in vehicle, electronic equipment and readable storage medium

Abstract

The application discloses a kind of detection method, device, electronic equipment and readable storage medium of differential mechanism in vehicle.The method comprises: obtaining the operating state signal of disconnecting component of differential mechanism in vehicle;Based on operating state signal, determine the target response duration of disconnecting component executes target type operation, wherein, target type operation is one of connecting operation and disconnecting operation, connecting operation is used to control motor and power system to establish power connection, disconnecting operation is used to control motor and power system to disconnect power connection;Based on target response duration and the reference response duration corresponding to target type operation, determine the working state of differential mechanism, wherein, working state is used to indicate whether differential mechanism exists fault;In response to working state indicating that differential mechanism exists fault, generate early warning information, wherein, early warning information is used to at least indicate to maintain differential mechanism.The application solves the technical problem that differential mechanism in vehicle cannot be detected in time.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more specifically, to a method, apparatus, electronic device, and readable storage medium for detecting a vehicle's differential. Background Technology

[0002] With the rapid development of electric vehicle technology, the differential, as one of the core components of the vehicle's electric drive system, is becoming increasingly important. The differential can dynamically adjust power distribution under different driving conditions, improving energy efficiency and vehicle handling performance. However, the accuracy and reliability of the differential are crucial to the overall performance of the electric drive system.

[0003] In related technologies, differential fault diagnosis mainly relies on post-fault detection, that is, the fault identification process is only initiated when the vehicle exhibits obvious drive abnormalities or abnormal energy consumption. This delayed diagnostic mechanism not only reduces the availability and safety of the vehicle, but may also lead to further deterioration of the fault and increase maintenance costs.

[0004] There is currently no effective solution to the aforementioned technical problem of the inability to detect differential faults in vehicles in a timely manner. Summary of the Invention

[0005] This application provides a method, apparatus, electronic device, and readable storage medium for detecting vehicle center differentials, so as to at least solve the technical problem of being unable to detect vehicle center differential faults in a timely manner.

[0006] According to one aspect of the embodiments of this application, a method for detecting a vehicle center differential is provided, the vehicle center differential including a disconnection component. The method includes: acquiring an operation status signal of the disconnection component, wherein the operation status signal characterizes the power connection status between a vehicle motor and a vehicle powertrain; determining a target response duration for the disconnection component to perform a target type operation based on the operation status signal, wherein the target type operation is either a connection operation or a disconnection operation, the connection operation controlling the motor to establish a power connection with the powertrain, and the disconnection operation controlling the motor to disconnect the power connection with the powertrain; determining a working state of the differential based on the target response duration and a reference response duration corresponding to the target type operation, wherein the working state indicates whether a fault exists in the differential; and generating a warning message in response to the working state indicating a fault in the differential, wherein the warning message at least indicates that the differential needs maintenance.

[0007] Optionally, based on the operation status signal, determining the target response duration for the disconnect component to perform the target type operation includes: determining a first target response duration for the disconnect component to perform the connection operation based on the operation status signal, wherein the first target response duration is used to characterize the time from when the disconnect component receives the connection command to when the motor and the power system establish a connection; or, based on the operation status signal, determining a second target response duration for the disconnect component to perform the disconnect operation, wherein the second target response duration is used to characterize the time from when the disconnect component receives the disconnect command to when the motor and the power system disconnect.

[0008] Optionally, the operating state of the differential is determined based on the target response duration and the reference response duration corresponding to the target type operation, including: in response to the target type operation being a connection operation, the operating state of the differential is determined based on the first target response duration and the first reference response duration corresponding to the connection operation; or, in response to the target type operation being a disconnect operation, the operating state of the differential is determined based on the second target response duration and the second reference response duration corresponding to the disconnect operation.

[0009] Optionally, the differential's operating state is determined based on the first target response duration and the first reference response duration corresponding to the connection operation, including: in response to the difference between the first target response duration and the first reference response duration being greater than a first difference threshold, determining the first number of times the difference between the first target response duration and the first reference response duration is greater than the first difference threshold based on the operation status signal of the disconnection component within a preset time period; and in response to the first number being greater than a preset value, determining that the differential's operating state indicates a differential malfunction.

[0010] Optionally, the differential's operating state is determined based on the second target response duration and the second reference response duration corresponding to the disconnection operation, including: in response to the difference between the second target response duration and the second reference response duration being greater than a second difference threshold, determining a second number of times the difference between the second target response duration and the second reference response duration is greater than the second difference threshold based on the operation status signal of the disconnection component within a preset time period; and in response to the second number being greater than a preset value, determining that the differential's operating state indicates a differential fault.

[0011] Optionally, the method for detecting the differential in the vehicle further includes: in response to a target type operation being a disconnection operation, acquiring a torque change signal of the motor, wherein the torque change signal is used to characterize the torque change of the motor after receiving the disconnection command; in response to a torque change value corresponding to the torque change signal being greater than a first torque change threshold, generating first warning information, wherein the first warning information is used to at least indicate disconnecting the power connection between the motor and the power system; and in response to a torque change value corresponding to the torque change signal being greater than a second torque change threshold, generating second warning information, wherein the second warning information is used to at least indicate triggering the vehicle to perform a parking operation.

[0012] Optionally, the detection method for the vehicle's differential further includes: obtaining the connection duration corresponding to multiple connection operations performed by the disconnection component within a historical time period, thus obtaining multiple connection durations; based on the connection process of the multiple connection operations, dividing the multiple connection durations into a first duration, a second duration, and a third duration; based on the weight coefficients corresponding to the first duration, the second duration, and the third duration, performing a weighted average of the first duration, the second duration, and the third duration, respectively, to obtain multiple connection response durations; extracting connection response duration features from the multiple connection response durations, wherein the connection response duration features are used to characterize the stability of the disconnection component when performing connection operations; determining an initial baseline connection response duration based on the connection response duration features; determining a first correction coefficient to correct the initial baseline connection response duration based on the vehicle model and the vehicle's environmental information; and correcting the initial baseline connection response duration based on the first correction coefficient to obtain a first baseline response duration.

[0013] Optionally, the detection method for the vehicle's differential further includes: obtaining the disconnection duration corresponding to multiple disconnection operations performed by the disconnection component within a historical time period, thus obtaining multiple disconnection durations; dividing the multiple disconnection durations into a fourth duration, a fifth duration, and a sixth duration based on the disconnection process of the multiple disconnection operations; performing a weighted average of the fourth duration, the fifth duration, and the sixth duration based on the weight coefficients corresponding to the fourth duration, the fifth duration, and the sixth duration, thus obtaining multiple disconnection response durations; extracting disconnection response duration features from the multiple disconnection response durations, wherein the disconnection response duration features are used to characterize the stability of the disconnection component when performing a disconnection operation; determining an initial baseline disconnection response duration based on the disconnection response duration features; determining a second correction coefficient to correct the initial baseline disconnection response duration based on the vehicle model and the vehicle's environmental information; and correcting the initial baseline disconnection response duration based on the second correction coefficient to obtain a second baseline response duration.

[0014] According to another aspect of the embodiments of this application, a detection device for a vehicle center differential is also provided. The vehicle center differential includes a disconnection component. The device includes: an acquisition unit, configured to acquire an operation status signal of the disconnection component, wherein the operation status signal is used to characterize the power connection status between the vehicle's motor and the vehicle's power system; a first determination unit, configured to determine a target response time for the disconnection component to perform a target type operation based on the operation status signal, wherein the target type operation is either a connection operation or a disconnection operation, the connection operation being used to control the motor to establish a power connection with the power system, and the disconnection operation being used to control the motor to disconnect the power connection with the power system; a second determination unit, configured to determine the operating state of the differential based on the target response time and a reference response time corresponding to the target type operation, wherein the operating state is used to indicate whether a fault exists in the differential; and a generation unit, configured to generate warning information in response to the operating state indicating that a fault exists in the differential, wherein the warning information is used to at least indicate that the differential needs maintenance.

[0015] According to another aspect of the embodiments of this application, an electronic device is also provided, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the vehicle differential detection method in various embodiments of this application when it runs.

[0016] According to another aspect of the embodiments of this application, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the computer-readable storage medium is located to execute the vehicle differential detection method of various embodiments of this application.

[0017] According to another aspect of the embodiments of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the vehicle differential detection method in various embodiments of this application.

[0018] According to another aspect of the embodiments of this application, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program, which, when executed by a processor, implements the vehicle differential detection method in various embodiments of this application.

[0019] According to another aspect of the embodiments of this application, a computer program is also provided, which, when executed by a processor, implements the vehicle differential detection method in various embodiments of this application.

