Engine cooling system and control method

Abstract

The invention relates to the technical field of engine cooling systems, in particular to an engine cooling system and a control method.The engine cooling system structurally comprises a control module, a radiator and a warm air core, the radiator and the warm air core communicate with a vehicle, and the radiator and the warm air core communicate with a main pipeline; the cylinder body upper end water jacket is communicated with the control module, and the main pipeline is communicated with the cylinder body upper end water jacket; the cylinder cover water jacket is communicated with the main pipeline; the air cylinder body lower end water jacket is communicated with the air cylinder cover water jacket and the control module; the cooling and pressurizing part is communicated with the cylinder cover water jacket and the control module; the bypass pipe is communicated with the control module and the main pipeline; and the electric water pump is communicated with the cylinder body upper end water jacket and the cylinder cover water jacket. According to the engine cooling system and the control method, the problem that an existing cooling system is difficult to accurately control parts to be at the proper temperature can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of engine cooling systems, and in particular to an engine cooling system and a control method thereof. Background Art

[0002] When an engine is operating, the gas temperature inside the cylinder can reach thousands of degrees Celsius. If heat isn't dissipated promptly, engine components, especially those in direct contact with the hot gas, will overheat and expand. This can cause changes in clearances, affecting the proper functioning of moving parts and even causing blockage or seizure. High temperatures also weaken the mechanical strength of engine components and render lubricants ineffective.

[0003] To avoid these issues and maximize engine economy, power, durability, and reliability, a proper cooling method must be employed to maintain the engine within a certain temperature range to ensure reliable and normal operation. Overcooling or undercooling the cooling system can affect engine life and fuel economy. The control module is the core component responsible for control in the cooling system. It precisely controls the flow rate required by each circuit through a series of valves based on the water temperature in each area.

[0004] To ensure engine performance and efficiency, each engine component has a target operating temperature range under different operating conditions. However, the target water temperature for each component circuit varies. Currently, existing engine cooling systems are generally divided into only a primary and secondary cooling loops, which cannot accurately control component temperatures. This results in a large temperature difference between the upper and lower water jackets of the cylinder block, making it prone to deformation. This increases the tendency for engine knock, friction losses, and reduced power and economy. Summary of the Invention

[0005] In view of this, the purpose of this application is to provide an engine cooling system and control method to solve the problem that the existing cooling system is difficult to accurately control the components at an appropriate temperature.

[0006] According to a first aspect of the present invention, an engine cooling system is provided, wherein the engine cooling system includes: a control module, respectively connected to the radiator and heater core of the vehicle, the radiator and heater core being connected to a main line; a water jacket at the upper end of a cylinder block being connected to the control module, the main line being connected to the water jacket at the upper end of the cylinder block; a water jacket at the cylinder head being connected to the main line; a water jacket at the lower end of a cylinder block being connected to the water jacket at the cylinder head, the water jacket at the lower end of the cylinder block being connected to the control module; a cooling and pressurizing part being connected to the cylinder head water jacket, the cooling and pressurizing part being connected to the control module; a bypass pipe being connected to the control module, the bypass pipe being connected to the main line; and an electric water pump being arranged in the main line, the electric water pump being connected to the water jacket at the upper end of the cylinder block and the water jacket at the cylinder head; each connecting port of the control module is provided with a valve assembly, and the control module controls the opening and closing of the connecting port through the valve assembly.

[0007] Preferably, the cooling and supercharging unit includes: an oil cooler connected to the control module, and the cylinder head water jacket is connected to the oil cooler; an EGR cooler connected to the control module, and the cylinder head water jacket is connected to the EGR cooler; and a supercharger connected to the control module, and the cylinder head water jacket is connected to the supercharger.

[0008] Preferably, the cylinder head water jacket is connected to the cylinder block lower end water jacket through the cylinder internal water channel, the engine cooling system also includes a cylinder block lower end bypass channel, the cylinder head water jacket is connected to the cylinder block lower end water jacket, and the cylinder block lower end water jacket is connected to the control module.

