Method, device and controller for transfer case take-off protection

Abstract

The application discloses a method, device and controller for power take-off protection of a transfer case. The method comprises: receiving vehicle auxiliary air pressure sent by an air pressure sensor during power take-off of the transfer case, and determining whether the vehicle auxiliary air pressure is lower than a preset value; in the case where the vehicle auxiliary air pressure is lower than the preset value, controlling the chassis to exit a steering mode, controlling a vehicle hydraulic lock to act to lock and controlling an engine to restore an idle state; controlling a steering circuit auxiliary power take-off air valve to be powered on to supply air to the transfer case; determining whether a power take-off stroke switch and a neutral stroke switch of the transfer case are closed; and in the case where the power take-off stroke switch and the neutral stroke switch are closed, releasing the vehicle hydraulic lock and releasing the idle state of the engine. When air leakage occurs during power take-off, the auxiliary circuit power take-off air valve is used to supply air to the transfer case to continue power take-off, so that the stability of power take-off of the transfer case is improved, and the safety of operation is improved.

Description

Technical Field

[0001] This application relates to the field of transfer case power take-off technology, and specifically to a method, device and controller for transfer case power take-off protection. Background Technology

[0002] Currently, some single-engine crane models with a lifting capacity of 90 tons or more use a transfer case for power take-off (PTO). Due to the harsh operating environment of cranes, valves are prone to damage and leakage during operation. Maintaining continuous power input to the upper vehicle even after valve failure is essential. The current control logic for the transfer case PTO involves supplying air to the PTO and neutral gears, keeping the transfer case chassis in neutral, and then transmitting power to the upper vehicle for operation. In this PTO process, if any valve related to PTO malfunctions and leaks, it leads to abnormal air pressure in the auxiliary air circuit, causing the transfer case to disengage from PTO. This can result in minor issues like vehicle shutdown, or more serious problems like damage to internal gears and other vehicle components. However, current technology lacks a protection mechanism for leaks caused by valve malfunctions during PTO, leading to instability and potential machine damage during leaks. Summary of the Invention

[0003] The purpose of this application is to provide a method, device, and controller for transfer case power take-off protection, in order to solve the problem in the prior art that the transfer case power take-off is unstable and easily causes machine damage when there is air leakage.

[0004] To achieve the above objectives, the first aspect of this application provides a method for transfer case power take-off protection, applied to a controller, the controller communicating with a pressure sensor, chassis, upper vehicle hydraulic lock, engine, and steering circuit auxiliary power take-off valve, the method comprising:

[0005] During the power take-off process of the transfer case, the vehicle auxiliary air circuit pressure is received from the air pressure sensor;

[0006] Determine if the air pressure in the vehicle's auxiliary air circuit is lower than the preset value;

[0007] When the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, the chassis is controlled to exit the steering mode, the upper hydraulic lock is controlled to lock, and the engine is controlled to return to idle speed.

[0008] After the chassis exits steering mode, the upper hydraulic lock completes its locking action, and the engine returns to idle speed, the auxiliary power take-off valve of the steering circuit is energized to supply air to the transfer case.

[0009] Determine whether the power take-off limit switch and the neutral limit switch of the transfer case are closed;

[0010] With the power take-off limit switch and neutral limit switch closed, the upper hydraulic lock is released and the engine idle speed is released.

[0011] In this embodiment, if the power take-off limit switch and / or neutral limit switch are not closed, the auxiliary power take-off valve of the steering circuit is energized until the power take-off limit switch and neutral limit switch are closed.

[0012] In this embodiment, the controller also communicates with the display screen, and the method further includes:

[0013] If the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, a fault warning message will be sent to the display screen.

[0014] In this embodiment, when the power take-off limit switch and the neutral limit switch are closed, a stop fault warning message is sent to the display screen.

[0015] In this embodiment of the application, the controller also communicates with the vehicle throttle, and the method further includes:

[0016] When the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, the throttle control will not respond.

