Control method, system, device and equipment for preventing out-of-gear of electric drive axle and storage medium

Abstract

The invention provides an electric drive axle out-of-gear prevention control method, system, device and equipment and a storage medium, and relates to the technical field of vehicle drive system control. The method comprises the steps that the first stroke position of a shifting fork in the electric drive axle is obtained, and whether the shifting fork has the out-of-gear tendency or not is judged based on the first stroke position; if the shifting fork has the out-of-gear tendency, the torque limiting function of the motor corresponding to the shifting fork is activated, and the torque limiting function is used for reducing the torque of the motor corresponding to the shifting fork so that the stroke position of the shifting fork can be updated to the second stroke position without the out-of-gear tendency. By monitoring the stroke position of the shifting fork in real time, the potential out-of-gear tendency can be rapidly recognized, intervention is conducted before the out-of-gear fault occurs, the active adjusting mechanism ensures that the shifting fork can rapidly recover to the safe working state, and therefore the reliability of preventing the out-of-gear fault of the gearbox is improved, and the service life of the gearbox is prolonged. Power interruption and potential safety hazards caused by out-of-gear are reduced, and the safety of vehicle driving is remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle drive system control, and in particular to a control method, system, device, equipment and storage medium for preventing an electric drive axle from disengaging. Background Art

[0002] As one of the common faults of the whole vehicle, the gearbox shift fork automatically returns to the neutral position during driving, which is more common in high-speed gears. This fault is mainly caused by the wear of the gearbox locking mechanism, the softening or breaking of the gear spring locking force, the disengagement or damage of the self-locking steel ball, etc., which causes the vehicle to lose power instantly, posing a serious driving safety hazard to users. Therefore, how to effectively prevent the gearbox from shifting out of gear has always been a technical problem that needs to be solved urgently.

[0003] In the related art, the gearbox shifting failure is usually prevented by optimizing the design of components such as the locking mechanism, the shift fork and the sliding sleeve, but there is a problem of poor reliability in preventing the gearbox shifting failure. Summary of the invention

[0004] The present application provides a control method, system, device, equipment and storage medium for preventing an electric drive axle from disengaging, so as to improve the reliability of preventing a gearbox from disengaging.

[0005] In a first aspect, the present application provides a control method for preventing an electric drive axle from disengaging, comprising:

[0006] Obtaining the first stroke position of the fork in the electric drive axle;

[0007] Based on the first stroke position, determining whether the fork has a tendency to disengage;

[0008] If the shift fork has a tendency to disengage, the torque limiting function of the motor corresponding to the shift fork is activated. The torque limiting function is used to reduce the torque of the motor corresponding to the shift fork to update the stroke position of the shift fork to a second stroke position without a tendency to disengage.

[0009] In a possible implementation, the control method for preventing the electric drive axle from shifting out of gear further includes: when the stroke position of the shift fork is updated to the second stroke position, disabling the torque limiting function of the motor.

[0010] In a possible implementation, the electric drive axle includes a first electric drive axle and a second electric drive axle, and the control method for preventing the electric drive axle from disengaging also includes: when torque limitation is performed on the motor in the first electric drive axle, torque compensation is performed on the motor in the second electric drive axle, wherein the torque value for torque compensation is equal to the torque value for torque limitation.

[0011] In a possible implementation, the control method for preventing the electric drive bridge from slipping out of gear further includes: when disabling the torque limit function of the motor in the first electric drive bridge, stopping the torque compensation for the motor in the second electric drive bridge.

[0012] In a possible implementation, based on the first stroke position, determining whether the shift fork has a tendency to slip out of gear includes: if the first stroke position is less than the shift-out threshold, determining that the shift fork has a tendency to slip out of gear; if the first stroke position is greater than or equal to the shift-out threshold, determining that the shift fork has no tendency to slip out of gear.

[0013] In a second aspect, the present application provides a control system for preventing an electric drive bridge from slipping out of gear, including:

[0014] A position acquisition component for monitoring the stroke position of the shift fork in the electric drive bridge;

[0015] A transmission controller, connected to the position acquisition component, for executing the control method for the electronic anti-shift-out of the electric drive bridge described in any one of the first aspects.

[0016] In a possible implementation, the position acquisition component includes a shift fork sensor, and the shift fork sensor is arranged on the shift actuator in the electric drive bridge.

