Automobile tailgate lock movable cover control method, control device and automobile

Abstract

The application discloses a control method and control device of a movable cover plate of a tailgate lock of a vehicle and the vehicle. During opening or closing of the tailgate, the control device controls the movable cover plate to be closed or opened according to the tailgate position and / or change of the tailgate position, so that the movable cover plate and the tailgate lock are kept in a non-contact state. Thus, the problems of torsional spring attenuation, contact noise and friction marks in the prior art can be solved.

Description

Technical Field

[0001] This application relates to the field of automotive automation, and in particular to a method, control device, and vehicle for controlling the movable cover of a car tailgate lock. Background Technology

[0002] With fierce competition in the automotive market, the demand for refinement is increasing. The exposed latches at the door sill when the tailgate is opened do not meet this requirement. Currently, a removable cover is typically used to conceal the latches, thus satisfying the need for a more refined design.

[0003] However, the following problems were found in the use of the current car tailgate lock movable cover: (1) When the movable cover closes, the cover and the door sill are prone to collision noise; (2) Long-term friction between the tailgate lock and the movable cover will leave scratches on the protective cover on the tailgate lock and the movable cover, affecting the appearance; (3) Collision and friction will also cause the torsion spring used to rotate the cover to wear out. Summary of the Invention

[0004] To address the issues of torsion spring attenuation, abnormal contact noise, and wear marks in existing technologies, this application provides a method, control device, and vehicle for controlling the movable cover of a car tailgate lock.

[0005] In a first aspect, this application provides a method for controlling a movable cover plate of a car tailgate lock. The movable cover plate is used to cover a latch located at the sill after the car tailgate is opened. The method is executed by a control device and includes: controlling the movable cover plate to close or open according to the tailgate position and / or changes in the tailgate position during the opening or closing process, so that the movable cover plate remains in a non-contact state with the tailgate lock.

[0006] In some embodiments, controlling the closing of the movable cover based on the tailgate position and / or changes in the tailgate position includes: when the tailgate moves to a first preset position, starting to control the movable cover to follow the tailgate's movement; and ending the control of the movable cover when it moves to the maximum closed position. During the opening process, the gap between the movable cover and the tailgate lock is maintained within a preset distance range, the preset distance range having a minimum allowable gap as its lower limit, and the first preset position is determined based on the minimum allowable gap.

[0007] In some embodiments, controlling the opening of the movable cover based on the tailgate position and / or changes in the tailgate position includes: when the tailgate begins to move, starting to control the movable cover to follow the tailgate's movement; and ending the control when the movable cover reaches its maximum opening position. During the process of controlling the movable cover to follow the tailgate's movement, the displacement of the movable cover within the same time interval is equal to the tailgate displacement reflecting the change in the tailgate's position.

[0008] In some embodiments, both the movable cover and the tailgate lock rotate around a fixed axis. During the process of controlling the movable cover to follow the tailgate movement, the rotation angle of the movable cover satisfies 2r*sin(ΔY / 2)=2R*sin(ΔX / 2), where r represents the rotation radius of the movable cover, R represents the rotation radius of the tailgate, ΔY represents the rotation angle of the movable cover over a period of time, and ΔX represents the rotation angle of the tailgate over the same period of time.

[0009] In some embodiments, controlling the movable cover to close based on the tailgate position and / or changes in the tailgate position, so that the movable cover and the tailgate lock remain in a non-contact state, includes: controlling the movable cover to close while the tailgate position is within a preset position range, so that the gap between the movable cover and the tailgate lock is maintained within a preset distance range. Controlling the movable cover to open based on the tailgate position and / or changes in the tailgate position, so that the movable cover and the tailgate lock remain in a non-contact state, includes: controlling the movable cover to open while the tailgate position is within the preset position range, so that the gap between the movable cover and the tailgate lock is maintained within a preset distance range. Wherein, the preset position range has a first preset position and a second preset position as endpoints, the first preset position being determined based on the minimum permissible gap between the movable cover and the tailgate lock, and the second preset position being determined based on the minimum tailgate position where the movable cover can be seen when a person is standing facing the tailgate.

