Vehicle transmission system monitoring methods, devices, storage media, and vehicles

Abstract

This disclosure relates to a method, apparatus, storage medium, and vehicle for monitoring a vehicle's transmission system, wherein the transmission system includes a driveshaft. The method includes: acquiring rotational speed data of the driveshaft within a preset time period, and acquiring rotational angle data of the driveshaft based on the rotational speed data; updating a fault count value if the rotational angle data meets a preset condition; and reducing the vehicle's driving torque if the updated fault count value exceeds an abnormal threshold. This disclosure effectively prevents driveshaft breakage by monitoring the rotational angle data of the driveshaft.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle monitoring technology, specifically to a method, device, storage medium, and vehicle for monitoring the transmission system of a vehicle. Background Technology

[0002] The transmission system is a crucial component of a vehicle, primarily responsible for transmitting the power and torque generated by the engine to the wheels to propel the vehicle. Besides the gearbox, universal joints, drive shafts, and drive axles, the transmission system can also include the rear axle final reduction gear, differential, and half-shafts. During vehicle operation, the electric motor generates high torque drive and feedback, which causes wear on the transmission system. When the wear reaches a certain level, fracture failure may occur. Therefore, how to better monitor the transmission system is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] The purpose of this disclosure is to provide a method, apparatus, storage medium, and vehicle for monitoring the transmission system of a vehicle, in order to solve the aforementioned technical problems.

[0004] To achieve the above objectives, a first aspect of this disclosure provides a method for monitoring a vehicle's transmission system, the transmission system including a drive shaft, the method comprising:

[0005] Obtain the rotational speed data of the drive shaft within a preset time period, and obtain the rotational angle data of the drive shaft based on the rotational speed data;

[0006] If the corner data is determined to meet the preset conditions, the fault count value is updated;

[0007] If the updated fault count value exceeds the abnormal threshold, reduce the vehicle's driving torque.

[0008] Optionally, the method includes:

[0009] The torque zero-crossing window of the vehicle is obtained. The torque zero-crossing window corresponds to a first driveshaft speed and a second driveshaft speed. The first driveshaft speed is greater than the second driveshaft speed. The time point corresponding to the first driveshaft speed is the start time of the preset time period, and the time point corresponding to the second driveshaft speed is the end time of the preset time period.

[0010] Optionally, obtaining the rotational speed data of the drive shaft within a preset time period includes:

[0011] The average speed fluctuation is determined based on the first drive shaft speed and the second drive shaft speed corresponding to the torque zero-crossing window, and the average speed fluctuation is used as the speed data.

[0012] Optionally, obtaining the rotational speed data of the drive shaft within a preset time period further includes:

[0013] It is determined that the drive shaft has a reverse torque, and the rotational speed data of the drive shaft within a preset time period is obtained.

[0014] Optionally, determining that the drive shaft has a reverse torque and obtaining the rotational speed data of the drive shaft within a preset time period includes:

[0015] When it is determined that the drive shaft has the reverse torque and the vehicle malfunctions, the fault level of the vehicle is obtained;

[0016] If the fault level is determined to be less than a preset level, the rotational speed data of the drive shaft within a preset time period is obtained.

[0017] Optionally, determining that the drive shaft has a reverse torque and obtaining the rotational speed data of the drive shaft within a preset time period further includes:

[0018] When the vehicle is in motion, obtain the vehicle's speed;

[0019] When it is determined that the driving speed exceeds the preset speed and the drive shaft has the reverse torque, the rotational speed data of the drive shaft within a preset time period is obtained.

[0020] Secondly, this disclosure provides a vehicle transmission system monitoring device, the transmission system including a drive shaft, the device comprising:

[0021] The acquisition module is configured to acquire the rotational speed data of the drive shaft within a preset time period, and acquire the rotational angle data of the drive shaft based on the rotational speed data;

[0022] The update module is configured to update the fault count value if it is determined that the corner data meets the preset conditions.

[0023] The processing module is configured to determine if the updated fault count value exceeds an abnormal threshold and reduce the vehicle's driving torque.

[0024] Thirdly, this disclosure provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the method described in the first aspect.

[0025] Fourthly, this disclosure provides a vehicle, the vehicle comprising:

[0026] A memory on which computer programs are stored;

[0027] A processor for executing the computer program in the memory to implement the steps of the method described in the first aspect.

[0028] Fifthly, this disclosure provides a computer program product, including a computer program that, when executed by a processor, implements the method described in the first aspect.

[0029] This disclosure enables accurate and effective monitoring of transmission system faults based on angle data. Specifically, it acquires the rotational speed data of the drive shaft within a preset time period and obtains the rotational angle data of the drive shaft based on the rotational speed data. If it is determined that the rotational angle data meets preset conditions, the fault count value is updated. Finally, if it is determined that the updated fault count value exceeds the abnormal threshold, the vehicle's driving torque is reduced, thus ensuring vehicle safety to a certain extent.

