Differential lock function detection system, method and device and vehicle

Abstract

The invention provides a differential lock function detection system, method and device and a vehicle. The system comprises an electromagnetic valve, an air pressure sensor, an air pipe, a differential lock air cylinder and a controller. The air pipe is connected with an air inlet of the differential lock cylinder through an electromagnetic valve; the electromagnetic valve transmits on-off signals of all gas paths to the controller; an air pressure sensor is arranged on the electromagnetic valve and used for detecting the air pressure from an air channel outlet of the electromagnetic valve to an air inlet of the axle differential lock air cylinder and transmitting the detected air pressure value to the controller. Through the arrangement of the system, a differential lock starting signal is adjusted from detecting on-off of a bridge end pressure switch to detecting on-off of a whole vehicle end electromagnetic valve air path and an air supply air pressure value, so that a pressure switch for detecting movement of a differential lock piston rod at the bridge end can be omitted, and water vapor generated after frequent wading due to the fact that the position of an axle pressure switch is too low is avoided; and finally, the condition that the whole vehicle line resistance reduction controller misjudges that the line is connected to cause false alarm is avoided, and the detection accuracy is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to a differential lock function detection system, method, device, and vehicle. Background Art

[0002] Due to the complex operating conditions of existing trucks, they are generally equipped with axle differential locks, which can be used to lock the left and right half-axles to transmit power when getting out of trouble in muddy roads and other conditions.

[0003] The mainstream trigger sensing mechanism of the differential lock in the market is: the air circuit of the control valve body is connected to supply air to the axle cylinder, which pushes the axle differential lock piston to move. After the piston rod moves, it finally triggers the pressure switch. The pressure switch changes from normally closed to open, and the signal is transmitted to the instrument through the wiring harness connected to the instrument on the axle pressure switch, and finally the instrument differential lock function light lights up.

[0004] The differential lock pressure switch is located on the grounded axle. On the actual construction site, there is a wading pool about 1 meter high. When crossing the wading pool, the switch will be soaked in muddy water for a long time. Therefore, some water vapor will be generated inside the switch port, causing the line resistance to decrease. The instrument logic judges that the pressure switch is connected and becomes a path, which transmits an erroneous display signal to the instrument. Summary of the invention

[0005] The present application provides a differential lock function detection system, method, device, and vehicle, which are used to prevent water vapor from entering the differential lock switch, avoid false triggering of the pressure switch, and ultimately achieve the effect of improving the accuracy of the differential lock function display.

[0006] In a first aspect, the present application provides a differential lock function detection system, comprising: a solenoid valve, an air pressure sensor, an air pipe, a differential lock cylinder and a controller;

[0007] One end of the air pipe is connected to the air source, and the other end is connected to the air inlet of the differential lock cylinder through the solenoid valve;

[0008] The solenoid valve is connected to the controller, and the solenoid valve transmits the on / off signals of all gas paths to the controller;

[0009] The air pressure sensor is provided on the solenoid valve and connected to the controller. The air pressure sensor is used to detect the air pressure from the air outlet of the solenoid valve to the air inlet of the differential lock cylinder, and transmit the detected air pressure value to the controller.

[0010] In a possible implementation, the solenoid valve is disposed on a vehicle frame or in an engine compartment.

[0011] In a possible implementation, the solenoid valve is respectively connected to the air inlet of the differential lock cylinder of the middle axle wheel differential, the air inlet of the differential lock cylinder of the middle axle shaft differential, and the air inlet of the differential lock cylinder of the rear axle wheel differential.

[0012] In one possible implementation, an air pressure sensor is provided between the solenoid valve and the air circuit of the differential lock cylinder of the middle axle wheel differential, an air pressure sensor is provided between the air circuit of the differential lock cylinder of the middle axle shaft differential, and an air pressure sensor is provided between the air circuit of the differential lock cylinder of the rear axle wheel differential.

