Differential lock control method and device, vehicle and storage medium

Abstract

The application is suitable for the technical field of differential lock control, and provides a differential lock control method, device, vehicle and storage medium, wherein the method comprises the following steps: acquiring vehicle running parameters corresponding to a target differential lock of a target vehicle when the target differential lock is locked; judging whether the target vehicle has escaped from a trouble according to the vehicle running parameters and a preset non-escape-from-trouble condition; and controlling the target differential lock to be unlocked when the target vehicle has escaped from the trouble. After the differential lock is locked, whether the vehicle has escaped from the trouble is judged according to the vehicle running parameters corresponding to the locked differential lock and the preset non-escape-from-trouble condition, and the locked differential lock is automatically unlocked only when the vehicle has escaped from the trouble, which helps to improve the driving experience and driving safety of the user.

Description

Technical Field

[0001] This application belongs to the field of differential lock control technology, and particularly relates to a differential lock control method, device, vehicle and storage medium. Background Technology

[0002] Differential locks are typically used to help vehicles get out of trouble. In practice, when a vehicle is in a difficult situation, such as when one side of the vehicle is slipping, locking the differential lock can transfer some or all of the torque to the non-slipping side. This allows the vehicle to utilize the traction of the non-slipping side to generate sufficient traction, enabling the vehicle to continue moving. However, in real-world applications, locking the differential lock under normal driving conditions can easily lead to traffic accidents. For example, if the differential lock is engaged while the vehicle is making a high-speed turn, a traffic accident is highly likely.

[0003] In related technologies, differential locks typically unlock automatically after being engaged and when the vehicle speed exceeds a certain threshold. However, in actual driving situations, such as off-roading, when a vehicle is stuck, relying solely on speed to automatically unlock the differential lock can lead to a situation where the wheels are rapidly slipping and spinning, mistakenly assuming the speed has exceeded the threshold for automatic unlocking, thus triggering the lock to unlock automatically. Since the vehicle's ability to get out of trouble is worse after the differential lock is unlocked, automatically unlocking the differential lock when the wheels are rapidly slipping and spinning will cause the vehicle to continue slipping and sink deeper into the rut, making it impossible to escape and reducing the user's driving experience and safety. Summary of the Invention

[0004] This application provides a differential lock control method, device, vehicle, and storage medium, aiming to solve the problem in related technologies where, after the differential lock is locked, automatically unlocking the differential lock based solely on vehicle speed may result in the vehicle being unable to get out of trouble, reducing the user's driving experience and driving safety.

[0005] In a first aspect, embodiments of this application provide a differential lock control method, the method comprising:

[0006] When the target differential lock of the target vehicle is locked, obtain the vehicle operating parameters corresponding to the target differential lock;

[0007] Based on the vehicle's operating parameters and preset conditions for not being able to get out of trouble, determine whether the target vehicle has been freed from its predicament;

[0008] Once the target vehicle is freed from its predicament, unlock the target differential lock.

[0009] In some embodiments, when the target differential lock is a rear axle differential lock, the vehicle operating parameters corresponding to the target differential lock include transfer case gear information, front wheel speed and rear wheel speed.

[0010] When the target differential lock is the rear axle differential lock and the front axle differential lock, the vehicle operating parameters corresponding to the target differential lock include transfer case gear information, engine torque, and accelerator pedal information.

[0011] In some embodiments, the preset non-escape condition includes a first non-escape condition, and determining whether the target vehicle has escaped the entanglement based on vehicle operating parameters and the preset non-escape condition includes:

[0012] If the target differential lock is a rear axle differential lock, then the target vehicle is determined to be not out of trouble when the vehicle operating parameters meet the first condition for not being out of trouble.

[0013] The first condition for not being able to get out of trouble includes: the transfer case gear information indicates that the target vehicle is in two-wheel drive mode, and the speed difference between the front wheel speed and the rear wheel speed is greater than a preset speed difference threshold.

[0014] In some embodiments, the first condition for not being able to get out of trouble also includes the front wheel speed being less than a preset wheel speed value.

