CN115648934A - Differential lock control method and device, vehicle and storage medium - Google Patents

Abstract

The application is applicable to the technical field of differential lock control, and provides a differential lock control method, a device, a vehicle and a storage medium, wherein the method comprises the following steps: when a target differential lock of a target vehicle is locked, acquiring vehicle operation parameters corresponding to the target differential lock; judging whether the target vehicle is out of the poverty or not according to the vehicle operation parameters and the preset non-poverty-escaping conditions; and controlling the target differential lock to unlock when the target vehicle is out of the trouble. This application is after the differential lock is locked, through with the vehicle operation parameter that corresponds by the differential lock that is locked and predetermine not getting rid of poverty the condition and judge whether the vehicle has got rid of poverty to and just carry out automatic unblock to the differential lock that is locked under the condition that the vehicle has got rid of poverty, help improving user's driving experience and driving safety.

Description

Differential lock control method and device, vehicle and storage medium

Technical Field

The application belongs to the technical field of differential lock control, and particularly relates to a differential lock control method, a differential lock control device, a vehicle and a storage medium.

Background

Differential locks are commonly used to relieve from difficulties in the entire vehicle. In practice, when the vehicle is in a trouble, for example, when the vehicle slips on one side, the differential lock can be locked to transmit part or all of the torque to the non-slip side, so that the adhesion force of the non-slip side is utilized to generate enough traction force to enable the vehicle to continue running. In practical applications, since a traffic fault is easily caused when the differential lock is locked during normal running of the vehicle, for example, when the vehicle is running in a high-speed turn, the traffic fault is very easily caused if the differential lock is in a locked state.

In the related art, the differential lock is usually unlocked automatically after the differential lock is locked and when the vehicle speed exceeds a certain speed value. However, in the actual driving process, for example, in the off-road process, after the vehicle is stuck, the differential lock is automatically unlocked only according to the vehicle speed, and when the vehicle wheels slip and rotate quickly, the vehicle speed is mistakenly determined to exceed the speed value capable of being automatically unlocked, so that the differential lock is automatically unlocked. Because the vehicle ability of getting rid of poverty is worse after the differential lock unblock, skids when the vehicle wheel rotates fast and unlocks the differential lock automatically, will lead to the vehicle to continuously skid and cross deeply, can't get rid of poverty, reduces user's driving experience and driving safety.

Disclosure of Invention

The embodiment of the application provides a differential lock control method and device, a vehicle and a storage medium, and aims to solve the problems that in the related art, after a differential lock is locked, the differential lock is automatically unlocked only according to the vehicle speed, the vehicle cannot get out of position possibly, and the driving experience and the driving safety of a user are reduced.

In a first aspect, an embodiment of the present application provides a differential lock control method, including:

when a target differential lock of a target vehicle is locked, acquiring vehicle operation parameters corresponding to the target differential lock;

judging whether the target vehicle is out of the poverty or not according to the vehicle operation parameters and the preset non-poverty-escaping conditions;

and controlling the target differential lock to unlock when the target vehicle is out of the trouble.

In some embodiments, when the target differential lock is a rear axle differential lock, the vehicle operation parameters corresponding to the target differential lock include transfer case gear information, a front wheel speed, and a rear wheel speed;

when the target differential lock is a rear axle differential lock and a front axle differential lock, the vehicle operation parameters corresponding to the target differential lock comprise transfer case gear information, engine torque and accelerator pedal information.

In some embodiments, the determining the target vehicle is not trapped by the first vehicle according to the vehicle operating parameter and the predetermined condition includes:

if the target differential lock is a rear axle differential lock, determining that the target vehicle is not trapped when the vehicle operation parameters meet a first un-trapped condition;

wherein the first un-trapped condition comprises: the transfer case gear information indicates that the target vehicle is in a two-wheel drive mode, and the rotating speed difference between the wheel speed of the front wheels and the wheel speed of the rear wheels is larger than a preset rotating speed difference threshold value.

In some embodiments, the first unsalvage condition further comprises a front wheel speed being less than a predetermined wheel speed value.

