CN114562551A - Differential lock control method and device - Google Patents

Abstract

The invention provides a differential lock control method and device, and relates to the technical field of vehicles. The method comprises the following steps: acquiring the current environmental information and the engine load state of the vehicle under the condition that the differential lock is unlocked; and when the environmental information and the engine load state meet the preset condition of the engagement of the differential lock part, reducing the engine load. In the application, when judging that the current environmental information and the engine load state of the vehicle meet the preset condition of partial meshing of the differential lock, the engine load is reduced, the working condition of the accelerator is simulated by utilizing the generated reverse torque, and the locking ring and the locking gear of the differential lock are completely meshed, so that the parts of the differential lock are protected.

Description

A differential lock control method and device

technical field

The present invention relates to the technical field of vehicles, in particular to a differential lock control method and device.

Background technique

With the development of the automobile industry, the application of differential locks in vehicles is becoming more and more common in order to realize the vehicle's rescue.

In the prior art, when the vehicle needs to get out of trouble, the driver presses the differential lock control switch, steps on the accelerator to make the vehicle move, and uses the electromagnetic coil to attract the cam disc, so that the cam disc pushes the ejector rod, allowing the ejector to move. The rod pushes the locking ring to lock, so that the differential lock casing, the locking ring and the locking gear are connected as a whole, so as to realize the whole vehicle out of trouble. However, the inventor found that there are at least the following problems in the prior art: the condition for realizing the differential lock function is that the vehicle needs to move, and when the vehicle wants to get out of trouble on a slope, the driver usually continues to step on the accelerator pedal with a large accelerator. , so that the generated torque is very large, so that the locking ring and the locking gear may be partially meshed and cannot be meshed in place, resulting in a large friction between the parts, which in turn leads to damage to the parts.

SUMMARY OF THE INVENTION

In view of this, the present invention aims to provide a differential lock control method and device, so as to solve the problem in the prior art that continuous high throttle makes the locking mechanism of the differential lock not locked in place, resulting in damage to the components of the differential lock The problem.

In order to achieve the above object, the technical scheme of the present invention is achieved in this way:

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

When the differential lock is turned on, obtain the current environmental information and engine load status of the vehicle;

The engine load is reduced when the environmental information and the engine load state meet a preset condition for partial engagement of the differential lock.

Preferably, the reducing the engine load when the environmental information and the engine load state meet a preset condition for partial engagement of the differential lock, comprising:

In the case that the environmental information complies with a preset environmental condition, and the engine load state is a fully compliant state and the duration is longer than a preset duration, the engine load is reduced.

Preferably, the environmental information includes a gradient value, and the engine load state includes: an accelerator opening value and a duration corresponding to the accelerator opening value;

The reducing the engine load when the environmental information meets the preset environmental conditions, and the engine load state is a fully compliant state and the duration is longer than the preset duration, includes:

When the gradient value is greater than or equal to a preset gradient threshold value, and the accelerator opening degree value is equal to a preset accelerator opening degree threshold value, and the duration of the accelerator opening degree value is greater than a preset time period, reduce the Throttle opening value to preset range.

Preferably, when the differential lock is turned on, before acquiring the current environmental information and engine load state of the vehicle, the method further includes:

When the environmental information and the engine load state do not meet the preset conditions for partial engagement of the differential lock, the engine load is not limited.

Preferably, it also includes:

Get the differential lock open command;

The differential lock is unlocked in response to the differential lock unlock command.

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

The first acquisition module is used to acquire the current environmental information and engine load state of the vehicle when the differential lock is turned on;

The first adjustment module is used for reducing the engine load when the environmental information and the engine load state meet a preset condition for partially engaging the differential lock.

Preferably, the first adjustment module is specifically configured to reduce the engine load when the environmental information complies with a preset environmental condition, and the engine load state is a fully compliant state and the duration is longer than a preset duration.

