A method of thermal management and vehicle

Abstract

The application provides a heat management method and a vehicle, which are applied to a vehicle heat management system and include the following steps: obtaining an engine water temperature, an engine speed, a vehicle speed, an ambient temperature, an engine load and a target water temperature; if the vehicle speed meets a first preset vehicle speed condition, the engine water temperature meets a first preset temperature range condition, and the speed of an electronic water pump meets a first preset speed condition, determining a first thermostat duty ratio, a first water pump duty ratio and a first fan duty ratio based on the parameters; if the vehicle speed meets a second preset vehicle speed condition, the engine water temperature meets a second preset temperature range condition, and the speed of the electronic water pump meets a second preset speed condition, determining a second thermostat duty ratio, a second water pump duty ratio and a second fan duty ratio based on the parameters; and based on the duty ratios, cooperatively controlling the operation of the electronic water pump, the electronic thermostat and the electronic fan to perform the heat management of the vehicle, thereby improving the heat management efficiency of the vehicle.

Description

Technical Field

[0001] This application belongs to the field of vehicle technology, and in particular relates to a thermal management method and a vehicle. Background Technology

[0002] With the development of vehicle technology, the number of vehicles is increasing, leading to a rise in carbon emissions. Vehicle energy consumption is directly proportional to carbon emissions; therefore, reducing vehicle energy consumption can effectively reduce carbon emissions.

[0003] Existing technologies for electronic water pumps, electronic thermostats, and electronic fans all employ separate thermal management methods for each heat dissipation module. These methods independently control the operation of each heat dissipation module based on relevant vehicle parameters, increasing vehicle energy consumption and reducing thermal management efficiency.

[0004] Existing technologies suffer from the problem that independent operation of each heat dissipation module increases energy consumption and reduces the vehicle's thermal management efficiency. Summary of the Invention

[0005] This application provides a thermal management method and vehicle that can solve the problem that independent operation of each heat dissipation module increases energy consumption and reduces the thermal management efficiency of the vehicle.

[0006] In a first aspect, embodiments of this application provide a thermal management method applied to a vehicle thermal management system, the vehicle thermal management system including an electronic thermostat, an electronic water pump, and an electronic fan, comprising:

[0007] Acquire engine coolant temperature, engine speed, vehicle speed, ambient temperature, engine load, and target coolant temperature;

[0008] If the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the speed of the electronic water pump meets the first preset speed condition, based on the engine coolant temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target coolant temperature, the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electronic fan are determined.

[0009] If the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the speed of the electronic water pump meets the second preset speed condition, based on the engine coolant temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target coolant temperature, the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electronic fan are determined.

[0010] Based on the duty cycle of the first thermostat, the duty cycle of the second thermostat, the duty cycle of the first water pump, the duty cycle of the second water pump, the duty cycle of the first fan, and the duty cycle of the second fan, the operation of the electronic water pump, the electronic thermostat, and the electronic fan are coordinated to perform vehicle thermal management.

[0011] Secondly, embodiments of this application provide a thermal management device applied to a vehicle thermal management system, the device comprising:

[0012] The acquisition module is used to acquire engine coolant temperature, engine speed, vehicle speed, ambient temperature, engine load, and target coolant temperature.

[0013] The first determining module is used to determine the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electronic fan based on the engine water temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target water temperature, if the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the rotation speed of the electronic water pump meets the first preset rotation speed condition.

[0014] The second determining module is used to determine the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electronic fan based on the engine water temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target water temperature, if the vehicle speed meets the second preset vehicle speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the rotation speed of the electronic water pump meets the second preset rotation speed condition.

[0015] The control module is used to control the operation of the electronic water pump, the electronic thermostat, and the electronic fan based on the duty cycle of the first thermostat, the duty cycle of the second thermostat, the duty cycle of the first water pump, the duty cycle of the second water pump, the duty cycle of the first fan, and the duty cycle of the second fan, respectively, so as to perform vehicle thermal management.

[0016] Thirdly, embodiments of this application provide an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method as described in any one of the first aspects.

[0017] Fourthly, embodiments of this application provide a vehicle including an engine and a vehicle thermal management system, the vehicle thermal management system performing the method as described in any one of the first aspects.

[0018] It is understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant descriptions in the first aspect above, and will not be repeated here.

