Control method and device for work machine, work machine, and storage medium

Abstract

The invention discloses a control method and device for an operation machine, the operation machine and a storage medium, and belongs to the field of engineering machines. The operation machine comprises a hydraulic system and an engine, and the control method comprises the steps that under the condition that an engine flameout signal is received, the current hydraulic oil temperature of the hydraulic system and the current cooling liquid temperature of the engine at the current moment are obtained; according to the current hydraulic oil temperature and the current cooling liquid temperature, the current load state of the operation machine is determined; determining a target flameout delay duration according to the current load state; and controlling the engine to stop according to the target stop delay duration. The heat dissipation efficiency of the operation machine can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of working machine control, and specifically to a control method and device for a working machine, a working machine, and a storage medium. Background Art

[0002] At the infrastructure construction site, after a long period of continuous operation, the operating machinery needs to be shut down to suspend the operation, so as to avoid the failure of the internal system of the operating machinery caused by long-term high-temperature operation. The prior art performs delay control on the shutdown of the operating machinery. After the shutdown switch is turned off, the operating machinery is controlled to shut down based on the fixed shutdown delay time. However, using a fixed shutdown delay time to control the engine shutdown may lead to insufficient heat dissipation or too long heat dissipation time, which may affect the performance of the operating machinery. Therefore, the prior art has the problem of low heat dissipation efficiency. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a control method and device for an operating machine, an operating machine and a storage medium, so as to solve the problem of low heat dissipation efficiency in the prior art.

[0004] In order to achieve the above-mentioned object, the first aspect of the present application provides a control method for a working machine, the working machine comprising a hydraulic system and an engine, the control method comprising:

[0005] When receiving the engine shutdown signal, obtaining the current hydraulic oil temperature of the hydraulic system and the current coolant temperature of the engine at the current moment;

[0006] Determine the current load state of the operating machine according to the current hydraulic oil temperature and the current coolant temperature;

[0007] Determine the target flameout delay time according to the current load status;

[0008] The engine is shut down according to the target shutdown delay time.

[0009] In an embodiment of the present application, a target flameout delay duration is determined according to a current load state, including: obtaining the current ambient temperature of the environment in which the operating machine is located; determining a target preset delay duration corresponding to the current load state based on a pre-stored correspondence between the load state and the delay duration; and determining a target flameout delay duration according to the current ambient temperature and the target preset delay duration.

[0010] In an embodiment of the present application, a target ignition delay duration is determined based on the current ambient temperature and the target preset delay duration, including: determining the target ambient temperature coefficient corresponding to the current ambient temperature based on a pre-stored correspondence between the ambient temperature and the ambient temperature coefficient; determining the target ignition delay duration based on the target preset delay duration and the target ambient temperature coefficient.

[0011] In an embodiment of the present application, a target flameout delay duration is determined according to a target preset delay duration and a target ambient temperature coefficient, including: determining the product value of the target preset delay duration and the target ambient temperature coefficient to obtain the target flameout delay duration.

[0012] In an embodiment of the present application, determining a target ignition delay duration according to a current load state includes: determining that the current load state is a low load state; and determining a preset delay duration corresponding to the low load state as the target ignition delay duration.

[0013] In an embodiment of the present application, a target flameout delay duration is determined according to a current load state, including: determining that the current load state is a medium load state or a high load state; controlling the engine speed to be reduced to a preset idle speed and not responding to an operating signal of an operating mechanism of the working machine to reduce the load of the working machine; when the current load state is a low load state, determining a preset delay duration corresponding to the low load state as the target flameout delay duration.

[0014] In an embodiment of the present application, the current load state of the operating machinery is determined based on the current hydraulic oil temperature and the current coolant temperature, including: when the current hydraulic oil temperature and / or the current coolant temperature is greater than or equal to the corresponding first temperature threshold, the current load state of the operating machinery is determined to be a high load state; when the current hydraulic oil temperature and the current coolant temperature are less than the corresponding second temperature threshold, the current load state of the operating machinery is determined to be a low load state; when the current hydraulic oil temperature and the current coolant temperature are less than the corresponding first temperature threshold, and the current hydraulic oil temperature and / or the current coolant temperature is greater than or equal to the corresponding second temperature threshold, the current load state of the operating machinery is determined to be a medium load state; wherein the first temperature threshold is greater than the second temperature threshold.

