Engine cooling method, device, system, vehicle and readable storage medium

Abstract

The present application discloses an engine cooling method, device, system, vehicle and readable storage medium, which relates to the field of vehicle technology and is used to reduce the engine water temperature fluctuation in a low-temperature environment while meeting the cooling effect of the engine in a high-temperature environment, and to increase the working water temperature in a low-temperature environment. The controller is applied to an engine cooling system, and the engine cooling system also includes a first water pump, a second water pump, a thermostat, a radiator, and a rehydration pot; the thermostat is configured to connect to the radiator through the second liquid outlet of the thermostat when the outlet temperature of the coolant after flowing through the engine is greater than or equal to a first threshold value; the method includes: obtaining the outlet temperature; if the outlet temperature is greater than or equal to the first threshold value and less than the second threshold value, controlling the second water pump to be in an off state; if the outlet temperature is greater than or equal to the second threshold value, controlling the second water pump to be in an operating state.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to an engine cooling method, device, system, vehicle and readable storage medium. Background Art

[0002] Running the engine at an appropriate coolant temperature not only helps reduce fuel consumption but also improves engine reliability. If the coolant temperature is too high, the engine block and cylinder head water jacket will not be adequately cooled, resulting in high exhaust temperatures and a high probability of engine detonation when running under high load.

[0003] In related technologies, to suppress knock and reduce exhaust temperatures, high-performance water pumps and coolants can be used to ensure engine reliability under extreme summer operating conditions. However, in low-temperature environments, the water pump itself consumes a lot of power. Furthermore, due to the large coolant flow rate, the radiator removes a lot of heat, and the coolant temperature generally hovers around the thermostat opening temperature. The coolant's outlet temperature after flowing through the engine fluctuates greatly, resulting in high fuel consumption. Therefore, how to achieve the desired cooling effect for the engine in high-temperature environments while reducing engine water temperature fluctuations in low-temperature environments and increasing the operating water temperature in low-temperature environments is a technical problem that needs to be solved urgently. Summary of the Invention

[0004] The purpose of the present invention is to provide an engine cooling method, device, system, vehicle and readable storage medium to solve how to reduce the engine water temperature fluctuation in low temperature environment and increase the working water temperature in low temperature environment while meeting the cooling effect of the engine in high temperature environment.

[0005] In a first aspect, an engine cooling method is provided, which is applied to a controller in an engine cooling system, wherein the engine cooling system also includes a first water pump, a second water pump, a thermostat, a radiator, and a fluid replenishing pot; the outlet of the first water pump is connected to the fluid inlet of the engine, the first fluid inlet of the first water pump is connected to the fluid outlet of the second water pump, and the second fluid inlet of the first water pump is connected to the fluid replenishing pot; the fluid inlet of the thermostat is connected to the fluid outlet of the engine, and the first fluid outlet of the thermostat is connected to the fluid replenishing pot, and the thermostat is configured to be connected to the radiator through the second fluid outlet of the thermostat when the outlet temperature of the coolant after flowing through the engine is greater than or equal to a first threshold value; the radiator is respectively connected to the inlet of the second water pump and the fluid replenishing pot; the method includes: obtaining the outlet temperature; if the outlet temperature is greater than or equal to the first threshold value and less than the second threshold value, controlling the second water pump to be in a closed state; if the outlet temperature is greater than or equal to the second threshold value, controlling the second water pump to be in a running state.

[0006] According to the above technical means, when the engine outlet temperature is greater than or equal to a first threshold and less than a second threshold, the second water pump is controlled to be in an off state. Since the thermostat is configured to communicate with the radiator through the second outlet of the thermostat when the outlet temperature of the coolant after passing through the engine is greater than or equal to the first threshold, that is, when the engine is operating at a lower temperature, the second outlet of the thermostat and the radiator are closed. This prevents the engine from overcooling due to the radiator removing heat from the engine when the engine heat generation is low, thereby significantly reducing fuel consumption. Simultaneously, when the engine outlet temperature is greater than or equal to the second threshold, the second water pump is controlled to be in an on state; that is, when the engine is operating at a higher temperature, the coolant enters the radiator from the second outlet of the thermostat. This allows a larger amount of low-temperature coolant to flow from the second water pump to the first water pump for circulating cooling of the engine. Thus, when the engine generates a lot of heat and is difficult to dissipate, the second water pump, the first water pump, and the radiator can significantly improve the cooling capacity of the cooling system, meet cooling requirements in high-temperature environments, and ensure engine reliability.

[0007] Furthermore, the second water pump is controlled to be in an operating state, including: when the outlet liquid temperature is greater than or equal to the second threshold value and less than the third threshold value, determining the target operating power of the second water pump according to the difference between the target temperature and the outlet liquid temperature; and controlling the operation of the second water pump according to the target operating power.

[0008] According to the above technical means, the target operating power of the second water pump is determined according to the difference between the target temperature and the outlet liquid temperature, so that the outlet liquid temperature of the engine can reach the required target temperature as soon as possible, thereby improving the reliability of the engine under high temperature conditions.

[0009] Further, based on the difference between the target temperature and the liquid outlet temperature, the target operating power of the second water pump is determined, including: when the difference between the target temperature and the liquid outlet temperature is greater than the maximum value of the first preset range, adjusting the current operating power of the second water pump based on the first adjustment strategy to obtain the target operating power; the operating power before adjustment by the first adjustment strategy is greater than the operating power after adjustment by the first adjustment strategy; when the difference between the target temperature and the liquid outlet temperature is less than the minimum value of the first preset range, adjusting the current operating power of the second water pump based on the second adjustment strategy to obtain the target operating power; the operating power before adjustment by the second adjustment strategy is less than the operating power after adjustment by the second adjustment strategy; when the difference between the target temperature and the liquid outlet temperature is within the first preset range, determining the current operating power of the second water pump as the target operating power.

[0010] The above technical measures can reduce the operating power of the second water pump when the outlet temperature is below the target temperature, thereby reducing heat dissipation and increasing the outlet temperature. When the outlet temperature is above the target temperature, the operating power of the second water pump is increased to increase heat dissipation and reduce the outlet temperature, allowing the outlet temperature to dynamically approach the target temperature. This balances the engine's heat dissipation with its heat generation, maintaining optimal operating conditions.

[0011] Furthermore, the target temperature is negatively correlated with the engine load.

[0012] According to the above technical means, the optimal target temperature can be dynamically determined based on different engine operating conditions, and the balance between engine heat dissipation and engine heat production can be more accurately maintained, so that the engine runs at a more appropriate temperature, which can further improve the reliability of the engine.

[0013] Furthermore, for the first adjustment strategy and the second adjustment strategy, the adjustment range of the operating power of the second water pump is negatively correlated with the load of the engine and the ambient temperature.

[0014] According to the above technical means, the adjustment range of the operating power can be dynamically adjusted according to different working conditions of the engine, so as to reach the target temperature more accurately and quickly.

