Vehicle transmission system monitoring method and device, storage medium and vehicle

Abstract

The invention relates to a vehicle transmission system monitoring method and device, a storage medium and a vehicle, a transmission system comprises a transmission shaft, and the method comprises the steps that rotating speed data of the transmission shaft in a preset time period are acquired, and rotating angle data of the transmission shaft are acquired based on the rotating speed data; if it is determined that the rotation angle data meet the preset condition, updating a fault count value; and when it is determined that the updated fault count value exceeds an abnormal threshold value, the driving torque of the vehicle is reduced. The transmission shaft can be effectively prevented from being broken by monitoring the rotation angle data of the transmission shaft.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle monitoring, and in particular, to a method, a device, a storage medium and a vehicle for monitoring a transmission system of a vehicle. Background Art

[0002] The transmission system is an important part of the vehicle, which is mainly used to transfer the power and torque generated by the engine to the wheels to drive the vehicle. In addition to the transmission, universal joint, drive shaft and drive axle, the transmission system can also include the rear axle main reducer, differential and half shafts. During the operation of the vehicle, the motor will generate high torque drive and feedback, which will cause wear on the transmission system. When the wear of the transmission system reaches a certain level, it will break. Therefore, how to better monitor the transmission system is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the present disclosure is to provide a vehicle transmission system monitoring method, device, storage medium and vehicle to solve the above technical problems.

[0004] In order to achieve the above-mentioned object, the present disclosure provides a first aspect of a vehicle transmission system monitoring method, wherein the transmission system includes a transmission shaft, and the method includes: Acquiring speed data of the transmission shaft within a preset time period, and acquiring rotation angle data of the transmission shaft based on the speed data; If it is determined that the rotation angle data meets the preset condition, updating the fault count value; It is determined that the updated fault count value exceeds an abnormal threshold, and the driving torque of the vehicle is reduced.

[0005] Optionally, the method comprises: A torque zero-crossing window of the vehicle is obtained, wherein the torque zero-crossing window corresponds to a first transmission shaft speed and a second transmission shaft speed, wherein the first transmission shaft speed is greater than the second transmission shaft speed, and the time point corresponding to the first transmission shaft speed is the start time of the preset time period, and the time point corresponding to the second transmission shaft speed is the end time of the preset time period.

[0006] Optionally, obtaining the rotation speed data of the transmission shaft within a preset time period includes: A speed fluctuation mean is determined according to the first transmission shaft speed and the second transmission shaft speed corresponding to the torque zero-crossing window, and the speed fluctuation mean is used as the speed data.

[0007] Optionally, the acquiring the rotation speed data of the transmission shaft within a preset time period further includes: It is determined that the transmission shaft has a reverse torque, and the rotation speed data of the transmission shaft within a preset time period is obtained.

[0008] Optionally, the determining that the transmission shaft has reverse torque and acquiring rotation speed data of the transmission shaft within a preset time period includes: When it is determined that the transmission shaft has the reverse torque and the vehicle fails, obtaining a failure level of the vehicle; It is determined that the fault level is less than a preset level, and the rotation speed data of the transmission shaft within a preset time period is obtained.

[0009] Optionally, the determining that the transmission shaft has reverse torque and acquiring the rotation speed data of the transmission shaft within a preset time period further includes: When the vehicle is in a driving state, obtaining a driving speed of the vehicle; When it is determined that the driving speed exceeds the preset speed and the transmission shaft has the reverse torque, the rotation speed data of the transmission shaft within a preset time period is acquired.

[0010] In a second aspect, the present disclosure provides a transmission system monitoring device for a vehicle, wherein the transmission system includes a transmission shaft, and the device includes: an acquisition module, configured to acquire rotation speed data of the transmission shaft within a preset time period, and acquire rotation angle data of the transmission shaft based on the rotation speed data; An updating module, configured to update the fault count value if it is determined that the turning angle data satisfies a preset condition; The processing module is configured to determine that the updated fault count value exceeds an abnormal threshold and reduce the driving torque of the vehicle.

[0011] In a third aspect, the present disclosure provides a computer-readable storage medium having a computer program stored thereon, which implements the method described in the first aspect when the computer program is executed by a processor.

[0012] In a fourth aspect, the present disclosure provides a vehicle, the vehicle comprising: a memory having a computer program stored thereon; A processor is used to execute the computer program in the memory to implement the steps of the method described in the first aspect.

[0013] In a fifth aspect, the present disclosure provides a computer program product, including a computer program, which implements the method described in the first aspect when executed by a processor.

