Method, device, vehicle and storage medium for controlling upshifting of rear axle of vehicle

Abstract

Embodiments of the present application are suitable for the field of vehicle control technology, and provide a method and device for controlling upshift of rear axle of a vehicle, a vehicle and a storage medium. The method comprises: obtaining front axle torque of a front axle and rear axle torque of a rear axle of the vehicle during driving of the vehicle; determining overall vehicle torque of the vehicle according to the front axle torque and the rear axle torque; if the overall vehicle torque of the vehicle is within a preset torque range, determining target torque of the front axle according to the front axle torque and the rear axle torque; a maximum value of the preset torque range is less than overall vehicle torque when the rear axle normally upshifts; a sum of the target torque of the front axle and the rear axle torque is greater than or equal to the overall vehicle torque of the vehicle; and the front axle torque is increased to the target torque by a target motor in the front axle, so as to realize upshift of the rear axle of the vehicle. The above method can avoid acceleration decrease of the vehicle during upshift of the rear axle.

Description

Technical Field

[0001] This application belongs to the field of vehicle control technology, and in particular relates to a method, device, vehicle, and storage medium for controlling the upshifting of the rear axle of a vehicle. Background Technology

[0002] Currently, vehicles have become one of the most important means of transportation for people. Vehicles typically include a front axle and a rear axle. The front axle is used to transmit the forces and torques generated between the chassis and the front wheels, while the rear axle supports the wheels and connects them. Furthermore, to reduce vehicle emissions, vehicle engines usually contain catalytic converters. Catalytic converters are highly active at temperatures above 500 degrees Celsius, at which point they can effectively contact the vehicle's exhaust gases, thus purifying them.

[0003] Typically, during vehicle acceleration, the rear axle needs to upshift. This upshift reduces rear axle torque and simultaneously starts the engine. Engine startup heats the catalytic converter, increasing its activity and improving exhaust purification. To avoid overheating the catalytic converter, the engine starting torque in the front axle is usually limited, thus restricting the front axle torque. Therefore, when the rear axle upshifts, the rear axle torque decreases, and due to catalytic converter activity considerations, the front axle torque is also limited. This results in a decrease in overall vehicle torque during the rear axle upshift, consequently reducing the vehicle's acceleration. Summary of the Invention

[0004] This application provides a method, apparatus, vehicle, and storage medium for controlling the upshifting of the rear axle of a vehicle, which can solve the problem of decreased vehicle acceleration during the upshifting process.

[0005] In a first aspect, embodiments of this application provide a method for controlling the upshifting of the rear axle of a vehicle, the method comprising:

[0006] During vehicle operation, the front axle torque and rear axle torque are obtained, and the overall vehicle torque is determined based on the front axle torque and rear axle torque.

[0007] If the current vehicle's total torque is within the preset torque range, then the target torque of the front axle is determined based on the front axle torque and the rear axle torque; the maximum value of the preset torque range is less than the total torque of the vehicle when the rear axle is normally upshifting; the sum of the target torque of the front axle and the torque of the rear axle is greater than or equal to the current vehicle's total torque.

[0008] The target motor in the front axle increases the front axle torque to the target torque, thereby enabling the vehicle to upshift to the rear axle.

[0009] Secondly, embodiments of this application provide a device for controlling the upshifting of the rear axle of a vehicle, the device comprising:

[0010] The acquisition module is used to acquire the front axle torque and rear axle torque of the vehicle during vehicle operation, and determine the current vehicle torque based on the front axle torque and rear axle torque.

[0011] The determination module is used to determine the target torque of the front axle based on the front axle torque and the rear axle torque if the total torque of the current vehicle is within the preset torque range; the maximum value of the preset torque range is less than the total torque of the vehicle when the rear axle is normally upshifting; the sum of the target torque of the front axle and the torque of the rear axle is greater than or equal to the total torque of the current vehicle.

[0012] The boost module is used to boost the front axle torque to the target torque via the target motor in the front axle, so as to enable the vehicle's rear axle to shift up.

[0013] 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, wherein the processor executes the computer program to implement the method described in the first aspect above.

[0014] Fourthly, embodiments of this application provide a computer-readable storage medium storing a computer program that, when executed by a processor, implements the method described in the first aspect above.

