Automatic parking method and device

Abstract

The application relates to an automatic parking method and device, and belongs to the technical field of vehicles. The method is applied to a vehicle provided with a two-gear automatic transmission. The method comprises the following steps: collecting first working condition data of the vehicle under the condition that an automatic parking switch of the vehicle is in an open state, and judging whether the first working condition data meets a preset automatic parking condition; if the first working condition data meets the preset automatic parking condition, controlling a one-gear multi-plate wet clutch and a two-gear multi-plate wet clutch in the two-gear automatic transmission to be locked at the same time; the gear set speed ratio of the one-gear multi-plate wet clutch is different from the gear set speed ratio of the two-gear multi-plate wet clutch, the one-gear multi-plate wet clutch and the two-gear multi-plate wet clutch are interlocked after being locked at the same time, automatic parking is realized, an automatic parking mark is displayed in a vehicle instrument, and the automatic parking mark is used for prompting a user that the vehicle is in an automatic parking state. The application can reduce the abrasion of friction plates and brake discs.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an automatic parking method and device. Background Technology

[0002] Currently, vehicles without EPB (Electrical Park Brake) require drivers to frequently apply and release the brake or handbrake in stop-and-go scenarios such as traffic lights or congestion, resulting in a poor driving experience. Therefore, the Electronic Parking Assist System (AUTOHOLD), which addresses this issue using EPB technology, is widely used in the market. This system effectively assists drivers in applying the parking brake, preventing the vehicle from rolling backwards.

[0003] However, when starting from a parked position, the existing electronic parking assist system requires the drive system to overcome the clamping torque of the parking caliper before it releases, which accelerates the wear of the friction pads and brake discs. Summary of the Invention

[0004] Therefore, it is necessary to provide an automatic parking method and device to address the aforementioned technical problems.

[0005] In a first aspect, an automatic parking method is provided, the method being applied to a vehicle equipped with a two-speed automatic transmission, the method comprising:

[0006] With the vehicle's automatic parking switch in the on state, the first operating condition data of the vehicle is collected, and it is determined whether the first operating condition data meets the preset automatic parking conditions.

[0007] If the first operating condition data meets the preset automatic parking conditions, then the first gear multi-plate wet clutch and the second gear multi-plate wet clutch in the two-speed automatic transmission are locked simultaneously. The gear ratio of the first gear multi-plate wet clutch is different from that of the second gear multi-plate wet clutch. After being locked simultaneously, the first gear multi-plate wet clutch and the second gear multi-plate wet clutch form an interlock to achieve automatic parking.

[0008] The vehicle's instrument panel displays an automatic parking indicator; this indicator serves to alert the user that the vehicle is in automatic parking mode.

[0009] As an optional implementation, the first operating condition data includes vehicle gear position, motor speed, vehicle speed, brake pedal opening, brake pedal duration, and accelerator pedal opening; the step of determining whether the first operating condition data meets the preset automatic parking conditions includes:

[0010] If the vehicle is in drive, and the motor speed is less than or equal to a preset motor speed threshold, the vehicle speed is less than or equal to a preset vehicle speed threshold, the brake pedal opening is greater than or equal to a preset brake pedal opening threshold, the brake pedal depress duration is greater than or equal to a first depress duration threshold, and the accelerator pedal opening is less than or equal to a first accelerator pedal opening threshold, then the first operating condition data is determined to meet the preset automatic parking conditions; otherwise, the first operating condition data is determined not to meet the preset automatic parking conditions.

[0011] As an optional implementation, the motor speed threshold is 20 rpm, the vehicle speed threshold is 3 km / h, the brake pedal opening threshold is 30%, the first pedal duration threshold is 500 ms, and the first accelerator pedal opening threshold is 0.

[0012] As an optional implementation, the method further includes:

[0013] After the vehicle automatically parks, the second operating condition data of the vehicle is collected, and it is determined whether the second operating condition data meets the preset parking start conditions.

[0014] If the second operating condition data meets the preset parking and starting conditions, then control the two-speed automatic transmission to maintain the first gear multi-plate wet clutch lock and release the second gear multi-plate wet clutch lock.