[0014] The present invention can accurately and effectively monitor transmission system faults based on angle data. Specifically, the rotation speed data of the transmission shaft within a preset time period is obtained, and the rotation angle data of the transmission shaft is obtained based on the rotation speed data. If it is determined that the rotation 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, which can ensure vehicle safety to a certain extent.

[0015] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 This is a diagram showing an example of the structure of a transmission system in a vehicle.

[0017] Figure 2 The figure is a flow chart of a method for monitoring a transmission system of a vehicle according to an exemplary embodiment.

[0018] Figure 3 The figure is a flow chart of another method for monitoring a transmission system of a vehicle according to an exemplary embodiment.

[0019] Figure 4 It is a specific flow chart of another method for monitoring a transmission system of a vehicle according to an exemplary embodiment.

[0020] Figure 5 The figure is a block diagram of a vehicle transmission system monitoring device according to an exemplary embodiment.

[0021] Figure 6 is a block diagram of a vehicle according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0022] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0023] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments described herein, which are instead provided for a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0024] It should be understood that the various steps described in the method embodiments of the present disclosure may be performed in different orders and / or in parallel. In addition, the method embodiments may include additional steps and / or omit the steps shown. The scope of the present disclosure is not limited in this respect.

[0025] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part 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". The relevant definitions of other terms will be given in the following description.

[0026] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0027] In the related art, the transmission system may include Figure 1 In addition to the transmission, universal joint, transmission shaft and drive axle shown, it may also include a rear axle main reduction gear, a differential and half shafts.

[0028] When the vehicle is driving under heavy load, the motor will generate high torque drive and feedback, which will lead to increased wear of the transmission system. Long-term wear will cause the free rotation angle of the transmission shaft to exceed the normal state, which will lead to rear axle knocking. Moreover, when the wear exceeds a certain level, the vehicle's transmission system will break, endangering vehicle safety.

[0029] In the related technology, the vehicle motor can drive the vehicle and also brake the negative torque to recover the vehicle's kinetic energy. However, the positive and negative loads have high requirements on the strength of the vehicle's rear axle. Since the reverse strength of the gear is low, it is difficult to withstand torque and impact, and the gear system is prone to deformation and breakage. In addition, during the heavy-load braking process of the vehicle, the rear axle gear cross shaft is very likely to break, posing a serious safety hazard. At present, fault detection mainly revolves around motors, batteries, electronic controls, etc., but there is no solution to monitor the fracture of the transmission system.

[0030] In order to solve the above problems, the embodiments of the present disclosure propose a vehicle transmission system monitoring method, device, storage medium and vehicle, which can detect whether the vehicle's transmission system is about to be damaged. If it is detected that it is about to be damaged, the driver is reminded to repair the vehicle in time. At the same time, the vehicle's driving speed can be limited to prevent accidents caused by transmission system breakage during driving.

[0031] Figure 2FIG. 1 is a flow chart of a method for monitoring a vehicle transmission system according to an exemplary embodiment. Figure 2 , the vehicle transmission system monitoring method may include the following steps: In step S210, the rotation speed data of the transmission shaft within a preset time period is acquired, and the rotation angle data of the transmission shaft is acquired based on the rotation speed data.

[0032] In the disclosed embodiment, the transmission system of the vehicle may include a transmission shaft, which is an important component for transmitting power in the vehicle transmission system. Its function is to transmit the power of the engine to the wheels together with the gearbox and the drive axle, so that the vehicle generates driving force. It can be seen that the health of the transmission shaft has a huge impact on the safety of the vehicle.

[0033] As an optional method, when it is detected that the vehicle is in a driving state, the embodiment of the present disclosure can determine whether the transmission shaft has a reverse torque. If it is determined that the vehicle has a reverse torque, the rotational speed data of the transmission shaft within a preset time period can be obtained.

[0034] Optionally, when determining that the vehicle has reverse torque, the embodiment of the present disclosure may also continue to determine whether the value of the reverse torque exceeds the preset torque. When determining that the value of the reverse torque of the transmission shaft exceeds the preset torque, the embodiment of the present disclosure may obtain the rotation speed data of the transmission shaft within a preset time period.

[0035] Among them, the reverse torque can be generated when the vehicle brakes, so in the process of determining whether the transmission shaft has the reverse torque, the embodiment of the present disclosure can determine whether the vehicle is in a braking state, that is, detect whether the brake pedal of the vehicle is pressed. If it is determined that the vehicle is in a braking state, it means that the vehicle has a reverse torque generated at this time. On this basis, the magnitude of the reverse torque is obtained, and it is determined whether the magnitude exceeds the preset torque. When it is determined that the value of the reverse torque is greater than the preset torque, the speed data of the transmission shaft within a preset time period is obtained.

