CN115596823A

CN115596823A - Six-wheel motor vehicle differential lock control method and device and vehicle

Info

Publication number: CN115596823A
Application number: CN202211298794.5A
Authority: CN
Inventors: 蔡然; 焦娜永; 陈龙华; 薛娜娜; 马江丰; 魏总亮; 孙二龙; 刘对宾; 耿建峰; 田志军
Original assignee: Exquisite Automotive Systems Co Ltd
Current assignee: Exquisite Automotive Systems Co Ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-01-13

Abstract

The application provides a six-wheel motor vehicle differential lock control method, a six-wheel motor vehicle differential lock control device and a vehicle, and belongs to the technical field of vehicles. According to the six-wheel motor vehicle differential lock control method, the front axle inter-wheel lock, the middle axle inter-wheel lock, the rear axle inter-wheel lock and the middle rear axle inter-shaft lock are provided with the corresponding parameter information, and when the parameter information corresponding to the target differential lock meets the corresponding locking condition, the target differential lock is controlled to enter the locking state, so that the locking control of the middle axle inter-wheel lock and the rear axle inter-shaft lock in the six-wheel motor vehicle is realized, the problem that misoperation easily occurs due to the fact that a plurality of differential lock key switches are arranged can be effectively avoided, and the trapped-escaping effect and the driving safety of the six-wheel motor vehicle are further guaranteed.

Description

Six-wheel motor vehicle differential lock control method and device and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to a six-wheel motor vehicle differential lock control method and device and a vehicle.

Background

The differential is used as a very important automobile part and plays a role in adjusting the rotating speed of wheels on the left side and the right side in the running process of a vehicle, reducing the friction between tires and the ground and realizing smooth turning of the wheels. When the vehicle falls into sand, snow, mud, or one wheel leaves the ground, the torque of the wheel on the high adhesion side is used to accelerate the wheel on the low adhesion side due to the differential action of the differential, and power is consumed, so that the vehicle cannot obtain power to get out of the way. In order to improve the off-road performance of the vehicle, a differential lock is usually configured to lock a differential mechanism so that left and right wheels are rigidly connected into a whole, and torque and grip force are transmitted to the wheels without slipping to help the vehicle get out of the way.

Six-wheel motor vehicle compares in traditional four-wheel motor vehicle, through addding a two-wheeled to form middle axle and rear axle at the vehicle rear end, and connect middle and rear axle interaxle lock between middle axle and rear axle, can effectively increase the cross-country ability of getting rid of poverty of vehicle in abominable road conditions. However, for a six-wheel motor vehicle equipped with front, middle and rear wheel differential locks and middle and rear axle differential locks, a control strategy for the middle and rear axle wheel locks is lacked, and the locking/unlocking of the four differential locks are controlled by independent differential lock key switches, so that when frequent locking/unlocking is performed under complex working conditions, misoperation is easy to occur, the operation stability of the vehicle is reduced, the difficulty escaping effect is poor, and even the driving safety of the vehicle and personnel is influenced.

Disclosure of Invention

The application provides a six-wheel motor vehicle differential lock control method, a six-wheel motor vehicle differential lock control device and a six-wheel motor vehicle, and aims to solve the problem that misoperation is easy to occur due to the fact that a safe and effective locking control strategy is lacked in the prior art.

In order to solve the above problems, the present application adopts the following technical solutions:

in a first aspect, an embodiment of the present application provides a six-wheel motor vehicle differential lock control method, where the method includes:

acquiring a locking instruction of a target differential lock; the target differential lock is a front axle inter-wheel lock, a middle axle inter-wheel lock, a rear axle inter-wheel lock or a middle and rear axle inter-shaft lock;

when the target differential lock is the intermediate and rear axle inter-axle lock, acquiring first parameter information, and controlling the intermediate and rear axle inter-axle lock to enter a locking state based on the first parameter information; (ii) a Or the like, or a combination thereof,

when the target differential lock is the inter-axle wheel lock, second parameter information is obtained, and the inter-axle wheel lock is controlled to enter a locking state based on the second parameter information; or, the first and second electrodes are connected with each other,

when the target differential lock is the rear axle inter-wheel lock, acquiring third parameter information, and controlling the rear axle inter-wheel lock to enter a locking state based on the third parameter information; or, the first and second electrodes are connected with each other,

and when the target differential lock is the front axle inter-wheel lock, acquiring fourth parameter information, and controlling the front axle inter-wheel lock to enter a locked state based on the fourth parameter information.

In an embodiment of the present application, the first parameter information includes: the speed, the speed of a front axle wheel, the speed of a rear axle wheel and the gear state of a transfer case;

based on the first parameter information, controlling the lock between the middle rear axle and the rear axle to enter a locking state, wherein the method comprises the following steps:

and when the vehicle speed is less than a first vehicle speed threshold value, the wheel speed difference between the wheel speed of the front axle and the wheel speed of the rear axle is less than a first wheel speed threshold value, and the gear state of the transfer case is in a first preset gear, controlling the inter-axle lock of the middle and rear axles to enter a locking state.