[0015] Fifthly, embodiments of this application provide a computer program product that, when run on a vehicle, causes the vehicle to perform the method described in the first aspect.

[0016] The beneficial effects of this application embodiment compared to the prior art are as follows: During vehicle operation, the front axle torque and rear axle torque are acquired, and the overall vehicle torque is determined based on these torques. Then, when the overall vehicle torque is within a preset torque range, a target torque for the front axle is determined based on the front and rear axle torques. The target motor in the front axle then boosts the front axle torque to the target torque to perform upshifting. Because the sum of the target torque after front axle boost and the rear axle torque is greater than or equal to the overall vehicle torque during vehicle operation before rear axle upshifting, the overall vehicle torque after upshifting will not be lower than the overall vehicle torque before upshifting. This ensures that the vehicle's acceleration does not decrease during upshifting. Furthermore, because the maximum value of the preset torque range is less than the overall vehicle torque during normal rear axle upshifting, it can be determined that the overall vehicle torque after upshifting will also be less than the overall vehicle torque during normal rear axle upshifting. Therefore, the vehicle can directly boost the front axle torque based on the target motor in the front axle, without requiring the vehicle to upshift via the engine. This avoids the limitation on front axle torque caused by engine startup. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a flowchart illustrating the implementation of a method for controlling the upshifting of the rear axle of a vehicle, according to an embodiment of this application.

[0019] Figure 2 This is a schematic diagram of a device for controlling the upshifting of the rear axle of a vehicle, provided in an embodiment of this application.

[0020] Figure 3 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] Currently, during a vehicle's rear axle upshift, the rear axle torque needs to be reduced, while simultaneously starting the engine located on the front axle. By controlling the engine's operation, the front axle torque can be increased, thereby increasing the vehicle's overall torque during the rear axle upshift and thus increasing vehicle speed to facilitate the upshift. However, the engine starting on the front axle simultaneously initiates the catalytic converter heating process. Typically, to prevent overheating of the catalytic converter and to expedite the heating process, the engine torque at startup needs to be limited. This results in a limitation on the vehicle's front axle torque. In other words, during a rear axle upshift, the vehicle's rear axle torque decreases, and considering catalytic converter activity, the front axle torque is also limited. This leads to a decrease in the vehicle's overall torque during the rear axle upshift, consequently reducing the vehicle's acceleration.

[0025] Therefore, to avoid limiting the front axle torque during rear axle upshifting, thus reducing vehicle acceleration during upshifting, this application provides a method for controlling rear axle upshifting, which can also be used as a device for controlling rear axle upshifting. This device for controlling rear axle upshifting can be installed in the vehicle requiring rear axle upshifting.

[0026] For details, please refer to Figure 1 , Figure 1 The diagram illustrates a method for controlling the upshifting of the rear axle of a vehicle, according to an embodiment of this application. The method includes the following steps:

[0027] S101. During vehicle operation, obtain the front axle torque of the front axle and the rear axle torque of the vehicle, and determine the current vehicle torque based on the front axle torque and the rear axle torque.

[0028] In one embodiment, the aforementioned front axle is a device for transmitting the forces in all directions between the vehicle frame and the front wheels, and the resulting torque. The rear axle refers to the rear drive shaft component for vehicle power transmission, which can be used to support the vehicle frame, wheels, and connect the rear wheels, and transmit power from the vehicle frame to the rear wheels.

[0029] It should be noted that the aforementioned rear axle consists of two half-axles, enabling differential movement between the half-axles. If the vehicle is front-axle driven, the rear axle serves only as a follower axle, meaning it only bears the load. If the vehicle is rear-axle driven, the rear axle, in addition to bearing the load, can also provide driving, deceleration, and differential functions; these will not be elaborated upon further.

[0030] In addition, torque is a special type of moment that causes an object to rotate. Like power, torque is one of the main indicators of a vehicle, reflecting its performance. For example, vehicle performance can include acceleration, hill-climbing ability, and other characteristics. In the automotive field, the driving force that propels a vehicle is related to torque. Generally, the higher the overall torque after upshifting, the greater the acceleration, and thus the higher the driving force. The overall vehicle torque is the sum of the front axle torque and the rear axle torque.

