CN113911099B

CN113911099B - Low-speed four-wheel drive mode control method and device, storage medium and electronic equipment

Info

Publication number: CN113911099B
Application number: CN202110152916.9A
Authority: CN
Inventors: 王建
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-02-03
Filing date: 2021-02-03
Publication date: 2023-10-20
Anticipated expiration: 2041-02-03
Also published as: WO2022166499A1; CN113911099A

Abstract

The disclosure relates to a low-speed four-wheel drive mode control method, a device, a storage medium and electronic equipment, which solve the technical problem that when a transfer case of a vehicle is in a 4L mode and the vehicle speed exceeds a set vehicle speed, resonance of the vehicle or rollover occurs when the vehicle turns due to obvious steering and braking of the vehicle, so that safety accidents occur. The method comprises the following steps: acquiring a gear signal of the vehicle under the condition that a transfer case of the vehicle is 4L; acquiring the speed of the vehicle under the condition that the vehicle is in a reverse gear or a driving gear; under the condition that the vehicle speed is greater than a vehicle speed threshold value, adjusting the transfer case from 4L hard locking to intelligent locking, and acquiring the angle of a steering wheel of the vehicle; the control transfer case distributes torque of front and rear wheels of the vehicle according to the angle of the steering wheel. The torque of the front wheels and the rear wheels of the vehicle is distributed according to the angle of the steering wheel by controlling the transfer case, so that resonance when the steering braking of the vehicle is obvious and rollover when the vehicle turns are avoided, and the probability of safety accidents is reduced.

Description

Low-speed four-wheel drive mode control method and device, storage medium and electronic equipment

Technical Field

The disclosure relates to the technical field of vehicles, in particular to a low-speed four-wheel drive mode control method, a device, a storage medium and electronic equipment.

Background

The transfer case is an important component of an automobile power system, and has the main function of distributing power to a front transmission shaft and a rear transmission shaft, and transmitting torque to wheels of a vehicle through a main reduction driving shaft and a driving shaft so as to realize four-wheel drive. The driving of the transfer case comprises a high-speed driving mode, a low-speed driving mode and a neutral mode (N gear for short), wherein the high-speed driving mode comprises a four-drive mode (4 WD mode for short) and a high-speed two-drive mode (2H mode for short); the low-speed driving mode includes a low-speed four-drive mode (4L mode for short); and in the N-gear mode, the input shaft and the output shaft of the transfer case are disconnected. When the transfer case is in a 4L mode, the transfer case can amplify the output torque of the transmission by more than 2.5 times, so that the front axle and the rear axle obtain larger input torque, the dynamic property of the vehicle is improved, and the vehicle can face non-paved roads and road conditions with complex terrains from the container.

However, in the 4L mode, after the vehicle speed exceeds the set vehicle speed, the vehicle steering braking obviously causes resonance of the vehicle or rollover during turning of the vehicle, so that safety accidents are caused; when the vehicle is in reversing/advancing staggered driving or steering, the torque is always in a loading state, and the primary friction group is reversed and impacted to be abnormal sound due to the limitation of a mechanical structure, so that the transfer case and the transmission shaft are damaged, and the tires of the vehicle are seriously worn.

Disclosure of Invention

The invention aims to provide a low-speed four-wheel drive mode control method, a device, a storage medium and electronic equipment, which solve the technical problem that when a transfer case of a vehicle is in a 4L mode and the vehicle speed exceeds a set vehicle speed, resonance of the vehicle or turning of the vehicle occurs due to obvious steering and braking of the vehicle, so that safety accidents occur.