[0036] Optionally, when it is determined that the value of the reverse torque is greater than the preset torque, the embodiment of the present disclosure may also obtain the braking time of the vehicle, and on this basis, determine whether the braking time of the vehicle exceeds the preset braking time. If it is determined that the braking time of the vehicle exceeds the preset braking time, the speed data of the transmission shaft within the preset time period is obtained. Here, the judgment of the reverse torque can be a judgment on whether the braking recovery is enabled, that is, determining whether the energy recovery is enabled, and if the energy recovery is enabled, the speed data of the transmission shaft within the specified time period is obtained.

[0037] Exemplarily, if it is determined that the braking time of the vehicle is greater than 5 seconds, the rotation speed data of the transmission shaft within a preset time period is acquired.

[0038] As another optional method, when it is detected that the vehicle is in a driving state and the transmission shaft has reverse torque, the embodiment of the present disclosure can determine whether the vehicle has a fault. If it is determined that the vehicle has a fault, the fault level is obtained. If it is determined that the fault level is less than a preset level, the speed data of the transmission shaft within a preset time period is obtained. Conversely, if it is determined that the fault level of the vehicle is greater than the preset level, the embodiment of the present disclosure can directly output fault prompt information, such as outputting the fault through an instrument.

[0039] That is to say, when it is determined that the fault level of the vehicle is greater than a preset level, the embodiment of the present disclosure may not perform the operation of acquiring the rotational speed data to reduce the loss of the vehicle.

[0040] When the transmission shaft has reverse torque and the fault level is less than the preset level, the speed data is acquired, and based on the speed data, it is determined whether the transmission system is abnormal, which can not only protect the vehicle from driving safely to prevent the transmission shaft system from breaking, but also directly output fault prompt information when the fault level is greater than the preset level, so that the user can quickly know the fault and repair the fault in time, and also avoid unnecessary transmission system monitoring operations. Exemplarily, the preset level can be level 3.

[0041] It should be noted that the fault level in the embodiment of the present disclosure may be the fault level of the vehicle, that is, the fault level may be the overall fault level obtained when the vehicle fails. Optionally, the fault level may also be the fault level of the transmission system, which may be determined based on the sound signal on the transmission shaft during the vehicle starting or driving.

[0042] Specifically, if the speed shifting operation is triggered when the vehicle is starting or driving, it can be detected whether there is an impact sound on the drive shaft. If an impact sound is detected on the drive shaft during both starting and driving, it is determined that the vehicle has a fault and the fault level is high at this time.

[0043] Optionally, if no abnormal noise is detected when the vehicle starts, but an impact sound is detected on the transmission shaft during driving, it is also determined that the vehicle has a fault, and the fault level at this time may be lower than the fault level in the previous case.

[0044] It should be noted that, in the process of determining that a transmission system fault occurs, the embodiment of the present disclosure can obtain the sound level of the sound signal, and on this basis, obtain the fault level according to the sound level. Here, the sound level and the fault level can be in direct proportion, that is, the higher the sound level, the higher the fault level.

[0045] As another optional method, when the vehicle is detected to be in a driving state, the embodiment of the present disclosure can obtain the driving speed of the vehicle, and on this basis, determine whether the driving speed of the vehicle at this time exceeds the preset speed. If it is determined that the driving speed of the vehicle exceeds the preset speed, when detecting whether the transmission shaft has a reverse torque, if the transmission shaft has a reverse torque, the speed data of the transmission shaft within a preset time period is obtained.

[0046] After determining that the driving speed exceeds the preset speed, by detecting whether the transmission shaft has reverse torque, not only can the vehicle energy loss be reduced, but also the acquired speed data can be made more accurate.

[0047] In this process, the disclosed embodiment can also obtain the gear position of the vehicle and determine whether the gear position of the vehicle is a designated gear position, and if the gear position of the vehicle is a designated gear position, determine whether the driving speed of the vehicle exceeds a preset speed. The vehicle can be in a driving state in the designated gear position.

[0048] For example, when it is detected that the vehicle is driving in D gear, the embodiment of the present disclosure can determine whether the vehicle speed is greater than 20 km / h. If it is determined that the vehicle speed is greater than 20 km / h, the embodiment of the present disclosure can obtain the speed data of the transmission shaft within a preset time period when it is determined that the vehicle has reverse torque.

[0049] It should be noted that before determining whether the vehicle is in a driving state, the embodiment of the present disclosure may also first determine whether the vehicle is in a high-pressure state. If it is determined that the vehicle is in a high-pressure state, the gear position of the vehicle is obtained, and it is determined whether the gear position is a designated gear position. In other words, when high pressure is detected on the vehicle, the embodiment of the present disclosure may perform a gear position determination operation.