[0009] Preferably, a first throttle valve is provided between the water jacket at the upper end of the cylinder block and the control module, and a second throttle valve is provided between the bypass channel at the lower end of the cylinder block and the control module.

[0010] Preferably, the engine cooling system further comprises a tee pipe, and the electric water pump is connected to the water jacket at the upper end of the cylinder block and the water jacket at the cylinder head via the tee pipe.

[0011] According to a second aspect of the present invention, a control method for an engine cooling system is provided, wherein the engine cooling system is the engine cooling system as described above, and the control method for the engine cooling system includes: the control module controlling the opening and closing of the connecting port according to the coolant temperature, the oil temperature and the ambient temperature.

[0012] Preferably, when the engine of the vehicle is cold started or the coolant temperature is ≤70°C, the communication port of the control module for communicating with the upper water jacket of the cylinder block is opened, the communication port of the control module for communicating with the cylinder head water jacket is opened, the communication port of the control module for communicating with the lower water jacket of the cylinder block is opened, the communication port of the control module for communicating with the supercharger is opened, and the communication port of the control module for communicating with the bypass pipe is opened; when the coolant temperature is greater than 70°C, the communication port of the control module for communicating with the bypass pipe is closed, the communication port of the control module for communicating with the upper water jacket of the cylinder block is opened, the communication port of the control module for communicating with the lower water jacket of the cylinder block is opened, the communication port of the control module for communicating with the oil cooler is opened, the communication port of the control module for communicating with the EGR cooler is opened, the communication port of the control module for communicating with the supercharger is opened, and the communication port of the control module for communicating with the radiator is opened.

[0013] Preferably, when the user turns on the control switch as needed or the circulation loop of the vehicle has a demand, the connection port of the control module for communicating with the heater core is opened; when the ambient temperature is less than 5°C and the coolant temperature is less than 50°C or the engine of the vehicle is in a high-load condition, the connection port of the control module for communicating with the EGR cooler is closed; when the oil temperature is less than 60°C, the connection port of the control module for communicating with the oil cooler is closed.

[0014] Preferably, the first throttle valve adjusts its opening according to the temperature of the water jacket at the upper end of the cylinder block. The higher the temperature of the water jacket at the upper end of the cylinder block, the larger the opening of the first throttle valve; the second throttle valve adjusts its opening according to the temperature of the water jacket at the lower end of the cylinder block. The higher the temperature of the water jacket at the lower end of the cylinder block, the smaller the opening of the second throttle valve.

[0015] Preferably, the valve assembly at the communication port of the control module for communicating with the water jacket at the upper end of the cylinder block and the valve assembly at the communication port of the control module for communicating with the bypass channel at the lower end of the cylinder block are kept in a normally open state; the valve assembly at the communication port of the control module for communicating with the heater core, the valve assembly at the communication port of the control module for communicating with the radiator and the valve assembly at the communication port of the control module for communicating with the water jacket at the lower end of the cylinder block can be adjusted in opening degree.

[0016] The engine cooling system and control method of the present invention employ separate cooling circuits for the upper and lower water jackets of the cylinder block. These circuits control the flow rate within these circuits by temperature, significantly improving the temperature control accuracy of individual components and avoiding the problem of large temperature differences between the upper and lower water jackets of the cylinder block. Furthermore, the engine cooling system can activate different cooling circuits based on different temperatures and operating conditions, effectively resolving the difficulty of existing cooling systems in accurately controlling component temperatures.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 is a schematic diagram of an engine cooling system according to the present invention.