[0017] In a third aspect, the present application provides a control device for preventing an electric drive bridge from slipping out of gear, including:

[0018] A shift fork position monitoring module for obtaining the first stroke position of the shift fork in the electric drive bridge;

[0019] A judgment module for judging whether the shift fork has a tendency to slip out of gear based on the first stroke position;

[0020] A torque control module for activating the torque limit function of the motor corresponding to the shift fork when the shift fork has a tendency to slip out of gear, and the torque limit function is used to reduce the torque of the motor corresponding to the shift fork so as to update the stroke position of the shift fork to a second stroke position without the tendency to slip out of gear.

[0021] In a fourth aspect, the present application provides an electronic device, including: a processor and a memory communicatively connected to the processor;

[0022] The memory is used for storing computer execution instructions;

[0023] The processor is used for executing the computer execution instructions stored in the memory to implement the method described in any one of the first aspects.

[0024] In a fifth aspect, the present application provides a computer-readable storage medium, in which computer execution instructions are stored, and when the computer execution instructions are executed, they are used to implement the method described in any one of the first aspects.

[0025] In a sixth aspect, the present application provides a computer program product, including a computer program which, when executed, implements the method according to any one of the first aspect.

[0026] The control method, system, device, equipment and storage medium for preventing gear disengagement of an electric drive axle provided by the present application obtain the first stroke position of a shift fork in the electric drive axle, and based on the first stroke position, determine whether the shift fork has a tendency of gear disengagement; if the shift fork has a tendency of gear disengagement, the torque limit function of the motor corresponding to the shift fork is activated, and the torque limit function is used to reduce the torque of the motor corresponding to the shift fork so as to update the stroke position of the shift fork to a second stroke position without the tendency of gear disengagement. During this process, by real-time monitoring the stroke position of the shift fork, potential gear disengagement tendencies can be quickly identified and intervened before gear disengagement faults occur. This active adjustment mechanism ensures that the shift fork can quickly return to a safe working state, thereby improving the reliability of preventing gearbox gear disengagement faults, reducing power interruption caused by gear disengagement and potential safety hazards, and significantly enhancing the safety of vehicle driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments consistent with the present application, and are used together with the specification to explain the principles of the present application.

[0028] Figure 1 It is a schematic flow chart of the control method for preventing gear disengagement of an electric drive axle provided by an exemplary embodiment of the present application;

[0029] Figure 2 It is a schematic diagram of measuring the stroke position of a shift fork in an electric drive axle provided by an exemplary embodiment of the present application;

[0030] Figure 3 It is a schematic diagram of the relationship between the stroke position of a shift fork and gear engagement and shifting in an electric drive axle provided by an exemplary embodiment of the present application;

[0031] Figure 4 It is a schematic diagram of the relationship between the stroke position of a shift fork and the motor torque provided by an exemplary embodiment of the present application;

[0032] Figure 5 It is a schematic diagram of the structure of a dual-bridge multi-gear electric drive axle provided by an exemplary embodiment of the present application;

[0033] Figure 6 It is a schematic diagram of dual-bridge torque compensation provided by an exemplary embodiment of the present application;

[0034] Figure 7 It is another schematic flow chart of the control method for preventing gear disengagement of an electric drive axle provided by an exemplary embodiment of the present application;

[0035] Figure 8A schematic structural diagram of a control system for preventing gear disengagement of an electric drive bridge provided by an exemplary embodiment of the present application;

[0036] Figure 9 A schematic position diagram of a shift fork sensor provided by an exemplary embodiment of the present application;

[0037] Figure 10 A schematic structural diagram of a control device for preventing gear disengagement of an electric drive bridge provided by an exemplary embodiment of the present application;

[0038] Figure 11 A schematic structural diagram of an electronic device provided by an exemplary embodiment of the present application.

[0039] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and more detailed descriptions will be provided hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0040] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0041] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, system, product, or device that includes a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, products, or devices.

[0042] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, displayed data, etc.) involved in the present application are all information and data authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant laws, regulations, and standards, and corresponding operation entrances are provided for the user to select authorization or rejection.