[0015] In an embodiment of the present application, the control method further includes: upon receiving an engine shutdown signal, controlling the engine speed to decrease to a preset idle speed and / or not responding to an operating signal of a control mechanism of the working machine.

[0016] A second aspect of the present application provides a control device for a working machine, comprising: a memory configured to store instructions; and a processor configured to call the instructions from the above-mentioned memory and to implement the above-mentioned control method for the working machine when executing the instructions.

[0017] A third aspect of the present application provides a working machine, comprising: an engine; a hydraulic system; and a control device for the working machine according to the above.

[0018] A fourth aspect of the present application provides a machine-readable storage medium having instructions stored thereon, the instructions being used to enable a machine to execute the control method for a working machine according to the above-mentioned method.

[0019] The above technical solution, when receiving the engine flameout signal, can determine the current load state of the working machine by obtaining the current hydraulic oil temperature of the hydraulic system and the current coolant temperature of the engine at the current moment, so that the target flameout delay time can be determined according to the current load state, and further, the engine flameout can be controlled according to the target flameout delay time. Thus, the current load state of the working machine is determined according to the current hydraulic oil temperature and the current coolant temperature, and the current load state of the working machine is taken into consideration. The target flameout delay time is determined based on the current load state of the working machine, and the corresponding target flameout delay time can be determined according to the actual workload of the working machine. The engine flameout is controlled according to the target flameout delay time. Compared with the prior art in which the engine flameout is controlled according to a fixed flameout delay time, the flexibility of setting the flameout delay time is improved, and the occurrence of low-load high-delay conditions or high-load low-delay conditions is avoided, and sufficient heat dissipation can be achieved, which effectively reduces unnecessary energy consumption and improves the heat dissipation efficiency of the working machine.

[0020] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0022] Figure 1 A schematic diagram of a flow chart of a control method for a working machine according to an embodiment of the present application is schematically shown;

[0023] Figure 2 A schematic diagram of a flow chart of a control method for a working machine according to an embodiment of the present application is schematically shown;

[0024] Figure 3 A schematic diagram of a flow chart of another control method for a working machine according to an embodiment of the present application is shown;

[0025] Figure 4 A schematic diagram schematically shows a structural block diagram of a working machine according to an embodiment of the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application, and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] It should be noted that the acquisition, transmission, storage, use, and processing of data in the technical solution of this application are in compliance with the relevant provisions of national laws and regulations. In the embodiments of this application, some existing solutions in the industry such as certain software, components, and models may be mentioned, which should be considered as exemplary. Their purpose is only to illustrate the feasibility of implementing the technical solution of this application, but it does not mean that the applicant has or will necessarily use the solution.

[0028] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0030] Figure 1 The flowchart of a method for controlling a working machine according to an embodiment of the present application is schematically shown. Figure 1 As shown, an embodiment of the present application provides a control method for a working machine, and the control method may include:

[0031] Step S101, when an engine shutdown signal is received, the current hydraulic oil temperature of the hydraulic system and the current coolant temperature of the engine are obtained.

[0032] Step S102, determining the current load state of the working machine according to the current hydraulic oil temperature and the current coolant temperature.

[0033] Step S103, determining a target ignition-off delay time according to the current load state.

[0034] Step S104, controlling the engine to shut down according to the target shutdown delay time.

[0035] It can be understood that the working machinery may include mechanical equipment such as excavators and pump trucks. The engine shutdown signal may be a signal for controlling the engine shutdown, which may be triggered by, for example, the user turning off the engine shutdown switch. The hydraulic oil temperature is the temperature of the hydraulic oil in the hydraulic system, and the current hydraulic oil temperature is the temperature of the hydraulic oil in the hydraulic system at the current moment. The coolant temperature is the temperature of the coolant inside the engine, and the current coolant temperature is the temperature of the coolant inside the engine at the current moment. The load state may characterize the working load of the working machinery, and the load state may be divided into a plurality of different levels of load states, and the current load state is the load state of the working machinery at the current moment. The target shutdown delay duration is the target duration for delaying the control of the engine shutdown. Controlling the engine shutdown may include controlling the engine speed to be reduced to 0. Further, in some embodiments, when the engine speed is reduced to 0, the power relay may be controlled to be closed so that the power of the entire working machinery is turned off.