[0030] Other features and advantages of this disclosure will be described in detail in the following detailed description section. Attached Figure Description

[0031] The accompanying drawings are provided to further illustrate the present disclosure and form part of the specification. They are used together with the following detailed description to explain the present disclosure, but do not constitute a limitation thereof. In the drawings:

[0032] Figure 1 This is a structural example diagram of the transmission system in a vehicle.

[0033] Figure 2 This is a flowchart illustrating a method for monitoring the transmission system of a vehicle according to an exemplary embodiment.

[0034] Figure 3 This is a flowchart illustrating another method for monitoring the transmission system of a vehicle according to an exemplary embodiment.

[0035] Figure 4 This is a flowchart illustrating another method for monitoring the transmission system of a vehicle, according to an exemplary embodiment.

[0036] Figure 5 This is a block diagram illustrating a vehicle transmission system monitoring device according to an exemplary embodiment.

[0037] Figure 6 This is a block diagram illustrating a vehicle according to exemplary embodiments of the present disclosure. Detailed Implementation

[0038] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0039] Embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings. While some embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this disclosure. It should be understood that the accompanying drawings and embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of protection of this disclosure.

[0040] It should be understood that the steps described in the method embodiments of this disclosure may be performed in different orders and / or in parallel. Furthermore, the method embodiments may include additional steps and / or omit the steps shown. The scope of this disclosure is not limited in this respect.

[0041] The term "comprising" and its variations as used herein are open-ended inclusions, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the description below.

[0042] It should be noted that the concepts of "first" and "second" mentioned in this disclosure are used only to distinguish different devices, modules or units, and are not used to limit the order of functions performed by these devices, modules or units or their interdependencies.

[0043] In related technologies, transmission systems may include, in addition to, Figure 1 In addition to the transmission, universal joint, drive shaft and drive axle shown, it may also include the rear axle main reduction gear, differential and half shaft, etc.

[0044] During heavy-load driving, the motor experiences high torque drive and feedback, which accelerates wear on the transmission system. Prolonged wear can cause the driveshaft's free rotation angle to exceed normal limits, leading to rear axle knocking. Furthermore, when wear exceeds a certain level, the vehicle's transmission system may break, jeopardizing vehicle safety.

[0045] In related technologies, vehicle motors can drive the vehicle and also recover kinetic energy through braking with negative torque. However, the dual loads (positive and negative) place high demands on the rear axle strength. Because the gears have low reverse strength, they are unable to withstand torque and impact, making them prone to deformation and breakage. Furthermore, during heavy-load braking, the rear axle gear cross shaft is highly susceptible to breakage, posing a serious safety hazard. Currently, fault detection primarily focuses on the motor, battery, and electronic control system, but there is no solution for monitoring fractures in the transmission system.

[0046] To address the aforementioned issues, this disclosure provides a method, device, storage medium, and vehicle for monitoring a vehicle's transmission system. This method can detect whether the vehicle's transmission system is about to fail. If impending failure is detected, it alerts the driver to repair the vehicle promptly. Furthermore, it can limit the vehicle's speed to prevent accidents caused by transmission system failure during driving.

[0047] Figure 2 This is a flowchart illustrating a method for monitoring the transmission system of a vehicle according to an exemplary embodiment. See also... Figure 2 The method for monitoring the transmission system of this vehicle may include the following steps:

[0048] In step S210, the rotational speed data of the drive shaft within a preset time period is obtained, and the rotational angle data of the drive shaft is obtained based on the rotational speed data.

[0049] In this embodiment of the disclosure, the vehicle's transmission system may include a driveshaft, which is a crucial component in the automotive transmission system for transmitting power. Its function, together with the gearbox and drive axle, is to transmit the engine's power to the wheels, thereby generating driving force for the vehicle. Therefore, the health of the driveshaft has a significant impact on vehicle safety.

[0050] As an alternative approach, when the vehicle is detected to be in motion, embodiments of this disclosure can determine whether the drive shaft has a reverse torque. If it is determined that the vehicle has a reverse torque, the rotational speed data of the drive shaft within a preset time period can be obtained.

[0051] Optionally, when it is determined that the vehicle has a reverse torque, this embodiment of the disclosure may further determine whether the value of the reverse torque exceeds a preset torque. When it is determined that the value of the reverse torque of the driveshaft exceeds the preset torque, this embodiment of the disclosure may obtain the rotational speed data of the driveshaft within a preset time period.