[0019] The beneficial effects of the embodiments in this application compared with the prior art are:

[0020] This application applies to a vehicle thermal management system, which includes an electronic thermostat, an electronic water pump, and an electronic fan. It acquires engine coolant temperature, engine speed, vehicle speed, ambient temperature, engine load, and a target coolant temperature. If the vehicle speed meets a first preset speed condition, the engine coolant temperature meets a first preset temperature range condition, and the electronic water pump speed meets a first preset speed condition, the system determines a first thermostat duty cycle, a first water pump duty cycle, and a first fan duty cycle based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature. If the vehicle speed meets a second preset speed condition, the engine coolant temperature meets a second preset temperature range condition, and the electronic water pump speed meets a second preset speed condition, the system determines a first thermostat duty cycle, a first water pump duty cycle, and a first fan duty cycle based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature. The system sets the water temperature and determines the duty cycles of the second thermostat, the second water pump, and the second fan. Based on these duty cycles, the operation of the electronic water pump, electronic thermostat, and electronic fan is coordinated to manage the vehicle's thermal performance. Compared to existing thermal management methods where each cooling module operates independently, this approach, based on driving scenario constraints and determining the duty cycles of the electronic fan, electronic water pump, and electronic thermostat separately for each parameter, and then controlling the electronic water pump, electronic thermostat, or electronic fan according to each duty cycle for coordinated vehicle thermal management, avoids overlapping energy consumption of some cooling modules in the thermal management system, reduces vehicle energy consumption, and improves vehicle thermal management efficiency. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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 This is a schematic diagram of the structure of a vehicle thermal management system provided in an embodiment of this application;

[0023] Figure 2 This is a schematic flowchart of a thermal management method provided in an embodiment of this application;

[0024] Figure 3 This is a schematic diagram of the process for obtaining the target water temperature according to an embodiment of this application;

[0025] Figure 4 This is a flowchart illustrating how, in one embodiment of this application, if the vehicle speed meets a first preset vehicle speed condition, the engine coolant temperature meets a first preset temperature zone condition, and the electronic water pump speed meets a first preset speed condition, the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electronic fan are determined based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature.

[0026] Figure 5 This is a flowchart illustrating the process of determining the first fan duty cycle of an electronic fan based on engine water temperature, vehicle speed, and ambient temperature, provided in an embodiment of this application, if the vehicle speed meets the first preset vehicle speed condition, the engine water temperature meets the first preset temperature zone condition, and the rotation speed of the electronic water pump meets the first preset rotation speed condition.

[0027] Figure 6 This is a flowchart illustrating the process of determining the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electronic fan based on engine water temperature, vehicle speed, engine load, engine speed, ambient temperature, and target water temperature, provided in one embodiment of this application.

[0028] Figure 7 This is a flowchart illustrating the process of determining the second fan duty cycle of an electronic fan based on engine water temperature, vehicle speed, and ambient temperature, provided in an embodiment of this application, if the vehicle speed meets the second preset vehicle speed condition, the engine water temperature meets the second preset temperature zone condition, and the rotation speed of the electronic water pump meets the second preset rotation speed condition.

[0029] Figure 8 This is a schematic diagram of the structure of a thermal management device provided in an embodiment of this application. Detailed Implementation

[0030] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0031] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0032] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] With the development of vehicle technology, the number of vehicles is increasing, leading to a rise in carbon emissions. Vehicle energy consumption is directly proportional to carbon emissions; therefore, reducing vehicle energy consumption can effectively reduce carbon emissions.

[0034] In the embodiments of this application, such as Figure 1 As shown, vehicle thermal management includes engine cooling. The vehicle comprises an engine and a vehicle thermal management system. The vehicle thermal management system includes an electronic water pump, an electronic thermostat, an electronic fan, a radiator, a main coolant temperature module, and an engine control module. The main coolant temperature module is located on the engine block. The engine control module is connected to both the main coolant temperature module and the radiator to receive temperature regulation requests from both. The engine control module is also connected to the electronic fan, electronic thermostat, and electronic water pump to control their operation according to temperature regulation requirements, thus managing the vehicle's thermal system. The engine and vehicle thermal management system can form a small-loop and a large-loop thermal management system. The small-loop system involves the electronic thermostat valve being closed, with coolant circulating between the engine and the electronic water pump. The large-loop system involves the electronic thermostat valve being partially or fully open, with coolant circulating between the engine, electronic thermostat, radiator, and electronic water pump. Among them, the power range of electronic thermostats is 30W to 60W, the power range of electronic water pumps is 100W to 400W, and the power range of electronic fans is 600W to 850W.