To achieve the above object, according to a first aspect of embodiments of the present disclosure, the present disclosure provides a low-speed four-wheel drive mode control method, applied to a vehicle, including:

acquiring a gear signal of the vehicle under the condition that a transfer case of the vehicle is in a low-speed four-wheel drive mode;

acquiring the speed of the vehicle under the condition that the vehicle is in a reverse gear or a driving gear;

under the condition that the vehicle speed is greater than a vehicle speed threshold value, the transfer case is adjusted from the hard locking of a low-speed four-wheel drive mode to intelligent locking, and the angle of a steering wheel of the vehicle is obtained;

and controlling the transfer case to distribute the torque of front and rear wheels of the vehicle according to the angle of the steering wheel.

Optionally, the method further comprises:

and controlling the transfer case to release torque within a preset duration when the vehicle is in neutral gear.

Optionally, the controlling the transfer case of the vehicle to distribute the torque of front and rear wheels of the vehicle according to the angle of the steering wheel includes:

and controlling the transfer case to distribute the torque of the front and rear wheels of the vehicle according to the preset relation among the angle of the steering wheel, the angle of the steering wheel and the torque of the front wheels of the vehicle, wherein the angle of the steering wheel and the torque of the front wheels of the vehicle are in inverse relation.

Optionally, the transfer case of the vehicle is a switching condition of a low-speed four-wheel drive mode, including:

and when the vehicle is in neutral gear and the vehicle speed is zero, switching the transfer case of the vehicle to a low-speed four-wheel drive mode.

Optionally, in the case that the vehicle speed is greater than the vehicle speed threshold, the method further includes: and outputting alarm information to remind the driver to decelerate.

Optionally, the outputting the alarm information includes: controlling an indicator lamp of an instrument of the vehicle to flash at a preset frequency; or alternatively, the process may be performed,

and controlling the indicator lamp of the instrument of the vehicle to be lightened in a preset color.

According to a second aspect of embodiments of the present disclosure, the present disclosure provides a low-speed four-wheel drive mode control device, applied to a vehicle, the device including:

the first acquisition module is configured to acquire a gear signal of the vehicle when the transfer case of the vehicle is in a low-speed four-wheel drive mode;

a second acquisition module configured to acquire a vehicle speed of the vehicle in a case where the vehicle is in a reverse gear or a drive gear;

the first execution module is configured to adjust the transfer case from the hard locking of the low-speed four-wheel drive mode to intelligent locking under the condition that the vehicle speed is greater than a vehicle speed threshold value, and acquire the angle of a steering wheel of the vehicle;

a second execution module configured to control the transfer case to distribute torque of front and rear wheels of the vehicle according to an angle of the steering wheel.

Optionally, the first execution module is further configured to control the transfer case to release torque for a preset period of time in a case where the vehicle is in neutral.

According to a third aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the low-speed four-wheel drive mode control method described above.

According to a fourth aspect of embodiments of the present disclosure, the present disclosure provides an electronic device, comprising:

a memory having a computer program stored thereon;

and the processor is used for executing the computer program in the memory to realize the steps of the low-speed four-wheel drive mode control method.

Through the above technical scheme, the technical scheme provided by the embodiment of the disclosure can include the following beneficial effects: under the condition that a transfer case of a vehicle is in a low-speed four-wheel drive mode, gear information of the vehicle is acquired, when the vehicle is in a reverse gear or a drive gear, the speed of the vehicle is acquired, under the condition that the speed of the vehicle is larger than a speed threshold value, the transfer case is adjusted from hard locking of the low-speed four-wheel drive mode to intelligent locking, the angle of a steering wheel of the vehicle is acquired, the transfer case is controlled to distribute torque of front and rear wheels of the vehicle according to the angle of the steering wheel, resonance when the steering braking of the vehicle is obvious and rollover when the vehicle turns is avoided, and the probability of occurrence of safety accidents is reduced.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

fig. 1 is a flowchart illustrating a low-speed four-drive mode control method according to an exemplary embodiment.

Fig. 2 is a control block diagram illustrating a low-speed four-wheel drive mode control method according to an exemplary embodiment.

FIG. 3 is another flow chart illustrating a low speed four-drive mode control method according to an exemplary embodiment.