[0017] A second aspect of this application provides a controller, characterized in that it comprises:

[0018] The memory is configured to store instructions; and

[0019] The processor is configured to retrieve instructions from memory and, when executing the instructions, to implement the aforementioned transfer case power take-off protection method.

[0020] A third aspect of this application provides a device for protecting the power take-off of a transfer case, comprising:

[0021] Based on the controller described above;

[0022] The air pressure sensor communicates with the controller and is configured to monitor the air pressure in the vehicle's auxiliary air circuits and send the data to the controller.

[0023] The chassis communicates with the controller and is configured to receive commands from the controller and exit slewing mode.

[0024] The upper hydraulic lock communicates with the controller and is configured to receive commands from the controller and perform the locking action.

[0025] The engine, which communicates with the controller, is configured to receive commands from the controller and resume idling.

[0026] The steering circuit auxiliary power take-off valve communicates with the controller and is configured to receive commands from the controller and be energized to supply air to the transfer case.

[0027] In this embodiment, the device also includes a display screen that communicates with the controller and is configured to display a fault warning when the vehicle's auxiliary air circuit pressure is lower than a preset value, and to display a warning cancellation prompt when the power take-off limit switch and the neutral limit switch are closed.

[0028] In this embodiment of the application, the device also includes an upper vehicle throttle, which communicates with the controller and is configured to receive a command from the controller to disable the upper vehicle throttle when the air pressure in the vehicle's auxiliary air circuit is lower than a preset value.

[0029] A fourth aspect of this application provides a machine-readable storage medium storing instructions for causing a machine to perform the transfer case power take-off protection method described above.

[0030] Through the above technical solution, during the transfer case power take-off process, the system receives the vehicle auxiliary air circuit pressure sent by the air pressure sensor; it determines whether the vehicle auxiliary air circuit pressure is lower than a preset value. If it is lower than the preset value, the system controls the chassis to exit steering mode, controls the upper hydraulic lock to engage and lock, and controls the engine to return to idle speed. Then, it controls the steering circuit auxiliary power take-off valve to be energized to supply air to the transfer case; it also determines whether the transfer case's power take-off limit switch and neutral limit switch are closed; if the power take-off limit switch and neutral limit switch are closed, the upper hydraulic lock is released and the engine idle speed is released. This application improves the stability of the transfer case power take-off and enhances operational safety by using the auxiliary circuit power take-off valve to supply air to the transfer case to continue power take-off when air leakage occurs during the power take-off process.

[0031] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. In the drawings:

[0033] Figure 1 A flowchart illustrating a method for protecting a transfer case according to an embodiment of this application is shown schematically.

[0034] Figure 2 A flowchart illustrating a method for protecting a transfer case according to a specific embodiment of this application is shown schematically.

[0035] Figure 3 This schematic diagram illustrates a structural block diagram of a controller according to an embodiment of the present application;

[0036] Figure 4The diagram schematically illustrates a structural diagram of a transfer case power take-off protection device according to an embodiment of this application.

[0037] Explanation of reference numerals in the attached figures

[0038] 401 Controller; 402 Chassis

[0039] 403 Hydraulic lock for vehicle mounting; 404 Engine

[0040] 405 Steering circuit auxiliary power take-off valve; 406 Display screen

[0041] 407 Get in the car and press the accelerator. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the embodiments of this application and are not intended to limit the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0043] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0044] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0045] Figure 1 A flowchart illustrating a method for transfer case power take-off protection according to an embodiment of this application is shown schematically. Figure 1 As shown in the figure, this application embodiment provides a method for power take-off protection of a transfer case, which may include the following steps.

[0046] Step 101: During the power take-off process of the transfer case, receive the vehicle auxiliary air circuit pressure sent by the air pressure sensor.