[0043] In the related art, as the vehicle mileage increases, the wear of components intensifies, making it difficult to effectively prevent the problem of the transmission from slipping out of gear. Therefore, there is a problem of poor reliability in preventing the transmission from slipping out of gear only by optimizing the design of components such as the locking mechanism, the shift fork, and the sliding sleeve. In addition, with the wide application of electric drive axles, the electric drive axle integrates multiple components such as a transmission, a shifting mechanism, an electric motor, and a lubricating oil pump. This high degree of integration poses higher requirements for the design and technology of components.

[0044] To solve the above problems, the embodiments of the present application provide a control solution for preventing the electric drive axle from slipping out of gear. By adopting an electronic control method, the stroke position of the shift fork is monitored in real time, and based on the stroke position, it is judged whether there is a potential tendency to slip out of gear, and intervention is carried out before the slipping-out-of-gear fault occurs. This active adjustment mechanism ensures that the shift fork can quickly return to a safe working state, thereby improving the reliability of preventing the transmission from slipping out of gear. Implementing anti-slipping-out-of-gear through an electronic control method has higher accuracy, efficiency, and reliability compared with traditional hardware optimization methods, and can effectively reduce the design and technology requirements for components such as the locking mechanism, the shift fork, and the sliding sleeve, which helps to make up for the deficiencies in hardware design and technology.

[0045] The following will specifically describe the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems through specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below with reference to the drawings.

[0046] Figure 1 It is a schematic flowchart of a control method for preventing the electric drive axle from slipping out of gear provided by an exemplary embodiment of the present application. As Figure 1 shown, the control method for preventing the electric drive axle from slipping out of gear includes the following steps:

[0047] S101. Obtain the first stroke position of the shift fork in the electric drive axle.

[0048] Exemplarily, Figure 2 It is a schematic diagram for measuring the stroke position of the shift fork in the electric drive axle provided by an exemplary embodiment of the present application. As Figure 2 shown in (a) therein, in the neutral state, the sliding sleeve is not engaged with the engaging teeth, and the sliding sleeve rotates with the shaft without transmitting torque; as Figure 2 shown in (b) therein, in the in-gear state, the sliding sleeve is completely engaged with the engaging teeth, and the sliding sleeve rotates with the shaft to transmit all torque. The gear-shifting process is the process in which the shift fork drives the sliding sleeve to move together and engage with the engaging teeth when in neutral. Correspondingly, Figure 2 the moving distance of the sliding sleeve therein is the stroke position of the shift fork.

[0049] Exemplarily, a position acquisition component is provided in the electric drive axle. The position acquisition component is used to collect the stroke position of the shift fork in the electric drive axle in real time and send the collected data to the transmission control unit (TCU) in the electric drive axle at a set time interval. Correspondingly, the transmission control unit obtains the first stroke position of the shift fork in the electric drive axle based on the received collected data.

[0050] Among them, the set time interval is, for example, 20 milliseconds, 50 milliseconds, or 100 milliseconds, etc., and no limitation is made here.

[0051] S102. Based on the first stroke position, determine whether the shift fork has a tendency to shift out of gear.

[0052] Among them, the tendency to shift out of gear refers to the tendency that the shift fork may slide out of the current gear, causing the transmission to enter the neutral state.

[0053] Exemplarily, after obtaining the first stroke position of the shift fork, through a preset algorithm, based on the stroke position range of the shift fork in the normal working state and its expected stroke position in different gears, determine whether the shift fork has a tendency to shift out of gear.

[0054] S103. If the shift fork has a tendency to shift out of gear, activate the torque limit function of the motor corresponding to the shift fork. The torque limit function is used to reduce the torque of the motor corresponding to the shift fork to update the stroke position of the shift fork to a second stroke position without the tendency to shift out of gear.

[0055] Exemplarily, if it is determined that the shift fork has a tendency to shift out of gear, immediately activate the torque limit function of the motor. By reducing the torque output by the motor, reduce the mechanical stress on the shift fork and make its stroke position return to the second stroke position within the safe range.

