An engine cooling system and cooling control method

Abstract

An engine cooling system and a cooling control method are used to meet the refrigeration requirements of an engine under different loads. The engine cooling system comprises a heat exchange module, a water pump, a cooling tank, a thermostat, a bypass pipeline module, a control valve module and a controller. The water inlet of the heat exchange module is connected with the water outlet of the cooling tank through the water pump, and the water outlet of the heat exchange module is connected with the water inlet of the cooling tank through the thermostat. The first end of the bypass pipeline module is connected with the water outlet of the cooling tank through the control valve module and the water pump, and the second end of the bypass pipeline module is connected with the water inlet of the water tank through the thermostat. The controller is connected with 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.

Description

TECHNICAL FIELD

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

[0002] During the running of the automobile, the temperature of the engine is too low or too high, which will affect the performance of the automobile, therefore, during the running, the engine of the automobile needs to be heated or cooled.

[0003] The cooling of the engine in the automobile is mainly through the configuration of multiple coolers in parallel to perform refrigeration operation on the water tank of the engine, the multiple coolers and the water tank form a circulating loop, and the engine is cooled and radiated by the circulating coolant of the engine. But the refrigeration capacity of the above-mentioned cooler is fixed, which can meet the refrigeration demand of the engine under full load, but the heat generated by the engine under different loads is different, therefore, the existing engine refrigeration method cannot meet the refrigeration demand of the engine under different loads. SUMMARY

[0004] The present application provides an engine cooling system and a cooling control method, which can meet the refrigeration demand of the engine under different loads.

[0005] In a first aspect, the present application provides an engine cooling system, which can be connected with the engine and cool and radiate the engine through the circulation of the cooling system. The engine cooling system comprises a heat exchange module, a water pump, a cooling tank, a thermostat, a bypass pipeline module, a control valve module and a controller.

[0006] The water inlet of the heat exchange module is connected with the water outlet of the cooling tank through the water pump, and the water outlet of the heat exchange module is connected with the water inlet of the cooling tank through the thermostat; the first end of the bypass pipeline module is connected with the water outlet of the cooling tank through the control valve module and the water pump, and the second end of the bypass pipeline module is connected with the water inlet of the water tank through the thermostat; the controller is connected with the control valve module, and is used for 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 water outlet of the water tank.

[0007] With the above design, the heat exchange module can be an integrated heat dissipation device for the engine, providing heat exchange and cooling. Currently, the heat exchange module's operation can meet the cooling requirements under high engine load conditions. However, when the engine is under low or medium load, the heat generated decreases, leading to a drop in coolant temperature after heat exchange. As the coolant circulates in the engine cooling system, the temperature of the coolant at both the engine and the coolant outlet of the coolant tank gradually decreases, potentially affecting normal engine operation. At this point, the controller can open the control valve module connected in series with the bypass pipeline module. In this situation, some coolant bypasses the heat exchange device and flows directly back to the coolant tank through the bypass pipeline module, reducing the amount of heat exchanged by the heat exchange module and preventing excessively low engine temperatures, thus meeting the engine's cooling requirements under different loads.

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

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

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

[0011] In one possible design, the engine cooling system further includes a temperature detector for detecting the temperature at the outlet of the coolant tank and outputting the detected temperature to the controller.

[0012] In one possible implementation, the controller is specifically used to: adjust 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 cooling tank outlet and the temperature change rate of the cooling tank outlet.

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

[0014] Secondly, embodiments of this application provide a cooling control method, which can be applied to the engine refrigeration system provided in the first aspect of this application and any possible design therein, and is executed by a controller in the engine refrigeration system. The cooling control method includes the following steps:

[0015] The system detects the temperature at the outlet of the cooling tank; based on the temperature at the outlet of the cooling tank, it controls the opening and closing of the control valve module and adjusts the opening degree of the control valve module.

