Engine cooling system and cooling control method

Abstract

An engine cooling system and a cooling control method are used for meeting the refrigeration requirements of an engine under different loads. The engine cooling system comprises a heat exchange module, a water pump, a cooling box, a thermostat, a bypass pipeline module, a control valve module and a controller. A water inlet of the heat exchange module is connected with a water outlet of the cooling box through a water pump, and a water outlet of the heat exchange module is connected with a water inlet of the cooling box through a thermostat; the first end of the bypass pipeline module is connected with a water outlet of the cooling box through the control valve module and the water pump, and the second end of the bypass pipeline module is connected with a water inlet of the water tank through the thermostat. The controller is connected with the control valve module and used for controlling opening and closing of the control valve module and adjusting the opening degree of the control valve module according to the temperature of the water outlet of the water tank.

Description

Technical Field

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

[0002] During the operation of a car, if the engine temperature is too low or too high, it will affect the performance of the car. Therefore, the engine of the car needs to be heated or cooled during driving.

[0003] The cooling of the engine in the car is mainly carried out by configuring multiple coolers in parallel to cool the engine's water tank. The multiple coolers and the connected water tank form a circulation loop, and the engine is cooled and dissipated by circulating coolant to the engine. However, the cooling capacity of the above coolers is fixed, which can meet the cooling demand of the engine under full load. However, the heat generated by the engine under different loads is different. Therefore, the existing engine cooling method cannot meet the cooling demand of the engine under different loads. Summary of the invention

[0004] The present application provides an engine cooling system and a cooling control method, which are used to meet the cooling requirements of the engine under different loads.

[0005] In a first aspect, an embodiment of the present application provides an engine cooling system, which can be connected to an engine and cool the engine by circulating cooling water. The engine cooling system includes: a heat exchange module, a water pump, a cooling box, a thermostat, a bypass pipe module, a control valve module and a controller.

[0006] Among them, the water inlet of the heat exchange module is connected to the water outlet of the cooling box through the water pump, and the water outlet of the heat exchange module is connected to the water inlet of the cooling box through the thermostat; the first end of the bypass pipe module is connected to the water outlet of the cooling box through the control valve module and the water pump, and the second end of the bypass pipe module is connected to the water inlet of the water tank through the thermostat; the controller is connected to the control valve module, and is used to control the opening and closing of the control valve module according to the temperature of the water outlet of the water tank, and adjust the opening degree of the control valve module.

[0007] With the above design, the heat exchange module can be a heat dissipation device that comes with the engine, and it can perform heat exchange and cooling on the engine. Since the heat exchange operation of the current heat exchange module can meet the cooling needs of the engine under high load conditions, when the engine is in a low load or medium load state, the heat generated by the engine is reduced, resulting in a decrease in the temperature of the coolant after heat exchange. When the coolant circulates in the engine cooling system, the temperature of the coolant at the water outlet of the engine and the cooling box will gradually decrease, and may even affect the normal operation of the engine. At this time, the controller can control the control valve module connected in series with the bypass pipeline module to open. At this time, part of the coolant does not pass through the heat exchange device for heat exchange, and thus flows directly back to the cooling box through the bypass pipeline module, thereby reducing the heat exchange of the heat exchange module, avoiding the phenomenon of the engine temperature being too low, and meeting the cooling needs of the engine under different loads.

[0008] In one possible design, the bypass pipe module includes a first bypass pipe, the control valve module includes a first control valve, the first end of the first bypass pipe is connected to the water outlet of the cooling box through the first control valve and the water pump, and the second end of the first bypass pipe is connected to the water inlet of the cooling box through the thermostat.

[0009] In one possible design, the bypass pipe module includes multiple second bypass pipes, the control valve module includes a second control valve corresponding to each second bypass pipe, the first end of each second bypass pipe is connected to the water outlet of the cooling box through the corresponding second control valve and the water pump, and the second end of each second bypass pipe is connected to the water inlet of the cooling box through the thermostat.