In an embodiment of the present application, the second parameter information includes: the vehicle speed, the transfer case state and the unlocking and locking state of the lock between the middle rear axle shafts;

controlling the lock between the middle axle wheels to enter a locking state based on the second parameter information, and the method comprises the following steps:

and when the vehicle speed is less than a second vehicle speed threshold value, the gear state of the transfer case is in a second preset gear, and the unlocking state of the inter-axle lock of the middle rear axle is in a locking state, controlling the inter-axle lock of the middle axle to enter the locking state.

In an embodiment of the present application, the third parameter information includes: the locking and unlocking state of the lock between the middle rear axle shafts is realized by the speed of the vehicle, the left wheel speed of the rear axle, the right wheel speed of the rear axle; (ii) a

Controlling the rear axle wheel lock to enter a locked state based on the third parameter information, comprising:

and when the vehicle speed is less than a third vehicle speed threshold value, the wheel speed difference between the left wheel speed of the rear axle and the right wheel speed of the rear axle is less than a second wheel speed threshold value, the gear state of the transfer case is in a third preset gear, and the unlocking state of the inter-axle lock of the middle rear axle is in a locking state, controlling the inter-wheel lock of the rear axle to enter the locking state.

In an embodiment of the present application, the fourth parameter information includes: the locking and unlocking state of the lock between the middle axle wheels and the lock between the rear axle wheels;

controlling the front axle wheel lock to enter a locked state based on the fourth parameter information, comprising:

and when the vehicle speed is less than a fourth vehicle speed threshold value, the wheel speed difference between the left wheel speed of the front axle and the right wheel speed of the front axle is less than a third wheel speed threshold value, the gear state of the transfer case is in a fourth preset gear, the unlocking state of the inter-axle lock between the middle axle and the rear axle is in a locking state, controlling the inter-wheel lock between the front axle to enter the locking state.

In an embodiment of the present application, the method further includes:

acquiring the current vehicle speed under the condition that the target differential lock enters a locking state;

judging whether the current vehicle speed is greater than or equal to a fifth vehicle speed threshold value and less than or equal to a sixth vehicle speed threshold value;

and if so, outputting overspeed alarm information of the target differential lock.

In an embodiment of the present application, after the overspeed warning information of the target differential lock is output, the method further includes:

when the current vehicle speed is reduced to be lower than the fifth vehicle speed threshold value, the overspeed warning information is released; or the like, or, alternatively,

and when the current vehicle speed is increased to be higher than the sixth vehicle speed threshold value, controlling the target differential lock to unlock.

In an embodiment of the present application, the method further includes:

controlling unlocking of the middle-rear axle inter-axle lock, the front axle inter-wheel lock, the middle axle inter-wheel lock and the rear axle inter-wheel lock in response to an unlocking instruction for the middle-rear axle inter-axle lock; or the like, or, alternatively,

controlling the lock between the middle axle wheel and the lock between the front axle wheel to be unlocked in response to an unlocking instruction for the lock between the middle axle wheel and the lock between the middle axle wheel; or the like, or, alternatively,

and controlling the rear axle inter-wheel lock and the front axle inter-wheel lock to be unlocked in response to an unlocking instruction for the rear axle inter-wheel lock.

In a second aspect, based on the same inventive concept, an embodiment of the present application provides a six-wheel motor vehicle differential lock control device, including:

the locking instruction acquisition module is used for acquiring a locking instruction of the target differential lock; (ii) a The target differential lock is a front axle inter-wheel lock, a middle axle inter-wheel lock, a rear axle inter-wheel lock or a middle and rear axle inter-shaft lock; (ii) a

The middle and rear axle inter-axle lock control module is used for acquiring first parameter information when the target differential lock is the middle and rear axle inter-axle lock, and controlling the middle and rear axle inter-axle lock to enter a locked state based on the first parameter information;

the intermediate axle inter-wheel lock control module is used for acquiring second parameter information when the target differential lock is the intermediate axle inter-wheel lock, and controlling the intermediate axle inter-wheel lock to enter a locked state based on the second parameter information;

the rear axle inter-wheel lock control module is used for acquiring third parameter information when the target differential lock is the rear axle inter-wheel lock, and controlling the rear axle inter-wheel lock to enter a locked state based on the third parameter information;

and the front axle inter-wheel lock control module is used for acquiring fourth parameter information when the target differential lock is the front axle inter-wheel lock, and controlling the front axle inter-wheel lock to enter a locked state based on the fourth parameter information.

the inter-axle lock control module of the middle and rear axles is specifically used for controlling the inter-axle lock of the middle and rear axles to enter a locking state when the speed of the vehicle is less than a first wheel speed threshold value, the wheel speed difference between the wheel speed of the front axle and the wheel speed of the rear axle is less than a first wheel speed threshold value, and the gear state of the transfer case is in a first preset gear.

the inter-wheel lock control module of the middle axle is specifically used for controlling the inter-wheel lock of the middle axle to enter a locking state when the vehicle speed is less than a second vehicle speed threshold value, the gear state of the transfer case is in a second preset gear, and the unlocking state of the inter-axle lock of the middle rear axle is in the locking state.

