Gear shift control method, device, gear shift controller and vehicle

Abstract

The present application relates to a shift control method, device, shift controller, and vehicle. The method includes: obtaining first motion information of a shift actuator when controlling the shift actuator to execute a shift action; obtaining a matching result between the current position information of a synchronizer and a target synchronization stroke when the first motion information of the shift actuator satisfies a first preset low-speed operating condition; the target synchronization stroke is used to represent the synchronization slip stroke between the synchronization start position and the synchronization complete position of the synchronizer and the shift gear; and determining an identification result of the synchronizer's shift top tooth condition based on the matching result, wherein the identification result is used to indicate the shift control progress. This method can improve shift performance.

Description

Technical Field

[0001] The present application relates to the technical field of AMT transmissions, and in particular to a shift control method, device, shift controller and vehicle. Background Art

[0002] As demand for driving comfort increases, commercial vehicles are increasingly adopting automatic transmissions instead of manual transmissions to reduce driver workload. Most commercial vehicles are equipped with AMTs (Automatic Mechanical Transmissions). AMTs offer advantages such as high transmission efficiency, low cost, and excellent fuel economy. Consequently, their use has become increasingly widespread in recent years.

[0003] The AMT controller sends commands to the shift actuator to control the corresponding shift action to complete the gear shift. However, during the shift process, the synchronizer may cause the gear to hit the gear due to the small speed difference, which increases the shift time or even causes the shift to fail, resulting in poor shift performance. Summary of the Invention

[0004] Based on this, it is necessary to provide a shift control method, device, shift controller and vehicle that can improve shift performance in order to address the above technical problems.

[0005] In a first aspect, the present application provides a shift control method. The method comprises:

[0006] When controlling the shift actuator to perform a shift-up action, obtaining first motion information of the shift actuator;

[0007] When the first motion information of the shift actuator satisfies a first preset low-speed operation condition, obtaining a matching result between the current position information of the synchronizer and a target synchronization stroke; the target synchronization stroke is used to represent a synchronization slip stroke between a synchronization start position and a synchronization complete position of the synchronizer and the forward gear;

[0008] An identification result of the synchronizer forward gear top tooth condition is determined according to the matching result, and the identification result is used to indicate a shift control process.

[0009] In one embodiment, determining the recognition result of the synchronizer forward gear top tooth condition according to the matching result includes:

[0010] When the current position information of the synchronizer does not match the target synchronization stroke, it is determined that no top tooth fault occurs during the synchronizer shifting process.

[0011] In one embodiment, determining the identification result of the synchronizer forward gear top tooth condition based on the matching result includes: when the current position information of the synchronizer matches the target synchronization stroke, determining that a top tooth fault occurs in the synchronizer forward gear process.

[0012] In one embodiment, determining the recognition result of the synchronizer forward gear top tooth condition according to the matching result includes:

[0013] When the current position information of the synchronizer matches the target synchronization stroke, obtaining the displacement of the shift actuator within a preset waiting time;

[0014] acquiring second motion information of the shift actuator according to the displacement of the shift actuator within a preset waiting time;

[0015] When the second motion information satisfies a second preset low-speed operation condition, it is determined that a top tooth fault occurs during the synchronizer shift-forward process.

[0016] In one embodiment, obtaining the matching result between the current position information of the synchronizer and the target synchronization stroke includes:

[0017] Obtaining a current displacement of the shift actuator relative to a neutral position;

[0018] The current displacement of the shift actuator compared to the neutral position is compared with a preset synchronization distance, and the matching result is determined based on the comparison result; the preset synchronization distance is used to represent the movement distance of the shift actuator when the synchronizer is in the synchronization starting position compared to the neutral position.

[0019] In one embodiment, the method further comprises:

[0020] When it is determined that a top tooth fault occurs during the synchronizer shifting process, controlling the clutch to engage to a preset target position and controlling the engine torque to a first preset target torque;

[0021] Acquire third motion information of the shift actuator, and determine that the top tooth fault during the synchronizer shifting process is resolved if the third motion information meets a preset high-speed operation condition.

