Temperature control method and device for engineering machinery engine and storage medium

Abstract

The invention discloses a temperature control method and device for an engineering machinery engine, a cooling system, engineering machinery and a storage medium, and relates to the technical field of engineering equipment, and the engineering machinery can be a fuel oil framework or a new energy framework. The method comprises the following steps: determining the working condition of the automobile crane according to the connection state; when the working condition is the operation working condition, whether the current temperature of the engine is in a first temperature interval or not is determined according to the obtained temperature of the engine; under the condition that the current temperature is in the first temperature interval, rotating speed adjusting parameters of a fan rotating speed adjuster are adjusted to rotating speed adjusting parameter values corresponding to the current temperature; wherein the temperature lower limit value of the first temperature interval corresponds to the zero rotating speed adjusting parameter value of the fan rotating speed adjuster under the operation working condition, and the temperature lower limit value is larger than the temperature value corresponding to the zero rotating speed adjusting parameter value of the fan rotating speed adjuster under the driving working condition. The method can improve the engine heat efficiency of the automobile crane under the working condition.

Description

Technical Field

[0001] The present application relates to the technical field of engineering equipment, and in particular to a temperature control method, device, cooling system, engineering machinery and machine-readable storage medium for an engineering machinery engine. Background Art

[0002] The fan control technology for automobile cranes is the same as that for the commercial vehicle industry, and the fan speed adjustment parameters are mainly controlled according to the coolant temperature. In the actual application process, the existing fan control method for automobile cranes often has the problem of being difficult to match the crane's hoisting conditions, and will cause the engine temperature to be too low under the hoisting conditions, resulting in a decrease in thermal efficiency. However, improving the engine's thermal efficiency may cause the engine of the automobile crane to overheat during driving. In addition, according to the development trend of construction machinery such as automobile cranes, it can be seen that the new energy architecture has a certain scale, and pure electric extended-range electric, hybrid power, fuel cell electric, hydrogen engine and other power devices will be widely used in construction machinery such as automobile cranes. The above problems also exist in automobile cranes involving hybrid power. Therefore, how to propose a method that can improve the thermal efficiency of the automobile crane engine with a fuel architecture or a new energy architecture under hoisting conditions is a technical problem that needs to be solved at present. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a temperature control method for a truck crane, so as to solve the technical problem of low thermal efficiency of the truck crane under hoisting conditions in the prior art.

[0004] In order to achieve the above-mentioned object, the first aspect of the present application provides a temperature control method for an engineering machinery engine, the engineering machinery comprising an engine, a travel transmission device, an operating device and a cooling device, the travel transmission device is connected to the engine, the operating device is connected to the engine via a power take-off, and the cooling device comprises a fan for cooling a coolant and a fan speed regulator for adjusting the fan speed; the method comprises:

[0005] When the engine is in the starting state, obtain the temperature of the engine and the connection status of the power take-off and the engine;

[0006] Determine the working condition of the construction machinery according to the connection status, which includes driving condition and operating condition;

[0007] When the working condition is an operating condition, determining whether the current temperature of the engine is within a first temperature range according to the acquired temperature of the engine;

[0008] When the current temperature is within the first temperature range, adjusting the speed adjustment parameter of the fan speed regulator to a speed adjustment parameter value corresponding to the current temperature;

[0009] Among them, the lower temperature limit value of the first temperature range corresponds to the zero speed adjustment parameter value of the fan speed regulator under the operating condition, and the lower temperature limit value is greater than the temperature value corresponding to the zero speed adjustment parameter value of the fan speed regulator under the driving condition; the upper temperature limit value of the first temperature range corresponds to the maximum speed adjustment parameter value of the fan speed regulator under the operating condition.

[0010] In the embodiment of the present application, the lower limit value of the temperature is less than the lower limit value of the ideal operating temperature range of the engine.

[0011] In the embodiment of the present application, the upper temperature limit of the first temperature interval is within the ideal operating temperature interval.

[0012] In an embodiment of the present application, when the current temperature is greater than the upper limit value of the ideal operating temperature range under the operating condition, the speed adjustment parameter of the fan speed regulator is at the maximum speed adjustment parameter value; when the current temperature is less than or equal to the upper limit value of the ideal operating temperature range, and greater than the upper limit value of the temperature of the first temperature range, when the construction machinery switches from the driving condition to the operating condition, the rate of change of the engine temperature after switching to the operating condition is obtained; when the rate of change of the engine temperature is positive, the speed adjustment parameter of the fan speed regulator is at the maximum speed adjustment parameter value; when the rate of change of the engine temperature is negative, the fan stops running until the engine temperature is at the upper limit value of the temperature.