The rear axle inter-wheel lock control module is specifically used for controlling the rear axle inter-wheel lock to enter a locking state when the vehicle speed is less than a third vehicle speed threshold value, the wheel speed difference between the left wheel speed of the rear axle and the right wheel speed of the rear axle is less than a second wheel speed threshold value, the gear state of the transfer case is in a third preset gear, and the unlocking state of the middle rear axle inter-axle lock is in the locking state.

the front axle inter-wheel lock control module is specifically used for controlling the front axle inter-wheel lock to enter a locking state when the vehicle speed is less than a fourth vehicle speed threshold value, the wheel speed difference between the left wheel speed of the front axle and the right wheel speed of the front axle is less than a third vehicle speed threshold value, the gear state of the transfer case is in a fourth preset gear, the unlocking state of the middle and rear axle inter-shaft lock is in a locking state, the unlocking state of the middle axle inter-wheel lock is in a locking state, and the unlocking state of the rear axle inter-wheel lock is in a locking state.

In an embodiment of the present application, the six-wheel vehicle differential lock control device further includes:

the current vehicle speed acquisition module is used for acquiring the current vehicle speed under the condition that the target differential lock enters a locking state;

the judging module is used for judging whether the current vehicle speed is greater than or equal to a fifth vehicle speed threshold value and less than or equal to a sixth vehicle speed threshold value;

and the overspeed alarm module is used for outputting overspeed alarm information of the target differential lock when the current vehicle speed is greater than or equal to a fifth vehicle speed threshold and less than or equal to a sixth vehicle speed threshold.

the alarm removing module is used for removing overspeed alarm information of the target differential lock when the current vehicle speed is reduced to be lower than a fifth vehicle speed threshold value after the overspeed alarm information is output;

and the automatic unlocking module is used for controlling the target differential lock to unlock when the current vehicle speed is increased to be higher than the sixth vehicle speed threshold value.

the first following unlocking module is used for responding to an unlocking instruction aiming at the middle and rear axle inter-axle lock and controlling the middle and rear axle inter-axle lock, the front axle inter-wheel lock, the middle axle inter-wheel lock and the rear axle inter-wheel lock to be unlocked;

the second follow-up unlocking module is used for responding to an unlocking instruction aiming at the middle axle inter-wheel lock and controlling the middle axle inter-wheel lock and the front axle inter-wheel lock to be unlocked;

and the third following unlocking module is used for responding to an unlocking instruction aiming at the rear axle inter-wheel lock and controlling the rear axle inter-wheel lock and the front axle inter-wheel lock to be unlocked.

In a third aspect, based on the same inventive concept, embodiments of the present application provide a vehicle, including a processor and a memory, where the memory stores machine executable instructions executable by the processor, and the processor is configured to execute the machine executable instructions to implement the six-wheel vehicle differential lock control method according to the first aspect of the present application.

Compared with the prior art, the method has the following advantages:

according to the embodiment of the application, the locking instruction of the target differential lock is obtained, the first parameter information can be obtained when the target differential lock is the middle and rear axle inter-axle lock, and the middle and rear axle inter-axle lock is controlled to enter the locking state based on the first parameter information; or when the target differential lock is the inter-axle wheel lock, acquiring second parameter information, and controlling the inter-axle wheel lock to enter a locking state based on the second parameter information; or when the target differential lock is the rear axle inter-wheel lock, acquiring third parameter information, and controlling the rear axle inter-wheel lock to enter a locking state based on the third parameter information; or when the target differential lock is the front axle inter-wheel lock, acquiring fourth parameter information, and controlling the front axle inter-wheel lock to enter a locking state based on the fourth parameter information. The embodiment of the application sets up different locking conditions respectively through locking between the wheel for the front axle, lock between the wheel of well bridge, lock between the wheel of rear axle and lock between the rear axle, make only when the parameter information that the target differential lock corresponds satisfies corresponding locking condition, just control the target differential lock and get into the locking state, not only realized the locking control to lock between the wheel of well bridge in the six-wheel motor car and lock between the rear axle, can also effectively avoid differential lock button switch more problem that maloperation appears easily, and then guarantee the effect of getting rid of poverty and driving safety of six-wheel motor car.

Drawings

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

Fig. 1 is a flowchart illustrating steps of a six-wheel vehicle differential lock control method according to an embodiment of the present application.

Fig. 2 is a functional module schematic diagram of a six-wheel motor vehicle differential lock control device according to an embodiment of the application.

Reference numerals: 200-six-wheel motor vehicle differential lock control device; 201-locking instruction acquisition module; 202-middle and rear axle inter-shaft lock control module; 203-middle axle inter-wheel lock control module; 204-a rear axle inter-wheel lock control module; 205-front axle inter-wheel lock control module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

It should be noted that, in the current differential lock control strategy, determination needs to be performed according to information parameters such as vehicle speed and wheel speed to control locking/unlocking of the differential lock, and under such technical conditions, the wheel speed of an axle where the differential lock is located needs to be monitored, that is, each axle needs to be provided with a wheel speed sensor to perform wheel speed acquisition. The middle axle of the six-wheel motor vehicle is not provided with a wheel speed sensor, so that the wheel speed of the middle axle cannot be acquired, the locking/unlocking condition is lost, and the locking failure is easy to generate; meanwhile, the six-wheel motor vehicle provided with the front axle inter-wheel lock, the middle axle inter-wheel lock, the rear axle inter-wheel lock and the middle rear axle inter-shaft lock is provided with a plurality of differential lock key switches, the locking/unlocking of the four differential locks are controlled by the independent differential lock key switches, and when the locking/unlocking is frequently carried out under the complicated working conditions, the misoperation problem is easy to occur.