[0020] Figure markings: 1-water jacket at the upper end of the cylinder block; 101-first throttle valve; 2-water jacket at the lower end of the cylinder block; 20-bypass channel at the lower end of the cylinder block; 201-second throttle valve; 3-water jacket at the cylinder head; 30-water channel inside the cylinder; 4-control module; 5-cooling and supercharging part; 51-oil cooler; 52-EGR cooler; 53-supercharger; 6-electric water pump; 60-tee pipe; 7-bypass pipe; 8-radiator; 9-heater core; 10-main line. DETAILED DESCRIPTION

[0021] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0022] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0023] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements present between them.

[0024] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0025] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0026] For ease of description, spatially relative terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be located "below" or "lower" relative to the other element. Thus, the term "above" encompasses both the orientations of "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein will be interpreted accordingly.

[0027] The terms used herein are intended to describe various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form. The terms "include," "comprising," and "having" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0028] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0029] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0030] like Figure 1 As shown, according to a first aspect of the present invention, an engine cooling system is provided, which includes a control module 4, a cylinder block upper end water jacket 1, a cylinder head water jacket 3, a cylinder block lower end water jacket 2, an electric water pump 6, a bypass pipe 7 and a cooling and supercharging part 5.

[0031] In the following description, reference will be made to Figure 1 The specific structures of the above components of the engine cooling system and the connection relationships of the above components are described in detail.

[0032] like Figure 1As shown, in an embodiment, the control module 4 may be provided with multiple communication ports for connecting with other components, and valve assemblies (not shown) may be installed at these communication ports. The control module 4 can control the opening and closing of each communication port by controlling the valve assemblies, thereby regulating the communication relationships between multiple components. The control module 4 may be connected to the vehicle's radiator 8 and heater core 9 via two pipelines, respectively. The radiator 8 and heater core 9 may be connected to a main pipeline 10. The cylinder block upper water jacket 1 may be connected to the control module 4 via a pipeline, and the main pipeline 10 may be connected to the cylinder block upper water jacket 1. The cylinder head water jacket 3 may be connected to the main pipeline 10. The cylinder block lower water jacket 2 may be connected to the cylinder head water jacket 3, and the cylinder head water jacket 2 may be connected to the control module 4 via a pipeline. The vehicle is equipped with a cooling and supercharging unit 5, and the cylinder head water jacket 3 may be connected to the cooling and supercharging unit 5 via a pipeline, and the cooling and supercharging unit 5 may be connected to the control module 4 via a pipeline. The bypass pipe 7 can be connected to the control module 4, and the bypass pipe 7 can be connected to the main line 10. The electric water pump 6 is provided in the main line 10, and the electric water pump 6 is connected to the cylinder block upper end water jacket 1 and the cylinder head water jacket 3.

[0033] Preferably, Figure 1 As shown, in this embodiment, the cooling and supercharging unit 5 may include an oil cooler 51, an EGR cooler 52, and a supercharger 53. The oil cooler 51 is used to cool the engine oil. The oil cooler 51 can be connected to the control module 4 via a pipeline, and the cylinder head water jacket 3 can be connected to the oil cooler 51 via a pipeline. The EGR cooler 52 is used to cool the exhaust gas recirculation (EGR) system. The EGR cooler 52 can be connected to the control module 4 via a pipeline, and the cylinder head water jacket 3 can be connected to the EGR cooler 52. The supercharger 53 can be connected to the control module 4 via a pipeline, and the cylinder head water jacket 3 can be connected to the supercharger 53 via a pipeline.

[0034] Preferably, Figure 1 As shown, in this embodiment, the cylinder head water jacket 3 can be connected to the cylinder block lower end water jacket 2 via an internal cylinder water channel 30. In addition, the engine cooling system can further include a cylinder block lower end bypass channel 20. The cylinder head water jacket 3 can be connected to the cylinder block lower end water jacket 2, and the cylinder block lower end water jacket 2 can be connected to the control module 4. With this arrangement, the engine cooling system can indirectly adjust the flow rate of the cylinder block lower end water jacket 2 by adjusting the flow rate of the cylinder block lower end bypass channel 20. The coolant in the cylinder block lower end bypass channel 20 and the cylinder block lower end water jacket 2 is both high-temperature coolant flowing out of the cylinder head water jacket 3, thereby solving the problem of slow temperature rise of the cylinder block lower end water jacket 2.

