Work machine flameout delay control method, control circuit, and work machine

Abstract

The embodiment of the application provides a work machine flameout delay control method, a control circuit and a work machine, and relates to the technical field of work machines. The method comprises the following steps: when it is detected that the engine after starting is in an abnormal working condition, a first level is generated to maintain the energized state of a vehicle contactor and a relay for controlling the power supply of vehicle accessories; during the duration of the first level, if a flameout signal is received, first timing is started; after the first timing reaches a first preset time length, the generation of the first level is stopped, a second level is generated to maintain the energized state of the vehicle contactor, and second timing is started; after the second timing reaches a second preset time length, the generation of the second level is stopped. The embodiment provided by the application reduces the ECM module software failure and mechanical damage to the engine caused by the abnormal shutdown of the engine in the engine flameout scene in the harsh working condition construction.

Description

Technical Field

[0001] This application relates to the field of work machinery technology, specifically to a work machinery shutdown delay control method, a work machinery shutdown delay control circuit, a work machinery, and a computer-readable storage medium. Background Technology

[0002] Diesel engines are typically the core power component of construction machinery, providing power to the walking system and working devices. They feature low-speed, high-torque characteristics to meet the demands of continuous excavation operations. Engine shutdown control plays a crucial role during engine shutdown operations.

[0003] For modern high-power engines with electronic control systems, a sudden power outage during operation can easily lead to program malfunctions or loss of critical operational data in the engine control module (ECM), the core control unit. When the vehicle's electrical system is powered on again, the ECM module will send the relevant fault information recorded at the moment of shutdown to the driver's cab display screen. This may not only restrict the engine's normal restart due to fault code locking, affecting equipment uptime and work efficiency, but also hides a deeper risk of mechanical damage. Particularly noteworthy is that a sudden stop at high speed can cause the turbocharger's turbine shaft to continue rotating at high speed due to inertia, while the oil pump has stopped supplying oil. The bearing system, lacking lubrication, will dry-grind, easily causing abnormal wear or even complete damage to the turbocharger, resulting in high repair costs and longer downtime. Furthermore, the high power output requirements of very large machinery make it impractical to use a backup energy storage module to provide temporary power for a normal shutdown.

[0004] Therefore, how to effectively avoid ECM malfunctions and mechanical component damage caused by abnormal engine shutdown is a technical problem that urgently needs to be solved in the field of machine tool control. Summary of the Invention

[0005] The purpose of this application is to provide a method, control circuit, and operating machinery for controlling engine shutdown delay. Based on abnormal working conditions and the operating habits of excavator operators, the engine shutdown delay is actively performed, effectively avoiding the hidden danger of engine failure due to abnormal engine shutdown, which may prevent the engine from starting normally the next time. This solves at least some of the problems in the background art.

[0006] To achieve the above objectives, this application provides a method for controlling the engine shutdown delay of operating machinery. The method includes: when an abnormal operating condition is detected in the started engine, generating a first level to maintain the energized state of the vehicle contactor and the relay for controlling the power supply of vehicle accessories; during the duration of the first level, if an engine shutdown signal is received, starting a first timer; after the first timer reaches a first preset duration, stopping the generation of the first level and generating a second level to maintain the energized state of the vehicle contactor, while starting a second timer; after the second timer reaches a second preset duration, stopping the generation of the second level.

[0007] Preferably, the engine is started through the following steps: after the main power switch is closed, the vehicle electrical system is in a state of constant power supply; the intelligent power distribution box relay used to control the on / off state of the vehicle accessory power supply receives the power-on signal, and the vehicle accessory power controller is in a energized state; the vehicle contactor obtains the vehicle accessory power supply and enters the energized state; when the vehicle controller receives the engine start signal, it triggers the engine control module to control the starter motor to start the engine.

[0008] Preferably, the abnormal operating conditions of the engine after startup include: one or more of the real-time engine status data read by the vehicle control program exceeding a set threshold; or the engine control module outputting abnormal engine information or warning information during engine operation.