Aiming at the problem that misoperation is easy to occur due to the fact that a safe and effective locking control strategy is lacked for a six-wheel motor vehicle in the prior art, the application provides a six-wheel motor vehicle differential lock control method, different locking conditions are respectively set for a front axle inter-wheel lock, a middle axle inter-wheel lock, a rear axle inter-wheel lock and a rear axle inter-shaft lock, so that only when parameter information corresponding to a target differential lock meets the corresponding locking conditions, the target differential lock is controlled to enter a locking state, locking control over the middle axle inter-wheel lock and the rear axle inter-shaft lock in the six-wheel motor vehicle is achieved, the problem that misoperation is easy to occur due to more key switches of the differential lock can be effectively avoided, the six-wheel motor vehicle escaping effect is improved, and driving safety is guaranteed.

Referring to fig. 1, a six-wheel motor vehicle differential lock control method according to the present application is shown, and the method may specifically include the following steps:

s101: acquiring a locking instruction of a target differential lock; the target differential lock is a front axle inter-wheel lock, a middle axle inter-wheel lock, a rear axle inter-wheel lock or a middle and rear axle inter-shaft lock.

It should be noted that the actuator body of the embodiment may be a six-wheel drive vehicle, such as a six-wheel motor vehicle, and may be specifically applied to a six-wheel motor vehicle differential lock control system, where the six-wheel motor vehicle differential lock control system includes a front axle inter-wheel lock, a middle axle inter-wheel lock, a rear axle inter-wheel lock, and a middle rear axle inter-axle lock. The front axle inter-wheel lock is arranged in the front axle, the middle axle inter-wheel lock and the middle rear axle inter-axle lock are both arranged in the middle axle, and the rear axle is arranged in the rear axle; the front axle inter-wheel lock, the middle axle inter-wheel lock and the rear axle inter-wheel lock are used for correspondingly locking the front axle, the middle axle and the rear axle inter-wheel differentials respectively, so that the left and right wheels have no speed difference, and keep synchronous rotation, and are mainly used for escaping from difficulties; the differential lock is used for locking the inter-axle differential, under normal conditions, the inter-axle differential lock is not opened, the inter-axle differential plays a differential role, the differential principle is the same as the inter-wheel differential, the middle axle and the rear axle can rotate at different angular speeds, the differential lock is started mainly for adapting to road conditions with variable fluctuation and gradient, the middle axle and the rear axle rotate at the same angular speed mainly for adapting to road conditions with muddy slipping, and the two axles are not placed on the road conditions with slipping and lose power.

In this embodiment, for the front axle inter-wheel lock, the middle axle inter-wheel lock, the rear axle inter-wheel lock, and the rear axle inter-axle lock, the six-wheel motor vehicle differential lock control system is provided with four differential lock key switches including a front axle inter-wheel lock switch, a middle axle inter-wheel lock switch, a rear axle inter-wheel lock switch, and a rear axle inter-axle lock switch, for respectively controlling the front axle inter-wheel lock, the middle axle inter-wheel lock, the rear axle inter-wheel lock, and the rear axle inter-axle lock to be locked or unlocked. When the locking operation is carried out, a user can trigger a differential lock key switch corresponding to the target differential lock according to the requirement of the user, and a locking instruction corresponding to the target differential lock is sent to the six-wheel motor vehicle differential lock control system.

In the embodiment, the locking condition is limited by environmental factors and driving experience, a driver is often difficult to accurately judge the locking condition under a complex working condition, and then misoperation problems occur, such as the unlocking of a wrong differential lock, therefore, in order to avoid the occurrence of the problems, after the driver triggers a locking instruction of a target differential lock, parameter judgment is required to be carried out, and the vehicle can enter a locking state only after the parameters of the current vehicle meet the corresponding locking conditions.

The embodiment needs to be explained in that the front axle inter-wheel lock, the middle axle inter-wheel lock and the rear axle inter-wheel lock solve the problem of idle running of wheels on one side, and must be disconnected during normal running, and particularly, the front axle inter-wheel lock has the greatest influence on the running safety; and after the lock locking between the middle axle and the rear axle, the four wheels of the middle axle and the rear axle are driven completely, the lock can be started in the driving process of a muddy slipping road section, and the influence degree on the driving safety is smaller, so that the locking sequence of the front axle wheel lock, the middle axle wheel lock, the rear axle wheel lock or the rear axle wheel lock is regulated based on the influence degree of each differential lock on the driving safety, and the following conditions are required to be met: only when the middle rear axle shaft lock is locked, the middle axle wheel lock and the rear axle wheel lock are allowed to be locked; and only when the middle rear axle shaft lock, the middle axle wheel lock and the rear axle wheel lock are all locked, the front axle wheel lock is allowed to be locked.

S102: and when the target differential lock is the middle and rear axle inter-axle lock, acquiring first parameter information, and controlling the middle and rear axle inter-axle lock to enter a locking state based on the first parameter information.

In this embodiment, for the intermediate and rear axle inter-axle lock, first parameter information corresponding to the intermediate and rear axle inter-axle lock may be acquired, and it is determined whether the first parameter information satisfies a corresponding first preset locking condition, if so, the intermediate and rear axle inter-axle lock is controlled to be locked, otherwise, the intermediate and rear axle inter-axle lock is not controlled to be locked, and the intermediate and rear axle inter-axle lock is maintained in an unlocked state.

