Control method for vehicle gear shifting

Abstract

The application provides a control method for gear shifting of a vehicle. The control method comprises: obtaining an initial gear and an initial target gear of the vehicle; in the case that it is detected that the initial target gear is likely to change, determining an intermediate gear of the vehicle according to a current gear shifting stage of the vehicle; adjusting the current gear of the vehicle to the intermediate gear; determining a final target gear of the vehicle according to a pedal opening degree of the vehicle; and adjusting the current gear of the vehicle from the intermediate gear to the final target gear. By setting the intermediate gear, the vehicle can be adjusted to the intermediate gear in the case that the driver frequently changes the target gear, and the vehicle is directly adjusted from the intermediate gear to the final target gear after the driver determines the final target gear. The vehicle is not required to be adjusted from the initial target gear to the final target gear after completing the whole gear shifting process, so that the gear shifting time of the vehicle is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a method for controlling vehicle gear shifting. Background Technology

[0002] With the rapid development of the automotive industry, the market now demands increasingly faster speeds for gear shifting. Especially when drivers frequently shift gears while driving, responding quickly to their shifting needs is a critical issue for the industry. However, current vehicles, when faced with consecutive gear shifts in a short period, must complete the current shift before responding to the driver's next request, significantly increasing shifting time. Summary of the Invention

[0003] This application provides a method for controlling vehicle gear shifting, which can reduce the time required for vehicle gear shifting.

[0004] According to a first aspect of the embodiments of this specification, a vehicle gear shifting control method is provided, comprising:

[0005] The system acquires the vehicle's initial gear and initial target gear; if a change in the initial target gear is detected, it determines the vehicle's intermediate gear based on the vehicle's current shift stage; it adjusts the vehicle's current gear to the intermediate gear; it determines the vehicle's final target gear based on the vehicle's pedal opening, wherein the pedal opening includes the accelerator pedal opening or the brake pedal opening; and it adjusts the vehicle's current gear from the intermediate gear to the final target gear.

[0006] Optionally, detecting whether the initial target gear might change includes:

[0007] The vehicle's acceleration, the gearbox output shaft's rotational speed, and the brake pedal's opening are acquired. If the gearbox output shaft's rotational speed is greater than a preset speed threshold, the brake pedal's opening is greater than a first preset opening threshold, and the vehicle's acceleration is less than a preset acceleration threshold, the initial target gear may change.

[0008] Optionally, determining the intermediate gear of the vehicle based on the current shifting stage includes:

[0009] If the current shifting phase of the vehicle is a torque reduction phase or a disengagement phase, then the intermediate gear is determined to be the initial gear of the vehicle.

[0010] Optionally, when the current shifting phase of the vehicle is a torque reduction phase or a disengagement phase, determining the final target gear of the vehicle based on the pedal opening includes:

[0011] The accelerator pedal opening of the vehicle is obtained; if the accelerator pedal opening is greater than a preset accelerator threshold, the final target gear is determined as the initial target gear; if the accelerator pedal opening is less than the preset accelerator threshold, the final target gear is determined as the intermediate gear.

[0012] Optionally, determining the intermediate gear of the vehicle based on the current shifting stage of the vehicle includes:

[0013] If the current gear shifting phase of the vehicle is the speed adjustment phase, then the intermediate gear is determined to be neutral.

[0014] Optionally, when the current shift phase of the vehicle is a speed adjustment phase, determining the final target gear of the vehicle based on the pedal opening includes:

[0015] Obtain the brake pedal opening of the vehicle and the optimal gear of the vehicle; if the brake pedal opening is less than a second preset opening threshold, determine the final target gear as the optimal gear of the vehicle.

[0016] Optionally, adjusting the vehicle's current gear from the intermediate gear to the final target gear includes:

[0017] The rotational speed of the vehicle's transmission output shaft and the accelerator pedal opening are obtained; the optimal gear of the vehicle is determined based on the rotational speed of the vehicle's transmission output shaft and the accelerator pedal opening; if the optimal gear and the final target gear are consistent, the current gear of the vehicle is adjusted to the final target gear.