[0010] In a possible design, when the control valve module includes a plurality of second control valves, the controller adjusts the opening degree of the control valve module by controlling the opening number of the plurality of second control valves.

[0011] In a possible design, the engine cooling system further includes a temperature detector, which is used to detect the temperature of the water outlet of the cooling box and output the detected temperature to the controller.

[0012] In a possible implementation, the controller is specifically used to adjust the opening and closing of the control valve module and the opening degree of the control valve module according to the temperature of the cooling box water outlet and the temperature change rate of the cooling box water outlet.

[0013] In one possible design, the controller is specifically used to: when it is detected that the temperature of the cooling box water outlet is lower than the first temperature and the temperature change rate of the cooling box water outlet is lower than the set value, control the control valve module to open and be in full opening; when it is detected that the temperature of the cooling box water outlet is higher than the second temperature or the temperature change rate of the cooling box water outlet is lower than the set value, control the control valve module to close; when it is detected that the temperature of the cooling box water outlet is higher than the first temperature and lower than the second temperature, if the temperature change rate of the cooling box water outlet is lower than the set value, control the control valve module to open, and adjust the opening of the control valve module according to a pre-stored correspondence table of the set opening, the cooling box water outlet temperature and the temperature change rate.

[0014] In a second aspect, an embodiment of the present application provides a cooling control method, which can be applied to the engine refrigeration system provided in the first aspect of the present application and any possible design thereof, and is executed by a controller in the engine refrigeration system, and the cooling control method includes the following steps:

[0015] Detecting the temperature of the cooling box water outlet; controlling the opening and closing of the control valve module and adjusting the opening degree of the control valve module according to the temperature of the cooling box water outlet.

[0016] In a possible design, controlling the opening and closing of the control valve module and adjusting the opening degree of the control valve module according to the water outlet temperature of the cooling box include:

[0017] The opening and closing of the control valve module are adjusted, and the opening degree of the control valve module is adjusted according to the temperature of the cooling box water outlet and the temperature change rate of the cooling box water outlet.

[0018] In a possible design, adjusting the opening and closing of the control valve module and adjusting the opening degree of the control valve module according to the temperature of the cooling box water outlet and the temperature change rate of the cooling box water outlet includes:

[0019] When it is detected that the temperature of the cooling box water outlet is lower than the first temperature and the temperature change rate of the cooling box water outlet is lower than the set value, the control valve module is controlled to open and be in full opening; when it is detected that the temperature of the cooling box water outlet is higher than the second temperature or the temperature change rate of the cooling box water outlet is lower than the set value, the control valve module is controlled to be closed; when it is detected that the temperature of the cooling box water outlet is higher than the first temperature and lower than the second temperature, if the temperature change rate of the cooling box water outlet is lower than the set value, the control valve module is controlled to open, and the opening of the control valve module is adjusted according to a pre-stored correspondence table between the set opening and the cooling box water outlet temperature and the temperature change rate.

[0020] In addition, the technical effects brought about by the second aspect and any possible design thereof can refer to the technical effects brought about by the different designs in the first aspect of the embodiment of the present application, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of the structure of an engine cooling system provided in an embodiment of the present application Figure 1 ;

[0023] Figure 2 A schematic diagram of the structure of an engine cooling system provided in an embodiment of the present application Figure 2 ;

[0024] Figure 3 A schematic diagram of the structure of a heat exchange module provided in an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of an engine cooling system provided in an embodiment of the present application Figure 3 ;

[0026] Figure 5 A schematic diagram of the structure of an engine cooling system provided in an embodiment of the present application Figure 4 ;

[0027] Figure 6 A schematic diagram of the structure of an engine cooling system provided in an embodiment of the present application Figure 5 ;

[0028] Figure 7 A schematic flow chart of a cooling control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0030] The terms used in the implementation methods of this application are only used to explain the specific embodiments of this application, and are not intended to limit this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0031] Below, some terms in the embodiments of the present application are explained to facilitate understanding by those skilled in the art.