[0013] In a second aspect, the present application provides a differential lock function detection method, which is applied to a controller in the differential lock function detection system described in any one of the first aspects, and the method comprises:

[0014] Get the air pressure value of the air pressure sensor;

[0015] determining whether the differential lock function is turned on according to the air pressure value;

[0016] If the differential lock function is turned on, a function-on signal is output;

[0017] If the differential lock function is turned off, a function-off signal is output.

[0018] In a possible implementation, determining whether the differential lock function is turned on according to the air pressure value includes:

[0019] If the air pressure value is greater than a preset value, it is determined that the differential lock function is turned on; otherwise, it is determined that the differential lock function is turned off.

[0020] In a possible implementation, the method further includes:

[0021] Obtaining an on / off signal of the solenoid valve;

[0022] Correspondingly, determining whether the differential lock function is turned on according to the air pressure value includes:

[0023] Whether the differential lock function is turned on is determined according to the on / off signal and the air pressure value.

[0024] In a possible implementation, determining whether the differential lock function is turned on according to the on / off signal and the air pressure value includes:

[0025] If the on-off signal indicates that the solenoid valve is on, determining whether the air pressure value is greater than a preset value;

[0026] If the air pressure value is greater than a preset value, it is determined that the differential lock function is turned on; otherwise, it is determined that the differential lock function is turned off.

[0027] In a third aspect, the present application provides a differential lock function detection device, the device comprising:

[0028] An acquisition module is used to obtain the on-off signal of the solenoid valve and the air pressure value of the air pressure sensor;

[0029] A determination module, used to determine whether the differential lock function is turned on according to the on-off signal and the air pressure value;

[0030] Output modules for:

[0031] If the differential lock function is turned on, a function-on signal is output;

[0032] If the differential lock function is turned off, a function-off signal is output.

[0033] In a fourth aspect, the present application provides a vehicle, comprising: a differential lock and a controller, wherein the controller is used to execute the method as described in any one of the second aspects.

[0034] In a fifth aspect, an embodiment of the present application provides an electronic device, including: a memory, a processor;

[0035] The memory stores computer-executable instructions;

[0036] The processor executes the computer-executable instructions stored in the memory, so that the processor executes the above second aspect and / or various possible implementations of the second aspect.

[0037] In a sixth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-readable storage medium is stored computer execution instructions, and when the computer execution instructions are executed by a processor, they are used to implement the first aspect above and / or various possible implementation methods of the first aspect.

[0038] In a seventh aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the above first aspect and / or various possible implementation methods of the first aspect.

[0039] The present application provides a differential lock function detection system, method, device, and vehicle, the system includes a solenoid valve, an air pressure sensor, an air pipe, a differential lock cylinder, and a controller; one end of the air pipe is connected to the air source, and the other end is connected to the air inlet of the differential lock cylinder through the solenoid valve; the solenoid valve is connected to the controller, and the solenoid valve transmits the on-off signal of all air circuits to the controller; the solenoid valve is provided with an air pressure sensor, the air pressure sensor is connected to the controller, and the air pressure sensor is used to detect the air pressure from the outlet of the solenoid valve air circuit to the air inlet of the differential lock cylinder, and transmit the detected air pressure value to the controller. Through the setting of the system, the differential lock start signal is adjusted from detecting the on-off of the bridge end pressure switch to detecting the on-off and air supply pressure value of the solenoid valve air circuit at the vehicle end, so that the pressure switch at the bridge end that detects the movement of the differential lock piston rod can be cancelled, and the water vapor generated after frequent wading due to the low position of the axle pressure switch is avoided, which eventually leads to the false alarm caused by the controller misjudging that the line is connected due to the reduction of the line resistance of the whole vehicle, thereby improving the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0041] Figure 1 Provide a schematic diagram of the technical route for realizing the functions of a traditional differential lock for this application;

[0042] Figure 2 A schematic diagram of a vehicle usage scenario provided for this application;

[0043] Figure 3 A schematic diagram of the structure of the differential lock function detection system provided in this application;

[0044] Figure 4 A schematic diagram of the flow chart of the differential lock function detection method provided in this application;

[0045] Figure 5 A schematic diagram of the flow chart of the differential lock function detection method provided in this application;

[0046] Figure 6 A schematic diagram of the technical route for realizing the differential lock function provided in this application;

[0047] Figure 7 A schematic diagram of the structure of a differential lock function detection device provided in this application;

[0048] Figure 8 A schematic diagram of the structure of the electronic device provided in this application.