[0022] In one embodiment, the method further comprises:

[0023] When the third motion information does not meet the preset high-speed operation condition, controlling the engine torque to a second preset target torque; the second preset target torque is greater than the first preset target torque;

[0024] Acquire fourth motion information of the shift actuator, and determine that the top tooth fault in the synchronizer shifting process is resolved when the fourth motion information meets a preset high-speed operation condition.

[0025] In one embodiment, before controlling the clutch to engage to the preset target position, the method further includes:

[0026] controlling the clutch to perform a disengagement action;

[0027] When the clutch is in a completely disengaged state, an identification result of the current synchronizer forward gear top tooth condition is obtained.

[0028] In a second aspect, the present application further provides a shift control device. The device comprises:

[0029] an acquisition module, configured to acquire first motion information of the shift actuator when controlling the shift actuator to perform a shift-up action;

[0030] a position module, configured to obtain a matching result between the current position information of the synchronizer and a target synchronization stroke when the first motion information of the shift actuator satisfies a first preset low-speed operation condition; the target synchronization stroke is used to represent a synchronization slip stroke between a synchronization start position and a synchronization complete position of the synchronizer and the forward gear;

[0031] A diagnostic module is used to determine an identification result of the synchronizer's forward gear top tooth condition based on the matching result, and the identification result is used to indicate the shift control process.

[0032] In a third aspect, the present application also provides a shift controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of the shift control method provided in the first aspect of the present application are implemented.

[0033] In a fourth aspect, the present application further provides a vehicle, which includes the shift controller provided in the third aspect of the present application.

[0034] The shift control method, device, shift controller, and vehicle described above acquire first motion information of the shift actuator when controlling the shift actuator to execute a shift action. When the first motion information of the shift actuator satisfies a first preset low-speed operating condition, a matching result between the current position information of the synchronizer and the target synchronization stroke is acquired, and an identification result of the synchronizer's forward gear top condition is determined based on the matching result. The identification result is used to indicate the shift control process. The present application first pre-determines whether the motion information of the shift actuator meets the first preset low-speed operating condition, and then determines the relationship between the current position of the synchronizer and the starting position of the synchronization process to eliminate interference caused by the actuator's excessively low motion speed during the synchronizer shift synchronization process. This allows accurate identification of whether a synchronizer forward gear top fault has occurred. Based on this identification result, when a forward gear top fault has occurred, a corresponding fault handling strategy can be promptly executed to continue the shift process. If a forward gear top fault has not occurred, the shift solenoid valve can continue to be controlled to open, thereby reducing the risks of increased shift time and shift failure, thereby improving shift performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 1 is a flow chart of a shift control method according to an embodiment;

[0036] Figure 2 A flowchart of the steps of obtaining matching results in one embodiment;

[0037] Figure 3 A schematic diagram of a flow chart of a step of determining a recognition result in one embodiment;

[0038] Figure 4 is a flow chart of a shift control method according to another embodiment;

[0039] Figure 5 is a flow chart of a shift control method according to another embodiment;

[0040] Figure 6 is a schematic flow chart of determining an identification result of a shift control method in another embodiment;

[0041] Figure 7 A schematic flow chart of a method for eliminating a top gear fault in a shift control method according to another embodiment;

[0042] Figure 8 FIG. 4 is a structural block diagram of a shift control device in one embodiment. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0044] An embodiment of the present application provides a gear shift control method, which can be applied to a transmission control unit (TCU). The TCU is mainly used for gear management of a transmission and real-time torque distribution.

[0045] An AMT shift control system typically consists of two independent control units: the Transmission Control Unit (TCU) and the Motor Control Unit (MCU). The TCU is connected to the shift motor, which is mounted on the shift actuator. The TCU controls the shift actuator through the shift motor to execute the shift action. The MCU is connected to the drive motor, and data and commands are transmitted between the TCU and MCU via the CAN bus. The TCU continuously determines whether to update the target gear based on signals collected, including vehicle speed, accelerator pedal position, and vehicle acceleration. The TCU can also send torque unloading commands, free mode commands, speed regulation commands, random torque control commands, and torque loading commands to the MCU.