[0013] In the embodiment of the present application, under the driving condition and when the current temperature is equal to the lower limit of the temperature, the speed adjustment parameter of the fan speed regulator is at the maximum speed adjustment parameter value.

[0014] In an embodiment of the present application, when the vehicle is in a driving condition and the current temperature is in the second temperature range, the speed adjustment parameter of the fan speed regulator is positively correlated with the temperature of the engine, and the upper limit value of the second temperature range corresponds to the maximum speed adjustment parameter value of the fan speed regulator; when the current temperature is lower than the lower limit value of the ideal operating temperature range, and the current temperature is greater than the lower limit value of the temperature, when the construction machinery switches from a driving condition to an operating condition, the rate of change of the engine temperature after switching to the operating condition is obtained; when the rate of change of the engine temperature is negative, the fan stops running until the engine temperature is at the upper limit value of the temperature.

[0015] In an embodiment of the present application, obtaining the temperature of the engine includes: obtaining the temperature of the coolant and the intake temperature of the engine; and determining the temperature of the engine according to the temperature of the coolant and the intake temperature.

[0016] A second aspect of the present application provides a temperature control device for an engineering machinery engine, comprising: a memory configured to store instructions; and a processor configured to call instructions from the memory and to implement a method for temperature control of an engineering machinery engine provided in accordance with any of the above embodiments when executing the instructions.

[0017] The third aspect of the present application provides a cooling system for an engineering machinery engine, comprising: a radiator; a fan for cooling the coolant flowing through the radiator; a fan speed regulator for adjusting the speed of the fan; a temperature sensor for detecting the temperature of the coolant; and a temperature control device for an engineering machinery engine as provided in the above-mentioned embodiment.

[0018] The fourth aspect of the present application provides a construction machinery, comprising: an engine; a travel transmission device, the travel transmission device is connected to the engine; an operating device, the operating device is connected to the engine via a power take-off; and a cooling system for the construction machinery engine as provided in the above embodiment.

[0019] A fifth 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 a temperature control method for an engineering machinery engine provided according to any one of the above embodiments.

[0020] Through the above technical solution, the lower temperature limit of the first temperature range is set above the temperature value corresponding to the zero speed adjustment parameter value of the fan speed regulator in the driving condition, so that the engine temperature can be increased to a higher value, and the fan speed is adjusted at this higher value by controlling the speed adjustment parameter of the fan speed regulator, and then the engine temperature is adjusted, so that the engine can achieve thermal balance at a higher temperature to improve the thermal efficiency of the engine; thereby, more engine heat is converted into useful work, and the viscosity and friction coefficient of the engine lubricating oil are within a reasonable range to improve mechanical efficiency, and unnecessary fan work is avoided to reduce the mechanical energy consumption of the fan and reduce the generation of fan operation noise.

[0021] 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

[0022] 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:

[0023] Figure 1 A schematic flow chart of a temperature control method for a truck crane according to an embodiment of the present application is shown;

[0024] Figure 2 A schematic diagram of a relationship curve between the engine temperature of a truck crane and a speed regulating parameter of a fan speed regulator under a driving condition and an operating condition according to an embodiment of the present application is schematically shown;

[0025] Figure 3 The schematic structural block diagram of a cooling system for a truck crane engine according to an embodiment of the present application is schematically shown. 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] Truck cranes generally share the same engine and temperature control system under hoisting conditions and driving conditions. The corresponding existing temperature control method has a single control method for the fan speed in the temperature control system, and is mainly aimed at preventing the engine of the truck crane from overheating. When the truck crane travels to the construction site and operates under the hoisting condition, the existing technology continues to use the fan speed control method under the driving condition. When the engine is at the same temperature under the two conditions, its heat dissipation rate is the same, but because the engine operating power under the hoisting condition is low, the engine heat generation rate is low, and the engine temperature may be stabilized at a lower temperature, thereby reducing the thermal efficiency of the engine. After analysis, it was found that the maximum demand for engine power under the hoisting condition is about half of the demand for engine power under the driving condition, and under the hoisting condition, the operating device of the truck crane continuously switches between the four actions of amplitude change, rotation, extension and lifting, and the power requirements are different. Among them, the power consumption to meet the upward lifting condition is the largest, but it generally does not run continuously for a long time. Based on this, the inventor of the present application proposed a temperature control method for an engineering machinery engine to improve the thermal efficiency of the engine under hoisting conditions and meet the heat dissipation requirements of the engine under driving conditions.

