Engine cooling system and method of controlling and controller therefor

Abstract

The application provides an engine cooling system, a control method and a controller thereof. The engine cooling system comprises a first pumping device, an engine, a temperature sensor, a first cooling device and a second cooling device. The inlet of the first pumping device is communicated with the outlet of the second cooling device. The outlet of the first pumping device is communicated with the inlet of the engine. The first pumping device is used for pumping a first cold source to the engine. The outlet of the engine is communicated with the inlet of the first cooling device. The temperature sensor is arranged on a communication pipeline between the outlet of the engine and the inlet of the first cooling device. The outlet of the first cooling device is communicated with the inlet of the first pumping device. The outlet of the first cooling device is communicated with the inlet of the second cooling device. The temperature sensor is used for detecting the temperature of the first cold source discharged by the engine. The problem of excessive space occupation of the engine cooling system in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of engines, and in particular, to an engine cooling system, a control method of the engine cooling system, a controller of the engine cooling system, and an engine system. BACKGROUND

[0002] In order to reduce the heat generated during the operation of the engine and make the engine operate in an optimal temperature range, a large-capacity water tank is arranged in the cooling system of the engine to store more coolant. However, this way increases the floor space occupied by the engine cooling system, affecting the miniaturization of the engine system. SUMMARY

[0003] The main purpose of the present application is to provide an engine cooling system, a control method of the engine cooling system, a controller of the engine cooling system, and an engine system to at least solve the problem of excessive space occupied by the engine cooling system in the prior art.

[0004] According to an aspect of the present application, an engine cooling system is provided, comprising a first pumping device, an engine, a temperature sensor, a first cooling device, and a second cooling device, wherein the inlet of the first pumping device is in communication with the outlet of the second cooling device, the outlet of the first pumping device is in communication with the inlet of the engine, the first pumping device is used for pumping a first cold source to the engine, the outlet of the engine is in communication with the inlet of the first cooling device, the temperature sensor is arranged on the communication pipeline between the outlet of the engine and the inlet of the first cooling device, the outlet of the first cooling device is in communication with the inlet of the first pumping device, the outlet of the first cooling device is in communication with the inlet of the second cooling device, the temperature sensor is used for detecting the temperature of the first cold source discharged by the engine, the first cooling device and the second cooling device are used for reducing the temperature of the first cold source, the first cooling device is one of a liquid cooling device and an air cooling device, and the second cooling device is the other of the liquid cooling device and the air cooling device.

[0005] Optionally, the first cooling device is the liquid cooling device, the first cooling device comprises a heat exchange device, the engine cooling system further comprises a second pumping device, the second pumping device is in communication with the heat exchange device, wherein the inlet of the first cooling device is the inlet of the heat exchange device, the outlet of the first cooling device is the outlet of the heat exchange device, the inlet of the second pumping device is in communication with the outside of the engine cooling system, the outlet of the second pumping device is in communication with the heat exchange device, the second pumping device is used for pumping a second cold source located outside the engine cooling system to the heat exchange device, and the heat exchange device is used for reducing the temperature of the first cold source by using the second cold source and discharging the second cold source.

[0006] Optionally, the second cooling device is an air cooling device, the second cooling device comprises a fan and a water tank heat dissipation device, wherein the inlet of the water tank heat dissipation device is the inlet of the second cooling device, the outlet of the water tank heat dissipation device is the outlet of the second cooling device, and the fan is located at least one side of the water tank heat dissipation device, and the fan is used for inhaling gas and sweeping the water tank heat dissipation device to reduce the temperature of the first cold source in the water tank heat dissipation device.

[0007] According to another aspect of the present application, a control method of any of the engine cooling systems is provided, comprising: determining whether the engine cooling system works in water, controlling the second cooling device to work in the case that the engine cooling system does not work in water; in the case that the engine cooling system works in water, controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine, to obtain a first temperature; determining whether the first temperature is greater than a first temperature threshold, in the case that the first temperature is less than or equal to the first temperature threshold, controlling the first cooling device to work; in the case that the first temperature is greater than the first temperature threshold, controlling the second cooling device and the first cooling device to work.

[0008] Optionally, the second cooling device is a wind cooling device, and the second cooling device comprises a fan and a water tank cooling device; when the first temperature is greater than the first temperature threshold, the second cooling device is controlled to work, comprising: a first control step of determining whether the first temperature is greater than or equal to a second temperature threshold; when the first temperature is greater than or equal to the second temperature threshold, the speed of the fan is controlled to be a rated speed, and an alarm signal is output, wherein the second temperature threshold is greater than the first temperature threshold, the rated speed is the maximum speed of the fan, and the alarm signal is used to represent that the engine cooling system is faulty; a second control step of determining a first target speed according to at least the first temperature, the second temperature threshold and the rated speed when the first temperature is less than the second temperature threshold, and controlling the fan to run at the first target speed.

[0009] Optionally, the first target speed is determined according to at least the first temperature, the second temperature threshold and the rated speed, comprising: calculating the first target speed n according to the formula wherein T0 is the second temperature threshold, T is the first temperature, t is a temperature margin of the temperature of the first cold source controlled by the fan, the temperature margin is greater than the difference between the second temperature threshold and the first temperature threshold, and N is the rated speed.

[0010] Optionally, after the fan is controlled to run at the first target speed, the method further comprises: a third control step of controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine to obtain a second temperature; a fourth control step of determining whether the second temperature is less than or equal to a predetermined difference; when the second temperature is less than or equal to the predetermined difference, the fan is controlled to not work, wherein the predetermined difference is the difference between the second temperature threshold and the temperature margin; and a repeating step of, when the second temperature is greater than the predetermined difference, sequentially repeating the first control step, the second control step and the third control step at least once, and updating the first temperature in the first control step to the second temperature in the third control step obtained in the last repeating process until the second temperature is less than or equal to the predetermined difference.

[0011] Optionally, the second cooling device is a wind cooling device, and the second cooling device comprises a fan and a water tank cooling device. In a case where the engine cooling system does not work in water, the second cooling device is controlled to work, comprising: controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine, to obtain a third temperature; determining, according to a mapping relationship between the temperature of the first cold source and the rotating speed of the fan and the third temperature, the rotating speed of the fan corresponding to the third temperature as a second target rotating speed; and controlling the fan to operate at the second target rotating speed.