Specifically, the first parameter information may include: the speed, the speed of a front axle wheel, the speed of a rear axle wheel and the gear state of a transfer case; the corresponding first preset locking condition may be: the speed of the vehicle is smaller than a first speed threshold value, the wheel speed difference between the front axle wheel speed and the rear axle wheel speed is smaller than the first wheel speed threshold value, and the gear state of the transfer case is in a first preset gear. Wherein, the average value of the wheel speeds of the left and right wheels of the front axle can be used as the wheel speed of the front axle, and the average value of the wheel speeds of the left and right wheels of the rear axle can be used as the wheel speed of the rear axle.

For example, the first vehicle speed threshold may be set to 5km/H, the first wheel speed threshold may be set to 30rpm, and the first preset gear may be a six-wheel drive high speed mode (hereinafter, referred to as 6H mode) or a six-wheel drive low speed mode (hereinafter, referred to as 6L mode). That is, when the vehicle speed is less than 5km/H, the wheel speed difference between the front axle wheel speed and the rear axle wheel speed is less than 30rpm, and the transfer gear state is in the 6H or 6L mode, the rear axle inter-axle lock is controlled to enter the locked state.

S103: and when the target differential lock is the inter-wheel lock of the middle axle, acquiring second parameter information, and controlling the inter-wheel lock of the middle axle to enter a locking state based on the second parameter information.

In this embodiment, for the inter-axle wheel lock, second parameter information corresponding to the inter-axle wheel lock may be obtained, and it is determined whether the second parameter information satisfies a second preset locking condition, if so, the inter-axle wheel lock is controlled to be locked, otherwise, the inter-axle wheel lock is not controlled to be locked, and the inter-axle wheel lock is kept in an unlocked state.

Specifically, the second parameter information may include: the vehicle speed, the transfer case state and the unlocking state of the lock between the middle rear axle shafts; the corresponding second preset locking condition may be: and when the vehicle speed is less than a second vehicle speed threshold value, the gear state of the transfer case is in a second preset gear, and the unlocking state of the inter-axle lock of the middle and rear axles is in a locking state, controlling the inter-axle lock of the middle axle to enter the locking state.

For example, the second vehicle speed threshold may be different from the first vehicle speed threshold, or the same, for example, set to 5km/h; the second preset gear may be different from or the same as the first preset gear, for example, set to 6H or 6L mode. That is, when the vehicle speed is less than 5km/H, the transfer gear state is in the 6H or 6L mode, and the unlocked state of the inter-axle lock of the middle rear axle is in the locked state, the inter-axle lock of the middle axle is controlled to enter the locked state.

It should be noted that although the middle axle of the six-wheel motor vehicle has no wheel speed sensor, the wheel speed acquisition of the middle axle cannot be realized, but the effective control of the lock between the wheels of the middle axle can be realized by judging the unlocking and locking state of the lock between the vehicle speed, the transfer case state and the middle rear axle shaft without additionally arranging the wheel speed sensors on the left and right wheels of the middle axle, so that the occurrence of the failure phenomenon of the lock between the wheels of the middle axle is avoided.

S104: and when the target differential lock is the rear axle inter-wheel lock, acquiring third parameter information, and controlling the rear axle inter-wheel lock to enter a locking state based on the third parameter information.

In this embodiment, for the rear axle inter-wheel lock, third parameter information corresponding to the rear axle inter-wheel lock may be acquired, and it is determined whether the third parameter information satisfies a third preset locking condition, if so, the rear axle inter-wheel lock is controlled to be locked, otherwise, the rear axle inter-wheel lock is not controlled to be locked, and the rear axle inter-wheel lock is maintained in an unlocked state.

Specifically, the third parameter information may include: the speed, the left wheel speed of the rear axle, the right wheel speed of the rear axle, the state of a transfer case and the unlocking and locking state of the lock between the shafts of the middle rear axle; the corresponding third preset locking condition may be: the vehicle speed is less than a third vehicle speed threshold value, the wheel speed difference between the left wheel speed of the rear axle and the right wheel speed of the rear axle is less than a second wheel speed threshold value, the gear state of the transfer case is in a third preset gear, and the unlocking state of the lock between the shafts of the middle and rear axles is in a locking state.

For example, the third vehicle speed threshold may be different from the first vehicle speed threshold and the second vehicle speed threshold, or may be the same, for example, set to 5km/h; the second wheel speed threshold may be the same as the first wheel speed threshold or may be different, such as being set at 50rpm; the third preset gear may be different from the first preset gear and the second preset gear, or may be the same, for example, set to 6H or 6L mode. That is, when the vehicle speed is less than 5km/H, the wheel speed difference between the rear axle left wheel speed and the rear axle right wheel speed is less than 50rpm, the transfer gear state is in the 6H or 6L mode, and the unlocked state of the inter-rear axle lock is in the locked state, the inter-rear axle lock is controlled to enter the locked state.

S105: and when the target differential lock is the front axle inter-wheel lock, acquiring fourth parameter information, and controlling the front axle inter-wheel lock to enter a locking state based on the fourth parameter information.

