Anti-disengaging control method and system for silicone oil clutch fan, storage medium and engineering machinery

Abstract

The invention discloses an anti-disengaging control method and system for a silicone oil clutch fan, a storage medium and engineering machinery, and the method comprises the steps: carrying out common processing or emergency processing according to the type of an obtained shutdown request signal; wherein the emergency processing is to directly send a stop instruction to an engine, and the common processing is to respectively send a first control instruction that the engine enters a low idling mode and a second control instruction that a silicone oil clutch fan is disengaged to the engine and the silicone oil clutch fan; judging whether the fan rotating speed is smaller than a threshold value or not according to the fan rotating speed in the silicone oil clutch fan and the engine rotating speed, and sending a shutdown instruction to the engine when the fan rotating speed is smaller than the threshold value; when the rotating speed of the fan is not smaller than the threshold value, the timer is controlled to start timing, and if the time displayed by the timer is larger than preset time, a stop instruction is sent to the engine; the problem that the fan falls off due to the fact that the fan is shut down immediately when the fan rotates at a high speed in the combination state of the silicone oil clutch and the fan can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of silicone oil clutch fans for engineering machinery, and in particular to a silicone oil clutch fan anti-detachment control method, system, storage medium and engineering machinery. Background Art

[0002] The silicone oil clutch fan, which is widely used in construction machinery, is cleverly designed with a bolt connection method to ensure the stability and safety of the fan assembly. This connection method not only requires the material and strength of the bolts to meet certain standards, but also pays special attention to the setting of the thread direction. Normally, the thread direction of the silicone oil clutch fan is opposite to the rotation direction of the engine drive wheel. Such a design has far-reaching considerations: when the engine drive wheel rotates, the rotational force it generates will try to loosen the bolts, but due to the clever arrangement of the thread direction, this loosening tendency is actually converted into a tightening force, thereby greatly reducing the risk of the fan falling off during use.

[0003] However, based on the above-mentioned clever reverse bolt connection design, the control logic of the silicone oil clutch has become another issue that needs attention. In the existing control system, the disengagement and engagement of the silicone oil clutch fan (the disengagement and engagement between the silicone oil clutch and the fan) is often controlled by the vehicle controller or. This control method realizes the automatic management of the silicone oil clutch fan to a certain extent, but unfortunately, it does not fully consider the operating status of the whole machine and the fan. Especially when the whole machine is shut down, if the silicone oil clutch is still in the engaged state, the impact force generated by the fan due to the rotational inertia may become a problem that cannot be ignored. This impact force will not only cause certain wear on the silicone oil clutch itself, but more importantly, it will also exert a huge impact force on the bolts connecting the fan. Over time, this repeated impact may cause the bolts to gradually loosen, or even reach the critical point of falling off.

[0004] Once the bolts are loosened to the point where they can no longer withstand the force generated by the fan's rotation, the fan may fall off. This will not only cause the construction machinery to shut down, but may also cause a series of safety issues. The falling fan may damage surrounding equipment and personnel, causing serious economic losses and personal injuries. Summary of the invention

[0005] The purpose of the present invention is to provide a silicone oil clutch fan anti-detachment control method, system, storage medium and engineering machinery, which can prevent the silicone oil clutch fan connection thread from loosening due to the fan being shut down immediately at high speed when the silicone oil clutch fan is engaged, and prevent the fan from falling off.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: In a first aspect, the present invention provides a silicone oil clutch fan anti-detachment control method, comprising: Get the shutdown request signal, as well as the real-time silicone oil clutch fan speed and engine speed; Determining the type of the acquired stop request signal, where the type of the stop request signal is a key switch signal and an emergency stop request signal; When the stop request signal is an emergency stop request signal, a stop command is directly sent to the engine; When the shutdown request signal is a key switch signal, a first control instruction and a second control instruction are sent to the engine and the silicone oil clutch fan respectively; the first control instruction is for the engine to enter a low idle mode; the second control instruction is for the silicone oil clutch fan to perform a disengagement operation; After the engine enters the low idle mode and the silicone oil clutch fan is disengaged, judging whether the fan speed is less than a threshold value according to the fan speed of the silicone oil clutch fan and the engine speed, the threshold value being equal to the product of the coupling rate of the silicone oil clutch after the disengagement operation and the engine speed; When the fan speed is less than the threshold, a shutdown command is sent to the engine; when the fan speed is not less than the threshold, the control timer starts timing, and if the time displayed by the timer is greater than the preset time, a shutdown command is sent to the engine.