[0018] Optionally, before detecting a possible change in the initial target gear, the control method further includes:

[0019] When the current shift phase of the vehicle is a torque reduction phase, the target torque of the vehicle's drive motor is obtained; the torque of the drive motor is adjusted to the target torque; during the process of adjusting the current torque of the drive motor to the target torque, it is detected whether the initial target gear may change.

[0020] Optionally, before detecting a possible change in the initial target gear, the control method further includes:

[0021] When the current shifting phase of the vehicle is the disengaged phase, the target position of the shift fork of the vehicle is obtained; the position of the shift fork is adjusted to the target position; during the adjustment of the position of the shift fork to the target position, it is detected whether the initial target gear may change.

[0022] Optionally, before detecting a possible change in the initial target gear, the control method further includes:

[0023] When the current shifting phase of the vehicle is a speed adjustment phase, the target speed of the vehicle's drive motor is obtained; the speed of the drive motor is adjusted to the target speed; during the process of adjusting the speed of the drive motor to the target speed, it is detected whether the initial target gear may change.

[0024] The technical solutions provided in the embodiments of this specification may include the following beneficial effects:

[0025] The system detects whether the driver's initial target gear might change during vehicle operation. If the initial target gear might change, the vehicle's current gear is shifted to an intermediate gear. Based on the pedal opening, the final target gear is determined, and the vehicle is shifted from the intermediate gear to the final target gear. By setting an intermediate gear as a transitional gear during gear shifting, the vehicle can first shift to an intermediate gear when the driver frequently changes the target gear, until the driver determines the final target gear, at which point the vehicle is directly shifted from the intermediate gear to the final target gear. This eliminates the need to complete the entire shift process and then shift the vehicle from the initial target gear to the final target gear, thus reducing shifting time.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0028] Figure 1 This is a flowchart of a vehicle gear shifting control method provided in one embodiment of this application;

[0029] Figure 2 This is a flowchart of a vehicle gear shifting control method provided in one embodiment of this application;

[0030] Figure 3 This is a flowchart of a vehicle gear shifting control method provided in one embodiment of this application;

[0031] Figure 4 This is a flowchart of a vehicle gear shifting control method provided in one embodiment of this application. Detailed Implementation

[0032] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0033] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to limit the application. Unless otherwise defined, the technical or scientific terms used in this application should be understood in their ordinary sense by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. "A plurality" or "several" indicates at least two. Unless otherwise indicated, the terms "front," "rear," "lower," and / or "upper," etc., are for ease of description only and are not limited to a location or spatial orientation. The terms "comprising" or "including," etc., mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. The terms "connected," "linked," etc., are not limited to physical or mechanical connections and can include electrical connections, whether direct or indirect.

[0034] The singular forms “a,” “the,” and “the” used in this application specification and appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0035] The gear shifting stages of a vehicle include a torque reduction stage, a gear disengagement stage, and a speed adjustment stage. This application provides a vehicle gear shifting control method that can be applied to any of the above gear shifting stages.

[0036] like Figure 1 As shown, the vehicle gear shifting control method provided in this application includes steps 101 to 105:

[0037] Step 101: Obtain the vehicle's initial gear and initial target gear. The initial target gear is the gear the driver initially wants the vehicle to reach.

[0038] Step 102: If the initial target gear is detected to be potentially changing, determine the vehicle's intermediate gear based on the vehicle's current shifting stage.

[0039] Optionally, detecting whether the initial target gear might change includes:

[0040] The system acquires the vehicle's acceleration, the transmission output shaft's rotational speed, and the brake pedal's opening. If the transmission output shaft's rotational speed exceeds a preset speed threshold, the brake pedal's opening exceeds a first preset opening threshold, and the vehicle's acceleration is less than a preset acceleration threshold, the initial target gear may change.