[0015] In some embodiments, the preset non-escape condition includes a second non-escape condition, and determining whether the target vehicle has escaped the entanglement based on vehicle operating parameters and the preset non-escape condition includes:

[0016] If the target differential lock is a rear axle differential lock and a front axle differential lock, then the desired torque of the target vehicle is determined based on the accelerator pedal information, and the target vehicle is determined to be not out of trouble when the vehicle operating parameters meet the second condition for not being out of trouble.

[0017] The second condition for not getting out of trouble includes: the transfer case gear information indicates that the target vehicle is in four-wheel drive mode and the torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

[0018] In some embodiments, determining the desired torque of the target vehicle based on accelerator pedal information includes:

[0019] The system retrieves the torque corresponding to the accelerator pedal information from a pre-stored mapping table and determines the retrieved torque as the desired torque. The mapping table describes the correspondence between the accelerator pedal information and the torque.

[0020] In some embodiments, when the target vehicle has escaped entrapment, controlling the unlocking of the target differential lock includes:

[0021] When the target vehicle has escaped the predicament and its speed exceeds a preset speed threshold, the target differential lock is unlocked.

[0022] Secondly, embodiments of this application provide a differential lock control device, comprising:

[0023] The information acquisition unit is used to acquire the vehicle operating parameters corresponding to the target differential lock when the target differential lock of the target vehicle is locked.

[0024] The information determination unit is used to determine whether the target vehicle has escaped from the entanglement based on the vehicle's operating parameters and preset entanglement conditions;

[0025] The control execution unit is used to unlock the target differential lock when the target vehicle has escaped the entrapment.

[0026] In some embodiments, when the target differential lock is a rear axle differential lock, the vehicle operating parameters corresponding to the target differential lock include transfer case gear information, front wheel speed and rear wheel speed.

[0027] When the target differential lock is the rear axle differential lock and the front axle differential lock, the vehicle operating parameters corresponding to the target differential lock include transfer case gear information, engine torque, and accelerator pedal information.

[0028] In some embodiments, the preset non-getting-out-of-trouble conditions include a first non-getting-out-of-trouble condition, and the information determination unit is specifically used to: if the target differential lock is a rear axle differential lock, then when the vehicle operating parameters meet the first non-getting-out-of-trouble condition, determine that the target vehicle is not out of trouble;

[0029] The first condition for not being able to get out of trouble includes: the transfer case gear information indicates that the target vehicle is in two-wheel drive mode, and the speed difference between the front wheel speed and the rear wheel speed is greater than a preset speed difference threshold.

[0030] In some embodiments, the first condition for not being able to get out of trouble also includes the front wheel speed being less than a preset wheel speed value.

[0031] In some embodiments, the preset non-getting-out-of-trouble condition includes a second non-getting-out-of-trouble condition, and the information determination unit is specifically used to: if the target differential lock is a rear axle differential lock and a front axle differential lock, determine the desired torque of the target vehicle based on the accelerator pedal information, and determine that the target vehicle is not out of trouble when the vehicle operating parameters meet the second non-getting-out-of-trouble condition;

[0032] The second condition for not getting out of trouble includes: the transfer case gear information indicates that the target vehicle is in four-wheel drive mode and the torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

[0033] In some embodiments, the information determination unit determines the desired torque of the target vehicle based on the accelerator pedal information, including:

[0034] The system retrieves the torque corresponding to the accelerator pedal information from a pre-stored mapping table and determines the retrieved torque as the desired torque. The mapping table describes the correspondence between the accelerator pedal information and the torque.

[0035] In some embodiments, the control execution unit is specifically used to: control the target differential lock to unlock when the target vehicle has escaped the predicament and the target vehicle's speed is greater than a preset speed threshold.

[0036] Thirdly, embodiments of this application provide a vehicle including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the steps of any of the above-described differential lock control methods.

[0037] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of any of the above-described differential lock control methods.

[0038] Fifthly, embodiments of this application provide a computer program product that, when run on a vehicle, causes the vehicle to execute any of the aforementioned differential lock control methods.

[0039] The beneficial effects of this application embodiment compared with related technologies are: after the differential lock is locked, the vehicle's operating parameters corresponding to the locked differential lock and the preset unstuck conditions are used to determine whether the vehicle has escaped the stalemate, and the locked differential lock is automatically unlocked only when the vehicle has escaped the stalemate, which helps to improve the user's driving experience and driving safety.