[0046] In one embodiment, Figure 1 As shown, a shift control method is provided, which is applied to Figure 1 The transmission control unit in FIG. 1 is used as an example to illustrate the process, including the following steps:

[0047] Step 202 : when controlling the shift actuator to perform a shift-up action, obtaining first motion information of the shift actuator.

[0048] The first movement information includes the current movement speed of the shift actuator when the shift actuator performs the shift-up action.

[0049] For example, the transmission control unit (TCU) determines when a gear shift is necessary based on real-time data from vehicle sensors, such as vehicle speed, accelerator pedal position, and engine speed. Once the shift conditions are met, the TCU issues a synchronizer shift command to the shift solenoid valve, controlling the shift actuator to engage the shift action. While controlling the shift solenoid valve to open and the shift actuator to engage the shift action, the TCU obtains the current speed of the shift actuator.

[0050] In an optional embodiment, the transmission control unit may obtain the position of the shift actuator via a shift position sensor, and then calculate the current movement speed of the shift actuator based on the position change of the shift actuator within a certain period.

[0051] Step 204 : When the first motion information of the shift actuator satisfies the first preset low-speed operation condition, a matching result between the current position information of the synchronizer and the target synchronization stroke is obtained.

[0052] Exemplarily, the transmission control unit compares a current movement speed in first movement information of the shift actuator with a first preset speed, where the first preset speed can be a speed set by calibration. If the current movement speed in the first movement information is less than the first preset speed, the first movement information satisfies a first preset low-speed operation condition; if the current movement speed in the first movement information is greater than or equal to the first preset speed, the first movement information does not satisfy the first preset low-speed operation condition.

[0053] When the first motion information of the shift actuator does not meet the first preset low-speed operation condition, the transmission control unit of the embodiment of the present application determines that the synchronizer has not had a gear shift top tooth failure, and the transmission control unit continues to control the shift solenoid valve to open, and controls the shift actuator to continue to perform the gear shift action.

[0054] The transmission control unit of an embodiment of the present application obtains a matching result between the current position information of the synchronizer and the target synchronization stroke when the first motion information of the shift actuator satisfies a first preset low-speed operating condition. The target synchronization stroke represents the synchronization slip distance between the synchronizer's starting position at which synchronization of the synchronizer and the forward gear begins and the synchronizer's full position at which synchronization is completed. This matching result can be used to indicate whether the synchronizer's current position exceeds or reaches the starting position for the synchronization process.

[0055] Step 206 : determining the recognition result of the synchronizer forward gear top gear condition based on the matching result, and the recognition result is used to indicate the shift control process.

[0056] When the shift actuator's movement speed meets the first preset low-speed operating condition, a gear-entry toothing failure may occur due to a too-small synchronization window, resulting in a reduction in movement speed. Alternatively, the shift actuator's movement speed may be too low during the synchronizer shift synchronization process. To eliminate interference caused by the actuator's too-low movement speed during the synchronizer shift synchronization process, the transmission control unit of the embodiment of the present application obtains a match between the synchronizer's current position information and the target synchronization stroke, and then determines whether a synchronizer gear-entry toothing failure has occurred based on the match.

[0057] In the above-mentioned shift control method, when controlling the shift actuator to execute a shift action, first motion information of the shift actuator is obtained. When the first motion information of the shift actuator satisfies a first preset low-speed operating condition, a matching result between the current position information of the synchronizer and the target synchronization stroke is obtained, and an identification result of the synchronizer's forward gear top condition is determined based on the matching result. The identification result is used to indicate the shift control process. The embodiment of the present application first pre-determines whether the motion information of the shift actuator meets the first preset low-speed operating condition, and then determines the relationship between the current position of the synchronizer and the starting position of the synchronization process to eliminate interference caused by the actuator's excessively low motion speed during the synchronizer shift synchronization process. This can accurately identify whether a synchronizer forward gear top fault has occurred. Based on this identification result, when a forward gear top fault has occurred, a corresponding fault handling strategy can be promptly executed to resume the shift process. If a forward gear top fault has not occurred, the shift solenoid valve can continue to be controlled to open, thereby reducing the risks of increased shift time and shift failure, thereby improving shift performance.