[0015] Furthermore, controlling the second water pump to be in an operating state includes: controlling the second water pump to operate according to the rated operating power of the second water pump when the outlet liquid temperature is greater than or equal to a third threshold.

[0016] According to the above technical means, when the engine generates a large amount of heat, the second water pump can be maintained to operate at the rated operating power, thereby increasing the heat dissipation of the engine.

[0017] Furthermore, the third threshold is greater than the first threshold and less than the maximum temperature limit of the engine, and the difference between the maximum temperature limit and the third threshold is within a second preset range.

[0018] According to the above technical means, the heat dissipation capacity can be increased to the maximum in time before the engine reaches the maximum temperature limit, thereby avoiding abnormalities such as cylinder explosion.

[0019] Furthermore, the thermostat is also configured to: disconnect the second liquid outlet from the radiator when the liquid outlet temperature is lower than the first threshold; the method also includes: controlling the second water pump to be in an off state when the liquid outlet temperature is lower than the first threshold.

[0020] According to the above technical means, when the engine is running at a lower temperature, the second liquid outlet of the thermostat and the radiator are closed. In this way, when the engine generates less heat, the radiator can be prevented from taking away the engine heat, causing the engine to overcool, thereby greatly reducing fuel consumption.

[0021] Furthermore, the first water pump is driven by the engine, and the method further includes: when the second water pump is in an operating state, if it is detected that the engine stops running, turning off the second water pump after a preset time.

[0022] According to the above technical means, when the engine stops suddenly after running at high temperature and high load, the first water pump will stop running accordingly. The temperature at the engine is high, and this operating condition for a long time will reduce the engine life. Delaying the shutdown of the second water pump can continue to cool the engine and increase the engine life.

[0023] Furthermore, the method also includes: controlling the operation of the second water pump based on a preset operating power within a preset time period; the preset operating power is less than the rated operating power.

[0024] According to the above technical means, noise, vibration, harshness (NVH) complaints caused by the rear operation of the electronic water pump can be avoided.

[0025] In a second aspect, an engine cooling device is provided, which is a controller applied to an engine cooling system. The engine cooling system also includes a first water pump, a second water pump, a thermostat, a radiator, and a fluid replenishing pot. The outlet of the first water pump is connected to the liquid inlet of the engine, the first liquid inlet of the first water pump is connected to the liquid outlet of the second water pump, and the second liquid inlet of the first water pump is connected to the fluid replenishing pot. The liquid inlet of the thermostat is connected to the liquid outlet of the engine, and the first liquid outlet of the thermostat is connected to the fluid replenishing pot. The thermostat is configured to connect to the radiator through the second liquid outlet of the thermostat when the outlet temperature of the coolant after flowing through the engine is greater than or equal to a first threshold value. The radiator is connected to the inlet of the second water pump and the fluid replenishing pot respectively. The engine cooling device includes: an acquisition unit and a control unit; the acquisition unit is used to acquire the outlet temperature; the control unit is used to control the second water pump to be in an off state when the outlet temperature is greater than or equal to the first threshold value and less than a second threshold value; the control unit is also used to control the second water pump to be in an operating state when the outlet temperature is greater than or equal to the second threshold value.

[0026] Optionally, the control unit is specifically used to: determine the target operating power of the second water pump based on the difference between the target temperature and the liquid outlet temperature when the liquid outlet temperature is greater than or equal to the second threshold and less than the third threshold; and control the operation of the second water pump based on the target operating power.

[0027] Optionally, the control unit is specifically used to: when the difference between the target temperature and the liquid outlet temperature is greater than the maximum value of the first preset range, adjust the current operating power of the second water pump based on the first adjustment strategy to obtain the target operating power; the operating power before adjustment by the first adjustment strategy is greater than the operating power after adjustment by the first adjustment strategy; when the difference between the target temperature and the liquid outlet temperature is less than the minimum value of the first preset range, adjust the current operating power of the second water pump based on the second adjustment strategy to obtain the target operating power; the operating power before adjustment by the second adjustment strategy is less than the operating power after adjustment by the second adjustment strategy; when the difference between the target temperature and the liquid outlet temperature is within the first preset range, determine the current operating power of the second water pump as the target operating power.

[0028] Optionally, the target temperature is negatively correlated with the load of the engine.

[0029] Optionally, the control unit is further specifically configured to: when the liquid outlet temperature is greater than or equal to a third threshold value, control the operation of the second water pump according to the rated operating power of the second water pump.

[0030] Optionally, the third threshold is greater than the first threshold and less than the maximum temperature limit of the engine, and the difference between the maximum temperature limit and the third threshold is within a second preset range.

[0031] Optionally, the thermostat is further configured to: disconnect the second liquid outlet from the radiator when the liquid outlet temperature is lower than a first threshold; the control unit is further configured to: control the second water pump to be in an off state when the liquid outlet temperature is lower than the first threshold.

[0032] Optionally, the control unit is further configured to: when the second water pump is in operation, if it is detected that the engine stops running, shut down the second water pump after a preset time period.

[0033] Optionally, the control unit is further specifically used to: control the operation of the second water pump based on a preset operating power within a preset time period; the preset operating power is less than the rated operating power.

[0034] In a third aspect, an engine cooling system is provided, which includes a controller, a first water pump, a second water pump, a thermostat, a radiator, and a fluid replenishing pot; the outlet of the first water pump is connected to the fluid inlet of the engine, the first fluid inlet of the first water pump is connected to the fluid outlet of the second water pump, and the second fluid inlet of the first water pump is connected to the fluid replenishing pot; the fluid inlet of the thermostat is connected to the fluid outlet of the engine, the first fluid outlet of the thermostat is connected to the fluid replenishing pot, and the thermostat is configured to be connected to the radiator through the second fluid outlet of the thermostat when the outlet temperature of the coolant after flowing through the engine is greater than or equal to a first threshold value; the radiator is connected to the fluid inlet of the second water pump and the fluid replenishing pot, respectively; the controller is used to execute the method in the first aspect or any possible design of the first aspect.

[0035] In a fourth aspect, an engine cooling device is provided, comprising: a processor; a memory for storing processor executable instructions; the processor is configured to execute the instructions, the functions performed by the controller in the first aspect or any possible design of the first aspect.

[0036] In a fifth aspect, a vehicle is provided, comprising an engine and an engine cooling system as provided in the third aspect.

[0037] In the sixth aspect, an engine cooling device is provided, which can implement the functions performed by the controller in the above-mentioned first aspect or each possible design. The functions can be implemented through hardware, such as: in one possible design, the engine cooling device may include: a processor and a communication interface, and the processor can be used to support the engine cooling device to implement the functions involved in the above-mentioned first aspect or any possible design of the first aspect.