[0032] (1) The terms "first", "second", etc. in the embodiments of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0033] (2) The term "plurality" in the embodiments of the present application refers to two or more than two, and other quantifiers are similar.

[0034] (3) The term “connection” in the embodiments of the present application may be understood as electrical connection. The electrical connection between two electrical components may be a direct or indirect connection between the two electrical components. For example, A and B are connected, which may be either A and B directly connected or A and B indirectly connected via one or more other electrical components. For example, A and B are connected, which may be A and C directly connected, C and B directly connected, and A and B are connected via C.

[0035] The application scenarios of the engine cooling system in the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0036] The engine cooling system provided in the embodiment of the present application is applied to engines with different operating states. The engine can be located in different devices. For example, if the engine is located in a car, the engine can output mechanical energy to drive the car to move. When the car is in a moving or parked state and the car is at different speeds, the output power of the engine is different. Therefore, the heat generated during the operation of the engine is also different. If a refrigeration device with a constant refrigeration effect is used, it cannot meet the refrigeration needs of the engine under different loads.

[0037] Based on the above problems, the embodiments of the present application provide an engine cooling system and a cooling control method, which can adjust the cooling capacity to meet the cooling needs of the engine under different loads. In order to facilitate understanding of the solution for which protection is requested in the present application, an engine connected to an engine cooling device is used in a car as an example for explanation.

[0038] See also Figure 1 As shown in FIG. 1 , a schematic diagram of the structure of the engine cooling system provided in an embodiment of the present application is shown. Figure 1 As shown, the cooling system of the engine may include: a heat exchange module, a water pump, a cooling box, a thermostat, a bypass pipe module, a control valve module and a controller.

[0039] Among them, the water inlet of the heat exchange module is connected to the water outlet of the cooling box through a water pump, and the water outlet of the heat exchange module is connected to the water inlet of the cooling box through a thermostat; the first end of the bypass pipe module is connected to the water outlet of the cooling box through the control valve module and the water pump, and the second end of the bypass pipe module is connected to the water inlet of the water tank through the thermostat; the controller is connected to the control valve module, and is used to control the opening and closing of the control valve module according to the temperature of the water outlet of the water tank, and adjust the opening of the control valve module.

[0040] It should be understood that Figure 1 The engine cooling system structure shown is only an example. Depending on the cooling requirements of the equipment to which the engine belongs, the engine cooling system may have more than one Figure 1 More components shown in . Among them, Figure 1 The various components shown in the EMBODIMENTS 2000 may be implemented in hardware, software, or a combination of hardware and software, including one or more signal processing and / or application specific integrated circuits.

[0041] In actual application, the water pump can be a device commonly used in the industry that can provide power, for example, see Figure 2 , which is a schematic diagram of the structure of the engine cooling system when the water pump is a centrifugal pump. The water pump can provide power for the coolant in the cooling box, so that the coolant in the cooling box can circulate in the heat exchange module and the bypass pipe module, thereby cooling the engine.

[0042] See also Figure 3 As shown, the heat exchange module may include multiple water-cooled heat exchangers commonly used in the industry. The heat exchanger may be a cooling device provided by the engine. For example, the heat exchange module includes an exhaust gas recirculation system (EGR) cooler, an oil cooler, and an engine body. Of course, other water-cooled heat exchangers may also be used. The multiple heat exchangers are connected in parallel, and the multiple heat exchangers are connected to the water outlet of the cooling box through a water pump. The water pump may provide power so that the coolant in the cooling box circulates in the heat exchange module, thereby cooling the engine.