[0010] In some embodiments, the tailgate lock rotates about a fixed axis, and the minimum tailgate position satisfies... Wherein, angle X represents the minimum tailgate position, H represents the preset eye height, h represents the threshold height from the ground, D represents the preset horizontal distance between the eye and the threshold, and R represents the tailgate rotation radius.

[0011] In some embodiments, H is 5% of the height of a female human eye, and D is 5% of the horizontal distance between a female human eye and the threshold.

[0012] Secondly, embodiments of this application provide a computer program product that, when run on a computer, causes the computer to execute the control method as described in any one of the first aspects.

[0013] Thirdly, embodiments of this application provide a control device, which includes a processor and a memory. The memory stores a computer program, and when the processor executes the computer program, it implements the control method described in the first aspect.

[0014] Fourthly, embodiments of this application provide an automobile, the automobile including the control device as described in the third aspect.

[0015] Fifthly, embodiments of this application provide a control system for a movable cover plate of a car tailgate lock. The movable cover plate is used to cover a latch located at the sill after the car tailgate is opened. The control system includes a control module, which is used to: control the movable cover plate to close according to the tailgate position and / or changes in the tailgate position during the tailgate opening process, so that the movable cover plate remains in a non-contact state with the tailgate lock; and / or, control the movable cover plate to open according to the tailgate position and / or changes in the tailgate position during the tailgate closing process, so that the movable cover plate remains in a non-contact state with the tailgate lock.

[0016] In this embodiment, by controlling the opening and closing of the movable cover plate according to the tailgate position during the tailgate opening and closing process, the movable cover plate can be kept in a non-contact state with the tailgate lock during the opening and closing process, thereby solving the problems of torsion spring attenuation, abnormal contact noise and wear marks existing in the prior art. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of an exemplary car tailgate (back door) lock and its surrounding structure.

[0018] Figure 2 This is an exemplary flowchart of the method for controlling the movable cover of a car tailgate lock provided in an embodiment of this application.

[0019] Figures 3A to 3C The rotating mechanism of the tailgate (back door) lock and the movable cover is demonstrated.

[0020] Figure 4A This is an exemplary flowchart of the electric tailgate (back door) opening process under the follow-up mode provided in the embodiments of this application.

[0021] Figure 4B This is an exemplary flowchart of the closing process of an electric tailgate (back door) in the follow-up mode provided in the embodiments of this application.

[0022] Figure 5A This is an exemplary flowchart of the electric tailgate (back door) opening process in a non-visual manner provided in the embodiments of this application.

[0023] Figure 5B This is an exemplary flowchart of the closing process of an electric tailgate (back door) in the follow-up mode provided in the embodiments of this application.

[0024] Figure 6 This is a geometric diagram showing the smallest possible tailgate position where the movable cover can be seen when a person is standing facing the tailgate.

[0025] Figure 7 This is a schematic diagram of the structure of the control device provided in the embodiments of this application.

[0026] Figure 8This is a schematic diagram of the structure of the control device provided in the embodiments of this application.

[0027] Figure 9 This is an exemplary block diagram of the control system provided in the embodiments of this application. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be described in detail below with reference to the accompanying drawings.

[0029] The movable cover mentioned in this article is used to conceal the latch located at the door sill when the tailgate is opened. The terms "tailgate" and "rear door" are used interchangeably to refer to the luggage compartment (also called the trunk) door at the rear of the vehicle. The terms "tailgate position" (or "rear door position") and "tailgate opening" (or "rear door opening") are used interchangeably. The terms "open" and "unlocked" are used interchangeably.

[0030] Figure 1 This is a schematic diagram of an exemplary car tailgate (rear door) lock and its surrounding structure. For example... Figure 1 As shown, the tailgate lock is located between the tailgate interior panel and the tailgate welded assembly. When the tailgate is closed (the tailgate lock has entered the sill), the movable cover (the black structure in the diagram) is open. When the tailgate is open (the tailgate lock has left the sill), the movable cover is closed (rising to the position of the dotted line flush with the top of the sill guard). Therefore, during the opening of the tailgate, the movable cover needs to be closed to meet the requirements of refinement, and during the closing of the tailgate, the movable cover needs to be opened so that the tailgate lock can enter the sill.

[0031] Figure 2 This is an exemplary flowchart of a method for controlling the movable cover of a car tailgate lock according to an embodiment of this application. The method can be executed by a control device (e.g., a microcontroller unit) in the car.