[0031] Furthermore, the torque mentioned above is defined as the cross product of displacement and force. In physics, it refers to the force that causes an object to rotate multiplied by the distance to the axis of rotation. Therefore, the front axle torque and rear axle torque can be calculated separately based on the aforementioned parameters and then obtained by the device controlling the rear axle upshifting of the vehicle. In this way, the device controlling the rear axle upshifting of the vehicle can determine the total torque of the vehicle during operation.

[0032] It should be noted that vehicles typically operate in various modes, including acceleration, deceleration, and constant speed. For acceleration, upshifting of the rear axle is usually required. For example, the traditional method involves the engine driving the front axle, increasing vehicle speed while simultaneously increasing the torque output of the front axle and decreasing the torque output of the rear axle, thus achieving rear axle upshifting.

[0033] S102. If the current vehicle torque is within the preset torque range, the target torque of the front axle is determined based on the front axle torque and the rear axle torque. The maximum value of the preset torque range is less than the vehicle torque when the rear axle is normally upshifting. The sum of the target torque of the front axle and the torque of the rear axle is greater than or equal to the current vehicle torque.

[0034] In one embodiment, the preset torque range can be set according to actual conditions and is not limited thereto. It should be noted that the maximum value of the preset torque range should be less than the total vehicle torque during normal upshifting of the rear axle. For example, the preset torque range can be from 170 Nm to 1000 Nm.

[0035] As explained above, during upshifting, a higher vehicle torque results in greater acceleration, which in turn leads to higher driving force. Therefore, it can be assumed that with greater acceleration and driving force, the vehicle speed will also be higher. Based on this, when the maximum value of the preset torque range is less than the vehicle torque during normal upshifting of the rear axle, it can be assumed that the vehicle speed corresponding to the maximum value of the preset torque range during upshifting will also be less than the vehicle speed corresponding to the vehicle torque during normal upshifting of the rear axle.

[0036] For example, in this embodiment, when a rear axle upshift is required, the vehicle can upshift before reaching the standard speed corresponding to a normal upshift. For instance, when shifting from gear 1 to gear 2, the standard speed corresponding to a normal shift could be 130 km / h, and the speed corresponding to the maximum value of the preset torque range could be 110 km / h. In this case, the vehicle can forcibly upshift when it reaches 110 km / h.

[0037] In addition, when performing a rear axle upshift, the vehicle can first determine the corresponding preset torque range through a subsequent method. Specifically, the device controlling the vehicle's rear axle upshift can pre-obtain the target upshift point; the target upshift point is lower than the standard upshift point during normal rear axle upshifts; then, the preset torque range is determined based on the target upshift point.

[0038] The upshift point can be considered as the timing of upshifting when the vehicle is shifting gears. Specifically, the upshift point is usually determined by parameters such as vehicle speed and throttle opening. In this embodiment, the upshift point can be determined based on the vehicle speed. It should also be noted that there are usually multiple gears after upshifting; therefore, different target upshift points can be set for each gear, without limitation.

[0039] For example, when the rear axle shifts from 1st gear to 2nd gear, the standard shift point corresponding to the vehicle speed during normal shifting can be 130km / h. At this time, the target shift point can be 110km / h, which is lower than 130km / h, and there is no limitation on this.

[0040] Additionally, it should be noted that each target upshift point can correspond to a vehicle speed. Therefore, after determining the target upshift point, the device controlling the rear axle upshift of the vehicle can also directly query or calculate the corresponding preset torque range based on the vehicle speed. In this embodiment, the method of querying or calculating the corresponding preset torque range based on the vehicle speed is not limited.

[0041] It's important to note that while rear axle torque decreases and front axle torque increases during upshifting, to ensure the vehicle's acceleration doesn't decrease during upshifting, the sum of the target torque and the rear axle torque must be greater than or equal to the vehicle's current total torque. In other words, the difference between the target front axle torque and the front axle torque before upshifting must be at least greater than or equal to the torque reduction of the rear axle during upshifting.