Fig. 4 is a block diagram illustrating a low-speed four-wheel drive mode control device according to an exemplary embodiment.

Fig. 5 is a block diagram of an electronic device, according to an example embodiment.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present disclosure.

It should be noted that, in this disclosure, the terms "S101", "S102", and the like in the specification and claims and in the drawings are used for distinguishing between steps and not necessarily for performing the method steps in a particular order or sequence.

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

Before introducing the low-speed four-wheel-drive mode control method, the device, the storage medium and the electronic equipment provided by the embodiment of the disclosure, an application scenario of the disclosure is first introduced, and the low-speed four-wheel-drive mode control method of the disclosure can be applied to a vehicle.

The transfer case is an important component of an automobile power system, and has the main function of distributing power to a front transmission shaft and a rear transmission shaft, and transmitting torque to wheels of a vehicle through a main reduction driving shaft and a driving shaft so as to realize four-wheel drive. The transfer case of the vehicle comprises a high-speed driving mode, a low-speed driving mode and a neutral mode (N gear for short), wherein the high-speed driving mode comprises a four-wheel drive mode (4 WD mode for short) and a high-speed two-wheel drive mode (2H mode for short); the low-speed driving mode includes a low-speed four-drive mode (4L mode for short); in the N-gear state, the transfer case input shaft is disconnected from the output shaft. When the vehicle is in the 4L mode, the transfer case can amplify the output torque of the transmission by more than 2.5 times to enable the front axle and the rear axle to obtain larger input torque so as to improve the dynamic property of the vehicle, and the vehicle can face non-paved roads and road conditions with complex terrains from the container when the transfer case of the vehicle is in the 4L mode. When the vehicle runs under a smoother road condition, the transfer case is switched to a high-speed driving mode, so that the vehicle has better fuel economy. By mode switching of the transfer case, the dynamic performance and the fuel economy of the vehicle under different road conditions can be improved.

However, when the vehicle speed exceeds the set vehicle speed in the 4L mode, the vehicle steering brake obviously causes resonance of the vehicle or rollover during turning of the vehicle, so that safety accidents are caused; when the vehicle is in reversing/advancing staggered driving or steering, the torque is always in a loading state, so that impact abnormal sound is generated when the primary friction group is reversed due to the limitation of a mechanical structure, the transfer case and the transmission shaft are damaged, and the tire of the vehicle is seriously worn.

In order to solve the above-mentioned technical problem, the present disclosure provides a low-speed four-wheel-drive mode control method, which is applied to a vehicle as an example, and fig. 1 is a flowchart of a low-speed four-wheel-drive mode control method according to an exemplary embodiment. As shown in fig. 1, the method includes the following steps.

In step S101, a shift position signal of the vehicle is acquired in a case where the transfer case of the vehicle is in a low-speed four-drive mode.

In step S102, the vehicle speed of the vehicle is acquired in the case where the vehicle is in the reverse gear or the drive gear.

In step S103, when the vehicle speed is greater than the vehicle speed threshold, the transfer case is adjusted from the hard lock in the low-speed four-wheel drive mode to the intelligent lock, and the angle of the steering wheel of the vehicle is acquired.

In step S104, the transfer case is controlled to distribute the torque of the front and rear wheels of the vehicle according to the angle of the steering wheel.

The vehicle speed threshold may be preset according to a vehicle speed in an actual running process of the vehicle, which is not specifically limited in the present disclosure.