[0032] like Figure 2 As shown, the control method for the tailgate opening process includes step 210.

[0033] Step 210: During the tailgate opening process, control the movable cover to close according to the tailgate position and / or changes in the tailgate position, so that the movable cover remains in a non-contact state with the tailgate lock.

[0034] During the tailgate closing process, the control method includes step 220.

[0035] Step 220: During the tailgate closing process, control the movable cover to open according to the tailgate position and / or changes in the tailgate position, so that the movable cover remains in a non-contact state with the tailgate lock.

[0036] Preferably, step 210 can be applied to the tailgate opening process, and step 220 can be applied to the tailgate closing process.

[0037] In this embodiment, by controlling the opening and closing of the movable cover plate according to the tailgate position during the tailgate opening and closing process, the movable cover plate can be kept in a non-contact state with the tailgate lock during the opening and closing process, thereby solving the problems of torsion spring attenuation, abnormal contact noise and wear marks existing in the prior art.

[0038] To control the movement of the tailgate, the control device needs to acquire the tailgate position and / or changes in tailgate position. In some embodiments, after detecting that the tailgate is about to open or is opening, for example, after receiving a tailgate opening command or detecting continuous movement of the tailgate, the control device can continuously acquire (also known as real-time acquisition) the tailgate position at fixed time intervals. The tailgate position can be acquired by sensors (e.g., position sensors, height sensors, etc.) installed inside the tailgate, and accordingly, the control device can read the tailgate position from the sensors in real time. Changes in the tailgate position can be obtained by subtracting the tailgate positions at different points in time.

[0039] In some embodiments, for a tailgate that supports automatic opening and closing (e.g., a power tailgate), the control device can record the tailgate position and / or changes in tailgate position during the control process when controlling the tailgate to open or close. Accordingly, during the process of controlling the tailgate to open or close, the control device can control the movable cover to close or open based on the recorded changes in tailgate position and / or tailgate position.

[0040] It is understood that as long as the tailgate position and / or changes in the tailgate position can be obtained, for example, with the installation of a sensor for detecting the tailgate position, the control method is applicable to both automatic and manual tailgate opening and closing.

[0041] In some embodiments, during the control of the movable cover opening and closing, the gap between the movable cover and the tailgate lock is maintained within a preset distance range, where the preset distance range has a minimum allowable gap as its lower limit. The distance that meets the preset distance range can also be referred to as the safety distance. In practical applications, the minimum allowable gap can be set as needed, for example, referring to... Figure 1 The minimum allowable gap is a millimeters (a is between 1 and 10), and the preset distance range is no more than a millimeters.

[0042] In some embodiments, the control device can control the movable cover to follow the tailgate movement; this control method is referred to as the follow-up method. In the follow-up method, when the tailgate moves (closes) to a first preset position, the control device begins to control the movable cover to follow the tailgate movement. When the movable cover moves to its maximum open position, the control device ends its control. During the opening process, the gap between the movable cover and the tailgate lock remains within the preset distance range. The first preset position is determined based on the minimum allowable gap defined by the preset distance range. For example, the first preset position is the position where the distance from the tailgate to the movable cover is the minimum allowable gap; that is, when the tailgate is closed until the distance from the tailgate lock to the movable cover is exactly equal to the minimum allowable gap (e.g., a mm), the control device begins to control the movable cover to follow the tailgate movement. It is worth noting that, with reference to... Figure 1 Since the movable cover is initially in the closed state (flush with the top of the sill guard) during the tailgate closing process, the first preset position is equivalent to the position where the distance from the tailgate to the sill (e.g., to the top of the sill guard) is the minimum allowable gap.

[0043] Based on the foregoing, in the follow-up mode, when the tailgate is closed (i.e., the movable cover is open), the gap between the movable cover and the tailgate lock is within a preset distance range. Therefore, during the tailgate opening process, when the tailgate begins to move, the control device starts controlling the movable cover to follow the tailgate's movement. At this time, the gap between the movable cover and the tailgate lock is within the preset distance range. When the movable cover moves to its maximum open position, the control device terminates its control. During the process of controlling the movable cover to follow the tailgate's movement, a safe distance must be maintained between the two.