In some embodiments, the determining the target vehicle is not trapped by the second vehicle according to the vehicle operating parameter and the predetermined condition includes:

if the target differential lock is a rear axle differential lock and a front axle differential lock, determining the expected torque of the target vehicle according to the accelerator pedal information, and determining that the target vehicle is not trapped when the vehicle operation parameters meet a second non-trapping condition;

wherein the second un-trapped condition comprises: the transfer gear information indicates that the target vehicle is in a four-wheel drive mode and a torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

In some embodiments, determining the desired torque of the target vehicle from the accelerator pedal information comprises:

and searching the torque corresponding to the accelerator pedal information from a pre-stored corresponding relation table, and determining the searched torque as the expected torque, wherein the corresponding relation table is used for describing the corresponding relation between the accelerator pedal information and the torque.

In some embodiments, controlling the target differential lock to unlock when the target vehicle has got out of trouble comprises:

and when the target vehicle is trapped and the speed of the target vehicle is greater than a preset speed threshold value, controlling the target differential lock to unlock.

In a second aspect, an embodiment of the present application provides a differential lock control device, including:

the information acquisition unit is used for acquiring vehicle operation parameters corresponding to a target differential lock of a target vehicle when the target differential lock is locked;

the information judgment unit is used for judging whether the target vehicle is trapped according to the vehicle operation parameters and the preset trapped-free condition;

and the control execution unit is used for controlling the target differential lock to unlock when the target vehicle is out of the trouble.

In some embodiments, when the target differential lock is a rear axle differential lock, the vehicle operation parameters corresponding to the target differential lock include transfer case gear information, a front wheel speed, and a rear wheel speed;

when the target differential lock is a rear axle differential lock and a front axle differential lock, the vehicle operation parameters corresponding to the target differential lock comprise transfer case gear information, engine torque and accelerator pedal information.

In some embodiments, the predetermined unsalvage condition includes a first unsalvage condition, and the information determining unit is specifically configured to: if the target differential lock is a rear axle differential lock, determining that the target vehicle is not trapped when the vehicle operation parameters meet a first un-trapped condition;

wherein the first un-trapped condition comprises: the transfer case gear information indicates that the target vehicle is in a secondary driving mode, and the rotating speed difference between the wheel speed of the front wheel and the wheel speed of the rear wheel is larger than a preset rotating speed difference threshold value.

In some embodiments, the first unsalvage condition further comprises a front wheel speed being less than a predetermined wheel speed value.

In some embodiments, the preset unsalable condition includes a second unsalable condition, and the information determining unit is specifically configured to: if the target differential lock is a rear axle differential lock and a front axle differential lock, determining the expected torque of the target vehicle according to the accelerator pedal information, and determining that the target vehicle is not trapped when the vehicle operation parameters meet a second non-trapping condition;

wherein the second un-trapped condition comprises: the transfer gear information indicates that the target vehicle is in a four-wheel drive mode and that a torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

In some embodiments, the information determining unit, which determines the desired torque of the target vehicle based on the accelerator pedal information, includes:

and searching the torque corresponding to the accelerator pedal information from a pre-stored corresponding relation table, and determining the searched torque as the expected torque, wherein the corresponding relation table is used for describing the corresponding relation between the accelerator pedal information and the torque.

In some embodiments, the control execution unit is specifically configured to: and when the target vehicle is trapped and the vehicle speed of the target vehicle is greater than a preset speed threshold value, controlling the target differential lock to unlock.

In a third aspect, an embodiment of the present application provides a vehicle, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of any one of the differential lock control methods when executing the computer program.

In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, where a computer program is stored, and the computer program, when executed by a processor, implements the steps of any one of the differential lock control methods described above.

In a fifth aspect, embodiments of the present application provide a computer program product, when the computer program product runs on a vehicle, causing the vehicle to execute any one of the differential lock control methods described above.

Compared with the related art, the embodiment of the application has the beneficial effects that: after the differential lock is locked, whether the vehicle is trapped by the vehicle operation parameters corresponding to the locked differential lock and the preset conditions without trapping is judged, and the locked differential lock is automatically unlocked under the condition that the vehicle is trapped by trapping, so that the driving experience and the driving safety of a user are improved.

It is understood that the beneficial effects of the second aspect to the fifth aspect can be referred to the related description of the first aspect, and are not described herein again.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

FIG. 1 is a schematic flow chart of a differential lock control method provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a differential lock provided in an embodiment of the present application;

FIG. 3 is a schematic view illustrating the control principle of a differential lock according to an embodiment of the present disclosure;

FIG. 4 is a schematic structural diagram of a differential lock control device provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of a vehicle according to an embodiment of the present application.