[0052] The reverse torque can be generated during vehicle braking. Therefore, in determining whether the driveshaft has reverse torque, this embodiment of the present disclosure can determine whether the vehicle is in a braking state, that is, detect whether the vehicle's brake pedal is depressed. If it is determined that the vehicle is in a braking state, it means that the vehicle has reverse torque generated at this time. Based on this, the magnitude of the reverse torque is obtained, and it is determined whether the magnitude exceeds a preset torque. When it is determined that the value of the reverse torque is greater than the preset torque, the rotational speed data of the driveshaft within a preset time period is obtained.

[0053] Optionally, if the reverse torque value is determined to be greater than a preset torque, this embodiment of the present disclosure can also obtain the vehicle's braking time, and based on this, determine whether the vehicle's braking time exceeds a preset braking time. If it is determined that the vehicle's braking time exceeds the preset braking time, then the rotational speed data of the driveshaft within a preset time period is obtained. Here, the determination of reverse torque can be a brake recovery enable determination, that is, determining that energy recovery is enabled. If energy recovery is enabled, then the rotational speed data of the driveshaft within a specified time period is obtained.

[0054] For example, if it is determined that the vehicle's braking time is greater than 5 seconds, the rotational speed data of the drive shaft within a preset time period is obtained.

[0055] As an alternative approach, when the vehicle is detected to be in motion and the driveshaft has reverse torque, this embodiment of the disclosure can determine whether a vehicle malfunction has occurred. If a malfunction is determined, the malfunction level is obtained. If the malfunction level is determined to be less than a preset level, the rotational speed data of the driveshaft within a preset time period is obtained. Conversely, if the malfunction level is determined to be greater than the preset level, this embodiment of the disclosure can directly output malfunction warning information, such as outputting the malfunction through an instrument panel.

[0056] In other words, when the fault level of a vehicle is determined to be greater than a preset level, the embodiments of this disclosure may not perform the operation of acquiring rotational speed data, so as to reduce vehicle wear and tear.

[0057] When the driveshaft experiences reverse torque and the fault level is less than a preset level, speed data is acquired, and based on this speed data, it is determined whether an abnormality has occurred in the transmission system. This not only protects the vehicle's safe operation by preventing driveshaft system breakage, but also directly outputs fault warning information when the fault level is greater than the preset level, enabling users to quickly identify the fault and repair it in a timely manner. It also avoids unnecessary transmission system monitoring operations. For example, the preset level can be level 3.

[0058] It should be noted that the fault level in this embodiment can be the vehicle's fault level, that is, the overall fault level obtained when the vehicle malfunctions. Optionally, the fault level can also be the fault level of the transmission system, which can be determined based on the sound signals on the driveshaft during vehicle start-up or driving.

[0059] Specifically, if a gear shift is triggered during vehicle start-up or driving, a knocking sound can be detected on the driveshaft. If a knocking sound is detected on the driveshaft during both start-up and driving, it indicates a vehicle malfunction, and the malfunction level is relatively high.

[0060] Optionally, if no abnormal noise is detected when the vehicle starts, but an impact sound is detected in the drive shaft during driving, it is also determined that the vehicle has a fault. In this case, the fault level can be lower than the fault level in the previous case.

[0061] It should be noted that, in determining whether a transmission system fault has occurred, this embodiment of the present disclosure can acquire the sound level of an audio signal, and based on this sound level, obtain the fault level. Here, the sound level and the fault level can be directly proportional; that is, the higher the sound level, the higher the fault level.

[0062] As an alternative approach, upon detecting that the vehicle is in motion, this embodiment of the disclosure can acquire the vehicle's speed and, based on this, determine whether the vehicle's speed exceeds a preset speed. If it is determined that the vehicle's speed exceeds the preset speed, and if a reverse torque is detected in the drive shaft, then the rotational speed data of the drive shaft within a preset time period is acquired.

[0063] After determining that the driving speed exceeds the preset speed, by detecting whether the drive shaft has reverse torque, not only can vehicle energy loss be reduced, but the obtained speed data can also be made more accurate.

[0064] During this process, the embodiments of this disclosure can also obtain the vehicle's gear position and determine whether the vehicle's gear position is a specified gear. If the vehicle's gear position is a specified gear, it is determined whether the vehicle's driving speed exceeds a preset speed. The vehicle can be in a driving state when it is in the specified gear.

[0065] For example, when the vehicle is detected to be driving in D gear, this embodiment of the present disclosure can determine whether the vehicle speed is greater than 20 km / h. If the vehicle speed is determined to be greater than 20 km / h, this embodiment of the present disclosure can obtain the rotational speed data of the drive shaft within a preset time period when it is determined that the vehicle has reverse torque.

[0066] It should be noted that, before determining whether the vehicle is in motion, this embodiment of the disclosure may first determine whether the vehicle is under high voltage. If it is determined that the vehicle is under high voltage, the vehicle's gear position is obtained, and it is determined whether the gear is a specified gear. In other words, when high voltage is detected on the vehicle, this embodiment of the disclosure can perform a gear position determination operation.