[0009] Preferably, the method further includes: when an abnormal operating condition is detected in the started engine, restricting the working components in the vehicle; the restriction of the working components in the vehicle includes: limiting the engine's operating speed to idle speed; limiting the pilot solenoid valve of the vehicle controller to low-level output; and restricting some interactive functions of the human-machine interface.

[0010] Preferably, the method further includes: saving engine status data during the first timing period and outputting a shutdown delay prompt.

[0011] A second aspect of this application also provides a work machinery shutdown delay control circuit, the circuit comprising: a vehicle controller, a vehicle contactor, and an intelligent power distribution box, the intelligent power distribution box including a relay for controlling the power supply of vehicle accessories; the vehicle controller is configured to execute the aforementioned work machinery shutdown delay control method; a first pin of the vehicle controller is connected to the control terminal of the vehicle contactor, and the normally open contacts of the vehicle contactor are respectively connected to the vehicle's constant power supply and the vehicle's electrical system; a second pin of the vehicle controller is connected to the control terminal of the vehicle contactor and the control terminal of the relay controlling the power supply of vehicle accessories; the normally open contacts of the relay controlling the power supply of vehicle accessories are respectively connected to the vehicle accessory power supply and the vehicle's electrical system.

[0012] Preferably, the circuit further includes an engine control module; the engine control module is connected to a communication bus; the engine control module draws power from the vehicle's constant power supply and from the vehicle's electrical system.

[0013] Preferably, the circuit further includes a human-machine interface; the human-machine interface is connected to a communication bus; the human-machine interface draws power from the vehicle's constant power supply.

[0014] This application also provides a working machine, wherein at least one processor of the working machine is configured to execute the aforementioned working machine shutdown delay control method, or the working machine includes the aforementioned working machine shutdown delay control circuit.

[0015] This application also provides an electronic device, including: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the at least one processor implements the aforementioned method for controlling the shutdown delay of operating machinery by executing the instructions stored in the memory.

[0016] This application also provides a machine-readable storage medium storing instructions that, when executed by a processor, configure the processor to perform the aforementioned machine shutdown delay control method.

[0017] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the aforementioned method for controlling the shutdown delay of operating machinery.

[0018] The above technical solution has the following beneficial effects: By identifying abnormal engine operating conditions during construction, and proactively delaying engine shutdown based on these abnormal conditions and the excavator operator's habits, this effectively prevents abnormal engine shutdown from causing engine malfunctions and the potential for the engine to fail to start normally the next time, thus providing effective engine protection. The control circuit and method in this application are particularly suitable for ultra-large excavators.

[0019] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0020] 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: Figure 1The schematic diagram illustrates the steps of a method for controlling the engine shutdown delay according to an embodiment of this application; Figure 2 The illustration shows a schematic diagram of an implementation of a machine shutdown delay control method according to an embodiment of this application; Figure 3 This illustration schematically shows a structural diagram of a machine shutdown delay control circuit according to an embodiment of this application; Figure 4 The diagram schematically illustrates the internal structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0021] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the embodiments of this application.

[0022] It should be understood that the method for controlling the engine shutdown delay of a work machine provided in this application embodiment can be applied to work machines, and optionally, the work machine is an ultra-large excavator. Figure 1 The schematic diagram illustrates the steps of a method for controlling the engine shutdown delay according to an embodiment of this application, wherein the method includes: S01. When an abnormal operating condition is detected in the started engine, a first level is generated to maintain the energization of the vehicle contactor and relay. The relay is the vehicle accessory power relay, used to control the vehicle accessory power supply. The abnormal operating condition indication of the engine can be generated by the preset logic itself in the execution body of step S01, or it can be generated by receiving an externally generated abnormal operating condition indication of the engine. The first level here is determined according to the electrical characteristics of the controlled device, with a high level being preferred. For example, if the vehicle contactor is controlled by this level (high level), the normally open contacts of the vehicle contactor are still in the closed state, that is, the electrical components of the vehicle electrical system are under normal power supply. The vehicle accessory power supply (Accessory, ACC power supply) refers to the power supply after the vehicle's constant power supply passes through the normally open contacts of the relay in the intelligent power distribution box, and is controlled by the power-on signal of the one-button start switch through the relay coil wire number of the intelligent power distribution box.