[0049] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0050] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0051] Under normal driving conditions, the differential lock (also known as the differential) allows the left and right wheels to rotate at different speeds to adapt to turns and changes in road conditions. When one wheel loses grip (for example, on muddy or icy roads), the differential lock can be activated to lock the speed of the two wheels, ensuring that both tires can get the same driving force and prevent the tires from slipping.

[0052] The driver can manually activate or unlock the differential lock, or it can work automatically according to the wheel speed difference. Generally, the vehicle's display interface will show whether the differential lock function is activated for the user to view, and the user can manually choose to turn it on or off according to the displayed status.

[0053] The composition of the differential lock generally includes a differential lock body, a locking mechanism, a pneumatic or hydraulic drive power, and a pressure switch sensing mechanism.

[0054] Figure 1 A schematic diagram of the technical route for realizing the function of a traditional differential lock is provided for this application, such as Figure 1 As shown in the figure, the user turns on the differential lock function on the instrument switch, and the signal is transmitted to the solenoid valve, which opens the corresponding solenoid valve to supply air to the axle differential lock. The gas enters from the axle air inlet and pushes the piston rod to move. After the piston rod moves, it pushes the fork to engage the engagement sleeve and the differential; on the other hand, the piston rod squeezes the ejector pin of the pressure switch during the pushing process. After the ejector pin is pressed back, the pressure switch changes from disconnection to passage. Finally, the electrical wiring harness on the pressure switch feeds back the signal to the instrument controller, indicating that the differential function has been activated.

[0055] The differential lock of a vehicle is usually set on the axle. In daily use of the vehicle, especially on construction sites, when the vehicle passes through a wading pool, most of the axle will be soaked in muddy water. The differential lock related switches and other components will be soaked in muddy water for a long time and covered with mud. Figure 2 As shown, Figure 2A schematic diagram of a vehicle usage scenario provided for this application shows that the pressure switch port of the differential lock is soaked in mud and water for a long time, which easily generates some water vapor inside the switch port, causing the resistance of the inductive switch to decrease. The controller determines that the line is automatically connected and becomes a pathway, and finally transmits a signal to the instrument, sending a false alarm.

[0056] In view of the above problems, the present application proposes a differential lock function detection system, which determines whether the differential lock function is turned on by detecting the pressure after the solenoid valve through an air pressure sensor. The air pressure sensor is arranged on the vehicle frame or in the cabin to avoid water vapor interference, and can reduce the pressure switch components and corresponding wiring harnesses and connectors in the differential lock, thereby reducing the cost of the differential lock.

[0057] The technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems are described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0058] Figure 3 The schematic diagram of the differential lock function detection system provided in this application is as follows: Figure 3 As shown, the differential lock function detection system includes:

[0059] Solenoid valve, air pressure sensor, air pipe, differential lock cylinder and controller; among them, there is no pressure switch in the differential lock cylinder.

[0060] One end of the air pipe is connected to the air source, and the other end is connected to the air inlet of the differential lock cylinder through the solenoid valve;

[0061] The solenoid valve is connected to the controller, and the solenoid valve transmits the on-off signal of all gas circuits to the controller;

[0062] The solenoid valve is provided with an air pressure sensor, which is connected to the controller. The air pressure sensor is used to detect the air pressure from the outlet of the solenoid valve to the air inlet of the differential lock cylinder, and transmit the detected air pressure value to the controller. When the detected air pressure value is greater than the preset air pressure value, it means that the air path is open, the differential lock cylinder is ventilated, and the differential lock function is turned on.

[0063] This embodiment provides a differential lock function detection system, which can detect whether the differential lock function is turned on by checking the on / off state of the solenoid valve and detecting the air pressure with the pressure sensor, thereby preventing water vapor from causing a short circuit in the pressure switch and causing false triggering.