[0036] Specifically, if the user turns off the engine flameout switch, the processor can receive the engine flameout signal, and after receiving the engine flameout signal, in response to the engine flameout signal, the hydraulic oil temperature and the coolant temperature can be obtained in real time through the temperature sensor set on the hydraulic system and the temperature sensor or other temperature detection device set on the engine, so as to obtain the current hydraulic oil temperature and the current coolant temperature. Further, the processor can jointly determine the current load state of the operating machine according to the different temperature conditions of the current hydraulic oil temperature and the current coolant temperature. The target flameout delay time is different for different load states. The processor can determine the target flameout delay time according to the current load state. For example, the processor can determine the target flameout delay time corresponding to the current load state according to the corresponding relationship between the pre-stored load state and the flameout delay time. It can be understood that the higher the load, the longer the flameout delay time, and the lower the load, the shorter the flameout delay time. After reaching the target flameout delay time, the processor can control the engine to flameout.

[0037] In the case of receiving the engine flameout signal, the current load state of the working machine can be determined by obtaining the current hydraulic oil temperature of the hydraulic system and the current coolant temperature of the engine at the current moment, so that the target flameout delay time can be determined according to the current load state, and further, the engine flameout can be controlled according to the target flameout delay time. Therefore, the current load state of the working machine is determined according to the current hydraulic oil temperature and the current coolant temperature, and the current load state of the working machine is taken into consideration. The target flameout delay time is determined based on the current load state of the working machine, and the corresponding target flameout delay time can be determined according to the actual workload of the working machine. The engine flameout is controlled according to the target flameout delay time. Compared with the prior art in which the engine flameout is controlled according to a fixed flameout delay time, the flexibility of setting the flameout delay time is improved, and the occurrence of low-load high-delay conditions or high-load low-delay conditions is avoided, and sufficient heat dissipation can be achieved, which effectively reduces unnecessary energy consumption and improves the heat dissipation efficiency of the working machine.

[0038] In one embodiment, a target flameout delay duration is determined according to a current load state, including: obtaining the current ambient temperature of the environment in which the operating machine is located; determining a target preset delay duration corresponding to the current load state based on a pre-stored correspondence between the load state and the delay duration; and determining a target flameout delay duration according to the current ambient temperature and the target preset delay duration.

[0039] It can be understood that the ambient temperature is the temperature of the environment in which the operating machine is located. If the environment in which the operating machine is located is an indoor / outdoor environment, then the ambient temperature is the temperature of the indoor / outdoor environment, and the current ambient temperature is the temperature of the environment in which the operating machine is located at the current moment. The correspondence between the pre-stored load state and the delay time is the correspondence between the pre-stored load state and the delay time. The types of load states can be multiple, and the number of delay times can be multiple. Each load state can correspond to a delay time. The higher the load, the longer the extension time. The preset delay time is a preset or pre-stored delay time, and the target preset delay time is a delay time in the preset delay time.

[0040] Specifically, the operating machine may also include a heat dissipation system. The processor may obtain the current ambient temperature of the operating machine's environment at the current moment through a temperature sensor or other temperature determination device set in the operating machine's environment, and may estimate the heat dissipation of the operating machine in the environment. Specifically, it may determine whether the operating machine's environment will cause the operating machine to dissipate heat. If the ambient temperature will prevent the operating machine from dissipating heat (for example, the ambient temperature is too high), the target preset delay time is appropriately extended to the target flameout delay time; on the contrary, if the ambient temperature will cause the operating machine to dissipate heat (for example, the ambient temperature is too low), the target preset delay time is appropriately shortened to the target flameout delay time; and if the ambient temperature cannot cause or prevent the operating machine from dissipating heat (the ambient temperature is neither too high nor too low), the target preset delay time may be maintained as the target flameout delay time. In the correspondence between the pre-stored load state and the delay time, the target preset delay time required for the current load state is determined, and the target flameout delay time of the operating machine can be determined by the current ambient temperature and the target preset delay time.