[0012] According to still another aspect of the present application, a controller of any one of the engine cooling systems is provided, comprising: a first control unit configured to determine whether the engine cooling system works in water, and control the second cooling device to work in a case where the engine cooling system does not work in water; a second control unit configured to control the temperature sensor to obtain the temperature of the first cold source discharged by the engine, to obtain a first temperature in a case where the engine cooling system works in water; a third control unit configured to determine whether the first temperature is greater than a first temperature threshold, and control the first cooling device to work in a case where the first temperature is less than or equal to the first temperature threshold; and a fourth control unit configured to control the second cooling device and the first cooling device to work in a case where the first temperature is greater than the first temperature threshold.

[0013] According to still another aspect of the present application, an engine system is provided, comprising any one of the engine cooling systems and the controller, and the controller performs any one of the control methods of the engine cooling system.

[0014] The technical scheme of the application provides an engine cooling system, which comprises a first pumping device, an engine, a temperature sensor, a first cooling device and a second cooling device, the inlet of the first pumping device is communicated with the outlet of the second cooling device, the outlet of the first pumping device is communicated with the inlet of the engine, the first pumping device is used for pumping a first cold source to the engine, the outlet of the engine is communicated with the inlet of the first cooling device, the temperature sensor is arranged on a communication pipeline between the outlet of the engine and the inlet of the first cooling device, the outlet of the first cooling device is communicated with the inlet of the first pumping device, the outlet of the first cooling device is communicated with the inlet of the second cooling device, and the temperature sensor is used for detecting the temperature of the first cold source discharged by the engine. The inlet of the first pumping device is communicated with the outlet of the second cooling device, the outlet of the first cooling device is communicated with the inlet of the first pumping device, the communication between the outlet of the first cooling device and the outlet of the second cooling device is realized, the first cold source originally flowing into the second cooling device directly flows from the outlet of the first cooling device to the inlet of the first pumping device due to the fact that the first cooling device is simultaneously communicated with the inlet of the outlet of the second cooling device, the capacity of the first cold source flowing through the second cooling device can be reduced, the volume of the second cooling device for storing the first cold source can be reduced, the volume of the engine cooling system is further reduced, and the technical problem of the engine cooling system occupying too large space is solved. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the application, and together with the specification explain the application. The use of these drawings is to explain the preferred embodiments of the application and is not intended in any way to restrict the application. In the drawings:

[0016] Figure 1 A structural schematic diagram of an engine cooling system provided in an embodiment of the application is shown;

[0017] Figure 2 A structural schematic diagram of an engine cooling system provided in an embodiment of the application is shown;

[0018] Figure 3 A structural schematic diagram of an engine cooling system provided in an embodiment of the application is shown;

[0019] Figure 4 A hardware structural block diagram of a mobile terminal for executing a control method of an engine cooling system is shown according to an embodiment of the application;

[0020] Figure 5 A flowchart of a control method of an engine cooling system is shown according to an embodiment of the application;

[0021] Figure 6A specific flowchart of a control method of an engine cooling system is shown according to an embodiment of the present application.

[0022] Figure 7 A structural block diagram of a controller of an engine cooling system is shown according to an embodiment of the present application.

[0023] Wherein, the above-mentioned drawings include the following reference signs:

[0024] 10, first pumping device; 20, engine; 30, temperature sensor; 40, first cooling device; 402, heat exchange equipment; 50, second cooling device; 502, fan; 504, water tank heat dissipation equipment; 60, second pumping device; 202, processor; 204, memory; 206, transmission equipment; 208, input and output equipment. DETAILED DESCRIPTION

[0025] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0026] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor should belong to the scope of protection of the present application.

[0027] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, not necessarily to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not necessarily limit to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] As introduced in the background, the engine cooling system in the prior art occupies too much space. To solve the above-mentioned problem, the embodiments of the present application provide an engine cooling system, a control method of an engine cooling system, a controller of an engine cooling system and an engine system.

[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0030] Figure 1 This is a schematic diagram of the engine cooling system according to an embodiment of this application. Figure 1 As shown, the engine cooling system includes a first pumping device 10, an engine 20, a temperature sensor 30, a first cooling device 40, and a second cooling device 50. The inlet of the first pumping device 10 is connected to the outlet of the second cooling device 50, and the outlet of the first pumping device 10 is connected to the inlet of the engine 20. The first pumping device 10 pumps a first cold source to the engine 20. The outlet of the engine 20 is connected to the inlet of the first cooling device 40. The temperature sensor 30 is located at the outlet of the engine 20 and the inlet of the first cooling device 50. On the connecting pipe of the inlet of device 40, the outlet of the first cooling device 40 is connected to the inlet of the first pumping device 10, and the outlet of the first cooling device 40 is connected to the inlet of the second cooling device 50. The temperature sensor 30 is used to detect the temperature of the first cold source discharged by the engine 20. The first cooling device 40 and the second cooling device 50 are used to reduce the temperature of the first cold source. The first cooling device 40 is one of a liquid cooling device and an air cooling device, and the second cooling device 50 is the other of a liquid cooling device and an air cooling device.

[0031] Specifically, the engine cooling system is a component of the engine system responsible for controlling the engine's operating temperature to ensure it operates at its optimal temperature while preventing overheating. Types of cooling systems include water-cooled, air-cooled, and oil-cooled systems. Water-cooled systems use water or a special coolant as the cooling medium, absorbing and dissipating heat through circulation. Air-cooled systems rely on airflow for heat dissipation, while oil-cooled systems use oil as the cooling medium and are used in high-performance or high-load engines. The working principle of the cooling system is as follows: A water pump draws coolant from the radiator and delivers it to the engine. The coolant flows through the engine's cooling channels, absorbing the heat generated by the engine. The heated coolant returns to the radiator, where it exchanges heat with the air, dissipating heat. The cooled coolant is then drawn back by the water pump, forming a cycle. The flow of coolant is adjusted according to the engine temperature to maintain the engine at its optimal operating temperature.

[0032] The engine cooling system can be applied to an amphibious vehicle. When the engine is in normal operation, the liquid cooling device is used for cooling during the vehicle running on water; and the air cooling device is used for cooling during the vehicle running on land. Since the engine power of the vehicle running on land is far lower than that of the vehicle running on water, by connecting the passage between the first cooling device and the second cooling device with the inlet of the first pumping device, the water flow through the second cooling device is reduced, and the volume of the water tank of the second cooling device can be reduced. The first pumping device can be a fresh water pump.