[0050] In summary, the embodiment of the present disclosure can comprehensively determine whether to obtain the rotation speed data of the transmission shaft within a preset time period based on at least one of the reverse torque, the fault level of the vehicle, and the driving speed. In this process, the reverse torque can be the basis for the judgment.

[0051] As a specific factual manner, when it is determined that the vehicle is in a driving state, the driving speed of the vehicle is obtained. If the driving speed is greater than a preset speed, it is detected whether the vehicle has reverse torque. If it is determined that the vehicle has reverse torque, the fault level of the vehicle is obtained, and it is determined whether the fault level is less than a preset level. If it is determined that the fault level is less than the preset level, the speed data of the transmission shaft within a preset time period is obtained.

[0052] In some embodiments, after the rotation speed data of the transmission shaft is obtained, the embodiment of the present disclosure can obtain the rotation angle data of the transmission shaft based on the rotation speed data. Specifically, there can be a corresponding relationship between the rotation speed data and the rotation angle data. After the rotation speed data is obtained, the rotation angle data corresponding to the rotation speed data can be obtained by looking up a table. Among them, the corresponding relationship between the rotation speed data and the rotation angle data can be obtained through multiple tests before the vehicle leaves the factory. Optionally, the rotation angle data of the transmission shaft can also be determined based on the rotation speed data and the duration of a preset time period.

[0053] In step S220, if it is determined that the rotation angle data meets the preset condition, the fault count value is updated.

[0054] As an optional method, after obtaining the rotation angle data of the transmission shaft, the embodiment of the present disclosure can also determine whether the rotation angle data meets the preset conditions, and 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 represent the number of rotation angle data that exceeds the preset conditions.

[0055] When the embodiment of the disclosure detects that the vehicle is in a driving state, the transmission system of the vehicle can be monitored in real time, and when the vehicle is detected to be braked once, the embodiment of the disclosure can obtain speed data once. During the vehicle braking process, the torque of the vehicle can change from a positive value to a negative value. In other words, as long as it is detected that the torque of the vehicle changes from a positive value to a negative value, the vehicle can obtain a speed data, that is, perform a fault count value update operation.

[0056] As an example, when the vehicle brakes for the first time, it is determined that the angle data meets the preset conditions, and the fault count value can be updated to 1; when the vehicle brakes for the second time, it is determined that the angle data meets the preset conditions, and the fault count value can be updated to 2, and so on.

[0057] It should be noted that when it is determined that the rotation angle data meets the preset condition, the embodiment of the present disclosure adds 1 to the fault count value. Conversely, when it is determined that the rotation angle data does not meet the preset condition, the embodiment of the present disclosure can reduce the fault count value by 1. When the fault count value is updated to zero, it indicates that the fault has been resolved, and the abnormal monitoring of this cycle is terminated, so that the resolution of the fault can be quickly known. Among them, the preset condition can be that the rotation angle data exceeds the preset threshold, that is, it is determined that the rotation angle value of the transmission shaft exceeds the preset threshold, which indicates that the rotation angle data meets the preset condition.

[0058] As an example, the number of times the angle data meets the preset condition is determined by recording is 6, and the corresponding fault count value is 6. By comparison, it is determined that the fault count value 6 is greater than the abnormal threshold value 5, and the vehicle's driving torque can be reduced. In this process, if it is detected that the angle data does not meet the preset condition, the fault count value can be reduced by 1. If the fault count value is updated to 0, it means that the abnormality of the transmission system has been resolved in a timely manner.

[0059] As another optional method, when it is determined that the turning angle data meets the preset conditions, the embodiment of the present disclosure can update the abnormal count value, and when the abnormal count value exceeds the first preset threshold, reduce the driving torque of the vehicle. Afterwards, the embodiment of the present disclosure can also continue to monitor the turning angle data, and when it is determined that the turning angle data obtained in real time does not meet the preset conditions, update the normal count value.

[0060] Here, if it is determined that the updated normal count value exceeds the second preset threshold, the abnormal count value can be cleared. The abnormal count value is cleared to zero, indicating 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 of the transmission system has been resolved. In other words, by monitoring whether the abnormal count value is cleared to zero, it is possible to quickly know whether the transmission system has resumed normal operation.

[0061] It should be noted that in the process of clearing the abnormal count value, the embodiment of the present disclosure may also clear the normal count value. Optionally, after determining that the abnormal count value exceeds the first preset threshold and reducing the driving torque of the vehicle, the embodiment of the present disclosure may also clear the normal count value.

[0062] In step S230 , it is determined that the updated fault count value exceeds an abnormal threshold value, and the driving torque of the vehicle is reduced.