[0040] It is understood that the beneficial effects of the second to fifth aspects mentioned above can be found in the relevant descriptions in the first aspect mentioned above, and will not be repeated here. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, 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 this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This is a schematic flowchart of a differential lock control method provided in an embodiment of this application;

[0043] Figure 2 This is a schematic diagram of a differential lock provided in an embodiment of this application;

[0044] Figure 3 This is a schematic diagram of the control principle of a differential lock provided in an embodiment of this application;

[0045] Figure 4 This is a schematic diagram of the structure of a differential lock control device provided in an embodiment of this application;

[0046] Figure 5 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this application. Detailed Implementation

[0047] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0048] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0049] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0050] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0051] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0052] References to "one embodiment" or "some embodiments" in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0053] To illustrate the technical solution of this application, the following embodiments will be used for explanation.

[0054] Example 1

[0055] Please see Figure 1 This application provides a differential lock control method, such as... Figure 1 As shown, the differential lock control method may include the following steps 101-103.

[0056] Step 101: When the target differential lock of the target vehicle is locked, obtain the vehicle operating parameters corresponding to the target differential lock.

[0057] The target vehicle mentioned above can be any type of vehicle. The target differential lock is typically the differential lock on the target vehicle. In practice, when only a rear axle differential lock is installed on the target vehicle, the target differential lock can be a rear axle differential lock. When both a front axle and a rear axle differential lock are installed on the target vehicle, the target differential lock can be a rear axle differential lock, or it can be both a rear axle differential lock and a front axle differential lock.

[0058] The vehicle operating parameters mentioned above are typically parameters observed during vehicle operation. In practice, these parameters may include transfer case gear position information, front wheel speeds, and rear wheel speeds. The transfer case gear position information indicates the target vehicle's drive mode. Different transfer case gear positions indicate different drive modes. The front wheel speeds refer to the rotational speeds of the front wheels. The rear wheel speeds refer to the rotational speeds of the rear wheels. In practice, the front wheel speeds are usually the average rotational speeds of the two front wheels. The rear wheel speeds are usually the average rotational speeds of the two rear wheels.

[0059] In this embodiment, the executing entity of the above differential lock control method is usually a vehicle, and specifically it can be a controller in the vehicle used to control the differential lock.

[0060] In practice, while the target vehicle is in motion, the user can lock and unlock the differential lock switch installed on the vehicle. The locking operation is typically used to lock the differential lock, and the unlocking operation is typically used to unlock it. For example, the locking operation can be implemented by pressing the differential lock switch downwards, and the unlocking operation can be implemented by pressing the differential lock switch upwards. This embodiment does not limit the specific operations corresponding to the locking and unlocking operations. When the user performs a locking operation on the differential lock switch, the execution entity can detect the locking operation through a sensor and lock the differential lock accordingly.

[0061] When the target differential lock in the target vehicle is locked, the aforementioned execution entity can obtain information about the locked differential lock and the corresponding vehicle operating parameters. For example, vehicle operating parameters can be obtained from corresponding sensors on the target vehicle; for instance, the front wheel speed, or front wheel rotation speed, can be obtained from the speed sensors at the front wheels of the target vehicle.

[0062] In practical applications, when the target differential lock is a rear axle differential lock, the vehicle operating parameters corresponding to this target differential lock can be transfer case gear information, front wheel speed, and rear wheel speed. When the target differential locks are both a front axle and a rear axle differential lock, the corresponding vehicle operating parameters can be transfer case gear information, engine torque, and accelerator pedal information. The accelerator pedal information is typically used to indicate throttle depth; a deeper throttle usually results in greater engine torque and higher vehicle speed. In practical applications, vehicle speed typically refers to the average rotational speed of each drive wheel. Here, using the vehicle operating parameters corresponding to the locked differential locks to determine whether the vehicle is out of trouble when different differential locks are engaged helps to achieve a more flexible and accurate assessment of whether the vehicle is out of trouble.