[0007] Optionally, when the shutdown request signal is a key switch signal, the current throttle gear position is judged, and if the current throttle gear position is not the lowest gear position, a first reminder signal is sent to the display device, wherein the first reminder signal is used to remind the operator to adjust the throttle gear position to the lowest gear.

[0008] Optionally, when the time displayed by the timer is greater than a preset time, a second reminder signal is sent to the display device, and the second reminder signal is used to remind the operator that there is a fault in the silicone oil clutch fan.

[0009] Optionally, the emergency stop request signal includes: a key switch signal that is triggered multiple times within a specified time and a separate emergency stop signal.

[0010] In a second aspect, the present invention provides a silicone oil clutch fan anti-detachment control system, comprising: A whole machine controller, and a data acquisition module, a silicone oil clutch fan and an engine respectively connected to the whole machine controller; The whole machine controller is used to implement the silicone oil clutch fan anti-detachment control method according to any one of claims 1 to 4; The data acquisition module is connected to the silicone oil clutch fan and the engine respectively, and is used to collect the speed of the silicone oil clutch fan and the speed of the engine in real time, and transmit them to the whole machine controller; The silicone oil clutch fan comprises a silicone oil clutch and a fan, and is used to receive a first control instruction to perform a disengagement operation between the silicone oil clutch and the fan; The engine is used to receive the second control instruction to enter the idle mode, and is used to receive the shutdown instruction to perform the shutdown operation.

[0011] Optionally, the whole machine controller includes: An acquisition module, used to acquire a shutdown request signal, as well as real-time silicone oil clutch fan speed and engine speed; A type determination module, used to determine the type of the acquired stop request signal, where the type of the stop request signal is a key switch signal and an emergency stop request signal; An emergency processing module, used for directly sending a shutdown command to the engine when the shutdown request signal is an emergency shutdown request signal; A common processing module, comprising a first processing unit, a comparison unit and a second processing unit; The first processing unit is used to send a first control instruction and a second control instruction to the engine and the silicone oil clutch fan respectively when the shutdown request signal is a key switch signal; the first control instruction is for the engine to enter a low idle mode; the second control instruction is for the silicone oil clutch fan to perform a disengagement operation; a comparison unit, for judging whether the fan speed is less than a threshold value according to the speed of the silicone oil clutch fan and the engine speed after the engine enters the low idle mode and the silicone oil clutch fan performs a disengagement operation, wherein the threshold value is equal to the product of the coupling rate of the silicone oil clutch after the disengagement operation and the engine speed; The second processing unit is used to send a shutdown command to the engine when the fan speed is less than a threshold; when the fan speed is not less than the threshold, the control timer starts timing, and if the time displayed by the timer is greater than the preset time, a shutdown command is sent to the engine.

[0012] Optionally, the whole machine controller also includes a gear judgment unit and a time judgment unit. The gear judgment unit is used to judge the current throttle gear when the shutdown request signal is a key switch signal, and if the current throttle gear is not the lowest gear, send a first reminder signal to the display device; the time judgment unit is used to send a second reminder signal to the display device when the time displayed by the timer is greater than the preset time.

[0013] Optionally, the system further comprises a display device for displaying according to the first reminder signal or the second reminder signal sent by the whole machine controller.

[0014] In a third aspect, the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the silicone oil clutch fan anti-detachment control method as described in the first aspect.