[0063] As an optional method, after executing the fault count value update operation, the embodiment of the present disclosure can determine whether the updated fault count value exceeds the abnormal threshold. If it is determined that the updated fault count value exceeds the abnormal threshold, the embodiment of the present disclosure can reduce the driving torque of the vehicle.

[0064] Here, the updated fault count value may be a value after the fault count value increases. If the fault count value decreases, the embodiment of the present disclosure may not perform the fault count value judgment operation, that is, it is not necessary to determine whether the updated fault count value exceeds the abnormal threshold.

[0065] In addition, when it is determined that the updated fault count value exceeds the abnormal threshold, the embodiment of the present disclosure can reduce the vehicle's driving torque, and on this basis, output a fault reminder through the instrument panel, that is, the instrument reports a fault.

[0066] In summary, when it is detected that the vehicle's drive shaft angle exceeds the normal state, the embodiment of the present disclosure can alarm through the instrument fault light, and when it is determined that the drive shaft is in an abnormal state, by reducing the vehicle's driving torque, it can not only protect the vehicle's driving safety, but also prevent the drive shaft system from breaking.

[0067] It should be noted that when it is determined that the updated fault count value exceeds the abnormal threshold, the embodiment of the present disclosure may also obtain vibration data on the transmission shaft and determine whether the vibration data exceeds the vibration threshold. If it is determined that the vibration data exceeds the vibration threshold, the embodiment of the present disclosure may obtain the wear amount of the transmission shaft. If the wear amount of the transmission shaft exceeds the standard and the load of the vehicle does not exceed the preset load, the driving torque of the vehicle may be reduced. The preset load may match the model of the vehicle.

[0068] The disclosed embodiment can accurately and effectively monitor transmission system faults based on angle data. Specifically, the rotation speed data of the transmission shaft within a preset time period is obtained, and the rotation angle data of the transmission shaft is obtained based on the rotation speed data. If it is determined that the rotation 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, which can ensure vehicle safety to a certain extent.

[0069] Figure 3 FIG. 1 is a flow chart of another method for monitoring a transmission system of a vehicle according to an exemplary embodiment. Figure 3 , the vehicle transmission system monitoring method may include the following steps: In step S310, the torque zero-crossing window of the vehicle is obtained.

[0070] In the disclosed embodiment, the torque zero-crossing window may be a time or angle range that passes through zero when the torque changes from a positive value to a negative value (or from a negative value to a positive value). Based on the torque zero-crossing window, the signal can be judged more accurately.

[0071] In some embodiments, when the transmission shaft is abnormal, the abnormality is usually more obvious when it crosses zero, that is, the change of the rotation angle data of the transmission shaft is more obvious within the zero-crossing window time. In other words, determining the change at the intersection of positive torque and negative torque can more accurately obtain the rotation angle data of the transmission shaft.

[0072] Here, the torque zero-crossing window of the vehicle can be pre-set, such as the torque zero-crossing window can be 30Nm to -30Nm. Optionally, the torque zero-crossing window can also be determined according to the use time of the vehicle. For example, the shorter the use time of the vehicle, the smaller the corresponding zero-crossing window; the longer the use time of the vehicle, the larger the corresponding zero-crossing window. In other words, the torque zero-crossing window can be adjusted in real time. For example, if a vehicle is in different states, its corresponding torque zero-crossing window may also be different. For example, if the load of the vehicle is different, the corresponding torque zero-crossing window is also different. The larger the load, the larger the corresponding torque zero-crossing window, and vice versa.

[0073] In the disclosed embodiment, the vehicle's torque zero-crossing window may correspond to a first transmission shaft speed and a second transmission speed, wherein the first transmission shaft speed may be greater than the second transmission shaft speed, the time point corresponding to the first transmission shaft speed may be the start time of a preset time period, and the time point corresponding to the second transmission shaft speed may be the end time of the preset time period.

[0074] Exemplarily, the first transmission shaft speed may be the maximum transmission shaft speed, and the second transmission shaft speed may be the minimum transmission shaft speed. Continuing with the above example, the first transmission shaft speed may be the speed of the transmission shaft when the torque is 30 Nm, and the second transmission shaft speed may be the speed of the transmission shaft when the torque is -30 Nm.

[0075] In summary, the disclosed embodiment can monitor the torque zero-crossing window, that is, monitor whether the vehicle passes through the zero-crossing torque control window. In this process, if it is monitored that the vehicle passes through zero through positive and negative torque, the zero-crossing window is controlled to be enabled, and the speed data of the transmission shaft is obtained in this state.

[0076] In step S320, a speed fluctuation mean is determined according to the first transmission shaft speed and the second transmission shaft speed corresponding to the torque zero-crossing window, and the speed fluctuation mean is used as the speed data.