[0047] In this embodiment, the transfer case is a device that distributes engine power. The transfer case can output power to the rear axle or simultaneously to both the front and rear axles, rationally distributing the engine's power. A pressure sensor is an instrument used to measure the absolute pressure of a gas, primarily applicable to physical experiments related to gas pressure, such as gas laws. In existing transfer case power take-off (PTO) processes, if a valve related to PTO malfunctions and leaks, it will lead to abnormal air pressure in the auxiliary air circuit, causing the transfer case to disengage from PTO. This can result in minor issues like vehicle malfunction or, in severe cases, damage to internal gears and other vehicle components. In this solution, before the transfer case engages PTO, the vehicle must be parked, the engine ignited at idle, the transmission in neutral, and the handbrake engaged. After pressing the PTO switch, PTO is successfully initiated, and the vehicle can then proceed with the PTO operation. During PTO, a pressure sensor continuously monitors the air pressure in the vehicle's auxiliary air circuit to detect any abnormalities. The controller receives real-time air pressure data from the vehicle's auxiliary air circuit sent by the air pressure sensor. By monitoring the air pressure of the vehicle's auxiliary air circuit in real time, it can determine whether there is air leakage during the transfer case power take-off process, thereby improving the stability of the transfer case power take-off.

[0048] Step 102: Determine whether the air pressure in the vehicle's auxiliary air circuit is lower than the preset value.

[0049] In this embodiment, after receiving the vehicle auxiliary air circuit pressure from the air pressure sensor, the controller determines whether the vehicle auxiliary air circuit pressure is lower than a preset value. The preset value refers to a pre-defined critical pressure value. If the vehicle auxiliary air circuit pressure is higher than the preset value, it indicates that there is no abnormality in the power take-off and it can proceed normally. If the vehicle auxiliary air circuit pressure is lower than the preset value, it indicates that there is an air leak in the auxiliary air circuit, and corresponding protective measures need to be taken. By determining whether the vehicle auxiliary air circuit pressure is lower than the preset value, it is possible to determine whether there is an air leak, thereby improving the stability of the transfer case's power take-off.

[0050] Step 103: When the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, control the chassis to exit the steering mode, control the upper hydraulic lock to lock, and control the engine to return to idle speed.

[0051] In this embodiment, before the transfer case takes power, the vehicle must be parked, the engine ignited and set to idle, the transmission in neutral, and the handbrake engaged. If the auxiliary air pressure in the vehicle's air circuit is lower than a preset value, it indicates an air leak. To ensure the stability and safety of the transfer case's power take-off, the controller can disengage the chassis from steering mode, activate the upper hydraulic lock, and restore the engine to idle. This rapid handling of transfer case power take-off leakage improves the safety of the process and ensures the continuity of construction, preventing substantial economic losses caused by work stoppages due to a lack of replacement valves on site.

[0052] Step 104: After the chassis exits the steering mode, the upper hydraulic lock completes the locking action, and the engine returns to idle speed, the auxiliary power take-off valve of the steering circuit is energized to supply air to the transfer case.

[0053] In this embodiment, the steering circuit auxiliary power take-off valve refers to a valve on the steering circuit that can control power take-off. In the event of an air leak, the controller controls the chassis to exit steering mode, activates the upper hydraulic lock, and restores the engine to idle. After these control actions are completed, the controller can energize the steering circuit auxiliary power take-off valve to supply air to the transfer case, allowing the transfer case to continue taking power. Using the steering circuit auxiliary power take-off valve for control in case of an air leak provides effective power take-off control and leak protection without affecting steering function.

[0054] Step 105: Determine whether the power take-off limit switch and the neutral limit switch of the transfer case are closed.

[0055] In this embodiment, both the power take-off (PTO) limit switch and the neutral limit switch are switches mounted on the transfer case. The PTO limit switch determines whether power take-off is in progress. The neutral limit switch determines whether the transmission is in neutral. When both the PTO and neutral limit switches are closed, it indicates that the steering circuit auxiliary PTO valve is working normally, the transfer case power take-off is normal, and leakage protection is implemented. When neither the PTO nor neutral limit switches are closed, it indicates that leakage protection is not fully implemented, and leakage still exists. In this case, the steering circuit auxiliary PTO valve can continue to be energized until both the PTO and neutral limit switches are closed. By determining whether the PTO and neutral limit switches are closed, it is possible to further determine whether leakage still exists when taking power through the auxiliary road, thus improving the stability of the transfer case power take-off.