[0064] In order to further prevent the interference of water vapor, the air pressure sensor is set at a high position of the vehicle to avoid being immersed in water during wading. The air pressure sensor is set on the solenoid valve, which can be set on the frame or the engine compartment.

[0065] In some embodiments, the solenoid valve has an air inlet and multiple air outlets, and the multiple air outlets of the solenoid valve are respectively connected to the air inlet of the differential lock cylinder of the middle axle differential, the air inlet of the differential lock cylinder of the middle axle differential, and the air inlet of the differential lock cylinder of the rear axle differential. The user can control the opening or closing of at least one of the differential locks of the middle axle differential, the differential lock of the middle axle differential, and the differential lock of the rear axle differential, and control the corresponding solenoid valve switch to open, and the air pressure sensor detects the air pressure between the air outlet of the solenoid valve and the differential lock.

[0066] In some embodiments, only one air pressure sensor is disposed on the solenoid valve.

[0067] In some embodiments, an air pressure sensor is provided between the solenoid valve and the air path of the differential lock cylinder of the middle axle wheel differential, an air pressure sensor is provided between the solenoid valve and the air path of the differential lock cylinder of the middle axle shaft differential, and an air pressure sensor is provided between the solenoid valve and the air path of the differential lock cylinder of the rear axle wheel differential. Different air pressure sensors detect the pressure between different air paths.

[0068] Through the setting of this system, the differential lock signal sensing module is moved from the axle to a higher position, away from the water surface when the vehicle is wading, to avoid being immersed in muddy water for a long time. With a simple structure, when replacing the differential lock, it is no longer necessary to replace the sensing mechanism of the pressure switch and the corresponding connection harness. The replacement is convenient, and the low-cost implementation solution is convenient for batch switching implementation, while having the original differential lock execution sensing function.

[0069] The following introduces the differential lock function detection method by taking the controller in the differential lock function detection system as the execution subject.

[0070] Figure 4 A flow chart of a differential lock function detection method provided in this application, such as Figure 4 As shown, the following steps are included:

[0071] S101, obtaining the air pressure value of the air pressure sensor.

[0072] The current air pressure value is read through the air pressure sensor. If there are multiple air pressure sensors in the system, the air pressure value of each air pressure sensor is obtained.

[0073] S102: Determine whether the differential lock function is turned on according to the air pressure value.

[0074] If the air pressure value is greater than the preset value, it is determined that the differential lock function is turned on; otherwise, it is determined that the differential lock function is turned off.

[0075] S103: If the differential lock function is turned on, a function-on signal is output.

[0076] After determining that the differential lock function is turned on, a function-on signal is output to a display device (such as a vehicle display screen), and a differential lock function-on mark is displayed on the display device for the user to view.

[0077] S104: If the differential lock function is turned off, a function turn-off signal is output.

[0078] Similarly, after determining that the differential lock function is turned off, a function-off signal is output to a display device (such as a vehicle display screen), and a differential lock function-off mark is displayed on the display device for the user to view.

[0079] The present embodiment provides a differential lock function detection method, which determines whether the differential lock function is turned on based on the air pressure between the solenoid valve and the differential lock air inlet. The pressure switch triggered by the push rod in the differential lock is no longer required, and the signal generated by the pressure switch being falsely triggered by water vapor can be avoided, thereby improving the accuracy of the differential lock function detection.

[0080] Based on the above method embodiment, the air pressure value and the on / off signal of the solenoid valve are combined to improve the accuracy of detection. Figure 5 A flow chart of a differential lock function detection method provided in this application, such as Figure 5 As shown, the following steps are included:

[0081] S201, obtaining an on / off signal of the solenoid valve.

[0082] In one implementation, a solenoid valve may correspond to multiple differential locks and supply air to multiple differential locks. The user can click on a differential lock in the display device to open the passage corresponding to the solenoid valve. Obtain the on-off signals of all passages in the solenoid valve. On a solenoid valve, a pressure sensor can be set to detect the air pressure flowing out of the solenoid valve, or multiple sensors can be set, with different sensors detecting the air pressure of different air passages. The on-off state of each passage corresponding to a solenoid valve and the air pressure value can be used to determine whether the differential lock function corresponding to the passage is turned on.