[0043] In actual application, the heat exchange device may have a first flow channel and a second flow channel that are isolated and can perform heat exchange. The first interface of the first flow channel can be connected to a water pump as a water inlet of the coolant, the second interface of the second flow channel can be connected to a thermostat as a water outlet of the coolant, and the second flow channel can be connected to the heat dissipation pipeline of the engine. When the engine cooling system is running, the coolant flowing out of the cooling box exchanges heat with the second flow channel when passing through the first flow channel, thereby reducing the temperature of the heat exchange medium in the second flow channel, thereby achieving the effect of reducing the engine temperature.

[0044] Continue to see Figure 3As shown, since the cooling capacity of the heat exchanger is fixed when the coolant in the heat exchange module is fixed, when the load of the engine changes, the cooling capacity of the heat exchanger in the heat exchange module cannot meet the cooling demand of the engine after the load changes. In order to meet the cooling demand of the engine and ensure the normal operation of the engine, the engine cooling system provided by the embodiment of the present application is also equipped with a bypass pipeline module, which is connected in series with the control valve module and then in parallel with the heat exchange module. When the engine is in a non-high load state, the controller can control the control valve module connected in series with the bypass pipeline module to open, and the cooling box is connected to the bypass pipeline module to form a circulation loop, and the bypass pipeline module flows through the coolant. Therefore, the flow of coolant flowing through the heat module is reduced, so as to achieve the purpose of reducing the cooling effect and avoid the problem of low temperature of the engine. In addition, the controller can also adjust the opening of the control valve module to adjust the flow of coolant flowing through the bypass pipeline module and the heat exchanger in the heat exchange module, so as to meet the cooling capacity demand of the engine under different loads.

[0045] Combined with the above description, the engine cooling system mainly adjusts the flow rate of coolant flowing through the bypass pipe module according to different load conditions of the engine to meet the cooling requirements of the engine under different loads. The following describes the process of adjusting the flow rate of coolant flowing through the bypass pipe module in combination with the structure of the bypass pipe module and the control valve module.

[0046] In a possible implementation, the bypass pipeline module includes a first bypass pipeline, the control valve module includes a first control valve, the first end of the first bypass pipeline is connected to the water outlet of the cooling box through the first control valve and the water pump, and the second end of the first bypass pipeline is connected to the water inlet of the cooling box through the thermostat. The first control valve can be a device commonly used in the industry for adjusting the flow of pipeline coolant, for example, see Figure 4 and Figure 5 The figure is a schematic diagram of the structure of the engine cooling system when the first control valve adopts a throttle valve and an electrically controlled gate valve with adjustable opening.

[0047] In one possible implementation, the bypass pipe module includes multiple second bypass pipes, the control valve module includes a second control valve corresponding to each second bypass pipe, the first end of each second bypass pipe is connected to the water outlet of the cooling box through the corresponding second control valve and the water pump, and the second end of each second bypass pipe is connected to the water inlet of the cooling box through the thermostat.

[0048] It should be noted that the second control valve can be a device commonly used in the industry that has the function of regulating the flow of coolant in the pipeline, or a device commonly used in the industry that only has the functions of opening and closing. Figure 6As shown, it is a structural schematic diagram of the engine cooling system when the second control valve adopts a device with opening and closing in the industry. At this time, the controller can adjust the opening of the control valve module by controlling the number of second control valves opened. For example, when the bypass pipeline module includes two second bypass pipelines and the control valve module includes two second control valves, if one of the second control valves is controlled to be opened and the other second control valve is closed, the opening of the control valve module is 50%. Of course, the bypass pipeline module can also include other numbers of second bypass pipelines, and the specific number of second bypass pipelines can be configured according to the application scenario and refrigeration requirements of the engine, which is not specifically limited in this application.

[0049] The following takes the engine load including high load state, low load state and medium load state as an example, combined with Figures 4 to 6 The engine cooling system structure shown in the figure provides a detailed description of the process of adjusting the cooling capacity of the engine cooling system.