Detailed Description

In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should also be understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

As used in this specification and the appended claims, the term "if" may be interpreted contextually as "when", "upon" or "in response to" determining "or" in response to detecting ". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".

Furthermore, in the description of the present application and the appended claims, the terms "first," "second," "third," and the like are used for distinguishing between descriptions and not necessarily for describing a relative importance or importance.

Reference throughout this specification to "one embodiment" or "some embodiments," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the present application. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," or the like, in various places throughout this specification are not necessarily all referring to the same embodiment, but rather "one or more but not all embodiments" unless specifically stated otherwise. The terms "comprising," "including," "having," and variations thereof mean "including, but not limited to," unless expressly specified otherwise.

In order to explain the technical means of the present application, the following examples are given below.

Example one

Referring to fig. 1, an embodiment of the present application provides a differential lock control method, which may include the following steps 101 to 103 as shown in fig. 1.

Step 101, when a target differential lock of a target vehicle is locked, vehicle operation parameters corresponding to the target differential lock are obtained.

The target vehicle may be any of various vehicles. The target differential lock is typically a differential lock on the target vehicle. In practice, when only the rear axle differential lock is provided on the target vehicle, the target differential lock may be a rear axle differential lock. When the target vehicle is simultaneously provided with the front axle differential lock and the rear axle differential lock, the target differential lock can be a rear axle differential lock, or a rear axle differential lock and a front axle differential lock.

The vehicle operation parameters are parameters during the operation of the vehicle. In practice, the vehicle operating parameters may include transfer gear information, front wheel speeds of the vehicle, rear wheel speeds of the vehicle, and the like. The transfer gear information is used for indicating a driving mode of the target vehicle. The indicated drive mode is different when the transfer gear is in different gear positions. The wheel speed of the front wheel is the rotating speed of the front wheel. The rear wheel speed is the rotational speed of the rear wheel. In practice, the wheel speed of the front wheel is usually the average rotational speed of the two front wheels. The rear wheel speed is typically the average speed of the two rear wheels.

In the present embodiment, the execution subject of the differential lock control method described above is generally a vehicle, and may specifically be a controller for controlling a differential lock in a vehicle.

In practice, during the travel of the subject vehicle, the user can perform the locking operation and the unlocking operation of the switch of the differential lock provided on the subject vehicle. The above-described locking operation is usually an operation for locking the differential lock. The above-described unlocking operation is generally an operation for unlocking the differential lock. As an example, the above-described locking operation may be realized as an operation of pressing down the differential lock switch, and the above-described unlocking operation may be realized as an operation of pressing up the differential lock switch. The present embodiment does not limit the specific operations corresponding to the locking operation and the unlocking operation. When a user performs a locking operation on a switch of the differential lock, the execution body may detect the locking operation through a sensor, and lock the differential lock.

In the case where the target differential lock in the target vehicle is locked, the execution body may learn the locked differential lock, and acquire the vehicle running parameter corresponding to the locked differential lock. As an example, the vehicle operating parameter may be obtained from a corresponding sensor on the target vehicle, for example, the rotation speed of the front wheel, i.e. the wheel speed of the front wheel, may be obtained from a rotation speed sensor at the front wheel of the target vehicle.

In practical application, when the target differential lock is a rear axle differential lock, the vehicle operation parameters corresponding to the target differential lock may be transfer case gear information, a front wheel speed and a rear wheel speed. When the target differential lock is a front axle differential lock and a rear axle differential lock, the vehicle operation parameters corresponding to the target differential lock can be transfer case gear information, engine torque and accelerator pedal information. The accelerator pedal information is generally used to indicate the accelerator depth, and the torque of the vehicle engine is generally larger and the vehicle speed is faster as the accelerator depth is deeper. In practice, vehicle speed generally refers to the average rotational speed of each drive wheel. Here, in the case where different differential locks are locked, whether the vehicle is out of the way is determined by using the vehicle operation parameter corresponding to the locked differential lock, which is helpful to achieve more flexible and accurate determination of whether the vehicle is out of the way.