[0016] In one possible design, controlling the opening and closing of the control valve module based on the outlet temperature of the cooling tank, and adjusting the opening degree of the control valve module, includes:

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

[0018] In one possible design, adjusting the opening and closing of the control valve module based on the temperature of the cooling tank outlet and the rate of temperature change at the cooling tank outlet, and adjusting the opening degree of the control valve module, includes:

[0019] When the temperature at the cooling tank outlet is detected to be lower than a first temperature and the temperature change rate at the cooling tank outlet is lower than a set value, the control valve module is controlled to open and be fully open. When the temperature at the cooling tank outlet is detected to be higher than a second temperature or the temperature change rate at the cooling tank outlet is lower than the set value, the control valve module is controlled to close. When the temperature at the cooling tank outlet is detected to be higher than the first temperature and lower than the second temperature, if the temperature change rate at the cooling tank outlet is lower than the set value, the control valve module is controlled to open, and the opening degree of the control valve module is adjusted according to a pre-stored correspondence table between the set opening degree and the cooling tank outlet temperature and temperature change rate.

[0020] Furthermore, the technical effects of the second aspect and any of its possible designs can be found in the technical effects of different designs in the first aspect of the embodiments of this application, and will not be repeated here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of an engine cooling system provided in this application embodiment. Figure 1 ;

[0023] Figure 2 A schematic diagram of an engine cooling system provided in this application embodiment. Figure 2 ;

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

[0025] Figure 4 A schematic diagram of an engine cooling system provided in this application embodiment. Figure 3 ;

[0026] Figure 5 A schematic diagram of an engine cooling system provided in this application embodiment. Figure 4 ;

[0027] Figure 6 A schematic diagram of an engine cooling system provided in this application embodiment. Figure 5 ;

[0028] Figure 7 This is a schematic flowchart of a cooling control method provided in an embodiment of this application. Detailed Implementation

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

[0030] The terminology used in the implementation section of this application is only for explaining specific embodiments of this application and is not intended to limit this application. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0031] The following explanations of some terms used in the embodiments of this application are provided to facilitate understanding by those skilled in the art.

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

[0033] (2) In the embodiments of this application, “multiple” refers to two or more, and other quantifiers are similar.

[0034] (3) In the embodiments of this application, "connection" can be understood as electrical connection. The electrical connection between two electrical components can be a direct or indirect connection between the two electrical components. For example, A and B can be connected directly, or A and B can be indirectly connected through one or more other electrical components, such as A and B being connected. Alternatively, A can be directly connected to C, C can be directly connected to B, and A and B can be connected through C.

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

[0036] The engine cooling system provided in this application embodiment is applied to engines with different operating states. These engines can be located in different devices; for example, if the engine is located in a car, it can output mechanical energy to move the car. When the car is moving or stationary, and at different speeds, the engine's output power varies, resulting in different amounts of heat generated during engine operation. If a cooling device with a constant cooling effect is used, it cannot meet the engine's cooling requirements under different loads.

[0037] To address the aforementioned problems, this application provides an engine cooling system and a cooling control method that can adjust the cooling capacity to meet the engine's cooling needs under different loads. To facilitate understanding of the claimed solution, an example of an engine connected to an engine cooling device and used in a vehicle will be provided.

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

[0039] The heat exchange module's inlet is connected to the cooling tank's outlet via a water pump, and the heat exchange module's outlet is connected to the cooling tank's inlet via a thermostat. The first end of the bypass pipeline module is connected to the cooling tank's outlet via a control valve module and a water pump, and the second end of the bypass pipeline module is connected to the water tank's inlet via a 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 tank's outlet.

[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 connected to the engine, the engine cooling system can have more... Figure 1 More components are shown. Among them, Figure 1 The various components shown can 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 practical applications, water pumps can be selected from commonly used components in the industry that can provide power, for example, see [link to relevant documentation]. Figure 2 The diagram shows the structure of an engine cooling system when the water pump is a centrifugal pump. The water pump provides power to the coolant in the cooling tank, allowing the coolant to circulate in the heat exchange module and bypass piping module, thereby cooling the engine.