[0058] In such Figure 1 In an optional implementation of the embodiment, as Figure 2 As shown, the steps of obtaining the matching result of the current position information of the synchronizer and the target synchronization stroke include:

[0059] Step 202 : Obtain the current displacement of the shift actuator compared to the neutral position.

[0060] Step 204 : comparing the current displacement of the shift actuator relative to the neutral position with a preset synchronization distance, and determining a matching result based on the comparison result.

[0061] The preset synchronization distance is used to represent the movement distance of the shift actuator when the synchronizer is in the synchronization start position compared to the neutral position.

[0062] For example, the position of the sliding sleeve when it is in neutral is used as a reference standard. For example, the position of the shift actuator when the sliding sleeve is in neutral is recorded as 0. Relative to the neutral position, the distance from the position of the shift actuator to the neutral position when the synchronization process starts is, for example, 4 to 5 mm, as the preset synchronization distance.

[0063] The transmission control unit of the embodiment of the present application obtains the current displacement of the shift actuator compared to the neutral position, compares the current displacement with the preset synchronization distance, determines the matching result based on the comparison result, and then determines the identification result of the synchronizer's top gear condition based on the matching result.

[0064] For example, if the current displacement is less than or equal to the preset synchronization distance, it means that the synchronizer is in the synchronization process at this time, and the current position information of the synchronizer does not match the target synchronization stroke. It is determined that no top tooth fault occurs during the synchronizer shift process. At this time, the shift solenoid valve continues to be controlled to open, and the shift actuator performs the shift action; if the current displacement is greater than the preset synchronization distance, it means that the synchronizer synchronization process has ended, and the current position information of the synchronizer matches the target synchronization stroke. It is determined that a top tooth fault occurs during the synchronizer shift process. At this time, the corresponding top tooth fault handling strategy is executed in time.

[0065] In another preferred embodiment, Figure 3 As shown, the step of determining the recognition result of the synchronizer forward gear top tooth condition according to the matching result includes:

[0066] Step 302 : When the current position information of the synchronizer matches the target synchronization stroke, the displacement of the shift actuator within a preset waiting time is obtained.

[0067] Step 304 : Acquire second motion information of the shift actuator according to the displacement of the shift actuator after the preset waiting time.

[0068] Step 306 : When the second motion information satisfies the second preset low-speed operation condition, it is determined that a top gear fault occurs during the synchronizer shift-up process.

[0069] The second movement information may include a movement speed of the shift actuator during a preset waiting time.

[0070] For example, if the current displacement of the shift actuator is greater than a preset synchronization position, a timer is started and the current timer time is continuously acquired. After the timer time reaches a preset waiting time, the position of the shift actuator after the preset waiting time is acquired, and a second movement speed of the shift actuator is calculated. The second movement speed is compared with a second preset speed, which may be a speed set through calibration. If the second movement speed is greater than the second preset speed, it is determined that a top gear fault has not occurred. If the second movement speed is less than or equal to the second preset speed, it is determined that a top gear fault has occurred during the synchronizer shift process.

[0071] In an embodiment of the present application, if the current displacement is greater than the preset synchronization distance, it means that the synchronizer synchronization process has ended, and the current position information of the synchronizer matches the target synchronization stroke. At this time, it is not directly determined whether a top tooth fault occurs during the synchronizer shift process, but a confirmation time is set to further ensure the accuracy of the top tooth fault judgment.

[0072] In the shift control process, the embodiment of the present application further provides a fault handling strategy for identifying a synchronizer forward gear top gear fault. The top gear fault handling strategy of the embodiment of the present application in the shift control method process will be described below.

[0073] In one embodiment, Figure 4 As shown, the shift control method of the embodiment of the present application further includes:

[0074] Step 402 : When it is determined that a top tooth fault occurs during the synchronizer shift-in process, the clutch is controlled to engage to a preset target position and the engine torque is controlled to a first preset target torque.