[0044] During the process of controlling the movable cover to follow the tailgate's movement, the displacement of the movable cover within the same time interval is equal to the tailgate's displacement. The tailgate displacement reflects the change in tailgate position and is a quantified value of that change. As mentioned above, the tailgate displacement can be obtained from tailgate control-related records or by subtracting the tailgate positions at different time points. This ensures a safe distance between the movable cover and the tailgate during the follow-up process.

[0045] The following example, which shows that both the movable cover and the tailgate lock rotate around a fixed axis, illustrates the relationship between the displacement of the movable cover and the displacement of the tailgate.

[0046] Figures 3A to 3C The tailgate (rear door) lock and the rotating mechanism of the sliding cover are demonstrated. (Reference) Figure 3A Since the rear door lock is located on the rear door, the rotation axis of the rear door is also the rotation axis of the rear door lock. The rotation axis of the rear door can be located at the top of the rear door. (Reference) Figure 3B The pivot point of the movable cover can be located near the threshold. (Refer to reference) Figure 3C and Figure 1The control device can control the rotation angle ΔY of the movable cover and the rotation angle ΔX of the back door (lock) within the same time period to satisfy 2r*sin(ΔY / 2)=2R*sin(ΔX / 2). Both sides of the equation represent the displacement of the movable cover 2r*sin(ΔY / 2) and the displacement of the back door 2R*sin(ΔX / 2) within the same time period, where r represents the rotation radius of the movable cover and R represents the rotation radius of the back door. Correspondingly, the maximum displacement of the movable cover during rotation, 2r*sin(Y / 2), is equal to the maximum displacement of the back door during the same process, 2R*sin(X / 2).

[0047] The following describes the specific implementation of the follow-up method using electric drive as an example.

[0048] Figure 4A This is an exemplary flowchart of the electric tailgate (back door) opening process under the follow-up mode provided in the embodiments of this application. As shown in FIG4, the tailgate opening process 410 includes steps 411 to 416.

[0049] Step 411: The rear door opening switch is triggered.

[0050] The switch here can be a physical switch (e.g., a tailgate button) or a virtual switch (e.g., a voice-controlled variable). Drivers and passengers can trigger the tailgate opening in any feasible manner.

[0051] Step 412: The rear door controller drives the rear door lock motor to unlock.

[0052] A tailgate controller refers to a device used to control the opening and closing of a tailgate, and it is also used to control the opening and closing of a movable cover. It can be understood that the tailgate controller can be considered as a control device or part of the control method described above. A tailgate lock motor is used to provide the power required for locking / unlocking the tailgate.

[0053] Step 413: The tailgate controller drives the electric support rod to open the tailgate.

[0054] The electric support rod is connected to the back door and is used to support and move the back door.

[0055] Step 414: The rear door controller drives the sill motor to close the movable cover.

[0056] The sill motor provides the power needed to open and close the movable cover.

[0057] During the opening of the tailgate, when the tailgate begins to move, the tailgate controller sends a closing command to the sill motor, causing the sill motor to drive the movable cover to close.

[0058] Step 415: The movable cover is closed to its maximum position and then stopped. During the follow-up process, a safe distance is maintained between the movable cover and the rear door lock.

[0059] The maximum position refers to the position of the movable cover (or back door) when it is in the open (or closed) state.

[0060] The sill motor drives the movable cover to its maximum position (i.e., the movable cover is closed), and sends feedback to the tailgate controller. After receiving the feedback that the movable cover is closed, the tailgate controller sends a stop signal to the sill motor.

[0061] Step 416: Continue to open the back door to its maximum position.

[0062] After the cover is closed, the tailgate continues to open until it is open, at which point the tailgate opening process is complete.

[0063] Figure 4B This is an exemplary flowchart illustrating the closing process of an electric tailgate (back door) in a follow-up mode, as provided in the embodiments of this application. Figure 4B As shown, the tailgate closing process 420 includes steps 421 to 425.

[0064] Step 421, the rear door closing switch is triggered.

[0065] The switch here can be a physical switch (e.g., a tailgate button) or a virtual switch (e.g., a voice-controlled variable). Drivers and passengers can trigger the tailgate to close using any feasible method.

[0066] Step 422: The tailgate controller drives the electric strut to close the tailgate.