[0056] The control method for preventing gear shift out of the electric drive axle provided by the embodiments of the present application can quickly identify potential gear shift out tendencies by real-time monitoring of the stroke position of the shift fork and intervene before the gear shift out failure occurs. This active adjustment mechanism ensures that the shift fork can quickly return to a safe working state, thereby improving the reliability of preventing gear shift out failures of the transmission, reducing power interruption and potential safety hazards caused by gear shift out, and significantly enhancing the driving safety of the vehicle. In addition, through this electronic control method, the design and process requirements for components such as the locking mechanism, shift fork, and sliding sleeve are reduced, effectively making up for the deficiencies in hardware design, shortening the design cycle caused by changes in the hardware structure, and reducing costs; and, since the shift fork position can be quickly adjusted when potential gear shift out tendencies are identified, users can hardly perceive power interruption or abnormalities, which not only improves the safety and reliability of the electric drive axle but also enhances the driving experience of users.

[0057] In some embodiments, determining whether the shift fork has a tendency to come out of gear based on the first stroke position includes: if the first stroke position is less than the out-of-gear threshold, it is determined that the shift fork has a tendency to come out of gear; if the first stroke position is greater than or equal to the out-of-gear threshold, it is determined that the shift fork has no tendency to come out of gear.

[0058] Exemplarily, the stroke position of the shift fork is subdivided according to the meshing length between the sliding sleeve and the engaging teeth. Further, different gear states are confirmed according to the stroke position. For example, Figure 3 This is a schematic diagram of the relationship between the stroke position of the shift fork and gear engagement and shifting in the electric drive axle provided by an exemplary embodiment of the present application. As Figure 3 shown, when the stroke position < 3mm, it represents the N gear (i.e., neutral gear) state; when 3mm ≤ stroke position < 6mm, it represents the weak connection state; when 6mm ≤ stroke position < 7mm, it represents the strong connection state; when 7mm ≤ stroke position ≤ 11mm, it represents the fully-in-gear state.

[0059] Further, it is determined whether there is a tendency to come out of gear according to the stroke position of the shift fork. If the stroke position of the shift fork is less than the out-of-gear threshold, for example, 7mm, it is determined that the shift fork has a tendency to come out of gear; if the stroke position of the shift fork is greater than or equal to 7mm and less than or equal to, for example, 11mm, it is determined that the shift fork has no tendency to come out of gear.

[0060] It should be noted that Figure 3 the relationship between the stroke position of the shift fork and gear engagement and shifting shown, and the corresponding out-of-gear threshold are only examples, and the relationship between the stroke position of the shift fork and gear engagement and shifting, as well as the out-of-gear threshold, are not limited herein.

[0061] In the embodiments of the present application, by setting the out-of-gear threshold, the tendency to come out of gear can be accurately identified, thereby improving the accuracy and reliability of the determination; by adopting a simple threshold judgment logic, not only the computational complexity is reduced, but also the response speed of the system is improved, thereby improving the operating efficiency of the system and making it easier to implement and maintain.

[0062] In some embodiments, the method for controlling anti-out-of-gear of the electric drive axle further includes: disabling the torque limit function of the motor when the stroke position of the shift fork is updated to the second stroke position.

[0063] Exemplarily, Figure 4 This is a schematic diagram of the relationship between the stroke position of the shift fork and the motor torque provided by an exemplary embodiment of the present application. As Figure 4As shown, at time T1, when it is recognized that the stroke position of the shift fork has deviated from the fully engaged position, that is, when the stroke position of the shift fork is less than the shift-out threshold, such as 7 mm, the torque limit function of the motor corresponding to the shift fork is activated to clear the torque of the motor, so that the motor torque gradually decreases from 450 Nm to 0 Nm. During this process, the stroke position of the shift fork gradually returns to the engaged position; at time T2, when it is recognized that the shift fork has returned to the engaged position, that is, when the stroke position of the shift fork is updated to the second stroke position, such as 8.5 mm, the torque limit function of the motor is disabled, so that the motor torque gradually increases from 0 Nm to 450 Nm to achieve the recovery of the motor torque.

[0064] In the embodiment of the present application, by disabling the torque limit function of the motor when the stroke position of the shift fork is updated to the second stroke position, it is possible to effectively prevent the motor from applying too large or too small torque at inappropriate times, thereby reducing the occurrence probability of gear shifting out, not only improving the safety and reliability of the system, but also ensuring the stable operation of the electric drive axle under various operating conditions. In addition, by optimizing torque management, it helps to extend the service life of system components and reduce maintenance requirements.