[0035] Preferably, Figure 1 As shown, in this embodiment, a first throttle valve 101 may be provided between the cylinder block upper water jacket 1 and the control module 4 to regulate the flow rate from the cylinder block upper water jacket 1 to the control module 4. A second throttle valve 201 may be provided between the cylinder block lower bypass passage 20 and the control module 4 to regulate the flow rate from the cylinder block lower water jacket 2 to the control module 4. Simultaneously, the cylinder block lower bypass passage 20 can adjust the opening of the second throttle valve 201 based on the coolant temperature of the cylinder block lower water jacket 2 to increase the temperature rise rate of the cylinder block lower water jacket 2 and reduce fuel consumption and emissions.

[0036] In addition, the engine cooling system may further include a bypass pipe 7 and an electric water pump 6. The bypass pipe 7 may be connected to the control module 4 via a pipeline, and the bypass pipe 7 may be connected to the main line 10. The electric water pump 6 may be disposed on the main line 10, that is, the main line 10 is connected to the electric water pump 6. The electric water pump 6 may be connected to the cylinder block upper end water jacket 1 and the cylinder head water jacket 3 via a tee pipe 60.

[0037] This arrangement allows the engine cooling system to have multiple cooling circuits. During use, the vehicle can activate different cooling circuits according to different operating conditions and needs to cool multiple different components independently, thereby greatly improving the temperature control accuracy of individual components and enhancing engine efficiency.

[0038] In addition, if Figure 1 According to a second aspect of the present invention, a method for controlling an engine cooling system is provided. The engine cooling system is the engine cooling system described above. The method for controlling the engine cooling system includes: the control module 4 controls the opening and closing of the communication port according to the coolant temperature, the oil temperature, and the ambient temperature.

[0039] Preferably, Figure 1 As shown, in this embodiment, when the vehicle's engine is cold-started or the coolant temperature is ≤70°C, the control module 4's communication port for communicating with the cylinder block upper water jacket 1 is opened, the control module 4's communication port for communicating with the cylinder head water jacket 3 is opened, the control module 4's communication port for communicating with the cylinder block lower water jacket 2 is opened, the control module 4's communication port for communicating with the supercharger 53 is opened, and the control module 4's communication port for communicating with the bypass pipe 7 is opened. This configuration allows the coolant in the cylinder block upper water jacket 1, the cylinder head water jacket 3, the cylinder block lower water jacket 2, and the supercharger 53 to flow to the bypass pipe 7 and then to the main line 10, achieving coolant circulation.

[0040] Preferably, Figure 1As shown, in this embodiment, when the coolant temperature is greater than 70°C, the communication port of the control module 4 for communicating with the bypass pipe 7 is closed. The communication port of the control module 4 for communicating with the upper water jacket 1 of the cylinder block is opened, the communication port of the control module 4 for communicating with the lower water jacket 2 of the cylinder block is opened, the communication port of the control module 4 for communicating with the oil cooler 51 is opened, the communication port of the control module 4 for communicating with the EGR cooler 52 is opened, the communication port of the control module 4 for communicating with the supercharger 53 is opened, and the communication port of the control module 4 for communicating with the radiator 8 is opened. This configuration allows the coolant in the upper water jacket 1 of the cylinder block, the lower water jacket 2 of the cylinder block, the oil cooler 51, the EGR cooler 52, and the supercharger 53 to flow to the radiator 8 and then to the main line 10 to realize coolant circulation for cooling.