[0023] S02. During the duration of the first level, if a shutdown signal is received, the first timing begins. Preferably, the shutdown signal for the entire vehicle originates from the user's operation of rotating the one-button start switch to the "OFF" position. At this time, the corresponding input pin of the vehicle controller does not receive a power-on signal, indicating that a shutdown signal for the entire vehicle has been received. This timing operation can be performed by creating a timing task in the program or by using a timing register. During the first timing period, even if a shutdown signal for the entire vehicle has been received, the current state of the vehicle contactor and ACC power supply is maintained, avoiding malfunctions or potential faults caused by a momentary power outage to the engine.

[0024] S03. After the first timing reaches the first preset duration, the generation of the first level is stopped, and a second level is generated to maintain the energized state of the vehicle contactor. At the same time, the second timing begins. The second level is connected to the control terminal of the vehicle contactor to maintain its current state. During the second timing operation, the current state of the vehicle contactor is still maintained. At this time, the vehicle electrical system is kept powered on, mainly so that the human-machine interface can still work normally. The operator of the working machinery can see the current state of the working machinery through the human-machine interface, avoiding misjudgment of the fault or cause of the fault of the working machinery.

[0025] S04. After the second timing reaches the second preset duration, stop generating the second level. Here, the first and second preset durations are preferably obtained from the parameter setting interface of the human-machine interface via the communication bus, and different parameters are set according to different engine brands and actual operating conditions. Furthermore, the timing durations in the two steps are not necessarily the same. The timing duration in step S03 is set as the engine shutdown delay setting duration, denoted as t1; the timing duration in step S04 is set as the power-off delay setting duration, denoted as t2. t1 and t2 are preferably obtained by the vehicle controller from the parameter setting interface of the human-machine interface via the communication bus, and different values ​​are set according to different engine brands and actual operating conditions.

[0026] In step S01, when it is detected that the engine is in an abnormal operating condition after startup, the first level of this application only affects the energization state of the vehicle contactor and relay, and does not affect or directly affect the handling of the abnormal engine operating condition by the working machinery. The working machinery can still run its preset abnormal engine operating condition handling logic or program.

[0027] In step S04, if the second level has stopped, the energization state of the vehicle contactors and relays is no longer affected by the first and second levels. Instead, it is determined according to the preset logic or program for ignition control in response to the ignition signal. That is, the working machinery performs the normal power-off procedure in response to the ignition signal. Normally, the preset logic or program for ignition control, which is independent of the level state of the vehicle contactors and relays, is executed after being triggered by the ignition signal in step S02.

[0028] Through the above implementation methods, the engine shutdown delay is proactively implemented based on abnormal working conditions and the operating habits of excavator operators, effectively avoiding the hidden danger of engine failure due to abnormal engine shutdown causing engine malfunction and preventing the engine from starting normally the next time.

[0029] In some embodiments of this application, the aforementioned first level and second level are output by different pins of the chip that performs the machine shutdown delay control method.

[0030] In some embodiments of this application, the engine is started via the following steps: after the main power switch is closed, the vehicle electrical system is in a constant power supply state; the intelligent power distribution box relay, used to control the on / off state of the vehicle accessory power supply, receives a power-on signal, and the vehicle accessory power controller is energized; the vehicle contactor acquires the vehicle accessory power supply and enters an energized state; when the vehicle controller receives an engine start signal, it triggers the engine control module to control the starter motor to start the engine. Specifically, when it is detected that the main power switch has been closed by an operator, the vehicle electrical system is in a constant power supply state, that is, the vehicle battery provides power to the vehicle electrical system. The intelligent power distribution box relay, used to control the power on / off status of vehicle accessories, receives a power-on signal. This power-on signal can be generated by rotating the one-button start switch to the "ON" position. The power-on signal enters the relay in the intelligent power distribution box, energizing the relay coil and closing its normally open contact to obtain the vehicle's ACC power. The ACC power then passes through a diode to the coil of the vehicle's contactor, energizing the coil and closing the normally open contact of the contactor to obtain the vehicle's control power. The vehicle's electrical system is powered on, and electrical components operate normally. The power-on signal from the one-button start switch enters the DI1 port of the vehicle controller, which records that the vehicle's electrical system is powered on. In some optional embodiments, the vehicle controller also provides current status feedback through lights. For example, the vehicle controller output port DO3 outputs a high level to the one-button start switch to illuminate a red indicator light, indicating that the engine is not started. The vehicle controller outputs the result of logic operations to the engine ECM module, which controls the starter motor to start the engine. When the vehicle controller reads the engine speed signal via the communication bus, it outputs a high level through the DO4 port, illuminating the green indicator light on the one-button start switch, indicating that the engine has started. Simultaneously, the DO3 port stops outputting, and the red indicator light on the one-button start switch goes out. At this time, the operator can check information such as engine speed, coolant temperature, output torque, and generator voltage through the status display on the human-machine interface.