[0065] Based on the above embodiments, in some embodiments, the electric drive axle includes a first electric drive axle and a second electric drive axle. The control method for preventing gear shifting out of the electric drive axle further includes: when performing torque limit on the motor in the first electric drive axle, performing torque compensation on the motor in the second electric drive axle, where the torque value for performing torque compensation is equal to the torque value for performing torque limit.

[0066] Exemplarily, Figure 5 is a schematic structural diagram of a two-bridge multi-gear electric drive axle provided by an exemplary embodiment of the present application. As Figure 5 shown, the middle bridge and the rear bridge are two independent electric drive axles that can drive independently. Correspondingly, Figure 6 is a schematic diagram of two-bridge torque compensation provided by an exemplary embodiment of the present application. As Figure 5 and Figure 6 shown, at time T3, when it is determined according to the first stroke position of the shift fork in the middle bridge that the shift fork has a tendency to shift out (for example, the first stroke position is less than 7 mm), the torque limit function of motor 1 is activated to reduce the torque of motor 1, so as to update the stroke position of the shift fork in the middle bridge to the second stroke position without the tendency to shift out, such as 8.5 mm; when performing torque limit on motor 1, torque compensation is performed on motor 2 in the rear bridge, where the torque value for performing torque compensation is equal to the torque value for performing torque limit. For example, during the process that the motor torque corresponding to motor 1 gradually decreases from 200 Nm to 0 Nm, the motor torque corresponding to motor 2 gradually increases from 200 Nm to 400 Nm.

[0067] In some embodiments, the control method for preventing the electric drive axle from slipping out of gear further includes: when disabling the torque limit function of the motor in the first electric drive axle, stopping the torque compensation for the motor in the second electric drive axle.

[0068] Exemplarily, still referring to Figure 5 and Figure 6 , at time T4, when it is recognized that the stroke position of the shift fork in the middle axle returns to the in-gear position, that is, when the stroke position of the shift fork is updated to the second stroke position, for example, 8.5 mm, disabling the torque limit function of the motor 1 in the middle axle, and at the same time stopping the torque compensation for the motor 2 in the rear axle, so that when the torque of the motor 1 gradually increases from 0 Nm to 200 Nm, the corresponding motor torque of the motor 2 gradually decreases from 400 Nm to 200 Nm, so as to realize the recovery of the motor torque of the motor 1 and the motor 2.

[0069] In the embodiments of the present application, by performing equivalent torque compensation on the motor in another electric drive axle when performing torque limit on the motor in one electric drive axle, it is possible to ensure the continuity and stability of the power output during the driving of the vehicle, so that the driver and passengers do not perceive the power interruption, significantly improving the driving comfort; in addition, through precise torque control and compensation, it is possible to reduce unnecessary energy consumption without affecting the vehicle performance, which helps to improve the overall energy efficiency of the system; and, when disabling the torque limit function, automatically stopping the torque compensation simplifies the control strategy, which is of positive significance for reducing the calculation burden and control difficulty of the system.

[0070] Figure 7 Another flowchart of the control method for preventing the electric drive axle from slipping out of gear provided by the exemplary embodiment of the present application. As Figure 7 shown, the control method for preventing the electric drive axle from slipping out of gear includes the following steps:

[0071] S701. Obtain the first stroke position of the shift fork in the electric drive axle.

[0072] S702. Based on the first stroke position, determine whether the shift fork has a tendency to slip out of gear.

[0073] Exemplarily, if the first stroke position is less than the shift-out threshold, for example, 7 mm, it is determined that the shift fork has a tendency to slip out of gear; if the first stroke position is greater than or equal to 7 mm, it is determined that the shift fork has no tendency to slip out of gear.

[0074] If so, execute S703;

[0075] If not, execute S701.

[0076] S703. Activate the torque limit function of the motor corresponding to the shift fork, and the torque limit function is used to reduce the torque of the motor corresponding to the shift fork to update the stroke position of the shift fork to the second stroke position without the tendency to slip out of gear.

[0077] S704. When the stroke position of the shift fork is updated to the second stroke position, disable the torque limit function of the motor.