[0067] Step 423: In response to the tailgate moving to the first preset position, the tailgate controller drives the sill motor to open the movable cover.

[0068] During the closing process of the tailgate, the tailgate controller reads the tailgate position in real time and, in response to the set trigger conditions (for example, the distance between the tailgate lock and the movable cover is exactly the minimum allowable gap), sends a movable cover opening command to the sill motor, causing the sill motor to start driving the movable cover to open.

[0069] Step 424: Close the rear door to the maximum position, and the movable cover will follow by opening to the maximum position, maintaining a safe distance between the movable cover and the rear door lock during the follow-up process.

[0070] The sill motor drives the movable cover to its maximum position (i.e., the movable cover is open), and sends feedback to the tailgate controller. After receiving the feedback that the movable cover is open, the tailgate controller sends a stop signal to the sill motor.

[0071] Step 425: The rear door controller drives the rear door lock motor to lock.

[0072] Locking means that the back door is locked, and the back door closing process is now complete.

[0073] During the opening / closing of the tailgate, there is a period when the tailgate is not visible. During this period, a person standing facing the tailgate cannot see the movable cover located at the threshold. In some embodiments, the control device can control the opening and closing of the movable cover during this period of tailgate obscurity; this control method is referred to as the "obscurity method." This further satisfies users' requirements for refinement. Specifically, the period of tailgate obscurity corresponds to a tailgate position range, also known as the tailgate opening range, which can be preset. The control device can control the movable cover to close or open while the tailgate is within the preset position range. That is, the initial and final moments of the movable cover's movement both fall within the period of tailgate obscurity.

[0074] The preset position range is defined by a first preset position and a second preset position as endpoints. The first preset position is determined based on the minimum allowable gap between the movable cover and the tailgate lock. Referring to the foregoing, the first preset position can be the tailgate position where the distance between the movable cover and the tailgate lock is exactly the minimum allowable gap. The second preset position is determined based on the minimum tailgate position where the movable cover can be seen when a person is standing facing the tailgate. It can be understood that when a person is standing facing the tailgate, and the tailgate is opened to a certain extent, i.e., the tailgate opening angle (the angle of upward opening) exceeds a certain threshold, the movable cover located at the threshold can be seen. This threshold is the minimum tailgate position, also known as the minimum tailgate opening angle.

[0075] The following describes the specific implementation of the invisible method using electric drive as an example.

[0076] Figure 5A This is an exemplary flowchart illustrating the process of opening an electric tailgate (back door) in a non-visual manner, as provided in the embodiments of this application. Figure 5A As shown, the rear door opening process 510 includes steps 511 to 515.

[0077] Step 511: The rear door opening switch is triggered.

[0078] Step 512: The rear door controller drives the rear door lock motor to unlock.

[0079] Step 513: The tailgate controller drives the electric support rod to open the tailgate.

[0080] Step 514: While the tailgate is within a preset position range, the tailgate controller drives the sill motor to close to the maximum position.

[0081] For example, at any time during the period when the tailgate is not visible, the tailgate controller drives the sill motor to close rapidly to the maximum position. Rapid closing can mean that the sill motor rotates at a relatively high operating speed (e.g., the maximum operating speed) to ensure that the initial and final moments of the closing process of the movable cover are both during the period when the tailgate is not visible.

[0082] Step 515: Continue opening the rear door to its maximum position.

[0083] For more details regarding the rear door opening process 510 and its steps, please refer to [link / reference]. Figure 4A And its related descriptions.

[0084] Figure 5B This is an exemplary flowchart illustrating the closing process of an electric tailgate (back door) in a follow-up mode, as provided in the embodiments of this application. Figure 5B As shown, the tailgate closing process 520 includes steps 521 to 525.

[0085] Step 521, the rear door closing switch is triggered.

[0086] Step 522: The tailgate controller drives the electric strut to close the tailgate.

[0087] Step 523: While the tailgate is within a preset position range, the tailgate controller drives the sill motor to open to the maximum position.

[0088] For example, at any time during the period when the tailgate is not visible, the tailgate controller can drive the sill motor to open rapidly to the maximum position and close rapidly by rotating the sill motor at a higher operating speed (e.g., the maximum operating speed) to ensure that the initial and final moments of the closing process of the movable cover are both during the period when the tailgate is not visible.