[0067] In summary, the embodiments of this disclosure can determine whether to acquire the rotational speed data of the driveshaft within a preset time period by comprehensively considering at least one of the following: reverse torque, vehicle fault level, and driving speed. In this process, reverse torque can be the basis for the determination.

[0068] As a specific method, when the vehicle is in motion, its speed is acquired. If this speed is greater than a preset speed, the system checks for reverse torque. If reverse torque is detected, the vehicle's fault level is determined, and it is then determined whether this fault level is less than a preset level. If the fault level is determined to be less than the preset level, the driveshaft's rotational speed data within a preset time period is acquired.

[0069] In some embodiments, after obtaining the rotational speed data of the driveshaft, the present disclosure embodiments can obtain the rotational angle data of the driveshaft based on the rotational speed data. Specifically, there can be a corresponding relationship between the rotational speed data and the rotational angle data. After obtaining the rotational speed data, the corresponding rotational angle data can be obtained by looking up a table. The correspondence between the rotational speed data and the rotational angle data can be obtained through multiple tests before the vehicle leaves the factory. Optionally, the rotational angle data of the driveshaft can also be determined based on the rotational speed data and the duration of a preset time period.

[0070] In step S220, if it is determined that the cornering data meets the preset conditions, the fault count value is updated.

[0071] As an optional approach, after obtaining the rotation angle data of the drive shaft, this embodiment of the disclosure can also determine whether the rotation angle data meets preset conditions. If it is determined that the rotation angle data meets the preset conditions, the fault count value is updated. The fault count value is used to characterize the number of rotation angle data points that exceed the preset conditions.

[0072] This embodiment of the disclosure can monitor the vehicle's transmission system in real time when the vehicle is detected to be in motion. Furthermore, this embodiment can acquire one speed data point each time the vehicle brakes. During braking, the vehicle's torque can change from a positive to a negative value. That is, whenever the vehicle's torque changes from a positive to a negative value, the vehicle can acquire one speed data point, thus performing a fault count update operation.

[0073] As an example, when the vehicle brakes for the first time, if the steering angle data meets the preset conditions, the fault count can be updated to 1; when the vehicle brakes for the second time, if the steering angle data meets the preset conditions, the fault count can be updated to 2, and so on.

[0074] It should be noted that, in this embodiment, when the angle data meets the preset conditions, the fault count is incremented by 1; conversely, when the angle data does not meet the preset conditions, the fault count is decremented by 1. When the fault count is updated to zero, it indicates that the fault has been resolved, and the abnormal monitoring for this cycle ends. This allows for quick identification of the fault resolution status. The preset conditions can be that the angle data exceeds a preset threshold; that is, if the angle value of the drive shaft exceeds a preset threshold, it indicates that the angle data meets the preset conditions.

[0075] As an example, if the number of times the steering angle data meets the preset conditions is recorded as 6, the corresponding fault count value is 6. By comparison, it is determined that the fault count value of 6 is greater than the abnormal threshold of 5. At this point, the vehicle's driving torque can be reduced. During this process, if the steering angle data is detected to not meet the preset conditions, the fault count value can be decremented by 1. If the fault count value is updated to 0, it indicates that the abnormality of the transmission system has been resolved in a timely manner.

[0076] As an alternative approach, when the cornering data meets preset conditions, this embodiment of the present disclosure can update the abnormal count value, and when the abnormal count value exceeds a first preset threshold, reduce the vehicle's driving torque. Subsequently, this embodiment of the present disclosure can also continuously monitor the cornering data, and when it is determined that the real-time acquired cornering data does not meet preset conditions, update the normal count value.

[0077] Here, if the updated normal count value exceeds the second preset threshold, the abnormal count value can be reset to zero. A zero abnormal count value indicates that the abnormality has been resolved. By determining whether the normal count value exceeds the second preset threshold, it is possible to monitor whether the abnormality in the transmission system has been resolved. In other words, by monitoring whether the abnormal count value has been reset to zero, it is possible to quickly determine whether the transmission system has returned to normal operation.

[0078] It should be noted that, in the process of clearing the abnormal count value to zero, the normal count value can also be cleared to zero in this embodiment of the disclosure. Optionally, after determining that the abnormal count value exceeds the first preset threshold and reduces the vehicle's driving torque, the normal count value can also be cleared to zero in this embodiment of the disclosure.

[0079] In step S230, it is determined that the updated fault count value exceeds the abnormal threshold, and the vehicle's driving torque is reduced.

[0080] As an optional approach, after performing the fault count update operation, embodiments of this disclosure can determine whether the updated fault count exceeds an abnormal threshold. If it is determined that the updated fault count exceeds the abnormal threshold, embodiments of this disclosure can reduce the vehicle's driving torque.