[0042] See Figure 3 As shown, the heat exchange module can include multiple industry-standard water-cooled heat exchangers. These heat exchangers can be integrated cooling devices within the engine, such as an exhaust gas recirculation (EGR) cooler, an oil cooler, and the engine block. Alternatively, other water-cooled heat exchangers can be used. These multiple heat exchangers are connected in parallel, and each heat exchanger is connected to the outlet of the cooling tank via a water pump. The water pump provides power, causing the coolant in the cooling tank to circulate within the heat exchange module, thereby cooling the engine.

[0043] In practical applications, the aforementioned heat exchange device can have a first flow channel and a second flow channel that are isolated from each other and capable of heat exchange. The first interface of the first flow channel can serve as a coolant inlet connected to a water pump, and the second interface of the second flow channel can serve as a coolant outlet connected to a thermostat. The second flow channel can also connect to the engine's cooling pipes. When the engine cooling system is running, the coolant flowing from the cooling box exchanges heat with the second flow channel as it passes through the first flow channel, thereby reducing the temperature of the heat exchange medium in the second flow channel and achieving the effect of lowering the engine temperature.

[0044] See also Figure 3As shown, since the cooling capacity of the heat exchanger is fixed when the coolant in the heat exchange module is constant, when the engine load changes, the cooling capacity of the heat exchanger in the heat exchange module cannot meet the cooling demand of the engine after the load change. In order to meet the cooling demand of the engine and ensure its normal operation, the engine cooling system provided in this application embodiment is also equipped with a bypass pipeline module. This bypass pipeline module is connected in series with the control valve module and then in parallel with the heat exchange module. When the engine is under low load, the controller can control the control valve module connected in series with the bypass pipeline module to open, and the coolant tank and the bypass pipeline module are connected to form a circulation loop. Coolant flows through the bypass pipeline module, so the coolant flow rate through the heat exchange module is reduced, thereby reducing the cooling effect and preventing the engine from running at low temperatures. In addition, the controller can also adjust the coolant flow rate through the heat exchanger in the bypass pipeline module and the heat exchange module by adjusting the opening of the control valve module, thereby meeting the cooling demand of the engine under different loads.

[0045] Based on the above description, the engine cooling system mainly adjusts the flow rate of coolant through the bypass piping module according to different engine load conditions to meet the cooling requirements of the engine under different loads. The process of adjusting the coolant flow rate through the bypass piping module is explained below, taking into account the structure of the bypass piping module and the control valve module.

[0046] In one possible implementation, the bypass piping module includes a first bypass piping, and the control valve module includes a first control valve. A first end of the first bypass piping is connected to the outlet of the cooling tank via the first control valve and a water pump, and a second end of the first bypass piping is connected to the inlet of the cooling tank via a thermostat. The first control valve can be an industry-standard device for regulating the flow rate of the coolant in the piping; for example, see [reference needed]. Figure 4 and Figure 5 The diagram shown is a structural schematic of the engine cooling system when the first control valve is a throttle valve and an electrically controlled gate valve with adjustable opening.

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

[0048] It should be noted that the second control valve can be either a commonly used device in the industry that regulates the flow of coolant in the pipeline, or a commonly used device that only has on / off functionality. See [link / reference] Figure 6The diagram shows the structure of an engine cooling system when the second control valve uses an industry-standard device with both opening and closing mechanisms. In this case, the controller can adjust the opening degree of the control valve module by controlling the number of second control valves that are open. For example, when the bypass pipeline module includes two second bypass pipelines and the control valve module includes two second control valves, if one second control valve is opened and the other is closed, the opening degree of the control valve module is 50%. Of course, the bypass pipeline module can also include other numbers of second bypass pipelines. The specific number of second bypass pipelines can be configured according to the engine's application scenario and cooling requirements, and this application does not impose specific limitations on this.

[0049] The following example uses engine load conditions including high load, low load, and medium load, combined with... Figures 4 to 6 The structure of the engine cooling system shown is illustrated, and the process of adjusting the cooling capacity of the engine cooling system is explained in detail.