[0031] Figure 1 The following schematically shows a flow chart of a temperature control method for engineering machinery according to an embodiment of the present application. Figure 1 As shown, an embodiment of the present application provides a temperature control method for engineering machinery, which can be applied to engineering machinery with a fuel architecture or a system energy architecture. The engineering machinery may include an engine, a travel transmission device, an operating device and a cooling device. The travel transmission device is connected to the engine, the operating device is connected to the engine through a power take-off, and the cooling device is connected to the engine. The cooling device includes a fan for cooling the coolant and a fan speed regulator for adjusting the fan speed. The temperature control method for engineering machinery provided in an embodiment of the present application can be executed, for example, by an engine control unit in a car jack, or by other processors that can be used to control the cooling device.

[0032] The present application provides a temperature control method for engineering machinery, which may include the following steps:

[0033] S102, when the engine is in a started state, obtaining the temperature of the engine and the connection state of the power take-off and the engine;

[0034] S104, determining the working condition of the engineering machinery according to the connection state, the working condition including the driving condition and the operating condition;

[0035] S106, when the working condition is an operating condition, determining whether the current temperature of the engine is within a first temperature range according to the acquired temperature of the engine;

[0036] S108, when the current temperature is within the first temperature range, adjusting the speed adjustment parameter of the fan speed regulator to a speed adjustment parameter corresponding to the current temperature;

[0037] Among them, the lower temperature limit value of the first temperature range corresponds to the zero speed adjustment parameter value of the fan speed regulator under the operating condition, and the lower temperature limit value is greater than the temperature value corresponding to the zero speed adjustment parameter value of the fan speed regulator under the driving condition; the upper temperature limit value of the first temperature range corresponds to the maximum speed adjustment parameter value of the fan speed regulator under the operating condition.

[0038] The temperature control method for engineering machinery provided in the embodiment of the present application uses the connection state of the power take-off and the engine as a criterion to determine the working condition of the engineering machinery. When the connection state is closed, the engine drives the working device through the power take-off, and the engineering machinery is in the working condition. Under the working condition, if the current temperature of the engine is in the first temperature range, the speed adjustment parameter of the fan speed regulator of the fan will change with the change of the current temperature. Since the demand for engine power in the working condition is lower than that in the driving condition, the heat generated by the engine in the working condition is also less. Therefore, if the temperature control method under the existing driving condition is used, when the current temperature is low, the heat exchange rate between the engine and the outside world will be the same as the heat generation rate of the engine, so that the engine reaches thermal equilibrium at a lower temperature value. By setting the lower limit value of the temperature in the first temperature range above the temperature value corresponding to the zero speed adjustment parameter value of the fan speed regulator of the driving condition, the engine temperature can be raised to a higher value, and the fan speed is adjusted by controlling the speed adjustment parameter of the fan speed regulator at this higher value, and then the engine temperature is adjusted, so that the engine can achieve thermal equilibrium at a higher temperature to improve the thermal efficiency of the engine. Therefore, the temperature control method for engineering machinery provided in the embodiment of the present application is suitable for engineering machinery with a fuel architecture or engineering machinery with a new energy architecture (such as a hybrid architecture) based on engine-driven driving conditions and operating conditions. It can convert more engine heat into useful work under operating conditions, and make the viscosity and friction coefficient of the engine lubricating oil within a reasonable range to improve mechanical efficiency, and avoid unnecessary fan work to reduce the mechanical energy consumption of the fan and reduce the generation of fan operation noise.

[0039] It can be understood that the engineering machinery in the embodiment of the present application may include: cranes, excavators and pump trucks, etc. The operating device may include: a lifting device of a crane, an excavation operating device of an excavator, and a pumping operating device of a pump truck. The operating condition can be understood as the operating condition of the above-mentioned different operating devices during operation. In the first temperature interval of step S106, there is a correlation between the speed adjustment parameter of the fan speed regulator and the current temperature of the engine, and the correlation may be a linear, exponential, or broken line correlation. The speed adjustment parameter of the fan speed regulator is generally positively correlated with the current temperature of the engine, that is, the larger the current temperature, the larger the speed adjustment parameter. Similarly, in the driving condition, the fan speed adjustment parameter is generally positively correlated with the current temperature. The fan speed regulator may be, for example, a fan clutch such as an electromagnetic clutch, a hydraulic clutch, or a voltage or current regulator. In the case where the fan speed regulator is a fan clutch, the speed adjustment parameter is the degree of engagement of the fan clutch. In the case where the fan speed regulator is a voltage or current regulator, the speed adjustment parameter is a voltage or current value. Therefore, in step S108, the speed adjustment parameter of the fan speed regulator is adjusted to the speed adjustment parameter value corresponding to the current temperature, that is, according to the above linear, exponential, broken line and other correlation relationships, the corresponding speed adjustment parameter value is determined according to the current temperature.