[0033] The engine cooling system provided by the embodiment comprises a first pumping device, an engine, a temperature sensor, a first cooling device and a second cooling device. The outlet of the second cooling device is communicated with the inlet of the first pumping device. The outlet of the first pumping device is communicated with the inlet of the engine. The first pumping device is used for pumping a first cold source to the engine. The outlet of the engine is communicated with the inlet of the first cooling device. The temperature sensor is arranged on a communication pipeline between the outlet of the engine and the inlet of the first cooling device. The outlet of the first cooling device is communicated with the inlet of the second cooling device. The temperature sensor is used for detecting the temperature of the first cold source discharged by the engine. By communicating the inlet of the first pumping device with the outlet of the second cooling device and communicating the outlet of the first cooling device with the inlet of the first pumping device, the outlet of the first cooling device is communicated with the outlet of the second cooling device. Since the first cooling device is simultaneously communicated with the inlet of the outlet of the second cooling device, the first cold source originally flowing into the second cooling device directly flows from the outlet of the first cooling device to the inlet of the first pumping device, the capacity of the first cold source flowing through the second cooling device can be reduced, the volume of the second cooling device storing the first cold source can be reduced, the volume of the engine cooling system is further reduced, and the technical problem of the engine cooling system occupying too much space is solved.

[0034] In the implementation process, for example, Figure 2As shown, the first cooling device 40 is the liquid cooling device, which includes a heat exchange device 402. The engine cooling system also includes a second pumping device 60, which is connected to the heat exchange device 402. The inlet of the first cooling device 40 is the inlet of the heat exchange device 402, and the outlet of the first cooling device 40 is the outlet of the heat exchange device 402. The inlet of the second pumping device 60 is connected to the outside of the engine cooling system, and the outlet of the second pumping device 60 is connected to the heat exchange device 402. The second pumping device 60 pumps a second cold source located outside the engine cooling system to the heat exchange device 402. The heat exchange device 402 uses the second cold source to reduce the temperature of the first cold source and discharges the second cold source. The connection methods of the remaining components—the first pumping device 10, the engine 20, the temperature sensor 30, and the second cooling device 50—are as follows: Figure 2 As shown, further details are omitted here. In the above structure, the first cooling device only includes a heat exchange device, which can further simplify the structure of the first cooling device. Connecting to the outside environment via a second pumping device, seawater is used directly as a second cold source, further reducing the amount of coolant used.

[0035] Specifically, the second cold source can use water or a special coolant as the cooling medium, absorbing and dissipating heat through circulation. When the amphibious vehicle is operating on water, the second pumping device can be a clutch-controlled seawater pump, using seawater as the second cold source for cooling.

[0036] In the specific implementation process, such as Figure 3 As shown, the second cooling device 50 is an air-cooled device, comprising a fan 502 and a water tank radiator 504. The inlet of the water tank radiator 504 is the inlet of the second cooling device 50, and the outlet of the water tank radiator 504 is the outlet of the second cooling device 50. The fan 502 is located on at least one side of the water tank radiator 504 and is used to draw in air and purge the water tank radiator 504 to reduce the temperature of the first cold source within the water tank radiator 504. The connection methods of the remaining components—the first pumping device 10, the engine 20, the temperature sensor 30, and the first cooling device 40—are as follows: Figure 3 As shown, details will not be repeated here. The second cooling device in this structure includes a fan and a water tank for heat dissipation, which can further simplify the structure of the aforementioned second cooling device.

[0037] Specifically, the air-cooling system relies on the air drawn in by a fan to cool the coolant flowing out of the engine. This fan can be an electric fan, i.e., a cooling fan powered by electricity. The fan speed is directly proportional to the cooling effect of the second cooling device; within the rated speed range, the higher the fan speed, the better the cooling effect, and vice versa.

[0038] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 4 This is a hardware structure block diagram of a mobile terminal for a control method of an engine cooling system according to an embodiment of the present invention. Figure 4 As shown, a mobile terminal may include one or more ( Figure 4 Only one is shown in the diagram. A processor 202 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 204 for storing data are also shown. The mobile terminal may further include a transmission device 206 for communication functions and an input / output device 208. Those skilled in the art will understand that... Figure 4 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 4 The more or fewer components shown, or having the same Figure 4 The different configurations shown.

[0039] The memory 204 can be used to store computer programs, such as software programs of application software and modules, such as a computer program corresponding to the control method of the engine cooling system in the embodiments of the present application. The processor 202 can execute various functional applications and data processing, i.e., implement the above method, by running the computer program stored in the memory 204. The memory 204 can include a high-speed random access memory, and can further include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 204 can further include a memory remotely arranged with respect to the processor 202, which can be connected to the mobile terminal through a network. Examples of the above network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 206 is used to receive or send data via a network. The specific examples of the above network can include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 206 includes a network adapter (NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 206 can be a radio frequency (RF) module, which is used to communicate with the Internet in a wireless manner.

[0040] In the embodiments, a control method of an engine cooling system running on a mobile terminal, a computer terminal or a similar computing device is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown.

[0041] Figure 5 is a flowchart of the control method of the engine cooling system according to the embodiments of the present application. As shown in Figure 5 , the method includes the following steps:

[0042] In step S301, it is determined whether the engine cooling system works in water. In the case that the engine cooling system does not work in water, the second cooling device is controlled to work.

[0043] Specifically, the engine cooling system can be applied to an amphibious vehicle. The working process of the amphibious vehicle involves switching between land mode and water mode. The land mode is the case that the engine cooling system does not work in water.

[0044] Step S302, in the case that the engine cooling system works in water, the temperature sensor is controlled to obtain the temperature of the first cold source discharged by the engine, to obtain a first temperature;

[0045] Specifically, the water mode is the case that the engine cooling system works in water, and the detection of the first temperature can obtain the temperature of the first cold source discharged by the engine in time, to determine the working state of the engine.

[0046] Step S303, it is determined whether the first temperature is greater than a first temperature threshold, and in the case that the first temperature is less than or equal to the first temperature threshold, the first cooling device is controlled to work.