[0056] Step 106: With the power take-off limit switch and neutral limit switch closed, release the upper hydraulic lock and release the engine from idle.

[0057] In this embodiment, when an auxiliary air circuit leaks abnormally, the controller controls the chassis to exit steering mode, controls the upper hydraulic lock to engage, and controls the engine to return to idle. With both the power take-off (PTO) limit switch and the neutral limit switch closed, it indicates that the leak protection has been fully implemented, and the transfer case can continue to take power. At this time, the controller can release the upper hydraulic lock and deactivate the engine, allowing the transfer case to continue taking power. By adjusting the states of the upper hydraulic lock and the engine based on the closed states of the transfer case's PTO and neutral limit switches, the stability of the transfer case's power take-off can be improved.

[0058] Through the above technical solution, during the transfer case power take-off process, the system receives the vehicle auxiliary air circuit pressure sent by the air pressure sensor; it determines whether the vehicle auxiliary air circuit pressure is lower than a preset value. If it is lower than the preset value, the system controls the chassis to exit steering mode, controls the upper hydraulic lock to engage and lock, and controls the engine to return to idle speed. Then, it controls the steering circuit auxiliary power take-off valve to be energized to supply air to the transfer case; it also determines whether the transfer case's power take-off limit switch and neutral limit switch are closed; if the power take-off limit switch and neutral limit switch are closed, the upper hydraulic lock is released and the engine idle speed is released. This application improves the stability of the transfer case power take-off and enhances operational safety by using the auxiliary circuit power take-off valve to supply air to the transfer case to continue power take-off when air leakage occurs during the power take-off process.

[0059] In this embodiment of the application, the method may further include:

[0060] If the power take-off limit switch and / or neutral limit switch are not closed, continue to energize the auxiliary power take-off valve of the steering circuit until the power take-off limit switch and neutral limit switch are closed.

[0061] Specifically, when the transfer case is not supplied with air, the transfer case's power take-off (PTO) limit switch and neutral limit switch are in the open state. During the air supply process, the airflow pushes the PTO and neutral limit switches from the open state to the closed state. If an air leak is detected, the controller energizes the steering circuit auxiliary PTO valve, supplying power to the transfer case. When the transfer case is fully energized, the PTO and neutral limit switches are closed. If the PTO and / or neutral limit switches are not closed, it indicates that the air leak protection is not fully implemented and an air leak still exists. In this case, the steering circuit auxiliary PTO valve is energized again to continue supplying air to the transfer case until the PTO and neutral limit switches are closed, i.e., until the air leak protection is fully implemented. By continuing to supply air to the transfer case even when the PTO and / or neutral limit switches are not closed, the air leak protection is fully implemented, improving the stability of the transfer case's power take-off.

[0062] In this embodiment of the application, the controller also communicates with the display screen, and the method may further include:

[0063] If the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, a fault warning message will be sent to the display screen.

[0064] Specifically, the display screen can be the upper vehicle force limiter display screen, installed on the entire vehicle, used to display fault warning information to remind the operator that there is an air circuit fault during the transfer case power take-off process. When the controller determines that the auxiliary air circuit pressure of the vehicle is lower than the preset value, the controller sends a fault warning message to the display screen. The display screen receives the instruction sent by the controller and displays the fault warning information to remind the operator that there is an air circuit fault, so that the operator can notice the fault and take appropriate protective measures.

[0065] In this embodiment of the application, the method may further include:

[0066] When the power take-off limit switch and the neutral limit switch are closed, a stop fault warning message is sent to the display screen.