[0040] Specifically, when the fan speed regulator is a fan clutch, the speed regulation parameter is the meshing degree of the fan clutch. In the first temperature range, the current temperature and the speed regulation parameter are, for example, linearly correlated. When the current temperature is a certain value in the first temperature range, there is a corresponding meshing degree value, and the meshing degree value directly reflects the speed of the fan.

[0041] Through experimental verification of truck cranes in operating conditions, the engine efficiency is improved by 1%, and engine wear can be reduced to improve engine reliability. In addition, the mechanical energy consumption of the fan can be reduced by 10%, and the fuel consumption in operating conditions can be reduced by 0.3L / h.

[0042] As an example, in the case where the fan speed regulator is a fan clutch, in step S108, the zero speed adjustment parameter value may correspond to the initial engagement point of the fan clutch, and the engagement degree of the initial engagement point is 0%, and the maximum speed adjustment parameter value may correspond to the full engagement point of the fan clutch, and the engagement degree of the full engagement point is 100%. In an embodiment of the present application, the speed adjustment parameters corresponding to the zero speed adjustment parameter value and the maximum speed adjustment parameter value may also be set according to actual conditions. For example, in the case where the fan speed regulator is a fan clutch, the engagement degree of the initial engagement point is 10%, and the engagement degree of the full engagement point is 90%. The engagement degree adjustment of the fan clutch can be achieved through an electrically controlled silicone oil clutch or an electromagnetic clutch. The electrically controlled silicone oil clutch fan determines the friction force by adjusting the amount of silicone oil in the working chamber to control the speed adjustment parameter, and the electromagnetic clutch fan controls the speed adjustment parameter by adjusting the size of the electromagnetic force.

[0043] In some embodiments of the present application, the lower limit value of the temperature of the first temperature interval is less than the lower limit value of the ideal operating temperature interval of the engine.

[0044] Under operating conditions, it is still necessary to prevent the engine from overheating, so the lower limit value of the temperature in the first temperature range is set below the lower limit value of the ideal operating temperature range, so that the current temperature of the engine can be controlled before entering the ideal operating temperature range.

[0045] Furthermore, in some embodiments of the present application, an upper temperature limit of the first temperature interval is within an ideal operating temperature interval.

[0046] Through the above settings, the first temperature interval overlaps with the ideal operating temperature interval of the engine, and when the current temperature of the engine reaches the upper temperature limit of the first temperature interval, the speed adjustment parameter of the fan speed regulator is at the maximum speed adjustment parameter value. Therefore, the temperature control method for the automobile engine provided in the embodiment of the present application can achieve thermal balance of the engine within the ideal temperature interval by adjusting the speed adjustment parameter of the fan speed regulator when the current temperature of the engine is within the ideal temperature interval.

[0047] Furthermore, in some embodiments of the present application, when the engineering machinery is in an operating condition and the current temperature is greater than the upper limit of the ideal operating temperature range, the speed adjustment parameter of the fan speed regulator is at the maximum speed adjustment parameter value;

[0048] When the current temperature is less than or equal to the upper limit of the ideal operating temperature range and greater than the upper limit of the temperature of the first temperature range, when the construction machinery switches from the driving condition to the working condition, obtaining the rate of change of the engine temperature;

[0049] When the rate of change of the engine temperature is positive, the speed adjustment parameter of the fan speed regulator is at the maximum speed adjustment parameter value;

[0050] When the rate of change of the engine temperature is negative, the fan stops running until the engine temperature reaches the upper temperature limit.

[0051] In the driving condition, since the current temperature of the engine is between the upper limit of the ideal operating temperature range and the upper limit of the first temperature range, the engine is working in the ideal temperature range at this time. If the construction machinery switches from the driving condition to the working condition in this case, the actual power demand of the working condition for the engine will be significantly reduced, so the heat generated by the engine will also be significantly reduced. If the obtained engine temperature change rate is negative, it means that the fan is gradually cooling the engine at this time, so the fan is stopped, that is, for example, the engagement degree of the fan clutch is adjusted to 0%, which, on the one hand, slows down or makes the engine cool down or achieve thermal balance in the ideal temperature range, and on the other hand, avoids unnecessary mechanical energy consumption of the fan.