[0063] Figure 2 This is a schematic diagram of the differential lock provided in one embodiment of this application. Figure 2 As shown, a differential lock can include a housing, thrust washer, locking gear, locking ring, cam disc, solenoid coil, push rod, planetary gear, spherical washer, and return spring. In practical applications, when one wheel of the vehicle slips, the driver can press the differential lock locking control switch. The differential lock control unit in the vehicle, which controls the differential lock, can drive the solenoid coil when it is determined that it is appropriate to lock the differential. After the solenoid coil is energized, the cam disc is attracted by electromagnetic force. As the differential rotates, it pushes the push rod to slide, and the push rod pushes the locking ring. The inner spline of the locking ring engages with the outer spline of the locking gear to lock it in place. The outer spline of the locking ring engages with the groove of the differential housing. The locking ring locks the left locking gear and the differential housing together, thus locking the entire differential. In this way, the vehicle loses its differential function, and power is transmitted to the effective wheel side, that is, to the wheel side that is not slipping, enabling the vehicle to get out of trouble.

[0064] Figure 3 This is a schematic diagram illustrating the working principle of a differential lock provided in an embodiment of this application. Figure 3 As shown, the differential lock control unit, used to control the differential lock, inputs current to the solenoid coil. The solenoid coil generates an electromagnetic force that prevents the cam disc from rotating. Then, the push rod presses the locking ring in, thereby locking the differential lock. Conversely, after the differential lock control unit cuts off the current to the solenoid coil, the solenoid coil loses its electromagnetic force. At this point, the return spring pushes the locking ring out, and the differential lock opens, i.e., unlocks.

[0065] Step 102: Determine whether the target vehicle has escaped the entanglement based on the vehicle's operating parameters and the preset entanglement conditions.

[0066] The aforementioned preset conditions for not being able to get out of trouble are typically pre-set conditions used to indicate that the vehicle is not out of trouble. As an example, the aforementioned preset conditions for not being able to get out of trouble may be: the front wheel speed is less than a preset wheel speed value, and the speed difference between the front wheel speed and the rear wheel speed is greater than a preset threshold.

[0067] Here, the aforementioned executing entity can analyze vehicle operating parameters based on preset conditions for not being out of trouble, thereby determining whether the target vehicle has been freed. As an example, if the preset condition for not being out of trouble is that the difference between the rear wheel speed and the front wheel speed is greater than a certain preset threshold, such as greater than 60 revolutions per minute (rpm), then the aforementioned executing entity can determine that the target vehicle has not been freed when the difference between the rear wheel speed and the front wheel speed of the target vehicle is greater than the preset threshold.

[0068] Step 103: Once the target vehicle has escaped the predicament, unlock the target differential lock.

[0069] Here, the aforementioned executing entity can automatically unlock the target differential lock once it is determined that the target vehicle has escaped the predicament. In practice, the executing entity can send an unlocking command to the differential lock control unit used to control the target differential lock, thereby enabling the target differential lock to automatically unlock through the differential lock control unit. The unlocking command is used to instruct the target differential lock to unlock.

[0070] The method provided in this embodiment determines whether the vehicle has escaped entrapment by using the vehicle operating parameters corresponding to the locked differential lock and preset entrapment conditions after the differential lock is locked, and automatically unlocks the locked differential lock only when the vehicle has escaped entrapment, which helps to improve the user's driving experience and driving safety.

[0071] In some optional implementations of this embodiment, the above step 101, which involves obtaining the vehicle operating parameters corresponding to the target differential lock, may include: when the target differential lock is a rear axle differential lock, obtaining transfer case gear information, front wheel speed, and rear wheel speed.

[0072] At this time, the above vehicle operating parameters may include transfer case gear information, front wheel speed, and rear wheel speed.

[0073] The transfer case gear information mentioned above indicates the drive mode of the target vehicle. Different transfer case gears indicate different drive modes. The front wheel speeds mentioned above refer to the rotational speeds of the front wheels. The rear wheel speeds mentioned above refer to the rotational speeds of the rear wheels. In practice, the front wheel speeds mentioned above are usually the average rotational speeds of the two front wheels. The rear wheel speeds mentioned above are usually the average rotational speeds of the two rear wheels.