[0031] In some embodiments of this application, abnormal engine operating conditions after startup include: the engine control module outputting engine abnormality information or warning information during engine operation; the engine control module monitors the engine status through built-in monitoring logic or monitoring programs, and when the engine control module outputs abnormality information or warning information, it can be determined that the engine is in an abnormal operating condition. The abnormal information includes abnormal engine temperature, abnormal engine power reduction, abnormal fuel consumption, and abnormal oil consumption. The warning information includes engine warning information read through the human-machine interface. Alternatively, external sensors can be added to monitor abnormal engine sound, abnormal engine vibration, and abnormal engine exhaust color, but this requires additional material procurement costs and cannot be read through the engine ECM (engine control module), therefore it is not recommended here.

[0032] Abnormal engine operating conditions after startup may also include: one or more of the engine real-time status data read by the vehicle control program exceeding a set threshold. This solution is the preferred solution in this application. By modifying the electrical circuit and reading the engine real-time status data through the vehicle control program, an abnormal engine operating condition indication is generated when one or more of the engine real-time status data exceed the set threshold. This embodiment uses a method of identifying abnormal engine operating conditions by modifying the electrical circuit and reading the engine real-time status data through the vehicle control program, which can effectively avoid the problem of abnormal engine stalling during construction.

[0033] In one optional example, the real-time engine status data is selected as engine speed, engine coolant temperature, and engine torque, all of which can be read in real time by the vehicle controller via the communication bus. For example, the vehicle controller reads the engine speed as N1, the engine coolant temperature as T1, and the engine torque as F1 in real time via the communication bus. When N1>N2, T1>T2, and F1>F2 are simultaneously satisfied, the engine is determined to be in an abnormal operating condition, an abnormal operating condition indication is generated, and subsequent abnormal operating condition engine control logic is initiated. Here, N2, T2, and F2 are the set threshold values ​​corresponding to engine speed, engine coolant temperature, and engine torque, respectively. Preferably, these values ​​are obtained from the parameter setting interface of the human-machine interface via the communication bus, and different values ​​are set according to different engine brands and actual operating conditions.

[0034] In some optional embodiments of this application, the method further includes: restricting the working components in the vehicle after detecting that the engine is in an abnormal operating condition after startup. To protect the engine system of the excavator, the control logic of the vehicle control system can be set according to the specific working components in the engine system that need to be protected after detecting an abnormal operating condition. Restricting the working components in the vehicle includes taking one or more of the following measures: limiting the engine's operating speed to idle. The vehicle controller sends the idle speed to the engine ECM module via the communication bus, forcibly reducing the engine speed to idle. For example, sending a target speed command to the ECM immediately intervenes in the engine's torque and speed control, and by adjusting parameters such as the fuel injection quantity, forcibly reducing the actual operating speed of the engine and stabilizing it at the specified idle speed, thereby significantly reducing the available power of the hydraulic system from the power source end. Restricting the pilot solenoid valve of the vehicle controller to a low-level output to prohibit the excavator from performing any work. For example, the vehicle controller sets the drive output port of the pilot solenoid valve it controls to a low level (e.g., 0V). This pilot solenoid valve is typically used to control the on / off of the pilot oil circuit of the excavator's working devices (such as the boom and stick). A low-level output indicates that the solenoid valve is de-energized and closed, thus cutting off the pilot control oil pressure to each operating valve. This prevents the operating handle or remote control signal from driving the hydraulic main valve, prohibiting the excavator from performing any lifting, digging, or slewing operations at the hydraulic system execution level. Some interactive functions of the human-machine interface (HMI) are restricted; for example, the HMI in the cab is functionally limited. Except for necessary status displays and warnings related to idling stop, all other soft buttons and touch functions on the HMI that could trigger actions or mode switching are program-locked and ineffective. These measures are executed in concert and take effect simultaneously, collectively constituting a mandatory safe parking or system protection state, ensuring that the operating machinery completely stops working and enters a safe locked mode under specific conditions.