[0015] The automatic parking indicator is removed from the vehicle's instrument panel.

[0016] As an optional implementation, the second operating condition data includes the accelerator pedal opening and the accelerator pedal depressing duration; the step of determining whether the second operating condition data meets the preset parking and starting conditions includes:

[0017] If the accelerator pedal opening is greater than or equal to a preset second accelerator pedal opening threshold, and the accelerator pedal depressing duration is greater than or equal to a preset second depressing duration threshold, then the second operating condition data is determined to meet the preset parking and starting conditions; otherwise, the second operating condition data is determined not to meet the preset parking and starting conditions.

[0018] As an optional implementation, the second accelerator pedal opening threshold is 10%, and the second pedal duration threshold is 200ms.

[0019] Secondly, an automatic parking device is provided, the device being applied to a vehicle equipped with a two-speed automatic transmission, the device comprising:

[0020] The first judgment module is used to collect the first operating condition data of the vehicle when the automatic parking switch of the vehicle is in the on state, and to determine whether the first operating condition data meets the preset automatic parking conditions.

[0021] The first control module is used to control the first gear multi-plate wet clutch and the second gear multi-plate wet clutch in the two-speed automatic transmission to lock simultaneously if the first working condition data meets the preset automatic parking conditions; the gear ratio of the first gear multi-plate wet clutch is different from that of the second gear multi-plate wet clutch, and after being locked simultaneously, the first gear multi-plate wet clutch and the second gear multi-plate wet clutch form an interlock to realize automatic parking.

[0022] The first display module is used to display an automatic parking indicator on the vehicle's instrument panel; the automatic parking indicator is used to remind the user that the vehicle is in automatic parking mode.

[0023] As an optional implementation, the first operating condition data includes vehicle gear position, motor speed, vehicle speed, brake pedal opening, brake pedal depress duration, and accelerator pedal opening; the first judgment module is specifically used for:

[0024] If the vehicle is in drive, and the motor speed is less than or equal to a preset motor speed threshold, the vehicle speed is less than or equal to a preset vehicle speed threshold, the brake pedal opening is greater than or equal to a preset brake pedal opening threshold, the brake pedal depress duration is greater than or equal to a first depress duration threshold, and the accelerator pedal opening is less than or equal to a first accelerator pedal opening threshold, then the first operating condition data is determined to meet the preset automatic parking conditions; otherwise, the first operating condition data is determined not to meet the preset automatic parking conditions.

[0025] As an optional implementation, the motor speed threshold is 20 rpm, the vehicle speed threshold is 3 km / h, the brake pedal opening threshold is 30%, the first pedal duration threshold is 500 ms, and the first accelerator pedal opening threshold is 0.

[0026] As an optional implementation, the device further includes:

[0027] The second judgment module is used to collect the second operating condition data of the vehicle after the vehicle automatically parks, and to determine whether the second operating condition data meets the preset parking start conditions.

[0028] The second control module is used to control the two-speed automatic transmission to maintain the first-speed multi-plate wet clutch lock-up and release the second-speed multi-plate wet clutch lock-up if the second operating condition data meets the preset parking start conditions.

[0029] The second display module is used to cancel the display of the automatic parking indicator in the vehicle's instrument panel.

[0030] As an optional implementation, the second operating condition data includes the accelerator pedal opening and the accelerator pedal depressing duration; the second judgment module is specifically used for:

[0031] If the accelerator pedal opening is greater than or equal to a preset second accelerator pedal opening threshold, and the accelerator pedal depressing duration is greater than or equal to a preset second depressing duration threshold, then the second operating condition data is determined to meet the preset parking and starting conditions; otherwise, the second operating condition data is determined not to meet the preset parking and starting conditions.

[0032] As an optional implementation, the second accelerator pedal opening threshold is 10%, and the second pedal duration threshold is 200ms.