[0038] In another possible design, the engine cooling device may further include a memory for storing computer-executable instructions and data necessary for the engine cooling device. When the engine cooling device is in operation, the processor executes the computer-executable instructions stored in the memory to cause the engine cooling device to perform the first aspect or any possible engine cooling method of the first aspect.

[0039] In the seventh aspect, a computer-readable storage medium is provided, which may be a readable non-volatile storage medium. The computer-readable storage medium stores computer instructions or programs, which, when run on a computer, enables the computer to execute the first aspect or any possible engine cooling method of the above aspects.

[0040] In an eighth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the engine cooling method according to the first aspect or any possible design of the above aspects.

[0041] Therefore, the above technical features of this application have the following beneficial effects:

[0042] (1) When the temperature of the engine outlet liquid is greater than or equal to the first threshold and less than the second threshold, the second water pump is controlled to be in a closed state. Since the thermostat is configured to communicate with the radiator through the second outlet of the thermostat when the outlet temperature of the coolant after flowing through the engine is greater than or equal to the first threshold, that is, when the engine is running at a lower temperature, the second outlet of the thermostat and the radiator are closed. In this way, when the heat generated by the engine is small, the engine overcooling caused by the radiator taking away the heat of the engine can be avoided, thereby greatly reducing fuel consumption. At the same time, when the temperature of the engine outlet liquid is greater than or equal to the second threshold, the second water pump is controlled to be in an operating state; that is, when the engine is running at a higher temperature, the coolant enters the radiator from the second outlet of the thermostat. In this way, more low-temperature coolant can enter the first water pump from the second water pump to circulate and cool the engine. In this way, when the engine generates a lot of heat and is difficult to discharge, the heat dissipation capacity of the cooling system can be greatly improved through the second water pump, the first water pump and the radiator, meeting the cooling requirements in a high-temperature environment and ensuring the reliability of the engine.

[0043] (2) The target operating power of the second water pump can be determined based on the difference between the target temperature and the outlet temperature; thus, the outlet temperature of the engine can be made to reach the required target temperature as quickly as possible, thereby improving the reliability of the engine under high temperature conditions.

[0044] (3) When the outlet temperature is lower than the target temperature, the operating power of the second water pump can be reduced to reduce heat dissipation and increase the outlet temperature. When the outlet temperature is higher than the target temperature, the operating power of the second water pump can be increased to increase heat dissipation and reduce the outlet temperature, so that the outlet temperature dynamically approaches the target temperature, the engine heat dissipation and the engine heat generation are basically balanced, and the optimal operating condition is maintained.

[0045] (4) Based on different engine operating conditions, the optimal target temperature can be dynamically determined, and the balance between engine heat dissipation and engine heat production can be more accurately maintained, so that the engine can operate at a more appropriate temperature, which can further improve the reliability of the engine.

[0046] (5) The operating power adjustment range can be dynamically adjusted according to the different working conditions of the engine to reach the target temperature more accurately and quickly.

[0047] (6) When the engine generates a lot of heat, the second water pump can be maintained at rated operating power to increase the heat dissipation of the engine.

[0048] (7) Before the engine reaches the maximum temperature limit, the heat dissipation capacity can be increased to the maximum in time to avoid abnormalities such as cylinder explosion.

[0049] (8) When the engine is running at a lower temperature, the second outlet of the thermostat and the radiator can be closed. In this way, when the heat generated by the engine is small, the radiator can be prevented from taking away the heat of the engine, causing the engine to overcool, thereby greatly reducing fuel consumption.

[0050] (9) When the engine stops suddenly after running under high temperature and heavy load, the first water pump will stop running. The temperature of the engine is high. If this operating condition lasts for a long time, the life of the engine will be reduced. Delaying the shutdown of the second water pump can continue to cool the engine and increase its life.

[0051] (10) It can avoid NVH complaints caused by the rear operation of the electronic water pump.

[0052] It should be noted that the technical effects brought about by any implementation method in the second to eighth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0053] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0055] Figure 1 A schematic structural diagram of an engine cooling system provided in an embodiment of the present application;

[0056] Figure 2 A schematic structural diagram of another engine cooling system provided in an embodiment of the present application;

[0057] Figure 3 A schematic structural diagram of another engine cooling device provided in an embodiment of the present application;

[0058] Figure 4 A schematic flow chart of an engine cooling method provided in an embodiment of the present application;

[0059] Figure 5 A schematic flow chart of an engine cooling method provided in an embodiment of the present application;

[0060] Figure 6 A schematic structural diagram of another engine cooling device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] In order to enable ordinary people in the art to better understand the technical solutions of the present disclosure, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0062] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the embodiments of the present application as detailed in the appended claims.

[0063] It will also be understood that the term “comprising” indicates the presence of described features, integers, steps, operations, elements and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components.

[0064] It should be noted that the illustrations provided in the following embodiments are merely schematic illustrations of the basic concept of the present invention. Therefore, the illustrations only show components related to the present invention and are not drawn according to the number, shape, and size of components in actual implementation. In actual implementation, the type, quantity, and proportion of each component may be changed arbitrarily, and the component layout may also be more complex.

[0065] Running the engine at an appropriate coolant temperature not only helps reduce fuel consumption but also improves engine reliability. If the coolant temperature is too high, the engine block and cylinder head water jacket will not be adequately cooled, resulting in high exhaust temperatures and a high probability of engine detonation when running under high load.

[0066] In related technologies, to suppress knock and reduce exhaust temperatures, high-performance water pumps and coolants can be used to ensure engine reliability under extreme summer operating conditions. However, in low-temperature environments, the water pump itself consumes a lot of power. Furthermore, due to the large coolant flow rate, the radiator removes a lot of heat, and the coolant temperature generally hovers around the thermostat opening temperature. The coolant's outlet temperature after flowing through the engine fluctuates greatly, resulting in high fuel consumption. Therefore, how to achieve the desired cooling effect for the engine in high-temperature environments while reducing engine water temperature fluctuations in low-temperature environments and increasing the operating water temperature in low-temperature environments is a technical problem that needs to be solved urgently.

[0067] In view of this, an embodiment of the present application provides an engine cooling method, which is applied to a controller in an engine cooling system. The engine cooling system also includes a first water pump, a second water pump, a thermostat, a radiator, and a fluid replenishing pot; the liquid outlet of the first water pump is connected to the liquid inlet of the engine, the first liquid inlet of the first water pump is connected to the liquid outlet of the second water pump, and the second liquid inlet of the first water pump is connected to the fluid replenishing pot; the liquid inlet of the thermostat is connected to the liquid outlet of the engine, the first liquid outlet of the thermostat is connected to the fluid replenishing pot, and the thermostat is configured so that the outlet temperature of the coolant after flowing through the engine is greater than or equal to the first threshold, the second liquid outlet of the thermostat is connected to the radiator; the radiator is respectively connected to the liquid inlet of the second water pump and the refill pot; the method includes: when the engine is running at a first ambient temperature, if the outlet liquid temperature is greater than or equal to the first threshold, the second water pump is controlled to be in a closed state; the first ambient temperature is less than the second threshold; when the engine is running at a second ambient temperature, if the outlet liquid temperature is greater than or equal to the first threshold, the second water pump is controlled to be in a running state; the second ambient temperature is greater than or equal to the third threshold, and the third threshold is greater than or equal to the second threshold.