[0035] In some optional embodiments of this application, the method further includes: saving engine status data and outputting a shutdown delay prompt during the first timing period. Specifically, during the execution of the first timing operation, the normal power-down procedure of the engine is executed to ensure the integrity of the engine data and normal restart next time. The normal power-down procedure of the engine includes saving the engine's real-time status data to a non-volatile storage medium. During this period, a shutdown delay prompt box can also pop up on the human-machine interface to present the current status of the working machinery to the operator, allowing the operator to prepare accordingly.

[0036] Figure 2This illustration schematically depicts an implementation diagram of a machine shutdown delay control method according to an embodiment of this application. Taking an excavator as an example, due to the unpredictable nature of the excavator's real-time operating conditions—for instance, if the bucket suddenly hits a hard object during excavation, causing increased load—the engine will automatically reduce its speed and increase torque. However, if the load is still too large, it may cause the engine to shut down abnormally, resulting in an abnormal fault report that affects the next start-up. To address this situation, such as... Figure 2 As shown, this embodiment executes the following control logic, including the following steps: 1. The vehicle controller reads the engine speed N1 in real time via the communication bus; 2. The vehicle controller reads the engine coolant temperature T1 in real time via the communication bus; 3. The vehicle controller reads the engine torque F1 in real time via the communication bus; 4. Load Anomaly Judgment Conditions: When N1>N2, T1>T2, and F1>F2 are simultaneously satisfied, the engine is judged to be in an abnormal operating condition, and the abnormal operating condition engine control logic is activated. N2, T2, F2, t1, and t2 are parameters obtained by the vehicle controller from the parameter setting interface of the human-machine interface via the communication bus. Different parameters are set according to different engine brands and actual operating conditions; t1 represents the set duration of the engine shutdown delay, and t2 represents the set duration of the power failure delay. 5. The control logic of the vehicle control after detecting abnormal operating conditions is as follows: 5.1. The vehicle controller sends the idle speed to the engine ECM module through the communication bus to force the engine speed to idle; 5.2. The pilot solenoid valve output port of the vehicle controller is set to a low level to prevent the excavator from performing any work; 5.3. Other action outputs of the human-machine interface are restricted. 6. Since the operation is restricted in this condition during actual operation, the operator will usually turn the one-button start switch to the "OFF" position. Therefore, the power control logic for this process is as follows: 6.1 When an abnormal operating condition is detected, the DO2 port of the vehicle controller outputs a high level; 6.2 When the one-button start switch is turned to the "OFF" position, the DI1 of the vehicle controller will not receive a power-on signal, and the engine shutdown delay timer t3 will start. 6.3. Because the DO2 port of the vehicle controller outputs a high level to control the coil of the vehicle contactor, the normally open contacts of the vehicle contactor are still in the closed state, that is, the electrical components of the vehicle electrical system are powered normally. 6.4 During the engine shutdown delay timer cycle, the engine ECM saves real-time status data; 6.5 A prompt box for engine shutdown delay will pop up on the human-computer interaction interface; 6.6 After the engine shutdown delay time t3 > t1 is reached, the DO1 port of the vehicle controller outputs a high level, and the DO2 port stops outputting at the same time; the timer t4 begins. 6.7 At this time, the coil of the vehicle contactor is still energized, and the electrical components of the vehicle's electrical system are powered normally; 6.8 When the power-off delay timer t4 > t2, the DO1 port of the vehicle controller stops outputting high voltage, and the vehicle electrical system is powered off.