[0033] This application provides an automatic parking method and apparatus. The technical solution provided by the embodiments of this application brings at least the following beneficial effects: The method is applied to a vehicle equipped with a two-speed automatic transmission. When the automatic parking switch of the vehicle is in the on state, the vehicle collects first operating condition data of the vehicle and determines whether the first operating condition data meets the preset automatic parking conditions. Then, if the first operating condition data meets the preset automatic parking conditions, the vehicle controls the first gear multi-plate wet clutch and the second gear multi-plate wet clutch in the two-speed automatic transmission to lock simultaneously, and displays an automatic parking indicator on the vehicle instrument panel. The automatic parking indicator is used to remind the user that the vehicle is in automatic parking mode. In this way, since the gear ratio of the first gear multi-plate wet clutch is different from that of the second gear multi-plate wet clutch, the first gear multi-plate wet clutch and the second gear multi-plate wet clutch interlock after being locked simultaneously, thus realizing automatic parking. Subsequently, when the vehicle starts, it is only necessary to release the lock of the second gear multi-plate wet clutch to start, thereby reducing the wear of friction plates and brake discs.

[0034] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 A schematic diagram of the structure of a conventional electronically assisted parking system provided in this application embodiment;

[0037] Figure 2 A schematic diagram of a powertrain system employing a two-speed automatic transmission is provided for an embodiment of this application;

[0038] Figure 3 This is a schematic diagram of the structure of a two-speed automatic transmission provided in an embodiment of this application;

[0039] Figure 4 A flowchart of an automatic parking method provided in an embodiment of this application;

[0040] Figure 5 A flowchart illustrating an example of an automatic parking method provided in this application embodiment;

[0041] Figure 6 This is a schematic diagram of an automatic parking device provided in an embodiment of this application.

[0042] Attached icon number

[0043] 210. Chassis; 220. Motor; 230. Two-speed automatic transmission; 240. Driveshaft assembly; 250. Rear axle; 260. Wheel; 310. Motor shaft; 320. Input shaft of two-speed automatic transmission; 330. First-speed multi-plate wet clutch; 340. Second-speed multi-plate wet clutch; 331. First-speed gear set; 341. Second-speed gear set; 350. Output shaft of two-speed automatic transmission. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0045] Figure 1 This is a schematic diagram of a conventional electronically assisted parking system provided as an embodiment of this application. Figure 1As shown, existing electronic parking assist systems on the market typically include an EPB switch, an EPB controller, an instrument panel display module, an AUTOHOLD switch, an EPB left rear brake caliper, and an EPB right rear brake caliper. When the vehicle's AUTOHOLD switch is turned on, the AUTOHOLD function is activated. When the driver engages automatic parking, the parking switch in the EPB switch closes, and the EPB controller controls the EPB left and right rear brake calipers to brake the brake pads and discs, thus achieving automatic parking. The EPB controller then displays the automatic parking indicator on the instrument panel display module. When the driver starts moving, the release switch in the EPB switch closes, the parking switch opens, and the EPB controller controls the EPB left and right rear brake calipers to release the brake pads and discs, thus enabling movement. The EPB controller then de-displays the automatic parking indicator on the instrument panel display module.

[0046] However, existing electronic parking assist systems have the following problems during use: (1) When starting from parking, the drive system needs to overcome the clamping torque before the parking caliper releases, which accelerates the wear of the friction pads and brake discs. (2) If the vehicle suddenly loses power after parking, the brakes will not be released and the vehicle cannot be moved; it can only be towed. (3) If there is a communication conflict in the system after parking, the brakes will not be released, and it can only be towed. (4) For electric or hybrid vehicles, it is necessary to add components such as the motor and controller required for electronic braking, which increases the overall vehicle cost.