[0047] In actual application, when the amphibious vehicle runs on the shore or in a relatively dirty water area, impurities are easily sucked into the waterway system to cause blockage, resulting in a decrease in the cooling efficiency of the waterway system, or the engine compartment temperature is too high, causing the engine outlet water temperature to exceed the optimal temperature range, or even exceed the temperature limit. The first temperature threshold is the maximum value of the optimal temperature range of the engine outlet water temperature.

[0048] Step S304, in the case that the first temperature is greater than the first temperature threshold, the second cooling device and the first cooling device are controlled to work.

[0049] Specifically, when the temperature of the first cold source discharged by the engine is greater than the first temperature threshold, it indicates that the temperature of the first cold source discharged by the engine has exceeded the optimal temperature range, and only the first cooling device cannot achieve rapid cooling. Therefore, the first cooling device and the second cooling device can improve the reliability of the engine.

[0050] Through the embodiment, a control method of an engine cooling system is provided. First, it is determined whether the engine cooling system works in water, in the case that the engine cooling system does not work in water, the second cooling device is controlled to work; in the case that the engine cooling system works in water, the temperature sensor is controlled to obtain the temperature of the first cold source discharged by the engine, to obtain a first temperature; then it is determined whether the first temperature is greater than a first temperature threshold, in the case that the first temperature is less than or equal to the first temperature threshold, the first cooling device is controlled to work; finally, in the case that the first temperature is greater than the first temperature threshold, the second cooling device and the first cooling device are controlled to work. By monitoring the temperature of the first cold source discharged by the engine, in the case that the temperature is greater than the first temperature threshold, the first cooling device and the second cooling device are controlled to work at the same time, to rapidly reduce the first temperature and improve the reliability of the engine, solving the problem of reduced engine reliability in the case of impurity suction or high ambient temperature.

[0051] In the implementation process, the second cooling device is a wind cooling device, the second cooling device comprises a fan and a water tank heat dissipation device, and the step S304 can be implemented through the following steps: a first control step S3041, determining whether the first temperature is greater than or equal to a second temperature threshold, in the case that the first temperature is greater than or equal to the second temperature threshold, controlling the rotating speed of the fan to be a rated rotating speed, and outputting an alarm signal, wherein the second temperature threshold is greater than the first temperature threshold, the rated rotating speed is the maximum rotating speed of the fan, and the alarm signal is used to represent that the engine cooling system fails; and a second control step S3042, in the case that the first temperature is less than the second temperature threshold, determining a first target rotating speed according to at least the first temperature, the second temperature threshold and the rated rotating speed, and controlling the fan to operate at the first target rotating speed. Since the second temperature threshold is greater than the first temperature threshold, the method can output an alarm signal in the case that the first temperature exceeds the temperature limit value, and further give a danger prompt. Moreover, the method is started before the first temperature exceeds the second temperature threshold, reduces the risk of the engine, and further enhances the safety and reliability of the engine cooling system.

[0052] Specifically, in the case that the first temperature is greater than or equal to the second temperature threshold, it is indicated that the engine outlet water temperature has exceeded the temperature limit value, a high-temperature alarm signal is sent, and the staff is timely reminded to perform emergency treatment, and meanwhile the fan maintains the highest rotating speed, that is, the rated rotating speed, so as to as far as possible delay the speed of the water temperature continuing to rise. In the case that the first temperature is less than the second temperature threshold, it is indicated that the engine outlet water temperature does not exceed the temperature limit value, but the engine does not work in the optimal temperature range, and the fan still needs to be controlled to rotate to reduce the temperature, and the rotating speed of the fan changes with the change of the first temperature.

[0053] In order to further calculate the accurate first target rotating speed, the step S3042 can be implemented through the following steps: a step S30421, calculating the first target rotating speed n according to the formula wherein T0 is the second temperature threshold, T is the first temperature, t is a temperature margin of the fan controlling the temperature of the first cold source, the temperature margin is greater than the difference between the second temperature threshold and the first temperature threshold, and N is the rated rotating speed.

[0054] Specifically, the calculation process of the first target rotating speed is as follows: n = f x N, the first target rotating speed is a multiple of the rated rotating speed, The multiple is related to the first temperature, the second temperature threshold and the temperature margin, and the temperature margin is used to represent how to reduce the temperature by increasing the rotating speed of the fan in the case that the first temperature continuously increases.

[0055] After the step S3042, the method can be further implemented by other manners, for example: a step S3043, a third control step, controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine, to obtain a second temperature; a step S3044, a fourth control step, determining whether the second temperature is less than or equal to a predetermined difference, wherein the predetermined difference is the difference between the second temperature threshold and the temperature margin; in the case that the second temperature is less than or equal to the predetermined difference, controlling the fan to stop working; a step S3045, repeating the steps, in the case that the second temperature is greater than the predetermined difference, repeating the first control step, the second control step and the third control step at least once in sequence, and updating the first temperature in the first control step to the second temperature in the third control step obtained in the last repeating process, until the second temperature is less than or equal to the predetermined difference. The method can prevent the work of the second cooling device from failing to meet the rapid temperature reduction, and can achieve the temperature reduction through multiple works of the second cooling device.

[0056] Specifically, after the fan is controlled to operate at the first target speed, the water outlet temperature of the engine is obtained again to obtain the second temperature, and it is determined whether the difference between the second temperature threshold and the second temperature is less than the temperature margin; in the case that the difference is less than the temperature margin, the first control step, the second control step and the third control step are repeatedly cycled, and the corresponding second target speed is determined according to different second temperatures in the cycling process.

[0057] In some embodiments, the second cooling device is a wind cooling device, and the second cooling device includes a fan and a water tank heat dissipation device. The step S301 can be specifically implemented by the following steps: a step S3011, controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine, to obtain a third temperature; a step S3012, determining the speed of the fan corresponding to the third temperature as a second target speed according to the mapping relationship between the temperature of the first cold source and the speed of the fan and the third temperature; a step S3013, controlling the fan to operate at the second target speed. The method can further quickly determine the second target speed.

[0058] In practical applications, the mapping relationship between the temperature of the first cold source and the speed of the fan can be a mapping table, which is used to represent different speeds of the fan corresponding to different temperatures of the first cold source. The corresponding second target speed can be quickly determined by the table lookup manner.

[0059] In order for those skilled in the art to more clearly understand the technical solutions of the present application, the implementation process of the engine cooling system control method of the present application will be described in detail below in conjunction with specific embodiments.