According to the low-speed four-wheel drive mode control method provided by the embodiment of the disclosure, gear information of a vehicle is obtained when the transfer case of the vehicle is in a low-speed four-wheel drive mode, the speed of the vehicle is obtained when the vehicle is in a reverse gear or a drive gear, the transfer case is adjusted from hard locking of the low-speed four-wheel drive mode to intelligent locking under the condition that the speed is greater than a speed threshold value, the angle of a steering wheel of the vehicle is obtained, the transfer case is controlled to distribute torque of front and rear wheels of the vehicle according to the angle of the steering wheel, resonance when the steering brake of the vehicle is obvious and rollover when the vehicle turns is avoided, and the probability of occurrence of safety accidents is reduced. Under the condition that the vehicle is in a low-speed four-wheel drive mode and the vehicle is in neutral position, the transfer case is controlled to release torque within a preset period of time, when the vehicle is in a reverse/forward staggered vehicle or turns, the torque is always in a loading state, and the mechanical structure is limited, so that impact abnormal sound is generated when the primary friction group is in the reversing state, and the damage of the transfer case and the transmission shaft and the reduced tire abrasion degree are avoided.

Specifically, as shown in fig. 2, the transfer case control unit acquires a 4L mode switch signal through a 4L mode switch, acquires a vehicle speed signal of a vehicle through a vehicle body electronic stabilization system, acquires a steering wheel angle signal through a combination switch assembly, acquires a gear signal of the vehicle through a gearbox, and then controls the transfer case and interacts with the vehicle's instrument.

Optionally, in step S101, a switching condition that the transfer case of the vehicle is in the low-speed four-wheel drive mode may include:

when the vehicle is in neutral and the vehicle speed is zero, the transfer case of the vehicle is switched to the low-speed four-wheel drive mode.

Specifically, the cut-in and cut-out of a low-speed four-drive mode (hereinafter referred to as a 4L mode) of the transfer case is mainly realized by a planetary gear train, a combined sleeve and a gear shifting motor. The transfer case is in a high-speed mode, and torque coming out of the gearbox is transmitted to an input shaft, a high-low gear combining sleeve and a rear output shaft of the transfer case. In the 4L mode, the torque from the gearbox is transmitted to the input shaft, the sun gear, the planet gears, the planet carrier, the high-low gear combination sleeve and the rear output shaft of the transfer case, and the torque is amplified.

Specifically, in step S102, when the vehicle is in a reverse gear, the accelerator pedal is stepped on for reversing, the driving wheel drives the driven wheel to rotate, and the torque is reversely transmitted; when the vehicle is in a driving gear, the accelerator pedal is stepped on to move forward, and at the moment, the driving wheel drives the driven wheel to rotate, so that the torque is transmitted forward. When the speed of the vehicle in the 4L mode exceeds the speed threshold, resonance occurs in the vehicle, so that traffic accidents occur.

In a hard Lock (hereinafter referred to as Lock) state of the transfer case in the 4L mode, the front and rear wheel torque of the vehicle is 1:1, distributing; when the transfer case is in an intelligent locking (Auto) state in a 4L mode, intelligent distribution of front and rear wheel torque of the vehicle can be realized.

Optionally, in step S103, in a case where the vehicle speed is greater than the vehicle speed threshold, the method may further include: and outputting alarm information to remind the driver to decelerate.

For example, when the transfer case of the vehicle is in the 4LAuto mode and the vehicle speed is greater than 40Km/h, an alarm message is output to remind the driver to reduce the speed so as to avoid the occurrence of safety accidents.

Optionally, outputting the alarm information may include: the method comprises the steps that an indicator lamp of an instrument of a vehicle is controlled to flash at a preset frequency; or alternatively, the process may be performed,

the indicator lamp of the meter controlling the vehicle is lighted long with a preset color.

The preset frequency can be preset according to a lamplight alarm in actual driving, and the disclosure is not limited in particular.

For example, in the case where the transfer case of the vehicle is in the 4LAuto mode and the vehicle speed is greater than 40Km/h, the indicator lamp of the meter controlling the vehicle blinks at a frequency of 3 times/sec; or the indicator lamp of the instrument panel of the control vehicle is lighted with an orange color. Thereby reminding the driver to slow down so as to avoid the occurrence of safety accidents.