[0074] Here, under different differential lock conditions, the vehicle operating parameters corresponding to the locked differential lock are used to analyze the target vehicle's extrication status, which helps to more flexibly and accurately determine whether the vehicle is out of trouble.

[0075] In some implementations, where the preset conditions for not being able to get out of trouble include a first condition for not being able to get out of trouble, step 102 above, where determining whether the target vehicle has been freed from trouble based on vehicle operating parameters and the preset conditions for not being able to get out of trouble, may include: if the target differential lock is a rear axle differential lock, then if the vehicle operating parameters meet the first condition for not being able to get out of trouble, it is determined that the target vehicle has not been freed from trouble. In this implementation, if the vehicle operating parameters do not meet the first condition for not being able to get out of trouble, it can be determined that the target vehicle has been freed from trouble.

[0076] The first condition for not being able to get out of trouble includes: the transfer case gear information indicates that the target vehicle is in two-wheel drive mode, and the speed difference between the front wheel speed and the rear wheel speed is greater than a preset speed difference threshold.

[0077] The aforementioned preset speed difference threshold is usually a pre-set value, such as 50 rpm.

[0078] In practice, when the target differential lock is a rear axle differential lock and the target vehicle is in two-wheel drive mode, the target vehicle's drive wheels are the rear wheels. If the rear wheel speed is significantly higher than the front wheel speed, it indicates that the target vehicle's rear wheels are slipping, meaning the target vehicle has not yet escaped its predicament.

[0079] This embodiment can accurately and effectively determine whether a target vehicle is out of trouble when the target differential lock is a rear axle differential lock.

[0080] In some implementations, the first condition for not being able to get out of trouble may also include the front wheel speed being less than a preset wheel speed value. This preset wheel speed value is usually a pre-set wheel speed value, for example, 5 rpm. In practice, this preset wheel speed value is usually relatively small.

[0081] Here, the first condition for not getting out of trouble also includes when the front wheel speed is less than the preset wheel speed value. The first condition for not getting out of trouble can be: the target vehicle is in two-wheel drive mode, and the speed difference between the front wheel speed and the rear wheel speed is greater than the preset speed difference threshold, and the front wheel speed is less than the preset wheel speed value.

[0082] Here, since a vehicle is generally considered to be out of trouble when it can continue to move forward on a slippery surface—for example, if a vehicle can continue to move forward in mud—it is considered out of trouble. Therefore, relying solely on the difference in wheel speed between the front and rear wheels to determine whether a vehicle is out of trouble may lead to misjudgment. Considering the front wheel speed in the first condition of not being out of trouble can avoid such misjudgment, thus helping to make a more accurate and effective judgment on whether the target vehicle is out of trouble.

[0083] In some optional implementations of the embodiments, the above step 101, in which the vehicle operating parameters corresponding to the target differential lock are obtained, may include: when the target differential lock is a rear axle differential lock and a front axle differential lock, obtaining transfer case gear information, engine torque and accelerator pedal information.

[0084] At this time, vehicle operating parameters may include transfer case gear information, engine torque, and accelerator pedal information.

[0085] The transfer case gear information indicates the target vehicle's drive mode. Different transfer case gears indicate different drive modes. The accelerator pedal information typically indicates the accelerator pedal depth; deeper accelerator pedal input results in higher vehicle speed.

[0086] Here, under different differential lock conditions, the vehicle operating parameters corresponding to the locked differential lock are used to analyze the target vehicle's extrication status, which helps to more flexibly and accurately determine whether the vehicle is out of trouble.

[0087] In some implementations, where the preset non-getting-out-of-trouble conditions include a second non-getting-out-of-trouble condition, step 102 above, where determining whether the target vehicle has gotten out of trouble based on vehicle operating parameters and the preset non-getting-out-of-trouble conditions, may include: if the target differential lock is a rear axle differential lock and a front axle differential lock, then determining the target vehicle's desired torque based on accelerator pedal information, and determining that the target vehicle has not gotten out of trouble when the vehicle operating parameters meet the second non-getting-out-of-trouble condition. In this implementation, even if the vehicle operating parameters do not meet the second non-getting-out-of-trouble condition, it can be determined that the target vehicle has gotten out of trouble.