[0050] In some implementations, the cooling capacity of the engine cooling system can be determined to meet the current load requirements of the engine by detecting the temperature of the coolant outlet. For example, when the control valve module connected in series with the bypass pipeline module is closed, if the engine is under low load, the temperature of the heat exchange medium that exchanges heat with the coolant in the heat exchange module will be low. Therefore, the temperature of the coolant outlet will gradually decrease. Thus, when the coolant outlet temperature T is less than a first temperature T, it can be determined that the engine is under low load. In this case, the control valve module connected in series with the bypass pipeline can be opened to reduce the flow rate of coolant in the heat exchange module and reduce the cooling capacity. When the control valve module connected in series with the bypass pipeline is in the open state, if the engine changes 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 higher. Therefore, the temperature of the coolant outlet will gradually rise. So when the coolant outlet temperature T is greater than the second temperature T2, it can be determined that the engine is in a high load state. Then the control valve module connected in series with the bypass pipeline can be closed to increase the flow rate of coolant in the heat exchange module, thereby improving the cooling effect.

[0051] In practical applications, the opening and closing of the control valve module connected in series with the bypass pipeline is determined by only detecting the temperature of the coolant outlet. Although the cooling adjustment of the engine cooling system takes a certain amount of time, it cannot be adapted to some situations with high cooling requirements. Based on this, the engine cooling system provided in this application embodiment can also use the temperature change rate of the coolant outlet to control the state of the control valve module connected in series with the bypass pipeline.

[0052] When the engine is under low load, its output power is low, and correspondingly, it generates less heat. If the control valve module connected in series with the bypass pipeline module is closed, and all the coolant flows through the heat exchange module to cool the engine, the coolant temperature will decrease after heat exchange, but the decrease will be small. This results in a lower coolant temperature output after passing through the cooling box, increasing the engine's cooling capacity. This may cause the engine temperature to deviate from its normal operating temperature range, affecting the engine's normal operation. Therefore, the engine load can be determined based on the cooling box outlet temperature and the outlet temperature change rate ΔT.

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

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

[0055] 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°C, 40°C], the first temperature T1 can be set to 22°C. Of course, it can also be set to other values, which are not specifically limited here. The temperature change rate ΔT can be calculated by the temperature of the water tank outlet within a preset time period. For example, if the start time of the preset time period is t1 and the end time of the preset time period is t2, and 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 ΔT = (Tt1 - Tt2) / (t1 - t2).

[0056] Detecting the coolant outlet temperature can be used to determine whether the current cooling capacity meets the engine's cooling requirements. Detecting the temperature change rate ΔT at the coolant outlet can determine the temperature trend. For example, if the current coolant outlet temperature is 30°C, it cannot meet the engine's cooling needs when it is below 20°C. If the detected temperature change rate ΔT is a decrease of 1°C per minute, then after 10 minutes, the engine cooling system's cooling effect will not meet the engine's cooling requirements. Therefore, the temperature change rate ΔT at the coolant outlet can be used to predict the engine cooling system's cooling capacity. The set value can be adjusted according to the engine's application scenario and cooling requirements; this application does not impose further limitations.

[0057] In practical applications, when the engine is detected to be under low load, the controller can open the control valve module connected in series with the bypass pipeline module and keep the control valve module connected to the bypass pipeline module fully open. At this time, part of the coolant flowing into the cooling box exchanges heat with the engine through the heat exchange module, and part of the coolant returns directly to the cooling box through the bypass pipeline module. Since the flow rate of coolant exchanging heat with the engine in the heat exchange module is reduced, the cooling effect of the heat exchange module on the engine is weakened. The temperature of the cooling box outlet and the engine temperature will gradually increase, avoiding the engine temperature from being too low and ensuring the normal operation of the engine, thereby meeting the cooling needs when the engine is under low load.

[0058] When the engine is under high load, its output power is high, resulting in a significant amount of heat generation. Normally, the cooling capacity of the heat exchanger in the heat exchange module alone is sufficient to meet the cooling requirements under high load. However, if the control valve module connected in series with the bypass piping module opens, the water tank temperature will rise rapidly or increase quickly in a short period. Therefore, the engine load can be determined based on the water tank outlet temperature and the rate of temperature change at the outlet, ΔT.