[0077] From the above introduction, it can be known that the torque zero-crossing window may correspond to the first transmission shaft speed and the second transmission shaft speed. The embodiment of the present disclosure may determine the speed fluctuation mean value according to the first transmission shaft speed and the second transmission shaft speed.

[0078] Exemplarily, the speed fluctuation mean value can be determined based on the maximum and minimum transmission shaft speeds in the zero-crossing window, that is, the speed fluctuation mean value can be the average of the first transmission shaft speed and the second transmission shaft speed, and the average value can be used as the speed data.

[0079] In step S330, the rotation angle value of the transmission shaft is determined according to the speed fluctuation mean value and the time of the torque zero-crossing window.

[0080] In the disclosed embodiment, the transmission shaft angle data can be determined based on the speed fluctuation mean and the time of the torque zero-crossing window. Specifically, the disclosed embodiment can determine the transmission shaft angle value based on the speed fluctuation mean and the time of the torque zero-crossing window, wherein the time of the torque filter window can be the duration corresponding to the preset time period.

[0081] Exemplarily, the time at the first transmission shaft speed corresponding to the torque zero-crossing window is T1, and the time at the second transmission shaft speed is T2, and the time at the torque zero-crossing window is T2-T1.

[0082] In some implementations, the following formula may be satisfied among the speed fluctuation mean, the torque filter window time, and the transmission shaft angle value: Speed ​​fluctuation mean (n) = transmission shaft angle (α) / torque filter window time (t) * 2π; Based on the above formula, the rotation angle data of the transmission shaft can be obtained according to the speed fluctuation mean and the time of the torque filter window. Here, the rotation angle data can be the transmission shaft rotation angle change rate.

[0083] In step S340, if it is determined that the rotation angle data meets the preset condition, the fault count value is updated.

[0084] In step S350 , it is determined that the updated fault count value exceeds an abnormal threshold value, and the driving torque of the vehicle is reduced.

[0085] The specific implementation of step S340 to step S350 has been described in detail in the above embodiment, and will not be repeated here.

[0086] In order to better illustrate the monitoring process of the transmission system, the present disclosure embodiment provides the following Figure 4 The example diagram shown is based on Figure 4 It is known that when high pressure is detected on the 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 20km / h; whether the braking time of the vehicle is greater than 5s; whether energy recovery is enabled; and whether the fault level is less than 3.

[0087] As an example, when it is determined that the transmission shaft has a reverse torque, the embodiment of the present 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 transmission shaft within a preset time period.

[0088] As another example, when it is determined that the transmission shaft has reverse torque, if a vehicle fault is detected, the embodiment of the present disclosure can determine whether the fault level is less than level 3, and if it is less than level 3, obtain the speed data of the transmission shaft within a preset time period.

[0089] As another example, when it is detected that the vehicle is in a driving state and the driving speed exceeds 20 km / h, if it is determined that the transmission shaft has reverse torque, the rotation speed data of the transmission shaft within a preset time period can be obtained.

[0090] If at least one of the above conditions is met, the embodiment of the present disclosure can monitor the torque zero-crossing window, that is, determine the torque zero-crossing window, and on this basis, obtain the maximum transmission shaft speed and the minimum transmission shaft speed corresponding to the zero-crossing window, and calculate the speed fluctuation mean value based on the maximum and minimum transmission shaft speeds. The transmission shaft rotation angle value can be determined based on the speed fluctuation mean value and the window time.

[0091] In addition, if the above conditions are not met, the end operation can be performed, and the speed data acquisition operation does not need to be performed. For example, when it is determined that the vehicle speed is greater than 20 km / h, the end is performed.

[0092] After obtaining the rotation angle value, the embodiment of the present disclosure can determine whether the transmission shaft rotation angle value exceeds the preset threshold value. If it is determined that the transmission shaft rotation angle exceeds the preset threshold value, the embodiment of the present disclosure can add 1 to the fault count value. Conversely, if it is determined that the transmission shaft rotation angle does not exceed the preset threshold value, the embodiment of the present disclosure can reduce 1 to the fault count value.

[0093] In addition, after the fault count value is increased by 1, the embodiment of the present disclosure can determine whether the fault count value is greater than 5. If it is determined that the fault count value is greater than 5, it is determined that the transmission system has a fault. At this time, the speed limit and torque reduction operation can be performed, and the instrument can report the fault. In addition, the vehicle's fault light can be turned on at this time. Optionally, if it is determined that the fault count value is less than 5, it ends. At this time, the embodiment of the present disclosure can save the updated fault count value for the convenience of the next monitoring.