[0050] In some embodiments, the temperature of the cooling box outlet can be detected to determine whether the cooling capacity of the engine cooling system meets the current load requirement of the engine. For example, when the control valve module connected in series with the bypass pipeline module is in a closed state, if the engine is in a low-load state, the temperature of the heat exchange medium that exchanges heat with the coolant in the heat exchange module is low, so the temperature of the cooling box outlet will gradually decrease. Therefore, when the cooling box outlet temperature T is less than the first temperature T, it can be determined that the engine is in a low-load state, and the control valve module connected in series with the bypass pipeline can be controlled to open to reduce the flow of coolant flowing through the heat exchange module to reduce the cooling capacity. When the control valve module connected in series with the bypass pipeline is in an open state, if the engine is switched from a low-load state to a high-load state, the temperature of the heat exchange medium that exchanges heat with the coolant in the heat exchange module is relatively high. Therefore, the temperature of the cooling box outlet will gradually rise. Therefore, when the cooling box outlet temperature T is less than or equal to the second temperature T2, it can be determined that the engine is in a high-load state, and the control valve module connected in series with the bypass pipeline can be controlled to be closed to increase the coolant flow rate flowing through the heat exchange module, thereby improving the cooling effect.

[0051] In actual application, the opening and closing method of the control valve module connected in series with the bypass pipeline is determined by only detecting the temperature of the water outlet of the cooling box. Although the refrigeration adjustment of the engine cooling system requires a certain amount of time, it is not suitable for some occasions with high refrigeration requirements. Based on this, the engine cooling system provided in the embodiment of the present application can also use the temperature change rate of the water outlet of the cooling box to control the state of the control valve module connected in series with the bypass pipeline.

[0052] When the engine is in a low-load state, the output power of the engine is low, and the corresponding heat generated is also low. If the control valve module connected in series with the bypass pipe module is closed, if all the coolant flows through the heat exchange module to cool the engine, the temperature of the coolant will drop after the heat exchange, but the drop amplitude is low, resulting in a drop in the temperature of the coolant output after passing through the cooling box, and the cooling capacity of the engine increases, which may cause the temperature of the engine to deviate from its normal operating temperature range, affecting the normal operation of the engine. Therefore, the engine load condition can be determined based on the outlet temperature of the cooling box and the temperature change rate △T of the outlet.

[0053] It should be noted that the temperature of the water outlet of the cooling box can be detected by an external temperature detector, or the engine cooling system provided in the embodiment of the present application is equipped with a temperature detector, which detects the temperature of the water outlet of the cooling box and outputs the detected temperature to the controller.

[0054] Specifically, when it is detected that the cooling box water outlet temperature T is less than the first temperature T1 and the temperature change rate ΔT of the cooling box water outlet is less than a set value, it can be determined that the engine is currently in a low load state.

[0055] Among them, the first temperature T1 can be set according to the normal operating temperature range of the engine. For example, if the normal operating temperature range of the engine is [20°, 40°], the first temperature T1 can be set to 22°. Of course, it can also be set to other values, which are not specifically limited in this application. The temperature change rate △T can be calculated by the temperature of the water tank outlet within the preset time. For example, the start time of the preset time is t1, the end time of the preset time is t2, the water tank outlet temperature collected at the start time t1 is Tt1, and the water tank outlet temperature collected at the end time t2 is Tt2, then the temperature change rate of the water tank outlet △T = (Tt1-Tt2) / (t1-t2).

[0056] Among them, detecting the temperature of the water outlet of the cooling box can be used to determine whether the current cooling capacity meets the cooling capacity demand of the engine. Detecting the temperature change rate △T of the water outlet of the cooling box can determine the temperature change trend of the water outlet of the cooling box. For example, the current water outlet temperature of the cooling box is 30°. When the water outlet temperature of the cooling box is less than 20°, it cannot meet the cooling demand of the engine. If the temperature change rate △T of the water outlet of the cooling box is detected to decrease by 1° per minute, then after 10 minutes, the cooling effect of the engine cooling system cannot meet the cooling demand of the engine. Therefore, the temperature change rate △T of the water outlet of the cooling box can be used to pre-detect the cooling capacity of the engine cooling system for prediction. Among them, the set value can be set according to the application scenario of the engine and the cooling demand of the engine, and this application does not make too many restrictions here.