[0059] Specifically, when the detected coolant outlet temperature T is greater than the second temperature T2, it can be determined that the engine is under high load. Even if the current coolant outlet temperature is still lower than the second temperature T2, since the coolant circulation in the engine cooling system takes time, if the detected rate of temperature change ΔT at the coolant outlet is greater than a set value, it indicates that the coolant outlet temperature is rising rapidly, which also confirms that the engine is under high load. The second temperature T2 can be set according to the engine's normal operating temperature range. For example, if the engine's normal operating temperature range is [20°C, 40°C], the second temperature T2 can be set to 38°C. Of course, it can also be set to other values; this application does not impose specific limitations on this.

[0060] In practical applications, when the engine is detected to be under high load, the controller can close the control valve connected in series with the bypass pipeline module. At this time, all the coolant flows to the heat exchange module to exchange heat with the engine. As the flow rate of coolant exchanging heat with the engine in the heat exchange module increases, the cooling effect of the heat exchange module on the engine is enhanced. The temperature of the coolant outlet and the engine temperature will gradually decrease, avoiding excessive engine temperature and ensuring normal engine operation, thereby meeting the cooling requirements of the engine under high load.

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

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

[0063] In practical applications, when the engine is detected to be under medium load, the controller can open the control valve connected in series with the bypass pipeline module. Based on a pre-stored table showing the correspondence between the set opening degree and the coolant outlet temperature and temperature change rate, the controller adjusts the opening degree of the control valve module to adjust the coolant flow rate in the heat exchange module and the bypass pipeline module. This adjusts the heat exchange capacity of the heat exchange module, preventing the engine temperature from becoming too high and ensuring the normal operation of the engine, thus meeting the cooling requirements of the engine under medium load.

[0064] It should be noted that the correspondence between the opening degree and the coolant outlet temperature and temperature change rate can be set based on the current coolant outlet temperature T and temperature change rate ΔT. For example, if the current coolant outlet temperature T is 32°C and the temperature change rate ΔT decreases by 1°C every 10 minutes, the corresponding opening degree can be set to 50°C. If the coolant outlet temperature T is 35°C and the temperature change rate ΔT decreases by 3°C every 10 minutes, the corresponding opening degree can be set to 90°C. The specific values ​​can be configured based on the engine's cooling requirements and the operator's experience, which will not be discussed further in this application.

[0065] In practical applications, if the control valve module is Figure 6 As shown in the structure, the controller can adjust the opening degree of the control valve module by controlling the number of openings of multiple second control valves in the control valve module. For example, if the control valve module has 10 second control valves, when it is necessary to adjust the opening degree of the control valve module to 90 degrees, it can control 9 of the 10 second control valves to open and the remaining second control valve to close, thereby achieving the effect of adjusting the opening degree of the control valve module.

[0066] It should be noted that the above is an example of an engine cooling system. In actual applications, the heat exchange devices and pumps provided in this application embodiment can also be other devices with the above functions, which will not be described in detail here.

[0067] Based on the above description, this application also 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 [link to relevant documentation]. Figure 7 As shown, the specific steps include:

[0068] Step S701: Detect the temperature at the outlet of the cooling tank.

[0069] Step S702: Based on the outlet temperature of the cooling tank, control the opening and closing of the control valve module, and adjust the opening degree of the control valve module.

[0070] In one possible implementation, the opening and closing of the control valve module, and the adjustment of the opening degree of the control valve module, are controlled based on the outlet temperature of the cooling tank, including:

[0071] Based on the temperature at the cooling tank outlet and the rate of temperature change at the cooling tank outlet, adjust the opening and closing of the control valve module, as well as the opening degree of the control valve module.