[0052] As an example, the construction machinery is a truck crane, and the fan speed regulator is a fan clutch, see Figure 2 , the horizontal axis T is temperature, and the vertical axis R is the degree of engagement of the fan clutch. The temperature value corresponding to the initial engagement point of the fan clutch in the driving condition is 80 degrees, and the temperature value corresponding to the full engagement point of the fan clutch in the driving condition is 90 degrees; the lower limit of the temperature in the first temperature interval of the hoisting condition is 90 degrees, and the upper limit of the temperature is 96 degrees. The ideal temperature range of the engine is 95 to 100 degrees. Based on this, if the truck crane switches from the driving condition to the hoisting condition when the current temperature of the engine is in the range of 96 to 100 degrees, the rate of change of the engine temperature is obtained, and the fan clutch is controlled according to the positive and negative change rate.

[0053] In some embodiments of the present application, in a driving condition and when the current temperature is equal to the lower limit of the temperature, the speed adjustment parameter of the fan speed regulator is at the maximum speed adjustment parameter value.

[0054] Further, in some embodiments of the present application, in a driving condition and when the current temperature is in a second temperature range, the speed adjustment parameter of the fan speed regulator is positively correlated with the temperature of the engine, and the upper limit value of the second temperature range corresponds to the maximum speed adjustment parameter value of the fan speed regulator;

[0055] When the current temperature is less than the lower limit of the ideal working temperature range and greater than the lower limit of the temperature, when the truck crane switches from the driving condition to the working condition, the rate of change of the engine temperature after switching to the working condition is obtained;

[0056] When the rate of change of the engine temperature is negative, the fan stops running until the engine temperature reaches the upper temperature limit.

[0057] In the driving condition, and in the process of gradually heating up from low temperature, if the construction machinery switches to the working condition, the heat generated by the engine will drop significantly. If the change rate of the obtained engine temperature is negative, the fan will be stopped to reduce the mechanical energy consumption of the fan and prevent the current temperature of the engine from dropping further to avoid reducing the thermal efficiency of the engine.

[0058] Based on the above, if the rate of change of the engine temperature is positive, the speed adjustment parameter of the fan speed regulator is adjusted according to the correlation between the speed adjustment parameter of the fan speed regulator and the current temperature of the engine in the first temperature range.

[0059] Specifically, the rate of change of the engine temperature can be determined based on the engine temperature at the start time and the engine temperature at the end time of the preset time period, and the rate of change of the engine temperature can be updated in real time at preset time intervals until the engine temperature reaches the upper temperature limit.

[0060] In some embodiments of the present application, obtaining the temperature of the engine in step S102 may include:

[0061] Get the coolant temperature and the engine intake air temperature;

[0062] The temperature of the engine is determined based on the temperature of the coolant and the intake air temperature.

[0063] Furthermore, obtaining the temperature of the engine may also include obtaining an air conditioning switch signal; and determining the temperature of the engine according to the coolant temperature, the intake air temperature and the air conditioning switch signal.

[0064] The embodiment of the present application also provides a temperature control device for an engineering machinery engine, comprising: a memory and a processor. The memory is configured to store instructions; the processor is configured to call instructions from the memory and to implement the method for temperature control of an engineering machinery engine provided in any of the above embodiments when executing the instructions.

[0065] See also Figure 3 The present application also provides a cooling system for an engineering machinery engine, including: a radiator 330, a fan 340, a fan speed regulator 350, a temperature control device 360 ​​and a temperature sensor 370. The fan 340 is used to cool the coolant flowing through the radiator 330; the fan speed regulator 350 is used to adjust the speed of the fan; the temperature sensor 370 is used to detect the temperature of the coolant; the temperature control device 360 ​​can be the temperature control device for the engineering machinery engine provided in the above embodiment.

[0066] It can be understood that the radiator 330 and the engine 310 are in contact with each other through a coolant pipeline, and the coolant flows in the cooling pipeline and is driven by a coolant pump 320 .

[0067] The embodiment of the present application also provides an engineering machine, including an engine, a travel transmission device and an operating device. The travel transmission device is connected to the engine, and the operating device is connected to the engine through a power take-off. The travel transmission device of the engineering machine can be connected to the engine through a gearbox. The operating device of the engineering machine is connected to the gearbox through a power take-off.