[0041] Therefore, combined with the operating machinery's own state factors (the operating machinery's current load state) and external environmental factors (the ambient temperature of the operating machinery's environment), the target flameout delay time required for the operating machinery is determined based on internal and external factors, thereby ensuring that the cooling fan inside the operating machinery has enough time to stop running, avoiding various problems caused by high temperature in the cooling system, thereby optimizing the heat dissipation efficiency of the operating machinery, improving the operating machinery's adaptability to various operating environment conditions, and improving the flexibility of the target flameout delay time.

[0042] In one embodiment, a target ignition delay time is determined based on the current ambient temperature and the target preset delay time, including: determining the target ambient temperature coefficient corresponding to the current ambient temperature based on a pre-stored correspondence between the ambient temperature and the ambient temperature coefficient; determining the target ignition delay time based on the target preset delay time and the target ambient temperature coefficient.

[0043] It can be understood that the correspondence between the pre-stored ambient temperature and the ambient temperature coefficient can be a correspondence between the pre-stored ambient temperature and the ambient temperature coefficient, each ambient temperature corresponds to an ambient temperature coefficient, and the ambient temperature coefficient is used to characterize the heat dissipation promotion of the operating machinery under the current ambient temperature. The target ambient temperature coefficient is the ambient temperature coefficient corresponding to the current ambient temperature.

[0044] Specifically, the target ambient temperature coefficient corresponding to the current ambient temperature can be found through the correspondence between the pre-stored ambient temperature and the ambient temperature coefficient, so as to determine the target flameout delay time through the target preset delay time and the target ambient temperature coefficient. As a result, the processor can flexibly adjust the target preset delay time based on the current ambient temperature of the operating machine to determine the target flameout delay time, which improves the flexibility of setting the target flameout delay time, helps to reduce the energy consumption of the operating machine, improves the energy-saving effect, and optimizes the heat dissipation efficiency of the operating machine.

[0045] In one embodiment, determining a target flameout delay duration according to a target preset delay duration and a target ambient temperature coefficient includes: determining a product value of the target preset delay duration and the target ambient temperature coefficient to obtain a target flameout delay duration.

[0046] Specifically, the processor can calculate the product value of the target preset delay time and the target ambient temperature coefficient to obtain the target flameout delay time. If the ambient temperature is lower than the first ambient temperature threshold, the ambient temperature is a low ambient temperature, which can prompt the operating machine to dissipate heat, and the target preset delay time can be appropriately shortened. The ambient temperature coefficient corresponding to the low ambient temperature can be a coefficient greater than 0 and less than 1; and if the ambient temperature is greater than or equal to the first ambient temperature threshold and less than the second ambient temperature threshold, it can be determined that the ambient temperature cannot prompt or prevent the operating machine from dissipating heat, and the target preset delay time can be maintained, and the ambient temperature coefficient can be set to 1; similarly, if the ambient temperature is greater than the second ambient temperature threshold, it is determined that the ambient temperature can prevent the operating machine from dissipating heat, and the target preset delay time can be appropriately extended, and the ambient temperature coefficient can be set to a coefficient greater than 1, wherein the first ambient temperature threshold is less than the second ambient temperature threshold. Determine the ambient temperature coefficient corresponding to the current ambient temperature, and further, calculate the product value of the ambient temperature coefficient and the target preset delay time, and use the product value as the target flameout delay time.

[0047] In addition, if Figure 2As shown, the target preset delay time may include a low load delay time corresponding to a low load state (low load delay time), a medium load delay time corresponding to a medium load state (medium load delay time), and a high load delay time corresponding to a high load state (high load delay time). Based on this, the processor may calculate the quotient of the target preset delay time and the target ambient temperature coefficient to obtain the target flameout delay time. If the ambient temperature is lower than the first ambient temperature threshold, the ambient temperature is low ambient temperature, which can prompt the operating machinery to dissipate heat, and the target preset delay time can be appropriately shortened. The ambient temperature coefficient corresponding to the low ambient temperature can be a coefficient greater than 1; if the ambient temperature is greater than or equal to the first ambient temperature threshold and less than the second ambient temperature threshold, the ambient temperature is normal ambient temperature, and it can be determined that the ambient temperature cannot prompt or prevent the operating machinery from dissipating heat, and the target preset delay time can be maintained, and the ambient temperature coefficient corresponding to the normal ambient temperature can be set to 1; similarly, if the ambient temperature is greater than or equal to the second ambient temperature threshold, the ambient temperature is high ambient temperature, and the high ambient temperature can prevent the operating machinery from dissipating heat, and the target preset delay time can be appropriately extended. The ambient temperature coefficient corresponding to the high ambient temperature can be set to a coefficient greater than 0 and less than 1, wherein the first ambient temperature threshold is less than the second ambient temperature threshold. Determine the ambient temperature coefficient corresponding to the current ambient temperature, and further, calculate the quotient of the ambient temperature coefficient and the target preset delay time, and use the quotient as the target flameout delay time. When the target flameout delay time is reached, the emergency stop switch is triggered, or the user forcibly shuts down the vehicle (for example, the user forces the flameout), the flameout relay can be controlled to work, thereby controlling the engine to shut down (that is, the engine speed is 0), and then, the delay timing function of the power relay is turned on. After the power-off delay time is reached, the power relay is turned off and the power of the entire vehicle is turned off.