[0081] Here, the updated fault count value can be the value after the fault count value has increased. If the fault count value has decreased, the fault count value judgment operation can be omitted in this embodiment of the disclosure, that is, it is not necessary to determine whether the updated fault count value exceeds the abnormal threshold.

[0082] In addition, if the updated fault count value is determined to exceed the abnormal threshold, the embodiments of this disclosure can reduce the vehicle's driving torque. Based on this, a fault reminder is output through the instrument panel, i.e., the instrument panel reports a fault.

[0083] In summary, when the rotation angle of the vehicle driveshaft exceeds the normal state, the embodiments of this disclosure can trigger an alarm via the instrument malfunction indicator light, and when it is determined that the driveshaft is in an abnormal state, the vehicle's driving torque can be reduced, which can not only protect the vehicle's driving safety but also prevent the driveshaft system from breaking.

[0084] It should be noted that when the updated fault count value exceeds the abnormal threshold, this embodiment of the disclosure can also acquire vibration data on the drive shaft and determine whether the vibration data exceeds the vibration threshold. If the vibration data exceeds the vibration threshold, this embodiment of the disclosure can acquire the wear amount of the drive shaft. If the wear amount of the drive shaft exceeds the standard, and the vehicle's load does not exceed the preset load, the vehicle's driving torque can be reduced. The preset load can be matched to the vehicle's model.

[0085] This embodiment of the disclosure can accurately and effectively monitor transmission system faults based on angle data. Specifically, it acquires the rotational speed data of the drive shaft within a preset time period, and acquires the rotational angle data of the drive shaft based on the rotational speed data. If it is determined that the rotational angle data meets the preset conditions, the fault count value is updated. Finally, if it is determined that the updated fault count value exceeds the abnormal threshold, the vehicle's driving torque is reduced, thus ensuring vehicle safety to a certain extent.

[0086] Figure 3 This is a flowchart illustrating another method for monitoring the transmission system of a vehicle according to an exemplary embodiment. See also... Figure 3 The method for monitoring the transmission system of this vehicle may include the following steps:

[0087] In step S310, the vehicle's torque zero-crossing window is obtained.

[0088] In this embodiment of the disclosure, the torque zero-crossing window can be a time or angle range during which the torque changes from a positive value to a negative value (or from a negative value to a positive value) and passes through zero. The torque zero-crossing window allows for more accurate signal determination.

[0089] In some implementations, when a driveshaft malfunctions, the anomaly is usually more pronounced at zero crossings, meaning the change in the driveshaft's angle data is more significant within the zero-crossing window. In other words, identifying this change at the point where positive and negative torques intersect allows for more accurate acquisition of the driveshaft's angle data.

[0090] Here, the vehicle's torque zero-crossing window can be preset, such as ranging from 30 Nm to -30 Nm. Optionally, this torque zero-crossing window can also be determined based on the vehicle's usage time; for example, the shorter the usage time, the smaller the corresponding zero-crossing window; and the longer the usage time, the larger the corresponding zero-crossing window. In other words, the torque zero-crossing window can be adjusted in real time. For instance, the torque zero-crossing window may differ depending on the vehicle's condition. For example, different vehicle loads will result in different torque zero-crossing windows; a heavier load corresponds to a larger torque zero-crossing window, and vice versa.

[0091] In this embodiment of the disclosure, the zero-crossing torque window of the vehicle can correspond to a first driveshaft speed and a second driveshaft speed, wherein the first driveshaft speed can be greater than the second driveshaft speed, the time point corresponding to the first driveshaft speed can be the start time of a preset time period, and the time point corresponding to the second driveshaft speed can be the end time of the preset time period.

[0092] For example, the first drive shaft speed can be the maximum drive shaft speed, and the second drive shaft speed can be the minimum drive shaft speed. Continuing with the above example, the first drive shaft speed can be the drive shaft speed when the torque is 30 Nm, and the second drive shaft speed can be the drive shaft speed when the torque is -30 Nm.

[0093] In summary, the embodiments of this disclosure can monitor the torque zero-crossing window, that is, monitor whether the vehicle has passed through the zero-crossing torque control window. During this process, if the vehicle is detected to have passed through positive or negative torque zero, the zero-crossing window is enabled, and the driveshaft speed data is acquired in this state.

[0094] In step S320, the average speed fluctuation is determined based on the first and second drive shaft speeds corresponding to the torque zero-crossing window, and the average speed fluctuation is used as the speed data.

[0095] As described above, the torque zero-crossing window can correspond to the first drive shaft speed and the second drive shaft speed. In this embodiment, the average speed fluctuation can be determined based on the first drive shaft speed and the second drive shaft speed.