[0047] The automatic parking method provided in this application can be applied to vehicles equipped with a two-speed automatic transmission. Specifically, the vehicle can be an electric vehicle or a hybrid vehicle. Figure 2 This is a schematic diagram of a powertrain system employing a two-speed automatic transmission, provided as an embodiment of this application. Figure 2 As shown, on the vehicle frame 210, the motor 220 is connected to the two-speed automatic transmission 230, which is connected to the rear axle 250 via a driveshaft assembly 240. The rear axle 250 is connected to the vehicle wheels 260. Furthermore, Figure 3 This is a schematic diagram of a two-speed automatic transmission provided in an embodiment of this application. Figure 3As shown, the motor shaft 310 of the electric motor is connected to the input shaft 320 of the two-speed automatic transmission. A first-gear multi-plate wet clutch 330 and a second-gear multi-plate wet clutch 340 are mounted on the input shaft 320. The first-gear multi-plate wet clutch 330 and the second-gear multi-plate wet clutch 340 are connected to the output shaft 350 of the two-speed automatic transmission via first-gear gear set 331 and second-gear gear set 341, respectively. When the first-gear multi-plate wet clutch 330 is locked, the first-gear gear set 331 transmits the torque of the electric motor. When the second-gear multi-plate wet clutch 340 is locked, the second-gear gear set 341 transmits the torque of the electric motor. The gear ratios of the first-gear multi-plate wet clutch 330 and the second-gear multi-plate wet clutch 340 are different. Therefore, by controlling the locking of the first-gear multi-plate wet clutch 330 and the second-gear multi-plate wet clutch 340, the rotational speed of the output shaft 350 of the two-speed automatic transmission can be adjusted.

[0048] For example, the gear ratio of the first-gear multi-plate wet clutch 330 is R1, the gear ratio of the second-gear multi-plate wet clutch 340 is R2, the input shaft 320 of the two-speed automatic transmission rotates at a speed of N1, and the output shaft 350 rotates at a speed of N2. When the first-gear multi-plate wet clutch 330 is locked, the output shaft 350 of the two-speed automatic transmission rotates at a speed of N2 = N1 / R1 (Formula 1). When the second-gear multi-plate wet clutch 340 is locked, the output shaft 350 of the two-speed automatic transmission rotates at a speed of N2 = N1 / R2 (Formula 2).

[0049] The automatic parking method provided in this application will now be described in detail with reference to specific implementation methods. Figure 4 A flowchart of an automatic parking method provided in this application embodiment is shown below. Figure 4 As shown, the specific steps are as follows:

[0050] Step 401: With the vehicle's automatic parking switch in the on state, collect the vehicle's first operating condition data and determine whether the first operating condition data meets the preset automatic parking conditions.

[0051] In implementation, if the driver needs to use the automatic parking function, the automatic parking switch must be turned on in the vehicle; otherwise, the vehicle cannot perform the automatic parking function. To enable the automatic parking function, with the automatic parking switch on, the vehicle needs to collect first-condition data in real time and determine whether the first-condition data meets the preset automatic parking conditions. If the first-condition data meets the preset automatic parking conditions, the vehicle proceeds to step 402. If the first-condition data does not meet the preset automatic parking conditions, the vehicle does not need to perform any action.

[0052] It should be noted that after the vehicle's automatic parking switch is turned on, the vehicle can display "AUTOHOLD function activated" on the vehicle's instrument panel to indicate to the user that the automatic parking function has been activated.

[0053] Step 402: If the first operating condition data meets the preset automatic parking conditions, then the first-gear multi-plate wet clutch and the second-gear multi-plate wet clutch in the two-speed automatic transmission are simultaneously locked. The gear ratio of the first-gear multi-plate wet clutch is different from that of the second-gear multi-plate wet clutch. After simultaneous locking, the first-gear multi-plate wet clutch and the second-gear multi-plate wet clutch interlock, achieving automatic parking.

[0054] In practice, typically, only one of the first and second gear multi-plate wet clutches can be locked during vehicle operation (both are in a slipping state during gear shifting). Simultaneous locking of the first and second gear multi-plate wet clutches is only possible when the vehicle is stationary or traveling at low speed. If the first operating condition data meets the preset automatic parking conditions, the vehicle needs to perform an automatic parking action. At this time, the vehicle controls the simultaneous locking of both the first and second gear multi-plate wet clutches in the two-speed automatic transmission. Because the gear ratios of the first and second gear multi-plate wet clutches are different, their simultaneous locking creates an interlock, thus achieving automatic parking. For example, the gear ratio of the first-gear multi-plate wet clutch is R1, the gear ratio of the second-gear multi-plate wet clutch is R2, the input shaft speed of the two-speed automatic transmission is N1, and the output shaft speed is N2. When the first-gear multi-plate wet clutch is locked, the output shaft speed of the two-speed automatic transmission is N2 = N1 / R1 (Formula 1). When the second-gear multi-plate wet clutch is locked, the output shaft speed of the two-speed automatic transmission is N2 = N1 / R2 (Formula 2). When both the first-gear and second-gear multi-plate wet clutches are locked simultaneously, Formula 1 and Formula 2 are combined. Since R1 ≠ R2, N1 = N2 = 0, thus achieving self-locking of the transmission system.