[0042] Specifically, the device controlling the upshifting of the vehicle's rear axle can determine the amount of torque reduction in the rear axle torque based on the rear axle torque; then, the sum of the torque reduction and the front axle torque is determined as the target torque. In determining the torque reduction, the difference between the rear axle torque and a preset rear axle torque can be used as the torque reduction amount.

[0043] The preset rear axle torque can be set according to actual conditions and is not limited thereto. For example, the preset rear axle torque can be 0 Nm. That is, when a rear axle upshift is required, the value of the rear axle torque is the amount of torque reduction during upshifting. Then, the sum of the torque reduction and the front axle torque can be determined as the target torque. Since the rear axle torque will decrease to 0 during upshifting, the target torque can be considered as the vehicle's total torque during upshifting. In other words, the sum of the target torque and the rear axle torque during upshifting will equal the current total torque of the vehicle. This ensures that the vehicle's acceleration does not decrease during upshifting and that the acceleration does not change abruptly during upshifting.

[0044] S103. The front axle torque is increased to the target torque by the target motor in the front axle, so as to realize the upshift of the vehicle's rear axle.

[0045] In one embodiment, since the maximum value of the preset torque range is less than the total vehicle torque during normal upshifting of the rear axle, it can be determined that the total vehicle torque after upshifting will also be less than the total vehicle torque during normal upshifting of the rear axle. Therefore, the vehicle can directly increase the front axle torque based on the target motor in the front axle, without requiring the vehicle to upshift via the engine. This avoids limiting the front axle torque when the engine starts.

[0046] Specifically, when the front axle torque is increased to the target torque via the target motor, the device controlling the rear axle upshift of the vehicle can determine the first rotational speed of the target shaft in the front axle corresponding to the target torque; determine the second rotational speed of the target motor based on the first rotational speed; and control the target motor to rotate at the second rotational speed, thereby driving the target shaft to rotate at the first rotational speed. Furthermore, the torque generated by the target motor during operation can be transmitted to the front axle via the target shaft, thereby increasing the front axle torque to the target torque.

[0047] In one embodiment, when the vehicle is a hybrid-powered vehicle, it can be driven not only by an engine but also by an electric motor. The electric motors are typically located on both the front and rear axles. In a rear-axle driven vehicle, the rear axle motor can generate driving force to the rear wheels. In a front-axle driven vehicle, the front axle can also generate driving force to the front wheels via a front axle motor.

[0048] For example, the target motor mentioned above can be considered as the front axle motor located on the front axle of the vehicle. Specifically, the target motor can be the P2 motor in the vehicle. Here, "P" in "P2 motor" indicates the position of the target motor in the hybrid drive system, and "2" indicates that this position is specifically located between the vehicle's transmission and engine, and after the vehicle's clutch. It is understood that because a clutch is provided between the P2 motor and the engine, the P2 motor can independently drive the front wheels of the vehicle, achieving a pure electric driving mode.

[0049] In one embodiment, the target shaft is the input shaft of the clutch in the vehicle. A clutch is a device that transmits engine power from a vehicle or other power machinery to an axle in a switching manner. Typically, the clutch is installed between the engine and the transmission, and is an assembly in the vehicle's drivetrain directly connected to the engine. It can drive the front wheels of the vehicle via its input shaft. The functions of the clutch include, but are not limited to, shifting gears and preventing overload of the vehicle's drivetrain, which will not be described in detail here.

[0050] In one embodiment, different first rotational speeds can generate different torques when the target shaft rotates. Therefore, the vehicle can pre-store the first rotational speed corresponding to each target torque so that the device controlling the rear axle upshifting of the vehicle can determine the first rotational speed corresponding to the current target torque at any time.

[0051] It should be noted that, as explained above regarding the target motor, the P2 motor is located after the clutch. Therefore, if it is necessary to control the target motor to drive the target shaft at a first speed so that the torque generated by the target motor during operation can be transmitted to the front axle through the target shaft, the speed of the target motor needs to be set.

[0052] Specifically, the device for controlling the upshifting of the rear axle of the vehicle can determine a target speed range based on a first speed and a preset speed difference; wherein, the difference between any speed in the target speed range and the first speed is less than or equal to the preset speed difference; then, any speed in the target speed range is determined as the second speed.