[0041] The preset speed threshold is the rotational speed of the transmission output shaft when the vehicle may brake; the first preset braking angle threshold is the brake pedal opening when the vehicle may brake; and the preset acceleration threshold is the vehicle acceleration when the vehicle may brake. If the transmission output shaft speed is greater than the preset speed threshold, the brake pedal opening is greater than the first preset braking angle threshold, and the vehicle acceleration is less than the preset acceleration angle threshold—that is, if the vehicle simultaneously meets all three conditions—it indicates that the vehicle is braking and its speed is trending downwards. During the process of shifting from the current gear to the initial target gear, if the driver does not intend to change the initial target gear, the vehicle speed should continue to increase. Therefore, if the vehicle speed shows a downward trend, it indicates that the driver may intend to change the initial target gear. Using multiple conditions—vehicle acceleration, transmission output shaft speed, and brake pedal opening—to jointly determine whether the initial target gear may change increases the reliability of the judgment.

[0042] Optionally, the intermediate gear of the vehicle is determined based on the current shift stage of the vehicle, including:

[0043] If the vehicle is currently in a torque reduction or disengagement phase, then the intermediate gear is determined as the vehicle's initial gear.

[0044] Optionally, the intermediate gear of the vehicle is determined based on the current shift stage of the vehicle, including:

[0045] If the vehicle is currently in the speed adjustment phase, then the intermediate gear is determined to be neutral.

[0046] Step 103: Adjust the vehicle's current gear to the middle gear.

[0047] Step 104: Determine the vehicle's final target gear based on the pedal opening. Pedal opening includes either the accelerator pedal opening or the brake pedal opening, and the final target gear is the gear the driver ultimately wants the vehicle to reach.

[0048] Optionally, when the vehicle's current shift phase is a torque reduction phase or a disengagement phase, the final target gear of the vehicle is determined based on the vehicle's pedal opening, including:

[0049] The system acquires the accelerator pedal opening of the vehicle. If the accelerator pedal opening is greater than a preset accelerator threshold, the final target gear is determined to be the initial target gear. If the accelerator pedal opening is less than the preset accelerator threshold, the final target gear is determined to be the intermediate gear.

[0050] Optionally, if the current shift phase of the vehicle is a speed adjustment phase, the final target gear is determined based on the vehicle's pedal opening, including:

[0051] The vehicle's brake pedal opening and optimal gear are obtained. If the brake pedal opening is less than a second preset opening threshold, the final target gear is determined as the optimal gear.

[0052] Step 105: Adjust the vehicle's current gear from the intermediate gear to the final target gear.

[0053] The system detects whether the driver's initial target gear might change during vehicle operation. If the initial target gear might change, the vehicle's current gear is shifted to an intermediate gear. Based on the pedal opening, the final target gear is determined, and the vehicle is shifted from the intermediate gear to the final target gear. By setting an intermediate gear as a transitional gear during gear shifting, the vehicle can first shift to an intermediate gear when the driver frequently changes the target gear, until the driver determines the final target gear, at which point the vehicle is directly shifted from the intermediate gear to the final target gear. This eliminates the need to complete the entire shift process and then shift the vehicle from the initial target gear to the final target gear, thus reducing shifting time.

[0054] Optionally, adjusting the vehicle's current gear from the intermediate gear to the final target gear includes:

[0055] The system obtains the vehicle's transmission output shaft speed and accelerator pedal opening. Based on these parameters, it determines the optimal gear for the vehicle. If the optimal gear matches the target gear, the system shifts the vehicle's current gear from the intermediate gear to the target gear.

[0056] The optimal gear is the gear that the vehicle chooses based on the speed of the transmission output shaft and the accelerator pedal opening at the current stage. The final target gear is the gear that the driver ultimately wants the vehicle to reach. When the optimal gear and the final target gear are the same, the vehicle's current gear is adjusted from the intermediate gear to the final target gear to ensure that the final target gear is the most suitable gear for the vehicle during gear shifting.

[0057] Optionally, the vehicle shifting control method further includes, before detecting a potential change in the initial target gear:

[0058] When the vehicle is currently in a torque-reducing shift phase, obtain the target torque of the vehicle's drive motor. Adjust the current torque of the drive motor to the target torque. During the adjustment process, detect whether the initial target gear may have changed.