[0035] It should be noted that the electronic water pump in this embodiment is an electronic water pump connected to the engine control module, mainly used for cooling the engine based on the control commands of the engine control module; the electronic fan in this embodiment is an electronic fan connected to the engine control module, mainly used for cooling the engine based on the control commands of the engine control module; and in this embodiment, the electronic thermostat is an electronic thermostat with electric heating function.

[0036] In existing technologies, each cooling module of the electronic water pump, electronic thermostat, and electronic fan is equipped with a separate thermal management method. The operation of each cooling module is independently controlled according to relevant vehicle parameters. For example, the electronic water pump, electronic thermostat, and electronic fan are controlled independently based on the engine coolant temperature. That is, based on the same engine coolant temperature, the three cooling modules operate independently according to their respective control strategies, and there is no linkage between their operation control. For another example, since the power of the electronic water pump is less than that of the electronic fan, there are scenarios where the electronic fan runs at high speed or even full speed, while the electronic water pump does not run at full speed, resulting in energy waste, increased vehicle energy consumption, and reduced vehicle thermal management efficiency.

[0037] Existing technologies suffer from the problem that the independent operation of each heat dissipation module increases complexity and energy consumption, thereby reducing the vehicle's thermal management efficiency.

[0038] The thermal management method of this application embodiment is applied to a vehicle thermal management system. It acquires engine coolant temperature, engine speed, vehicle speed, ambient temperature, engine load, and target coolant temperature. If the vehicle speed meets a first preset speed condition, the engine coolant temperature meets a first preset temperature range condition, and the electric water pump speed meets a first preset speed condition, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, it determines the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electric fan. If the vehicle speed meets a second preset speed condition, the engine coolant temperature meets a second preset temperature range condition, and the electric water pump speed meets a second preset speed condition, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, it determines the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electric fan. The system employs a second thermostat duty cycle, a second water pump duty cycle, and a second fan duty cycle. Based on the first, second, first, second, and third water pump duty cycles, as well as the first and second fan duty cycles, the operation of the electronic water pump, electronic thermostat, and electronic fan is coordinated to manage the vehicle's thermal performance. Compared to existing thermal management methods where each heat dissipation module operates independently, this system, based on constraints from the driving scenario and by determining the duty cycles of the electronic fan, electronic water pump, and electronic thermostat separately based on various parameters, and then controlling the electronic water pump, electronic thermostat, or electronic fan according to each duty cycle for coordinated vehicle thermal management, avoids overlapping energy consumption of some heat dissipation modules in the thermal management system, reduces vehicle energy consumption, and improves vehicle thermal management efficiency.

[0039] The technical solution of this application will be described below through specific embodiments.

[0040] Firstly, such as Figure 2As shown, this embodiment provides a thermal management method applied to a vehicle thermal management system. The vehicle thermal management system includes an electronic thermostat, an electronic water pump, and an electronic fan, comprising:

[0041] S100 acquires engine coolant temperature, engine speed, vehicle speed, ambient temperature, engine load, and target coolant temperature.

[0042] In one embodiment, engine coolant temperature, engine speed, vehicle speed, ambient temperature, engine load, and target coolant temperature are obtained to facilitate the determination of the duty cycle of the electronic water pump, electronic fan, and electronic thermostat.

[0043] In one embodiment, the target water temperature includes a first target water temperature and a second target water temperature.

[0044] In one embodiment, such as Figure 3 As shown, obtaining the target water temperature includes:

[0045] S110, obtain engine speed and engine load.

[0046] S120 determines the first target water temperature based on engine speed and engine load.

[0047] In one embodiment, as shown in Table 1, a first target coolant temperature is determined based on engine speed and engine load. For example, when the engine speed increases from 650 rpm to 6000 rpm while the engine load remains constant, the first target coolant temperature decreases as the engine speed increases (except when the engine load is 0% or 15%). When the engine load increases from 0% to 180% while the engine speed remains constant, the first target coolant temperature decreases as the engine load increases. For another example, when the engine load is 45% and the engine speed is 1000 rpm, the corresponding first target coolant temperature is 95°C; when the engine speed is 5500 rpm, the corresponding first target coolant temperature is 85°C; when the engine speed is 3000 rpm and the engine load is 25%, the corresponding first target coolant temperature is 95°C; and when the engine load is 145%, the corresponding first target coolant temperature is 87°C.