[0078] In summary, the present application has at least the following advantages:

[0079] First, by real-time monitoring of the stroke position of the shift fork, potential gear disengagement tendencies can be quickly identified and intervened before a gear disengagement failure occurs. This active adjustment mechanism ensures that the shift fork can quickly return to a safe operating state, thereby improving the reliability of preventing gear disengagement failures in the transmission, reducing power interruption and potential safety hazards caused by gear disengagement, and significantly enhancing the driving safety of the vehicle. Additionally, through this electronic control method, the design and process requirements for components such as the locking mechanism, shift fork, and sliding sleeve are reduced, effectively compensating for the deficiencies in hardware design, shortening the design cycle caused by changes in the hardware structure, and reducing costs; also, since the shift fork position can be quickly adjusted when a potential gear disengagement tendency is identified, users can hardly perceive power interruption or abnormalities, which not only improves the safety and reliability of the electric drive axle but also enhances the user's driving experience.

[0080] Second, by setting a gear disengagement threshold, gear disengagement tendencies can be accurately identified, thereby improving the accuracy and reliability of judgment; by adopting a simple threshold judgment logic, not only is the computational complexity reduced, but the system response speed is also improved, thus enhancing the operating efficiency of the system and making it easier to implement and maintain.

[0081] Third, by disabling the torque limit function of the motor when the stroke position of the shift fork is updated to the second stroke position, it is possible to effectively prevent the motor from applying excessive or insufficient torque at inappropriate times, thereby reducing the probability of gear disengagement, not only improving the safety and reliability of the system but also ensuring the stable operation of the electric drive axle under various operating conditions. Additionally, by optimizing torque management, it helps to extend the service life of system components and reduce maintenance requirements.

[0082] Fourth, when torque is limited for a motor in one electric drive axle, equivalent torque compensation is performed on the motor in the other electric drive axle, which can ensure the continuity and stability of power output during vehicle driving, making the driver and passengers unaware of power interruption and significantly enhancing driving comfort; additionally, through precise torque control and compensation, unnecessary energy consumption can be reduced without affecting vehicle performance, which helps to improve the overall energy efficiency of the system; also, when the torque limit function is disabled, torque compensation is automatically stopped, simplifying the control strategy, which is of positive significance for reducing the computational burden and control difficulty of the system.

[0083] Figure 8 This is a schematic structural diagram of a control system for preventing gear disengagement of an electric drive axle provided by an exemplary embodiment of the present application. As Figure 8As shown, the control system 80 for preventing the electric drive axle from slipping out of gear includes: a position acquisition component 81 and a transmission controller 82; where:

[0084] The position acquisition component 81 is used to monitor the stroke position of the shift fork in the electric drive axle;

[0085] The transmission controller 82 is connected to the position acquisition component 81 and is used to execute the control method for electronic anti-disengagement of the electric drive axle described in any one of the above embodiments.

[0086] In some embodiments, the position acquisition component includes a shift fork sensor, and the shift fork sensor is arranged on the shift actuator in the electric drive axle.

[0087] It can be understood that the position acquisition component 81 includes but is not limited to a shift fork sensor, a Hall effect sensor, an optoelectronic sensor, an inductive sensor, a potentiometer, a magnetoresistive sensor, a laser ranging sensor, etc.

[0088] Exemplarily, Figure 9 is a schematic position diagram of the shift fork sensor provided by an exemplary embodiment of the present application. As Figure 9 shown, the shift fork sensor is arranged on the shift actuator in the electric drive axle and is used to monitor the stroke position of the shift fork in the electric drive axle in real time.

[0089] The following is an apparatus embodiment of the present application, which can be used to execute the method embodiment of the present application. For details not disclosed in the apparatus embodiment of the present application, please refer to the method embodiment of the present application.

[0090] Figure 10 is a schematic structural diagram of a control device for preventing the electric drive axle from slipping out of gear provided by an exemplary embodiment of the present application. As Figure 10 shown, the control device 100 for preventing the electric drive axle from slipping out of gear includes a shift fork position monitoring module 101, a judgment module 102, and a torque control module 103, where:

[0091] The shift fork position monitoring module 101 is used to obtain the first stroke position of the shift fork in the electric drive axle;

[0092] The judgment module 102 is used to judge whether the shift fork has a tendency to slip out of gear based on the first stroke position;

[0093] The torque control module 103 is used to activate the torque limit function of the motor corresponding to the shift fork when the shift fork has a tendency to slip out of gear, and the torque limit function is used to reduce the torque of the motor corresponding to the shift fork so as to update the stroke position of the shift fork to a second stroke position without the tendency to slip out of gear.