Preferably, the environmental information includes a gradient value, and the engine load state includes: an accelerator opening value and a duration corresponding to the accelerator opening value;

The first adjustment module is specifically configured to be used when the gradient value is greater than or equal to a preset gradient threshold value, and the accelerator opening degree value is equal to the preset accelerator opening degree threshold value, and the duration of the accelerator opening degree value is greater than or equal to In the case of a preset time period, the accelerator opening value is reduced to a preset range.

In a third aspect, an embodiment of the present invention further provides an electronic device, including a processor, a memory, and a program or instruction stored in the memory and executable on the processor, the program or instruction being The processor implements the steps of the aforementioned differential lock control method when executed.

In a fourth aspect, an embodiment of the present application further provides a readable storage medium, where a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the aforementioned differential lock control method are implemented .

In the embodiment of the present invention, the current environment information and engine load state of the vehicle are obtained when the differential lock is turned on; when the environment information and the engine load state meet the preset conditions for partial engagement of the differential lock , reduce the engine load. In the present invention, when it is determined that the current environmental information of the vehicle and the engine load state meet the preset conditions for the partial engagement of the differential lock, the engine load is reduced, and the generated reverse torque is used to simulate the working condition of the vehicle when the accelerator is closed, so that the differential The locking ring of the lock and the locking gear are fully meshed to protect the differential lock components.

Description of drawings

The accompanying drawings constituting a part of the present invention are used to provide further understanding of the present invention, and the exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic structural diagram of a differential lock provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of an engaged state of a differential lock provided by an embodiment of the present invention;

3 is a flowchart of a differential lock control method provided by an embodiment of the present invention;

4 is a flowchart of another differential lock control method provided by an embodiment of the present invention;

5 is a structural block diagram of a differential lock control device provided by an embodiment of the present invention;

6 is a structural block diagram of an electronic device according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention.

Description of reference numerals

01- Solenoid coil, 02- Cam disc, 03- Ejector rod, 04- Locking ring, 05- Locking gear, 06- Return spring, 07- Housing.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Before introducing the present invention, the working principle of the differential lock is explained:

The differential lock is an indispensable accessory in the vehicle to realize the rescue of the whole vehicle. Referring to FIG. 1 , a schematic structural diagram of a differential lock is shown. When the vehicle needs to get out of trouble, for example, when one wheel slips and the vehicle cannot move forward, the driver can press the differential lock control switch and step on the accelerator to move the vehicle. The ECU (Electronic Control Unit) outputs an electrical signal, and the electromagnetic coil 01 of the differential lock is energized, so that the electromagnetic coil 01 attracts the cam disc 02. The pedaling of the accelerator will make the vehicle move, and the power generated by the car engine will cause the differential lock to rotate. Since the cam disc 02 is connected to the differential lock housing 07, when the differential lock rotates, it will drive the ejector rod 03 to rotate accordingly, thereby utilizing The concave-convex structure of the cam plate 02 pushes the ejector rod 03 to slide, so that the ejector rod 03 further pushes the locking ring 04, so that the inner splines of the locking ring 04 mesh with the outer splines of the locking gear 05, and the outer splines of the locking ring 04 are engaged. The splines are matched with the grooves of the housing 07 of the differential lock, so that the housing 07 of the differential lock, the locking ring 04 and the locking gear 05 are connected as a whole. Since the locking gear 05 is connected with the axle (the axle structure is not shown in the figure), the wheels on both sides are integrated, and the power on one side of the slipping wheel can be transmitted to the wheel with grip on the other side, so as to realize The whole car got out of trouble. After the vehicle is out of trouble, the driver can press the differential lock control switch again, so that the ECU stops outputting electrical signals, so that the electromagnetic coil 01 of the differential lock is powered off and the return spring 06 pushes out the locking ring 04, thereby closing the locking Function.

It should be noted that the structure of the differential lock of the drive axle is shown in FIG. 1 of the present application. Since the principles of various types of differential locks are similar, those skilled in the art may also refer to the structures of other types of differential locks, which are not limited in this application.