[0020] In this embodiment, an operation status signal of the disconnection component is acquired, wherein the operation status signal is used to characterize the power connection status between the vehicle's motor and the vehicle's power system; based on the operation status signal, a target response time for the disconnection component to perform a target type operation is determined, wherein the target type operation is either a connection operation or a disconnection operation, wherein the connection operation is used to control the motor to establish a power connection with the power system, and the disconnection operation is used to control the motor to disconnect the power connection with the power system; based on the target response time and the reference response time corresponding to the target type operation, the operating state of the differential is determined, wherein the operating state is used to indicate whether the differential is faulty; in response to the operating state indicating that the differential is faulty, a warning message is generated, wherein the warning message is used to at least indicate that the differential needs to be repaired. In other words, in this embodiment of the application, by real-time detection of the operation status signal of the disconnection component in the differential, it is possible to quickly identify whether the response time of the disconnection component performing the connection or disconnection operation meets the normal response benchmark. Once it is detected that the response time of the disconnection component deviates from the preset requirements, an early warning message is immediately generated to remind the vehicle manager or user to repair the differential in a timely manner. This effectively prevents the occurrence of serious faults, improves the safety and operating efficiency of the vehicle, and enables early warning to be issued in the early stage of the fault. This avoids the situation in traditional methods where the fault is only detected when it has deteriorated to an obvious stage, thereby solving the technical problem in related technologies that it is impossible to detect differential faults in vehicles in a timely manner. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0022] Figure 1 This is a flowchart of a method for detecting a vehicle differential according to an embodiment of this application;

[0023] Figure 2 This is a schematic diagram of a vehicle differential detection system according to an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of a differential engagement response process according to an embodiment of this application;

[0025] Figure 4 This is a schematic diagram of a differential disconnection response process according to an embodiment of this application;

[0026] Figure 5 This is a flowchart of an online early warning method based on response duration characteristics according to an embodiment of this application;

[0027] Figure 6This is a flowchart of an online early warning method for abnormal mechanical connection features according to an embodiment of this application;

[0028] Figure 7 This is a schematic diagram of a vehicle differential detection device according to an embodiment of this application. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] According to an embodiment of this application, an embodiment of a method for detecting a differential in a vehicle is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0032] In four-wheel drive electric vehicles, the disconnectable differential is a crucial component, used to dynamically adjust power distribution according to driving conditions, enabling the disconnection and restoration of power connection between the front or rear wheels. As the core part of the differential, the operating status of the disconnectable component directly affects the stability and efficiency of the electric drive system. However, the disconnectable component may encounter various faults during long-term operation, such as mechanical wear, electronic signal interference, and control failure. If these are not detected and addressed in a timely manner, they will seriously affect the vehicle's performance and safety. Therefore, this application proposes a detection method for the differential in a vehicle, which can accurately assess the health status of the disconnectable component in the differential in real time, provide timely warnings of potential faults, ensure the safe and efficient operation of the electric drive system and the entire vehicle, and provide users with a worry-free driving experience.

[0033] Figure 1 This is a flowchart of a method for detecting a vehicle center differential according to an embodiment of this application, wherein the vehicle center differential includes a disconnect component, such as... Figure 1 As shown, the method includes the following steps:

[0034] Step S101: Obtain the operation status signal of the disconnected component.

[0035] In the technical solution provided in step S101 of this application, the differential can be a disconnectable differential, which achieves dynamic control of the transmission connection through a mechanical structure. The disconnectable differential includes the following key components: a disconnect assembly (also called a disconnect mechanism), a position sensor, a differential controller, and a rotary transformer. The disconnect assembly is the core part of the disconnectable differential, responsible for dynamically controlling the disconnection and connection of power according to electronic control signals, ensuring the rationality and efficiency of power transmission under different driving conditions. The disconnect assembly typically includes a jaw clutch, a drive mechanism, and other control elements to achieve engagement and disengagement functions. The jaw clutch is an important component of the disconnect assembly, interacting with the drive mechanism through its teeth to achieve power switching. When the jaw clutch is fully engaged with the pawl of the drive mechanism, power is transmitted; conversely, when they are separated, power is disconnected. The drive mechanism is responsible for driving the jaw clutch, using electromagnetic action or other power sources to cause the jaw clutch to engage or disengage. The drive mechanism includes components such as coils, springs, and pawls. When the coil is energized, it generates a magnetic field that moves the pawls, overcoming the spring force and thus controlling the jaw clutch. Position sensors are used to monitor changes in the position of the jaw clutches or drive mechanism in real time, feeding the data back to the controller. They are crucial sensors ensuring the correct engagement and disengagement of the disconnect assembly. The differential controller receives engagement or disengagement commands from the vehicle control system and sends control signals to the disconnect assembly via the Controller Area Network (CAN) bus. It also receives status feedback from the disconnect assembly, serving as the logic and control center. A resolver, installed in the electric drive assembly, is used to monitor the motor's speed and torque in real time, especially after a disconnection operation. By monitoring changes in motor torque, it determines whether the mechanical connection status of the disconnect assembly is normal.

[0036] In this embodiment, the operation status signal of the disconnect component in the differential is acquired. This operation status signal is used to characterize the power connection status between the vehicle's motor and the vehicle's power system, and is key to assessing whether the differential is faulty.

[0037] For example, because the differential controller maintains close communication with the drive mechanism of the disconnect component, it can receive various signals from the disconnect component in real time. Simultaneously, to ensure data accuracy and timeliness, a synchronous acquisition architecture is adopted, and a timestamp system is established to ensure that the time coordinates of all signal acquisition and processing are consistent. This is crucial for analyzing the entire process from command issuance to response completion. Based on this, the differential controller can acquire the operating status signals of the disconnect component, which may include, but are not limited to: control command signals, drive current signals, position sensor signals, actual speed and torque signals, and on / off status signals. Among them, the control command signal is the engagement or disengagement command issued by the vehicle's control unit to the disconnect assembly, reflecting the current desired operating state of the differential; the drive current signal is used to indicate the change in current in the differential's drive assembly when the disconnect assembly receives the engagement or disengagement command, which can indirectly reflect the force and speed of the action; the position sensor signal is used to detect the position changes of key components (such as the jaw clutch) in the disconnect assembly, which is an important basis for judging whether the disconnect assembly accurately executes the command; the actual speed and torque signal is the actual speed and torque of the motor detected in real time by the rotary transformer built into the electric drive assembly. Especially after the disconnection operation, the change in motor torque can reveal whether the mechanical connection status of the disconnect assembly is normal; the on / off status signal is used to reflect the current power transmission status of the differential, confirming whether a correct power connection has been established between the vehicle's motor and the power system.

[0038] Optionally, the acquired operation status signals are not used directly for fault diagnosis, but are preprocessed first, such as signal filtering and outlier removal, to improve data quality.

[0039] Optionally, by acquiring the operational status signals of the disconnected components in real time, a detailed operational log can be established, providing foundational data for subsequent feature processing and trend judgment modules. This data not only includes immediate feedback on the tasks performed by the disconnected components but also helps build an intelligent model for early fault warning, thereby issuing warnings in the early stages of fault development, avoiding potentially serious consequences, and ensuring the smooth operation of the vehicle.

[0040] Step S102: Based on the operation status signal, determine the target response time for the disconnect component to perform the target type operation.

[0041] In the technical solution provided by step S102 of this application, the target type operation is one of connection operation and disconnection operation. The connection operation is used to control the motor to establish a power connection with the power system. The connection operation can also be called a coupling operation. The disconnection operation is used to control the motor to disconnect the power connection with the power system.

[0042] In this embodiment, after obtaining the operation status signal, the target response time of the disconnection component when performing a connection operation or a disconnection operation can be calculated based on the operation status signal, that is, the actual response time.

[0043] Optionally, as described in step S101 above, the operating status signals include: control command signals, drive current signals, position sensor signals, actual speed and torque signals, and on / off status signals. When the differential controller receives a connection command or a disconnect command, it starts timing and accurately records the time consumed from the arrival of the command signal to the start of action of the disconnect component, and from the start of action to the final feedback of the engagement or disconnection state, i.e., the target response time. If the command signal is a connection command, the obtained target response time is recorded as the first target response time (…). The first target response time reflects the actual reaction speed and efficiency of the disconnected component performing the connection operation in the current state. If the command signal is a disconnect command, the obtained target response time is recorded as the second target response time. The second target response time reflects the actual response speed and efficiency of the disconnect component performing the disconnect operation in the current state.

[0044] In this step, based on the operation status signal, the actual response time characteristics when the disconnection component performs connection or disconnection operations can be obtained. This is an important indicator for assessing its health status and functional performance, providing a direct basis for subsequent fault warnings, helping to detect potential anomalies early and avoid the impact of disconnection component failure on vehicle safety and operating efficiency.

[0045] Step S103: Determine the operating state of the differential based on the target response time and the baseline response time corresponding to the target type operation.

[0046] In the technical solution provided in step S103 of this application, the reference response time corresponding to the target type operation is the reference response time of the connection and disconnection operations determined by collecting a large number of response times under normal operation during the early operation phase of the vehicle and performing statistical analysis (e.g., extracting the mode). As can be seen from the foregoing, the target type operation is either a connection operation or a disconnection operation. Based on this, the reference response time corresponding to the connection operation can be recorded as the first reference response time ( The first reference response time is used to characterize the reference time for disconnecting a component to perform a connection operation under standard operating conditions. The reference response time corresponding to the disconnection operation is denoted as the second reference response time. The second reference response time is used to characterize the reference time for the disconnect component to perform a disconnect operation under standard operating conditions. The above-mentioned differential operating status is used to indicate whether there is a fault in the differential.