[0015] In a fourth aspect, a construction machine is provided, characterized in that it comprises the silicone oil clutch fan anti-detachment control system as described in the second aspect.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a silicone oil clutch fan anti-detachment control method, system, storage medium and engineering machinery. The control method, after obtaining a stop request signal, first determines the type of the stop request signal. If it is an emergency stop request signal, directly sends a stop command to avoid serious problems of the whole machine due to failure to stop immediately due to unexpected circumstances; if it is a common stop request signal, i.e., a key switch signal, a comprehensive determination is made in combination with the whole machine state (engine and fan speed), and a control command is sent based on the determination result to execute a stop operation to avoid the situation where the bolts between the silicone oil clutch and the fan fall off due to high-speed fan shutdown, thereby causing the fan to fall off; wherein the determination result includes that the fan speed is lower than a threshold value or the fan speed is higher than a threshold value and satisfies a certain period of time; The present invention provides a silicone oil clutch fan anti-detachment control method, system, storage medium and engineering machinery. The method can also judge the current throttle gear position. If the current throttle gear position is not the lowest gear position, a first reminder signal "the throttle gear position should be the lowest when shutting down" is sent to a display device, which helps to reduce fuel consumption, extend the service life of the engine and transmission, and improve the safety of the entire machine.

[0017] The present invention provides a silicone oil clutch fan anti-detachment control method, system, storage medium and engineering machinery. The method can also send a second reminder signal "silicone oil clutch fan is faulty" to a display device when the time displayed by a timer is greater than a preset time, so as to remind the operator to perform maintenance and improve the safety of the entire machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative labor, among which: Figure 1 The figure is a schematic flow chart of a method for preventing a silicone oil clutch fan from falling off in Embodiment 1 of the present invention; Figure 2 The figure is a schematic flow chart of a method for preventing a silicone oil clutch fan from falling off in Embodiment 2 of the present invention; Figure 3 The figure shows a schematic structural diagram of a silicone oil clutch fan anti-detachment control system in Example 3 of the present invention; Figure 4 The figure shows a schematic diagram of the structure of the whole machine controller in the third embodiment of the present invention. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present disclosure. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments can have different values.

[0021] Example 1

[0022] refer to Figure 1 The embodiment of the present invention introduces a silicone oil clutch fan anti-detachment control method, comprising the following steps: Get data: Get the shutdown request signal, as well as the real-time silicone oil clutch fan speed and engine speed; Type judgment: judging the type of the obtained stop request signal, the type of the stop request signal being a key switch signal and an emergency stop request signal; Emergency processing: When the stop request signal is an emergency stop request signal, a stop command is directly sent to the engine; Normal processing: when the shutdown request signal is a key switch signal, the first control instruction and the second control instruction are sent to the engine and the silicone oil clutch fan respectively; the first control instruction is for the engine to enter the low idle mode; the second control instruction is for the silicone oil clutch fan to be disengaged; After the engine enters the low idle mode and the silicone oil clutch fan is disengaged, judging whether the fan speed is less than a threshold value according to the fan speed of the silicone oil clutch fan and the engine speed, the threshold value being equal to the product of the coupling rate k of the silicone oil clutch after the disengagement operation and the engine speed; When the fan speed is less than the threshold, a shutdown command is sent to the engine; when the fan speed is not less than the threshold, the control timer starts timing, and if the time displayed by the timer is greater than the preset time T, a shutdown command is sent to the engine.

[0023] Specifically, the emergency stop request signal includes: a key switch signal that is triggered multiple times within a specified time and a separate emergency stop signal.

[0024] Specifically, the preset time T is the longest time for the clutch to disengage and reach k*input speed at the specified input speed calibrated on the test bench, which is determined according to parameters such as engine water temperature, hydraulic oil temperature, fan speed, silicone clutch state, etc.; Specifically, the coupling rate k of the silicone oil clutch after the disengagement operation should be zero in theory, but in actual application it may be affected by various factors and have a certain small value. For the specific coupling rate value, it is necessary to conduct actual measurement and evaluation based on factors such as the specific model, structure and working conditions of the clutch.