[0068] The method provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0069] It should be noted that the engine cooling system described in the embodiment of the present application is for the purpose of more clearly illustrating the technical solution of the embodiment of the present application, and does not constitute a limitation on the technical solution provided in the embodiment of the present application. A person skilled in the art will know that with the evolution of the engine cooling system and the emergence of other engine cooling systems, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

[0070] The engine cooling system provided in the embodiments of this application can be applied to a vehicle. The vehicle can be any vehicle equipped with an engine. For example, the vehicle can be a fuel-powered vehicle, a hybrid vehicle, a new energy vehicle, etc. The embodiments of this application do not limit the specific technology, quantity, or device form used in the vehicle.

[0071] Figure 1 FIG. 1 is a schematic diagram of an engine cooling system provided by an embodiment of the present application. Figure 1 As shown, the engine cooling system 10 may include a controller 11 , and may also include a first water pump 12 , a second water pump 13 , a thermostat 14 , a radiator 15 , and a rehydration pot 16 .

[0072] The liquid outlet of the first water pump 12 is connected to the liquid inlet of the engine 17, the first liquid inlet of the first water pump 12 is connected to the liquid outlet of the second water pump 13, and the second liquid inlet of the first water pump 12 is connected to the liquid infusion pot 16. For example, the first water pump 12 can be a mechanical water pump driven by the engine, and the second water pump 13 can be an electronic water pump.

[0073] Among them, the liquid inlet of the thermostat 14 is connected to the liquid outlet of the engine 17, the first liquid outlet (also called the overflow port) of the thermostat 14 is connected to the first liquid inlet of the rehydration pot 16, and the thermostat 14 is configured to be connected to the radiator 15 through the second liquid outlet of the thermostat 14 when the outlet temperature of the coolant after flowing through the engine 17 is greater than or equal to the first threshold value.

[0074] For example, the thermostat 14 may include a paraffin thermostat valve containing paraffin. When the outlet temperature of the coolant after passing through the engine 17 is greater than or equal to a first threshold, the paraffin melts and the valve of the thermostat 14 opens. When the outlet temperature of the coolant after passing through the engine 17 is less than the first threshold, the paraffin solidifies and the valve of the thermostat 14 closes.

[0075] For another example, the thermostat 14 may further include an electronic valve connected to the controller (the connection relationship is not shown in the figure). When the controller 11 determines that the outlet liquid temperature is greater than or equal to a first threshold, the electronic valve in the thermostat 14 is controlled to open; when the controller 11 determines that the outlet liquid temperature is less than the first threshold, the electronic valve in the thermostat is controlled to close.

[0076] The first liquid outlet of the radiator 15 is connected to the liquid inlet of the second water pump 13 , and the second liquid outlet of the radiator 15 is connected to the second liquid inlet of the refill pot 16 ; the second liquid outlet of the radiator 15 is also called an overflow port.

[0077] It should be noted that the controller 11 can be disposed inside the vehicle; for example, the controller 11 can be an engine controller, which can be referred to as an engine electronic control unit (ECU) in practical applications. Furthermore, the controller 11 can also be any electronic device with data processing capabilities.

[0078] In addition, different components can be connected through pipelines. For example, the pipelines can be hoses.

[0079] For example, Figure 2As shown, the engine cooling system may also include an oil cooler 18 and a heating and ventilation system 19. The engine 17 may include a cylinder block 171 and a cylinder head 172 mounted on the cylinder block 171. The cylinder head 172 may also be integrated with a water jacket 173 (e.g., an integrated exhaust manifold (IEM) water jacket). The thermostat 14 may also be provided with a thermostat seat 141 and a thermostat cover 142. After flowing through the cylinder block 171 and the cylinder head 172, the coolant converges in the thermostat seat 141. The thermostat seat 141 may be equipped with a temperature sensor 143 connected to the controller 11 to detect the outlet temperature of the coolant after it flows through the engine. The thermostat base 141 also includes a normally open branch, which connects to the inlet of the oil cooler 18 via the third outlet of the thermostat 14. It also connects to the inlet of the HVAC system 19 via the fourth outlet of the thermostat 14. The outlets of both the oil cooler 18 and the HVAC system 19 are connected to the first water pump 12. The coolant flowing through the oil cooler 18 and HVAC system 19 merges and flows directly into the first water pump 12. The thermostat base 141 also includes an overflow port. Coolant can also flow out through the overflow port of the thermostat base 141 and the overflow port of the IEM water jacket 173, merge, and flow into the refill pot 16 through the first inlet of the refill pot 16.

[0080] The oil cooler 18 is used to dissipate heat and cool the oil in the engine.

[0081] When implementing it specifically, Figure 1 or Figure 2 The controller 11 in the embodiment can be used Figure 3 The structure shown, or including Figure 3 Parts shown. Figure 3 This is a schematic diagram of the structure of an engine cooling device 200 provided in an embodiment of the present application. The engine cooling device 200 may be a controller in an engine cooling system, or the engine cooling device 200 may also be a chip or system on chip in the controller. Figure 3 As shown, the engine cooling device 200 includes a processor 201 , a communication interface 202 and a communication line 203 .

[0082] Furthermore, the engine cooling device 200 may further include a memory 204 , wherein the processor 201 , the memory 204 and the communication interface 202 may be connected via a communication line 203 .

[0083] The processor 201 is a CPU, a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The processor 201 may also be other devices with processing capabilities, such as circuits, devices, or software modules, without limitation.

[0084] The communication interface 202 is used to communicate with other devices or other communication networks. The communication interface 202 can be a module, a circuit, a communication interface or any device capable of achieving communication.

[0085] The communication line 203 is used to transmit information between the components included in the engine cooling device 200 .

[0086] The memory 204 is used to store instructions executable by the processor 201. The instructions may be computer programs.

[0087] The memory 204 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and / or instructions, a random access memory (RAM) or other type of dynamic storage device capable of storing information and / or instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), a magnetic disk storage medium, or other magnetic storage device, etc., without limitation.

[0088] It should be noted that memory 204 can exist independently of processor 201 or be integrated with processor 201. Memory 204 can be used to store instructions, program code, or data. Memory 204 can be located within or outside engine cooling device 200, without limitation. Processor 201 is configured to execute instructions stored in memory 204 to implement the engine cooling method provided in the following embodiments of this application.

[0089] In one example, the processor 201 may include one or more CPUs, for example, Figure 3 CPU0 and CPU1 in.

[0090] As an optional implementation, the engine cooling device 200 includes multiple processors, for example, Figure 3 In addition to the processor 201, a processor 205 may also be included.