[0094] In a possible implementation manner, the torque control module 103 can be specifically used to: disable the torque limit function of the motor when the stroke position of the shift fork is updated to the second stroke position.

[0095] In a possible implementation, the electric drive axle includes a first electric drive axle and a second electric drive axle. The torque control module 103 can also be configured to: when torque limitation is performed on the motor in the first electric drive axle, perform torque compensation on the motor in the second electric drive axle, where the torque value for torque compensation is equal to the torque value for torque limitation.

[0096] In a possible implementation, the torque control module 103 can also be configured to: when disabling the torque limitation function of the motor in the first electric drive axle, stop the torque compensation for the motor in the second electric drive axle.

[0097] In a possible implementation, the determination module 102 can specifically be configured to: if the first stroke position is less than the shift-out threshold, determine that the shift fork has a tendency to shift out; if the first stroke position is greater than or equal to the shift-out threshold, determine that the shift fork has no tendency to shift out.

[0098] The control device for preventing shift-out of the electric drive axle provided in the embodiments of the present application can execute the technical solutions shown in the embodiments of the control method for preventing shift-out of the electric drive axle. The implementation principles and beneficial effects are similar and will not be elaborated herein.

[0099] It should be noted that for the foregoing method embodiments, for simplicity of description, they are all expressed as a series of action combinations. However, those skilled in the art should understand that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to the present application.

[0100] Furthermore, it should be noted that although the steps in the flowchart are displayed in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limitation, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowchart can include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or sub-steps or stages of other steps.

[0101] It should be noted that the above device embodiments are only illustrative, and the devices of the present application can also be implemented in other ways; moreover, it should be understood that the division of each module of the above device is only a logical function division, and in actual implementation, it can be fully or partially integrated into a physical entity, or physically separated. And these modules can all be implemented in the form of software called by processing elements; they can also all be implemented in hardware form; or some modules can be implemented in the form of software called by processing elements, and some modules can be implemented in hardware form. For example, the torque control module can be a separately established processing element, or can be integrated in a certain chip of the above device. In addition, it can also be stored in the memory of the above device in the form of program code, and the function of the above torque control module can be called and executed by a certain processing element of the above device. The implementation of other modules is similar. In addition, all or part of these modules can be integrated together or can be independently implemented. Here, the processing element can be an integrated circuit with signal processing capabilities. In the implementation process, each step of the above method or each of the above modules can be completed by the integrated logic circuit in hardware or the instructions in software form in the processor element.

[0102] For example, the above modules can be one or more integrated circuits configured to implement the above method, such as: one or more application specific integrated circuits (ASICs), or, one or more digital signal processors (DSPs), or, one or more field programmable gate arrays (FPGAs), etc. Again, when a certain module above is implemented in the form of a processing element scheduling program code, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processors that can call program code. Again, these modules can be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0103] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, the processes or functions according to the embodiments of the present application are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (such as a floppy disk, hard disk, magnetic tape), an optical medium (such as a Digital Video Disc (DVD)), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0104] Figure 11 Schematic diagram of the structure of the electronic device provided by the exemplary embodiment of the present application. As Figure 11 shown, the electronic device 110 of this embodiment includes:

[0105] At least one processor 111; and a memory 112 communicatively connected to the at least one processor;

[0106] Wherein, the memory 112 stores instructions executable by the at least one processor 111, and the instructions are executed by the at least one processor 111 to cause the electronic device to execute the method described in any of the above embodiments.

[0107] Optionally, the memory 112 can be either independent or integrated with the processor 111.

[0108] The memory 112 may include a high-speed random access memory (Random Access Memory, RAM for short), and may also include non-volatile memory, such as at least one disk memory.

[0109] The processor 111 may be a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present application. Specifically, when implementing the control method for preventing gear disengagement of the electric drive bridge described in the foregoing method embodiments, the electronic device may be, for example, an electronic device with processing functions such as a server.

[0110] Optionally, the electronic device may further include a communication interface 113. In a specific implementation, if the communication interface 113, the memory 112, and the processor 111 are implemented independently, the communication interface 113, the memory 112, and the processor 111 may be interconnected through a bus and communicate with each other. The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc., but it does not mean that there is only one bus or one type of bus.