[0047] In this embodiment, after obtaining the target response duration, if the target response duration is the first target response duration corresponding to the connection operation, the first target response duration can be compared with the first reference response duration to obtain a first comparison result. Then, based on the first comparison result, the difference between the first target response duration and the first reference response duration (e.g., ...) is determined. This difference reflects the deviation of the response time of the disconnected component performing a connection operation under the current operating condition from the standard response time; that is, the offset. This difference ( ) and the first difference threshold ( By comparing the values, it can be determined whether there are any abnormalities in the disconnection component when performing the connection operation. The first difference threshold defines the boundary between normal fluctuations and abnormal situations in the response time of the disconnection component during the connection operation. For example, when the difference exceeds the first difference threshold, it is determined that the disconnection component has an abnormality or failure risk during the connection operation. This first difference threshold is set to avoid unnecessary alarms caused by slight fluctuations, while ensuring timely response when the disconnection component's performance significantly degrades or fails.

[0048] Optionally, if the target response duration is the first target response duration corresponding to the connection operation, the second target response duration can be compared with the second baseline response duration to obtain a second comparison result. After obtaining the second comparison result, the difference between the second target response duration and the second baseline response duration can be determined based on the second comparison result (e.g., This difference reflects the deviation of the disconnection component's response time during the current operating condition from the standard response time; that is, the offset. This difference ( ) and the second difference threshold ( By comparing the two values, it can be determined whether there are any abnormalities in the disconnection component when performing the disconnection operation. The second difference threshold defines the boundary between normal fluctuations and abnormal situations in the response time of the disconnection component during the disconnection operation. For example, when the difference exceeds the second difference threshold, it is determined that the disconnection component has an abnormality or failure risk during the disconnection operation. Similar to the first difference threshold, the second difference threshold is set to avoid unnecessary alarms caused by slight fluctuations, while ensuring timely response when the disconnection component's performance significantly degrades or fails.

[0049] Optionally, if the offset of the target response time for disconnecting the component during a connection or disconnection operation exceeds a set threshold, and this exceeding of the threshold occurs more than a preset number of times (e.g., 3 times) within a certain period of time, then it is determined that the disconnecting component is abnormal, that is, the differential is faulty. Using the preset number of times as the judgment standard can avoid misjudgment.

[0050] In this step, by comparing and analyzing the target response time with the baseline response time, not only is real-time monitoring of the differential's operating status achieved, but also potential fault risks can be warned in a timely manner based on data change trends.

[0051] Step S104: In response to the operating status indicating a differential fault, a warning message is generated.

[0052] In the technical solution provided in step S104 of this application, when an abnormal or deviated operating state of the differential disconnect component is detected, it can be determined that the differential's operating state indicates a fault. In this case, a warning message can be generated. This warning message not only indicates a potential fault in the disconnect component but also indicates the need for differential repair, thereby providing timely and effective guidance for vehicle maintenance and ensuring stable vehicle operation and driving safety. For example, it provides immediate operational suggestions for disconnecting the auxiliary drive motor and reminders for differential repair to prevent further deterioration of the fault.

[0053] In this embodiment, a multi-level alarm mechanism can be set based on the magnitude of the response time offset. This allows for different response measures to be taken according to the severity of the fault, effectively improving vehicle safety and maintenance efficiency. For example, a first-level warning message could be "disconnect auxiliary drive + maintenance reminder," while a second-level warning message could be "safe stop + initiate rescue." The warning information can be quickly conveyed to the driver through the in-vehicle infotainment system, instrument panel, or other communication devices, and simultaneously sent to the vehicle maintenance center to ensure timely response and handling of the fault.

[0054] Through steps S101 to S104 above, by real-time detection of the operation status signal of the disconnection component in the differential, it is possible to quickly identify whether the response time of the disconnection component performing connection or disconnection operations meets the normal response benchmark. Once it is detected that the response time of the disconnection component deviates from the preset requirements, an early warning message is immediately generated to remind the vehicle manager or user to repair the differential in a timely manner. This effectively prevents the occurrence of serious faults, improves the safety and operating efficiency of the vehicle, and enables early warning to be issued in the early stage of the fault. This avoids the situation in traditional methods where the fault is detected only when it has deteriorated to an obvious stage, thereby solving the technical problem of not being able to detect differential faults in vehicles in a timely manner in related technologies.

[0055] The method described in this embodiment will be further described below.

[0056] As an optional implementation, step S102, based on the operation status signal, determines the target response duration for the disconnect component to perform the target type operation, including: based on the operation status signal, determining a first target response duration for the disconnect component to perform the connection operation, wherein the first target response duration is used to characterize the time from when the disconnect component receives the connection command to when the motor and the power system establish a connection; or, based on the operation status signal, determining a second target response duration for the disconnect component to perform the disconnect operation, wherein the second target response duration is used to characterize the time from when the disconnect component receives the disconnect command to when the motor and the power system disconnect.

[0057] In this embodiment, if the target type operation is a connection operation, the response time of the disconnected component during the execution of the connection operation can be detected based on the operation status signal to obtain the first target response time of the disconnected component performing the connection operation.

[0058] For example, the connection command received by the differential controller indicates that the differential is about to perform the operation of establishing a connection between the motor and the power system. Afterwards, the entire process is monitored from the arrival of the connection command on the CAN bus until the drive mechanism begins to overcome the spring force and actuate, and from the actuation of the drive mechanism until the disconnection component reports a successful connection. This series of time measurements includes, but is not limited to, the first time from the arrival of the connection command to the start of current change. The second duration from the change in current to the first action of the mechanical structure And the third time interval from the first movement of the mechanical structure to connection confirmation. These durations together constitute the first target response duration of the connection operation, which determines the actual response speed and efficiency of the disconnect component in performing the connection operation.

[0059] Optionally, after obtaining the first duration Second duration And the third duration Then, the weighting coefficients corresponding to these three durations can be determined. For example, the first duration... Corresponding to the first weight coefficient Second duration Corresponding to the second weighting coefficient The third duration Corresponding third weight coefficient Then, according to the weighting coefficients corresponding to the three durations, a weighted average is calculated on the three durations to obtain the first target response duration. The calculation process of this weighted average can be expressed by the following formula.

[0060]

[0061] Optionally, if the target type operation is a disconnect operation, the response time of the disconnect component during the execution of the disconnect operation can be detected based on the operation status signal to obtain the second target response time of the disconnect component executing the disconnect operation.

[0062] For example, a disconnect command received by the differential controller indicates that the differential is about to disconnect the motor from the powertrain. Then, the entire process is monitored from the moment the disconnect command arrives on the CAN bus until the drive mechanism overcomes the spring force and actuates, and from the moment the drive mechanism actuates until the disconnect component reports successful disconnection. This series of time measurements includes, but is not limited to, the fourth time interval from the arrival of the disconnection quality until the current returns to zero. The fifth time interval from when the current returns to zero to when the mechanical structure first operates. And the sixth time interval from the first movement of the mechanical structure to the confirmation of disconnection. These durations together constitute the second target response duration of the disconnection operation, which reflects the actual response speed and efficiency of the disconnection component in performing the disconnection operation.

[0063] Optionally, upon obtaining the fourth duration Fifth duration And the sixth duration Then, the weighting coefficients corresponding to these three durations can be determined. For example, the fourth duration... Corresponding to the fourth weighting coefficient Fifth duration Corresponding to the second weighting coefficient The sixth duration Corresponding to the sixth weight coefficient Then, according to the weighting coefficients corresponding to the three durations, a weighted average is calculated on the three durations to obtain the second target response duration. The calculation process of this weighted average can be expressed by the following formula.

[0064]

[0065] Optionally, regardless of the first target response time Or is it the second target response time? These are all important indicators for evaluating the response speed of a disconnected component when performing a specific operation, and are directly related to the health status and functional performance of the disconnected component.

[0066] As an optional implementation, step S103, determining the operating state of the differential based on the target response duration and the reference response duration corresponding to the target type operation, includes: in response to the target type operation being a connection operation, determining the operating state of the differential based on the first target response duration and the first reference response duration corresponding to the connection operation; or, in response to the target type operation being a disconnect operation, determining the operating state of the differential based on the second target response duration and the second reference response duration corresponding to the disconnect operation.

[0067] In this embodiment, after determining the target response time of the target type operation (connection operation or disconnection operation), the target response time can be compared with the pre-calculated baseline response time corresponding to the target type operation to evaluate whether the differential is working properly, and thus promptly detect any possible faults or abnormalities.

[0068] Optionally, when the target type operation is a connection operation, the first target response time for the component to perform the connection operation will be interrupted. ) and the first reference response time corresponding to the connection operation ( A comparative analysis was conducted. Among them, the first baseline response time ( The value is derived from statistical analysis of a large amount of actual operating data in the early stages of vehicle operation, and represents the standard response time of connection operation under normal conditions.

[0069] For example, the response time of the first target can be calculated using the following formula ( ) and the first reference response time ( The difference between () This difference reflects the degree of deviation between the actual response time of the current connection operation and the normal baseline response time.

[0070]

[0071] Optionally, for disconnection operations, the same method can be used to specify the second target response time for the disconnection component to perform the disconnection operation. The second baseline response time corresponding to the disconnection operation () A comparative analysis was conducted. Among them, the second baseline response time ( The value is derived from statistical analysis of a large amount of actual operating data in the early stages of vehicle operation, and represents the standard response time of disconnection operation under normal conditions.

[0072] For example, the response time of the second objective can be calculated using the following formula ( ) and the second baseline response time ( The difference between () This difference reflects the degree of deviation between the actual response time of the current disconnection operation and the normal baseline response time.