[0067] Specifically, when the auxiliary air circuit pressure is determined to be lower than a preset value, the controller sends a fault warning message to the display screen. The display screen receives the command from the controller and displays the fault warning message. At this time, the controller energizes the steering circuit auxiliary power take-off valve to supply air to the transfer case. During the air supply process to the transfer case, the transfer case's power take-off limit switch and neutral limit switch will switch from the open state to the closed state. When both the power take-off limit switch and neutral limit switch of the transfer case are closed, it indicates that the steering circuit auxiliary power take-off valve is working normally, the transfer case power take-off is normal, and the air leakage protection has been implemented. The controller sends a stop fault warning message to the display screen. After receiving the command from the controller, the display screen exits the fault warning message display. By displaying fault warning messages and stop fault warning messages in real time, the operator can promptly grasp whether there are any abnormalities in the transfer case power take-off process, and take timely action when abnormalities are found, thereby improving the stability and safety of the transfer case power take-off.

[0068] In this embodiment of the application, the controller also communicates with the vehicle throttle, and the method may further include:

[0069] When the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, the throttle control will not respond.

[0070] Specifically, if the auxiliary air circuit pressure is determined to be lower than the preset value, it indicates an abnormal air leak in the auxiliary air circuit, requiring appropriate protective measures. The controller can control the chassis to exit steering mode, control the upper hydraulic lock to engage and lock, and control the engine to return to idle speed. Simultaneously, the controller can prevent the upper throttle from responding, avoiding safety issues caused by throttle response after an air leak occurs.

[0071] Through the above technical solution, during the transfer case power take-off process, the system receives the vehicle auxiliary air circuit pressure sent by the air pressure sensor; it determines whether the vehicle auxiliary air circuit pressure is lower than a preset value. If it is lower than the preset value, the system controls the chassis to exit steering mode, controls the upper hydraulic lock to engage and lock, and controls the engine to return to idle speed. Then, it controls the steering circuit auxiliary power take-off valve to be energized to supply air to the transfer case; it also determines whether the transfer case's power take-off limit switch and neutral limit switch are closed; if the power take-off limit switch and neutral limit switch are closed, the upper hydraulic lock is released and the engine idle speed is released. This application improves the stability of the transfer case power take-off and enhances operational safety by using the auxiliary circuit power take-off valve to supply air to the transfer case to continue power take-off when air leakage occurs during the power take-off process.

[0072] Figure 2 A flowchart illustrating a method for transfer case power take-off protection according to a specific embodiment of this application is shown schematically. Figure 2As shown in the figure, a specific embodiment of this application provides a method for protecting the power take-off of a transfer case, which may include the following steps.

[0073] S201. With the vehicle in neutral, engage the handbrake.

[0074] S202, Power Take-Off of Vehicle Transfer Case;

[0075] S203, Body controller monitors the air pressure of the vehicle's auxiliary air circuits;

[0076] S204. Determine if the auxiliary air pressure is normal. If not, proceed to S205; if yes, proceed to S213.

[0077] S205, Body controller controls exit from steering mode;

[0078] S206, The driver is reminded of a gas circuit malfunction on the vehicle's control panel;

[0079] S207, Automatic control of the upper vehicle locking hydraulic system;

[0080] S208, Control engine speed to maintain idle speed;

[0081] S209, The auxiliary power take-off valve of the steering circuit is energized;

[0082] S210. Determine whether the transfer case power take-off limit switch and the neutral limit switch are closed. If yes, proceed to S211; otherwise, return to S207.

[0083] S211. Release the upper vehicle hydraulic lock and release the upper vehicle speed idle control;

[0084] S212. Remind the customer that the power input has returned to normal.

[0085] S213, Power take-off is operating normally.