However, the inventor found in the specific implementation process that to realize the locking function of the differential lock, only when the vehicle is moving can the differential lock be driven to rotate and push the ejector rod to slide, so that the locking ring and the locking gear are fully meshed, thereby achieve normal locking. However, if the environment where the vehicle is trapped is on a slope, in order to get out of the trap, the driver usually accelerates with full throttle after pressing the differential lock switch. The frictional force between them increases, and partial locking occurs. And because the locking ring and the locking gear are not fully engaged, the torque is not enough to support the vehicle to move forward, and the reverse causes the driver to continue to step on the accelerator vigorously, and even lead to the phenomenon of tooth dislocation between the locking ring and the locking gear. In the state of continuous high throttle, the large torque will also cause damage to the locking ring and the locking gear. Referring to FIG. 2 , a schematic diagram of the engagement state of the differential lock is shown. Among them, (a) is a schematic illustration of the partial meshing of the locking ring and the locking gear. In the case of continuous partial meshing, the problem of damage to the locking ring and the locking gear is likely to occur due to mutual friction. (b) It is an indication that the locking ring and the locking gear are fully engaged. In the case of full engagement, the locking ring and the locking gear are normally matched, and there will be no damage caused by the friction between the locking ring and the locking gear. question.

Therefore, the inventor of the present application proposes the following idea: when the differential lock is turned on, the current environmental information and engine load state of the vehicle can be obtained, and by judging whether the current environmental information and engine load state satisfy the differential lock part Preset conditions of engagement to determine whether the differential lock is partially engaged or fully engaged in the current situation, and reduces engine load when partially engaged. Since the reduction of the engine load can be indirectly reflected in the reduction of the throttle opening value, the reverse torque is generated to fully mesh the lock ring and the lock gear, and the protection of the differential lock components can be achieved.

The details are as follows:

Referring to FIG. 3 , a flowchart of a differential lock control method provided by an embodiment of the present invention is shown.

Step S101: in the case that the differential lock is turned on, obtain the current environmental information and engine load status of the vehicle;

In this application, when the differential lock is in the open state, it means that the vehicle has the need to get out of trouble for the whole vehicle at this time. To realize the escape of the whole vehicle, the differential lock needs to realize the locking function, which is prone to the above-mentioned problems. Partial engagement of the locking ring and locking gear causing damage to parts.

Specifically, the vehicle ECU acquires the current environment information of the vehicle and the current engine load state of the vehicle. Wherein, the environmental information includes: a slope value. The engine load state includes: the accelerator opening value and the duration of the corresponding accelerator opening value. Among them, the gradient value can reflect whether the vehicle is currently on a slope, and the steepness of the slope of the slope on which it is located. The accelerator opening value can reflect the degree to which the driver steps on the accelerator, indirectly reflects the current load of the engine, and can reflect whether the engine is currently in a full load state. The duration of the accelerator opening value may reflect the length of time that the driver steps on the accelerator under the corresponding accelerator opening value.

Step S102: When the environmental information and the engine load state meet the preset conditions for partial engagement of the differential lock, reduce the engine load.

In the present application, a preset condition for judging whether the differential lock is partially engaged is preset. As long as the vehicle ECU determines that the environmental information and the engine load state meet the preset conditions at the same time, it means that the differential lock is in the current situation, and the locking ring and the locking gear may be partially meshed, so the engine load will be reduced, indirectly. It is reflected in reducing the throttle opening value, simulating the working condition of the driver closing the accelerator, so as to generate a reverse torque, and use the reverse torque to make the locking ring and the locking gear fully meshed.