[0053] The preset speed difference can be set in advance according to actual conditions. For example, a preset speed difference threshold can be preset in the device controlling the rear axle upshift of the vehicle. Then, any value less than the preset speed difference threshold can be determined as the preset speed difference. In this embodiment, the preset speed difference can be 0. That is, when it is necessary to adjust the motor speed, the second speed of the target motor should be equal to the first speed.

[0054] It is understandable that when the preset speed difference is other values, the second speed of the target motor can be greater than or less than the first speed. That is, the second speed determined in this case should be a target speed range. Subsequently, the device controlling the rear axle upshift of the vehicle can determine any speed within this target speed range as the second speed, without limitation.

[0055] Specifically, when any speed within the target speed range is defined as the second speed, it can be considered that the second speed is close to the first speed. Therefore, when the target motor has the same speed as the input shaft, it can engage with the input shaft. Furthermore, the torque generated by the target motor during operation can be transmitted to the front axle through the target shaft to increase the front axle torque to the target torque.

[0056] It should be added that the above adjustment method involves adjusting the motor speed of the target motor. It is understood that, in another embodiment, the device controlling the rear axle upshift of the vehicle can also adjust the first speed. For example, the device controlling the rear axle upshift of the vehicle can also pre-determine the first speed of the target motor corresponding to the target torque. Then, based on the first speed and the speed difference, a second speed of the target shaft is determined; this is not limited.

[0057] It should be noted that when the vehicle's overall torque is within the preset torque range, that is, during the rear axle upshift, the device controlling the rear axle upshift should stop the engine in the front axle from operating. As explained in S103 above, during the rear axle upshift, the vehicle should increase the front axle torque through the target motor in the front axle, rather than through engine operation. This avoids limiting the front axle torque when the engine starts, as this requires heating the catalytic converter, which would otherwise reduce the vehicle's overall torque during the rear axle upshift and decrease acceleration.

[0058] In this embodiment, during vehicle operation, the front axle torque and rear axle torque are acquired, and the overall vehicle torque is determined based on these torques. Then, when the overall vehicle torque is within a preset torque range, a target torque for the front axle is determined based on the front and rear axle torques. The target motor in the front axle then boosts the front axle torque to the target torque to perform upshifting. Because the sum of the boosted target torque and the rear axle torque is greater than or equal to the overall vehicle torque during vehicle operation before upshifting, the overall vehicle torque after upshifting will not be lower than the torque before upshifting. This ensures that the vehicle's acceleration does not decrease during upshifting. Furthermore, since the maximum value of the preset torque range is less than the overall vehicle torque during normal upshifting of the rear axle, it can be determined that the overall vehicle torque after upshifting will also be less than the torque during normal upshifting of the rear axle. Therefore, the vehicle can directly boost the front axle torque based on the target motor in the front axle, without requiring the vehicle to upshift via the engine. This avoids the limitation on front axle torque caused by engine startup.

[0059] Please see Figure 2 , Figure 2This is a structural block diagram of a device for controlling the upshifting of the rear axle of a vehicle, provided in an embodiment of this application. The device for controlling the upshifting of the rear axle of a vehicle in this embodiment includes modules for performing... Figure 1 The steps in the corresponding embodiments. Please refer to the details. Figure 1 as well as Figure 1 The relevant descriptions in the corresponding embodiments are shown below. For ease of explanation, only the parts relevant to this embodiment are shown. See also... Figure 2 The device 200 for controlling the upshifting of the rear axle of the vehicle may include: an acquisition module 210, a determination module 220, and an lifting module 230, wherein:

[0060] The acquisition module 210 is used to acquire the front axle torque of the front axle and the rear axle torque of the vehicle during vehicle operation, and determine the current vehicle torque based on the front axle torque and the rear axle torque.

[0061] The determination module 220 is used to determine the target torque of the front axle based on the front axle torque and the rear axle torque if the total torque of the current vehicle is within the preset torque range; the maximum value of the preset torque range is less than the total torque of the vehicle when the rear axle is normally upshifting; the sum of the target torque of the front axle and the torque of the rear axle is greater than or equal to the total torque of the current vehicle.