[0089] Step 524: Continue closing the rear door to its maximum position.

[0090] Step 525: The rear door controller drives the rear door lock motor to lock.

[0091] For more details on the rear door closing process 520 and its steps, please refer to [link / reference]. Figure 4B And its related descriptions.

[0092] In some embodiments, reference Figure 6 With the tailgate lock rotating around a fixed axis, the minimum tailgate position satisfies In this diagram, angle X represents the minimum tailgate position, H represents the preset eye height, h represents the threshold height from the ground (e.g., the top of the threshold guard plate), D represents the preset horizontal distance between the eye and the threshold (e.g., the top of the threshold guard plate), and R represents the tailgate turning radius. To meet the needs of most people, H can be set to the eye height of the 5th percentile of women, and D can be set to the horizontal distance between the eye and the threshold of the 5th percentile of women. The percentile mentioned here is anthropometric terminology; 5% refers to the 5th percentile. 5% of women refers to women with smaller stature (e.g., height), who can be considered the smallest group. For example, the 5th percentile of women's eye height (H) means that statistical results show that women with an eye height less than or equal to this specific height (H) account for 5% of the total population, meaning that 95% of women have an eye height greater than this specific height (H).

[0093] It should be noted that the above description of the process is for illustrative purposes only and does not limit the scope of this application. Those skilled in the art can make various modifications and changes to the process under the guidance of this application.

[0094] This application also provides a control device. For example... Figure 7 As shown, the control device 700 includes a processor 710 and a memory 720. The memory 720 stores a computer program. When the processor 710 executes the computer program, it implements the vehicle tailgate lock movable cover control method provided in this application embodiment.

[0095] This application also provides an embodiment of a vehicle. For example... Figure 8 As shown, the car 800 includes a control device 700.

[0096] This application provides a control system for a movable cover plate of a car tailgate lock, wherein the movable cover plate is used to cover the latch located at the door sill after the car tailgate is opened. In some embodiments, the system... Figure 7 This is implemented on the control device 700 shown. For example... Figure 9 As shown, the control system 900 includes a control module 910, which is used to: during the tailgate opening process, control the movable cover to close according to the tailgate position and / or the change in tailgate position, so that the movable cover remains in a non-contact state with the tailgate lock; and / or, during the tailgate closing process, control the movable cover to open according to the tailgate position and / or the change in tailgate position, so that the movable cover remains in a non-contact state with the tailgate lock.

[0097] This application also provides a computer program product that, when run on a computer, causes the computer to execute the vehicle tailgate lock movable cover control method provided in this application.

[0098] More details about the control method and its steps can be found on [website / platform name]. Figure 2 The relevant descriptions can be found here, so I will not repeat them here.

[0099] Unless otherwise defined, the terms used herein should have the ordinary meaning as understood by those skilled in the art. Unless otherwise specified, the terms "first," "second," "third," and similar words used herein do not indicate any order, quantity, or importance, but are merely used to distinguish different entities. The terms "comprising," "including," or any variations thereof are intended to cover non-exclusive inclusion, such that a process, method, product, or apparatus that comprises a list of elements may include not only the elements expressly listed, but also other elements not expressly listed, such as elements inherent to such process, method, product, or apparatus.

[0100] Finally, it should be noted that the above embodiments are only some embodiments of this application and not all embodiments; in the various embodiments of this application, unless otherwise specified or logically conflicting, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship; although the technical solutions of this application have been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features, and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of this application.

Claims

1. A method for controlling a movable cover plate of a car tailgate lock, wherein the movable cover plate is used to cover a latch located at the door sill after the car tailgate is opened, characterized in that... The method is performed by a control device, and the method includes: During the tailgate opening process, based on the tailgate position and / or changes in the tailgate position, the movable cover is controlled to close, so that the movable cover remains in a non-contact state with the tailgate lock; and / or, During the tailgate closing process, the movable cover is controlled to open according to the tailgate position and / or changes in the tailgate position, so that the movable cover remains in a non-contact state with the tailgate lock; The step of controlling the movable cover to close based on the tailgate position and / or changes in the tailgate position, so as to keep the movable cover in a non-contact state with the tailgate lock, includes: While the tailgate is in a preset position range, the movable cover is controlled to close so that the gap between the movable cover and the tailgate lock is maintained within a preset distance range. The step of controlling the opening of the movable cover based on the tailgate position and / or changes in the tailgate position, so as to keep the movable cover in a non-contact state with the tailgate lock, includes: While the tailgate is within the preset position range, the movable cover is controlled to open so that the gap between the movable cover and the tailgate lock is maintained within a preset distance range. The preset position range is defined with a first preset position and a second preset position as endpoints. The first preset position is determined based on the minimum allowable gap between the movable cover and the tailgate lock, and the second preset position is determined based on the minimum tailgate position where the movable cover can be seen when a person is standing facing the tailgate.