[0075] Step 404 : obtaining third motion information of the shift actuator, and determining that the top tooth fault in the synchronizer shifting process is resolved when the third motion information meets a preset high-speed operation condition.

[0076] In this embodiment of the present application, after a top gear fault occurs and triggers top gear fault processing, the transmission control unit can obtain the clutch position through the clutch position sensor and control the clutch to engage to a preset target position to transmit torque. The actual engine torque is then obtained through CAN bus messages and controlled to reach a first preset target torque. Synchronizer misalignment is achieved by applying a torque at the input.

[0077] Optionally, before controlling the clutch to engage to a preset target position, the transmission control unit may first control the clutch to disengage. The transmission control unit obtains the clutch position via a clutch position sensor and determines whether the clutch is fully disengaged based on the clutch position. When the clutch is fully disengaged, the control unit obtains the current synchronizer forward gear top gear condition. Specifically, while the clutch remains in the fully disengaged state, an indicator is obtained to indicate whether a top gear fault has occurred. If no top gear fault indicator is present, the top gear fault has been resolved. If a top gear fault indicator is present, the control unit proceeds to control the clutch to engage to the preset target position.

[0078] After the engine reaches the first preset target torque, the transmission control unit can obtain third motion information of the shift actuator. The third motion information includes a third motion speed of the shift actuator after the engine reaches the first preset target torque. The transmission control unit compares the third motion speed with a third preset speed, which can be set through calibration. If the third motion speed is greater than or equal to the third preset speed, the third motion information satisfies the preset high-speed operating condition, and the top gear fault during the synchronizer shift process is resolved.

[0079] In such Figure 4 In an optional implementation of the embodiment shown, as Figure 5 As shown, the shift control method of the embodiment of the present application further includes:

[0080] Step 502 : When the third motion information does not satisfy the preset high-speed operation condition, control the engine torque to a second preset target torque.

[0081] The second preset target torque is greater than the first preset target torque.

[0082] Step 504 : Acquire fourth motion information of the shift actuator, and determine that the top gear fault during the synchronizer shifting process is resolved if the fourth motion information meets a preset high-speed operation condition.

[0083] For example, if the third movement speed is less than the third preset speed, the third movement information does not meet the preset high-speed operating condition, and the transmission control unit continues to control the increase of engine torque, raising the actual engine torque to the second preset torque. After the actual engine torque reaches the second preset torque, the transmission control unit can obtain fourth movement information from the shift actuator, which includes the fourth movement speed of the shift actuator after the engine reaches the second preset target torque. The transmission control unit compares the fourth movement speed with the third preset speed. If the fourth movement speed is greater than or equal to the third preset speed, the fourth movement information meets the preset high-speed operating condition, and the top tooth fault during the synchronizer shift process is resolved.

[0084] After the top tooth fault is eliminated during the synchronizer shift process, the transmission control unit controls the clutch to completely disengage, and the top tooth fault handling process ends.

[0085] In this embodiment, when the top tooth fault is not resolved in time, the engine target torque is increased to transmit greater torque to the input shaft, driving the synchronizer and the gear to rotate a certain angle to speed up the tooth misalignment during the gear shifting process, further accelerating the gear shifting speed, reducing the gear shifting time, improving the gear shifting success rate, and increasing the service life of the gear.

[0086] In one embodiment, a shift control method is also provided. Figure 6 and Figure 7 , the shift control method includes the following process:

[0087] Step A: At the start time, first wait for the synchronizer gear engagement instruction. If there is no synchronizer gear shift instruction, continue to maintain the synchronizer's current gear. If there is a gear shift command, proceed to the next step.

[0088] In step B, the transmission control unit controls the shift solenoid valve to open, causing the shift actuator to engage the shifter. The shift position sensor detects the actuator position and calculates the actuator speed. The actuator speed is calculated based on the change in the shift actuator position over a specific period.

[0089] Step C compares the actuator speed with a preset speed V1, which can be set through calibration. If the actuator speed is greater than or equal to the preset speed V1, the shift solenoid valve is opened, causing the shift actuator to shift into the next gear. If the actuator speed is less than the preset speed V1, the shift actuator displacement is compared with a preset synchronization position, which can be set through calibration.