[0096] For example, the average speed fluctuation can be determined based on the maximum and minimum drive shaft speeds within the zero-crossing window. That is, the average speed fluctuation can be the average of the first drive shaft speed and the second drive shaft speed, and this average value can be used as speed data.

[0097] In step S330, the rotation angle of the drive shaft is determined based on the average rotational speed fluctuation and the time of the torque zero-crossing window.

[0098] In this embodiment of the present disclosure, the rotation angle data of the drive shaft can be determined based on the average rotational speed fluctuation and the time of the torque zero-crossing window. Specifically, in this embodiment of the present disclosure, the rotation angle value of the drive shaft can be determined based on the average rotational speed fluctuation and the time of the torque zero-crossing window, wherein the time of the torque filtering window can be the duration corresponding to a preset time period.

[0099] For example, if the time at the first drive shaft speed corresponding to the torque zero-crossing window is T1 and the time at the second drive shaft speed is T2, then the time of the torque zero-crossing window is T2-T1.

[0100] In some implementations, the mean speed fluctuation, the time of the torque filtering window, and the driveshaft angle can satisfy the following formula:

[0101] Average speed fluctuation (n) = Drive shaft angle (α) / Torque filtering window time (t) * 2π;

[0102] Based on the above formula, the driveshaft angle data can be obtained from the average speed fluctuation and the time of the torque filtering window. Here, the angle data can be the rate of change of the driveshaft angle.

[0103] In step S340, if it is determined that the angle data meets the preset conditions, the fault count value is updated.

[0104] In step S350, it is determined that the updated fault count value exceeds the abnormal threshold, and the vehicle's driving torque is reduced.

[0105] The specific implementation methods of steps S340 to S350 have been described in detail in the above embodiments, and will not be repeated here.

[0106] To better illustrate the monitoring process of the transmission system, the embodiments of this disclosure provide, as follows: Figure 4 The example diagram shown is based on Figure 4 It is known that when high voltage is detected on a vehicle, it can be determined whether the vehicle meets at least one of the following conditions: whether the vehicle is in D gear; whether the vehicle speed is greater than 20 km / h; whether the vehicle braking time is greater than 5 seconds; whether energy recovery is enabled; and whether the fault level is less than 3.

[0107] As an example, in the case that the drive shaft is determined to have a reverse torque, the embodiments of this disclosure can determine whether the value of the reverse torque exceeds a preset torque, and if it exceeds the preset torque, obtain the rotational speed data of the drive shaft within a preset time period.

[0108] As another example, if it is determined that the driveshaft has a reverse torque, and a vehicle malfunction is detected, this embodiment of the disclosure can determine whether the malfunction level is less than level 3. If it is less than level 3, the rotational speed data of the driveshaft within a preset time period is obtained.

[0109] As another example, if it is detected that the vehicle is in motion and the speed exceeds 20 km / h, and if it is determined that the driveshaft has reverse torque, the rotational speed data of the driveshaft within a preset time period can be obtained.

[0110] If at least one of the above conditions is met, this embodiment of the present disclosure can perform torque zero-crossing window monitoring, that is, determine the torque zero-crossing window, and based on this, obtain the maximum and minimum drive shaft speeds corresponding to the zero-crossing window, and calculate the average speed fluctuation value based on the maximum and minimum drive shaft speeds. The drive shaft angle value can be determined based on the average speed fluctuation value and the window time.

[0111] Alternatively, if the above conditions are not met, the process can be terminated, in which case the speed data acquisition operation is not required. For example, the process can terminate when the vehicle speed is determined to be >20km / h.

[0112] After obtaining the rotation angle value, this embodiment of the present disclosure can determine whether the rotation angle value of the drive shaft exceeds a preset threshold. If it is determined that the rotation angle of the drive shaft exceeds the preset threshold, this embodiment of the present disclosure can increment the fault count value by 1. Conversely, if it is determined that the rotation angle of the drive shaft does not exceed the preset threshold, this embodiment of the present disclosure can decrement the fault count value by 1.

[0113] In addition, after incrementing the fault count by 1, this embodiment of the disclosure can determine whether the fault count is greater than 5. If the fault count is greater than 5, a fault in the transmission system is determined, and a speed limiting and torque reduction operation can be performed, while the instrument panel can report a fault. Furthermore, the vehicle's malfunction indicator lamp can be illuminated at this time. Optionally, if the fault count is less than 5, the process ends, and this embodiment of the disclosure can save the updated fault count for use in the next monitoring session.

[0114] By monitoring the rotational angle data of the driveshaft, embodiments of this disclosure can diagnose signs of impending hardware failure and remind the driver to repair the vehicle in a timely manner. Additionally, the controller system can limit the vehicle's high-speed travel to prevent transmission system failure during driving and thus avoid accidents.