[0059] The following description, in conjunction with specific embodiments, illustrates the application of the vehicle shifting control method provided in this application to a situation where the current shifting stage of the vehicle is a torque reduction stage.

[0060] like Figure 2 As shown, the vehicle gear shifting control method includes steps 201 to 209:

[0061] Step 201: Obtain the vehicle's initial gear, initial target gear, and target torque of the drive motor.

[0062] Step 202: Adjust the current torque of the drive motor to the target torque.

[0063] Step 203: During the process of adjusting the current torque of the drive motor to the target torque, detect whether the initial target gear may change.

[0064] Step 204: If the initial target gear is detected to be potentially changing, determine the vehicle's intermediate gear as the vehicle's initial gear.

[0065] Step 205: Adjust the vehicle's current gear to the middle gear.

[0066] Step 206: Obtain the accelerator pedal opening of the vehicle.

[0067] Step 207: If the accelerator pedal opening is greater than the preset accelerator threshold, determine the final target gear as the initial target gear. Proceed to step 209.

[0068] Step 208: If the accelerator pedal opening is less than the preset accelerator threshold, determine the final target gear as the intermediate gear. Proceed to step 209.

[0069] Step 209: Adjust the vehicle's current gear from the intermediate gear to the final target gear.

[0070] For example, the vehicle's initial gear is 2nd gear, and the initial target gear is 3rd gear. During the shift from the initial 2nd gear to the initial target 3rd gear, the vehicle's transmission controller sends a torque request to the motor controller, causing the motor controller to adjust the current torque of the drive motor to the target torque according to the torque request sent by the transmission controller. The target torque of the drive motor is less than the current torque of the drive motor. During the adjustment of the drive motor's current torque to the target torque, it is detected whether the initial target gear may change. If no change is detected, it is determined whether the current torque of the drive motor has decreased to the target torque. If it has decreased to the target torque, the torque reduction phase ends, and the next shift phase, i.e., the disengagement phase, begins. If a change is detected, i.e., if the transmission output shaft speed is 125 rpm, greater than the preset speed threshold of 100 rpm, the brake pedal opening is 25%, greater than the first preset opening threshold of 20%, and the vehicle's acceleration is -2g, less than the preset acceleration threshold of -1g, and the vehicle brakes, it indicates that the driver may intend to change the initial target gear to 3rd gear. The system determines the vehicle's initial gear as 2nd gear, adjusts the current gear to 2nd gear, and responds in real-time to the transmission controller's torque request or the vehicle's energy recovery torque. While in 2nd gear, the system further determines the driver's intended target gear based on the accelerator pedal opening. If the accelerator pedal opening is 15% (greater than the preset throttle threshold of 10%), it indicates the driver is pressing the accelerator while braking, intending to upshift from 2nd gear. In this case, the final target gear is determined to be the initial target gear 3rd gear, and the current gear is adjusted from 2nd to 3rd. If the accelerator pedal opening is 5% (less than the preset throttle threshold of 10%), it indicates the driver does not intend to upshift, and the final target gear is determined to be 2nd gear, maintaining the current gear in 2nd gear.

[0071] By setting a middle gear (2nd gear) as a transitional gear during gear shifts, the vehicle can shift to 2nd gear before the driver changes their initial target gear to 3rd. If the driver determines the final target gear is 2nd, which aligns with the middle gear, the vehicle's current gear remains in 2nd. This eliminates the need to complete the shift process from 2nd to 3rd after the initial target gear changes to 3rd, and then shift the vehicle back to 2nd. This avoids ineffective and continuous gear shifts, thus increasing the lifespan of the transmission. Furthermore, it can analyze the driver's target gear in real-time based on the accelerator pedal opening when the vehicle outputs power (accelerator pedal is pressed) and respond promptly to the driver's intentions, improving drivability.

[0072] Optionally, the vehicle shifting control method further includes, before detecting a potential change in the initial target gear:

[0073] With the vehicle currently in the disengaged gear position, obtain the target position of the shift fork. Adjust the shift fork position to the target position. During the adjustment process, check if the initial target gear may change.