[0090] In step D, if the actuator displacement is less than or equal to the preset synchronization position, the synchronizer is currently in the synchronization process. The shift solenoid valve continues to open, and the shift actuator initiates the shift action. If the actuator displacement is greater than the preset synchronization position, the synchronizer synchronization process has concluded. The synchronizer has now engaged the forward gear. A timer is started, and the current timer value is retrieved.

[0091] In step E, if the current timer value is less than the preset time, the timer value is continuously acquired. If the current timer value is greater than or equal to the preset time, the position of the shift actuator is acquired and the actuator speed is calculated. The actuator speed is calculated based on the change in the shift actuator position within a certain period.

[0092] Step F compares the actuator speed with a preset speed V2, which can be set through calibration. V1 and V2 are independent of each other. If the actuator speed is greater than V2, a top gear fault is determined not to have occurred. If the actuator speed is less than or equal to V2, a top gear fault is determined to have occurred during the synchronizer shift process.

[0093] Step G: If a top gear fault is detected during the synchronizer shift process, the transmission control unit first controls the clutch to fully disengage and obtains the clutch position through the clutch position sensor. The clutch position is used to determine whether the clutch is fully disengaged.

[0094] Step H: If the clutch is not completely disengaged, the clutch is controlled to continue to disengage. If the clutch is completely disengaged, the clutch is kept in the completely disengaged state.

[0095] Step I: Get an indicator of whether a top tooth fault has occurred. If there is no top tooth fault indicator, it means that the top tooth fault has been resolved. If there is a top tooth fault indicator, proceed to the next step.

[0096] Step J: Control the clutch to engage at a preset position, and obtain the clutch position via the clutch position sensor. If the clutch is not engaged at the preset position, continue controlling the clutch to engage at the preset position. If the clutch is engaged at the preset position, proceed to the next step.

[0097] Step K: Control the engine torque to a preset target torque, obtain the actual engine torque via the CAN bus message, and continue to control the engine torque if the actual engine torque has not reached the preset target torque. If the actual engine torque has reached the target torque, obtain the shift actuator displacement.

[0098] Step L: Calculate the actuator movement speed. The actuator movement speed is calculated based on the position change of the shift actuator within a certain period.

[0099] Step M, compares the actuator movement speed with the preset speed V3, which is a speed that can be set through calibration. V3 has no size relationship with the preset speed V1 and the preset speed V2. If the actuator movement speed is less than the preset speed V3, the preset target torque of the engine is increased, and the engine torque is continued to be controlled to the preset target torque. The actual engine torque is obtained through the CAN bus message. If the actual engine torque does not reach the preset target torque, the engine torque is continued to be controlled. If the actual engine torque has reached the target torque, the shift actuator displacement is obtained. Calculate the actuator movement speed. The actuator movement speed is calculated by the position change of the shift actuator within a certain period.

[0100] In step N, if the actuator speed is greater than or equal to the preset speed V3, the synchronizer gear shift process top gear fault is resolved. The clutch is controlled to fully disengage, and the clutch position is used to determine whether the clutch actuator has reached the fully disengaged position. If the clutch is not fully disengaged, the clutch is controlled to disengage. If the clutch actuator has not reached the fully disengaged position, the top gear fault handling process ends.

[0101] The embodiments of the present application can solve the problem of tooth top-jamming during synchronizer shifting using pneumatic or electric actuators, thereby improving the shift success rate, reducing shift time, and increasing the service life of the gears. Specifically, the embodiments have the following beneficial effects:

[0102] (1) First, the movement speed of the shift actuator is compared with the preset speed, and then the position of the shift actuator is compared with the preset synchronization position to eliminate the interference caused by the actuator movement speed being too low during the synchronizer shift synchronization process. At the same time, a confirmation time is set to ensure the accuracy of the top tooth fault judgment.