[0055] Step 403: Display the Auto Hold indicator on the vehicle's instrument panel. The Auto Hold indicator is used to notify the user that the vehicle is in Auto Hold mode.

[0056] In practice, after the vehicle automatically parks, an automatic parking indicator can be displayed on the vehicle's instrument panel. This indicator serves to notify the user that the vehicle is in automatic parking mode. Optionally, the automatic parking indicator can be represented by the letter "A".

[0057] As an optional implementation, the first operating condition data includes vehicle gear position, motor speed, vehicle speed, brake pedal opening, brake pedal depress duration, and accelerator pedal opening. The vehicle determines whether the first operating condition data meets the preset automatic parking conditions as follows: if the vehicle gear is forward, and the motor speed is less than or equal to a preset motor speed threshold, and the vehicle speed is less than or equal to a preset vehicle speed threshold, and the brake pedal opening is greater than or equal to a preset brake pedal opening threshold, and the brake pedal depress duration is greater than or equal to a first depress duration threshold, and the accelerator pedal opening is less than or equal to a first accelerator pedal opening threshold, then the first operating condition data is determined to meet the preset automatic parking conditions; otherwise, the first operating condition data is determined not to meet the preset automatic parking conditions. Optionally, the motor speed threshold is 20 rpm, the vehicle speed threshold is 3 km / h, the brake pedal opening threshold is 30%, the first depress duration threshold is 500 ms, and the first accelerator pedal opening threshold is 0. In this way, selecting multiple dimensions of first-condition data can more accurately determine whether the vehicle meets the conditions for braking and parking, preventing the vehicle from locking up the first and second gear multi-plate wet clutches of the two-speed automatic transmission simultaneously under non-braking and parking conditions, which could lead to damage to the two-speed automatic transmission.

[0058] As an optional implementation, after the vehicle automatically parks, the second operating condition data of the vehicle is collected, and it is determined whether the second operating condition data meets the preset parking start conditions. If the second operating condition data meets the preset parking start conditions, the two-speed automatic transmission is controlled to maintain the first gear multi-plate wet clutch lock, the second gear multi-plate wet clutch lock is released, and the automatic parking indicator is canceled from the display in the vehicle instrument panel.

[0059] In practice, after the vehicle completes automatic parking, it needs to determine in real time whether a parking start is required. Therefore, the vehicle collects second-condition data in real time and determines whether this data meets the preset parking start conditions. If the second-condition data meets the preset parking start conditions, it indicates that the vehicle needs to start parking. At this time, the vehicle controls the two-speed automatic transmission to maintain the first-gear multi-plate wet clutch lock-up and disengage the second-gear multi-plate wet clutch lock-up, thus achieving first-gear start. Then, the automatic parking indicator is deactivated on the vehicle's instrument panel. Thus, the vehicle controls the two-speed automatic transmission to maintain the first-gear multi-plate wet clutch lock-up, disengage the second-gear multi-plate wet clutch lock-up, and then release the interlock, thereby achieving parking start.

[0060] As an optional implementation, the second operating condition data includes accelerator pedal opening and accelerator pedal depressing duration. The vehicle determines whether the second operating condition data meets the preset parking and start-up conditions as follows: if the accelerator pedal opening is greater than or equal to a preset second accelerator pedal opening threshold, and the accelerator pedal depressing duration is greater than or equal to a preset second depressing duration threshold, then the second operating condition data is determined to meet the preset parking and start-up conditions; otherwise, the second operating condition data is determined not to meet the preset parking and start-up conditions. Optionally, the second accelerator pedal opening threshold is 10%, and the second depressing duration threshold is 200ms. In this way, selecting multiple dimensions of second operating condition data can more accurately determine whether the vehicle meets the parking and start-up conditions, preventing damage to the two-speed automatic transmission from attempting to start when the vehicle is automatically parked and the first and second gear multi-plate wet clutches are interlocked.