[0062] The boost module 230 is used to boost the front axle torque to the target torque via the target motor in the front axle, so as to realize the upshift of the vehicle's rear axle.

[0063] In one embodiment, the determining module 220 is further configured to:

[0064] The amount of torque reduction of the rear axle is determined based on the rear axle torque; the sum of the torque reduction and the front axle torque is determined as the target torque.

[0065] In one embodiment, the determining module 220 is further configured to:

[0066] The difference between the rear axle torque and the preset rear axle torque is defined as the torque reduction.

[0067] In one embodiment, the lifting module 230 is further configured to:

[0068] Determine the first rotational speed of the target shaft in the front axle corresponding to the target torque; determine the second rotational speed of the target motor based on the first rotational speed; control the target motor to rotate at the second rotational speed so as to drive the target shaft to rotate at the first rotational speed.

[0069] In one embodiment, the lifting module 230 is further configured to:

[0070] Based on the first speed and the preset speed difference, a target speed range is determined; the difference between any speed in the target speed range and the first speed is less than or equal to the preset speed difference; any speed in the target speed range is determined as the second speed.

[0071] In one embodiment, the device 200 for controlling the upshifting of the rear axle of the vehicle further includes:

[0072] The target upshift point acquisition module is used to acquire the target upshift point when the rear axle shifts up; the target upshift point is lower than the standard upshift point when the rear axle shifts up normally.

[0073] The preset torque range determination module is used to determine the preset torque range based on the target upshift point.

[0074] In one embodiment, the determining module 220 is further configured to:

[0075] If the current vehicle torque is within the preset torque range, the engine in the front axle is controlled to stop working, and the target torque of the front axle is determined based on the torque of the front axle and the torque of the rear axle.

[0076] When it is understood that, Figure 2 The block diagram shown illustrates the structure of the device for controlling the rear axle upshifting of a vehicle. Each module is used to perform... Figure 1 The steps in the corresponding embodiments, and for Figure 1 The steps in the corresponding embodiments have been explained in detail in the above embodiments. Please refer to them for details. Figure 1 The relevant descriptions in the corresponding embodiments will not be repeated here.

[0077] Figure 3 This is a structural block diagram of a vehicle provided in one embodiment of this application. For example... Figure 3 As shown, the vehicle 300 in this embodiment includes a processor 310, a memory 320, and a computer program 330 stored in the memory 320 and executable on the processor 310, such as a program for controlling the rear axle upshifting of the vehicle. When the processor 310 executes the computer program 330, it implements the steps in the various embodiments of the methods for controlling the rear axle upshifting of the vehicle described above, for example... Figure 1 S101 to S103 are shown. Alternatively, the processor 310 implements the above when executing the computer program 330. Figure 2 The functions of each module in the corresponding embodiments, for example, Figure 2 For details on the functions of modules 210 to 230 shown, please refer to [link / reference]. Figure 2 The relevant descriptions in the corresponding embodiments.

[0078] For example, the computer program 330 can be divided into one or more modules, one or more of which are stored in the memory 320 and executed by the processor 310 to implement the method for controlling the rear axle upshifting of a vehicle provided in the embodiments of this application. One or more modules can be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program 330 in the vehicle 300. For example, the computer program 330 can implement the method for controlling the rear axle upshifting of a vehicle provided in the embodiments of this application.

[0079] Vehicle 300 may include, but is not limited to, processor 310 and memory 320. Those skilled in the art will understand that... Figure 3 This is merely an example of vehicle 300 and does not constitute a limitation on vehicle 300. 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.

[0080] The processor 310 may be a central processing unit, or it may be other general-purpose processors, digital signal processors, application-specific integrated circuits, off-the-shelf programmable gate arrays or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor, etc.

[0081] The memory 320 can be an internal storage unit of the vehicle 300, such as a hard drive or memory of the vehicle 300. The memory 320 can also be an external storage device of the vehicle 300, such as a plug-in hard drive, smart memory card, flash memory card, etc., equipped on the vehicle 300. Furthermore, the memory 320 can include both internal storage units and external storage devices of the vehicle 300.

[0082] This application provides a computer-readable storage medium, 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 method for controlling the rear axle to upshift as described in the various embodiments above.