[0041] Further, preferably, Figure 1 As shown, in this embodiment, when the ambient temperature is less than 5°C (the ambient temperature outside the vehicle) and the coolant temperature is less than 50°C, or when the vehicle's engine is under high load, EGR no longer operates. At this time, the connection port of the control module 4 for communicating with the EGR cooler 52 can be closed to reduce the energy consumption of the electric water pump 6. When the oil temperature is less than 60°C, the connection port of the control module 4 for communicating with the oil cooler 51 can be closed to quickly increase the oil temperature and reduce engine friction losses. When the user turns on the control switch as needed (e.g., when the ambient temperature is less than 10°C), or when other circulation circuits in the vehicle have a demand, the connection port of the control module 4 for communicating with the heater core 9 is opened to supply warm air.

[0042] Preferably, Figure 1 As shown, in an embodiment, the first throttle valve 101 can adjust its opening according to the temperature of the cylinder block upper water jacket 1. Specifically, the higher the temperature of the cylinder block upper water jacket 1, the larger the opening of the first throttle valve 101, thereby increasing the heat dissipation rate of the cylinder block upper water jacket 1. The second throttle valve 201 can adjust its opening according to the temperature of the cylinder block lower water jacket 2. Specifically, the higher the temperature of the cylinder block lower water jacket 2, the smaller the opening of the second throttle valve 201, thereby increasing the heat dissipation rate of the cylinder block lower water jacket 2. This allows the cylinder block upper water jacket 1 and the cylinder block lower water jacket 2 to be maintained within an appropriate temperature range, preventing deformation.

[0043] Preferably, Figure 1As shown, in an embodiment, the multiple valve assemblies of the control module 4 may include two normally open valves, three control valves, and four on-off valves. The normally open valves remain in a normally open state, the control valves can be adjusted in opening, and the on-off valves can only have an opening and closing function. Preferably, the valve assemblies at the connection port of the control module 4 for communication with the upper cylinder water jacket 1 and the valve assemblies at the connection port of the control module 4 for communication with the lower cylinder bypass channel 20 can remain in a normally open state (i.e., they can be normally open valves). The valve assemblies at the connection port of the control module 4 for communication with the heater core 9, the valve assemblies at the connection port of the control module 4 for communication with the radiator 8, and the valve assemblies at the connection port of the control module 4 for communication with the lower cylinder water jacket 2 can be adjusted in opening (i.e., they can be control valves). The valve assemblies at the other connection ports of the control module 4 can use on-off valves to save costs.

[0044] During use, the vehicle can activate different cooling circuits based on different operating conditions and requirements to independently cool multiple components, while also reducing engine fuel consumption and emissions. Separate cooling circuits are provided for the upper and lower cylinder water jackets (1 and 2), and flow rates within these circuits are controlled by temperature. This significantly improves the temperature control accuracy of individual components and avoids the problem of large temperature differences between the upper and lower cylinder water jackets.

[0045] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. An engine cooling system, provided in a vehicle, characterized in that: The engine cooling system includes: a control module, connected to a radiator and a heater core of the vehicle, respectively, wherein the radiator and the heater core are connected to a main pipeline; The water jacket at the upper end of the cylinder block is connected to the control module, and the main pipeline is connected to the water jacket at the upper end of the cylinder block; a cylinder head water jacket, connected to the main pipe; The water jacket at the lower end of the cylinder block is connected to the water jacket of the cylinder head, and the water jacket at the lower end of the cylinder block is connected to the control module; A cooling and pressurizing unit is connected to the cylinder head water jacket, and the cooling and pressurizing unit is connected to the control module; a bypass pipe connected to the control module, the bypass pipe being connected to the main line; and an electric water pump, arranged in the main pipe, the electric water pump being connected to the water jacket at the upper end of the cylinder block and the water jacket of the cylinder head; Each communication port of the control module is provided with a valve assembly, and the control module controls the opening and closing of the communication port through the valve assembly.