[0057] In actual applications, when it is detected that the engine is in a low-load state, the controller can control the control valve module connected in series with the bypass pipe module to open, and control the control valve module connected to the bypass pipe module to be in a fully open state. At this time, part of the coolant flowing into the cooling box passes through the heat exchange module to exchange heat with the engine, and part of the coolant passes through the bypass pipe module directly back to the cooling box. Since the coolant flow in the heat exchange module for heat exchange with the engine is reduced, the cooling effect of the heat exchange module for the engine is weakened, and the temperature of the cooling box outlet and the engine temperature will gradually increase, avoiding the engine temperature from being too low, ensuring the normal operation of the engine, thereby meeting the cooling needs when the engine is in a low-load state.

[0058] When the engine is in a high-load state, the engine output power is large, and the corresponding heat generated is large. The cooling capacity of the heat exchanger in the normal heat exchange module when working alone can meet the cooling demand under high-load conditions. If the control valve module connected in series with the bypass pipeline module is opened, the temperature of the water tank will become higher and higher or the temperature will increase rapidly in a short time. Therefore, the engine load can be determined based on the outlet temperature of the cooling box and the temperature change rate △T of the outlet.

[0059] Specifically, when it is detected that the temperature T at the water outlet of the cooling box is greater than the second temperature T2, it can be determined that the engine is in a high-load state. The current temperature at the water outlet of the cooling box is still lower than the second temperature T2. Since the coolant circulation refrigeration of the engine cooling system requires a certain amount of time, if the temperature change rate △T at the water outlet of the cooling box is greater than the set value, it indicates that the current water outlet temperature of the cooling box is rising rapidly, and it can also be determined that the current engine is in a high-load state. Among them, the second temperature T2 can be set according to the normal operating temperature range of the engine. For example, if the normal operating temperature range of the engine is [20°, 40°], the second temperature T2 can be set to 38°. Of course, it can also be set to other values, which are not specifically limited in this application.

[0060] In actual applications, when it is detected that the engine is in a high-load state, the controller can control the control valve in series with the bypass pipe module to close. At this time, all the coolant flows to the heat exchange module to exchange heat with the engine. Since the coolant flow in the heat exchange module for heat exchange with the engine increases, the heat exchange module enhances the cooling effect of the engine. The temperature of the cooling box outlet and the temperature of the engine will gradually decrease, avoiding excessive engine temperature and ensuring the normal operation of the engine, thereby meeting the cooling needs of the engine under high-load conditions.

[0061] When the engine is in a medium load state, the output power of the engine is smaller than the output power in a high load state. The cooling capacity of the heat exchanger in a normal heat exchange module when working alone can meet the cooling demand under a high load state. If the control valve module in series with the bypass pipe module is closed, the temperature of the water tank will gradually decrease. Therefore, the engine load condition can be determined based on the outlet temperature T of the cooling box and the temperature change rate △T of the outlet.

[0062] Specifically, when it is detected that the water outlet temperature T of the cooling box is greater than the first temperature T1 and less than the second temperature T2, if the temperature change rate △T of the water outlet of the cooling box is less than the set value, it indicates that the water outlet temperature T of the cooling box will gradually decrease, and it can be determined that the engine is currently in a medium load state.