In this embodiment, for the front axle inter-wheel lock, fourth parameter information corresponding to the front axle inter-wheel lock may be acquired, and it is determined whether the fourth parameter information satisfies a fourth preset locking condition, if so, the front axle inter-wheel lock is controlled to be locked, otherwise, the front axle inter-wheel lock is not controlled to be locked, and the front axle inter-wheel lock is kept in an unlocked state.

Specifically, the fourth parameter information may include: the method comprises the following steps of (1) vehicle speed, front axle left wheel speed, front axle right wheel speed, a transfer case state, an unlocking state of a lock between middle and rear axle shafts, an unlocking state of a lock between middle axle wheels and an unlocking state of a lock between rear axle wheels; the corresponding fourth preset locking condition may be: the speed of the vehicle is less than a fourth vehicle speed threshold value, the wheel speed difference between the left wheel speed of the front axle and the right wheel speed of the front axle is less than a third wheel speed threshold value, the gear state of the transfer case is in a fourth preset gear, the unlocking state of the inter-axle lock of the middle and rear axles is in a locking state, the unlocking state of the inter-axle lock of the middle axle is in a locking state, and the unlocking state of the inter-axle lock of the rear axle is in a locking state.

For example, the fourth vehicle speed threshold may be different from the first vehicle speed threshold, the second vehicle speed threshold, and the third vehicle speed threshold, or may be the same, for example, set to 5km/h; the third wheel speed threshold may be the same as the first wheel speed threshold and the second wheel speed threshold, or may be different, for example, set to 50rpm; the third preset gear may be set to the 6L mode. That is, the rear axle inter-wheel lock is controlled to enter the locked state when the vehicle speed is less than 5km/h, the wheel speed difference between the left wheel speed of the front axle and the right wheel speed of the front axle is less than 50rpm, the transfer gear state is in the 6L mode, the unlocked state of the middle rear axle inter-shaft lock is in the locked state, the unlocked state of the middle axle inter-wheel lock is in the locked state, and the unlocked state of the rear axle inter-wheel lock is in the locked state.

It should be noted that, since the front axle inter-wheel lock affects the steering performance of the vehicle, if it is locked by mistake, it may cause serious driving safety, and therefore, only when all of the middle rear axle inter-shaft lock, the middle axle inter-wheel lock, and the rear axle inter-wheel lock are locked, the front axle inter-wheel lock is allowed to be locked, so as to ensure driving safety.

In the embodiment, different locking conditions are respectively set for the front axle inter-wheel lock, the middle axle inter-wheel lock, the rear axle inter-wheel lock and the rear axle inter-shaft lock, so that the target differential lock is controlled to enter a locking state only when the parameter information corresponding to the target differential lock meets the corresponding locking conditions, not only is the locking control of the middle axle inter-wheel lock and the rear axle inter-shaft lock in the six-wheel motor vehicle realized, but also all the differential locks can work in a coordinated manner, the safety of the six-wheel motor vehicle differential lock control system is integrally improved, the problem of misoperation is effectively avoided, and the trapped-escaping effect and the driving safety of the six-wheel motor vehicle are further ensured.

In one possible embodiment, the six-wheel vehicle differential lock control method may further include the steps of:

s201: and under the condition that the target differential lock enters a locking state, acquiring the current vehicle speed.

S202: and judging whether the current vehicle speed is greater than or equal to a fifth vehicle speed threshold value and less than or equal to a sixth vehicle speed threshold value.

S203: if yes, outputting overspeed alarm information of the target differential lock.

In the embodiment, after the target differential lock meets the corresponding locking condition and enters the locking state, the current speed of the vehicle is monitored in real time, so that the potential safety hazard caused by the fact that the vehicle runs at a higher speed in the locking state of the target differential lock is avoided.

For example, the fifth vehicle speed threshold may be set at 30km/h and the sixth vehicle speed threshold may be set at 40km/h. That is, when the condition that the current vehicle speed is less than or equal to 30km/h and less than or equal to 40km/h is met, overspeed alarm information of the target differential lock is output. Specifically, the indication lamp corresponding to the target differential lock flickers or the vehicle-mounted display screen is used for carrying out text prompt and giving a warning in a way of alarming sound so as to prompt the driver to carry out deceleration operation.

In one possible embodiment, after S203, the six-wheel vehicle differential lock control method may further include the steps of:

s204: and when the current vehicle speed is reduced to be lower than a fifth vehicle speed threshold value, releasing the overspeed warning information.

S205: and when the current vehicle speed is increased to be higher than the sixth vehicle speed threshold value, controlling the target differential lock to unlock.

In the embodiment, taking the fifth vehicle speed threshold value as 30km/h and the sixth vehicle speed threshold value as 40km/h as an example, after overspeed warning information of the target differential lock is output, if a driver takes a deceleration measure to reduce the current vehicle speed of the vehicle to be less than 30km/h, such as 28km/h, the overspeed warning information is released; and if the driver does not take a speed reduction measure and the current speed of the vehicle is increased to be higher than 40km/h, controlling the target differential lock to automatically unlock so as to ensure the driving safety and avoid potential safety hazards caused by the fact that the vehicle runs at a higher speed in a locked state by the target differential lock.

s301: and responding to an unlocking instruction aiming at the middle and rear axle inter-axle lock, and controlling the middle and rear axle inter-axle lock, the front axle inter-wheel lock, the middle axle inter-wheel lock and the rear axle inter-wheel lock to be unlocked.