[0060] The present embodiment relates to a specific engine cooling system control method, which is applied to amphibious vehicles, such as Figure 6 As shown, the method comprises the following steps:

[0061] Step S1: Determine whether the amphibious vehicle is in water running mode. If yes, execute step S2, otherwise execute step S3;

[0062] Step S2: Detect the engine outlet water temperature T, which is the temperature of the cold source discharged by the engine detected by the temperature sensor;

[0063] Step S3: The amphibious vehicle is in land running mode. Find the relationship table MAP of the engine outlet water temperature and the fan speed to determine the speed of the fan, and control the fan in the air cooling device to run at the speed;

[0064] Step S4: Determine whether T>T2. If yes, execute step S5, otherwise end;

[0065] Step S5: Determine whether T≥T0. If yes, execute step S6, otherwise execute step S7, wherein T0>T2;

[0066] Step S6: Issue a high water temperature fault alarm, and control the fan speed n to be N, wherein N is the rated speed;

[0067] Step S7: Control the electronic fan to start, and control the fan speed n to be f×N, wherein

[0068] Step S8: Determine whether T≤T0-t. If yes, turn off the electronic fan, otherwise execute step S5, wherein t is the temperature margin of the fan controlling the engine outlet water temperature.

[0069] The present application also provides an engine cooling system controller. It should be noted that the engine cooling system controller of the present application can be used to execute the engine cooling system control method provided by the present application. The device is used to implement the above embodiments and preferred embodiments, and will not be described again. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware is also possible and contemplated.

[0070] The controller of the engine cooling system provided by the embodiment of the present application is introduced as follows.

[0071] Figure 7 is a schematic diagram of the controller of the engine cooling system according to the embodiment of the present application. As shown in the figure, the device comprises: Figure 7

[0072] The first control unit 11 is configured to determine whether the engine cooling system is working in water, and control the second cooling device to work in the case that the engine cooling system is not working in water.

[0073] Specifically, the engine cooling system can be applied to an amphibious vehicle, and the working process of the amphibious vehicle involves switching between land mode and water mode. The land mode is the case that the engine cooling system is not working in water.

[0074] The second control unit 12 is configured to control the temperature sensor to obtain the temperature of the first cooling source discharged by the engine in the case that the engine cooling system is working in water, to obtain a first temperature.

[0075] Specifically, the water mode is the case that the engine cooling system is working in water, and the detection of the first temperature can obtain the temperature of the first cooling source discharged by the engine in time, to determine the working state of the engine.

[0076] The third control unit 13 is configured to determine whether the first temperature is greater than a first temperature threshold, and control the first cooling device to work in the case that the first temperature is less than or equal to the first temperature threshold.

[0077] In actual application, when the amphibious vehicle is running on the shore or in a relatively dirty water area, impurities are easily sucked into the waterway system to cause blockage, resulting in a decrease in the cooling efficiency of the waterway system, or the engine cooling water temperature exceeds the optimal temperature range or even exceeds the temperature limit value due to the high temperature of the engine compartment. The first temperature threshold is the maximum value of the optimal temperature range of the engine cooling water temperature.

[0078] The fourth control unit 14 is configured to control the second cooling device and the first cooling device to work in the case that the first temperature is greater than the first temperature threshold.

[0079] Specifically, when the temperature of the first cooling source discharged by the engine is greater than the first temperature threshold, it indicates that the temperature of the first cooling source discharged by the engine has exceeded the optimal temperature range, and only the first cooling device cannot realize rapid cooling. Therefore, the first cooling device and the second cooling device can improve the reliability of the engine.

[0080] ​The embodiment provides a controller of an engine cooling system, a first control unit determines whether the engine cooling system works in water, and controls a second cooling device to work in the case that the engine cooling system does not work in water; a second control unit controls a temperature sensor to obtain a temperature of a first cold source discharged by an engine and obtain a first temperature in the case that the engine cooling system works in water; a third control unit determines whether the first temperature is greater than a first temperature threshold, and controls a first cooling device to work in the case that the first temperature is less than or equal to the first temperature threshold; and a fourth control unit controls the second cooling device and the first cooling device to work in the case that the first temperature is greater than the first temperature threshold. The temperature of the first cold source discharged by the engine is monitored, the first cooling device and the second cooling device are controlled to work simultaneously in the case that the temperature is greater than the first temperature threshold, the first temperature is rapidly reduced, and the reliability of the engine is improved, and the problem that the reliability of the engine is reduced in the case that impurities are inhaled or the ambient temperature is too high is solved.

[0081] In the implementation process, the second cooling device is a wind cooling device, the second cooling device comprises a fan and a water tank heat dissipation device, the fourth control unit comprises a first control module and a second control module, the first control module is used for the first control step, determines whether the first temperature is greater than or equal to a second temperature threshold, controls the rotating speed of the fan to be a rated rotating speed in the case that the first temperature is greater than or equal to the second temperature threshold, and outputs an alarm signal, the second temperature threshold is greater than the first temperature threshold, the rated rotating speed is the maximum rotating speed of the fan, and the alarm signal is used for representing that the engine cooling system is faulty; and the second control module is used for the second control step, determines a first target rotating speed according to at least the first temperature, the second temperature threshold and the rated rotating speed in the case that the first temperature is less than the second temperature threshold, and controls the fan to run at the first target rotating speed. Since the second temperature threshold is greater than the first temperature threshold, the device can output the alarm signal in the case that the first temperature exceeds the temperature limit value, and further gives a danger prompt. Moreover, the method is started before the first temperature exceeds the second temperature threshold, the risk of the engine is reduced, and the safety and reliability of the engine cooling system are further enhanced.

[0082] Specifically, in the case that the first temperature is greater than or equal to the second temperature threshold, it indicates that the engine outlet water temperature has exceeded the temperature limit value, a high temperature warning signal is sent out to timely remind the staff to take emergency measures, and the fan maintains the highest speed, i.e., the rated speed, to slow down the speed of the water temperature rising as much as possible. In the case that the first temperature is less than the second temperature threshold, it indicates that the engine outlet water temperature has not exceeded the temperature limit value, but the engine is not working in the optimal temperature range, and the fan rotation needs to be controlled to reduce the temperature, and the speed of the fan changes with the change of the first temperature.