[0063] In actual applications, when it is detected that the engine is in a medium load state, the controller can control the control valve connected in series with the bypass pipe module to open, and adjust the opening of the control valve module according to the pre-stored correspondence table between the set opening and the cooling box outlet temperature and the temperature change rate, so as to adjust the coolant flow rate flowing through the heat exchange module and the bypass pipe module, thereby adjusting the heat exchange amount of the heat exchange module, avoiding excessive engine temperature, ensuring the normal operation of the engine, and meeting the cooling demand of the engine under medium load state.

[0064] It should be noted that the corresponding relationship table between the setting opening and the cooling box outlet temperature and the temperature change rate can be set according to the current cooling box outlet temperature T and the temperature change rate △T. For example, if the current cooling box outlet temperature T is 32° and the cooling box outlet temperature change rate △T decreases by 1° every 10 minutes, the corresponding opening can be set to 50 degrees. If the cooling box outlet temperature T is 35 degrees and the cooling box outlet temperature change rate △T decreases by 3° every 10 minutes, the corresponding opening can be set to 90 degrees. The specific values ​​can be configured according to the engine's cooling requirements and the operator's work experience, and this application will not go into detail here.

[0065] In actual application, if the control valve module is Figure 6 In the structure shown, the controller can adjust the opening of the control valve module by controlling the number of opened second control valves in the control valve module. For example, the control valve module is equipped with 10 second control valves. When the opening of the control valve module needs to be adjusted to 90, 9 of the 10 second control valves can be controlled to open and the remaining second control valve can be closed, thereby achieving the effect of adjusting the opening of the control valve module.

[0066] It should be noted that the above is an example of an engine cooling system. In actual application, the types of heat exchange devices and pumps provided in the embodiments of the present application can also adopt other devices in the industry with the above functions, which are not introduced one by one in this application.

[0067] Based on the above description, the embodiment of the present application further provides a cooling control method, which can be applied to the aforementioned engine cooling system and executed by a controller in the engine cooling system, see Figure 7 As shown, the specific steps include:

[0068] Step S701, detecting the temperature of the water outlet of the cooling box.

[0069] Step S702: Control the opening and closing of the control valve module and adjust the opening degree of the control valve module according to the water outlet temperature of the cooling box.

[0070] In a possible implementation, the opening and closing of the control valve module is controlled according to the water outlet temperature of the cooling box, and the opening degree of the control valve module is adjusted, including:

[0071] According to the temperature of the cooling box water outlet and the temperature change rate of the cooling box water outlet, the opening and closing of the control valve module are adjusted, and the opening degree of the control valve module is adjusted.

[0072] In a possible implementation, adjusting the opening and closing of the control valve module and adjusting the opening degree of the control valve module according to the temperature of the cooling box water outlet and the temperature change rate of the cooling box water outlet includes:

[0073] When it is detected that the temperature of the cooling box water outlet is lower than the first temperature and the temperature change rate of the cooling box water outlet is lower than the set value, the control valve module is controlled to open and be in full opening; when it is detected that the temperature of the cooling box water outlet is higher than the second temperature or the temperature change rate of the cooling box water outlet is lower than the set value, the control valve module is controlled to close; when it is detected that the temperature of the cooling box water outlet is higher than the first temperature and lower than the second temperature, if the temperature change rate of the cooling box water outlet is lower than the set value, the control valve module is controlled to open, and the opening of the control valve module is adjusted according to the pre-stored correspondence table between the set opening and the cooling box water outlet temperature and the temperature change rate.

[0074] It should be noted that the cooling control method uses the cooling box outlet temperature and the temperature change rate of the cooling box outlet to adjust the cooling capacity. The process can be found in the above-mentioned related introduction, and this application will not repeat it here.

[0075] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0076] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0077] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0078] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0079] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An engine cooling system, characterized in that: include: Heat exchange module, water pump, cooling box, thermostat, bypass pipe module, control valve module and controller; The water inlet of the heat exchange module is connected to the water outlet of the cooling box through the water pump, and the water outlet of the heat exchange module is connected to the water inlet of the cooling box through the thermostat; The first end of the bypass pipe module is connected to the water outlet of the cooling box through the control valve module and the water pump, and the second end of the bypass pipe module is connected to the water inlet of the water tank through the thermostat; The controller is connected to the control valve module and is used to control the opening and closing of the control valve module and adjust the opening degree of the control valve module according to the temperature of the water outlet of the water tank.