Optionally, in step S104, controlling the transfer case to distribute the torque of the front and rear wheels of the vehicle according to the angle of the steering wheel may include:

the control transfer case distributes the torque of the front and rear wheels of the vehicle according to a preset relationship of the angle of the steering wheel, the angle of the steering wheel and the torque of the front wheels of the vehicle, wherein the angle of the steering wheel and the torque of the front wheels of the vehicle are in an inverse relationship.

Specifically, the transfer case is controlled to reduce the torque distributed to the front wheels of the vehicle and to increase the reduced torque to the rear wheels of the vehicle in accordance with the inverse relationship of the steering wheel angle, and the torque of the front wheels of the vehicle.

For example, when the steering wheel is turned 0 ° with the transfer case of the vehicle in 4LAuto mode and the vehicle speed greater than 40Km/h, the transfer case distributes 90% of the torque to the front wheels of the vehicle and the remaining torque to the rear wheels of the vehicle; when the steering wheel has a 90-degree angle, the transfer case distributes 45% of torque to the front wheels of the vehicle, and the rest of torque is distributed to the rear wheels of the vehicle; when the steering wheel has a rotation angle of 180 degrees, the transfer case distributes 25% of torque to the front wheels of the vehicle, and the rest of torque is distributed to the rear wheels of the vehicle; when the steering wheel turns 170 degrees, the transfer case distributes 10% of torque to the front wheels of the vehicle, and the rest of torque is distributed to the rear wheels of the vehicle. The inter-axle differential is realized, and the steering braking and the vehicle rollover risk of the vehicle are reduced.

After the four-wheel drive control unit of the vehicle collects signals such as an engine accelerator opening degree signal, an engine rotating speed signal, a four-wheel rotating speed signal and the like, whether the vehicle slips or whether the vehicle turns is judged, and then a command is sent to an electromagnetic coil of a TOD (Torque-On-Demand). The electromagnetic coil generates different electromagnetic forces according to the magnitude of current, the electromagnetic force controls the adsorption force of the electromagnetic coil and the pressure plate, and the adsorption force is transmitted to the wet friction plate mechanism through the pressure amplifier, so that the tightness of the friction plate is controlled to transmit torque and the magnitude of torsion is controlled. The transmitted torque with controllable magnitude is transmitted to the front transmission shaft and the front driving axle through the chain wheels and the chain.

When the coil is electrified, the rotor and the armature are attracted, the resistance is transmitted to the rotor by the driving sprocket on the vehicle through the shell of the secondary wet friction plate group and the armature, so that the rotor is instantaneously decelerated, the driven wheel on the vehicle rotates relative to the driving wheel, the inclined conical surface of the driven wheel pushes the steel ball and the ball cam driving wheel, so that the driving wheel moves axially, the ball cam driving wheel pushes the pressure plate, the pressure plate compresses the friction plate assembly, the driving sprocket is driven to enter a four-wheel driving state, and the power is transmitted to the driving sprocket by the friction plate group, so that front wheel driving is realized.

When the vehicle is in reversing/advancing staggered driving or steering, the torque is always in a loading state, and the primary friction group is reversed and impacted to be abnormal sound due to the limitation of a mechanical structure, so that the transfer case and the transmission shaft are damaged, and the tires of the vehicle are seriously worn.

Optionally, the method may further include: and controlling the transfer case to release torque in a preset time period when the vehicle is in neutral gear.

The preset duration may be preset according to the torque in the actual running of the vehicle, which is not specifically limited in the present disclosure.

For example, when the transfer case of the vehicle is in a 4LLock mode and the current of the transfer case electromagnetic coil is loaded to the maximum, and the vehicle is in a neutral gear, the transfer case electromagnetic coil is controlled to release the current for 1 s-3 s so as to realize the release of the torque of the transfer case, eliminate the reversing impact abnormal sound of the driving wheel caused by the limitation of a mechanical structure, avoid the damage of the transfer case and a transmission shaft and reduce the tire wear degree of the vehicle.