To sum up, in the embodiment of the present invention, the current environmental information and engine load state of the vehicle are obtained when the differential lock is turned on; when the environmental information and the engine load state conform to the pre-set differential lock partially engaged When conditions are set, reduce the engine load. In the present invention, when it is determined that the current environmental information of the vehicle and the engine load state meet the preset conditions for the partial engagement of the differential lock, the engine load is reduced, and the generated reverse torque is used to simulate the working condition of the vehicle when the accelerator is closed, so that the differential The locking ring of the lock and the locking gear are fully meshed to protect the differential lock components.

Referring to FIG. 4 , a flowchart of another differential lock control method provided by an embodiment of the present invention is shown.

Step S201: obtaining a differential lock opening instruction;

In practical applications, the opening of the differential lock is triggered by the driver. When the driver observes the surrounding environment and finds that the vehicle is trapped and cannot move, he triggers the differential lock switch to make the differential lock realize the locking function. The differential lock opening command can be obtained.

Step S202: in response to the differential lock open command, open the differential lock;

Specifically, the ECU outputs an electrical signal to drive the electromagnetic coil of the differential lock to attract the cam disc, push the top rod, and let the top rod push the locking ring to generate displacement to realize the locking function.

Step S203: when the differential lock is turned on, obtain the current environmental information and engine load status of the vehicle;

Specifically, the environmental information includes a gradient value, and the engine load state includes: an accelerator opening degree value and a duration corresponding to the accelerator opening degree value. For example, the gradient value of the current slope of the vehicle is 30%, the current engine load of the vehicle, that is, the accelerator opening value is 100%, and the duration of obtaining the accelerator opening value of 100% is 5s.

In the present application, after the differential lock is opened, the locking ring and the locking gear of the differential lock start to mesh. At this time, after obtaining the current environmental information and engine load state of the vehicle, it can be determined whether the locking ring and locking gear of the differential lock are currently in a partially meshed state with a high probability, and if they are in a partially meshed state, go to step S204. On the other hand, when it is not in the partially meshed state, the process proceeds to step S205.

Step S204: in the case that the environmental information meets the preset environmental conditions, and the engine load state is a fully compliant state and the duration is longer than the preset duration, reduce the engine load;

In this application, the preset environmental conditions include: the gradient value is greater than or equal to a preset gradient threshold value. Specifically, the preset gradient threshold may be set to 20%. The engine full load state includes: the accelerator opening value is equal to the preset accelerator opening threshold value, and the duration is longer than the preset duration. Specifically, the preset throttle opening threshold may be set to 100%, and the preset duration may be set to 1s.

Optionally, the above step S204 may include: when the gradient value is greater than or equal to a preset gradient threshold value, and the accelerator opening degree value is equal to the preset accelerator opening degree threshold value, and the duration of the accelerator opening degree value is greater than or equal to In the case of a preset time period, the accelerator opening value is reduced to a preset range.

In this application, only when the gradient value, the accelerator opening value, and the duration of the accelerator opening value satisfy the respective preset conditions at the same time, the accelerator opening value is reduced to the preset range. Among them, the preset range can be set as the accelerator pedal opening value is 80%.

Exemplarily, the obtained gradient value of the current ramp of the vehicle is 30%, the current accelerator opening value of the vehicle is 100%, and the duration of obtaining the accelerator opening value of 100% is 5s. At this time, the gradient value is greater than the preset gradient threshold value by 20%, the accelerator opening degree value is equal to the preset accelerator opening degree threshold value of 100%, and when the accelerator opening degree value is 100%, the duration is longer than the preset duration 1S. It means that the slope on which the vehicle target is located is relatively steep, and the vehicle is continuously in a full throttle state, and the current vehicle state has the possibility that the locking ring and the locking gear are partially meshed to cause damage to the parts. Therefore, reduce the throttle opening value from 100% to 80%, and use the generated reverse torque to simulate the working condition of the vehicle when the vehicle is closed, so that the locking ring of the differential lock and the locking gear are fully meshed to realize the differential lock. Protection of parts.

Step S205: When the environmental information and the engine load state do not meet the preset conditions for partial engagement of the differential lock, the engine load is not limited.