[0088] The second condition for not getting out of trouble includes: the transfer case gear information indicates that the target vehicle is in four-wheel drive mode and the torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

[0089] The desired torque mentioned above is typically the engine torque corresponding to the accelerator pedal information. The preset torque difference threshold is usually a pre-set value, for example, 50 Nm.

[0090] Here, the accelerator pedal depth indicated by the accelerator pedal information typically has a mapping relationship with the engine's desired torque. For example, when the accelerator pedal depth is 20%, the engine torque may correspond to 150 N·m, and when the accelerator pedal depth is 40%, the engine torque may correspond to 200 N·m. Therefore, the aforementioned actuator can use the accelerator pedal depth indicated by the accelerator pedal information to find the corresponding desired torque from the above mapping relationship. Then, the actuator can use the obtained desired torque and the engine's actual torque to assess the target vehicle's ability to escape difficult situations.

[0091] In practice, when the target differential locks are a front axle differential lock and a rear axle differential lock, and the target vehicle is in four-wheel drive mode, the target vehicle's drive wheels are the front and rear wheels. At this time, the engine drives all four wheels to rotate. During vehicle operation, if the actual torque of the engine is significantly less than the expected torque corresponding to the accelerator pedal depth, it indicates that one or more wheels of the target vehicle may be slipping, meaning the target vehicle has not yet escaped its predicament.

[0092] This embodiment can accurately and effectively determine whether a target vehicle is out of trouble when the target differential locks are the front axle differential lock and the rear axle differential lock.

[0093] In some implementations, determining the desired torque of the target vehicle based on the accelerator pedal information may include: looking up the torque corresponding to the accelerator pedal information from a pre-stored correspondence table, and determining the found torque as the desired torque.

[0094] The correspondence table describes the relationship between accelerator pedal information and torque. For example, when the accelerator pedal information is 60%, the corresponding torque can be 300 N·m; when the accelerator pedal information is 100%, the corresponding torque can be 500 N·m.

[0095] Here, the executing entity can directly retrieve the torque corresponding to the current accelerator pedal information from the aforementioned correspondence table, and determine the retrieved torque as the desired torque. This operation is simple, easy to implement, and helps improve data processing efficiency.

[0096] In optional implementations of various embodiments, the differential lock control method described above may further include the following step: when the target vehicle is not freed from its predicament, the control of unlocking the target differential lock is not performed.

[0097] Here, by not unlocking the target differential lock while the target vehicle is still stuck, the user's driving experience and driving safety can be further guaranteed.

[0098] In optional implementations of various embodiments, step 103 above, which involves controlling the target differential lock to unlock when the target vehicle has escaped the predicament, may include: controlling the target differential lock to unlock when the target vehicle has escaped the predicament and the target vehicle's speed is greater than a preset speed threshold.

[0099] The aforementioned preset speed threshold is usually a pre-set speed value, such as 40 kilometers per hour (km / h).

[0100] In practice, the target differential lock is usually automatically unlocked when it is determined that the target vehicle has escaped the pre-set speed threshold. This ensures the vehicle's driving force at low speeds and guarantees driving safety, thereby further improving the user's driving experience and safety.

[0101] Example 2

[0102] Corresponding to the differential lock control method in the above embodiment, Figure 4 A structural block diagram of a differential lock control device 400 provided in an embodiment of this application is shown. For ease of explanation, only the parts relevant to the embodiment of this application are shown. (Refer to...) Figure 4 The device includes an information acquisition unit 401, an information determination unit 402, and a control execution unit 403.

[0103] The information acquisition unit 401 is used to acquire vehicle operating parameters corresponding to the target differential lock when the target differential lock of the target vehicle is locked.

[0104] The information determination unit 402 is used to determine whether the target vehicle has been freed from its entrapment based on the vehicle's operating parameters and preset conditions for not being freed from entrapment.

[0105] The control execution unit 403 is used to control the unlocking of the target differential lock when the target vehicle has been freed from the entrapment.

[0106] In some embodiments, when the target differential lock is a rear axle differential lock, the vehicle operating parameters corresponding to the target differential lock include transfer case gear information, front wheel speed and rear wheel speed.