For example, as shown in fig. 3, a 4L mode switch signal, a vehicle speed signal, a steering wheel rotation angle signal, and a gear signal are obtained, and whether the transfer case satisfies a 4L mode switching condition is determined according to the 4L mode switch signal, the vehicle speed signal, the steering wheel rotation angle signal, and the gear signal.

Under the condition that the transfer case meets the switching condition of the 4L mode, controlling the transfer case to switch to the 4LLock mode, and judging whether the vehicle is in a D/R gear or not and the speed of the vehicle is greater than zero; under the condition that the transfer case does not meet the 4L mode switching condition, reminding a driver of not meeting the 4L switching condition through an instrument of the vehicle.

Under the condition that the vehicle is in a D/R gear and the vehicle speed is greater than zero, the electromagnetic coil current of the transfer case is loaded to the maximum, and the gearbox detects the gear of the vehicle and judges whether the vehicle is in a neutral gear; when the vehicle is not in the D/R gear and the acquired vehicle speed is less than or equal to zero, the transfer case electromagnetic coil is not loaded with current.

Under the condition that the vehicle is in neutral gear, the electromagnetic coil of the transfer case releases current for 1 s-3 s; and under the condition that the vehicle is not in neutral gear, the current loading of the electromagnetic coil of the transfer case is unchanged, and whether the vehicle speed is greater than a vehicle speed threshold value is judged.

Under the condition that the vehicle speed is greater than a vehicle speed threshold value, adjusting the transfer case from 4LLock to 4LAuto, controlling the transfer case to distribute the torque of front and rear wheels of the vehicle according to the angle of the steering wheel corner, and controlling an indicator lamp of an instrument of the vehicle to flash at a preset frequency; or, controlling an indicator lamp of an instrument of the vehicle to be lightened in a preset color; and when the vehicle speed is less than or equal to a vehicle speed threshold value, controlling torque distribution of the transfer case in a 4LLock mode.

Fig. 4 is a block diagram showing a low-speed four-wheel drive mode control apparatus according to an exemplary embodiment, which is applied to a vehicle. As shown in fig. 4, the low-speed four-wheel-drive mode control apparatus 1300 includes a first acquisition module 1301, a second acquisition module 1302, a first execution module 1303, and a second execution module 1304.

Wherein the first acquiring module 1301 is configured to acquire a gear signal of the vehicle in case the transfer case of the vehicle is in a low-speed four-drive mode;

the second acquisition module 1302 is configured to acquire a vehicle speed of the vehicle in a case where the vehicle is in a reverse gear or a drive gear;

the first execution module 1303 is configured to adjust the transfer case from the hard locking of the low-speed four-wheel drive mode to the intelligent locking under the condition that the vehicle speed is greater than the vehicle speed threshold value, and acquire the angle of the steering wheel of the vehicle;

the second execution module 1304 is configured to control the transfer case to distribute torque of front and rear wheels of the vehicle according to an angle of the steering wheel.

According to the low-speed four-wheel drive mode control device, gear information of a vehicle is obtained when the transfer case of the vehicle is in a low-speed four-wheel drive mode, the speed of the vehicle is obtained when the vehicle is in a reverse gear or a drive gear, the transfer case is adjusted from hard locking of the low-speed four-wheel drive mode to intelligent locking under the condition that the speed is greater than a speed threshold value, the angle of a steering wheel of the vehicle is obtained, the transfer case is controlled to distribute torque of front and rear wheels of the vehicle according to the angle of the steering wheel, resonance when the steering braking of the vehicle is obvious is avoided, rollover occurs when the vehicle turns, and the probability of occurrence of safety accidents is reduced. Under the condition that the vehicle is in a low-speed four-wheel drive mode and the vehicle is in neutral position, the transfer case is controlled to release torque within a preset period of time, when the vehicle is in a reverse/forward staggered vehicle or turns, the torque is always in a loading state, and the mechanical structure is limited, so that impact abnormal sound is generated when the primary friction group is in the reversing state, and the damage of the transfer case and the transmission shaft and the reduced tire abrasion degree are avoided.