[0037] The above implementation methods achieve engine protection in the event of abnormal engine shutdown. This protection specifically manifests in the following ways: Turbocharger protection: Delayed shutdown allows the turbocharger to cool gradually after high-speed operation, preventing damage to the turbocharger bearings due to lack of lubrication caused by sudden shutdown. Engine temperature management: Allowing the cooling system to continue operating for a period of time helps high-temperature components cool down evenly, reducing thermal stress. Exhaust gas emission: Facilitates the complete removal of residual exhaust gases from the combustion chamber and exhaust system. Carbon deposit prevention: Prevents unburned fuel from forming carbon deposits on high-temperature components. Extended engine life: Through the above protective measures, the service life of critical engine components can be effectively extended.

[0038] Based on the same inventive concept, this application also provides a working machinery shutdown delay control circuit, the circuit including: a vehicle controller, a vehicle contactor and an intelligent power distribution box, the intelligent power distribution box including a relay for controlling the power supply of vehicle accessories; the vehicle controller is configured to execute the aforementioned working machinery shutdown delay control method; The vehicle controller receives the power-on signal from the keyless start switch via a low-voltage line, and receives real-time engine status data such as engine speed, torque, and coolant temperature from the engine ECM module via a communication bus. It also receives preset parameters from the human-machine interface via the bus, including engine speed, torque, coolant temperature, engine shutdown delay time, and power-off delay time. The controller executes the engine shutdown delay control method and outputs the algorithm results to the power distribution line in the form of power-off delay signals and engine shutdown delay signals to control the power supply logic of electrical components. The intelligent power distribution box receives the power-on signal from the keyless start switch and converts the vehicle's constant power supply into the ACC power-on signal for the vehicle's electrical system via a relay.

[0039] Figure 3 The diagram illustrates the structure of a machine shutdown delay control circuit according to an embodiment of this application. Figure 3As shown in the diagram, three types of power supplies are illustrated: Vehicle constant power supply: the power source from the positive terminal of the battery and passing through the vehicle fuse F1. Vehicle control power supply: the power source from the vehicle constant power supply passing through the positive terminal of the normally open contact of the vehicle contactor and exiting from the negative terminal of the contactor. This power supply is controlled by the vehicle contactor; when there is 24VDC voltage at the positive terminal of the control coil of the vehicle contactor, the normally open contact closes and conducts. Vehicle ACC power supply: the power source from the vehicle constant power supply passing through the normally open contact of the relay in the intelligent power distribution box, controlled by the power-on signal from the one-button start switch via the relay coil wire number in the intelligent power distribution box. The first pin DO1 of the vehicle controller is connected to the control terminal of the vehicle contactor. The normally open contacts of the vehicle contactor are connected to both the vehicle constant power supply and the vehicle electrical system, and in the energized state, they connect the vehicle constant power supply and the vehicle electrical system. The second pin DO2 of the vehicle controller is connected to the control terminal of the vehicle contactor and the control terminal of the relay in the intelligent power distribution box; the normally open contact of the relay controlling the vehicle accessory power supply is connected to the vehicle accessory power supply and the vehicle electrical system respectively, and connects the vehicle ACC power supply and the vehicle electrical system when energized.

[0040] In some alternative implementations, such as Figure 3 As shown, the circuit also includes a battery that provides power to the vehicle's electrical system. A main power switch is installed at the negative terminal of the battery and is manually disconnected when the excavator stops working to reduce battery discharge. A vehicle contactor controls the supply of the aforementioned vehicle control power. The circuit also includes several fuses. Fuse F1 protects the vehicle's electrical system, while fuses F2, F3, F4, and F5 protect electrical components such as the one-button start switch, vehicle controller, engine ECM, and human-machine interface, ensuring their reliable operation. Furthermore, F2, F3, F4, and F5 are integrated in the distribution box. When a fuse blows due to excessive current, the distribution box sends the fuse blown information to the human-machine interface via the communication bus, displaying the information and reminding the operator to replace the fuse. The circuit also includes a diode D, which acts as a unidirectional conductor, ensuring that the low-voltage signal flows in the required direction and preventing backflow that could impact the internal circuitry of the vehicle controller's output port.