S302: and controlling the middle axle inter-wheel lock and the front axle inter-wheel lock to be unlocked in response to an unlocking instruction for the middle axle inter-wheel lock.

S303: and controlling the rear axle inter-wheel lock and the front axle inter-wheel lock to be unlocked in response to an unlocking instruction for the rear axle inter-wheel lock.

In this embodiment, a "follow unlock" function will be provided. When the differential lock with lower safety priority is unlocked, the differential lock with higher safety priority than the differential lock automatically follows the unlocking, so that the complicated operation of a user is reduced, and the use experience of the user is improved.

In this embodiment, the security priorities may be ordered as: the lock between the middle axle shaft and the rear axle shaft is less than the lock between the middle axle wheels, the lock between the rear axle wheels is less than the lock between the front axle wheels. That is, when an unlocking instruction for the middle-rear axle inter-axle lock is received, the middle-rear axle inter-axle lock is unlocked, and the front axle inter-wheel lock, the middle axle inter-wheel lock and the rear axle inter-wheel lock are unlocked along with the unlocking; when an unlocking instruction for the intermediate axle inter-wheel lock or the rear axle inter-wheel lock is received, the front axle inter-wheel lock will be unlocked following the intermediate axle inter-wheel lock or the rear axle inter-wheel lock itself.

In a second aspect, based on the same inventive concept, an embodiment of the present application provides a six-wheel vehicle differential lock control device 200, where the six-wheel vehicle differential lock control device 200 includes:

a locking instruction obtaining module 201, configured to obtain a locking instruction of a target differential lock; the target differential lock is a front axle inter-wheel lock, a middle axle inter-wheel lock, a rear axle inter-wheel lock or a middle-rear axle inter-shaft lock; (ii) a

The middle-rear axle inter-axle lock control module 202 is used for acquiring first parameter information when the target differential lock is the middle-rear axle inter-axle lock, and controlling the middle-rear axle inter-axle lock to enter a locked state based on the first parameter information;

the intermediate axle inter-wheel lock control module 203 is used for acquiring second parameter information when the target differential lock is an intermediate axle inter-wheel lock, and controlling the intermediate axle inter-wheel lock to enter a locked state based on the second parameter information;

the rear axle inter-wheel lock control module 204 is configured to, when the target differential lock is a rear axle inter-wheel lock, acquire third parameter information and control the rear axle inter-wheel lock to enter a locked state based on the third parameter information;

and the front axle inter-wheel lock control module 205 is configured to, when the target differential lock is a front axle inter-wheel lock, acquire fourth parameter information, and control the front axle inter-wheel lock to enter a locked state based on the fourth parameter information.

In one possible embodiment, the first parameter information includes: the speed, the speed of a front axle wheel, the speed of a rear axle wheel and the gear state of a transfer case;

the inter-axle lock control module 202 is specifically configured to control the inter-axle lock of the middle and rear axles to enter a locked state when the vehicle speed is less than a first vehicle speed threshold, a wheel speed difference between a front axle wheel speed and a rear axle wheel speed is less than a first wheel speed threshold, and a gear state of the transfer case is in a first preset gear.

In one possible embodiment, the second parameter information includes: the vehicle speed, the transfer case state and the unlocking state of the lock between the middle and rear axle shafts;

the middle axle inter-wheel lock control module 203 is specifically configured to control the middle axle inter-wheel lock to enter a locked state when the vehicle speed is less than a second vehicle speed threshold, the transfer case gear state is in a second preset gear, and the unlocking state of the middle and rear axle inter-shaft lock is in a locked state.

In one possible embodiment, the third parameter information includes: the speed, the left wheel speed of the rear axle, the right wheel speed of the rear axle, the state of a transfer case and the unlocking and locking state of the lock between the shafts of the middle rear axle;

the rear axle inter-wheel lock control module 204 is specifically configured to control the rear axle inter-wheel lock to enter a locked state when the vehicle speed is less than a third vehicle speed threshold, a wheel speed difference between a left wheel speed of the rear axle and a right wheel speed of the rear axle is less than a second wheel speed threshold, the gear state of the transfer case is in a third preset gear, and the unlocking state of the middle rear axle inter-shaft lock is in the locked state.

In one possible embodiment, the fourth parameter information includes: the method comprises the following steps of (1) vehicle speed, front axle left wheel speed, front axle right wheel speed, a transfer case state, an unlocking state of a lock between middle and rear axle shafts, an unlocking state of a lock between middle axle wheels and an unlocking state of a lock between rear axle wheels;

the front axle inter-wheel lock control module 205 is specifically configured to control the front axle inter-wheel lock to enter a locked state when a vehicle speed is less than a fourth vehicle speed threshold, a wheel speed difference between a left wheel speed of the front axle and a right wheel speed of the front axle is less than a third vehicle speed threshold, a gear state of the transfer case is in a fourth preset gear, an unlocking state of the middle and rear axle inter-shaft lock is in a locked state, an unlocking state of the middle axle inter-wheel lock is in a locked state, and an unlocking state of the rear axle inter-wheel lock is in a locked state.