[0086] Specifically, before taking power from the transfer case, park the vehicle, start the engine and keep it idling, put the transmission in neutral, and engage the handbrake. Press the power take-off switch; once power take-off is successful, proceed with the vehicle operation. During power take-off, the vehicle controller monitors the auxiliary air circuit pressure in real time via a pressure sensor. When the auxiliary air circuit pressure is above a critical value M, power take-off is normal and proceeds without abnormality. When the auxiliary air circuit pressure is below the critical value M, it is determined to be an auxiliary air circuit leak. At this time, the vehicle controller controls the chassis to exit steering mode, automatically controls the vehicle locking hydraulic system, and maintains the engine speed at idle; the vehicle operation screen alerts the driver to the air circuit malfunction. The controller's actions of controlling the chassis to exit steering mode, automatically controlling the vehicle locking hydraulic system, and maintaining the engine speed at idle can occur simultaneously. After these conditions are met, the vehicle controller energizes the auxiliary power take-off valve in the steering circuit to supply air to the transfer case. Determine if the transfer case's PTO limit switch and neutral limit switch are closed. If closed, it indicates the auxiliary PTO valve is working normally, the transfer case's PTO is normal, and leakage protection is in place. If not closed, leakage protection is not fully implemented. Continue energizing the steering circuit's auxiliary PTO valve until the transfer case's PTO and neutral limit switches are closed. Once the transfer case's PTO and neutral limit switches are detected to be closed, the controller releases the vehicle's hydraulic lock, disengages engine idle speed control, the vehicle's display warning disappears, prompting the customer to continue operation, and PTO returns to normal.

[0087] Figure 3 A schematic block diagram of a controller according to an embodiment of this application is shown. Figure 3 As shown in the figure, this application provides a controller that may include:

[0088] Memory 310 is configured to store instructions; and

[0089] The processor 320 is configured to retrieve instructions from the memory 310 and, when executing the instructions, to implement the aforementioned transfer case power take-off protection method.

[0090] Specifically, in this embodiment of the application, the processor 320 can be configured to:

[0091] During the power take-off process of the transfer case, the vehicle auxiliary air circuit pressure is received from the air pressure sensor;

[0092] Determine if the air pressure in the vehicle's auxiliary air circuit is lower than the preset value;

[0093] When the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, the chassis is controlled to exit the steering mode, the upper hydraulic lock is controlled to lock, and the engine is controlled to return to idle speed.

[0094] After the chassis exits steering mode, the upper hydraulic lock completes its locking action, and the engine returns to idle speed, the auxiliary power take-off valve of the steering circuit is energized to supply air to the transfer case.

[0095] Determine whether the power take-off limit switch and the neutral limit switch of the transfer case are closed;

[0096] With the power take-off limit switch and neutral limit switch closed, the upper hydraulic lock is released and the engine idle speed is released.

[0097] Furthermore, the processor 320 can also be configured as follows:

[0098] If the power take-off limit switch and / or neutral limit switch are not closed, continue to energize the auxiliary power take-off valve of the steering circuit until the power take-off limit switch and neutral limit switch are closed.

[0099] Furthermore, the processor 320 can also be configured as follows:

[0100] The controller also communicates with the display screen, and the method further includes:

[0101] If the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, a fault warning message will be sent to the display screen.

[0102] Furthermore, the processor 320 can also be configured as follows:

[0103] When the power take-off limit switch and the neutral limit switch are closed, a stop fault warning message is sent to the display screen.

[0104] Furthermore, the processor 320 can also be configured as follows:

[0105] The controller also communicates with the vehicle's throttle, and the method further includes:

[0106] When the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, the throttle control will not respond.

[0107] Through the above technical solution, during the transfer case power take-off process, the system receives the vehicle auxiliary air circuit pressure sent by the air pressure sensor; it determines whether the vehicle auxiliary air circuit pressure is lower than a preset value. If it is lower than the preset value, the system controls the chassis to exit steering mode, controls the upper hydraulic lock to engage and lock, and controls the engine to return to idle speed. Then, it controls the steering circuit auxiliary power take-off valve to be energized to supply air to the transfer case; it also determines whether the transfer case's power take-off limit switch and neutral limit switch are closed; if the power take-off limit switch and neutral limit switch are closed, the upper hydraulic lock is released and the engine idle speed is released. This application improves the stability of the transfer case power take-off and enhances operational safety by using the auxiliary circuit power take-off valve to supply air to the transfer case to continue power take-off when air leakage occurs during the power take-off process.

[0108] Figure 4 This schematically illustrates a structural diagram of a transfer case power take-off protection device according to an embodiment of this application. Figure 4 As shown in the figure, this application embodiment also provides a device for transfer case power take-off protection, which may include:

[0109] According to the controller 401 described above;

[0110] The air pressure sensor 402 communicates with the controller 401 and is configured to monitor the air pressure of the vehicle's auxiliary air circuit and send it to the controller 401.