2. The system according to claim 1, characterized in that The bypass pipeline module includes a first bypass pipeline, and the control valve module includes a first control valve. The first end of the first bypass pipeline is connected to the water outlet of the cooling box through the first control valve and the water pump, and the second end of the first bypass pipeline is connected to the water inlet of the cooling box through the thermostat.

3. The system according to claim 1, characterized in that The bypass pipe module includes multiple second bypass pipes, and the control valve module includes a second control valve corresponding to each second bypass pipe one by one. The first end of each second bypass pipe is connected to the water outlet of the cooling box through the corresponding second control valve and the water pump, and the second end of each second bypass pipe is connected to the water inlet of the cooling box through the thermostat.

4. The system according to claim 3, characterized in that When the control valve module includes a plurality of second control valves, the controller adjusts the opening degree of the control valve module by controlling the opening number of the plurality of second control valves.

5. The system according to any one of claims 2 to 4, characterized in that: The engine cooling system further comprises a temperature detector, which is used to detect the temperature of the water outlet of the cooling box and output the detected temperature to the controller.

6. The system according to claim 5, characterized in that The controller is specifically used to adjust the opening and closing of the control valve module and the opening degree of the control valve module according to the temperature of the cooling box water outlet and the temperature change rate of the cooling box water outlet.

7. The system according to claim 6, characterized in that The controller is specifically used for: When it is detected that the temperature of the cooling box water outlet is lower than the first temperature and the temperature change rate of the cooling box water outlet is lower than the set value, the control valve module is controlled to open and be in full opening; When it is detected that the temperature of the cooling box water outlet is greater than the second temperature or the temperature change rate of the cooling box water outlet is less than the set value, the control valve module is controlled to close; When it is detected that the temperature of the cooling box water outlet is greater than the first temperature and less than the second temperature, if the temperature change rate of the cooling box water outlet is less than the set value, the control valve module is controlled to open, and the opening of the control valve module is adjusted according to a pre-stored correspondence table between the set opening, the cooling box water outlet temperature and the temperature change rate.

8. A cooling control method, characterized in that: Applied in the engine cooling system according to any one of claims 1 to 7, the method comprises: Detecting the water outlet temperature of the cooling box; According to the water outlet temperature of the cooling box, the opening and closing of the control valve module are controlled, and the opening degree of the control valve module is adjusted.

9. The method according to claim 8, characterized in that The controlling the opening and closing of the control valve module and adjusting the opening degree of the control valve module according to the water outlet temperature of the cooling box comprises: The opening and closing of the control valve module and the opening degree of the control valve module are adjusted according to the temperature of the cooling box water outlet and the temperature change rate of the cooling box water outlet.

10. The method according to claim 9, characterized in that The step of adjusting the opening and closing of the control valve module and the opening degree of the control valve module according to the temperature of the cooling box water outlet and the temperature change rate of the cooling box water outlet comprises: When it is detected that the temperature of the cooling box water outlet is lower than the first temperature and the temperature change rate of the cooling box water outlet is lower than the set value, the control valve module is controlled to open and be in full opening; When it is detected that the temperature of the cooling box water outlet is greater than the second temperature or the temperature change rate of the cooling box water outlet is less than the set value, the control valve module is controlled to close; When it is detected that the temperature of the cooling box water outlet is greater than the first temperature and less than the second temperature, if the temperature change rate of the cooling box water outlet is less than the set value, the control valve module is controlled to open, and the opening of the control valve module is adjusted according to a pre-stored correspondence table between the set opening, the cooling box water outlet temperature and the temperature change rate.

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