In this application, as long as any one of the gradient value, the accelerator opening value, and the duration of the accelerator opening value does not meet the respective preset conditions, it means that the current state of the vehicle does not meet the preset differential lock partially engaged Under certain conditions, the locking ring of the differential lock and the locking gear can be fully meshed at this time, and there will be no damage to the parts, so the load of the engine is not limited, and the size of the throttle opening value is not limited, and it can be driven normally.

Optionally, before step S201, the following steps may also be included:

Obtain the current gear information of the vehicle, and determine whether the gear information is neutral;

When the gear position information is not neutral, step S201 is entered.

In this application, the gear position information of the vehicle can be judged, and when it is not in neutral gear, it means that the driving wheel of the vehicle provides driving force, so that the conditions for locking the differential lock are met.

To sum up, in the embodiment of the present invention, the differential lock opening command is obtained by obtaining the differential lock opening command; the differential lock is turned on in response to the differential lock opening command; and the current environment information of the vehicle is obtained when the differential lock is turned on. and the engine load state; when the environmental information and the engine load state meet a preset condition for partially engaging the differential lock, reduce the engine load. In the present invention, when it is determined that the current environmental information of the vehicle and the engine load state meet the preset conditions for the partial engagement of the differential lock, the engine load is reduced, and the generated reverse torque is used to simulate the working condition of the vehicle when the accelerator is closed, so that the differential The locking ring of the lock and the locking gear are fully meshed to protect the differential lock components.

Referring to FIG. 5, a structural block diagram of a differential lock control device 500 provided by an embodiment of the present invention is shown, and the device 500 includes the following modules:

The first obtaining module 501 is used to obtain the current environmental information and engine load state of the vehicle when the differential lock is turned on;

The first adjustment module 502 is configured to reduce the engine load when the environmental information and the engine load state meet a preset condition for partial engagement of the differential lock.

Optionally, the first adjustment module 502 is specifically configured to reduce the engine load when the environmental information meets a preset environmental condition, and the engine load state is a fully compliant state and the duration is longer than a preset duration. .

Optionally, the environmental information includes a gradient value, and the engine load state includes: an accelerator opening value and a duration corresponding to the accelerator opening value;

Optionally, the first adjustment module 502 is specifically configured to be used when the gradient value is greater than or equal to a preset gradient threshold value, and the accelerator opening degree value is equal to the preset accelerator opening degree threshold value, and the accelerator opening In the case that the duration of the degree value is longer than a preset duration, the accelerator opening degree value is reduced to a preset range.

Optionally, the apparatus 500 further includes:

A second adjustment module, configured to not limit the engine load when the environmental information and the engine load state do not meet a preset condition for partially engaging the differential lock.

Optionally, the apparatus 500 further includes:

The second acquisition module is used to acquire the differential lock opening instruction;

A response module, configured to open the differential lock in response to the differential lock opening command.

To sum up, in the embodiment of the present invention, the current environmental information and engine load state of the vehicle are obtained when the differential lock is turned on; when the environmental information and the engine load state conform to the pre-set differential lock partially engaged When conditions are set, reduce the engine load. In the present invention, when it is determined that the current environmental information of the vehicle and the engine load state meet the preset conditions for the partial engagement of the differential lock, the engine load is reduced, and the generated reverse torque is used to simulate the working condition of the vehicle when the accelerator is closed, so that the differential The locking ring of the lock and the locking gear are fully meshed to protect the differential lock components.

6 , an embodiment of the present invention further provides an electronic device 600, including a processor 602, a memory 601, and a computer program or instruction stored on the memory 601 and executable on the processor 602, the program Or, when the instruction is executed by the processor 602, each process of the above-mentioned differential lock control method can be realized, and the same technical effect can be achieved. In order to avoid repetition, details are not repeated here.

Referring to FIG. 7 , a schematic diagram of the hardware structure of an electronic device implementing the present application is shown.