[0091] It should be pointed out that Figure 3 The composition shown in the Figure 1 or Figure 2 The controller limits in Figure 3 In addition to the parts shown, Figure 1 or Figure 2 The controller may include Figure 3 More or fewer components, or combinations of certain components, or different arrangements of components.

[0092] The following combination Figure 1 The engine cooling system shown describes the engine cooling method provided in the embodiment of the present application.

[0093] Figure 4 The embodiment of the present application provides an engine cooling method, which is applied to an engine cooling device and can also be applied to a controller in an engine cooling system. The controller can be Figure 1 The controller in the controller can also be a device in the controller, such as a chip.

[0094] The present application embodiment is described by taking a controller applied to an engine cooling system as an example. Figure 4 As shown, the method includes the following S301-S303:

[0095] S301: The controller obtains the outlet liquid temperature.

[0096] The outlet temperature is the outlet temperature of the coolant after it flows through the engine.

[0097] As a possible implementation manner, the controller may obtain the outlet liquid temperature via a temperature sensor connected to the controller.

[0098] In actual application, a thermostat seat is installed at the rear end of the engine cylinder head, and the water jacket of the cylinder block and cylinder head is connected to the liquid inlet of the thermostat seat. A temperature sensor is installed on the thermostat seat, and the controller can obtain the outlet liquid temperature through this temperature sensor.

[0099] For example, combining Figure 1In the engine cooling system shown, the coolant with a lower temperature in the rehydration pot 16 can flow out from the liquid outlet of the rehydration pot 16 through the action of the first water pump 12, and after flowing through the first water pump 12 and the engine 17, the engine 17 is cooled to obtain coolant with a higher temperature, and then flows out from the liquid outlet of the engine 17. The liquid outlet of the engine 17 is provided with a thermostat 14, and a temperature sensor can be provided in the thermostat 14. The controller 11 can obtain the outlet liquid temperature through the temperature sensor in the thermostat 14.

[0100] For example, combining Figure 2 In the illustrated engine cooling system, the coolant in the refill pot 16 flows out of the liquid outlet of the refill pot 16 under the action of the first water pump 12. After flowing through the first water pump 12, it flows through the cylinder head 172 and cylinder block 171 of the engine 17, respectively, cooling the engine 17, and obtaining a coolant at a higher temperature. The coolant then converges at the liquid outlets of the cylinder head 172 and cylinder block 171. The liquid outlet of the cylinder head 172 is equipped with a thermostat seat 141, and the water jackets 173 of the cylinder block 171 and cylinder head 172 are connected to the liquid inlet of the thermostat seat 141. A temperature sensor 143 is mounted on the thermostat seat 141, and the controller can obtain the outlet liquid temperature through the temperature sensor 143.

[0101] S302: If the outlet liquid temperature is greater than or equal to the first threshold and less than the second threshold, the controller controls the second water pump to be in an off state.

[0102] The first threshold and the second threshold can be set as needed. For example, the first threshold can be 30 degrees Celsius, etc. The second threshold can be 52 degrees Celsius, 54 degrees Celsius, 56 degrees Celsius, 58 degrees Celsius, etc.

[0103] As a possible implementation, when the engine outlet liquid temperature is greater than or equal to a first threshold and less than a second threshold, the controller may send a first instruction to the second water pump via the control bus to control the second water pump to be in an off state.

[0104] It should be noted that when the liquid outlet temperature is greater than or equal to the first threshold, since the second liquid outlet of the thermostat is connected to the radiator, a small amount of refrigerant flows through the radiator and the second water pump.

[0105] For example, combining Figure 1 and Figure 2In the engine cooling system shown, if the outlet temperature is greater than or equal to a first threshold and less than a second threshold, the thermostat 14 is turned on. Under the action of the first water pump 12, the warmer refrigerant flows out of the outlet of the engine 17. After passing through the radiator 15, the warmer refrigerant dissipates heat, producing cooler refrigerant. The cooler refrigerant then flows through the refill tank 16 and the inoperative second water pump 13 before flowing to the first water pump 12.

[0106] S303: If the outlet liquid temperature is greater than or equal to the second threshold, the controller controls the second water pump to be in operation.

[0107] As a possible implementation manner, the controller may determine the target operating power of the second water pump according to the difference between the target temperature and the liquid outlet temperature, and control the second water pump to operate at the target operating power.

[0108] It should be noted that the specific description of controlling the second water pump to be in an operating state in this possible implementation method will be described in subsequent sections, and this application will not go into details here.

[0109] For example, combining Figure 1 and Figure 2 In the engine cooling system shown, if the outlet temperature exceeds a second threshold, the thermostat 14 is turned on and the second water pump 13 is operated. Under the action of the first and second water pumps 12, 13, the hotter refrigerant flows out of the engine 17 at an accelerated rate. After passing through the radiator 15, the hotter refrigerant dissipates heat, producing cooler refrigerant. The cooler refrigerant then flows through the refill tank 16 and the operating second water pump 13, respectively, before accelerating to the first water pump 12.

[0110] Based on the technical solution provided in this application, when the engine outlet temperature is greater than or equal to a first threshold and less than a second threshold, the second water pump is controlled to be in an off state. Because the thermostat is configured to communicate with the radiator through the second outlet of the thermostat when the outlet temperature of the coolant after flowing through the engine is greater than or equal to the first threshold, that is, when the engine is operating at a lower temperature, the second outlet of the thermostat and the radiator are closed. In this way, when the engine heat generation is low, the radiator can be prevented from taking away the engine heat, causing the engine to overcool, thereby greatly reducing fuel consumption. Furthermore, when the engine outlet temperature is greater than or equal to the second threshold, the second water pump is controlled to be in an on state; that is, when the engine is operating at a higher temperature, the second outlet of the thermostat is connected to the radiator. In this way, when the engine generates a lot of heat and it is difficult to dissipate it, the second water pump and the radiator can greatly improve the heat dissipation capacity of the cooling system, meet the cooling requirements in high-temperature environments, and ensure the reliability of the engine.

[0111] A possible embodiment is as follows Figure 5 As shown, in order to control the second water pump to be in an operating state, S303 in the cooling method of the present application may further specifically include the following S401-S402.

[0112] S401: When the outlet liquid temperature is greater than or equal to a second threshold value and less than a third threshold value, the controller determines a target operating power of the second water pump according to a difference between the target temperature and the outlet liquid temperature.

[0113] As a possible implementation, when the difference between the target temperature and the liquid outlet temperature is greater than the maximum value of the first preset range, the controller adjusts the current operating power of the second water pump based on the first adjustment strategy to obtain the target operating power.

[0114] For example, the first preset range may be [-3, 3].

[0115] The operating power before adjustment by the first adjustment strategy is greater than the operating power after adjustment by the first adjustment strategy.