[0074] The following description, in conjunction with specific embodiments, illustrates the application of the vehicle shifting control method provided in this application to the case where the current shifting stage of the vehicle is the disengagement stage.

[0075] like Figure 3 As shown, the vehicle gear shifting control method includes steps 301 to 309:

[0076] Step 301: Obtain the vehicle's initial gear, initial target gear, and target position of the shift fork.

[0077] Step 302: Adjust the position of the shift fork to the target position.

[0078] Step 303: During the process of adjusting the position of the shift fork to the target position, detect whether the initial target gear may change.

[0079] Step 304: If the initial target gear is detected to be potentially changing, determine the vehicle's intermediate gear as the vehicle's initial gear.

[0080] Step 305: Adjust the vehicle's current gear to the middle gear.

[0081] Step 306: Obtain the accelerator pedal opening of the vehicle.

[0082] Step 307: If the accelerator pedal opening is greater than the preset accelerator threshold, determine the final target gear as the initial target gear. Proceed to step 309.

[0083] Step 308: If the accelerator pedal opening is less than the preset accelerator threshold, determine the final target gear as the intermediate gear. Proceed to step 309.

[0084] Step 309: Adjust the vehicle's current gear from the intermediate gear to the final target gear.

[0085] For example, the vehicle's initial gear is 2nd gear, and the initial target gear is 3rd gear. During the shift from the initial 2nd gear to the initial target 3rd gear, the transmission controller controls the shift motor to adjust the voltage, causing the shift fork electrically connected to the shift motor to move to the target position. This causes the engagement sleeve connected to the shift fork to disengage from the gear ring to a preset distance, thus disengaging the gear. During the adjustment of the shift fork position to the target position, it is detected whether the initial target gear may change. If no change is detected, it is determined whether the shift fork has moved to the target position. If it has moved to the target torque, the disengagement phase ends, and the next shift phase, i.e., the speed adjustment phase, begins. If a change is detected—that is, if the transmission output shaft speed is greater than a preset speed threshold, the brake pedal opening is greater than a first preset opening threshold, and the vehicle acceleration is less than a preset acceleration threshold—the vehicle brakes, indicating that the driver may intend to change the initial target gear to 3rd gear. The system determines the vehicle's initial gear as 2nd gear, adjusts the current gear to 2nd gear, and responds in real-time to the transmission controller's torque request or the vehicle's energy recovery torque. While in 2nd gear, the system further determines the driver's intended target gear based on the accelerator pedal opening. If the accelerator pedal opening is greater than a preset threshold, it indicates the driver is pressing the accelerator while braking, intending to upshift from 2nd gear. In this case, the target gear is determined to be the initial target gear 3rd gear, and the current gear is adjusted from 2nd to 3rd. If the accelerator pedal opening is less than a preset threshold, it indicates the driver does not intend to upshift, and the target gear is determined to be 2nd gear, maintaining the current gear at 2nd.

[0086] By setting a neutral gear, the vehicle can shift to the neutral gear when the driver changes the initial target gear. Only after the driver determines the final target gear will the vehicle shift from the neutral gear to the final target gear. This avoids unnecessary and continuous gear shifts while reducing shift time. Furthermore, shifting gears while the vehicle is delivering power (accelerator pedal depressed) increases the success rate of gear shifts and improves drivability.

[0087] Optionally, the vehicle shifting control method further includes, before detecting a potential change in the initial target gear:

[0088] If the vehicle's current shift phase is a speed adjustment phase, obtain the target speed of the vehicle's drive motor. Adjust the drive motor speed to the target speed. During the adjustment process, check whether the initial target gear might change.

[0089] The following description, in conjunction with specific embodiments, illustrates the application of the vehicle shifting control method provided in this application to the case where the current shifting stage of the vehicle is the speed adjustment stage.

[0090] like Figure 4 As shown, the vehicle gear shifting control method includes steps 401 to 408:

[0091] Step 401: Obtain the vehicle's initial gear, initial target gear, and target speed of the drive motor.

[0092] Step 402: Adjust the speed of the drive motor to the target speed.

[0093] Step 403: During the process of adjusting the speed of the drive motor to the target speed, detect whether the initial target gear may change.