[0107] When the target differential lock is the rear axle differential lock and the front axle differential lock, the vehicle operating parameters corresponding to the target differential lock include transfer case gear information, engine torque, and accelerator pedal information.

[0108] In some embodiments, the preset non-getting-out-of-trouble conditions include a first non-getting-out-of-trouble condition, and the information determination unit 402 is specifically used to: if the target differential lock is a rear axle differential lock, then when the vehicle operating parameters meet the first non-getting-out-of-trouble condition, determine that the target vehicle is not out of trouble;

[0109] The first condition for not being able to get out of trouble includes: the transfer case gear information indicates that the target vehicle is in two-wheel drive mode, and the speed difference between the front wheel speed and the rear wheel speed is greater than a preset speed difference threshold.

[0110] In some embodiments, the first condition for not being able to get out of trouble also includes the front wheel speed being less than a preset wheel speed value.

[0111] In some embodiments, the preset non-getting-out-of-trouble condition includes a second non-getting-out-of-trouble condition, and the information determination unit 402 is specifically used to: if the target differential lock is a rear axle differential lock and a front axle differential lock, determine the desired torque of the target vehicle based on the accelerator pedal information, and determine that the target vehicle is not out of trouble when the vehicle operating parameters meet the second non-getting-out-of-trouble condition;

[0112] The second condition for not getting out of trouble includes: the transfer case gear information indicates that the target vehicle is in four-wheel drive mode and the torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

[0113] In some embodiments, the information determination unit 402 determines the desired torque of the target vehicle based on the accelerator pedal information, including:

[0114] The system retrieves the torque corresponding to the accelerator pedal information from a pre-stored mapping table and determines the retrieved torque as the desired torque. The mapping table describes the correspondence between the accelerator pedal information and the torque.

[0115] In some embodiments, the control execution unit 403 is specifically used to: control the target differential lock to unlock when the target vehicle has escaped the predicament and the target vehicle's speed is greater than a preset speed threshold.

[0116] The device provided in this embodiment determines whether the vehicle has escaped entrapment by using the vehicle operating parameters corresponding to the locked differential lock and preset entrapment conditions after the differential lock is locked, and automatically unlocks the locked differential lock only when the vehicle has escaped entrapment, which helps to improve the user's driving experience and driving safety.

[0117] It should be noted that the information interaction and execution process between the above-mentioned devices / units are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0118] Example 3

[0119] Figure 5 This is a structural schematic diagram of a vehicle 500 provided in one embodiment of this application. Figure 5 As shown, the vehicle 500 of this embodiment includes: at least one processor 501 ( Figure 5Only one processor is shown, along with a memory 502 and a computer program 503 stored in the memory 502 and executable on at least one processor 501, such as a differential lock control program. When the processor 501 executes the computer program 503, it implements the steps in any of the above-described method embodiments. When the processor 501 executes the computer program 503, it implements the steps in the embodiments of the above-described differential lock control methods. When the processor 501 executes the computer program 503, it implements the functions of each module / unit in the above-described device embodiments, such as... Figure 4 The functions of the information acquisition unit 401, information determination unit 402, and control execution unit 403 shown are illustrated.

[0120] For example, computer program 503 can be divided into one or more modules / units, one or more of which are stored in memory 502 and executed by processor 501 to complete this application. One or more modules / units can be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of computer program 503 in vehicle 500. For example, computer program 503 can be divided into an information acquisition unit, an information determination unit, and a control execution unit. The specific functions of each unit have been described in the above embodiments and will not be repeated here.

[0121] Vehicle 500 may include, but is not limited to, processor 501 and memory 502. Those skilled in the art will understand that... Figure 5 This is merely an example of vehicle 500 and does not constitute a limitation on vehicle 500. It may include more or fewer components than shown, or combine certain components, or different components. For example, a vehicle may also include input / output devices, network access devices, buses, etc.

[0122] The processor 501 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0123] The memory 502 can be an internal storage unit of the vehicle 500, such as a hard drive or RAM. The memory 502 can also be an external storage device of the vehicle 500, such as a plug-in hard drive, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card. Furthermore, the memory 502 can include both internal and external storage units of the vehicle 500. The memory 502 is used to store computer programs and other programs and data required by the vehicle. The memory 502 can also be used to temporarily store data that has been output or will be output.