[0115] In other words, this embodiment of the present disclosure can identify abnormal conditions of the driveshaft through the vehicle fault diagnosis electronic control unit and trigger a warning on the vehicle's instrument panel when an abnormal condition occurs. Furthermore, this embodiment of the present disclosure can reduce transmission torque, protect vehicle driving safety, prevent driveshaft breakage during driving and resulting safety accidents, and ensure the safety of personnel and the vehicle.

[0116] In this embodiment, the vehicle system controller can monitor abnormal driveshaft angle conditions. When an abnormal driveshaft angle is detected, it can report a fault and reduce the vehicle's driving torque, alerting the driver and preventing further deterioration of the driveshaft under high torque driving. The control logic can monitor abnormal driveshaft angle faults and alert the driver to promptly repair and inspect the driveshaft. Furthermore, this embodiment can protect the vehicle driveshaft from high-torque breakage, reduce vehicle driving torque, and prevent driving accidents.

[0117] Figure 5 This is a block diagram illustrating a vehicle transmission system monitoring device according to an exemplary embodiment, wherein the transmission system may include a drive shaft, such as... Figure 5 As shown, the vehicle transmission system monitoring device 500 may include an acquisition module 510, an update module 520, and a processing module 530.

[0118] The acquisition module 510 is configured to acquire the rotational speed data of the drive shaft within a preset time period, and acquire the rotational angle data of the drive shaft based on the rotational speed data;

[0119] The update module 520 is configured to update the fault count value if it is determined that the corner data meets a preset condition;

[0120] The processing module 530 is configured to determine that the updated fault count value exceeds an abnormal threshold and reduce the vehicle's driving torque.

[0121] In some embodiments, the vehicle's transmission system monitoring device 500 may further include:

[0122] The window acquisition module is configured to acquire the torque zero-crossing window of the vehicle. The torque zero-crossing window corresponds to a first driveshaft speed and a second driveshaft speed. The first driveshaft speed is greater than the second driveshaft speed. The time point corresponding to the first driveshaft speed is the start time of the preset time period, and the time point corresponding to the second driveshaft speed is the end time of the preset time period.

[0123] In some implementations, the acquisition module 510 may be configured to determine the average speed fluctuation based on the first drive shaft speed and the second drive shaft speed corresponding to the torque zero-crossing window, and use the average speed fluctuation as the speed data.

[0124] In some implementations, the acquisition module 510 may also be configured to determine the rotational angle of the drive shaft based on the average rotational speed fluctuation and the time of the torque zero-crossing window.

[0125] In some implementations, the acquisition module 510 may also be configured to determine that the drive shaft has a reverse torque and acquire the rotational speed data of the drive shaft within a preset time period.

[0126] In some implementations, the acquisition module 510 may include:

[0127] The fault level acquisition submodule is configured to acquire the fault level of the vehicle when it is determined that the drive shaft has the reverse torque and the vehicle has a fault.

[0128] The rotational speed acquisition submodule is configured to determine that the fault level is less than a preset level and acquire the rotational speed data of the drive shaft within a preset time period.

[0129] In some embodiments, the acquisition module 510 may also be configured to acquire the vehicle's speed when the vehicle is in motion; and to acquire the rotational speed data of the drive shaft within a preset time period when it is determined that the speed exceeds a preset speed and the drive shaft has the reverse torque.

[0130] This embodiment of the disclosure can accurately and effectively monitor transmission system faults based on angle data. Specifically, it acquires the rotational speed data of the drive shaft within a preset time period, and acquires the rotational angle data of the drive shaft based on the rotational speed data. If it is determined that the rotational angle data meets the preset conditions, the fault count value is updated. Finally, if it is determined that the updated fault count value exceeds the abnormal threshold, the vehicle's driving torque is reduced, thus ensuring vehicle safety to a certain extent.

[0131] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0132] Figure 6 This is a block diagram illustrating a vehicle 600 according to an exemplary embodiment. For example, vehicle 600 can be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicle. Vehicle 600 can be an autonomous vehicle or a semi-autonomous vehicle.

[0133] Reference Figure 6The vehicle 600 may include various subsystems, such as an infotainment system 610, a perception system 620, a decision control system 630, a drive system 640, and a computing platform 650. The vehicle 600 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and each component of the vehicle 600 can be interconnected via wired or wireless means.

[0134] In some embodiments, the infotainment system 610 may include a communication system, an entertainment system, and a navigation system, etc.

[0135] The perception system 620 may include several sensors for sensing information about the environment surrounding the vehicle 600. For example, the perception system 620 may include a global positioning system (which may be GPS, BeiDou, or other positioning systems), an inertial measurement unit (IMU), lidar, millimeter-wave radar, ultrasonic radar, and a camera device.