[0094] By monitoring the rotation angle data of the transmission shaft, the disclosed embodiment can diagnose the signs of impending hardware damage and remind the driver to repair the vehicle in time. In addition, the controller system can limit the speed of the vehicle at high speeds to prevent the transmission system from breaking during driving and avoid accidents caused by it.

[0095] That is to say, the disclosed embodiment can identify the abnormal state of the transmission shaft through the vehicle fault diagnosis electronic control unit, and trigger the vehicle instrument prompt when the abnormal state occurs. In addition, the disclosed embodiment can reduce the transmission torque, protect the driving safety of the vehicle, prevent the safety accident caused by the breakage of the transmission shaft during driving, and ensure the safety of personnel and vehicles.

[0096] In the disclosed embodiment, the vehicle system controller can monitor the abnormal state of the transmission shaft angle. When the monitoring finds that the transmission shaft angle is abnormal, it can report a fault and reduce the vehicle driving torque to remind the driver and prevent the transmission shaft from further deteriorating when driving at high torque. The control logic can monitor the abnormal fault of the transmission shaft angle, and can alarm to remind the driver to repair and check as soon as possible. In addition, the disclosed embodiment can protect the vehicle transmission shaft from breaking at high torque, reduce the vehicle driving torque, and prevent accidents during driving.

[0097] Figure 5 is a block diagram of a vehicle transmission system monitoring device according to an exemplary embodiment, wherein the transmission system may include a transmission 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 .

[0098] The acquisition module 510 is configured to acquire the rotation speed data of the transmission shaft within a preset time period, and acquire the rotation angle data of the transmission shaft based on the rotation speed data; The updating module 520 is configured to update the fault count value if it is determined that the turning angle data meets a preset condition; The processing module 530 is configured to determine that the updated fault count value exceeds an abnormal threshold, and reduce the driving torque of the vehicle.

[0099] In some embodiments, the vehicle transmission system monitoring device 500 may further include: A window acquisition module is configured to acquire a torque zero-crossing window of the vehicle, wherein the torque zero-crossing window corresponds to a first transmission shaft speed and a second transmission shaft speed, wherein the first transmission shaft speed is greater than the second transmission shaft speed, and the time point corresponding to the first transmission shaft speed is the start time of the preset time period, and the time point corresponding to the second transmission shaft speed is the end time of the preset time period.

[0100] In some implementations, the acquisition module 510 may be configured to determine a speed fluctuation mean value according to the first transmission shaft speed and the second transmission shaft speed corresponding to the torque zero-crossing window, and use the speed fluctuation mean value as the speed data.

[0101] In some implementations, the acquisition module 510 may also be configured to determine the rotation angle value of the transmission shaft according to the rotation speed fluctuation mean value and the time of the torque zero-crossing window.

[0102] In some implementations, the acquisition module 510 may also be configured to determine that the transmission shaft has a reverse torque, and acquire rotation speed data of the transmission shaft within a preset time period.

[0103] In some implementations, the acquisition module 510 may include: a level acquisition submodule, configured to acquire a fault level of the vehicle when it is determined that the transmission shaft has the reverse torque and the vehicle fails; The speed acquisition submodule is configured to determine that the fault level is less than a preset level and acquire the speed data of the transmission shaft within a preset time period.

[0104] In some embodiments, the acquisition module 510 can also be configured to acquire the driving speed of the vehicle when the vehicle is in a driving state; when it is determined that the driving speed exceeds a preset speed and the transmission shaft has the reverse torque, acquire the rotational speed data of the transmission shaft within a preset time period.

[0105] The disclosed embodiment can accurately and effectively monitor transmission system faults based on angle data. Specifically, the rotation speed data of the transmission shaft within a preset time period is obtained, and the rotation angle data of the transmission shaft is obtained based on the rotation speed data. If it is determined that the rotation 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, which can ensure vehicle safety to a certain extent.

[0106] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0107] Figure 6 6 is a block diagram of a vehicle 600 according to an exemplary embodiment. For example, the vehicle 600 may be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. The vehicle 600 may be an autonomous vehicle or a semi-autonomous vehicle.

[0108] Reference Figure 6 , the vehicle 600 may include various subsystems, for example, 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. In addition, each subsystem and each component of the vehicle 600 may be interconnected by wire or wireless means.

[0109] In some embodiments, the infotainment system 610 may include a communication system, an entertainment system, and a navigation system, etc.

[0110] The perception system 620 may include several sensors for sensing information about the environment around the vehicle 600. For example, the perception system 620 may include a global positioning system (the global positioning system may be a GPS system, or a Beidou system or other positioning systems), an inertial measurement unit (IMU), a laser radar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0111] The decision control system 630 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0112] The drive system 640 may include components that provide powered motion for 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 an internal combustion engine, an electric motor, and an air compression engine. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0113] Some or all functions of the vehicle 600 are controlled by a computing platform 650. The computing platform 650 may include at least one processor 651 and a memory 652, and the processor 651 may execute instructions 653 stored in the memory 652.