[0116] At the same time, when the difference between the target temperature and the liquid outlet temperature is less than the minimum value of the first preset range, the controller can adjust the current operating power of the second water pump based on the second adjustment strategy to obtain the target operating power.

[0117] The operating power before adjustment by the second adjustment strategy is less than the operating power after adjustment by the second adjustment strategy.

[0118] Alternatively, when the difference between the target temperature and the liquid outlet temperature is within the first preset range, the controller may determine the current operating power of the second water pump as the target operating power.

[0119] It should be noted that the third threshold is greater than the second threshold and less than the maximum temperature limit of the engine, and the difference between the maximum temperature limit and the third threshold is within a second preset range. For example, the second preset range may be 5-10. The third threshold is greater than the second threshold.

[0120] The above target temperature can be pre-set in the controller by the operation and maintenance personnel.

[0121] In some embodiments, the target temperature may also be calculated by the controller based on the load of the engine. For example, the target temperature is negatively correlated with the load of the engine.

[0122] In some embodiments, for the first adjustment strategy and the second adjustment strategy, the adjustment range of the operating power of the second water pump is negatively correlated with the load of the engine and the ambient temperature.

[0123] That is, the reduction in the operating power of the second water pump is corrected based on the difference between the target temperature and the outlet temperature, and also according to the engine speed, load and ambient temperature.

[0124] For example, when the difference between the target temperature and the outlet temperature remains constant, the greater the engine load (or engine speed), the smaller the reduction in the second water pump's operating power. Higher ambient temperatures also reduce the reduction in the second water pump's operating power. Conversely, lower engine load and lower ambient temperatures increase the reduction in the second water pump's operating power.

[0125] Accordingly, the increase in the second water pump's operating power is adjusted based on the difference between the target temperature and the outlet temperature, as well as the engine speed, load, and ambient temperature. For example, when the difference between the target temperature and the outlet temperature remains constant, the decrease in the second water pump's operating power decreases with increasing engine load, and the decrease in the second water pump's operating power also decreases with increasing ambient temperature. Conversely, the decrease in the second water pump's operating power increases with decreasing engine load and decreasing ambient temperature.

[0126] S402: The controller controls the operation of the second water pump according to the target operating power.

[0127] Among them, different operating powers can correspond to different water pump speeds.

[0128] As one possible implementation, the second water pump can be configured with multiple power control gears, with different power control gears corresponding to different pump speeds. After determining the target operating power, the controller can send a first signal to the second water pump. The first signal can be used to trigger the second water pump to increase its own power control gear. For example, after receiving the first signal, the second water pump can increase its current power control gear by one gear (e.g., from gear 1 to gear 2).

[0129] According to the above technical means, the target operating power of the second water pump is determined according to the difference between the target temperature and the liquid outlet temperature; the engine dynamically determines the optimal target water temperature according to different operating conditions, and determines a more suitable target operating power of the second water pump, thereby maintaining the engine operating at a more suitable temperature and improving engine reliability.

[0130] In some embodiments, in order to prevent the engine from exploding, S402 in the engine cooling method provided in the embodiment of the present application may further specifically include the following S501.

[0131] S501 : When the outlet liquid temperature is greater than or equal to a third threshold, the controller controls the second water pump to operate according to the rated operating power of the second water pump.

[0132] According to the above technical means, when the engine generates a large amount of heat, the rated operating power of the second water pump can be maintained, thereby increasing the heat dissipation of the engine.

[0133] In some embodiments, the thermostat provided in the embodiment of the present application is further configured to disconnect the second liquid outlet from the radiator when the outlet liquid temperature is less than a first threshold. S303 in the engine cooling method provided in the embodiment of the present application may further specifically include the following S601.

[0134] S601: When the outlet liquid temperature is lower than a first threshold, the controller controls the second water pump to be in an off state.

[0135] As a possible implementation method, when the valve in the thermostat is an electronic valve, when the outlet liquid temperature is lower than a first threshold value, the controller controls the electronic valve to close, disconnecting the second liquid outlet of the thermostat from the radiator, and the controller controls the second water pump to be in an off state.

[0136] As another possible implementation, if the valve in the thermostat is a paraffin thermostat, paraffin is disposed within the valve, and the melting point of the paraffin is less than a first threshold. When the liquid outlet temperature falls below the first threshold, the paraffin within the valve solidifies, thereby disconnecting the second liquid outlet from the radiator. In this case, the controller turns off the second water pump.

[0137] For example, combining Figure 1 In the engine cooling system shown, if the outlet temperature is below a first threshold, thermostat 14 is closed, preventing coolant from flowing from thermostat 14 to radiator 15. First water pump 12 activates the coolant, which is at a higher temperature, to flow from the outlet of engine 17. After flowing through thermostat 14, it flows from the first outlet of thermostat 14 to refill tank 16.

[0138] For example, combining Figure 2 In the illustrated engine cooling system, if the outlet temperature is less than a first threshold, the thermostat 14 is closed, preventing coolant from flowing from the second outlet of the thermostat 14 through the radiator 15. Under the action of the first water pump 12, the higher-temperature refrigerant flows out of the outlets of the cylinder head 172 and cylinder block 171 of the engine 17. After flowing through the thermostat base 141 of the thermostat 14, it flows from the first outlet of the thermostat base 141 to the refill pot 16, from the third outlet of the thermostat base 141 to the oil cooler 18, and from the fourth outlet of the thermostat base 141 to the HVAC 19. Furthermore, the coolant flowing through the oil cooler 18 and HVAC 19 can flow to the second inlet of the first water pump 12.

[0139] According to the above technical means, when the engine is running at a lower temperature, the second liquid outlet of the thermostat is disconnected from the radiator. In this way, when the heat generation of the engine is small, the second water pump is turned off and the coolant does not pass through the radiator. This can prevent the radiator from taking away the heat of the engine and causing the engine to overcool, thereby greatly reducing fuel consumption.

[0140] In some embodiments, in order to prevent the first water pump from stopping and causing the engine temperature to rise after the engine stops suddenly after running at high temperature and high load, the engine cooling method of the present application may further specifically include the following S701.

[0141] S701: When the second water pump is in operation, if the controller detects that the engine stops running, the second water pump is turned off after a preset time.

[0142] The preset duration is less than or equal to the operating time of the electronic fan in the radiator after the engine stops running. For example, if the operating time of the electronic fan in the radiator is 3 minutes after the engine stops running, the preset duration can be 3 minutes, or 2 minutes, etc.

[0143] For example, combining Figure 1 In the engine cooling system shown, when the controller detects that the engine has stopped running, the first water pump 12 stops running. Within a preset time period after the first water pump 12 stops running, the controller controls the second water pump 13 to remain in operation, and coolant continues to flow through the first water pump 12 into the engine to cool the engine's residual heat. At the same time, the coolant in the refill pot 16 can flow out of the liquid outlet of the refill pot 16 through the action of the first water pump 12. After flowing through the first water pump 12, the engine 17, the thermostat 14, and the radiator 15, it flows to the second water pump 13 through the first liquid outlet of the radiator 15, and at the same time flows to the refill pot 16 through the second liquid outlet of the radiator 15.