[0072] In one possible implementation, the opening and closing of the control valve module, as well as the adjustment of the opening degree of the control valve module, are based on the temperature at the cooling tank outlet and the rate of temperature change at the cooling tank outlet, including:

[0073] When the temperature at the cooling tank outlet is detected to be lower than the first temperature and the temperature change rate at the cooling tank outlet is lower than the set value, the control valve module is opened and fully open. When the temperature at the cooling tank outlet is detected to be higher than the second temperature or the temperature change rate at the cooling tank outlet is lower than the set value, the control valve module is closed. When the temperature at the cooling tank outlet is detected to be higher than the first temperature and lower than the second temperature, if the temperature change rate at the cooling tank outlet is lower than the set value, the control valve module is opened, and the opening degree of the control valve module is adjusted according to the pre-stored correspondence table between the set opening degree and the cooling tank outlet temperature and temperature change rate.

[0074] It should be noted that the process of adjusting the cooling capacity by utilizing the temperature at the outlet of the cooling tank and the rate of temperature change at the outlet of the cooling tank can be found in the aforementioned relevant description, and will not be repeated here.

[0075] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0076] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0077] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0078] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0079] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. An engine cooling system, characterized in that, include: Heat exchange modules, water pumps, cooling tanks, thermostats, bypass piping modules, control valve modules, and controllers; The inlet of the heat exchange module is connected to the outlet of the cooling tank via the water pump, and the outlet of the heat exchange module is connected to the inlet of the cooling tank via the thermostat. The first end of the bypass pipeline module is connected to the outlet of the cooling tank through the control valve module and the water pump, and the second end of the bypass pipeline module is connected to the inlet of the cooling 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 cooling tank outlet. The controller is specifically used to: adjust 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 cooling tank outlet and the temperature change rate of the cooling tank outlet; The controller is specifically used for: When the temperature at the outlet of the cooling tank is detected to be lower than the first temperature and the rate of temperature change at the outlet of the cooling tank is lower than the set value, the control valve module is controlled to open and be fully open. When the temperature at the outlet of the cooling tank is detected to be greater than the second temperature or the rate of temperature change at the outlet of the cooling tank is less than the set value, the control valve module is controlled to close. When the temperature at the outlet of the cooling tank is detected to be greater than the first temperature and less than the second temperature, if the temperature change rate at the outlet of the cooling tank is less than the set value, the control valve module is controlled to open, and the opening degree of the control valve module is adjusted according to the pre-stored correspondence table between the set opening degree and the outlet temperature and temperature change rate of the cooling 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 outlet of the cooling tank through the first control valve and the water pump, and the second end of the first bypass pipeline is connected to the inlet of the cooling tank through the thermostat.

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

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

5. The system according to any one of claims 2 to 4, characterized in that, The engine cooling system also includes a temperature detector, which is used to detect the temperature of the coolant outlet and output the detected temperature to the controller.

6. A cooling control method, characterized in that, Applied to the engine cooling system as described in any one of claims 1 to 5, the method comprises: Detect the temperature at the outlet of the cooling tank; The opening and closing of the control valve module are controlled according to the temperature of the cooling tank outlet, and the opening degree of the control valve module is adjusted.

7. The method according to claim 6, characterized in that, The step of controlling the opening and closing of the control valve module and adjusting the opening degree of the control valve module according to the outlet temperature of the cooling tank includes: Based on the temperature at the outlet of the cooling tank and the rate of temperature change at the outlet of the cooling tank, the opening and closing of the control valve module and the opening degree of the control valve module are adjusted.

8. The method according to claim 7, characterized in that, The step of adjusting the opening and closing of the control valve module and adjusting the opening degree of the control valve module based on the temperature of the cooling tank outlet and the rate of temperature change of the cooling tank outlet includes: When the temperature at the outlet of the cooling tank is detected to be lower than the first temperature and the rate of temperature change at the outlet of the cooling tank is lower than the set value, the control valve module is controlled to open and be fully open. When the temperature at the outlet of the cooling tank is detected to be greater than the second temperature or the rate of temperature change at the outlet of the cooling tank is less than the set value, the control valve module is controlled to close. When the temperature at the outlet of the cooling tank is detected to be greater than the first temperature and less than the second temperature, if the temperature change rate at the outlet of the cooling tank is less than the set value, the control valve module is controlled to open, and the opening degree of the control valve module is adjusted according to the pre-stored correspondence table between the set opening degree and the outlet temperature and temperature change rate of the cooling tank.

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