[0073]

[0074] In this step, by monitoring the target response time in real time and comparing it with the baseline response time, abnormal changes in the efficiency of disconnecting components can be detected in a timely manner, which ensures the timeliness of fault warning.

[0075] As an optional implementation, the differential's operating state is determined based on the first target response duration and the first reference response duration corresponding to the connection operation, including: in response to the difference between the first target response duration and the first reference response duration being greater than a first difference threshold, determining a first number of times the difference between the first target response duration and the first reference response duration is greater than the first difference threshold based on the operation status signal of the disconnection component within a preset time period; and in response to the first number being greater than a preset value, determining that the differential's operating state indicates a differential malfunction.

[0076] In this embodiment, the difference between the first target response duration and the first reference response duration is obtained through the above steps. After that, the difference can be compared with the first difference threshold ( ) are compared to determine whether the difference deviates from the normal range, where the first difference threshold ( The threshold is set based on historical data and the design characteristics of disconnected components, and is used to define the boundary between normal connection operation and fault state.

[0077] Optionally, if the difference ( ) greater than the first difference threshold ( This indicates that the response time of the disconnecting component during the reconnection operation significantly deviates from the normal range, potentially indicating an anomaly. Therefore, to avoid misjudgment, further monitoring can be conducted over a preset time period to track the difference ( ) when the component disconnects and performs the reconnection operation. Exceeding the first difference threshold ( The system counts the number of events (e.g., 3 times) and records this count as the first count. If the first count exceeds a preset value (e.g., 3 times), the differential's operating state is deemed abnormal, indicating a differential malfunction. The preset time period can be adjusted based on actual conditions and is not specifically limited here. The preset value is chosen based on engineering experience and fault statistics, aiming to balance the timeliness of the warning and reduce the possibility of false alarms.

[0078] In this step, real-time monitoring and statistical analysis can accurately capture abnormal changes in the response time of the disconnecting component during connection operations, promptly locate the faulty speed cut-off device, prevent further deterioration of the fault, and ensure the smoothness and efficiency of vehicle power output. Setting a first difference threshold allows monitoring to be initiated when a slight abnormality occurs in the response time of the disconnecting component. By statistically analyzing the first count and setting a preset value, false alarms due to a single abnormal response are reduced, improving the accuracy and reliability of fault warnings.

[0079] As an optional implementation, the differential's operating state is determined based on the second target response duration and the second reference response duration corresponding to the disconnection operation. This includes: in response to the difference between the second target response duration and the second reference response duration being greater than a second difference threshold, determining a second number of times the difference between the second target response duration and the second reference response duration is greater than the second difference threshold based on the operation status signal of the disconnection component within a preset time period; and in response to the second number being greater than a preset value, determining that the differential's operating state indicates a differential malfunction.

[0080] In this embodiment, the difference between the second target response duration and the second reference response duration is obtained through the aforementioned steps. After that, the difference can be compared with the second difference threshold ( The difference is compared to determine whether it deviates from the normal range, where the second difference threshold ( The threshold is set based on historical data and the design characteristics of the disconnect component, and is used to define the boundary between normal disconnection operation and fault state.

[0081] Optionally, if the difference ( ) greater than the second difference threshold ( This indicates that the response time of the disconnect component performing the disconnect operation deviates significantly from the normal range, potentially indicating an anomaly. Therefore, to avoid misjudgment, further monitoring can be conducted over a preset time period to track the difference ( ) when the disconnect component performs the disconnect operation. Exceeding the second difference threshold ( The system counts the number of events (e.g., 3 times) and records this count as the second count. If the second count exceeds a preset value (e.g., 3 times), the differential's operating state is deemed abnormal, indicating a differential malfunction. The preset time period can be adjusted based on actual conditions and is not specifically limited here. The preset value is chosen based on engineering experience and fault statistics, aiming to balance the timeliness of the warning and reduce the possibility of false alarms.

[0082] In this step, by comparing and analyzing the response time of the second target with that of the second baseline, and combining this with the statistics of the number of abnormal responses, comprehensive monitoring and fault warning of the differential's operating status during the disconnection operation are achieved. Based on the statistics of the number of abnormal responses, not only can misjudgments be avoided, but the cumulative number of occurrences can also clarify the frequency and severity of faults, providing data support for subsequent maintenance and replacement decisions.

[0083] As an optional implementation, the method for detecting the differential in the vehicle further includes: acquiring a torque change signal of the motor in response to a target type operation being a disconnection operation, wherein the torque change signal is used to characterize the torque change of the motor after receiving the disconnection command; generating first warning information in response to a torque change value corresponding to the torque change signal being greater than a first torque change threshold, wherein the first warning information is used to at least indicate disconnecting the power connection between the motor and the power system; and generating second warning information in response to a torque change value corresponding to the torque change signal being greater than a second torque change threshold, wherein the second warning information is used to at least indicate triggering the vehicle to perform a parking operation.

[0084] In this embodiment, the abnormal diagnosis and early warning of the disconnectable differential, in addition to monitoring based on response time, special attention is paid to the change in motor torque after the disconnection operation, in order to further ensure the correct execution of the disconnection mechanism and the health status of the differential. This detection method delves into the dynamic response of the electric drive system, adding a new dimension to the differential's fault early warning mechanism and ensuring comprehensive and meticulous safety protection.

[0085] Optionally, when the disconnection operation is triggered, the torque change signal of the motor is simultaneously acquired. This signal reflects the torque change of the motor when it should rapidly drop to zero under the action of the disconnection mechanism. Monitoring the torque change signal is directly related to the efficiency and accuracy of the disconnection mechanism in executing the disconnection command, and is a key indicator for evaluating the quality of the disconnection operation.

[0086] Optionally, a first torque variation threshold is set. This threshold, determined based on historical operating data and experimental testing, is used to define the difference between a normal torque reduction trend and a potential disconnection anomaly. If the motor torque change exceeds this threshold after the disconnection command is issued, it means that the disconnection operation has failed to effectively reduce the motor torque to the expected level, potentially indicating an initial malfunction of the disconnection mechanism.

[0087] Optionally, in response to the motor torque change value exceeding a first torque change threshold The system generates a first warning message, alerting the driver or vehicle maintenance system that disconnecting the power connection between the vehicle's electric motor and powertrain may cause problems, and recommends maintenance and inspection to prevent the fault from worsening and affecting vehicle performance. Generating this first warning message is a crucial step in early fault intervention, helping to take corrective measures before the fault deteriorates.

[0088] Optionally, in addition to the first warning, a more stringent second torque change threshold is also set. This is used to identify serious disconnect mechanism failures that may pose an immediate threat to vehicle safety. If the change in motor torque significantly exceeds the second torque change threshold, it means that the disconnection operation has completely failed, and the motor remains connected to the powertrain, which could lead to loss of vehicle control or serious energy consumption problems.

[0089] Optionally, when the change in motor torque exceeds the second torque change threshold Upon such an incident, the system immediately generates a second warning message, instructing the vehicle to stop immediately and, if necessary, to initiate rescue services to avoid a potentially serious accident. The generation of this second warning message is the system's emergency response to a serious malfunction of the disconnect mechanism, ensuring the safety of the vehicle and its passengers.

[0090] In this step, by monitoring the motor torque change signal and combining it with the first and second torque change thresholds, the effect of the disconnection operation is accurately evaluated, and different levels of early warning information are generated. This ensures that the vehicle can respond in a timely manner when faced with potential failures of the disconnection mechanism, thus guaranteeing the safety and reliability of the vehicle's power system.

[0091] The methods for determining the first baseline response time for a connection operation and the second baseline response time for a disconnection operation will be described below.

[0092] As an optional implementation, the detection method for the vehicle's differential further includes: obtaining the connection durations corresponding to multiple connection operations performed by the disconnection component within a historical time period, thus obtaining multiple connection durations; dividing the multiple connection durations into a first duration, a second duration, and a third duration based on the connection process of the multiple connection operations; performing a weighted average of the first duration, the second duration, and the third duration based on the weight coefficients corresponding to the first duration, the second duration, and the third duration, thus obtaining multiple connection response durations; extracting connection response duration features from the multiple connection response durations, wherein the connection response duration features are used to characterize the stability of the disconnection component when performing connection operations; determining an initial reference connection response duration based on the connection response duration features; determining a first correction coefficient for correcting the initial reference connection response duration based on the vehicle model and the vehicle's environmental information; and correcting the initial reference connection response duration based on the first correction coefficient to obtain a first reference response duration.

[0093] In this embodiment, in the abnormal diagnosis and early warning of the disconnectable differential, in addition to real-time operational response monitoring, an analysis mechanism based on historical operational data is introduced to improve the accuracy and adaptability of monitoring and early warning. This mechanism focuses on analyzing the historical performance of the disconnected component in performing connection operations. By establishing connection response duration characteristics and environmental corrections to the baseline response duration, the robustness and reliability of the diagnostic system are ensured.

[0094] Optionally, the duration records of multiple connection operations performed by the disconnection component within a historical time period are collected to form a series of connection duration data. This data contains the actual operating performance of the disconnection component under different working conditions and serves as the basis for subsequent analysis and feature extraction. Then, based on the process of multiple connection operations, each connection duration data is subdivided into a first duration, a second duration, and a third duration, corresponding to the three key stages of the connection operation: the time from the arrival of the connection command to the start of the drive mechanism's response (…). The time from the start of the drive mechanism's response to the achievement of the first mechanical action ( ), and the time from the first mechanical action to the confirmation of the connection status ( This breakdown helps to more accurately identify the operational efficiency and stability of disconnected components at each stage.