[0083] In order to further calculate the accurate first target speed, the second control module is further configured to calculate the first target speed n according to the formula wherein T0 is the second temperature threshold, T is the first temperature, t is the temperature margin of the fan controlling the temperature of the first cold source, the temperature margin is greater than the difference between the second temperature threshold and the first temperature threshold, and N is the rated speed.

[0084] Specifically, the calculation process of the first target speed is as follows: n = f x N, the first target speed is a multiple of the rated speed, The multiple is related to the first temperature, the second temperature threshold, and the temperature margin, which is used to represent how to reduce the temperature by increasing the speed of the fan when the first temperature is continuously increasing.

[0085] The fourth control unit further comprises a third control module, a fourth control module, and a repeating module, wherein the third control module is configured to control the temperature sensor to obtain the temperature of the first cold source discharged by the engine to obtain the second temperature in the third control step; the fourth control module is configured to determine whether the second temperature is less than or equal to a predetermined difference value in the fourth control step, and control the fan to stop working in the case that the second temperature is less than or equal to the predetermined difference value, wherein the predetermined difference value is the difference between the second temperature threshold and the temperature margin; and the repeating module is configured to repeat the first control step, the second control step, and the third control step at least once in the case that the second temperature is greater than the predetermined difference value, and update the first temperature in the first control step to the second temperature in the third control step obtained in the last repeating process during the repeating process, until the second temperature is less than or equal to the predetermined difference value. The device can prevent the work of the second temperature reduction device from failing to meet the rapid temperature reduction, and can realize the temperature reduction through multiple works of the second temperature reduction device.

[0086] Specifically, after the fan is controlled to operate at the first target rotating speed, the water outlet temperature of the engine is obtained again to obtain the second temperature, and it is determined whether the difference between the second temperature threshold and the second temperature is less than the temperature margin, and in the case of less than the temperature margin, the first control step, the second control step and the third control step are repeatedly cycled, and the corresponding second target rotating speed is determined according to the different second temperatures in the process of cycling.

[0087] In some embodiments, the second cooling device is a wind cooling device, the second cooling device comprises a fan and a water tank cooling device, and the first control unit comprises a fifth control module, a determination module and a sixth determination module, wherein the fifth control module is configured to control the temperature sensor to obtain the temperature of the first cold source discharged by the engine to obtain a third temperature; the determination module is configured to determine the rotating speed of the fan corresponding to the third temperature as the second target rotating speed according to the mapping relationship between the temperature of the first cold source and the rotating speed of the fan and the third temperature; and the sixth determination module is configured to control the fan to operate at the second target rotating speed. The device can further quickly determine the second target rotating speed.

[0088] In practical applications, the mapping relationship between the temperature of the first cold source and the rotating speed of the fan can be a mapping table, which is used to represent different rotating speeds of the fan corresponding to different temperatures of the first cold source. The corresponding second target rotating speed can be quickly determined by the table lookup method.

[0089] The controller of the engine cooling system comprises a processor and a memory, and the first control unit, the second control unit, the third control unit and the fourth control unit are all stored in the memory as program units, and the corresponding functions are realized by the processor executing the program units stored in the memory. The modules are all located in the same processor, or the modules are located in different processors in any combination.

[0090] The processor contains a core, and the core retrieves the corresponding program unit from the memory. The core can be one or more, and the engine cooling system is controlled by adjusting the core parameters.

[0091] The memory can include a non-permanent memory in a computer readable medium, a random access memory (RAM) and / or a non-volatile memory such as a read-only memory (ROM) or a flash memory (flash RAM), and the memory includes at least one memory chip.

[0092] The embodiment of the present application provides a computer readable storage medium, and the computer readable storage medium comprises a stored program, wherein when the program runs, the device where the computer readable storage medium is located executes the control method of the engine cooling system.

[0093] Specifically, the control method of the engine cooling system comprises:

[0094] Step S301, determining whether the engine cooling system works in water, and controlling the second cooling device to work in the case that the engine cooling system does not work in water.

[0095] Specifically, the engine cooling system can be applied to an amphibious vehicle, and the working process of the amphibious vehicle involves switching between land mode and water mode, and the land mode is the case that the engine cooling system does not work in water.

[0096] Step S302, in the case that the engine cooling system works in water, controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine to obtain a first temperature.

[0097] Specifically, the water mode is the case that the engine cooling system works in water, and the detection of the first temperature can obtain the temperature of the first cold source discharged by the engine in time to determine the working state of the engine.

[0098] Step S303, determining whether the first temperature is greater than a first temperature threshold, and controlling the first cooling device to work in the case that the first temperature is less than or equal to the first temperature threshold.

[0099] In actual application, when the amphibious vehicle runs on the shore or in a relatively dirty water area, impurities are easily sucked into the waterway system to cause blockage, resulting in a decrease in the cooling efficiency of the waterway system, or the engine water outlet temperature exceeds the optimal temperature range or even exceeds the temperature limit value due to the high temperature of the engine compartment. The first temperature threshold is the maximum value of the optimal temperature range of the engine water outlet temperature.

[0100] Step S304, in the case that the first temperature is greater than the first temperature threshold, controlling the second cooling device and the first cooling device to work.

[0101] Specifically, when the temperature of the first cold source discharged by the engine is greater than the first temperature threshold, it indicates that the temperature of the first cold source discharged by the engine has exceeded the optimal temperature range, and only the first cooling device works, which cannot realize rapid cooling. Therefore, the first cooling device and the second cooling device can improve the reliability of the engine.

[0102] The embodiment of the present application provides a processor, which is used for running a program, wherein the program performs the control method of the engine cooling system when running.

[0103] Specifically, the control method of the engine cooling system comprises:

[0104] Step S301, determine whether the engine cooling system works in water, in the case of the engine cooling system not working in water, control the second cooling device to work;

[0105] Specifically, the engine cooling system can be applied to an amphibious vehicle, and the working process of the amphibious vehicle involves switching between land and water modes, and the land mode is the case that the engine cooling system does not work in water.

[0106] Step S302, in the case that the engine cooling system works in water, control the temperature sensor to obtain the temperature of the first cold source discharged by the engine, and obtain the first temperature;

[0107] Specifically, the water mode is the case that the engine cooling system works in water, and the detection of the first temperature can obtain the temperature of the first cold source discharged by the engine in time, and determine the working state of the engine.