[0083] In one implementation, one solenoid valve corresponds to one differential lock, and the on-off signals of all the solenoid valves are obtained.

[0084] S202: If the on-off signal indicates that the solenoid valve is on, determine whether the air pressure value is greater than a preset value.

[0085] In this step, if the on-off signal of the solenoid valve indicates that the solenoid valve is open, it means that air is supplied to the differential lock. First, the air pressure value of the air pressure sensor corresponding to the passage of the solenoid valve is obtained, and whether there is air in the air path is further determined according to the air pressure value. For example, in order to avoid the problem of normal air pressure and zero drift of air pressure value, a preset value is set in advance. If it is greater than the preset value, it means that the air pipe is ventilated and the differential lock function is turned on. If it is less than or equal to the preset value, it means that there is no ventilation in the air pipe.

[0086] S203: If the air pressure value is greater than a preset value, determine that the differential lock function is turned on.

[0087] In this step, the differential lock function can be determined to be on only when the on-off signal indicates that the solenoid valve is on and the air pressure value is greater than the preset value. When the on-off signal indicates that the solenoid valve is on, but the air pressure value is less than the preset value, and the two are inconsistent, a signal of system abnormality is output, which may be caused by air pressure leakage due to air circuit damage or insufficient air source pressure.

[0088] S204: If the on-off signal indicates that the solenoid valve is closed, or the air pressure value is less than a preset value, it is determined that the differential lock function is closed.

[0089] If the on-off signal indicates that the solenoid valve is closed, but the air pressure value is greater than the preset value, it means that the system is abnormal, but the solenoid valve may be damaged or the accuracy of the air pressure sensor is reduced.

[0090] If the on-off signal indicates that the solenoid valve is open, but the air pressure value is less than the preset value, it means that the system is abnormal, but the solenoid valve may be damaged or the air pressure sensor accuracy has failed.

[0091] The present embodiment provides a differential lock function detection method, which adjusts the differential lock start signal from detecting the on-off of the bridge-end pressure switch to detecting the on-off and air pressure value of the solenoid valve air circuit at the vehicle end, cancels the switch at the bridge end for detecting the movement of the differential lock piston rod, and adds a feedback loop and an air pressure sensor at the solenoid valve end of the vehicle, collects the on-off value of the solenoid valve air circuit and the differential lock air supply pressure value to detect the start and stop of related functions, and provides double insurance to avoid false alarms.

[0092] Figure 6 A schematic diagram of the technical route for realizing the differential lock function provided for this application, such as Figure 6 As shown, the following steps are included:

[0093] first step

[0094] The structure of the differential lock has been changed, and the differential lock switch on the axle, which originally relied on air intake and piston push to sense the execution signal, and the wiring harness and plug-in connecting the vehicle instrument to the axle switch have been eliminated. A total of three sets of sensing mechanisms and corresponding connecting harnesses, including the differential lock between the middle axle shafts, the differential lock between the middle axle wheels, and the differential lock between the rear axle wheels, can be eliminated on one vehicle.

[0095] Step 2

[0096] By using the electrical wiring harness that originally transmits the rocker switch signal on the air supply solenoid valve, a signal feedback loop is added to determine the on / off status of the solenoid valve air supply. At the same time, an air pressure sensor switch is added to the solenoid valve to detect the air pressure value of the three-way differential lock of the axle. Finally, by simultaneously collecting the on / off signal and air pressure value signal of the solenoid valve air circuit, the air supply status of the solenoid valve to the axle differential lock is determined, and finally the signal is fed back to the instrument, and the differential lock function light of the instrument lights up.