Fig. 2 is a schematic structural diagram of a differential lock according to an embodiment of the present application. As shown in fig. 2, the differential lock may include a housing, thrust washers, a lock gear, a lock ring, a cam plate, a solenoid, a push rod, a planetary gear, a spherical washer, and a return spring. In practice, when one wheel of the vehicle slips, the driver may press the lock control switch of the differential lock, and the differential lock control unit in the vehicle for controlling the differential lock may drive the solenoid when it is determined that it is currently appropriate to lock the differential lock. After the electromagnetic coil is electrified, the cam disc is attracted by electromagnetic force, the push rod is pushed to slide along with the rotation of the differential mechanism, the push rod pushes the locking ring, an internal spline of the locking ring is matched and locked with an external spline of the locking gear, an external spline of the locking ring is matched with a groove of a shell of the differential mechanism, and the locking ring locks the left locking gear and the shell of the differential mechanism into a whole, so that the whole differential mechanism is locked. Therefore, the vehicle loses the differential function, and the power is transmitted to the effective wheel side, namely to the non-slipping wheel side, so that the vehicle is taken out of the position.

Fig. 3 is a schematic view illustrating an operating principle of a differential lock according to an embodiment of the present application. As shown in fig. 3, the differential lock control unit for controlling the differential lock inputs current to the solenoid coil, which generates electromagnetic force that prevents the cam plate from rotating, and then the push rod presses the lock ring in, thereby locking the differential lock. In addition, after the differential lock control unit cuts off the current of the electromagnetic coil, the electromagnetic coil loses the electromagnetic force, at this time, the return spring pushes out the locking ring, and the differential lock is opened, namely, the differential lock is unlocked.

And 102, judging whether the target vehicle is trapped or not according to the vehicle operation parameters and the preset trapped-free conditions.

The preset unsmooth escape condition is a condition which is usually preset and used for indicating that the vehicle is not out of the stranded state. As an example, the preset un-trapped condition may be: the wheel speed of the front wheel is smaller than a preset wheel speed value, and the rotating speed difference between the wheel speed of the front wheel and the wheel speed of the rear wheel is larger than a preset threshold value.

Here, the execution subject may analyze the vehicle operation parameter based on a preset non-stranded condition, so as to determine whether the target vehicle is stranded. For example, if the predetermined unsalvage condition is that the difference between the rear wheel speed and the front wheel speed is greater than a predetermined threshold, for example, greater than 60 revolutions per minute (rpm), the executing body may determine that the target vehicle is not stranded when the difference between the rear wheel speed and the front wheel speed of the target vehicle is greater than the predetermined threshold.

And 103, controlling the target differential lock to unlock when the target vehicle is out of the trouble.

Here, the execution subject described above may control the target differential lock to be automatically unlocked in a case where it is determined that the target vehicle has got out of trouble. In practice, the execution main body may send an unlocking instruction to a differential lock control unit for controlling the target differential lock, so as to control the target differential lock to be automatically unlocked through the differential lock control unit. The unlocking instruction is used for indicating unlocking of the target differential lock.

According to the method provided by the embodiment, after the differential lock is locked, whether the vehicle is trapped or not is judged through the vehicle operation parameters corresponding to the locked differential lock and the preset conditions of not trapping, and the locked differential lock is automatically unlocked under the condition that the vehicle is trapped, so that the driving experience and the driving safety of a user are improved.

In some optional implementation manners of this embodiment, in step 101, the obtaining the vehicle operation parameter corresponding to the target differential lock may include: and when the target differential lock is a rear axle differential lock, acquiring the gear information of the transfer case, the wheel speed of the front wheel and the wheel speed of the rear wheel.

At this time, the above-mentioned vehicle operation parameters may include transfer gear information, front wheel speed, and rear wheel speed.

The transfer gear information is used for indicating a driving mode of the target vehicle. The indicated drive mode is different when the transfer gear is in different gear positions. The wheel speed of the front wheel is the rotating speed of the front wheel. The rear wheel speed is the rotational speed of the rear wheel. In practice, the wheel speed of the front wheel is usually the average rotational speed of the two front wheels. The rear wheel speed is typically the average speed of the two rear wheels.

In the situation that different differential locks are locked, the vehicle running parameters corresponding to the locked differential locks are adopted to analyze the situation of getting rid of the difficulty of the target vehicle, so that whether the vehicle gets rid of the difficulty or not can be judged more flexibly and accurately.