[0094] Step 404: If the initial target gear may change, determine that the vehicle's intermediate gear is neutral.

[0095] Step 405: Adjust the vehicle's current gear to the middle gear.

[0096] Step 406: Obtain the vehicle's brake pedal opening and the vehicle's optimal gear.

[0097] Step 407: If the brake pedal opening is less than the second preset opening threshold, determine the final target gear as the optimal gear.

[0098] Step 408: Adjust the vehicle's current gear from the intermediate gear to the final target gear.

[0099] For example, the vehicle's initial gear is 2nd gear, and the initial target gear is 3rd gear. During the shift from the initial 2nd gear to the initial target 3rd gear, the transmission controller calculates the target speed of the drive motor based on the transmission output shaft speed and the gear ratio of the initial target 3rd gear, and sends a target speed request to the motor controller. The motor controller then adjusts the drive motor speed to the target speed according to the request sent by the transmission controller. During the adjustment of the drive motor speed to the target speed, it is checked whether the initial target gear might change. If no change is detected, it is determined whether the drive motor speed has been adjusted to the target speed. If it has, the speed adjustment phase ends, and the vehicle engages gear, completing the shift process. If a change is detected—that is, if the transmission output shaft speed is greater than a preset speed threshold, the brake pedal opening is greater than a first preset opening threshold, and the vehicle acceleration is less than a preset acceleration threshold—the vehicle brakes, indicating that the driver may intend to change the initial target gear to 3rd gear. Since the vehicle is in neutral during the speed adjustment phase, the intermediate gear is determined to be neutral, and the current gear is adjusted to neutral. With the vehicle in neutral, the driver's intended final gear is determined based on the brake pedal opening. If the optimal gear is determined to be 3rd gear based on the transmission output shaft speed and accelerator pedal opening, and the brake pedal opening is detected to be 3%, less than the second preset threshold of 5%, it indicates that the driver released the brake pedal and no longer intended to continue braking, aligning with the optimal 3rd gear. Therefore, the final target gear is determined to be 3rd gear, and the current gear is adjusted from neutral to 3rd gear. If the brake pedal opening is greater than the second preset threshold when the vehicle is in optimal 3rd gear, it indicates that the driver did not intend to shift to 3rd gear by releasing the brake pedal. If the vehicle's optimal gear is 2nd gear, the system continues to check if the brake pedal opening is less than a second preset threshold. If the brake pedal opening is less than the second preset threshold, the final target gear is determined to be the optimal 2nd gear, and the vehicle's current gear is adjusted from neutral to the final target 2nd gear. If the vehicle is in the optimal 2nd gear and the brake pedal opening is greater than the second preset threshold, it indicates that the driver did not intend to adjust the vehicle to the optimal 2nd gear by releasing the brake pedal. If the vehicle's optimal gear is 1st gear, the system continues to check if the brake pedal opening is less than the second preset threshold. If the brake pedal opening is less than the second preset threshold, the final target gear is determined to be the optimal 1st gear, and the vehicle's current gear is adjusted from neutral to the final target 1st gear.

[0100] By setting a neutral gear, the vehicle can shift to the neutral gear when the driver changes the initial target gear. Only after the driver determines the final target gear will the vehicle shift from the neutral gear to the final target gear. This avoids unnecessary and continuous gear shifting, while reducing shift time. Furthermore, shifting from neutral increases the success rate of gear shifts and improves vehicle drivability.

[0101] The vehicle shifting control method provided in this application can be applied to different shifting stages (torque reduction stage, disengagement stage, and speed adjustment stage), that is, the vehicle shifting control method provided in this application can reduce the vehicle shifting time in different shifting stages.

[0102] The foregoing has described specific embodiments of this specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recited in the claims may be performed in a different order than that shown in the embodiments and may still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require the specific or sequential order shown to achieve the desired result. In some embodiments, multitasking and parallel processing are possible or may be advantageous.