[0095] Optionally, the system assigns weighting coefficients to the first duration, the second duration, and the third duration, respectively. , , These weighting coefficients are optimized based on the mechanical characteristics of the disconnected components and historical data, reflecting the impact of each stage on the overall stability of the connection operation. Using these weighting coefficients, the system performs a weighted average of the three durations to obtain the weighted connection response time for each historical connection operation. Subsequently, by extracting the mode, the most representative connection response time feature can be extracted from this series of weighted connection response times, such as... , , This feature comprehensively reflects the stability indicators when disconnected components perform connection operations, and is key data for building fault early warning benchmarks.

[0096] Optionally, after extracting representative connection response duration features... , , The initial baseline connection response time, i.e., the ideal connection operation response time under conditions without specific environmental influences, can then be calculated using the following formula.

[0097]

[0098] Optionally, considering the impact of vehicle operating environment (e.g., temperature, humidity, altitude) on the performance of disconnect components, after obtaining the initial baseline connection response time, the vehicle model information and the specific conditions of the environment can be further analyzed to determine the first correction coefficient through big data analysis. The correction factor It reflects the adjustment of the baseline response time by environmental factors, which is used to compensate for the response time deviation caused by environmental changes.

[0099] Optionally, after obtaining the first correction coefficient Then, the initial reference connection response time can be calculated using the following formula. Multiply by the first correction factor The revised first baseline response time is more closely aligned with the actual operating environment. .

[0100]

[0101] Optionally, this dynamically adjusted baseline response time more accurately reflects the expected performance of the disconnected component under specific conditions, providing a more precise standard for real-time operation monitoring and fault warning.

[0102] Optionally, by comprehensively analyzing historical connection operation data, refining the duration division, and performing weighted averaging, the system can more accurately identify the stable state of disconnected components, reduce false alarms, and improve the accuracy and reliability of fault warnings. Considering the impact of environmental factors on the performance of disconnected components, the baseline response time is dynamically adjusted through a correction coefficient to ensure that the system maintains high efficiency and high reliability under various operating conditions, avoiding diagnostic errors caused by environmental changes.

[0103] Optionally, through systematic historical data analysis and environmental adaptation correction, a precise connection operation benchmark response time is constructed, providing a solid data foundation and technical support for fault early warning of disconnectable differentials.

[0104] As an optional implementation, the method for detecting the differential in the vehicle further includes: acquiring the disconnection duration corresponding to multiple disconnection operations performed by the disconnection component within a historical time period, thus obtaining multiple disconnection durations; dividing the multiple disconnection durations into a fourth duration, a fifth duration, and a sixth duration based on the disconnection process of the multiple disconnection operations; performing a weighted average of the fourth duration, the fifth duration, and the sixth duration based on the weight coefficients corresponding to the fourth duration, the fifth duration, and the sixth duration, thus obtaining multiple disconnection response durations; extracting disconnection response duration features from the multiple disconnection response durations, wherein the disconnection response duration features are used to characterize the stability of the disconnection component when performing a disconnection operation; determining an initial reference disconnection response duration based on the disconnection response duration features; determining a second correction coefficient to correct the initial reference disconnection response duration based on the vehicle model and the environmental information of the vehicle; and correcting the initial reference disconnection response duration based on the second correction coefficient to obtain a second reference response duration.

[0105] In this embodiment, consistent with the connection operation, for the disconnection operation, the response time characteristics of the disconnection operation can also be extracted based on historical data, and the baseline response time can be corrected based on these characteristics to adapt to the dynamic operating environment of the vehicle and the continuous optimization needs of the model.

[0106] Optionally, the disconnection duration corresponding to multiple disconnection operations performed by the disconnection component within a historical time period can be continuously recorded, forming a database containing multiple disconnection durations. This duration data directly reflects the efficiency and stability of the disconnection operation execution.

[0107] Optionally, for each complete disconnection operation, the duration of three key stages is subdivided: the duration from the arrival of the disconnection command to the change in the drive mechanism current. The fifth time interval from the change in current to the first action of the drive mechanism. And the sixth duration of feedback from the first action to the disconnection confirmation. This division helps to analyze the various stages of the disconnection operation in greater detail.

[0108] Optionally, considering that the impact of different stages on the overall disconnection operation response time may vary, the fourth duration is specified. Fifth duration And the sixth duration Specific weighting coefficients were assigned. , , By using a weighted average, the weighted disconnection response time for each disconnection operation was obtained. This process ensures that the response time characteristics can more comprehensively reflect the actual situation of the disconnection operation.

[0109] Alternatively, the disconnection response duration feature can be extracted from the multiple disconnection response durations obtained by extracting the mode. , , This disconnection response time characteristic can summarize the stability of the disconnection component when it performs a disconnection operation. This characteristic reflects the average response time and its fluctuation trend during the disconnection operation, and is a key basis for subsequently determining the baseline response time.

[0110] Optionally, after extracting representative disconnection response duration features... , , The initial baseline disconnect response time, i.e., the ideal connection operation response time under conditions without specific environmental influences, can then be calculated using the following formula.

[0111]

[0112] Optionally, to enhance the accuracy and adaptability of the early warning system, the specific vehicle model and environmental information during vehicle operation, such as temperature, humidity, and air pressure, are also considered. These factors can all affect the efficiency of the disconnection operation. Based on the aforementioned environmental information and vehicle model data, a second correction coefficient is calculated. This coefficient is used to compensate for the impact of environmental changes on the disconnection response time, ensuring that the response baseline of the early warning system remains accurate and effective under different environmental conditions.

[0113] Optionally, after obtaining the second correction coefficient Then, the initial reference disconnection response time can be multiplied by the second correction factor using the following formula. The revised second baseline response time is more closely aligned with actual operating environments. This revised baseline response time better reflects the normal response time range of the disconnection component under the current environment and vehicle model, improving the accuracy and reliability of fault warnings.

[0114]

[0115] Optionally, by subdividing the duration stages of the disconnection operation and performing a weighted average, the operating status of the disconnected component can be monitored more accurately, providing more detailed data support for fault early warning. Introducing a second correction coefficient can automatically adjust the baseline of the response time to adapt to different environmental conditions, avoiding false alarms or missed alarms caused by environmental changes and enhancing the generalization ability of the early warning model.

[0116] The technical solutions of the embodiments of this application will be illustrated below with reference to preferred embodiments.

[0117] Figure 2 This is a schematic diagram of a vehicle differential detection system according to an embodiment of this application, as shown below. Figure 2 As shown, the vehicle's differential detection system 200 includes: a data acquisition and preprocessing module 201, a feature processing and trend judgment module 202, and a cloud-based linkage diagnostic module 203. Through these three modules, intelligent diagnosis of the entire process from data acquisition and processing to anomaly warning is realized.

[0118] The data acquisition and preprocessing module 201 is the cornerstone of the vehicle's differential detection system. It employs a synchronous acquisition architecture to ensure the efficiency and accuracy of real-time signal collection and transmission from multiple vehicle subsystems. This module is responsible for collecting the operating status signals of the disconnect mechanism and real-time driving data from the electric drive assembly, providing raw data for subsequent fault diagnosis and trend analysis.

[0119] Optionally, the data acquisition and preprocessing module 201 establishes a timestamp system to assign precise time labels to all acquired signals and data. This operation ensures that even in a high-speed vehicle, the temporal relationship of each signal or data point can be accurately captured, providing a time reference for precise analysis of the disconnection mechanism's operating status and fault location. The acquired signals include, but are not limited to: control command signals, drive current signals, position sensor signals, and on / off status signals. The real-time acquisition and synchronous packaging of these signals, sent to the cloud, constitute a crucial data source for comprehensive monitoring of the disconnection mechanism's status, laying a solid foundation for subsequent feature extraction and trend analysis.

[0120] Optionally, the data acquisition and preprocessing module 201 acquires the vehicle's motor signals in real time through the rotary transformer built into the electric drive assembly, including: speed command signal, torque command signal, actual speed signal, actual torque signal, motor operating status signal, etc., and packages the data to send to the cloud for further comprehensive judgment and analysis of the motor torque change trend after the differential is disconnected.

[0121] Understandably, the efficient operation of the data acquisition and preprocessing module not only ensures the real-time performance and accuracy of signal acquisition, but also provides comprehensive data support for the health status monitoring and fault warning of the disconnect differential through intelligent analysis in the cloud. It is a key link in the information chain of the entire early warning system and plays a vital role in improving the safety and reliability of the four-wheel drive electric vehicle power system.

[0122] The fault feature processing and trend judgment module 202, as the front-end perception layer of the system, uses the response time feature model and the mechanical connection abnormal feature model to realize multi-dimensional real-time monitoring of the operating status of the disconnection mechanism.

[0123] The response time characteristic model is a core component of the disconnectable differential anomaly diagnosis and early warning system. Through precise decomposition of the differential engagement and disengagement processes, a characteristic analysis mechanism based on response time has been established. This model not only focuses on the completion time of the operation but also delves into each key stage, thereby enabling a more comprehensive assessment of the performance status and health level of the disconnecting mechanism.