[0048] The processor calculates the product value (or quotient value) of the ambient temperature coefficient and the target preset delay time, which can improve the calculation accuracy of the target shutdown delay time, thereby clarifying the delay time for controlling the shutdown of the operating machinery.

[0049] In one embodiment, determining a target flameout delay duration according to a current load state includes: determining that the current load state is a low load state; and determining a preset delay duration corresponding to the low load state as the target flameout delay duration.

[0050] It can be understood that the load state can include a low load state, and the low load state can indicate that the workload of the operating machine is small. The preset delay time length can be a preset delay time length, and the preset delay time length is a delay time length for the low load state.

[0051] Specifically, if the current load state is a low load state, it can be determined that the working load of the operating machinery before the user turns off the key switch is small. After determining the preset delay time corresponding to the low load state (for example, 3 minutes), the processor sets the preset delay time as the target flameout delay time. The target flameout delay time can be displayed with a corresponding countdown in the central control instrument panel. When the target flameout delay time counts down to 0, the flameout relay is controlled to work, thereby shutting down the engine of the operating machinery.

[0052] In one embodiment, a target flameout delay duration is determined based on a current load state, including: determining that the current load state is a medium load state or a high load state; controlling the engine speed to be reduced to a preset idle speed and not responding to an operating signal of an operating mechanism of the working machine to reduce the load of the working machine; when the current load state is a low load state, determining a preset delay duration corresponding to the low load state as the target flameout delay duration.

[0053] It can be understood that the load state can also include a medium load state and a high load state. The medium load state can indicate that the workload of the working machine is moderate, and the high load state can indicate that the workload of the working machine is heavy. The preset idle speed is the preset minimum stable speed of the engine. When the engine is running at the minimum stable speed, only the basic operation of the working machine is maintained to drive the accessory system of the vehicle. The operating signal of the operating mechanism of the working machine refers to the operating signal generated by the user controlling the operating mechanisms of the working machine, that is, to close the pilot solenoid valve and not respond to the handle action of the working machine.

[0054] Specifically, the load state of the operating machine is switched from a low load state to a medium load state or from a medium load state to a high load state. Since the engine or cooling system in the operating machine can quickly respond to the change of the load state, the state can be switched directly without waiting for the delay switch. However, when the load state of the operating machine is switched from a high load state to a medium load state or from a medium load state to a low load state, the sudden load reduction may cause the temperature of the cooling system to be too high, so a certain delay is required to ensure that the cooling system can safely reduce the temperature to avoid damage caused by excessive temperature. In a specific embodiment, when the operating state of the operating machine is a low load state, it can be understood that the low load state waits for the target flameout delay time to control the engine to shut down and does not affect the service life of the engine. Therefore, when the operating state of the operating machine is a low load state, the engine is controlled to shut down after reaching the target flameout delay time. If the operating state of the operating machine is a medium or high load state, it can wait for its load state to switch to a low load state, and then wait for it to reach the corresponding target flameout delay time to control the engine to shut down. In this way, by waiting for its load state to switch to a low-load state, it can be determined that the operating machinery has sufficiently dissipated heat at this time. After reaching the target shutdown delay time, the engine is controlled to shut down, which can allow the operating machinery to fully dissipate heat and reduce the impact of high temperature on the various structural performances of the operating machinery during the shutdown process.