[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 method for temperature control of an engineering machinery engine.

[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. 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 temperature control method for an engineering machinery engine, characterized in that: The engineering machinery comprises an engine, a travel transmission device, a working device and a cooling device, wherein the travel transmission device is connected to the engine, the working device is connected to the engine via a power take-off, and the cooling device comprises a fan for cooling a coolant and a fan speed regulator for adjusting the fan speed; the method comprises: When the engine is in a started state, obtaining the temperature of the engine and the connection state between the power take-off and the engine; Determining the working condition of the engineering machinery according to the connection state, wherein the working condition includes a driving condition and an operating condition; When the working condition is the operating condition, determining whether the current temperature of the engine is within a first temperature range according to the acquired temperature of the engine; When the current temperature is within the first temperature range, adjusting the speed adjustment parameter of the fan speed regulator to a speed adjustment parameter value corresponding to the current temperature; Among them, the lower temperature limit value of the first temperature range corresponds to the zero speed adjustment parameter value of the fan speed regulator under the operating condition, and the lower temperature limit value is greater than the temperature value corresponding to the zero speed adjustment parameter value of the fan speed regulator under the driving condition; the upper temperature limit value of the first temperature range corresponds to the maximum speed adjustment parameter value of the fan speed regulator under the operating condition.

2. The method according to claim 1, characterized in that The lower limit value of the temperature is less than the lower limit value of the ideal operating temperature range of the engine.

3. The method according to claim 2, characterized in that The upper temperature limit of the first temperature interval is within the ideal operating temperature interval.

4. The method according to claim 3, characterized in that: When the current temperature is greater than the upper limit of the ideal operating temperature range under the operating condition, the speed adjustment parameter of the fan speed regulator is at the maximum speed adjustment parameter value; When the current temperature is less than or equal to the upper limit of the ideal operating temperature range and greater than the upper limit of the temperature of the first temperature range, when the engineering machinery switches from the driving condition to the working condition, obtaining the rate of change of the engine temperature after switching to the working condition; When the rate of change of the engine temperature is positive, the speed adjustment parameter of the fan speed regulator is at a maximum speed adjustment parameter value; When the rate of change of the engine temperature is negative, the fan stops operating until the engine temperature reaches the upper temperature limit.

5. The method according to claim 3, characterized in that: In the driving condition and when the current temperature is equal to the lower limit of the temperature, the speed adjustment parameter of the fan speed regulator is at a maximum speed adjustment parameter value.

6. The method according to claim 2, characterized in that In the driving condition and when the current temperature is in a second temperature range, the speed adjustment parameter of the fan speed regulator is positively correlated with the temperature of the engine, and the upper limit value of the second temperature range corresponds to the maximum speed adjustment parameter value of the fan speed regulator; When the current temperature is less than the lower limit of the ideal operating temperature range and the current temperature is greater than the lower limit of the temperature, when the engineering machinery switches from the driving condition to the working condition, obtaining the rate of change of the engine temperature after switching to the working condition; When the rate of change of the engine temperature is negative, the fan stops operating until the engine temperature reaches the upper temperature limit.

7. The method according to claim 1, characterized in that Acquiring the temperature of the engine includes: Acquiring the temperature of the coolant and the intake air temperature of the engine; The temperature of the engine is determined based on the temperature of the coolant and the intake air temperature.

8. A temperature control device for an engineering machinery engine, characterized in that: include: a memory configured to store instructions; A processor is configured to call the instruction from the memory and implement the method for temperature control of an engineering machinery engine according to any one of claims 1 to 7 when executing the instruction.

9. A cooling system for an engineering machinery engine, characterized in that: include: heat sink; a fan, used to cool the coolant flowing through the radiator; A fan speed regulator, used to adjust the speed of the fan; A temperature sensor, used to detect the temperature of the coolant; The temperature control device for an engineering machinery engine as claimed in claim 8.

10. An engineering machine, characterized in that: include: engine; A travel transmission device, the travel transmission device is connected to the engine; A working device, wherein the working device is connected to the engine via a power take-off; A cooling system for an engineering machinery engine as claimed in claim 9.

11. A machine-readable storage medium, characterized in that: The machine-readable storage medium stores instructions, which are used to enable a machine to execute the temperature control method for an engineering machinery engine according to any one of claims 1 to 7.

Images