[0124] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0125] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0126] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0127] In the embodiments provided in this application, it should be understood that the disclosed devices / vehicles and methods can be implemented in other ways. For example, the device / vehicle embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0128] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0129] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0130] If an integrated module is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. This computer-readable storage medium can be non-volatile or volatile. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable storage medium can include: any entity or device capable of carrying computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the contents of a computer-readable storage medium may be appropriately added to or subtracted from the contents as required by the legislation and patent practice in a jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, a computer-readable storage medium may not include electrical carrier signals and telecommunication signals.

[0131] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A differential lock control method, characterized in that, The method includes: When the target differential lock of the target vehicle is locked, obtain the vehicle operating parameters corresponding to the target differential lock; Based on the vehicle operating parameters and preset conditions for not being able to get out of trouble, determine whether the target vehicle has been freed from its predicament; Once the target vehicle has escaped its predicament, the target differential lock is unlocked. When the target differential lock is a rear axle differential lock, the vehicle operating parameters corresponding to the target differential lock include transfer case gear information, front wheel speed and rear wheel speed; When the target differential lock is a rear axle differential lock and a front axle differential lock, the vehicle operating parameters corresponding to the target differential lock include transfer case gear information, engine torque, and accelerator pedal information.

2. The differential lock control method according to claim 1, characterized in that, The preset conditions for not being able to get out of trouble include a first condition for not being able to get out of trouble, and the step of determining whether the target vehicle has been freed from trouble based on the vehicle operating parameters and the preset conditions for not being able to get out of trouble includes: If the target differential lock is a rear axle differential lock, then when the vehicle operating parameters meet the first unextricable condition, it is determined that the target vehicle is not extricated. The first condition for not being able to get out of trouble includes: the transfer case gear information indicates that the target vehicle is in two-wheel drive mode, and the speed difference between the front wheel speed and the rear wheel speed is greater than a preset speed difference threshold.

3. The differential lock control method according to claim 2, characterized in that, The first condition for not being able to get out of trouble also includes that the front wheel speed is less than a preset wheel speed value.

4. The differential lock control method according to claim 1, characterized in that, The preset non-escape condition includes a second non-escape condition, and the step of determining whether the target vehicle has escaped the entanglement based on the vehicle operating parameters and the preset non-escape condition includes: If the target differential lock is a rear axle differential lock and a front axle differential lock, then the desired torque of the target vehicle is determined based on the accelerator pedal information, and the target vehicle is determined to be not out of trouble when the vehicle operating parameters meet the second unextricable condition; The second condition for not being able to get out of trouble includes: the transfer case gear information indicates that the target vehicle is in four-wheel drive mode and the torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

5. The differential lock control method according to claim 4, characterized in that, Determining the desired torque of the target vehicle based on the accelerator pedal information includes: The torque corresponding to the accelerator pedal information is found from a pre-stored correspondence table, and the found torque is determined as the desired torque. The correspondence table is used to describe the correspondence between the accelerator pedal information and the torque.

6. The differential lock control method according to any one of claims 1-5, characterized in that, The step of unlocking the target differential lock when the target vehicle has been freed from its entrapment includes: When the target vehicle has escaped the predicament and its speed exceeds a preset speed threshold, the target differential lock is unlocked.

7. A differential lock control device, characterized in that, The device includes: The information acquisition unit is used to acquire vehicle operating parameters corresponding to the target differential lock when the target differential lock of the target vehicle is locked. The information determination unit is used to determine whether the target vehicle has escaped from entrapment based on the vehicle operating parameters and preset entrapment conditions; A control execution unit is used to control the unlocking of the target differential lock when the target vehicle has been freed from its predicament; The differential lock control device is also used to, when the target differential lock is a rear axle differential lock, specify the vehicle operating parameters corresponding to the target differential lock, including transfer case gear information, front wheel speed, and rear wheel speed. When the target differential lock is a rear axle differential lock and a front axle differential lock, the vehicle operating parameters corresponding to the target differential lock include transfer case gear information, engine torque, and accelerator pedal information.

8. A vehicle comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the differential lock control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the differential lock control method as described in any one of claims 1 to 6.

Images