[0108] Step S303, determine whether the first temperature is greater than a first temperature threshold, in the case that the first temperature is less than or equal to the first temperature threshold, control the first cooling device to work;

[0109] In actual application, when the amphibious vehicle runs on the shore or in a relatively dirty water area, impurities are easily sucked into the waterway system to cause blockage, resulting in a decrease in the cooling efficiency of the waterway system, or the engine water outlet temperature exceeds the optimal temperature range or even exceeds the temperature limit value due to the high temperature of the engine compartment. The first temperature threshold is the maximum value of the optimal temperature range of the engine water outlet temperature.

[0110] Step S304, in the case that the first temperature is greater than the first temperature threshold, control the second cooling device and the first cooling device to work.

[0111] Specifically, when the temperature of the first cold source discharged by the engine is greater than the first temperature threshold, it indicates that the temperature of the first cold source discharged by the engine has exceeded the optimal temperature range, and only the first cooling device works, which cannot realize rapid cooling. Therefore, the first cooling device and the second cooling device can improve the reliability of the engine.

[0112] An apparatus is provided, and the apparatus includes a processor, a memory, and a program stored on the memory and executable on the processor. When the processor executes the program, at least the following steps are implemented:

[0113] Step S301, determine whether the engine cooling system works in water, in the case of the engine cooling system not working in water, control the second cooling device to work;

[0114] Step S302, in the case that the engine cooling system works in water, controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine, to obtain a first temperature;

[0115] Step S303, determining whether the first temperature is greater than a first temperature threshold, in the case that the first temperature is less than or equal to the first temperature threshold, controlling the first cooling device to work;

[0116] Step S304, in the case that the first temperature is greater than the first temperature threshold, controlling the second cooling device and the first cooling device to work.

[0117] The device herein can be a server, a PC, a PAD, a mobile phone, etc.

[0118] The application further provides a computer program product, which is suitable for executing a program of at least the following method steps when executed on a data processing device:

[0119] Step S301, determining whether the engine cooling system works in water, in the case that the engine cooling system does not work in water, controlling the second cooling device to work;

[0120] Step S302, in the case that the engine cooling system works in water, controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine, to obtain a first temperature;

[0121] Step S303, determining whether the first temperature is greater than a first temperature threshold, in the case that the first temperature is less than or equal to the first temperature threshold, controlling the first cooling device to work;

[0122] Step S304, in the case that the first temperature is greater than the first temperature threshold, controlling the second cooling device and the first cooling device to work.

[0123] Obviously, those skilled in the art should understand that the modules or steps of the application described above can be realized by general computing devices, which can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, which can be realized by program codes executable by computing devices, so that they can be stored in storage devices and executed by computing devices, and in some cases, the steps shown or described herein can be executed in different orders, or they can be manufactured into individual integrated circuit modules, or multiple modules or steps thereof can be manufactured into a single integrated circuit module. Thus, the application is not limited to any specific combination of hardware and software.

[0124] Those skilled in the art will appreciate that embodiments of the application can be readily used as software, hardware, or a combination of software and hardware. In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0125] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0126] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0127] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

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

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

[0130] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can be implemented by any method or technology to store information. The 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 technologies, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible by a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0131] It should also be noted that the terms "comprising", "including", or any other variant thereof are intended to cover non-exclusive inclusion, so that processes, methods, articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0132] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects:

[0133] 1) The engine cooling system of the present application comprises a first pumping device, an engine, a temperature sensor, a first cooling device and a second cooling device. The inlet of the first pumping device is communicated with the outlet of the second cooling device. The outlet of the first pumping device is communicated with the inlet of the engine. The first pumping device is used for pumping the first cold source to the engine. The outlet of the engine is communicated with the inlet of the first cooling device. The temperature sensor is arranged on the communication pipeline between the outlet of the engine and the inlet of the first cooling device. The outlet of the first cooling device is communicated with the inlet of the first pumping device. The outlet of the first cooling device is communicated with the inlet of the second cooling device. The temperature sensor is used for detecting the temperature of the first cold source discharged by the engine. The inlet of the first pumping device is communicated with the outlet of the second cooling device. The outlet of the first cooling device is communicated with the inlet of the first pumping device. The communication between the outlet of the first cooling device and the outlet of the second cooling device is realized. Since the first cooling device is simultaneously communicated with the inlet of the outlet of the second cooling device, the first cold source originally flowing into the second cooling device directly flows from the outlet of the first cooling device to the inlet of the first pumping device. The capacity of the first cold source flowing through the second cooling device can be reduced. The volume of the second cooling device storing the first cold source can be reduced. The volume of the engine cooling system is further reduced. The technical problem of the engine cooling system occupying too much space is solved.

[0134] 2) The control method of the engine cooling system of the present application comprises the following steps. Firstly, it is determined whether the engine cooling system works in water. In the case that the engine cooling system does not work in water, the second cooling device is controlled to work. In the case that the engine cooling system works in water, the temperature sensor is controlled to obtain the temperature of the first cold source discharged by the engine, and the first temperature is obtained. Then, it is determined whether the first temperature is greater than the first temperature threshold. In the case that the first temperature is less than or equal to the first temperature threshold, the first cooling device is controlled to work. Finally, in the case that the first temperature is greater than the first temperature threshold, the second cooling device and the first cooling device are controlled to work. The temperature of the first cold source discharged by the engine is monitored. In the case that the temperature is greater than the first temperature threshold, the first cooling device and the second cooling device are controlled to work simultaneously. The first temperature is rapidly reduced. The reliability of the engine is improved. The problem of the reliability of the engine being reduced in the case of impurities being sucked in or the environmental temperature being too high is solved.

[0135] 3), the controller of the engine cooling system of the application, the first control unit determines whether the engine cooling system works in water, and controls the second cooling device to work in the case that the engine cooling system does not work in water; the second control unit controls the temperature sensor to obtain the temperature of the first cold source discharged by the engine to obtain the first temperature in the case that the engine cooling system works in water; the third control unit determines whether the first temperature is greater than the first temperature threshold, and controls the first cooling device to work in the case that the first temperature is less than or equal to the first temperature threshold; the fourth control unit controls the second cooling device and the first cooling device to work in the case that the first temperature is greater than the first temperature threshold. By monitoring the temperature of the first cold source discharged by the engine, the first cooling device and the second cooling device are controlled to work simultaneously in the case that the temperature is greater than the first temperature threshold, the first temperature is rapidly reduced, the reliability of the engine is improved, and the problem of reduced reliability of the engine in the case of impurity suction or high ambient temperature is solved.