Optionally, the first obtaining module 1301 is further configured to switch the transfer case of the vehicle to the low-speed four-drive mode in case the vehicle is in neutral and the vehicle speed is zero.

Optionally, the first executing module 1303 is configured to output an alarm message to remind the driver to slow down if the vehicle speed is greater than a vehicle speed threshold.

Optionally, the first executing module 1303 is configured to control an indicator light of an instrument of the vehicle to blink at a preset frequency; or alternatively, the process may be performed,

Optionally, the second execution module 1304 is configured to control the transfer case to distribute the torque of the front and rear wheels of the vehicle according to a preset relationship of the angle of the steering wheel, the angle of the steering wheel and the torque of the front wheels of the vehicle, wherein the angle of the steering wheel and the torque of the front wheels of the vehicle are in an inverse relationship.

Optionally, the second acquisition module 1302 is configured to control the transfer case to release torque for a preset period of time with the vehicle in neutral.

It should be noted that, for convenience and brevity, the embodiments described in the specification are all preferred embodiments, and the parts related to the embodiments are not necessarily essential to the present invention, for example, the first execution module and the second execution module may be separate devices or the same device when implemented, which is not limited by the present disclosure.

The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.

The present disclosure also provides a computer readable storage medium having stored thereon computer program instructions which, when executed by a processor, implement the steps of the low speed four-wheel drive mode control method provided by the present disclosure.

In particular, the computer readable storage medium may be a flash memory, a hard disk, a multimedia card, a card memory (e.g., SD or DX memory, etc.), a Random Access Memory (RAM), a Static Random Access Memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read-only memory (PROM), a magnetic memory, a magnetic disk, an optical disk, a server, etc.

With respect to the computer-readable storage medium in the above-described embodiments, the steps of the low-speed four-wheel-drive mode control method when the computer program stored thereon is executed have been described in detail in the embodiments regarding the method, and are not described in detail herein.

The present disclosure also provides an electronic device including:

a memory having a computer program stored thereon;

According to the electronic equipment provided by the embodiment of the disclosure, under the condition that the transfer case of the vehicle is in a low-speed four-wheel drive mode, gear information of the vehicle is acquired, when the vehicle is in a reverse gear or a drive gear, the speed of the vehicle is acquired, under the condition that the speed is greater than a speed threshold value, the transfer case is adjusted from hard locking of the low-speed four-wheel drive mode to intelligent locking, the angle of the steering wheel of the vehicle is acquired, the transfer case is controlled to distribute torque of front wheels and rear wheels of the vehicle according to the angle of the steering wheel, resonance when the steering braking of the vehicle is obvious and rollover when the vehicle turns is avoided, and the probability of occurrence of safety accidents is reduced. Under the condition that the vehicle is in a low-speed four-wheel drive mode and the vehicle is in neutral position, the transfer case is controlled to release torque within a preset period of time, when the vehicle is in a reverse/forward staggered vehicle or turns, the torque is always in a loading state, and the mechanical structure is limited, so that impact abnormal sound is generated when the primary friction group is in the reversing state, and the damage of the transfer case and the transmission shaft and the reduced tire abrasion degree are avoided.

Fig. 5 is a block diagram of an electronic device 700, according to an example embodiment. As shown in fig. 5, the electronic device 700 may include: a processor 701, a memory 702. The electronic device 700 may also include one or more of a multimedia component 703, an input/output (I/O) interface 704, and a communication component 705.

The processor 701 is configured to control the overall operation of the electronic device 700, so as to complete all or part of the steps in the low-speed four-wheel-drive mode control method. The memory 702 is used to store various types of data to support operation on the electronic device 700, which may include, for example, instructions for any application or method operating on the electronic device 700, as well as application-related data such as gear signals of a vehicle, speed of a vehicle, steering wheel angle of a vehicle, messages transmitted and received, pictures, audio, video, and so forth.