[0144] According to the above technical means, when the engine is suddenly stopped after high-temperature and high-load operation, the first water pump will also stop operating. Due to the high engine temperature, prolonged operation in this condition will shorten the engine life. By controlling the second water pump to continue operating for a preset period of time, the second water pump can be delayed to continue cooling the engine, thereby extending the engine life.

[0145] In some embodiments, in order to avoid NVH complaints caused by the operation of the second water pump after the engine suddenly stops after running at high temperature and high load, the engine cooling method provided in the embodiment of the present application may further specifically include the following S801.

[0146] S801. The controller controls the second water pump to operate within a preset time period based on a preset operating power.

[0147] The preset operating power is less than the rated operating power, for example, 50% of the rated operating power, or 30% of the rated operating power.

[0148] In this way, after the engine stops running, the second water pump is controlled to operate at a lower operating power, which can avoid NVH complaints caused by the subsequent operation of the electronic water pump while being able to cool the residual heat of the engine.

[0149] The various solutions in the above embodiments of the present application can be combined under the premise that there is no contradiction.

[0150] In the embodiment of the present application, the controller can be divided into functional modules or functional units according to the above method example. For example, each functional module or functional unit can be divided according to each function, or two or more functions can be integrated into one processing module. The above-mentioned integrated module can be implemented in the form of hardware or in the form of software functional modules or functional units. Among them, the division of modules or units in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.

[0151] In the case of dividing each functional module into corresponding functional modules, Figure 6 A structural schematic diagram of an engine cooling device is shown. The engine cooling device is applied to the controller in the above-mentioned engine cooling system, and can also be a chip in the controller. The engine cooling device can be used to perform the functions related to the controller in the above-mentioned embodiment.

[0152] like Figure 6 As shown, the engine cooling device 900 may include: an acquisition unit 901 and a control unit 902; the acquisition unit 901 is used to acquire the outlet liquid temperature; the control unit 902 is used to control the second water pump to be in a closed state when the outlet liquid temperature is greater than or equal to a first threshold and less than a second threshold; the control unit 902 is also used to control the second water pump to be in a running state when the outlet liquid temperature is greater than or equal to the second threshold.

[0153] In one possible design, the control unit 902 is specifically used to: determine the target operating power of the second water pump based on the difference between the target temperature and the liquid outlet temperature when the liquid outlet temperature is greater than or equal to the second threshold and less than the third threshold; and control the operation of the second water pump based on the target operating power.

[0154] In one possible design, the control unit 902 is specifically used to: when the difference between the target temperature and the liquid outlet temperature is greater than the maximum value of the first preset range, adjust the current operating power of the second water pump based on the first adjustment strategy to obtain the target operating power; the operating power before adjustment by the first adjustment strategy is greater than the operating power after adjustment by the first adjustment strategy; when the difference between the target temperature and the liquid outlet temperature is less than the minimum value of the first preset range, adjust the current operating power of the second water pump based on the second adjustment strategy to obtain the target operating power; the operating power before adjustment by the second adjustment strategy is less than the operating power after adjustment by the second adjustment strategy; when the difference between the target temperature and the liquid outlet temperature is within the first preset range, determine the current operating power of the second water pump as the target operating power.

[0155] In one possible design, the target temperature is inversely related to the engine load.

[0156] In one possible design, the control unit 902 is further specifically used to: when the liquid outlet temperature is greater than or equal to a third threshold value, control the operation of the second water pump according to the rated operating power of the second water pump.

[0157] In a possible design, the third threshold is greater than the first threshold and less than the maximum temperature limit of the engine, and the difference between the maximum temperature limit and the third threshold is within a second preset range.

[0158] In one possible design, the thermostat is also configured to: disconnect the second liquid outlet from the radiator when the liquid outlet temperature is lower than the first threshold; the control unit 902 is specifically used to: control the second water pump to be in an off state when the liquid outlet temperature is lower than the first threshold.

[0159] In one possible design, the control unit 902 is further specifically configured to: when the second water pump is in operation, if it is detected that the engine stops running, then the second water pump is turned off after a preset time period.

[0160] In one possible design, the control unit 902 is further specifically used to: control the operation of the second water pump based on a preset operating power within a preset time period; the preset operating power is less than the rated operating power.

[0161] Embodiments of the present application also provide a computer-readable storage medium. All or part of the processes in the aforementioned method embodiments can be performed by a computer program instructing the relevant hardware. This program can be stored in the aforementioned computer-readable storage medium. When executed, the program can include the processes described in the aforementioned method embodiments. The computer-readable storage medium can be an internal storage unit of the engine cooling device or controller (including the data transmitter and / or receiver) in any of the aforementioned embodiments, such as the engine cooling device's hard drive or memory.

[0162] The computer-readable storage medium may also be an external storage device of the terminal device, such as a plug-in hard drive, smart media card (SMC), secure digital (SD) card, or flash memory card. Furthermore, the computer-readable storage medium may include both the internal storage unit of the engine cooling device and an external storage device. The computer-readable storage medium is used to store the computer program and other programs and data required by the engine cooling device. The computer-readable storage medium may also be used to temporarily store data that has been output or is about to be output.

[0163] An embodiment of the present application also provides a vehicle, including an engine and an engine cooling system, a controller or an engine cooling device as involved in the above method embodiment.

[0164] In addition, the actions and terms involved in the various embodiments of this application can refer to each other without limitation. The message names or parameter names in the messages exchanged between the various devices in the embodiments of this application are only examples, and other names can also be used in specific implementations without limitation.

[0165] It should be noted that the terms "first" and "second" in the specification, claims, and drawings of this application are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0166] It should be understood that, in this application, "at least one (item)" means one or more, "more than one" means two or more, "at least two (items)" means two or three or more, and "and / or" is used to describe the association relationship between related objects, indicating that three relationships can exist. For example, "A and / or B" can mean: only A exists, only B exists, and both A and B exist, where A and B can be singular or plural. The character " / " generally indicates that the related objects are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, and c can be single or plural.

[0167] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0168] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0169] The units described as separate components may or may not be physically separate, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0170] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0171] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions for enabling a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program code, such as a USB flash drive, a mobile hard drive, ROM, RAM, a magnetic disk, or an optical disk.