[0061] Figure 5 A flowchart illustrating an example of an automatic parking method provided in this application embodiment is shown below. Figure 5 As shown, the specific processing procedure is as follows.

[0062] Step 501: Is the vehicle's AUTOHOLD switch in the active state?

[0063] If the AUTOHOLD switch is in the ON state, then proceed to step 504 after step 502; otherwise, proceed to step 503.

[0064] Step 502: The vehicle instrument panel displays "AUTOHOLD function activated".

[0065] Step 503: Disable the AUTOHOLD function.

[0066] Step 504: Determine whether the vehicle is in D gear.

[0067] If the vehicle is in D gear, proceed to step 505; otherwise, proceed to step 503.

[0068] Step 505: Determine whether the motor speed is less than or equal to 20 rpm, the vehicle speed is less than or equal to 3 km / h, the brake pedal opening is greater than or equal to 30%, the brake pedal pressing time is greater than or equal to 500 ms, and the accelerator pedal opening is less than or equal to 0.

[0069] If yes, proceed to step 506; otherwise, proceed to step 501.

[0070] Step 506: Control the first gear multi-plate wet clutch and the second gear multi-plate wet clutch in the two-speed automatic transmission to lock simultaneously, and display the automatic parking indicator on the vehicle instrument panel.

[0071] Step 507: Determine whether the accelerator pedal opening is greater than or equal to 10% and whether the accelerator pedal pressing duration is greater than or equal to 200ms.

[0072] If yes, proceed to step 508; otherwise, proceed to step 506.

[0073] Step 508: Control the two-speed automatic transmission to maintain the first gear multi-plate wet clutch lock, release the second gear multi-plate wet clutch lock, and cancel the display of the automatic parking indicator in the vehicle instrument panel.

[0074] This application provides an automatic parking method: (1) The vehicle does not use EPB brake calipers for assisted parking. Automatic parking is achieved by simultaneously locking the first and second gear multi-plate wet clutches in the two-speed automatic transmission, thereby decoupling the parking system from the braking system and reducing the wear rate of the friction pads and brake discs. (2) If the vehicle suddenly loses power while parking, the hydraulic system pressure of the two-speed automatic transmission will gradually decrease to zero. The first and second gear multi-plate wet clutches will automatically disengage, allowing the user to pull over to avoid traffic congestion. After pulling over, the vehicle is parked using the handbrake. (3) When a system communication conflict occurs, the two-speed automatic transmission will initiate a limp-out program when it detects that the system communication cannot be responded to. The second gear multi-plate wet clutch will be disengaged, and only the first gear multi-plate wet clutch will be locked, achieving low-speed driving to achieve the goal of getting out of trouble.

[0075] It should be understood that, although Figures 4 to 5 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figures 4 to 5 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0076] It is understood that the same / similar parts between the various embodiments of the methods described above in this specification can be referred to each other. Each embodiment focuses on the differences from other embodiments, and relevant parts can be referred to the description of other method embodiments.

[0077] This application also provides an automatic parking device, which is applied to vehicles equipped with a two-speed automatic transmission, such as... Figure 6 As shown, the device includes:

[0078] The first judgment module 610 is used to collect the first operating condition data of the vehicle when the automatic parking switch of the vehicle is in the on state, and to determine whether the first operating condition data meets the preset automatic parking conditions.

[0079] The first control module 620 is used to control the first gear multi-plate wet clutch and the second gear multi-plate wet clutch in the two-speed automatic transmission to lock simultaneously if the first working condition data meets the preset automatic parking conditions; the gear ratio of the first gear multi-plate wet clutch is different from that of the second gear multi-plate wet clutch, and after being locked simultaneously, the first gear multi-plate wet clutch and the second gear multi-plate wet clutch form an interlock to realize automatic parking;

[0080] The first display module 630 is used to display an automatic parking indicator on the vehicle's instrument panel; the automatic parking indicator is used to remind the user that the vehicle is in automatic parking mode.