[0055] like Figure 3 As shown, if the processor determines that the load state of the working machine at the current moment is a high load state based on the hydraulic oil temperature and coolant temperature obtained in real time, the engine speed is controlled to be reduced to a preset idle speed and not respond to the operation signal of the operating mechanism of the working machine, which can reduce the load of the working machine and is conducive to improving the heat dissipation efficiency of the working machine. If it is determined that the hydraulic oil temperature and the coolant temperature continue to meet the medium load state within the preset detection time, the high load state of the working machine at the current moment is switched to the medium load state. At this time, the engine speed maintains the preset idle speed, does not respond to the operation signal of the operating mechanism of the working machine, continues to obtain the hydraulic oil temperature and the coolant temperature in real time, and when it is determined that the hydraulic oil temperature and the coolant temperature continue to meet the low load state within the preset detection time, the medium load state of the working machine at the current moment is switched to the low load state. Further, the preset delay time corresponding to the low load state is determined as the target flameout delay time, and after reaching the target flameout delay time, the engine is controlled to flameout.

[0056] If the processor determines that the load state of the operating machine at the current moment is a medium load state based on the hydraulic oil temperature and coolant temperature obtained in real time, the engine speed is controlled to be reduced to a preset idle speed and does not respond to the operation signal of the operating mechanism of the operating machine, which can reduce the load of the operating machine and is beneficial to improving the heat dissipation efficiency of the operating machine. If it is determined that the hydraulic oil temperature and the coolant temperature continue to meet the low load state within the preset detection time, the medium load state of the operating machine at the current moment is switched to a low load state. Furthermore, the preset delay time corresponding to the low load state is determined as the target flameout delay time. After reaching the target flameout delay time, the engine is controlled to be flameout.

[0057] If the processor determines that the load state of the operating machinery at the current moment is a low load state based on the real-time acquired hydraulic oil temperature and coolant temperature, the preset delay time corresponding to the low load state is determined as the target flameout delay time. After reaching the target flameout delay time, the engine is controlled to be flameout.

[0058] In one embodiment, the current load state of the operating machinery is determined based on the current hydraulic oil temperature and the current coolant temperature, including: when the current hydraulic oil temperature and / or the current coolant temperature is greater than or equal to the corresponding first temperature threshold, the current load state of the operating machinery is determined to be a high load state; when the current hydraulic oil temperature and the current coolant temperature are less than the corresponding second temperature threshold, the current load state of the operating machinery is determined to be a low load state; when the current hydraulic oil temperature and the current coolant temperature are less than the corresponding first temperature threshold, and the current hydraulic oil temperature and / or the current coolant temperature is greater than or equal to the corresponding second temperature threshold, the current load state of the operating machinery is determined to be a medium load state; wherein the first temperature threshold is greater than the second temperature threshold.

[0059] It can be understood that the first temperature threshold and the second temperature threshold can be preset by the user, and the first temperature threshold is greater than the second temperature threshold. The number of the first temperature threshold is two, and the number of the second temperature threshold is two. The first temperature threshold corresponding to the hydraulic oil temperature and the first temperature threshold corresponding to the coolant temperature can be the same or different. Similarly, the second temperature threshold corresponding to the hydraulic oil temperature and the second temperature threshold corresponding to the coolant temperature can be the same or different.

[0060] Specifically, when the current hydraulic oil temperature and / or the current coolant temperature is greater than or equal to the corresponding first temperature threshold, the current load state of the operating machine is determined to be a high load state, that is, as long as it is determined that any one of the current hydraulic oil temperature or the current coolant temperature is greater than or equal to the corresponding first temperature threshold, the current load state of the operating machine can be determined to be a high load state. When the current hydraulic oil temperature and the current coolant temperature are less than the corresponding second temperature threshold, the current load state of the operating machine is determined to be a low load state, that is, it is necessary to determine that the current hydraulic oil temperature and the current coolant temperature are both less than the corresponding second temperature threshold, so that the current load state of the operating machine can be determined to be a low load state. When the current hydraulic oil temperature and the current coolant temperature are less than the corresponding first temperature threshold, and the current hydraulic oil temperature and / or the current coolant temperature are greater than or equal to the corresponding second temperature threshold, the current load state of the operating machine is determined to be a medium load state, that is, as long as it is determined that any one of the current hydraulic oil temperature or the current coolant temperature is greater than or equal to the corresponding second temperature threshold and less than the corresponding first temperature threshold, the current load state of the operating machine can be determined to be a medium load state.