[0111] The chassis 403 communicates with the controller 401 and is configured to receive commands from the controller 401 and exit the slewing mode.

[0112] The upper hydraulic lock 404 communicates with the controller 401 and is configured to receive instructions from the controller 401 and complete the locking action;

[0113] Engine 405, communicating with controller 401, is configured to receive commands from controller 401 and resume idle speed.

[0114] The steering circuit auxiliary power take-off valve 406 communicates with the controller 401 and is configured to receive commands from the controller 401 and be energized to supply air to the transfer case.

[0115] Specifically, the air pressure sensor 402 is located near the auxiliary air circuit to monitor the air pressure of the vehicle's auxiliary air circuit and send the air pressure value to the controller 401. The chassis 403, the upper hydraulic lock 404, the engine 405, and the steering circuit auxiliary power take-off valve 406 communicate with the controller 401. During the transfer case power take-off process, the controller 401 receives the vehicle's auxiliary air circuit air pressure sent by the air pressure sensor 402. The controller 401 determines whether the vehicle's auxiliary air circuit air pressure is lower than a preset value. If it is lower than the preset value, the controller 401 controls the chassis 403 to exit the steering mode, controls the upper hydraulic lock 404 to lock, and controls the engine 405 to return to idle speed. Then, it controls the steering circuit auxiliary power take-off valve 406 to be energized to supply air to the transfer case. It also determines whether the transfer case's power take-off limit switch and neutral limit switch are closed. If the power take-off limit switch and neutral limit switch are closed, the controller 401 releases the upper hydraulic lock 404 and deactivates the engine 405 from idle speed.

[0116] like Figure 4 As shown in the embodiments of this application, the device may further include:

[0117] The display screen 406 communicates with the controller 401 and is configured to display a fault warning when the air pressure in the vehicle's auxiliary air circuit is lower than a preset value, and to display a warning cancellation prompt when the power take-off limit switch and the neutral limit switch are closed.

[0118] Specifically, the display screen 406 is installed on the vehicle and is used to display fault warning information and warning cancellation prompts. When the auxiliary air circuit pressure of the vehicle is lower than the preset value, the controller 401 sends a command to the display screen 406, and the display screen 406 displays a fault warning after receiving the command from the controller 401. When the power take-off limit switch and the neutral limit switch are closed, the controller 401 sends a command to the display screen 406, and the display screen 406 displays a warning cancellation prompt after receiving the command from the controller 401. By displaying fault warning information and stop fault warning information in real time on the display screen 406, the operator can promptly grasp whether there are any abnormalities in the power take-off process of the transfer case, and take timely action when abnormalities are found, thereby improving the stability and safety of the power take-off process of the transfer case.

[0119] like Figure 4 As shown in the embodiments of this application, the device may further include:

[0120] The upper throttle 407 communicates with the controller 401 and is configured to receive a command from the controller 401 to disable the upper throttle when the air pressure in the vehicle's auxiliary air circuit is lower than a preset value.

[0121] Specifically, if the auxiliary air circuit pressure is determined to be lower than the preset value, it indicates an abnormal air leak in the auxiliary air circuit, and corresponding protective measures need to be taken. The controller 401 can control the chassis 402 to exit steering mode, control the upper hydraulic lock 403 to lock, and control the engine 404 to return to idle speed. Simultaneously, the controller can prevent the upper throttle 407 from responding, thus preventing safety issues from occurring due to the upper throttle 407 responding after an air leak.

[0122] Through the above technical solution, during the transfer case power take-off process, the system receives the vehicle auxiliary air circuit pressure sent by the air pressure sensor; it determines whether the vehicle auxiliary air circuit pressure is lower than a preset value. If it is lower than the preset value, the system controls the chassis to exit steering mode, controls the upper hydraulic lock to engage and lock, and controls the engine to return to idle speed. Then, it controls the steering circuit auxiliary power take-off valve to be energized to supply air to the transfer case; it also determines whether the transfer case's power take-off limit switch and neutral limit switch are closed; if the power take-off limit switch and neutral limit switch are closed, the upper hydraulic lock is released and the engine idle speed is released. This application improves the stability of the transfer case power take-off and enhances operational safety by using the auxiliary circuit power take-off valve to supply air to the transfer case to continue power take-off when air leakage occurs during the power take-off process.