[0025] Specifically, the engine enters the low idle mode based on the engine controller ECM receiving a first control instruction through the bus SAEJ1939 to control the engine to enter the low idle mode; Specifically, the disengagement operation of the silicone oil clutch fan is based on the silicone oil clutch fan receiving the second control instruction from the I / O line. The temperature sensor (bimetallic strip) inside the silicone oil clutch fan is deformed according to the temperature change. When the temperature of the air flowing through the radiator increases, the bimetallic strip is deformed by heat. This deformation is converted into mechanical force, thereby controlling the disengagement or engagement of the fan. Since the silicone oil clutch fan itself and the disengagement operation are not the inventive point of the present invention, they will not be described in detail here; After obtaining the shutdown request signal, the embodiment of the present invention first determines the type of the shutdown request signal. If it is an emergency shutdown request signal, a shutdown command is directly sent to avoid serious problems with the entire machine due to failure to shut down immediately due to unexpected circumstances. If it is a normal shutdown request signal, that is, a key switch signal, a comprehensive judgment is made in combination with the entire machine status (engine and fan speed), and a control command is sent based on the judgment result to execute the shutdown operation to avoid the high-speed shutdown of the fan causing the bolts between the silicone oil clutch and the fan to fall off, thereby causing the fan to fall off.

[0026] Example 2

[0027] refer to Figure 2 The embodiment of the present invention introduces a silicone oil clutch fan anti-detachment control method, comprising the following steps: Get data: Get the shutdown request signal, as well as the real-time silicone oil clutch fan speed and engine speed; Type judgment: judging the type of the obtained stop request signal, the type of the stop request signal being a key switch signal and an emergency stop request signal; Emergency processing: When the stop request signal is an emergency stop request signal, a stop command is directly sent to the engine; Normal processing: When the shutdown request signal is a key switch signal, the current throttle gear is judged. If the current throttle gear is not the lowest gear, a first reminder signal is sent to the display device, and the first reminder signal is used to remind the operator to adjust the throttle gear to the lowest gear.

[0028] Sending a first control instruction and a second control instruction to the engine and the silicone oil clutch fan respectively; the first control instruction is for the engine to enter a low idle mode; the second control instruction is for the silicone oil clutch fan to perform a disengagement operation; After the engine enters the low idle mode and the silicone oil clutch fan is disengaged, judging whether the fan speed is less than a threshold value according to the fan speed of the silicone oil clutch fan and the engine speed, the threshold value being equal to the product of the coupling rate k of the silicone oil clutch after the disengagement operation and the engine speed; When the fan speed is less than a threshold, a shutdown command is sent to the engine; when the fan speed is not less than the threshold, the control timer starts timing. If the time displayed by the timer is greater than the preset time T, a second reminder signal is sent to the display device. The second reminder signal is used to remind the operator that there is a fault in the silicone oil clutch fan and send a shutdown command to the engine.

[0029] A silicone oil clutch fan anti-detachment control method introduced in Example 2 adds two reminder signals to the display module on the basis of Example 1, respectively, to judge the current throttle gear position. If the current throttle gear position is not the lowest gear position, a first reminder signal "the throttle gear position should be the minimum when shutting down" is sent to the display device; and when the time displayed by the timer is greater than the preset time, a second reminder signal "the silicone oil clutch fan is faulty" is sent to the display device to remind the operator to perform maintenance, thereby improving the safety of the entire machine.

[0030] Example 3

[0031] like Figure 3 As shown, in this embodiment, the present invention also introduces a silicone oil clutch fan anti-detachment control system, including: A whole machine controller, and a data acquisition module, a silicone oil clutch fan and an engine respectively connected to the whole machine controller; A whole machine controller, used to implement the silicone oil clutch fan anti-detachment control method as described in Example 1 / Example 2; The data acquisition module is connected to the silicone oil clutch fan and the engine respectively, and is used to collect the speed of the silicone oil clutch fan and the engine in real time, and transmit them to the whole machine controller; The silicone oil clutch fan comprises a silicone oil clutch and a fan, and is used to receive a first control instruction to perform a disengagement operation between the silicone oil clutch and the fan; The engine is used to receive the second control instruction to perform an idle mode, and is used to receive a shutdown instruction to perform a shutdown operation.