[0136] The decision control system 630 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0137] The drive system 640 may include components that provide powered motion to the vehicle 600. In one embodiment, the drive system 640 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0138] Some or all of the functions of vehicle 600 are controlled by computing platform 650. Computing platform 650 may include at least one processor 651 and memory 652, processor 651 can execute instructions 653 stored in memory 652.

[0139] Processor 651 can be any conventional processor, such as a commercially available CPU. Processors may also include graphics processing units (GPUs), field-programmable gate arrays (FPGAs), systems-on-chips (SoCs), application-specific integrated circuits (ASICs), or combinations thereof.

[0140] The memory 652 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0141] In addition to instruction 653, memory 652 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 652 can be used by computing platform 650.

[0142] In this embodiment of the disclosure, the processor 651 may execute instructions 653 to complete all or part of the steps of the above-described method for monitoring the transmission system of a vehicle.

[0143] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, which, when executed by a processor, implement the steps of the vehicle transmission system monitoring method described above. For example, the computer-readable storage medium may be the memory 652 including program instructions, which may be executed by the processor 651 of the vehicle 600 to complete the vehicle transmission system monitoring method described above.

[0144] In another exemplary embodiment, a computer program product is also provided, which includes a computer program executable by a processor, which, when executed by the processor, implements the steps of the above-described vehicle transmission system monitoring method.

[0145] The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0146] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this disclosure will not describe the various possible combinations separately.

[0147] Furthermore, various different embodiments of this disclosure can be combined in any way, as long as they do not violate the spirit of this disclosure, they should also be regarded as the content disclosed in this disclosure.

Claims

1. A method of monitoring a drivetrain system of a vehicle, characterized by, The transmission system comprises a transmission shaft, and the method comprises: obtaining a torque zero-crossing window of the vehicle, the torque zero-crossing window corresponding to a first transmission shaft speed and a second transmission shaft speed; obtaining speed data of the transmission shaft within a preset time period, and obtaining angle data of the transmission shaft based on the speed data; the obtaining of the speed data of the transmission shaft within the preset time period comprises: determining a speed fluctuation average value according to the first transmission shaft speed and the second transmission shaft speed corresponding to the torque zero-crossing window, and taking the speed fluctuation average value as the speed data; the obtaining of the angle data of the transmission shaft based on the speed data comprises: determining an angle value of the transmission shaft according to the speed fluctuation average value and the time of the torque zero-crossing window; if it is determined that the angle data meets a preset condition, updating a fault count value; determining that the updated fault count value exceeds an abnormal threshold, and reducing a driving torque of the vehicle.

2. The method of claim 1, wherein, The first transmission shaft speed is greater than the second transmission shaft speed, a time point corresponding to the first transmission shaft speed is a start time of the preset time period, and a time point corresponding to the second transmission shaft speed is an end time of the preset time period.

3. The method of claim 1, wherein, The obtaining of the speed data of the transmission shaft within the preset time period further comprises: determining that the transmission shaft has a reverse torque, and obtaining the speed data of the transmission shaft within the preset time period.

4. The method of claim 3, wherein, The determining that the transmission shaft has the reverse torque and the obtaining of the speed data of the transmission shaft within the preset time period comprise: when it is determined that the transmission shaft has the reverse torque and the vehicle is faulty, obtaining a fault level of the vehicle; determining that the fault level is less than a preset level, and obtaining the speed data of the transmission shaft within the preset time period.

5. The method of claim 3, wherein, The determining that the transmission shaft has the reverse torque and the obtaining of the speed data of the transmission shaft within the preset time period further comprise: when the vehicle is in a driving state, obtaining a driving speed of the vehicle; determining that the driving speed exceeds a preset speed and the transmission shaft has the reverse torque, and obtaining the speed data of the transmission shaft within the preset time period.

6. A drive system monitoring apparatus of a vehicle characterized by comprising: The transmission system comprises a transmission shaft, and the device comprises: a window obtaining module configured to obtain a torque zero-crossing window of the vehicle, the torque zero-crossing window corresponding to a first transmission shaft speed and a second transmission shaft speed; an obtaining module configured to obtain speed data of the transmission shaft within a preset time period, and obtain angle data of the transmission shaft based on the speed data; determine a speed fluctuation average value according to the first transmission shaft speed and the second transmission shaft speed corresponding to the torque zero-crossing window, and take the speed fluctuation average value as the speed data; and determine an angle value of the transmission shaft according to the speed fluctuation average value and the time of the torque zero-crossing window; an updating module configured to update a fault count value if it is determined that the angle data meets a preset condition; a processing module configured to determine that the updated fault count value exceeds an abnormal threshold, and reduce a driving torque of the vehicle.

7. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program, when executed by the processor, implements the steps of the method of any one of claims 1-5.

8. A vehicle characterized by comprising: comprising: a memory having stored thereon a computer program; a processor configured to execute the computer program in the memory to implement the steps of the method of any one of claims 1-5.

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