In some implementations, in the step 102, when the preset non-escaping condition includes a first non-escaping condition, the determining whether the target vehicle is escaping from the vehicle according to the vehicle operation parameter and the preset non-escaping condition may include: and if the target differential lock is the rear axle differential lock, determining that the target vehicle is not trapped when the vehicle operation parameters meet the first non-trapped condition. In this implementation, when the vehicle operation parameter does not satisfy the first un-trapped condition, it may be determined that the target vehicle has been trapped.

Wherein the first un-trapped condition comprises: the transfer case gear information indicates that the target vehicle is in a secondary driving mode, and the rotating speed difference between the wheel speed of the front wheel and the wheel speed of the rear wheel is larger than a preset rotating speed difference threshold value.

The preset speed difference threshold is usually a preset value, and may be 50rpm, for example.

In practice, when the target differential lock is a rear axle differential lock and the target vehicle is in the two-drive mode, the drive wheels of the target vehicle are rear wheels. At this time, if the wheel speed of the rear wheel is significantly higher than that of the front wheel, it indicates that the rear wheel of the target vehicle is slipping, that is, the target vehicle is not trapped yet.

According to the embodiment, whether the target vehicle is trapped can be accurately and effectively judged under the condition that the target differential lock is the rear axle differential lock.

In some implementations, the first unsalvaged condition may also include a front wheel speed being less than a preset wheel speed value. The preset wheel speed is usually a preset wheel speed, and may be 5rpm, for example. In practice, the preset wheel speed value is usually small.

Here, when the first unsalvage-free condition further includes that the wheel speed of the front wheel is less than the preset wheel speed value, the first unsalvage-free condition may be: the target vehicle is in a secondary driving mode, the rotating speed difference between the wheel speed of the front wheel and the wheel speed of the rear wheel is larger than a preset rotating speed difference threshold value, and the wheel speed of the front wheel is smaller than a preset wheel speed value.

Here, when the vehicle can continue to travel forward on slippery road conditions, the vehicle is generally considered to be out of position, for example, if the vehicle can continue to travel forward in mud, it is indicated that the vehicle is out of position. Therefore, whether the vehicle is trapped or not is judged only by the wheel speed difference between the front wheel and the rear wheel, a situation of misjudgment may exist, the wheel speed of the front wheel is considered in the first trapped-free condition, and the situation of misjudgment can be avoided, so that whether the target vehicle is trapped or not is judged more accurately and effectively.

In an optional implementation manner of some embodiments, in the step 101, the obtaining a vehicle operation parameter corresponding to the target differential lock may include: and when the target differential lock is a rear axle differential lock and a front axle differential lock, acquiring gear information of the transfer case, engine torque and accelerator pedal information.

At this time, the vehicle operation parameters may include transfer gear information, engine torque, and accelerator pedal information.

Wherein the transfer gear information is used to indicate a driving mode of the target vehicle. The indicated drive mode is different when the transfer gear is in different gear positions. The accelerator pedal information is typically used to indicate the accelerator depth, and the vehicle speed increases as the accelerator depth increases.

In the situation that different differential locks are locked, vehicle running parameters corresponding to the locked differential locks are adopted to analyze the situation of getting rid of the poverty of the target vehicle, and therefore the situation that whether the vehicle gets rid of the poverty or not can be judged more flexibly and accurately.

In some implementations, in the step 102, when the preset non-escaping condition includes a second non-escaping condition, the determining whether the target vehicle is escaping from the vehicle according to the vehicle operation parameter and the preset non-escaping condition may include: and if the target differential lock is a rear axle differential lock and a front axle differential lock, determining the expected torque of the target vehicle according to the accelerator pedal information, and determining that the target vehicle is not trapped when the vehicle operation parameters meet a second non-trapping condition. In this implementation, when the vehicle operating parameter does not satisfy the second unsalvage condition, it may be determined that the target vehicle has been taken out of the way.

Wherein the second un-trapped condition comprises: the transfer gear information indicates that the target vehicle is in a four-wheel drive mode and a torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

The desired torque is generally an engine torque corresponding to accelerator pedal information. The predetermined torque difference threshold is typically a predetermined value, and may be, for example, 50 newton meters (n.m).