[0061] It can be seen from this that by comparing the current hydraulic oil temperature and the current coolant temperature with their corresponding first threshold and second threshold, the load state of the operating machine at the current moment can be accurately judged, the operating machine's own state can be clarified, and the target flameout delay time corresponding to the load state can be determined, thereby improving its heat dissipation efficiency.

[0062] In one embodiment, the control method further comprises: when an engine shutdown signal is received, controlling the engine speed to decrease to a preset idle speed and / or not responding to an operation signal of a control mechanism of the working machine.

[0063] Specifically, Figure 4As shown, the processor (i.e., controller) corresponding to the operating machine turns on the power switch, the power relay works, the operating machine is powered on, the start switch is turned on, and the whole machine start signal is sent. Correspondingly, if the start switch is not turned on, the whole machine start signal cannot be sent. If the emergency stop switch is turned on, the emergency stop signal can be sent to the engine and the processor (i.e., controller). Similarly, if the key switch is turned off, the shutdown signal is sent to the engine and the processor (i.e., controller) to generate an engine shutdown signal. After the operating machine receives the shutdown signal, the engine speed monitored by the speed sensor is reduced to a preset idle speed and / or does not respond to the operation signal of the operating mechanism of the operating machine (closes the pilot solenoid valve and does not respond to the handle action of the operating machine), obtains the ambient temperature of the operating machine's environment, determines the target shutdown delay time, displays the current load state in the display, and performs a shutdown countdown. During the shutdown countdown, the display can also prompt the forced shutdown content, and the operator can force the engine to shut down by pressing the forced stop button. During the shutdown countdown, if the emergency stop switch is triggered, the engine can be directly shut down, and the display can prompt the emergency stop related content. After the flameout countdown ends (the moment the flameout countdown reaches 0), the flameout relay works to control the engine to shut down (that is, the engine speed is 0), and then the processor (that is, the controller) turns on the delay timing function of the power relay. After the power-off delay time is reached, the power relay is turned off and the power of the entire vehicle is turned off.

[0064] At present, a flameout control method for operating machinery may include: using a key switch to control the flameout of the operating machinery, and when the key switch is turned off, the engine is directly turned off. With the continuous advancement of the production and construction technology of operating machinery, the tonnage of operating machinery (such as excavators) continues to increase. For some models, especially those with super-large tonnage, the hydraulic oil in the hydraulic system and the coolant in the engine are both equipped with independent heat dissipation devices, and the cooling fan is driven by a hydraulic motor. If the ambient temperature of the working environment of the operating machinery is high, and the operating machinery (such as an excavator) is in a high-load working condition for a long time, the key switch is suddenly controlled to be turned off, the engine is immediately turned off, and the cooling fan stops running, which may cause high temperature of the cooling system and high temperature of the engine intake, which may seriously cause heat dissipation or intake system failure. In addition, some models can adopt another flameout control method for operating machinery, which may include using flameout delay to control the flameout of the operating machinery, but the flameout delay time of this method is relatively fixed, and its heat dissipation efficiency is low.

[0065] Based on this, in a specific embodiment, the working machinery can automatically identify the current load state of the working machinery according to the current hydraulic oil temperature and the current coolant temperature, take the current load state of the working machinery into consideration, determine the target flameout delay duration based on the current load state of the working machinery, and intelligently match the corresponding target flameout delay duration according to the actual workload of the working machinery. The engine is controlled to flameout according to the target flameout delay duration. Compared with the prior art of controlling the engine to flameout according to a fixed flameout delay duration, the flexibility of setting the flameout delay duration is improved, and the occurrence of low load and high delay conditions or high load and low delay conditions is avoided. Sufficient heat dissipation can be achieved, and unnecessary energy consumption can be effectively reduced, thereby improving the heat dissipation efficiency of the working machinery.

[0066] An embodiment of the present application also provides a control device for a working machine, comprising: a memory configured to store instructions; and a processor configured to call the instructions from the above-mentioned memory and to implement the above-mentioned control method for the working machine when executing the instructions.