[0111] Optionally, in a specific implementation, if the communication interface 113, the memory 112, and the processor 111 are integrated on a single chip, the communication interface 113, the memory 112, and the processor 111 may communicate through an internal interface.

[0112] For the implementation principle and technical effects of the electronic device provided in this embodiment, reference may be made to the foregoing embodiments, which will not be elaborated here.

[0113] The embodiments of the present application further provide a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed, they are used to implement the method steps in the method embodiments as described above. The specific implementation manners and technical effects are similar and will not be elaborated here.

[0114] The above-mentioned computer-readable storage medium 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 memory, flash memory, magnetic disk or optical disc. The readable storage medium can be any available medium accessible by a general-purpose or special-purpose computer.

[0115] An exemplary readable storage medium is coupled to the processor, enabling the processor to read information from and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application-specific integrated circuit. Of course, the processor and the readable storage medium can also exist as discrete components in the control device for preventing gear disengagement of the electric drive bridge.

[0116] The embodiments of the present application also provide a computer program product, including a computer program, which implements the method steps in the above-mentioned method embodiments when the computer program is executed. The specific implementation manners and technical effects are similar and will not be elaborated here.

[0117] In the above embodiments, the descriptions of the respective embodiments have their own focuses. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments. The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0118] Those skilled in the art will readily conceive of other implementations of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the following claims.

[0119] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A control method for preventing an electric drive axle from disengaging, characterized in that: include: Obtaining the first stroke position of the fork in the electric drive axle; Based on the first stroke position, determining whether the shift fork has a tendency to disengage; If the shift fork has a tendency to shift out of gear, a torque limiting function of the motor corresponding to the shift fork is activated, and the torque limiting function is used to reduce the torque of the motor corresponding to the shift fork to update the stroke position of the shift fork to a second stroke position without a tendency to shift out of gear.

2. The control method for preventing the electric drive axle from disengaging according to claim 1, characterized in that: Also includes: When the stroke position of the fork is updated to the second stroke position, the torque limiting function of the motor is disabled.

3. The control method for preventing the electric drive axle from disengaging according to claim 1 or 2, characterized in that: The electric drive bridge includes a first electric drive bridge and a second electric drive bridge, and the method further includes: When torque limitation is performed on the motor in the first electric drive axle, torque compensation is performed on the motor in the second electric drive axle, wherein the torque value for torque compensation is equal to the torque value for torque limitation.

4. The control method for preventing the electric drive axle from disengaging according to claim 3, characterized in that: Also includes: When the torque limiting function is disabled for the motor in the first electric drive axle, the torque compensation for the motor in the second electric drive axle is stopped.

5. The control method for preventing the electric drive axle from disengaging according to claim 1 or 2, characterized in that: The determining whether the fork has a tendency to disengage based on the first stroke position includes: If the first stroke position is less than the shift-out threshold, it is determined that the shift fork has a shift-out tendency; If the first stroke position is greater than or equal to the gear-out threshold, it is determined that the shift fork has no gear-out tendency.

6. A control system for preventing an electric drive axle from disengaging, characterized in that: include: Position acquisition component, used to monitor the travel position of the fork in the electric drive axle; A gearbox controller is connected to the position acquisition component and is used to execute the electronic anti-shift control method of the electric drive axle according to any one of claims 1 to 5.

7. The control system for preventing the electric drive axle from disengaging according to claim 6, characterized in that: The position acquisition component includes a shift fork sensor, and the shift fork sensor is arranged on a shift actuator in the electric drive axle.

8. A control device for preventing an electric drive axle from disengaging, characterized in that: include: A fork position monitoring module, used to obtain the first stroke position of the fork in the electric drive axle; a judging module, configured to judge whether the shift fork has a tendency to disengage based on the first stroke position; The torque control module is used to activate the torque limiting function of the motor corresponding to the shift fork when the shift fork has a tendency to shift out of gear, and the torque limiting function is used to reduce the torque of the motor corresponding to the shift fork to update the stroke position of the shift fork to a second stroke position without a tendency to shift out of gear.

9. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory is used to store computer-executable instructions; The processor is configured to execute the computer-executable instructions to implement the method according to any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, which are used to implement the method according to any one of claims 1 to 5 when executed.

11. A computer program product, comprising a computer program, characterized in that When the computer program is executed, the method according to any one of claims 1 to 5 is implemented.

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