[0081] As an optional implementation, the first operating condition data includes vehicle gear position, motor speed, vehicle speed, brake pedal opening, brake pedal depress duration, and accelerator pedal opening; the first judgment module 610 is specifically used for:

[0082] If the vehicle is in drive, and the motor speed is less than or equal to a preset motor speed threshold, the vehicle speed is less than or equal to a preset vehicle speed threshold, the brake pedal opening is greater than or equal to a preset brake pedal opening threshold, the brake pedal depress duration is greater than or equal to a first depress duration threshold, and the accelerator pedal opening is less than or equal to a first accelerator pedal opening threshold, then the first operating condition data is determined to meet the preset automatic parking conditions; otherwise, the first operating condition data is determined not to meet the preset automatic parking conditions.

[0083] As an optional implementation, the motor speed threshold is 20 rpm, the vehicle speed threshold is 3 km / h, the brake pedal opening threshold is 30%, the first pedal duration threshold is 500 ms, and the first accelerator pedal opening threshold is 0.

[0084] As an optional implementation, the device further includes:

[0085] The second judgment module is used to collect the second operating condition data of the vehicle after the vehicle automatically parks, and to determine whether the second operating condition data meets the preset parking start conditions.

[0086] The second control module is used to control the two-speed automatic transmission to maintain the first gear multi-plate wet clutch lock-up and release the second gear multi-plate wet clutch lock-up if the second working condition data meets the preset parking start conditions.

[0087] The second display module is used to cancel the display of the automatic parking indicator in the vehicle's instrument panel.

[0088] As an optional implementation, the second operating condition data includes the accelerator pedal opening and the duration of accelerator pedal depressing; the second judgment module is specifically used for:

[0089] If the accelerator pedal opening is greater than or equal to the preset second accelerator pedal opening threshold, and the accelerator pedal pressing duration is greater than or equal to the preset second pressing duration threshold, then the second operating condition data is determined to meet the preset parking and starting conditions; otherwise, the second operating condition data is determined not to meet the preset parking and starting conditions.

[0090] As an optional implementation, the second accelerator pedal opening threshold is 10%, and the second pedal duration threshold is 200ms.

[0091] Specific limitations regarding the automatic parking device can be found in the limitations of the automatic parking method described above, and will not be repeated here. Each module in the aforementioned automatic parking device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0092] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0093] It should also 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 display, data used for analysis, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0094] The various embodiments in this specification are described in a related manner. Similar or identical parts between embodiments can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions of the method embodiments.

[0095] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0096] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An automatic parking method, characterized in that, The method is applied to vehicles equipped with a two-speed automatic transmission, and the method includes: With the vehicle's automatic parking switch on, the first operating condition data of the vehicle is collected, and it is determined whether the first operating condition data meets the preset automatic parking conditions. If the first operating condition data meets the preset automatic parking conditions, then the first gear multi-plate wet clutch and the second gear multi-plate wet clutch in the two-speed automatic transmission are locked simultaneously. The gear ratio of the first gear multi-plate wet clutch is different from that of the second gear multi-plate wet clutch. After being locked simultaneously, the first gear multi-plate wet clutch and the second gear multi-plate wet clutch form an interlock to achieve automatic parking. The vehicle's instrument panel displays an automatic parking indicator; this indicator serves to alert the user that the vehicle is in automatic parking mode.

2. The method according to claim 1, characterized in that, The first operating condition data includes vehicle gear, motor speed, vehicle speed, brake pedal opening, brake pedal duration, and accelerator pedal opening; The step of determining whether the first operating condition data meets the preset automatic parking conditions includes: If the vehicle is in drive, and the motor speed is less than or equal to a preset motor speed threshold, the vehicle speed is less than or equal to a preset vehicle speed threshold, the brake pedal opening is greater than or equal to a preset brake pedal opening threshold, the brake pedal depress duration is greater than or equal to a first depress duration threshold, and the accelerator pedal opening is less than or equal to a first accelerator pedal opening threshold, then the first operating condition data is determined to meet the preset automatic parking conditions; otherwise, the first operating condition data is determined not to meet the preset automatic parking conditions.