[0123] This application also provides a machine-readable storage medium storing instructions that cause a machine to perform the above-described method for power take-off protection of a transfer case.

[0124] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can 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, etc.) containing computer-usable program code.

[0125] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0126] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0127] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0128] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0129] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0130] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0131] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0132] The above are merely embodiments of this application and are not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A method for transfer case power take-off protection, applied to a controller, wherein the controller communicates with a pressure sensor, chassis, upper vehicle hydraulic lock, engine, and steering circuit auxiliary power take-off valve, characterized in that, The method includes: During the power take-off process of the transfer case, the vehicle auxiliary air circuit pressure sent by the air pressure sensor is received; Determine whether the air pressure in the vehicle's auxiliary air circuit is lower than a preset value; When the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, the chassis is controlled to exit the steering mode, the upper hydraulic lock is controlled to lock, and the engine is controlled to return to idle speed. After the chassis exits the steering mode, the upper hydraulic lock completes its locking action, and the engine returns to idle speed, the auxiliary power take-off valve of the steering circuit is energized to supply air to the transfer case. Determine whether the power take-off limit switch and the neutral limit switch of the transfer case are closed; With the power take-off limit switch and neutral limit switch closed, the upper vehicle hydraulic lock is released and the engine's idling state is deactivated.

2. The method according to claim 1, characterized in that, The method further includes: If the power take-off limit switch and / or neutral limit switch are not closed, continue to energize the auxiliary power take-off valve of the steering circuit until the power take-off limit switch and the neutral limit switch are closed.

3. The method according to claim 1, characterized in that, The controller also communicates with the display screen, and the method further includes: If the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, a fault warning message is sent to the display screen.

4. The method according to claim 3, characterized in that, The method further includes: When the power take-off limit switch and the neutral limit switch are closed, a stop fault warning message is sent to the display screen.

5. The method according to claim 1, characterized in that, The controller also communicates with the vehicle throttle, and the method further includes: If the air pressure in the vehicle's auxiliary air circuit is lower than the preset value, the vehicle throttle will not respond.

6. A controller, characterized in that, include: The memory is configured to store instructions; as well as The processor is configured to retrieve the instructions from the memory and, when executing the instructions, to implement the transfer case power take-off protection method according to any one of claims 1 to 5.

7. A device for protecting the power take-off of a transfer case, characterized in that, include: The controller according to claim 6; A pressure sensor, which communicates with the controller, is configured to monitor the air pressure in the vehicle's auxiliary air circuit and send the data to the controller. The chassis, which communicates with the controller, is configured to receive instructions from the controller and exit the slewing mode; The upper hydraulic lock communicates with the controller and is configured to receive instructions from the controller and perform locking actions. The engine, in communication with the controller, is configured to receive instructions from the controller and resume idling. The steering circuit auxiliary power take-off valve communicates with the controller and is configured to receive commands from the controller and be energized to supply air to the transfer case.

8. The apparatus according to claim 7, characterized in that, Also includes: The display screen, which communicates with the controller, is configured to display a fault warning when the air pressure in the vehicle's auxiliary air circuit is lower than a preset value, and to display a warning cancellation prompt when the power take-off limit switch and the neutral limit switch are closed.

9. The apparatus according to claim 7, characterized in that, Also includes: The vehicle throttle is configured to communicate with the controller and, when the vehicle's auxiliary air circuit pressure is lower than the preset value, receive a command from the controller to disable the vehicle throttle.

10. A machine-readable storage medium, characterized in that, The machine-readable storage medium stores instructions for causing the machine to perform the transfer case power take-off protection method according to any one of claims 1 to 5.

Images