[0136] The above only describes the preferred embodiments of the application and is not intended to limit the application. Those skilled in the art can make various modifications and changes to the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A control method of an engine cooling system, an outlet of the engine being connected in series with a first temperature reducing device and a second temperature reducing device by a temperature sensor, characterized in that, The method comprises the following steps: determining whether the engine cooling system is working in water, and controlling the second cooling device to work in the case that the engine cooling system is not working in water; controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine to obtain a first temperature in the case that the engine cooling system is working in water; determining whether the first temperature is greater than a first temperature threshold, and controlling the first cooling device to work in the case that the first temperature is less than or equal to the first temperature threshold, wherein the first cooling device is a liquid cooling device; controlling the second cooling device and the first cooling device to work in the case that the first temperature is greater than the first temperature threshold; the second cooling device is an air cooling device, and the second cooling device comprises a fan and a water tank heat dissipation device, and the second cooling device is controlled to work in the case that the first temperature is greater than the first temperature threshold, which comprises the following steps: a first control step of determining whether the first temperature is greater than or equal to a second temperature threshold, and controlling the rotating speed of the fan to be a rated rotating speed and outputting an alarm signal in the case that the first temperature is greater than or equal to the second temperature threshold, wherein the second temperature threshold is greater than the first temperature threshold, the rated rotating speed is the maximum rotating speed of the fan, and the alarm signal is used to represent that the engine cooling system is faulty; a second control step of determining a first target rotating speed according to at least the first temperature, the second temperature threshold and the rated rotating speed, and controlling the fan to run at the first target rotating speed in the case that the first temperature is less than the second temperature threshold; the determination of the first target rotating speed according to at least the first temperature, the second temperature threshold and the rated rotating speed comprises the following steps: According to the formula the first target rotational speed n is calculated, wherein T0 is the second temperature threshold, T is the first temperature, t is a temperature margin of the temperature at which the fan controls the first cold source, the temperature margin being greater than a difference between the second temperature threshold and the first temperature threshold, and N is the rated rotational speed.

2. The method of claim 1, wherein, after the fan is controlled to run at the first target rotating speed, the method further comprises the following steps: a third control step of controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine to obtain a second temperature; a fourth control step of determining whether the second temperature is less than or equal to a predetermined difference value, and controlling the fan to stop working in the case that the second temperature is less than or equal to the predetermined difference value, wherein the predetermined difference value is the difference between the second temperature threshold and the temperature margin; repeating the first control step, the second control step and the third control step at least once in the case that the second temperature is greater than the predetermined difference value, and updating the first temperature in the first control step to the second temperature in the third control step obtained in the last repeating process in the process of repeating, until the second temperature is less than or equal to the predetermined difference value.

3. The method of claim 1, wherein, controlling the second cooling device to work in the case that the engine cooling system is not working in water comprises the following steps: controlling the temperature sensor to obtain the temperature of the first cold source discharged by the engine to obtain a third temperature; determining the rotating speed of the fan corresponding to the third temperature as a second target rotating speed according to the mapping relationship between the temperature of the first cold source and the rotating speed of the fan and the third temperature; controlling the fan to operate at the second target rotational speed.

4. An engine cooling system controlled by the control method according to any one of claims 1 to 3, characterized by The engine cooling system comprises a first pumping device, an engine, a temperature sensor, a first cooling device and a second cooling device, wherein an inlet of the first pumping device is communicated with an outlet of the second cooling device, an outlet of the first pumping device is communicated with an inlet of the engine, the first pumping device is used for pumping a first cold source to the engine, an outlet of the engine is communicated with an inlet of the first cooling device, the temperature sensor is arranged on a communication pipeline between the outlet of the engine and the inlet of the first cooling device, an outlet of the first cooling device is communicated with an inlet of the first pumping device, and the outlet of the first cooling device is communicated with an inlet of the second cooling device, the temperature sensor is used for detecting a temperature of the first cold source discharged by the engine, and the first cooling device and the second cooling device are used for reducing the temperature of the first cold source.

5. The engine cooling system of claim 4, wherein The first cooling device is a liquid cooling device, the first cooling device comprises a heat exchange device, and the engine cooling system further comprises a second pumping device, wherein an inlet of the first cooling device is an inlet of the heat exchange device, an outlet of the first cooling device is an outlet of the heat exchange device, an inlet of the second pumping device is communicated with an outside of the engine cooling system, and an outlet of the second pumping device is communicated with the heat exchange device, the second pumping device is used for pumping a second cold source located outside the engine cooling system to the heat exchange device, and the heat exchange device is used for reducing the temperature of the first cold source by using the second cold source and discharging the second cold source.

6. The engine cooling system of claim 4, wherein The second cooling device is an air cooling device, the second cooling device comprises a fan and a water tank heat dissipation device, wherein an inlet of the water tank heat dissipation device is an inlet of the second cooling device, an outlet of the water tank heat dissipation device is an outlet of the second cooling device, and the fan is located at least one side of the water tank heat dissipation device, the fan is used for sucking air and blowing the water tank heat dissipation device to reduce the temperature of the first cold source in the water tank heat dissipation device.

7. A controller for executing a control method of the engine cooling system according to any one of claims 1 to 3, characterized by The engine cooling system comprises: a first control unit, used for determining whether the engine cooling system works in water, and controlling the second cooling device to work in a case that the engine cooling system does not work in water; a second control unit, used for controlling the temperature sensor to acquire a temperature of the first cold source discharged by the engine to obtain a first temperature in a case that the engine cooling system works in water; a third control unit, used for determining whether the first temperature is greater than a first temperature threshold, and controlling the first cooling device to work in a case that the first temperature is less than or equal to the first temperature threshold; a fourth control unit, used for controlling the second cooling device and the first cooling device to work in a case that the first temperature is greater than the first temperature threshold.

8. An engine system characterized by, The engine cooling system and the controller according to any one of claims 4 to 6, the controller executing the control method of the engine cooling system according to any one of claims 1 to 3.

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