The electronic device 700 includes but is not limited to: a radio frequency unit 701, a network module 702, an audio output unit 703, an input unit 704, a sensor 705, a display unit 706, a user input unit 707, an interface unit 708, a memory 709, and a processor 710, etc. part.

Those skilled in the art can understand that the electronic device 700 may also include a power source (such as a battery) for supplying power to various components, and the power source may be logically connected to the processor 710 through a power management system, so as to manage charging, discharging, and power management through the power management system. consumption management and other functions. The structure of the electronic device shown in FIG. 7 does not constitute a limitation on the electronic device. The electronic device may include more or less components than the one shown, or combine some components, or arrange different components, which will not be repeated here. .

Optionally, the present invention provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, each process of the above differential lock control method is implemented, and can To achieve the same technical effect, in order to avoid repetition, details are not repeated here.

Wherein, the processor is the processor in the electronic device described in the foregoing embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory (Read-Only Memory, ROM), a random access memory (Random Access Memory, RAM), a magnetic disk or an optical disk, and the like.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. a differential lock control method, is characterized in that, comprises: When the differential lock is turned on, obtain the current environmental information and engine load status of the vehicle; The engine load is reduced when the environmental information and the engine load state meet a preset condition for partial engagement of the differential lock. 2 . The method according to claim 1 , wherein the reducing the engine load when the environmental information and the engine load state meet a preset condition for partial engagement of a differential lock, comprising: 2 . In the case that the environmental information complies with a preset environmental condition, and the engine load state is a fully compliant state and the duration is longer than a preset time period, the engine load is reduced. 3. The method according to claim 2, wherein the environmental information comprises a gradient value, and the engine load state comprises: an accelerator opening value and a duration corresponding to the accelerator opening value; The reducing the engine load when the environmental information meets the preset environmental conditions, and the engine load state is a fully compliant state and the duration is longer than the preset duration, includes: When the gradient value is greater than or equal to a preset gradient threshold value, and the accelerator opening degree value is equal to a preset accelerator opening degree threshold value, and the duration of the accelerator opening degree value is greater than a preset time period, reduce the Throttle opening value to preset range. 4 . The method according to claim 1 , wherein, when the differential lock is turned on, before acquiring the current environmental information and engine load state of the vehicle, the method further comprises: 5 . When the environmental information and the engine load state do not meet the preset conditions for partial engagement of the differential lock, the engine load is not limited. 5. The method according to claim 1, further comprising: Get the differential lock open command; The differential lock is unlocked in response to the differential lock unlock command. 6. A differential lock control device, characterized in that, comprising: The first acquisition module is used to acquire the current environmental information and engine load state of the vehicle when the differential lock is turned on; The first adjustment module is used for reducing the engine load when the environmental information and the engine load state meet a preset condition for partial engagement of the differential lock. 7 . The device according to claim 6 , wherein the first adjustment module is specifically configured to be used when the environmental information meets a preset environmental condition, and the engine load state is a fully compliant state and the duration is longer than Reduce engine load for a preset duration. 8 . The device according to claim 7 , wherein the environmental information includes a gradient value, and the engine load state includes: an accelerator opening value and a duration corresponding to the accelerator opening value; 9 . The first adjustment module is specifically configured to be used when the gradient value is greater than or equal to a preset gradient threshold value, and the accelerator opening degree value is equal to the preset accelerator opening degree threshold value, and the duration of the accelerator opening degree value is greater than or equal to In the case of a preset time period, the accelerator opening value is reduced to a preset range. 9. An electronic device, characterized in that it comprises a processor, a memory, and a program or instruction that is stored on the memory and can be run on the processor, and the program or instruction is implemented when the processor is executed. The steps of the differential lock control method according to any one of claims 1-5. 10. A readable storage medium, wherein a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the differential speed according to any one of claims 1-5 is realized The steps of the lock control method.

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