[0041] In some optional embodiments, the circuit further includes a start switch, which is communicatively coupled to at least one pin of the vehicle controller. The start switch is used to generate a start-stop control signal for the vehicle based on its own state determined by user operation. This start-stop control signal includes: 1. energizing and de-energizing the vehicle's electrical system, with the engine stopping after the vehicle's electrical system is de-energized; 2. controlling the engine start-stop signal. The de-energizing signal in the start-stop control signal is the aforementioned engine shutdown signal. The start switch here... Figure 3The symbol in the middle is a one-button start switch. This one-button start switch is used to power on and off the vehicle's electrical system. The one-button start switch integrates an engine start button, a red indicator light, and a green indicator light, forming an integrated electrical control component. When the one-button start switch is powered on, the red indicator light illuminates to indicate that the engine is not started; pressing the middle button on the one-button start switch starts the engine. Once the engine starts, the green indicator light illuminates, and the red indicator light turns off. The steps for powering on the vehicle's electrical system and starting the engine based on this one-button start switch are as follows: 1. Close the main power switch to supply power to the vehicle's electrical system; 2. Turn the one-button start switch to the "ON" position to the right; 3. When the power-on signal enters the relay of the intelligent power distribution box, the normally open contact of the relay coil is closed after being energized, thus obtaining the ACC power for the whole vehicle. 4. The ACC power supply enters the coil of the vehicle contactor after passing through the diode. After the coil is energized, the normally open contacts of the vehicle contactor close to obtain the vehicle control power supply, the vehicle electrical system is energized, and the electrical components work normally. 5. When the power-on signal of the one-button start switch enters the DI1 port of the vehicle controller, the vehicle controller records that the vehicle electrical system has been powered on. 6. When the vehicle controller output port DO3 outputs a high level to the one-button start switch, the red indicator light will illuminate, indicating that the engine has not started. 7. Press the one-button start / stop switch button, and the DI2 port of the vehicle controller will receive the engine start signal; 8. The vehicle controller outputs the results of logic operations to the engine ECM module, which then controls the starter motor to start the engine. When the vehicle controller reads the engine speed signal through the communication bus, it outputs a high level through the DO4 port to illuminate the green indicator light of the one-button start switch, indicating that the engine has started. At the same time, the DO3 port stops outputting, and the red indicator light of the one-button start switch goes out. 9. At this time, you can check the engine speed, coolant temperature, output torque, generator voltage and other information through the status display interface of the human-machine interface.

[0042] In some optional embodiments, the circuit further includes an engine control module (ECM); the engine ECM is connected to the communication bus and communicates with other devices connected to the same communication bus; the engine ECM draws power from the vehicle's constant power supply and from the vehicle's electrical system. The engine ECM module sends engine status information, such as engine speed, torque, and coolant temperature, through the communication bus, and simultaneously receives engine key electrical signals through electrical circuits to ensure normal operation of the engine ECM module. Optionally, the circuit also includes an engine emergency stop switch for emergency engine stop control in case of emergency, ensuring safe production at the construction site.

[0043] In some optional embodiments, the circuit further includes a human-machine interface for displaying vehicle electrical system status data, parameter settings, and fault alarms; the human-machine interface is connected to the communication bus and communicates with other devices connected to the same communication bus; the human-machine interface is powered by the vehicle's constant power supply.

[0044] This application also provides a work machine, wherein at least one processor of the work machine is configured to execute the aforementioned work machine shutdown delay control method, or the work machine includes the aforementioned work machine shutdown delay control circuit. The work machine is preferably an excavator, and more suitable for ultra-large excavators, providing effective protection for the engine in abnormal shutdown scenarios of ultra-large machinery.

[0045] In some embodiments of this application, an electronic device is also provided, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the at least one processor executes the aforementioned machine shutdown delay control method. Its internal structure diagram can be shown as follows. Figure 4 As shown. Figure 4The diagram schematically illustrates the internal structure of an electronic device according to an embodiment of this application. The electronic device includes a processor A01, a network interface A02, a memory (not shown), and a database (not shown) connected via a system bus. The processor A01 provides computing and control capabilities. The memory includes internal memory A03 and a non-volatile storage medium A04. The non-volatile storage medium A04 stores an operating system B01, a computer program B02, and a database (not shown). The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 stored in the non-volatile storage medium A04. The network interface A02 is used for communication with external terminals via a network connection. When the computer program B02 is executed by the processor A01, it implements a method for controlling the shutdown delay of operating machinery.