2. The method as described in claim 1, characterized in that, The step of controlling the closing of the movable cover based on the tailgate position and / or changes in the tailgate position includes: when the tailgate moves to a first preset position, starting to control the movable cover to follow the tailgate movement; and ending the control of the movable cover when it moves to the maximum closed position. During the opening process, the gap between the movable cover and the tailgate lock is maintained within a preset distance range, with the minimum allowable gap as the lower limit, and the first preset position is determined according to the minimum allowable gap.

3. The method as described in claim 2, characterized in that, The step of controlling the opening of the movable cover based on the tailgate position and / or changes in the tailgate position includes: when the tailgate starts to move, starting to control the movable cover to follow the tailgate's movement; and ending the control of the movable cover when it moves to the maximum opening position. During the process of controlling the movable cover to follow the tailgate movement, the displacement of the movable cover within the same time period is equal to the tailgate displacement used to reflect the change in tailgate position.

4. The method as described in claim 3, characterized in that, Both the movable cover and the tailgate lock rotate around a fixed axis. During the process of controlling the movable cover to follow the tailgate movement, the rotation angle of the movable cover satisfies 2r*sin(ΔY / 2)=2R*sin(ΔX / 2), where r represents the rotation radius of the movable cover, R represents the rotation radius of the tailgate, ΔY represents the rotation angle of the movable cover over a period of time, and ΔX represents the rotation angle of the tailgate over the same period of time.

5. The method as described in claim 1, characterized in that, The tailgate lock rotates around a fixed axis, and the minimum tailgate position satisfies the following conditions: Wherein, angle X represents the minimum tailgate position, H represents the preset eye height, h represents the threshold height from the ground, D represents the preset horizontal distance between the eye and the threshold, and R represents the tailgate rotation radius.

6. The method as described in claim 5, characterized in that, H is based on 5% of the height of a female human eye, and D is based on 5% of the horizontal distance between a female human eye and the threshold.

7. A control device, characterized in that, It includes a processor and a memory, wherein the memory stores a computer program, and when the processor executes the computer program, it implements the control method as described in any one of claims 1 to 6.

8. A car, characterized in that, Includes the control device as described in claim 7.

9. A control system for a movable cover plate of a car tailgate lock, wherein the movable cover plate is used to cover the latch located at the sill after the car tailgate is opened, characterized in that, The control system includes a control module, which is used for: During the tailgate opening process, based on the tailgate position and / or changes in the tailgate position, the movable cover is controlled to close, so that the movable cover remains in a non-contact state with the tailgate lock; and / or, During the tailgate closing process, the movable cover is controlled to open according to the tailgate position and / or changes in the tailgate position, so that the movable cover remains in a non-contact state with the tailgate lock; The step of controlling the movable cover to close based on the tailgate position and / or changes in the tailgate position, so as to keep the movable cover in a non-contact state with the tailgate lock, includes: While the tailgate is in a preset position range, the movable cover is controlled to close so that the gap between the movable cover and the tailgate lock is maintained within a preset distance range. The step of controlling the opening of the movable cover based on the tailgate position and / or changes in the tailgate position, so as to keep the movable cover in a non-contact state with the tailgate lock, includes: While the tailgate is within the preset position range, the movable cover is controlled to open so that the gap between the movable cover and the tailgate lock is maintained within a preset distance range. The preset position range is defined with a first preset position and a second preset position as endpoints. The first preset position is determined based on the minimum allowable gap between the movable cover and the tailgate lock, and the second preset position is determined based on the minimum tailgate position where the movable cover can be seen when a person is standing facing the tailgate.

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