[0114] The processor 651 may be any conventional processor, such as a commercially available CPU. The processor may also include a graphics processor (Graphic Process Unit, GPU), a field programmable gate array (Field Programmable Gate Array, FPGA), a system on chip (System on Chip, SOC), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC) or a combination thereof.

[0115] The memory 652 may be implemented by any type of volatile or nonvolatile memory 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 memory, flash memory, magnetic disk or optical disk.

[0116] In addition to the instructions 653 , the memory 652 may also store data, such as road maps, route information, and data such as the location, direction, and speed of the vehicle. The data stored in the memory 652 may be used by the computing platform 650 .

[0117] In the embodiment of the present disclosure, the processor 651 may execute instruction 653 to complete all or part of the steps of the above-mentioned vehicle transmission system monitoring method.

[0118] In another exemplary embodiment, a computer-readable storage medium including program instructions is also provided, and when the computer program instructions are executed by a processor, the steps of the vehicle transmission system monitoring method described above are implemented. For example, the computer-readable storage medium may be the memory 652 including the program instructions, and the program instructions may be executed by the processor 651 of the vehicle 600 to complete the vehicle transmission system monitoring method described above.

[0119] In another exemplary embodiment, a computer program product is further provided. The computer program product includes a computer program executable by a processor. When the computer program is executed by the processor, the steps of the above-mentioned vehicle transmission system monitoring method are implemented.

[0120] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0121] 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, the present disclosure will not further describe various possible combinations.

[0122] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A vehicle transmission system monitoring method, characterized in that: The transmission system includes a transmission shaft, and the method includes: Acquiring speed data of the transmission shaft within a preset time period, and acquiring rotation angle data of the transmission shaft based on the speed data; If it is determined that the rotation angle data meets the preset condition, updating the fault count value; It is determined that the updated fault count value exceeds an abnormal threshold, and the driving torque of the vehicle is reduced.

2. The method according to claim 1, characterized in that The method comprises: A torque zero-crossing window of the vehicle is obtained, wherein the torque zero-crossing window corresponds to a first transmission shaft speed and a second transmission shaft speed, wherein the first transmission shaft speed is greater than the second transmission shaft speed, and the time point corresponding to the first transmission shaft speed is the start time of the preset time period, and the time point corresponding to the second transmission shaft speed is the end time of the preset time period.

3. The method according to claim 2, characterized in that The obtaining of the rotation speed data of the transmission shaft within a preset time period includes: A speed fluctuation mean is determined according to the first transmission shaft speed and the second transmission shaft speed corresponding to the torque zero-crossing window, and the speed fluctuation mean is used as the speed data.

4. The method according to claim 3, characterized in that The acquiring the rotation angle data of the transmission shaft based on the rotation speed data comprises: The rotation angle value of the transmission shaft is determined according to the rotation speed fluctuation mean value and the time of the torque zero-crossing window.

5. The method according to claim 1, characterized in that The step of obtaining the rotation speed data of the transmission shaft within a preset time period further includes: It is determined that the transmission shaft has a reverse torque, and the rotation speed data of the transmission shaft within a preset time period is obtained.

6. The method according to claim 5, characterized in that The step of determining that the transmission shaft has reverse torque and obtaining the rotation speed data of the transmission shaft within a preset time period includes: When it is determined that the transmission shaft has the reverse torque and the vehicle fails, obtaining a failure level of the vehicle; It is determined that the fault level is less than a preset level, and the rotation speed data of the transmission shaft within a preset time period is obtained.

7. The method according to claim 5, characterized in that The determining that the transmission shaft has reverse torque and acquiring the rotation speed data of the transmission shaft within a preset time period also includes: When the vehicle is in a driving state, obtaining a driving speed of the vehicle; When it is determined that the driving speed exceeds the preset speed and the transmission shaft has the reverse torque, the rotation speed data of the transmission shaft within a preset time period is acquired.

8. A vehicle transmission system monitoring device, characterized in that: The transmission system comprises a transmission shaft, and the device comprises: an acquisition module, configured to acquire rotation speed data of the transmission shaft within a preset time period, and acquire rotation angle data of the transmission shaft based on the rotation speed data; An updating module, configured to update the fault count value if it is determined that the turning angle data satisfies a preset condition; The processing module is configured to determine that the updated fault count value exceeds an abnormal threshold and reduce the driving torque of the vehicle.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 7 are implemented.

10. A vehicle, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 7.

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