[0124] Optionally, the process of connecting and disconnecting the differential can be broken down into three stages. By monitoring the response time of each stage, the system can capture minute changes during the execution of the disconnection mechanism. Figure 3 This is a schematic diagram of a differential engagement response process according to an embodiment of this application. Figure 4 This is a schematic diagram of a differential disconnection response process according to an embodiment of this application.

[0125] Optionally, the connection process can be divided into the following three stages: When the connection command arrives on the CAN bus, the coil current of the drive mechanism begins to increase, starting to overcome the spring force; The current in the drive mechanism's coil begins to increase, starting to overcome the spring force—this is the first action of the drive mechanism. : First action of the drive mechanism - on / off signal feedback connection.

[0126] Optionally, the disconnection process can be divided into the following three stages: When the disconnect command reaches the CAN bus, the coil current of the drive mechanism drops to zero. The drive mechanism's coil current reaches zero—this is when the drive mechanism operates for the first time. The drive mechanism operates for the first time – the on / off signal feedback is disconnected.

[0127] Optionally, to quantify the duration characteristics of the above six stages, a weighted average method was adopted, using the optimal weighting coefficients obtained from bench tests. to Then, the response time characteristics of the binding and disconnection processes are calculated using the following two formulas, respectively. and This weighted method takes into account the relative importance of each stage in the overall operation, ensuring that the calculation of characteristic durations reflects the actual operational efficiency and stability.

[0128]

[0129]

[0130] Optionally, the initial 50 disconnection and reconnection processes of the vehicle can be used as a learning phase. Dispersion analysis is performed on its three response duration features. To resist extreme value interference, the mode is extracted as the response duration feature, combined with the phase response duration features. , , Disconnection phase response time characteristics , , The initial datum is then determined using the following formula, where, Used to characterize the initial reference of the bonding state Used to characterize the initial baseline of the disconnected state.

[0131]

[0132]

[0133] Alternatively, in the operation of a disconnectable differential, abnormal mechanical connection is one of the main reasons why the disconnecting mechanism cannot function properly. This abnormality usually manifests as broken teeth in the jaw clutch or disengagement of the drive mechanism's pawls, causing partial or complete power transmission to actually occur even when the disconnecting mechanism has theoretically disconnected the power connection. This state not only affects the vehicle's power performance but also increases energy consumption, posing a threat to the operational safety of the electric drive system and even the entire vehicle.

[0134] Optionally, to effectively identify this type of fault, a mechanical connection anomaly characteristic model was designed, the core of which lies in monitoring the torque change of the motor after the differential is disengaged. First, after the differential disengagement operation is completed, the disengagement mechanism will send a position signal to confirm that it is in the disengaged state. This signal is the initial basis for the system to determine whether the disengagement operation was successfully executed. Then, the vehicle motor is controlled to reduce its speed to zero according to a preset program. This operation is a key step in testing whether the disengagement mechanism has truly disconnected the power connection. By simulating a state without power input, the actual working state of the disengagement mechanism can be effectively verified. From the moment the motor speed drops to zero, the change in motor torque is continuously monitored. This process can directly reflect the effect of the disconnection mechanism in disconnecting the power connection, and helps to identify whether there is an abnormal mechanical connection between the dental disc and the drive mechanism.

[0135] Optionally, the system sets a first-level limit for torque variation fluctuation based on bench test data. When the monitored motor torque change If the fluctuation exceeds this limit, and the number of consecutive exceedances reaches or exceeds three times, a Level 1 alarm will be triggered. The Level 1 alarm is designed to alert the driver and maintenance personnel to potential early minor faults in the disconnect mechanism, allowing for timely maintenance and inspection to prevent further deterioration of the fault.

[0136] Optionally, for more severe mechanical connection anomalies, the system sets a higher secondary limit. Once the torque change is detected... Fluctuations exceeding this more stringent limit The system will immediately trigger a Level 2 alarm, instructing the vehicle to stop safely immediately and initiating emergency rescue procedures. A Level 2 alarm addresses emergencies that could cause serious damage to the electric drive system or immediately threaten vehicle safety, ensuring the fastest possible response to avoid potential dangers and losses.

[0137] Understandably, by monitoring changes in motor torque in real time, the mechanical connection anomaly feature model can capture early signs of mechanical failure in the disconnection mechanism, enabling early warning and avoiding subsequent losses and safety risks caused by undetected faults. A tiered alarm strategy is introduced, triggering different levels of warnings based on the severity of the fault. This ensures rapid response to emergencies while avoiding overreaction to minor faults, thus improving the practicality and intelligence of the early warning system.

[0138] The cloud-based collaborative diagnostic module 203 includes a data transmission strategy and a cloud-based collaborative optimization strategy for diagnostic benchmarks. The data transmission strategy uploads data to the cloud, reducing terminal computation and saving terminal costs. Through targeted caching, the system collects complete disconnection or reconnection operation data at the terminal, as well as monitoring data of motor torque after disconnection, and then encapsulates this data into a data packet. The generation and caching of the data packet ensures data integrity and accuracy while reducing the burden of real-time terminal computation and optimizing network resource utilization. The data packet is uploaded to the cloud at a fixed low-frequency period. This strategy balances the real-time nature of data transmission with network load, avoiding network congestion caused by frequent data transmission, and ensuring that the cloud can continuously receive and update vehicle operating status data, providing a stable data source for subsequent intelligent diagnostics.

[0139] Regarding the cloud-based collaborative optimization strategy for diagnostic benchmarks, since the cloud aggregates a large amount of operational data from the same vehicle model, comparative analysis can identify the changing trends in the response time of the disconnection mechanism under different environmental conditions. This analysis, based on environmental parameters such as temperature and air pressure, helps to build more accurate diagnostic benchmarks, making the warning system more adaptable to actual operating environments.

[0140] Optionally, to reduce the impact of environmental factors on the response time of the disconnection mechanism, the uniform variation trend of the response time of the disconnection mechanism of the same vehicle model under different environmental conditions such as temperature and air pressure was analyzed, and the compensation coefficient of external environmental factors during the engagement stage was calculated. Environmental factor compensation coefficient during the disconnection phase These coefficients reflect the degree to which environmental changes affect operational response time. By adjusting them, the diagnostic benchmark can be made closer to the normal response time of the vehicle under current conditions, thereby improving the accuracy of fault detection.

[0141] Optionally, the compensation coefficient for external environmental factors at the integration stage is obtained. Compensation coefficient for boundary environmental factors during the disconnection phase The following formula can be used, based on the environmental compensation coefficient. and Initial reference for the original disconnected and joined states and After making corrections and generating compensation for the impact of external environmental factors, the diagnostic criteria for each stage are combined. And the diagnostic criteria for the disconnection phase after compensating for the influence of external environmental factors. This process ensures that diagnostic benchmarks remain consistent under different environmental conditions, avoiding false alarms or missed alarms caused by environmental changes.

[0142]

[0143]

[0144] Optionally, upon obtaining and Then, the offset of the response duration feature relative to the diagnostic baseline can be calculated. For example, this can be combined with the stage offset. Offset during disconnection phase ,in, Used to indicate the offset limit during the bonding phase. This is used to indicate the offset limit during the disconnection phase. If the offset exceeds the offset limit and the number of times the limit is exceeded exceeds 3, a Level 1 alarm is triggered. The Level 1 alarm may include: auxiliary drive disconnection + maintenance reminder.

[0145] Figure 5 This is a flowchart of an online early warning method based on response time characteristics according to an embodiment of this application, such as... Figure 5 As shown, the method includes the following steps:

[0146] Step S501: Real-time synchronous acquisition of differential disengagement and engagement process data and electric drive assembly resolver signal.

[0147] In this embodiment, key signal data during vehicle operation is collected in real time and synchronously via the differential controller and the rotary transformer built into the electric drive assembly. This includes, but is not limited to, the issuance of disconnect commands, the response of the drive mechanism, the execution of actual mechanical actions, and changes in motor torque. Real-time and synchronous data acquisition is fundamental to ensuring the accuracy of subsequent analysis.

[0148] In step S502, a targeted caching-transmission strategy is adopted to transmit the disconnection and reconnection process data to the cloud.

[0149] In this embodiment, the collected signal data is integrated into data packets using a targeted buffer-transmission strategy. This means that the data packets are temporarily stored on the terminal side until preset upload conditions are met (e.g., a fixed low-frequency period) before being uploaded to the cloud. This strategy not only optimizes data transmission efficiency but also reduces the computational burden on the terminal, improving the overall system performance.

[0150] Step S503: The cloud performs discretization analysis on the data during the learning phase, extracts feature variables, and establishes an initial baseline.

[0151] In this embodiment, the data packets uploaded to the cloud undergo discretization analysis. By analyzing the data from the vehicle's initial 50 disconnection and reconnection processes, the system can distinguish and extract representative characteristic variables. These variables reflect the response characteristics of the disconnection mechanism at different operational stages.

[0152] Optionally, based on the mode characteristic variable obtained from discretization analysis, initial benchmarks for the combined and disconnected states are constructed in the cloud. These benchmarks provide a reference standard for subsequent monitoring of response duration characteristics, helping to ensure the accuracy and reliability of the early warning system.

[0153] In step S504, the cloud performs a horizontal comparison of the initial benchmark of the same vehicle model, compensates for the influence of external factors such as ambient temperature and air pressure, and makes a comprehensive judgment to obtain the diagnostic coefficient and determine the final diagnostic benchmark.