Here, there is generally a mapping between the throttle depth indicated by the throttle pedal information and the desired torque of the engine. For example, the engine torque may correspond to 150n.m at an accelerator pedal depth of 20%, and 200n.m at an accelerator pedal depth of 40%. Therefore, the executing body may find the corresponding expected torque from the mapping relationship by using the accelerator depth indicated by the accelerator pedal information. Then, the execution body may determine the getting-out-of-trouble condition of the target vehicle using the obtained desired torque and the actual torque of the engine.

In practice, when the target differential lock is a front axle differential lock and a rear axle differential lock, and the target vehicle is in the four-wheel drive mode, the drive wheels of the target vehicle are front wheels and rear wheels. At this time, the four wheels are driven to rotate by the engine. During the running process of the vehicle, if the actual torque of the engine is obviously smaller than the expected torque corresponding to the depth of the accelerator pedal, it indicates that one or more wheels of the target vehicle may slip, that is, the target vehicle is not trapped yet.

The embodiment can realize accurate and effective judgment on whether the target vehicle is trapped or not under the condition that the target differential lock is the front axle differential lock and the rear axle differential lock.

In some implementations, the determining the desired torque of the target vehicle from the accelerator pedal information as described above may include: and searching the torque corresponding to the accelerator pedal information from a pre-stored corresponding relation table, and determining the searched torque as the expected torque.

The corresponding relation table is used for describing the corresponding relation between the accelerator pedal information and the torque. As an example, the accelerator pedal information may correspond to a torque of 300n.m. at 60%; the accelerator pedal information may correspond to a torque of 500n.m. at 100%.

Here, the execution body may directly find a torque corresponding to the current accelerator pedal information from the correspondence table, and determine the found torque as the desired torque. The method is simple to operate, convenient to implement and beneficial to improving the data processing efficiency.

In an optional implementation manner of each embodiment, the differential lock control method may further include the following steps: and when the target vehicle is not trapped, the control target differential lock is not unlocked.

Here, when the target vehicle has not got rid of poverty, do not unblock the target differential lock, can further ensure user's driving experience and driving safety.

In an optional implementation manner of each embodiment, in the step 103, the controlling the target differential lock to unlock when the target vehicle has got rid of the trouble may include: and when the target vehicle is trapped and the vehicle speed of the target vehicle is greater than a preset speed threshold value, controlling the target differential lock to unlock.

The preset speed threshold is usually a preset speed value, and may be, for example, 40 kilometers per hour (km/h).

In practice, the target differential lock is automatically unlocked under the condition that the target vehicle is determined to be out of position and the vehicle speed of the target vehicle is greater than the preset speed threshold value, so that the driving force of the vehicle in low-speed running can be guaranteed, the running safety of the vehicle can be guaranteed, and the driving experience and the driving safety of a user can be further improved.

Example two

Fig. 4 shows a block diagram of a differential lock control device 400 provided in the embodiment of the present application, which corresponds to the differential lock control method in the above embodiment. Referring to fig. 4, the apparatus includes an information acquisition unit 401, an information determination unit 402, and a control execution unit 403.

An information acquisition unit 401 for acquiring a vehicle running parameter corresponding to a target differential lock of a target vehicle when the target differential lock is locked;

an information determination unit 402, configured to determine whether the target vehicle has got rid of the difficulty according to the vehicle operation parameter and a preset condition of not getting rid of the difficulty;

and a control execution unit 403 for controlling the target differential lock to unlock when the target vehicle has got out of trouble.

In some embodiments, when the target differential lock is a rear axle differential lock, the vehicle operation parameters corresponding to the target differential lock include transfer case gear information, a front wheel speed, and a rear wheel speed;

when the target differential lock is a rear axle differential lock and a front axle differential lock, the vehicle operation parameters corresponding to the target differential lock comprise transfer case gear information, engine torque and accelerator pedal information.

In some embodiments, the predetermined unsafety condition includes a first unsafety condition, and the information determining unit 402 is specifically configured to: if the target differential lock is a rear axle differential lock, determining that the target vehicle is not trapped when the vehicle operation parameters meet a first non-trapped condition;

wherein the first un-trapped condition comprises: the transfer case gear information indicates that the target vehicle is in a secondary driving mode, and the rotating speed difference between the wheel speed of the front wheel and the wheel speed of the rear wheel is larger than a preset rotating speed difference threshold value.