[0103] (2) Secondly, after a top tooth fault occurs and triggers the top tooth fault processing, the clutch is first completely disengaged to eliminate the clutch's influence on the synchronizer shift process. The clutch is engaged to the preset position to transmit torque. By controlling the actual engine torque to the preset target torque, a torque is applied to the input end to complete the synchronizer shift. The relationship between the shift actuator movement speed and the preset speed is compared. When its movement speed is greater than the preset speed, it means that the top tooth fault processing is completed.

[0104] (3) Finally, if the top gear fault is not resolved in time, the target torque of the engine is increased, thereby transmitting greater torque to the input shaft, driving the synchronizer and the gear to rotate a certain angle to accelerate the tooth misalignment during the gear shift process. This speeds up the gear shifting process, reduces the gear shifting time, improves the gear shift success rate, and increases the service life of the gear.

[0105] It should be understood that, although the various steps in the flowcharts involved in the various embodiments described above are displayed in sequence according to the instructions of the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be executed in other orders. Moreover, at least a portion of the steps in the flowcharts involved in the various embodiments described above can include multiple steps or multiple stages, and these steps or stages are not necessarily executed and completed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0106] Based on the same inventive concept, embodiments of the present application also provide a shift control device for implementing the aforementioned shift control method. The solution provided by this device is similar to the solution described in the aforementioned method. Therefore, the specific limitations of one or more of the shift control device embodiments provided below can be found in the aforementioned limitations of the shift control method and will not be further elaborated here.

[0107] In one embodiment, Figure 8 As shown, a shift control device is provided, including: an acquisition module 802, a position module 804 and a diagnosis module 806, wherein:

[0108] The acquisition module 802 is configured to acquire first motion information of the shift actuator when controlling the shift actuator to perform a shift-up action.

[0109] The position module 804 is used to obtain the matching result between the current position information of the synchronizer and the target synchronization stroke when the first motion information of the shift actuator meets the first preset low-speed operation condition; the target synchronization stroke is used to represent the synchronization slip stroke between the synchronization start position and the synchronization complete position of the synchronizer and the forward gear.

[0110] The diagnosis module 806 is used to determine the recognition result of the synchronizer forward gear top gear condition based on the matching result, and the recognition result is used to indicate the shift control process.

[0111] Each module in the aforementioned shift control device may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a computer device memory in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0112] In one embodiment, the present application further provides a shift controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, the steps of the shift control method in the above-described embodiment are implemented. To avoid repetition, these steps are not described here. Alternatively, when the processor executes the computer program, the functions of the various modules in the shift control device embodiment are implemented. To avoid repetition, these steps are not described here.

[0113] In one embodiment, the present invention further provides a readable storage medium storing a computer program. When executed by a processor, the computer program implements the steps of the shift control method in the above-described embodiment. To avoid repetition, these steps are not described here. Alternatively, when the processor executes the computer program, the functions of the various modules in the shift control device embodiment are implemented. To avoid repetition, these steps are not described here.

[0114] In one embodiment, the present application also provides a vehicle, which is equipped with a shift controller provided in an embodiment of the present application.

[0115] 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 used for analysis, stored data, displayed data, etc.) involved in this 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 must comply with the relevant laws, regulations and standards of relevant countries and regions.

[0116] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the above-mentioned embodiments. In particular, any reference to memory, database, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The databases involved in the various embodiments provided herein may include at least one of a relational database and a non-relational database. Non-relational databases may include, but are not limited to, distributed databases based on blockchains. The processors involved in the various embodiments provided herein may be, but are not limited to, general-purpose processors, central processing units (CPUs), graphics processing units (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), data processing logic devices based on quantum computing, and the like.