[0154] In this embodiment, the cloud platform performs a horizontal comparison of initial benchmarks for different vehicles of the same model, analyzing the changing trends in the response time of the disconnection mechanism under different environmental conditions (e.g., temperature, air pressure). Through comparative analysis, the system can identify the impact of environmental factors on response time, thereby determining the environmental compensation coefficient. and .

[0155] Optionally, the cloud-based system uses an environmental compensation coefficient to correct the initial baseline, generating the final diagnostic baseline. and This update process takes into account the impact of the external environment on the differential operating time, ensuring the consistency and accuracy of the diagnostic benchmark under various environmental conditions and avoiding false alarms caused by environmental changes.

[0156] Step S505: Continuously monitor the operating status of the disconnection mechanism, calculate the offset of the response time characteristic relative to the diagnostic benchmark, evaluate the torque fluctuation level based on the limit value, and determine whether an alarm is triggered.

[0157] In this embodiment, the system continuously monitors the operating status of the disconnecting mechanism and calculates in real time the offset between the extreme response time characteristics and the environmentally corrected diagnostic benchmark. This continuous monitoring process is crucial for identifying potential faults in the disconnecting mechanism. Based on the comparison between the offset and preset alarm limits, the system evaluates the level of torque fluctuation. If the offset exceeds the limit, and the number of consecutive exceedances reaches or exceeds three times, an alarm of the corresponding level is triggered. A level one alarm indicates that the auxiliary drive should be disconnected and maintenance should be requested; a level two alarm commands immediate safe shutdown and initiation of rescue operations, ensuring timely response and handling of abnormalities in the disconnecting mechanism.

[0158] In steps S501 to S505 above, a complete and efficient technical process is formed, from real-time signal acquisition to cloud-based data analysis and benchmark construction, and finally to continuous monitoring and alarm triggering. This process can not only monitor the response time changes of the disconnection mechanism in real time, but also dynamically optimize the early warning benchmark through intelligent analysis in the cloud, significantly improving the environmental adaptability and accuracy of the early warning system.

[0159] Figure 6 This is a flowchart of an online early warning method for abnormal mechanical connection features according to an embodiment of this application, such as... Figure 6 As shown, the method includes the following steps:

[0160] Step S601: Real-time synchronous acquisition of differential controller and electric drive assembly resolver signals during the deceleration phase after the differential is disconnected.

[0161] In this embodiment, key signals are acquired in real-time as the vehicle enters the deceleration phase after the differential is disengaged. This involves real-time data acquisition from the differential controller and the rotary transformer within the electric drive assembly, including but not limited to the position signal of the disengagement mechanism, control commands, current changes in the drive mechanism, and torque changes of the motor during the deceleration phase. Real-time acquisition ensures that the system can promptly monitor the operating status of the disengagement mechanism and its impact on the motor torque.

[0162] In step S602, a directional buffer-transmission strategy is adopted to transmit the differential controller signal and the electric drive assembly signal to the cloud.

[0163] In this embodiment, a targeted caching-transmission strategy is employed to integrate the differential controller signal and electric drive assembly signal data collected in step S601, forming a data packet which is then cached at the terminal. This strategy aims to optimize the data transmission process, reduce network bandwidth consumption, and ensure data integrity and accuracy. The data packet is automatically uploaded to the cloud within a preset low-frequency period for further analysis.

[0164] Step S603: Analyze and process the differential controller signal and assembly signal.

[0165] In this embodiment, after receiving the data packet, the cloud performs in-depth analysis, focusing on monitoring the change in motor torque after the differential is disengaged. The system utilizes previously defined primary limits. and secondary limits This is used to evaluate the level of torque fluctuation. At the same time, by comparing multiple datasets of the same vehicle model, the influence of external factors such as ambient temperature and air pressure on torque fluctuation is analyzed, thereby determining a more accurate diagnostic coefficient and optimizing the accuracy of the early warning model.

[0166] Step S604: Evaluate the torque fluctuation level based on the limit value and determine whether to trigger an alarm.

[0167] In this embodiment, after completing data analysis, the system determines whether to trigger an alarm based on the level of torque fluctuation. If the motor torque fluctuation exceeds the set first-level limit... If the number of consecutive over-limit occurrences reaches or exceeds three times, a Level 1 alarm will be triggered, reminding the driver to disconnect the auxiliary drive motor and prompting for maintenance and inspection. If the torque fluctuations are more severe and exceed the more stringent safety limits, a Level 1 alarm will be triggered. If the system fails, it will immediately trigger a level two alarm, force the vehicle into a safe parking mode, and initiate an emergency rescue process to deal with possible serious mechanical failures.

[0168] In steps S601 to S604 above, by integrating real-time signal acquisition, directional buffer transmission, cloud-based intelligent analysis, and hierarchical alarm mechanisms, effective monitoring of the mechanical connection status under abnormal conditions of the disconnect differential is achieved, providing strong technical support for ensuring the stable operation and driving safety of the four-wheel drive electric vehicle power system.

[0169] According to an embodiment of this application, a detection device for a vehicle center differential is also provided. It should be noted that this detection device for a vehicle center differential can be used to perform the detection method for the vehicle center differential described in the embodiments.

[0170] Figure 7 This is a schematic diagram of a vehicle differential detection device according to an embodiment of this application. Figure 7 As shown, the vehicle differential detection device 700 may include: an acquisition unit 701, a first determination unit 702, a second determination unit 703, and a generation unit 704.

[0171] The acquisition unit 701 is used to acquire the operation status signal of the disconnected component, wherein the operation status signal is used to characterize the power connection status between the vehicle's motor and the vehicle's power system.

[0172] The first determining unit 702 is used to determine the target response time of the disconnection component performing the target type operation based on the operation status signal. The target type operation is either a connection operation or a disconnection operation. The connection operation is used to control the motor to establish a power connection with the power system, and the disconnection operation is used to control the motor to disconnect the power connection with the power system.

[0173] The second determining unit 703 is used to determine the operating state of the differential based on the target response time and the reference response time corresponding to the target type operation, wherein the operating state is used to indicate whether there is a fault in the differential.

[0174] The generation unit 704 is used to generate a warning message in response to a working status indication that the differential is faulty, wherein the warning message is used to at least indicate that the differential needs to be repaired.

[0175] Optionally, the first determining unit 702 is further configured to: determine a first target response duration for the disconnecting component to perform a connection operation based on the operation status signal, wherein the first target response duration is used to characterize the time from when the disconnecting component receives the connection command to when the motor and the power system establish a connection; or, determine a second target response duration for the disconnecting component to perform a disconnect operation based on the operation status signal, wherein the second target response duration is used to characterize the time from when the disconnecting component receives the disconnect command to when the motor and the power system disconnect.

[0176] Optionally, the second determining unit 703 is further configured to: determine the operating state of the differential based on the first target response duration and the first reference response duration corresponding to the connection operation in response to the target type operation being a connection operation; or, determine the operating state of the differential based on the second target response duration and the second reference response duration corresponding to the disconnection operation in response to the target type operation being a disconnection operation.

[0177] Optionally, the second determining unit 703 is further configured to: in response to the difference between the first target response duration and the first reference response duration being greater than the first difference threshold, determine the first number of times the difference between the first target response duration and the first reference response duration is greater than the first difference threshold based on the operation status signal of the disconnection component within a preset time period; and in response to the first number being greater than a preset value, determine that the differential's operating status indicates a fault in the differential.

[0178] Optionally, the second determining unit 703 is further configured to: in response to the difference between the second target response duration and the second reference response duration being greater than the second difference threshold, determine a second number of times the difference between the second target response duration and the second reference response duration is greater than the second difference threshold based on the operation status signal of the disconnect component within a preset time period; and in response to the second number being greater than a preset value, determine that the differential's operating status indicates a differential malfunction.

[0179] Optionally, the device 700 is further configured to: acquire a torque change signal of the motor in response to a target type operation being a disconnection operation, wherein the torque change signal is used to characterize the torque change of the motor after receiving the disconnection command; generate a first warning message in response to a torque change value corresponding to the torque change signal being greater than a first torque change threshold, wherein the first warning message is used to at least indicate the disconnection of the power connection between the motor and the power system; and generate a second warning message in response to a torque change value corresponding to the torque change signal being greater than a second torque change threshold, wherein the second warning message is used to at least indicate the triggering of a vehicle to perform a parking operation.

[0180] Optionally, the device 700 is further configured to: obtain the connection durations corresponding to multiple connection operations performed by the disconnection component within a historical time period, thereby obtaining multiple connection durations; based on the connection process of the multiple connection operations, divide the multiple connection durations into a first duration, a second duration, and a third duration; based on the weight coefficients corresponding to the first duration, the second duration, and the third duration, respectively, perform a weighted average of the first duration, the second duration, and the third duration to obtain multiple connection response durations; extract connection response duration features from the multiple connection response durations, wherein the connection response duration features are used to characterize the stability of the disconnection component when performing connection operations; determine an initial baseline connection response duration based on the connection response duration features; determine a first correction coefficient for correcting the initial baseline connection response duration based on the vehicle model and the environmental information of the vehicle; and correct the initial baseline connection response duration based on the first correction coefficient to obtain a first baseline response duration.