The Memory 702 may be implemented by any type or combination of volatile or non-volatile Memory devices, such as static random access Memory (Static Random Access Memory, SRAM for short), electrically erasable programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM for short), erasable programmable Read-Only Memory (Erasable Programmable Read-Only Memory, EPROM for short), programmable Read-Only Memory (Programmable Read-Only Memory, PROM for short), read-Only Memory (ROM for short), magnetic Memory, flash Memory, magnetic disk, or optical disk. The multimedia component 703 can include a screen and an audio component. Wherein the screen may be, for example, a touch screen, the audio component being for outputting and/or inputting audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signals may be further stored in the memory 702 or transmitted through the communication component 705. The audio assembly further comprises at least one speaker for outputting audio signals.

The I/O interface 704 provides an interface between the processor 701 and other interface modules, which may be a keyboard, mouse, buttons, etc. These buttons may be virtual buttons or physical buttons.

The communication component 705 is for wired or wireless communication between the electronic device 700 and other devices. Wireless communication, such as Wi-Fi, bluetooth, near field communication (Near Field Communication, NFC for short), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or one or a combination of more of them, is not limited herein. The corresponding communication component 705 may thus comprise: wi-Fi module, bluetooth module, NFC module, etc.

In an exemplary embodiment, the electronic device 700 may be implemented by one or more application specific integrated circuits (Application Specific Integrated Circuit, abbreviated as ASIC), digital signal processors (Digital Signal Processor, abbreviated as DSP), digital signal processing devices (Digital Signal Processing Device, abbreviated as DSPD), programmable logic devices (Programmable Logic Device, abbreviated as PLD), field programmable gate arrays (Field Programmable Gate Array, abbreviated as FPGA), controllers, microcontrollers, microprocessors, or other electronic components for performing the low-speed four-drive mode control method described above.

In another exemplary embodiment, a computer program product is also provided, comprising a computer program executable by a programmable apparatus, the computer program having code portions for performing the low speed four-wheel drive mode control method described above when executed by the programmable apparatus.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. A low-speed four-wheel drive mode control method, characterized by being applied to a vehicle, comprising:

controlling the transfer case to distribute the torque of front and rear wheels of the vehicle according to the angle of the steering wheel;

the controlling the transfer case to distribute torque of front and rear wheels of the vehicle according to the angle of the steering wheel includes:

2. The method according to claim 1, wherein the method further comprises:

3. The method of claim 1, wherein the transfer case of the vehicle is a low-speed four-drive mode switching condition, comprising:

4. The method of claim 1, wherein, in the event that the vehicle speed is greater than a vehicle speed threshold, the method further comprises: and outputting alarm information to remind the driver to decelerate.

5. The method of claim 4, wherein outputting the alarm information comprises: controlling an indicator lamp of an instrument of the vehicle to flash at a preset frequency; or alternatively, the process may be performed,

6. A low-speed four-wheel drive mode control apparatus for use with a vehicle, the apparatus comprising:

a second execution module configured to control the transfer case to distribute torque of front and rear wheels of the vehicle according to an angle of the steering wheel;

the second execution module is further configured to control the transfer case to distribute the torque of the front and rear wheels of the vehicle according to a preset relation among the angle of the steering wheel, the angle of the steering wheel and the torque of the front wheels of the vehicle, wherein the angle of the steering wheel and the torque of the front wheels of the vehicle are in an inverse relation.

7. The apparatus of claim 6, wherein the first execution module is further configured to control the transfer case to release torque for a preset period of time with the vehicle in neutral.

8. A computer readable storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a processor, implements the steps of the low-speed four-wheel drive mode control method according to any one of claims 1-5.

9. An electronic device, comprising:

a memory having a computer program stored thereon;

a processor for executing the computer program in the memory to implement the steps of the low speed four-wheel drive mode control method of any one of claims 1-5.