[0103] Other embodiments of this specification will readily occur to those skilled in the art upon consideration of the specification and practice of the invention claimed herein. This specification is intended to cover any variations, uses, or adaptations that follow the general principles of this specification and include common knowledge or customary techniques in the art not claimed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this specification are indicated by the following claims.

[0104] It should be understood that this specification is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this specification is limited only by the appended claims.

[0105] The above description is merely a preferred embodiment of this specification and is not intended to limit this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this specification should be included within the scope of protection of this specification.

Claims

1. A method for controlling vehicle gear shifting, characterized in that, include: Obtain the vehicle's initial gear and initial target gear; If a change in the initial target gear is detected, the intermediate gear of the vehicle is determined based on the current gear shifting stage of the vehicle. Detecting whether the initial target gear may change includes: acquiring the vehicle's acceleration, the rotational speed of the transmission output shaft, and the opening of the brake pedal; If the rotational speed of the gearbox output shaft is greater than a preset speed threshold, the opening of the brake pedal is greater than a first preset opening threshold, and the acceleration of the vehicle is less than a preset acceleration threshold, it is determined that the initial target gear may change. Adjust the vehicle's current gear to the intermediate gear; The final target gear of the vehicle is determined based on the pedal opening; wherein the pedal opening includes the accelerator pedal opening or the brake pedal opening. Adjust the vehicle's current gear from the intermediate gear to the final target gear.

2. The control method according to claim 1, characterized in that, Determining the vehicle's intermediate gear based on the vehicle's current shift stage includes: If the current shifting phase of the vehicle is a torque reduction phase or a disengagement phase, then the intermediate gear is determined to be the initial gear of the vehicle.

3. The control method according to claim 2, characterized in that, When the current shift phase of the vehicle is a torque reduction phase or a disengagement phase, determining the final target gear of the vehicle based on the pedal opening includes: Obtain the accelerator pedal opening of the vehicle; If the accelerator pedal opening is greater than a preset accelerator threshold, the final target gear is determined to be the initial target gear. If the accelerator pedal opening is less than the preset accelerator threshold, the final target gear is determined to be the intermediate gear.

4. The control method according to claim 1, characterized in that, Determining the intermediate gear of the vehicle based on its current shifting stage includes: If the current gear shifting phase of the vehicle is the speed adjustment phase, then the intermediate gear is determined to be neutral.

5. The control method according to claim 4, characterized in that, When the current shift phase of the vehicle is a speed adjustment phase, determining the final target gear of the vehicle based on the pedal opening includes: Obtain the brake pedal opening of the vehicle and the optimal gear of the vehicle; If the brake pedal opening is less than a second preset opening threshold, the final target gear is determined to be the optimal gear for the vehicle.

6. The control method according to any one of claims 1-5, characterized in that, Adjusting the vehicle's current gear from the intermediate gear to the final target gear includes: The rotational speed of the vehicle's transmission output shaft and the accelerator pedal opening are obtained. The optimal gear for the vehicle is determined based on the rotational speed of the transmission output shaft and the opening of the accelerator pedal. If the optimal gear and the final target gear are the same, adjust the vehicle's current gear to the final target gear.

7. The control method according to claim 1, characterized in that, Before detecting a possible change in the initial target gear, the control method further includes: When the current shift phase of the vehicle is a torque reduction phase, the target torque of the vehicle's drive motor is obtained. Adjust the torque of the drive motor to the target torque; During the process of adjusting the current torque of the drive motor to the target torque, it is detected whether the initial target gear may change.

8. The control method according to claim 1, characterized in that, Before detecting a possible change in the initial target gear, the control method further includes: If the current shifting phase of the vehicle is the disengagement phase, obtain the target position of the vehicle's shift fork. Adjust the position of the shift fork to the target position; During the process of adjusting the position of the shift fork to the target position, it is detected whether the initial target gear may change.

9. The control method according to claim 1, characterized in that, Before detecting a possible change in the initial target gear, the control method further includes: If the current shift phase of the vehicle is a speed adjustment phase, obtain the target speed of the vehicle's drive motor. Adjust the speed of the drive motor to the target speed; During the process of adjusting the speed of the drive motor to the target speed, it is detected whether the initial target gear may change.

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