[0046] Those skilled in the art will understand that Figure 4 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the electronic device to which the present application is applied. The specific electronic device may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0047] In one embodiment provided in this application, a machine-readable storage medium is provided, on which instructions are stored, which, when executed by a processor, cause the processor to be configured to perform the aforementioned machine shutdown delay control method.

[0048] In one embodiment provided in this application, a computer program product is provided, including a computer program that, when executed by a processor, implements the aforementioned method for controlling the shutdown delay of operating machinery.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0054] 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.

[0055] 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 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.

[0056] 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.

[0057] 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 controlling the shutdown delay of operating machinery, characterized in that, The method includes: When an abnormal operating condition is detected in the engine after startup, a first level is generated to maintain the energization of the vehicle contactors and relays, the relays being used to control the power supply of vehicle accessories; If an engine shutdown signal is received during the duration of the first level, the first timing begins; After the first timing reaches the first preset duration, the generation of the first level stops, and a second level is generated to maintain the energized state of the vehicle contactor, while the second timing starts. After the second timing reaches the second preset duration, the generation of the second level stops.

2. The method according to claim 1, characterized in that, The engine is started by the following steps: After the main power switch is closed, the vehicle's electrical system is in a state of constant power supply. When the intelligent power distribution box relay used to control the power supply status of vehicle accessories receives a power-on signal, the relay used to control the power supply status of vehicle accessories is energized. The vehicle contactor receives power from the vehicle accessories and enters the energized state. When the vehicle controller receives the engine start signal, it triggers the engine control module to control the starter motor to start the engine.

3. The method according to claim 1, characterized in that, Abnormal operating conditions of the engine after startup include: One or more of the engine real-time status data read by the vehicle control program exceed a set threshold; or The engine control module outputs abnormal or warning information during engine operation.

4. The method according to claim 1, characterized in that, The method further includes: restricting the working parts of the vehicle when an abnormal operating condition is detected in the started engine; The restriction on the working parts in the vehicle includes: Limit the engine speed to idle. The pilot solenoid valve of the vehicle controller is restricted to a low-level output; Restrict some interactive functions of the human-computer interaction interface.

5. The method according to claim 1, characterized in that, The method further includes: saving engine status data during the first timing period and outputting a shutdown delay prompt.

6. A shutdown delay control circuit for operating machinery, characterized in that, The circuit includes: a vehicle controller, a vehicle contactor, and a smart power distribution box, wherein the smart power distribution box includes relays for controlling the power supply of vehicle accessories; The vehicle controller is configured to execute the work machinery shutdown delay control method according to any one of claims 1 to 5; The first pin of the vehicle controller is connected to the control terminal of the vehicle contactor, and the normally open contacts of the vehicle contactor are connected to the vehicle's constant power supply and the vehicle's electrical system, respectively. The second pin of the vehicle controller is connected to the control terminal of the vehicle contactor and the control terminal of the relay that controls the power supply of vehicle accessories; the normally open contacts of the relay that controls the power supply of vehicle accessories are connected to the power supply of vehicle accessories and the vehicle electrical system, respectively.

7. The circuit according to claim 6, characterized in that, The circuit also includes an engine control module for the engine; The engine control module of the engine is connected to the communication bus; The engine control module draws power from the vehicle's constant power supply and from the vehicle's electrical system.

8. The circuit according to claim 6, characterized in that, The circuit also includes a human-computer interaction interface; The human-computer interaction interface is connected to the communication bus; The human-machine interface is powered by the vehicle's constant power supply.

9. A type of operating machinery, characterized in that, At least one processor of the operating machine is configured to execute the operating machine shutdown delay control method according to any one of claims 1 to 5, or the operating machine includes the operating machine shutdown delay control circuit according to any one of claims 6 to 8.

10. A computer-readable storage medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instruction is executed by the processor, it implements the machine shutdown delay control method according to any one of claims 1 to 5.

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