[0032] Specifically, the system also includes a display device (screen monitor) for displaying according to the first reminder signal or the second reminder signal sent by the whole machine controller.

[0033] like Figure 4 As shown, in this embodiment, the whole machine controller includes: an acquisition module, a type judgment module, an emergency processing module and a normal processing module; The acquisition module is connected to the data acquisition module and is used to obtain the shutdown request signal, as well as the real-time silicone oil clutch fan speed and engine speed; The type determination module is connected to the acquisition module and is used to determine the type of the acquired stop request signal, where the type of the stop request signal is a key switch signal and an emergency stop request signal; The emergency processing module is connected to the type judgment module and is used to directly send a shutdown command to the engine when the shutdown request signal is an emergency shutdown request signal; The common processing module is connected to the type judgment module, and includes a first processing unit, a comparison unit, and a second processing unit connected in sequence; The first processing unit is used to send a first control instruction and a second control instruction to the engine and the silicone oil clutch fan respectively when the shutdown request signal is a key switch signal; the first control instruction is for the engine to enter a low idle mode; the second control instruction is for the silicone oil clutch fan to perform a disengagement operation; a comparison unit, for judging whether the fan speed is less than a threshold value according to the speed of the silicone oil clutch fan and the engine speed after the engine enters the low idle mode and the silicone oil clutch fan performs a disengagement operation, wherein the threshold value is equal to the product of the coupling rate of the silicone oil clutch after the disengagement operation and the engine speed; The second processing unit is used to send a shutdown command to the engine when the fan speed is less than a threshold; when the fan speed is not less than the threshold, the control timer starts timing, and if the time displayed by the timer is greater than the preset time, a shutdown command is sent to the engine.

[0034] In this embodiment, the whole machine controller also includes a gear judgment unit and a time judgment unit. The gear judgment unit can be arranged between the general processing module and the type judgment module, and is used to judge the current throttle gear when the shutdown request signal is a key switch signal. If the current throttle gear is not the lowest gear, a first reminder signal is sent to the display device; the time judgment unit can be arranged after the second processing unit, and is used to send a second reminder signal to the display device when the time displayed by the timer is greater than the preset time.

[0035] Example 4

[0036] In this embodiment, the present invention further introduces a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in Embodiment 1 or Embodiment 2 are implemented.

[0037] Example 5

[0038] In this embodiment, the present invention also introduces an engineering machinery, including: the silicone oil clutch fan anti-detachment control system as described in Example 3 Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0039] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0040] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0041] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0042] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

Claims

1. A silicone oil clutch fan anti-detachment control method, characterized in that: include: Get the shutdown request signal, as well as the real-time silicone oil clutch fan speed and engine speed; Determining the type of the acquired stop request signal, where the type of the stop request signal is a key switch signal and an emergency stop request signal; When the stop request signal is an emergency stop request signal, a stop command is directly sent to the engine; When the shutdown request signal is a key switch signal, a first control instruction and a second control instruction are sent to the engine and the silicone oil clutch fan respectively; the first control instruction is for the engine to enter a low idle mode; the second control instruction is for the silicone oil clutch fan to perform a disengagement operation; After the engine enters the low idle mode and the silicone oil clutch fan is disengaged, judging whether the fan speed is less than a threshold value according to the fan speed of the silicone oil clutch fan and the engine speed, the threshold value being equal to the product of the coupling rate of the silicone oil clutch after the disengagement operation and the engine speed; When the fan speed is less than the threshold, a shutdown command is sent to the engine; when the fan speed is not less than the threshold, the control timer starts timing, and if the time displayed by the timer is greater than the preset time, a shutdown command is sent to the engine.