3. The method according to claim 2, characterized in that, The motor speed threshold is 20 rpm, the vehicle speed threshold is 3 km / h, the brake pedal opening threshold is 30%, the first pedal duration threshold is 500 ms, and the first accelerator pedal opening threshold is 0.

4. The method according to claim 1, characterized in that, The method further includes: After the vehicle automatically parks, the second operating condition data of the vehicle is collected, and it is determined whether the second operating condition data meets the preset parking start conditions. If the second operating condition data meets the preset parking and starting conditions, then control the two-speed automatic transmission to maintain the first gear multi-plate wet clutch lock and release the second gear multi-plate wet clutch lock. The automatic parking indicator is removed from the vehicle's instrument panel.

5. The method according to claim 4, characterized in that, The second operating condition data includes the accelerator pedal opening and the duration of accelerator pedal depressing; The step of determining whether the second operating condition data meets the preset parking start conditions includes: If the accelerator pedal opening is greater than or equal to a preset second accelerator pedal opening threshold, and the accelerator pedal depressing duration is greater than or equal to a preset second depressing duration threshold, then the second operating condition data is determined to meet the preset parking and starting conditions; otherwise, the second operating condition data is determined not to meet the preset parking and starting conditions.

6. The method according to claim 5, characterized in that, The second accelerator pedal opening threshold is 10%, and the second pedal duration threshold is 200ms.

7. An automatic parking device, characterized in that, The device is used in vehicles equipped with a two-speed automatic transmission, and the device includes: The first judgment module is used to collect the first operating condition data of the vehicle when the automatic parking switch of the vehicle is in the on state, and to determine whether the first operating condition data meets the preset automatic parking conditions. The first control module is used to control the first gear multi-plate wet clutch and the second gear multi-plate wet clutch in the two-speed automatic transmission to lock simultaneously if the first working condition data meets the preset automatic parking conditions; the gear ratio of the first gear multi-plate wet clutch is different from that of the second gear multi-plate wet clutch, and after being locked simultaneously, the first gear multi-plate wet clutch and the second gear multi-plate wet clutch form an interlock to realize automatic parking. The first display module is used to display an automatic parking indicator on the vehicle's instrument panel; the automatic parking indicator is used to remind the user that the vehicle is in automatic parking mode.

8. The apparatus according to claim 7, characterized in that, The first operating condition data includes vehicle gear position, motor speed, vehicle speed, brake pedal opening, brake pedal duration, and accelerator pedal opening; the first judgment module is specifically used for: If the vehicle is in drive, and the motor speed is less than or equal to a preset motor speed threshold, the vehicle speed is less than or equal to a preset vehicle speed threshold, the brake pedal opening is greater than or equal to a preset brake pedal opening threshold, the brake pedal depress duration is greater than or equal to a first depress duration threshold, and the accelerator pedal opening is less than or equal to a first accelerator pedal opening threshold, then the first operating condition data is determined to meet the preset automatic parking conditions; otherwise, the first operating condition data is determined not to meet the preset automatic parking conditions.

9. The apparatus according to claim 7, characterized in that, The device further includes: The second judgment module is used to collect the second operating condition data of the vehicle after the vehicle automatically parks, and to determine whether the second operating condition data meets the preset parking start conditions. The second control module is used to control the two-speed automatic transmission to maintain the first-speed multi-plate wet clutch lock-up and release the second-speed multi-plate wet clutch lock-up if the second operating condition data meets the preset parking start conditions. The second display module is used to cancel the display of the automatic parking indicator in the vehicle's instrument panel.

10. The apparatus according to claim 9, characterized in that, The second operating condition data includes the accelerator pedal opening and the duration of accelerator pedal depressing; the second judgment module is specifically used for: If the accelerator pedal opening is greater than or equal to a preset second accelerator pedal opening threshold, and the accelerator pedal depressing duration is greater than or equal to a preset second depressing duration threshold, then the second operating condition data is determined to meet the preset parking and starting conditions; otherwise, the second operating condition data is determined not to meet the preset parking and starting conditions.

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