[0083] This application provides a computer program product that, when run on a vehicle, causes the vehicle to execute the methods for controlling the rear axle to shift up in the above embodiments.

[0084] 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 method for controlling the upshifting of the rear axle of a vehicle, characterized in that, The method includes: During the vehicle's operation, the front axle torque and the rear axle torque of the vehicle are acquired, and the current total torque of the vehicle is determined based on the front axle torque and the rear axle torque. If the current total torque of the vehicle is within a preset torque range, then the target torque of the front axle is determined based on the front axle torque and the rear axle torque; the maximum value of the preset torque range is less than the total torque of the vehicle when the rear axle is normally upshifting; the sum of the target torque of the front axle and the torque of the rear axle is greater than or equal to the current total torque of the vehicle; the vehicle speed corresponding to the maximum value of the preset torque range is less than the vehicle speed corresponding to the total torque of the vehicle when the rear axle is normally upshifting. The front axle torque is increased to the target torque by the target motor in the front axle, so as to realize the rear axle upshift of the vehicle; If the current overall torque of the vehicle is within a preset torque range, then determining the target torque of the front axle based on the front axle torque and the rear axle torque includes: If the current total torque of the vehicle is within the preset torque range, the engine in the front axle is controlled to stop working, and the target torque of the front axle is determined based on the front axle torque and the rear axle torque. Before determining the target torque of the front axle based on the front axle torque and the rear axle torque if the current total torque of the vehicle is within a preset torque range, the method further includes: Obtain the target upshift point when the rear axle shifts up; the target upshift point is lower than the standard upshift point when the rear axle normally shifts up. The preset torque range is determined based on the target upshift point.

2. The method according to claim 1, characterized in that, Determining the target torque of the front axle based on the front axle torque and the rear axle torque includes: The amount of torque reduction of the rear axle torque is determined based on the rear axle torque. The sum of the torque reduction and the front axle torque is determined as the target torque.

3. The method according to claim 2, characterized in that, The step of determining the torque reduction amount of the rear axle torque based on the rear axle torque includes: The difference between the rear axle torque and the preset rear axle torque is determined as the torque reduction amount.

4. The method according to claim 1, characterized in that, The step of increasing the front axle torque to the target torque via the target motor in the front axle includes: Determine the first rotational speed of the target shaft in the front axle corresponding to the target torque; The second speed of the target motor is determined based on the first speed. The target motor is controlled to rotate at the second speed, so as to drive the target shaft to rotate at the first speed.

5. The method according to claim 4, characterized in that, Determining the second speed of the target motor based on the first speed includes: A target speed range is determined based on the first speed and the preset speed difference; the difference between any speed in the target speed range and the first speed is less than or equal to the preset speed difference. The second speed is determined by any speed within the target speed range.

6. A device for controlling the upshifting of the rear axle of a vehicle, characterized in that, The device includes: The acquisition module is used to acquire the front axle torque of the front axle and the rear axle torque of the vehicle during the vehicle's operation, and determine the current total torque of the vehicle based on the front axle torque and the rear axle torque. The determination module is used to determine the target torque of the front axle based on the front axle torque and the rear axle torque if the current total torque of the vehicle is within a preset torque range; the maximum value of the preset torque range is less than the total torque of the vehicle when the rear axle is normally upshifting; the sum of the target torque of the front axle and the torque of the rear axle is greater than or equal to the current total torque of the vehicle; and the vehicle speed corresponding to the maximum value of the preset torque range is less than the vehicle speed corresponding to the total torque of the vehicle when the rear axle is normally upshifting. The boosting module is used to boost the torque of the front axle to the target torque via the target motor in the front axle, so as to realize the upshifting of the rear axle of the vehicle; The determination module is also used for: If the current total torque of the vehicle is within the preset torque range, the engine in the front axle is controlled to stop working, and the target torque of the front axle is determined based on the front axle torque and the rear axle torque. The device also includes: The target upshift point acquisition module is used to acquire the target upshift point when the rear axle upshifts; the target upshift point is lower than the standard upshift point when the rear axle normally upshifts; A preset torque range determination module is used to determine the preset torque range based on the target upshift point.

7. 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 method as described in any one of claims 1 to 5.

8. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 5.

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