[0048] Table 1 Engine Speed, Engine Load, and Corresponding First Target Water Temperature

[0049]

[0050] S130 determines the second target water temperature based on the ambient temperature and the first target water temperature.

[0051] In one embodiment, a second target water temperature is determined based on the ambient temperature and the first target water temperature. Since the target water temperature is corrected according to the ambient temperature, the control accuracy of the electronic thermostat is improved, and the mismatch between the target water temperature and the environment is avoided, thus reducing energy consumption.

[0052] In one embodiment, as shown in Table 2, the environmental correction factor for the target liquid medium is determined based on the ambient temperature, and the second target water temperature is determined based on the product of the environmental correction factor and the first target water temperature. For example, when the ambient temperature is -10°C, the corresponding environmental correction factor is 0.97. If the first target water temperature is 90°C, then the second target water temperature is 87.3°C.

[0053] Table 2 Ambient temperature and corresponding environmental correction factor

[0054]

[0055] S200: If the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the speed of the electronic water pump meets the first preset speed condition, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, determine the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electronic fan.

[0056] In one embodiment, if the vehicle speed meets a first preset speed condition, the engine coolant temperature meets a first preset temperature range condition, and the electric water pump speed meets a first preset speed condition, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electric fan are determined. After the valve of the electronic thermostat opens, a large circulation of engine coolant is formed, and the coolant flow rate of the electronic water pump is determined. The oncoming airflow brought by the vehicle speed is fully utilized to remove the heat generated by the engine. When the speed of the electronic water pump meets the first preset speed condition and the engine coolant temperature meets the first preset temperature range condition, the electric fan is triggered, which improves the cooling speed of the engine. At the same time, since the electronic thermostat with lower power is started first, then the electronic water pump is started, and then the electric fan is started based on the trigger condition, the electric water pump, electronic thermostat, or electric fan are controlled according to each duty cycle to perform thermal management of the whole vehicle in a coordinated manner. This avoids the situation where some energy consumption of the heat dissipation modules in the thermal management system overlaps, reduces the energy consumption of the vehicle, and improves the thermal management efficiency of the vehicle.

[0057] In one embodiment, the first preset vehicle speed condition is that the vehicle speed is greater than or equal to a preset vehicle speed threshold; the first preset temperature zone condition is that the engine coolant temperature is greater than or equal to a first preset temperature threshold, and the duration for which the engine coolant temperature is greater than or equal to the first preset temperature threshold is greater than or equal to a first preset duration threshold; the first preset rotational speed condition is that the rotational speed of the electric water pump is greater than or equal to a preset water pump rotational speed, and the duration for which the rotational speed of the electric water pump is greater than or equal to the preset water pump rotational speed is greater than or equal to a second preset duration threshold, wherein the preset vehicle speed threshold is 20 km / h, the first preset temperature threshold is 100℃, the preset water pump rotational speed ranges from 2000 rpm to 3000 rpm, the first preset duration threshold is greater than or equal to 2s, the second preset duration threshold is greater than or equal to 2s, the first preset duration threshold and the second preset duration threshold are the same, or the first preset duration threshold and the second preset duration threshold are different. It should be noted that in this embodiment, the specific values ​​of the preset vehicle speed threshold, preset water pump speed, first preset temperature threshold, first preset duration threshold, and second preset duration threshold are not limited. Their specific values ​​can be set according to the needs of the vehicle. For example, the preset vehicle speed threshold can also be 25km / h or 30km / h, the first preset temperature threshold can also be 103℃, the preset water pump speed can also be 2100rpm, 2200rpm, 2300rpm, 2400rpm, 2500rpm, 2600rpm, 2700rpm, 2800rpm, or 2900rpm, and the preset duration threshold can also be 1.5s or 2.5s.

[0058] In one embodiment, if the vehicle speed meets a first preset vehicle speed condition, the engine coolant temperature meets a first preset temperature range condition, and the electric water pump speed meets a first preset speed condition, before determining the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electric fan based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the process includes:

[0059] If the vehicle speed meets the first preset speed condition, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature and target coolant temperature, the first basic thermostat duty cycle of the electronic thermostat and the first basic water pump duty cycle of the electronic water pump are determined respectively.