In some embodiments, the first unsalvage condition further comprises a front wheel speed being less than a predetermined wheel speed value.

In some embodiments, the preset unsalable condition includes a second unsalable condition, and the information determining unit 402 is specifically configured to: if the target differential lock is a rear axle differential lock and a front axle differential lock, determining the expected torque of the target vehicle according to the accelerator pedal information, and determining that the target vehicle is not trapped when the vehicle operation parameters meet a second non-trapped condition;

wherein the second un-trapped condition comprises: the transfer gear information indicates that the target vehicle is in a four-wheel drive mode and a torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

In some embodiments, the determining the desired torque of the target vehicle according to the accelerator pedal information in the information determining unit 402 includes:

and searching the torque corresponding to the accelerator pedal information from a pre-stored corresponding relation table, and determining the searched torque as the expected torque, wherein the corresponding relation table is used for describing the corresponding relation between the accelerator pedal information and the torque.

In some embodiments, the control execution unit 403 is specifically configured to: and when the target vehicle is trapped and the vehicle speed of the target vehicle is greater than a preset speed threshold value, controlling the target differential lock to unlock.

The device that this embodiment provided, after the differential lock is locked, judge whether the vehicle has got rid of poverty through the vehicle operation parameter that corresponds with the differential lock that is locked and predetermine not get rid of poverty the condition to and just carry out automatic unblock to the differential lock that is locked under the condition that the vehicle has got rid of poverty, help improving user's driving experience and driving safety.

It should be noted that, for the information interaction, execution process, and other contents between the above-mentioned devices/units, the specific functions and technical effects thereof are based on the same concept as those of the embodiment of the method of the present application, and specific reference may be made to the part of the embodiment of the method, which is not described herein again.

EXAMPLE III

Fig. 5 is a schematic structural diagram of a vehicle 500 according to an embodiment of the present application. As shown in fig. 5, the vehicle 500 of the embodiment includes: at least one processor 501 (only one processor is shown in fig. 5), a memory 502, and a computer program 503, such as a differential lock control program, stored in the memory 502 and executable on the at least one processor 501. The steps in any of the various method embodiments described above are implemented when the processor 501 executes the computer program 503. The steps in the embodiments of the differential lock control methods described above are implemented when the processor 501 executes the computer program 503. The processor 501, when executing the computer program 503, implements the functions of each module/unit in each apparatus embodiment described above, such as the functions of the information acquisition unit 401, the information determination unit 402, and the control execution unit 403 shown in fig. 4.

Illustratively, the computer program 503 may be partitioned into one or more modules/units, which are stored in the memory 502 and executed by the processor 501 to accomplish the present application. One or more of the modules/units may be a series of computer program instruction segments capable of performing specific functions that describe the execution of the computer program 503 in the vehicle 500. For example, the computer program 503 may be divided into an information obtaining unit, an information determining unit, and a control executing unit, and specific functions of each unit are described in the foregoing embodiments, and are not described herein again.

The vehicle 500 may include, but is not limited to, a processor 501, a memory 502. Those skilled in the art will appreciate that fig. 5 is merely an example of a vehicle 500 and does not constitute a limitation of vehicle 500, and may include more or fewer components than shown, or some components in combination, or different components, e.g., the vehicle may also include input-output devices, network access devices, buses, etc.

The Processor 501 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.

The memory 502 may be an internal storage unit of the vehicle 500, such as a hard disk or memory of the vehicle 500. The memory 502 may also be an external storage device of the vehicle 500, such as a plug-in hard disk provided on the vehicle 500, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), and the like. Further, the memory 502 may also include both internal storage units and external storage devices 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 may also be used to temporarily store data that has been output or is to be output.

It should be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional units and modules is only used for illustration, and in practical applications, the above function distribution may be performed by different functional units and modules as needed, that is, the internal structure of the device is divided into different functional units or modules, so as to perform all or part of the above described functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only used for distinguishing one functional unit from another, and are not used for limiting the protection scope of the present application. For the specific working processes of the units and modules in the system, reference may be made to the corresponding processes in the foregoing method embodiments, which are not described herein again.

In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiments provided in the present application, it should be understood that the disclosed apparatus/vehicle and method may be implemented in other ways. For example, the above-described device/vehicle embodiments are merely illustrative, and for example, a division of modules or units is merely a logical division, and an actual implementation may have another division, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, and may be in an electrical, mechanical or other form.

Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit may be implemented in the form of hardware, or may also be implemented in the form of a software functional unit.

The integrated module, if implemented in the form of a software functional unit and sold or used as a separate product, may be stored in a computer readable storage medium. The computer readable storage medium may be non-volatile or volatile. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying computer program code, recording medium, U.S. disk, removable hard disk, magnetic diskette, optical disk, computer Memory, read-Only Memory (ROM), random Access Memory (RAM), electrical carrier wave signal, telecommunications signal, software distribution medium, etc. It should be noted that the computer readable storage medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable storage media that does not include electrical carrier signals and telecommunications signals in accordance with legislation and patent practice.

The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. A differential lock control method, characterized in that the method comprises:

when a target differential lock of a target vehicle is locked, acquiring vehicle operation parameters corresponding to the target differential lock;

judging whether the target vehicle is out of the poverty or not according to the vehicle operation parameters and a preset non-poverty-escaping condition;

and when the target vehicle is out of the trouble, controlling the target differential lock to unlock.

2. The differential lock control method according to claim 1,

when the target differential lock is a rear axle differential lock, the vehicle operation parameters corresponding to the target differential lock comprise transfer case gear information, a front wheel speed and a rear wheel speed;

when the target differential lock is a rear axle differential lock and a front axle differential lock, the vehicle operation parameters corresponding to the target differential lock comprise transfer case gear information, engine torque and accelerator pedal information.

3. The differential lock control method according to claim 2, wherein the preset unsmooth-escape condition includes a first unsmooth-escape condition, and the determining whether the target vehicle is unsmooth-escape according to the vehicle operation parameter and the preset unsmooth-escape condition includes:

if the target differential lock is a rear axle differential lock, determining that the target vehicle is not trapped when the vehicle operation parameters meet a first non-trapped condition;

wherein the first un-stranded condition comprises: the transfer case gear information indicates that the target vehicle is in a two-wheel drive mode, and the rotation speed difference between the wheel speed of the front wheel and the wheel speed of the rear wheel is greater than a preset rotation speed difference threshold value.

4. The differential lock control method according to claim 3, wherein the first unsalvaged condition further includes the front wheel speed being less than a preset wheel speed value.

5. The differential lock control method according to claim 2, wherein the preset non-escape condition includes a second non-escape condition, and the determining whether the target vehicle has escaped from the vehicle according to the vehicle operation parameter and the preset non-escape condition includes:

if the target differential lock is a rear axle differential lock and a front axle differential lock, determining the expected torque of the target vehicle according to the accelerator pedal information, and determining that the target vehicle is not trapped when the vehicle operation parameters meet a second non-trapping condition;

wherein the second un-stranded condition comprises: the transfer gear information indicates that the target vehicle is in a four-wheel drive mode and a torque difference between the desired torque and the engine torque is greater than a preset torque difference threshold.

6. The differential lock control method according to claim 5, wherein the determining a desired torque of the target vehicle from the accelerator pedal information includes:

and searching the torque corresponding to the accelerator pedal information from a pre-stored corresponding relation table, and determining the searched torque as the expected torque, wherein the corresponding relation table is used for describing the corresponding relation between the accelerator pedal information and the torque.

7. The differential lock control method according to any one of claims 1 to 6, wherein the controlling of the target differential lock to unlock when the target vehicle has got out of trouble includes:

and when the target vehicle is trapped and the speed of the target vehicle is greater than a preset speed threshold value, controlling the target differential lock to unlock.

8. A differential lock control apparatus, characterized in that the apparatus comprises:

the system comprises an information acquisition unit, a control unit and a control unit, wherein the information acquisition unit is used for acquiring vehicle running parameters corresponding to a target differential lock of a target vehicle when the target differential lock is locked;

the information judging unit is used for judging whether the target vehicle is trapped or not according to the vehicle running parameters and a preset trapped-free condition;

and the control execution unit is used for controlling the target differential lock to unlock when the target vehicle is out of the trouble.

9. A vehicle comprising a memory, a processor and a computer program stored in the memory and executable on the processor, characterized in that the processor implements the differential lock control method according to any one of claims 1 to 7 when executing the computer program.

10. A computer-readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements the differential lock control method according to any one of claims 1 to 7.

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