[0097] Step 3

[0098] After adjustment, the final path of the entire solution is: the instrument rocker switch inputs a signal to the solenoid valve fixed on the frame through the wiring harness. After receiving the signal, the solenoid valve starts to control the on-off of the air circuit and finally supplies air to the axle differential lock through the air pipe; at this time, two functional paths are triggered, one is the functional signal feedback path, which feeds back the on-off signal of the solenoid valve through the wiring harness loop connected to the instrument on the solenoid valve, and at the same time, the air pressure sensor on the solenoid valve detects the air pressure value supplied to the three air circuits of the middle bridge wheel difference, the middle bridge shaft difference, and the rear axle wheel difference and feeds back the air pressure signal. The instrument judges that the differential lock has been normally supplied with air according to the on-off signal of the solenoid valve and the air supply pressure value signal, and then the function signal light will light up on the instrument to remind the user that the differential lock function has been enabled and needs attention; the second is the function execution path, which inputs the air source to the differential lock through the air port, and the air pressure pushes the piston, the piston rod and the fork to move together, and the return spring is compressed, and finally pushes the engagement sleeve and the differential to engage. After the differential function fails, the left and right half shafts are synchronously locked, and the differential lock function is realized.

[0099] When the differential lock function is contacted, the instrument rocker switch inputs a closing signal, the solenoid valve becomes disconnected and stops supplying air; the instrument determines that the differential lock has stopped executing based on the on-off signal and the air supply pressure value signal fed back by the solenoid valve, and the differential lock function light on the instrument goes out; after the differential lock of the other path axle loses the air pressure input by the solenoid valve, the piston, piston rod and shift fork return to their original positions under the action of the return spring, the shift fork pushes the engagement sleeve and differential to disengage, the differential function is restored, the left and right half shafts can be differential normally, and the differential lock function ends.

[0100] Through the method provided in this embodiment, the position of the traditional vehicle differential lock function detection is moved from the three scattered sensing devices at the axle end to the whole vehicle end for unified detection and control; away from the axle end where wading is frequent, to avoid false alarms and save product costs.

[0101] Figure 7 A schematic diagram of the structure of a differential lock function detection device provided in this application, such as Figure 7 As shown, the differential lock function detection device 700 provided in this embodiment includes:

[0102] An acquisition module 701 is used to acquire the air pressure value of the air pressure sensor;

[0103] A determination module 702, configured to determine whether a differential lock function is turned on according to the air pressure value;

[0104] The output module 703 is used to:

[0105] If the differential lock function is turned on, a function-on signal is output;

[0106] If the differential lock function is turned off, a function-off signal is output.

[0107] In some embodiments, the determining module 702 is specifically configured to:

[0108] If the air pressure value is greater than a preset value, it is determined that the differential lock function is turned on; otherwise, it is determined that the differential lock function is turned off.

[0109] In some embodiments, the acquisition module 701 is further used to acquire an on / off signal of the solenoid valve;

[0110] Accordingly, the determining module 702 is further used for:

[0111] Whether the differential lock function is turned on is determined according to the on / off signal and the air pressure value.

[0112] In some embodiments, the determining module 702 is further configured to:

[0113] If the on-off signal indicates that the solenoid valve is on, determining whether the air pressure value is greater than a preset value;

[0114] If the air pressure value is greater than a preset value, it is determined that the differential lock function is turned on; otherwise, it is determined that the differential lock function is turned off.

[0115] In some embodiments, the device further includes a display module 704, and the display module is used to display whether the function is enabled.

[0116] The differential lock function detection device provided in this embodiment can execute the method provided in the above method embodiment, and its implementation principle and technical effect are similar, which will not be described in detail in this embodiment.

[0117] Figure 8 This is a schematic diagram of the structure of an electronic device provided in this application. The electronic device may be a controller, such as Figure 8 As shown, the electronic device 50 provided in this embodiment includes: at least one processor 501 and a memory 502. Optionally, the device 50 also includes a communication component 503. The processor 501, the memory 502 and the communication component 503 are connected via a bus 504.

[0118] In a specific implementation process, at least one processor 501 executes the computer-executable instructions stored in the memory 502, so that at least one processor 501 executes the above method.

[0119] The specific implementation process of the processor 501 can be found in the above method embodiment, and its implementation principle and technical effect are similar, so this embodiment will not be repeated here.