[0117] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0118] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. A shift control method, characterized in that: The method comprises: When controlling a shift actuator to perform a shift-up action, obtaining first motion information of the shift actuator; the first motion information includes a current motion speed of the shift actuator when the shift actuator performs the shift-up action; When the first motion information of the shift actuator satisfies a first preset low-speed operation condition, obtaining a matching result between the current position information of the synchronizer and a target synchronization stroke; the target synchronization stroke is used to represent a synchronization slip stroke between a synchronization start position and a synchronization complete position of the synchronizer and the forward gear; Determining an identification result of the synchronizer forward gear top tooth condition according to the matching result, wherein the identification result is used to indicate a shift control process; Determining the recognition result of the synchronizer forward gear top tooth condition according to the matching result includes: When the current position information of the synchronizer does not match the target synchronization stroke, determining that no top tooth fault occurs during the synchronizer shifting process; Determining the recognition result of the synchronizer forward gear top tooth condition according to the matching result includes: When the current position information of the synchronizer matches the target synchronization stroke, obtaining the displacement of the shift actuator within a preset waiting time; acquiring second motion information of the shift actuator according to the displacement of the shift actuator within a preset waiting time; the second motion information includes a motion speed of the shift actuator during the preset waiting time; When the second motion information satisfies a second preset low-speed operation condition, it is determined that a top tooth fault occurs during the synchronizer shift-forward process.

2. The method according to claim 1, characterized in that The obtaining of the matching result between the current position information of the synchronizer and the target synchronization stroke includes: Obtaining a current displacement of the shift actuator relative to a neutral position; The current displacement of the shift actuator compared to the neutral position is compared with a preset synchronization distance, and the matching result is determined based on the comparison result; the preset synchronization distance is used to represent the movement distance of the shift actuator when the synchronizer is in the synchronization starting position compared to the neutral position.

3. The method according to claim 1, characterized in that The method further comprises: When it is determined that a top tooth fault occurs during the synchronizer shifting process, controlling the clutch to engage to a preset target position and controlling the engine torque to a first preset target torque; Obtain third motion information of the shift actuator, and determine that the top tooth fault in the synchronizer shift process is resolved when the third motion information meets a preset high-speed operation condition; the third motion information includes a third motion speed of the shift actuator after the engine reaches a first preset target torque.

4. The method according to claim 3, characterized in that The method further comprises: When the third motion information does not meet the preset high-speed operation condition, controlling the engine torque to a second preset target torque; the second preset target torque is greater than the first preset target torque; Obtain fourth motion information of the shift actuator, and determine that the top tooth fault in the synchronizer shift process is resolved when the fourth motion information meets a preset high-speed operation condition; the fourth motion information includes a fourth motion speed of the shift actuator after the engine reaches a second preset target torque.

5. The method according to claim 3, characterized in that Before controlling the clutch to engage to the preset target position, it also includes: controlling the clutch to perform a disengagement action; When the clutch is in a completely disengaged state, an identification result of the current synchronizer forward gear top tooth condition is obtained.

6. A gear shift control device, characterized in that: The device comprises: an acquisition module, configured to acquire first motion information of the shift actuator when controlling the shift actuator to perform a shift-up action; the first motion information includes a current motion speed of the shift actuator when the shift actuator performs the shift-up action; a position module, configured to obtain a matching result between the current position information of the synchronizer and a target synchronization stroke when the first motion information of the shift actuator satisfies a first preset low-speed operation condition; the target synchronization stroke is used to represent a synchronization slip stroke between a synchronization start position and a synchronization complete position of the synchronizer and the forward gear; a diagnostic module, configured to determine an identification result of a condition of a top gear of the synchronizer during a gear shift according to the matching result, wherein the identification result is used to indicate a gear shift control process; Determining the recognition result of the synchronizer forward gear top tooth condition according to the matching result includes: When the current position information of the synchronizer does not match the target synchronization stroke, determining that no top tooth fault occurs during the synchronizer shifting process; Determining the recognition result of the synchronizer forward gear top tooth condition according to the matching result includes: When the current position information of the synchronizer matches the target synchronization stroke, obtaining the displacement of the shift actuator within a preset waiting time; acquiring second motion information of the shift actuator according to the displacement of the shift actuator within a preset waiting time; the second motion information includes a motion speed of the shift actuator during the preset waiting time; When the second motion information satisfies a second preset low-speed operation condition, it is determined that a top tooth fault occurs during the synchronizer shift-forward process.

7. A shift controller, characterized in that: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the shift control method according to any one of claims 1 to 5 when executing the computer program.

8. A vehicle, characterized in that: Comprising the shift controller as claimed in claim 7.

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