[0181] Optionally, the device 700 is further configured to: obtain the disconnection duration corresponding to multiple disconnection operations performed by the disconnection component within a historical time period, thereby obtaining multiple disconnection durations; based on the disconnection process of the multiple disconnection operations, divide the multiple disconnection durations into a fourth duration, a fifth duration, and a sixth duration; based on the weighting coefficients corresponding to the fourth duration, the fifth duration, and the sixth duration, respectively, perform a weighted average of the fourth duration, the fifth duration, and the sixth duration to obtain multiple disconnection response durations; extract disconnection response duration features from the multiple disconnection response durations, wherein the disconnection response duration features are used to characterize the stability of the disconnection component when performing disconnection operations; determine an initial baseline disconnection response duration based on the disconnection response duration features; determine a second correction coefficient for correcting the initial baseline disconnection response duration based on the vehicle model and the environmental information of the vehicle; and correct the initial baseline disconnection response duration based on the second correction coefficient to obtain a second baseline response duration.

[0182] In the vehicle differential detection device described in this application, by real-time detection of the operation status signal of the disconnection component in the differential, it is possible to quickly identify whether the response time of the disconnection component performing connection or disconnection operations meets the normal response benchmark. Once it is detected that the response time of the disconnection component deviates from the preset requirements, an early warning message is immediately generated to remind the vehicle manager or user to repair the differential in a timely manner. This effectively prevents the occurrence of serious faults, improves the safety and operating efficiency of the vehicle, and enables early warning to be issued in the early stage of the fault. This avoids the situation in traditional methods where the fault is only detected when it has deteriorated to an obvious stage, thereby solving the technical problem of not being able to detect vehicle differential faults in a timely manner in related technologies.

[0183] Embodiments of this application also provide an electronic device, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the vehicle differential detection method in various embodiments of this application when it runs.

[0184] Embodiments of this application also provide a computer-readable storage medium, which includes a stored executable program, wherein, when the executable program is executed, it controls the device where the computer-readable storage medium is located to perform the vehicle differential detection method of various embodiments of this application.

[0185] Embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the vehicle differential detection method in various embodiments of this application.

[0186] Embodiments of this application also provide a computer program product, including a non-volatile computer-readable storage medium for storing a computer program, which, when executed by a processor, implements the vehicle differential detection method in various embodiments of this application.

[0187] The embodiments of this application also provide a computer program that, when executed by a processor, implements the vehicle differential detection method described in the various embodiments of this application.

[0188] Embodiments of this application also provide a vehicle for performing the vehicle differential detection method in various embodiments of this application.

[0189] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0190] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0191] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0192] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0193] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0194] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0195] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for detecting a vehicle's differential, characterized in that, The vehicle center differential includes a disconnect component, and the method includes: Obtain the operation status signal of the disconnection component, wherein the operation status signal is used to characterize the power connection status between the vehicle's motor and the vehicle's power system; Based on the operation status signal, the target response time for the disconnection component to perform the target type operation is determined, wherein the target type operation is at least one of a connection operation and a disconnection operation, the connection operation is used to control the motor to establish a power connection with the power system, and the disconnection operation is used to control the motor to disconnect the power connection from the power system; The operating state of the differential is determined based on the target response time and the baseline response time corresponding to the target type operation, wherein the operating state is used to indicate whether the differential is faulty. In response to the operating status indicating a fault in the differential, a warning message is generated, wherein the warning message is used to at least indicate that the differential needs to be repaired; Based on the operation status signal, the target response time for the disconnection component to perform the target type operation is determined, including: Based on the operation status signal, a first target response duration is determined for the disconnection component to perform the connection operation, wherein the first target response duration characterizes the time from when the disconnection component receives the connection command to when the motor establishes a connection with the power system; or... Based on the operation status signal, a second target response duration is determined for the disconnection component to perform the disconnection operation, wherein the second target response duration is used to characterize the time from when the disconnection component receives the disconnection command to when the motor disconnects from the power system.

2. The method according to claim 1, characterized in that, Based on the target response time and the baseline response time corresponding to the target type of operation, the operating state of the differential is determined, including: In response to the target type operation being the connection operation, the operating state of the differential is determined based on the first target response duration and the first reference response duration corresponding to the connection operation; or... In response to the target type operation being the disconnect operation, the operating state of the differential is determined based on the second target response duration and the second reference response duration corresponding to the disconnect operation.

3. The method according to claim 2, characterized in that, Based on the first target response time and the first reference response time corresponding to the connection operation, the operating state of the differential is determined, including: In response to the difference between the first target response duration and the first reference response duration being greater than a first difference threshold, based on the operation status signal of the disconnection component within a preset time period, a first number of times the difference between the first target response duration and the first reference response duration is greater than the first difference threshold is determined; In response to the first count being greater than a preset value, the operating state of the differential is determined to indicate that the differential is faulty.

4. The method according to claim 2, characterized in that, The operating state of the differential is determined based on the second target response time and the second reference response time corresponding to the disconnection operation, including: In response to the difference between the second target response duration and the second reference response duration being greater than a second difference threshold, based on the operation status signal of the disconnection component within a preset time period, a second number of times the difference between the second target response duration and the second reference response duration is greater than the second difference threshold is determined; In response to the second count being greater than a preset value, the operating state of the differential is determined to indicate that the differential is faulty.

5. The method according to claim 4, characterized in that, The method further includes: In response to the target type operation being the disconnect operation, a torque change signal of the motor is acquired, wherein the torque change signal is used to characterize the torque change of the motor after receiving the disconnect command; In response to the torque change value corresponding to the torque change signal being greater than a first torque change threshold, a first warning message is generated, wherein the first warning message is used to at least indicate the disconnection of the power connection between the motor and the power system; In response to the torque change value corresponding to the torque change signal being greater than a second torque change threshold, a second warning message is generated, wherein the second warning message is used to at least indicate that the vehicle should be triggered to perform a parking operation.

6. The method according to claim 1, characterized in that, The method further includes: The connection durations corresponding to the multiple connection operations performed by the disconnection component within a historical time period are obtained, resulting in multiple connection durations. Based on the connection process of the multiple connection operations, the duration of the multiple connections is divided into a first duration, a second duration, and a third duration. Based on the weight coefficients corresponding to the first duration, the second duration, and the third duration, a weighted average is performed on the first duration, the second duration, and the third duration to obtain multiple connection response durations; The connection response duration features are extracted from the plurality of connection response durations, wherein the connection response duration features are used to characterize the stability of the disconnection component when performing the connection operation; Based on the connection response duration characteristics, an initial baseline connection response duration is determined; Based on the vehicle model and the environment in which the vehicle is located, a first correction coefficient is determined to correct the initial reference connection response time. Based on the first correction coefficient, the initial reference connection response duration is corrected to obtain the first reference response duration.

7. The method according to claim 1, characterized in that, The method further includes: The disconnection durations corresponding to the multiple disconnection operations performed by the disconnection component within a historical time period are obtained, resulting in multiple disconnection durations. Based on the disconnection process of the multiple disconnection operations, the multiple disconnection durations are respectively divided into a fourth duration, a fifth duration, and a sixth duration; Based on the weighting coefficients corresponding to the fourth, fifth, and sixth durations, a weighted average is performed on the fourth, fifth, and sixth durations to obtain multiple disconnection response durations; Disconnection response duration features are extracted from the plurality of disconnection response durations, wherein the disconnection response duration features are used to characterize the stability of the disconnection component when performing the disconnection operation; Based on the disconnection response duration characteristics, an initial baseline disconnection response duration is determined; Based on the vehicle model and the environmental information of the vehicle, a second correction coefficient is determined to correct the initial reference disconnection response time; Based on the second correction coefficient, the initial reference disconnection response duration is corrected to obtain the second reference response duration.

8. A detection device for a vehicle differential, characterized in that, The vehicle center differential includes a disconnect component, and the device includes: An acquisition unit is used to acquire the operation status signal of the disconnection component, wherein the operation status signal is used to characterize the power connection status between the vehicle's motor and the vehicle's power system. The first determining unit is configured to determine, based on the operation status signal, the target response time for the disconnection component to perform a target type operation, wherein the target type operation is at least one of a connection operation and a disconnection operation, the connection operation is configured to control the motor to establish a power connection with the power system, and the disconnection operation is configured to control the motor to disconnect the power connection from the power system; The second determining unit is used to determine the operating state of the differential based on the target response time and the reference response time corresponding to the target type operation, wherein the operating state is used to indicate whether the differential has a fault. A generation unit is configured to generate warning information in response to the operating state indicating a fault in the differential, wherein the warning information is used to at least indicate that the differential needs to be repaired; Based on the operation status signal, the target response time for the disconnection component to perform the target type operation is determined, including: Based on the operation status signal, a first target response duration is determined for the disconnection component to perform the connection operation, wherein the first target response duration characterizes the time from when the disconnection component receives the connection command to when the motor establishes a connection with the power system; or... Based on the operation status signal, a second target response duration is determined for the disconnection component to perform the disconnection operation, wherein the second target response duration is used to characterize the time from when the disconnection component receives the disconnection command to when the motor disconnects from the power system.

9. An electronic device, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device on which the storage medium is located to perform the method according to any one of claims 1 to 7.

11. A computer program product, characterized in that, Includes a computer program that, when executed by a processor, implements the method according to any one of claims 1 to 7.

12. A vehicle, characterized in that, The vehicle is used to perform the method according to any one of claims 1 to 7.

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