2. The engine cooling system according to claim 1, characterized in that The cooling and pressurizing unit includes: an oil cooler connected to the control module, and the cylinder head water jacket is connected to the oil cooler; An EGR cooler is connected to the control module, and the cylinder head water jacket is connected to the EGR cooler; and The supercharger is connected to the control module, and the cylinder head water jacket is connected to the supercharger.

3. The engine cooling system according to claim 2, characterized in that: The cylinder head water jacket is connected to the water jacket at the lower end of the cylinder block through the internal water channel of the cylinder. The engine cooling system also includes a bypass channel at the lower end of the cylinder block. The cylinder head water jacket is connected to the water jacket at the lower end of the cylinder block, and the water jacket at the lower end of the cylinder block is connected to the control module.

4. The engine cooling system according to claim 3, characterized in that: A first throttle valve is provided between the water jacket at the upper end of the cylinder block and the control module, and a second throttle valve is provided between the bypass channel at the lower end of the cylinder block and the control module.

5. The engine cooling system according to claim 4, characterized in that: The engine cooling system further comprises a tee pipe, through which the electric water pump is connected to the water jacket at the upper end of the cylinder block and the water jacket at the cylinder head.

6. A method for controlling an engine cooling system, characterized in that: The engine cooling system is the engine cooling system according to claim 4 or 5, and the control method of the engine cooling system includes: the control module controlling the opening and closing of the communication port according to the coolant temperature, the oil temperature and the ambient temperature.

7. The control method of the engine cooling system according to claim 6, characterized in that: When the vehicle's engine is cold-started or the coolant temperature is ≤70°C, the communication port of the control module for communicating with the cylinder block upper water jacket is opened, the communication port of the control module for communicating with the cylinder head water jacket is opened, the communication port of the control module for communicating with the cylinder block lower water jacket is opened, the communication port of the control module for communicating with the supercharger is opened, and the communication port of the control module for communicating with the bypass pipe is opened; When the coolant temperature is greater than 70°C, the connecting port of the control module for communicating with the bypass pipe is closed, the connecting port of the control module for communicating with the water jacket at the upper end of the cylinder block is opened, the connecting port of the control module for communicating with the water jacket at the lower end of the cylinder block is opened, the connecting port of the control module for communicating with the oil cooler is opened, the connecting port of the control module for communicating with the EGR cooler is opened, the connecting port of the control module for communicating with the supercharger is opened, and the connecting port of the control module for communicating with the radiator is opened.

8. The control method of the engine cooling system according to claim 7, characterized in that: When the user turns on the control switch according to demand or the circulation circuit of the vehicle has demand, the communication port of the control module for communicating with the heater core is opened; When the ambient temperature is less than 5° C. and the coolant temperature is less than 50° C. or the engine of the vehicle is in a high-load operating condition, closing the communication port of the control module for communicating with the EGR cooler; When the oil temperature is less than 60° C., the communication port of the control module for communicating with the oil cooler is closed.

9. The control method of the engine cooling system according to claim 6, characterized in that: The first throttle valve adjusts its opening according to the temperature of the water jacket at the upper end of the cylinder block. The higher the temperature of the water jacket at the upper end of the cylinder block, the larger the opening of the first throttle valve; the second throttle valve adjusts its opening according to the temperature of the water jacket at the lower end of the cylinder block. The higher the temperature of the water jacket at the lower end of the cylinder block, the smaller the opening of the second throttle valve.

10. The control method of the engine cooling system according to claim 6, characterized in that: The valve assembly at the communication port of the control module for communicating with the water jacket at the upper end of the cylinder block and the valve assembly at the communication port of the control module for communicating with the bypass channel at the lower end of the cylinder block are kept in a normally open state; The valve assembly at the communication port of the control module for communicating with the heater core, the valve assembly at the communication port of the control module for communicating with the radiator, and the valve assembly at the communication port of the control module for communicating with the water jacket at the lower end of the cylinder block can be adjusted in opening.

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