[0120] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the invention may be directly implemented as being executed by a hardware processor, or may be executed by a combination of hardware and software modules in the processor.

[0121] The memory may include a high-speed memory (Random Access Memory, RAM), and may also include a non-volatile memory (Non-volatile Memory, NVM), such as at least one disk storage.

[0122] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0123] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.

[0124] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.

[0125] The present application also provides a vehicle, which includes the above-mentioned differential lock function detection system, and the controller of the differential lock function detection system can execute the above-mentioned method.

[0126] The above-mentioned readable storage medium can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general or special-purpose computer.

[0127] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be a component of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (Application Specific Integrated Circuits, referred to as: ASIC). Of course, the processor and the readable storage medium can also exist in the device as discrete components.

[0128] The division of units is only a logical function division, and there may be other divisions in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interface, device or unit, which can be electrical, mechanical or other forms.

[0129] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0130] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0131] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0132] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0133] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A differential lock function detection system, characterized in that: include: Solenoid valve, air pressure sensor, air pipe, differential lock cylinder and controller; One end of the air pipe is connected to the air source, and the other end is connected to the air inlet of the differential lock cylinder through the solenoid valve; The solenoid valve is connected to the controller, and the solenoid valve transmits the on / off signals of all gas paths to the controller; The air pressure sensor is provided on the solenoid valve and connected to the controller. The air pressure sensor is used to detect the air pressure from the air outlet of the solenoid valve to the air inlet of the differential lock cylinder, and transmit the detected air pressure value signal to the controller.

2. The system according to claim 1, characterized in that The solenoid valve is arranged on a vehicle frame or in an engine compartment.

3. The system according to claim 1 or 2, characterized in that: The solenoid valve is respectively connected to the air inlet of the differential lock cylinder of the middle axle wheel differential, the air inlet of the differential lock cylinder of the middle axle shaft differential, and the air inlet of the differential lock cylinder of the rear axle wheel differential.

4. The system according to claim 3, characterized in that An air pressure sensor is provided between the solenoid valve and the air path of the differential lock cylinder of the middle axle wheel differential, an air pressure sensor is provided between the air path of the differential lock cylinder of the middle axle shaft differential, and an air pressure sensor is provided between the air path of the differential lock cylinder of the rear axle wheel differential.

5. A differential lock function detection method, characterized in that: A controller used in a differential lock function detection system according to any one of claims 1 to 4, the method comprising: Get the air pressure value of the air pressure sensor; determining whether the differential lock function is turned on according to the air pressure value; If the differential lock function is turned on, a function-on signal is output; If the differential lock function is turned off, a function-off signal is output.

6. The method according to claim 5, characterized in that The step of determining whether the differential lock function is turned on according to the air pressure value includes: If the air pressure value is greater than a preset value, it is determined that the differential lock function is turned on; otherwise, it is determined that the differential lock function is turned off.

7. The method according to claim 5, characterized in that The method further comprises: Get the on / off signal of the solenoid valve; Correspondingly, determining whether the differential lock function is turned on according to the air pressure value includes: Whether the differential lock function is turned on is determined according to the on / off signal and the air pressure value.

8. The method according to claim 7, characterized in that The step of determining whether the differential lock function is turned on according to the on / off signal and the air pressure value includes: If the on-off signal indicates that the solenoid valve is on, determining whether the air pressure value is greater than a preset value; If the air pressure value is greater than a preset value, it is determined that the differential lock function is turned on; otherwise, it is determined that the differential lock function is turned off.

9. A differential lock function detection device, characterized in that: The device comprises: An acquisition module is used to obtain the on-off signal of the solenoid valve and the air pressure value of the air pressure sensor; A determination module, used to determine whether the differential lock function is turned on according to the on-off signal and the air pressure value; Output modules for: If the differential lock function is turned on, a function-on signal is output; If the differential lock function is turned off, a function-off signal is output.

10. A vehicle, characterized in that: include: A differential lock and a controller, wherein the controller is used to execute the method according to any one of claims 5 to 8.

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