In one possible embodiment, the six-wheel vehicle differential lock control device 200 further includes:

the current vehicle speed obtaining module is used for obtaining the current vehicle speed under the condition that the target differential lock enters a locking state;

and the overspeed alarm module is used for outputting overspeed alarm information of the target differential lock when the current vehicle speed is greater than or equal to the fifth vehicle speed threshold and less than or equal to the sixth vehicle speed threshold.

the alarm releasing module is used for releasing overspeed alarm information when the current vehicle speed is reduced to be lower than a fifth vehicle speed threshold value after the overspeed alarm information of the target differential lock is output;

and the automatic unlocking module is used for controlling the target differential lock to unlock when the current vehicle speed is increased to be higher than a sixth vehicle speed threshold value.

the first following unlocking module is used for responding to an unlocking instruction aiming at the lock between the middle axle shaft and the rear axle shaft and controlling the lock between the middle axle shaft and the rear axle shaft, the lock between the front axle wheels, the lock between the middle axle wheels and the lock between the rear axle wheels to be unlocked; (ii) a

The second following unlocking module is used for responding to an unlocking instruction aiming at the middle axle inter-wheel lock and controlling the middle axle inter-wheel lock and the front axle inter-wheel lock to be unlocked;

It should be noted that, for the specific implementation of the six-wheel vehicle differential lock control device 200 according to the embodiment of the present application, reference is made to the specific implementation of the six-wheel vehicle differential lock control method provided in the first aspect of the embodiment of the present application, and details are not described herein again.

In a third aspect, based on the same inventive concept, embodiments of the present application provide a vehicle, including a processor and a memory, where the memory stores machine executable instructions capable of being executed by the processor, and the processor is configured to execute the machine executable instructions to implement the six-wheel motor vehicle differential lock control method according to the first aspect of the present application.

It should be noted that, for the specific implementation of the vehicle according to the embodiment of the present application, reference is made to the specific implementation of the six-wheel motor vehicle differential lock control method provided in the foregoing first aspect of the embodiment of the present application, and details are not described herein again.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.

Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "include", "including" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or terminal device including a series of elements includes not only those elements but also other elements not explicitly listed or inherent to such process, method, article, or terminal device. Without further limitation, an element defined by the phrases "comprising one of 8230 \8230;" does not exclude the presence of additional like elements in a process, method, article, or terminal device that comprises the element.

The six-wheel motor vehicle differential lock control method, the six-wheel motor vehicle differential lock control device and the six-wheel motor vehicle provided by the invention are described in detail, specific examples are applied in the description to explain the principle and the implementation mode of the invention, and the description of the examples is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A six-wheel motor vehicle differential lock control method is characterized by comprising the following steps:

when the target differential lock is the intermediate and rear axle inter-axle lock, acquiring first parameter information, and controlling the intermediate and rear axle inter-axle lock to enter a locking state based on the first parameter information; (ii) a Or the like, or, alternatively,

when the target differential lock is the rear axle inter-wheel lock, acquiring third parameter information, and controlling the rear axle inter-wheel lock to enter a locked state based on the third parameter information; or, the first and second electrodes are connected with each other,

2. The six-wheeled motor vehicle differential lock control method according to claim 1, wherein the first parameter information includes: the speed, the speed of a front axle wheel, the speed of a rear axle wheel and the gear state of a transfer case;

based on the first parameter information, controlling the lock between the middle and rear axle shafts to enter a locking state, and the method comprises the following steps:

3. The six-wheeled motor vehicle differential lock control method according to claim 1, wherein the second parameter information includes: the locking and unlocking state of the lock between the middle rear axle shafts is realized;

4. The six-wheeled motor vehicle differential lock control method according to claim 1, wherein the third parameter information includes: the locking and unlocking state of the lock between the middle rear axle shafts is realized by the speed of the vehicle, the left wheel speed of the rear axle, the right wheel speed of the rear axle;

5. The six-wheeled motor vehicle differential lock control method according to claim 1, wherein the fourth parameter information includes: the locking and unlocking state of the lock between the middle axle wheels and the lock between the rear axle wheels;

when the vehicle speed is less than a fourth vehicle speed threshold value, the wheel speed difference between the left wheel speed of the front axle and the right wheel speed of the front axle is less than a third wheel speed threshold value, the gear state of the transfer case is in a fourth preset gear, the unlocking state of the inter-axle lock of the middle and rear axles is in a locking state, the unlocking state of the inter-wheel lock of the middle axle is in a locking state, and the unlocking state of the inter-wheel lock of the rear axle is in a locking state, the inter-wheel lock of the front axle is controlled to enter the locking state.

6. The six-wheeled motor vehicle differential lock control method according to claim 1, characterized in that the method further comprises:

7. The six-wheeled motor vehicle differential lock control method according to claim 6, characterized in that after the overspeed warning information of the target differential lock is output, the method further comprises:

when the current vehicle speed is reduced to be lower than the fifth vehicle speed threshold value, the overspeed alarm information is removed; or the like, or a combination thereof,

8. The six-wheeled motor vehicle differential lock control method according to claim 1, characterized in that the method further comprises:

9. A six-wheel motor vehicle differential lock control device is characterized by comprising:

10. A vehicle comprising a processor and a memory, the memory storing machine executable instructions executable by the processor for executing the machine executable instructions to implement the six-wheel motor vehicle differential lock control method of any one of claims 1-8.