2. The method for preventing the fan from falling off of a silicone oil clutch according to claim 1, characterized in that: When the shutdown request signal is a key switch signal, the current throttle gear position is judged, and if the current throttle gear position is not the lowest gear position, a first reminder signal is sent to the display device, wherein the first reminder signal is used to remind the operator to adjust the throttle gear position to the lowest gear.

3. The method for preventing the fan from falling off of a silicone oil clutch according to claim 1, characterized in that: When the time displayed by the timer is greater than the preset time, a second reminder signal is sent to the display device, and the second reminder signal is used to remind the operator that there is a fault in the silicone oil clutch fan.

4. The method for preventing the fan from falling off of a silicone oil clutch according to claim 1, characterized in that: The emergency stop request signal includes: a key switch signal that is triggered multiple times within a specified time and a separate emergency stop signal.

5. A silicone oil clutch fan anti-detachment control system, characterized in that: include: A whole machine controller, and a data acquisition module, a silicone oil clutch fan and an engine respectively connected to the whole machine controller; The whole machine controller is used to implement the silicone oil clutch fan anti-detachment control method according to any one of claims 1 to 4; The data acquisition module is connected to the silicone oil clutch fan and the engine respectively, and is used to collect the speed of the silicone oil clutch fan and the speed of the engine in real time, and transmit them to the whole machine controller; The silicone oil clutch fan comprises a silicone oil clutch and a fan, and is used to receive a first control instruction to perform a disengagement operation between the silicone oil clutch and the fan; The engine is used to receive the second control instruction to enter the idle mode, and is used to receive the shutdown instruction to perform the shutdown operation.

6. The silicone oil clutch fan anti-detachment control system according to claim 5, characterized in that: The whole machine controller comprises: An acquisition module, used to acquire a shutdown request signal, as well as real-time silicone oil clutch fan speed and engine speed; A type determination module, used to determine the type of the acquired stop request signal, where the type of the stop request signal is a key switch signal and an emergency stop request signal; An emergency processing module, used for directly sending a shutdown command to the engine when the shutdown request signal is an emergency shutdown request signal; A common processing module, comprising a first processing unit, a comparison unit and a second processing unit; The first processing unit is used to send a first control instruction and a second control instruction to the engine and the silicone oil clutch fan respectively when the shutdown request signal is a key switch signal; the first control instruction is for the engine to enter a low idle mode; the second control instruction is for the silicone oil clutch fan to perform a disengagement operation; a comparison unit, for judging whether the fan speed is less than a threshold value according to the speed of the silicone oil clutch fan and the engine speed after the engine enters the low idle mode and the silicone oil clutch fan performs a disengagement operation, wherein the threshold value is equal to the product of the coupling rate of the silicone oil clutch after the disengagement operation and the engine speed; The second processing unit is used to send a shutdown command to the engine when the fan speed is less than a threshold; when the fan speed is not less than the threshold, the control timer starts timing, and if the time displayed by the timer is greater than the preset time, a shutdown command is sent to the engine.

7. The silicone oil clutch fan anti-detachment control system according to claim 5, characterized in that: The whole machine controller also includes a gear judgment unit and a time judgment unit. The gear judgment unit is used to judge the current throttle gear when the shutdown request signal is a key switch signal. If the current throttle gear is not the lowest gear, a first reminder signal is sent to the display device; the time judgment unit is used to send a second reminder signal to the display device when the time displayed by the timer is greater than a preset time.

8. The silicone oil clutch fan anti-detachment control system according to claim 5, characterized in that: The system further comprises a display device for displaying according to the first reminder signal or the second reminder signal sent by the whole machine controller.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the silicone oil clutch fan anti-detachment control method as described in any one of claims 1-4 are implemented.

10. An engineering machine, characterized in that: It includes the silicone oil clutch fan anti-detachment control system as described in claim 5.

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