[0172] The above is only a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An engine cooling method, characterized in that: A controller used in an engine cooling system, the engine cooling system also including a first water pump, a second water pump, a thermostat, a radiator, a rehydration pot, an oil cooler, and a heating and ventilation system; The liquid outlet of the first water pump is connected to the liquid inlet of the engine, the first liquid inlet of the first water pump is connected to the liquid outlet of the second water pump, and the second liquid inlet of the first water pump is connected to the liquid replenishing pot; The liquid inlet of the thermostat is communicated with the liquid outlet of the engine, the first liquid outlet of the thermostat is communicated with the rehydration pot, the thermostat is configured to communicate with the radiator through the second liquid outlet of the thermostat when the outlet temperature of the coolant after flowing through the engine is greater than or equal to a first threshold value, the third liquid outlet of the thermostat is communicated with the inlet of the oil cooler, the fourth liquid outlet of the thermostat is communicated with the inlet of the HVAC, and the outlet of the oil cooler and the outlet of the HVAC are both communicated with the first water pump; The radiator is communicated with the liquid inlet of the second water pump and the liquid replenishing pot respectively; The method comprises: obtaining the liquid outlet temperature; If the outlet temperature is lower than the first threshold, the thermostat is controlled to be in a closed state so that the coolant flows from the third outlet of the thermostat to the oil cooler, and the coolant flows from the fourth outlet of the thermostat to the HVAC; If the outlet liquid temperature is greater than or equal to the first threshold and less than a second threshold, the second water pump is controlled to be in an off state; If the liquid outlet temperature is greater than or equal to the second threshold, the second water pump is controlled to be in an operating state.

2. The method according to claim 1, characterized in that Controlling the second water pump to be in an operating state includes: When the outlet liquid temperature is greater than or equal to the second threshold value and less than a third threshold value, determining the target operating power of the second water pump according to the difference between the target temperature and the outlet liquid temperature; The second water pump is controlled to operate according to the target operating power.

3. The method according to claim 2, characterized in that Determining the target operating power of the second water pump according to the difference between the target temperature and the liquid outlet temperature includes: When the difference between the target temperature and the liquid outlet temperature is greater than the maximum value of the first preset range, adjusting the current operating power of the second water pump based on the first adjustment strategy to obtain the target operating power; the operating power before adjustment by the first adjustment strategy is greater than the operating power after adjustment by the first adjustment strategy; When the difference between the target temperature and the liquid outlet temperature is less than the minimum value of the first preset range, adjusting the current operating power of the second water pump based on the second adjustment strategy to obtain the target operating power; the operating power before adjustment by the second adjustment strategy is less than the operating power after adjustment by the second adjustment strategy; When the difference between the target temperature and the liquid outlet temperature is within the first preset range, the current operating power of the second water pump is determined as the target operating power.

4. The method according to claim 3, characterized in that The target temperature is negatively correlated with the load of the engine.

5. The method according to claim 3, characterized in that With respect to the first adjustment strategy and the second adjustment strategy, the adjustment range of the operating power of the second water pump is negatively correlated with the load of the engine and the ambient temperature.

6. The method according to claim 1, wherein Controlling the second water pump to be in an operating state includes: When the liquid outlet temperature is greater than or equal to a third threshold, the second water pump is controlled to operate according to the rated operating power of the second water pump; and the third threshold is greater than the second threshold.

7. The method according to any one of claims 2 to 6, characterized in that The third threshold is greater than the first threshold and less than a maximum temperature limit of the engine, and a difference between the maximum temperature limit and the third threshold is within a second preset range.

8. The method according to claim 1, characterized in that The thermostat is further configured to: disconnect the second liquid outlet from the radiator when the liquid outlet temperature is lower than the first threshold; The method further comprises: When the liquid outlet temperature is lower than the first threshold, the second water pump is controlled to be in an off state.

9. The method according to claim 1, characterized in that The first water pump is driven by the engine, and the method further includes: When the second water pump is in operation, if it is detected that the engine stops running, the second water pump is turned off after a preset time.

10. The method according to claim 9, characterized in that The method further comprises: During the preset time period, the second water pump is controlled to operate based on a preset operating power; the preset operating power is less than the rated operating power.

11. An engine cooling device, characterized in that: A controller used in an engine cooling system, the engine cooling system also including a first water pump, a second water pump, a thermostat, a radiator, a rehydration pot, an oil cooler, and a heating and ventilation system; The liquid outlet of the first water pump is connected to the liquid inlet of the engine, the first liquid inlet of the first water pump is connected to the liquid outlet of the second water pump, and the second liquid inlet of the first water pump is connected to the liquid replenishing pot; The liquid inlet of the thermostat is communicated with the liquid outlet of the engine, the first liquid outlet of the thermostat is communicated with the rehydration pot, the thermostat is configured to communicate with the radiator through the second liquid outlet of the thermostat when the outlet temperature of the coolant after flowing through the engine is greater than or equal to a first threshold value, the third liquid outlet of the thermostat is communicated with the inlet of the oil cooler, the fourth liquid outlet of the thermostat is communicated with the inlet of the HVAC, and the outlet of the oil cooler and the outlet of the HVAC are both communicated with the first water pump; The radiator is communicated with the liquid inlet of the second water pump and the liquid replenishing pot respectively; The device comprises: an acquisition unit and a control unit; The acquisition unit is used to acquire the liquid outlet temperature; the control unit is configured to control the thermostat to be in a closed state if the liquid outlet temperature is less than the first threshold value, so that the coolant flows from the third liquid outlet of the thermostat to the oil cooler, and flows from the fourth liquid outlet of the thermostat to the HVAC; The control unit is further configured to control the second water pump to be in an off state when the outlet liquid temperature is greater than or equal to the first threshold and less than a second threshold; The control unit is further configured to control the second water pump to be in operation when the liquid outlet temperature is greater than or equal to the second threshold.

12. An engine cooling system, characterized in that: The engine cooling system includes a controller, a first water pump, a second water pump, a thermostat, a radiator, a rehydration pot, an oil cooler, and a heating and ventilation system; The liquid outlet of the first water pump is connected to the liquid inlet of the engine, the first liquid inlet of the first water pump is connected to the liquid outlet of the second water pump, and the second liquid inlet of the first water pump is connected to the liquid replenishing pot; The liquid inlet of the thermostat is communicated with the liquid outlet of the engine, the first liquid outlet of the thermostat is communicated with the rehydration pot, the thermostat is configured to communicate with the radiator through the second liquid outlet of the thermostat when the outlet temperature of the coolant after flowing through the engine is greater than or equal to a first threshold value, the third liquid outlet of the thermostat is communicated with the inlet of the oil cooler, the fourth liquid outlet of the thermostat is communicated with the inlet of the HVAC, and the outlet of the oil cooler and the outlet of the HVAC are both communicated with the first water pump; The radiator is communicated with the liquid inlet of the second water pump and the liquid replenishing pot respectively; The controller is configured to execute the method according to any one of claims 1 to 10.

13. An engine cooling device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method according to any one of claims 1 to 10.

14. A vehicle, characterized in that: The invention comprises an engine and the engine cooling system as claimed in claim 12 .

15. A computer-readable storage medium, characterized in that When the computer-executable instructions stored in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can perform the method according to any one of claims 1 to 10.

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