[0067] An embodiment of the present application also provides a working machine, including: an engine; a hydraulic system; and a control device for the working machine according to the above.

[0068] An embodiment of the present application also provides a machine-readable storage medium, on which instructions are stored, and the instructions are used to enable a machine to execute the above-mentioned control method for a working machine.

[0069] 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 in combination with 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.) that contain computer-usable program code.

[0070] 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.

[0071] 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.

[0072] 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 in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0073] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0074] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0075] Computer readable media include permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, program modules 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 technology, compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer readable media does not include temporary computer readable media (transitory media), such as modulated data signals and carrier waves.

[0076] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0077] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A control method for a working machine, characterized in that: The working machine includes a hydraulic system and an engine, and the control method includes: When an engine shutdown signal is received, obtaining a current hydraulic oil temperature of the hydraulic system and a current coolant temperature of the engine at the current moment; Determining a current load state of the working machine according to the current hydraulic oil temperature and the current coolant temperature; Determining a target flameout delay time according to the current load state; The engine is controlled to shut down according to the target shutdown delay time.

2. The control method according to claim 1, characterized in that: The determining of the target flameout delay time according to the current load state includes: Obtaining the current ambient temperature of the environment in which the operating machine is located; Determine the target preset delay time corresponding to the current load state based on the pre-stored correspondence between the load state and the delay time; The target ignition-off delay duration is determined according to the current ambient temperature and the target preset delay duration.

3. The control method according to claim 2, characterized in that: The step of determining the target flameout delay duration according to the current ambient temperature and the target preset delay duration includes: Determining a target ambient temperature coefficient corresponding to the current ambient temperature based on a pre-stored correspondence between the ambient temperature and the ambient temperature coefficient; The target ignition-off delay duration is determined according to the target preset delay duration and the target ambient temperature coefficient.

4. The control method according to claim 3, wherein determining the target flameout delay time according to the target preset delay time and the target ambient temperature coefficient comprises: The product value of the target preset delay time and the target ambient temperature coefficient is determined to obtain the target flameout delay time.

5. The control method according to claim 1, characterized in that: The determining of the target flameout delay time according to the current load state includes: Determining that the current load state is a low load state; Determine the preset delay duration corresponding to the low load state as the target flameout delay duration.

6. The control method according to claim 1, characterized in that: The determining of the target flameout delay time according to the current load state includes: Determining whether the current load state is a medium load state or a high load state; Controlling the engine to reduce its speed to a preset idle speed and not respond to an operation signal of a control mechanism of the working machine, so as to reduce the load of the working machine; When the current load state is a low load state, a preset delay duration corresponding to the low load state is determined as the target flameout delay duration.

7. The control method according to claim 1, characterized in that: The determining the current load state of the working machine according to the current hydraulic oil temperature and the current coolant temperature includes: When the current hydraulic oil temperature and / or the current coolant temperature is greater than or equal to the corresponding first temperature threshold, determining that the current load state of the working machine is a high load state; When the current hydraulic oil temperature and the current coolant temperature are less than corresponding second temperature thresholds, determining that the current load state of the working machine is a low load state; When the current hydraulic oil temperature and the current coolant temperature are lower than the corresponding first temperature threshold, and the current hydraulic oil temperature and / or the current coolant temperature are higher than or equal to the corresponding second temperature threshold, the current load state of the working machine is determined to be a medium load state; wherein the first temperature threshold is higher than the second temperature threshold.

8. The control method according to claim 1, characterized in that: The control method further comprises: When an engine shutdown signal is received, the engine speed is controlled to be reduced to a preset idle speed and / or does not respond to an operation signal of a control mechanism of the working machine.

9. A control device for a working machine, characterized in that: include: a memory configured to store instructions; as well as A processor is configured to call the instructions from the memory and implement the control method for a working machine according to any one of claims 1 to 8 when executing the instructions.

10. A working machine, characterized in that: include: engine; Hydraulic system; And a control device for a working machine according to claim 9.

11. A machine-readable storage medium, characterized in that: The machine-readable storage medium stores instructions for causing a machine to execute the control method for a working machine according to any one of claims 1 to 8.

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