[0060] In one embodiment, if the vehicle speed meets the first preset vehicle speed condition, but the engine coolant temperature does not meet the first preset temperature zone condition, and the speed of the electronic water pump does not meet the first preset speed condition, then the electronic fan has not yet intervened in thermal management and has not run to perform heat dissipation. Therefore, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the first basic thermostat duty cycle of the electronic thermostat and the first basic water pump duty cycle of the electronic water pump are determined respectively.

[0061] In one embodiment, if the vehicle speed meets a first preset speed condition, based on engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, a first basic thermostat duty cycle of the electronic thermostat is determined, including:

[0062] If the vehicle speed meets the first preset speed condition, the temperature difference between the engine coolant and the target coolant is determined based on the engine coolant temperature and the target coolant temperature; based on the engine coolant temperature and the temperature difference, the first temperature difference duty cycle of the electronic thermostat is determined, and the first temperature difference duty cycle represents the duty cycle corresponding to the engine coolant temperature and the temperature difference; based on the ambient temperature, vehicle speed, and the first temperature difference duty cycle, the first corrected duty cycle of the electronic thermostat is determined, and the first corrected duty cycle represents the corrected duty cycle of the first temperature difference duty cycle according to the ambient temperature and vehicle speed; based on the first temperature difference duty cycle and the first corrected duty cycle, the first basic thermostat duty cycle is determined.

[0063] In one embodiment, when the engine coolant temperature is greater than or equal to the thermal protection coolant temperature threshold, the duty cycle of the first basic thermostat is 100%.

[0064] In one embodiment, if the vehicle speed meets a first preset speed condition, based on engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the first basic water pump duty cycle of the electronic water pump is determined, including:

[0065] If the vehicle speed meets the first preset speed condition and the engine coolant temperature is in the third preset temperature zone, the first basic water pump duty cycle of the electronic water pump is determined based on the engine speed and engine load; or, if the vehicle speed meets the first preset speed condition and the engine coolant temperature is in the fourth preset temperature zone, the first basic water pump duty cycle of the electronic water pump is determined based on the engine speed and engine load. The value range of the third preset temperature zone is 85℃≤T<95℃, and the value range of the fourth preset temperature zone is T<88℃, where T is the engine coolant temperature.

[0066] In one embodiment, as shown in Table 3, the engine coolant temperature is 85℃≤T<95℃, where T is the engine coolant temperature. Based on the engine speed and engine load, the first basic water pump duty cycle of the electronic water pump is determined. For example, when the engine speed increases from 650 rpm to 6000 rpm while the engine load remains constant, the first basic water pump duty cycle of the electronic pump increases with the engine speed. When the engine load increases from 15% to 180% while the engine speed remains constant above 650 rpm, the first basic water pump duty cycle of the electronic pump increases with the engine load. A larger duty cycle indicates a larger flow rate of the electronic pump, which can accelerate the large circulation of the liquid medium and facilitate rapid heat dissipation of the engine. For example, when the engine load is 15% and the engine speed is 2500 rpm, the duty cycle of the first basic water pump corresponding to the electronic pump is 24%; when the engine speed is 4000 rpm, the duty cycle of the first basic water pump corresponding to the electronic pump is 36%; when the engine speed is 2500 rpm and the engine load is 15%, the duty cycle of the first basic water pump corresponding to the electronic pump is 24%; when the engine load is 120%, the duty cycle of the first basic water pump corresponding to the electronic pump is 33%.

[0067] Table 3 Engine Speed, Engine Load, and Corresponding First Basic Water Pump Duty Cycle of Electronic Pump (Table 3)

[0068]

[0069] In one embodiment, as shown in Table 4, when the engine coolant temperature is T < 88℃, where T is the engine coolant temperature, the first basic water pump duty cycle of the electronic water pump is determined based on the engine speed and engine load. For example, when the engine speed increases from 650 rpm to 6000 rpm while the engine load remains constant, the first basic water pump duty cycle of the electronic pump increases with the engine speed. When the engine load increases from 15% to 180% while the engine speed remains constant above 650 rpm, the first basic water pump duty cycle of the electronic pump increases with the engine load. A larger duty cycle indicates a larger flow rate of the electronic pump, facilitating rapid engine cooling. For example, when the engine load is 15% and the engine speed is 2500 rpm, the corresponding first basic water pump duty cycle of the electronic pump is 19%; when the engine speed is 4000 rpm, the corresponding first basic water pump duty cycle of the electronic pump is 35%. When the engine speed is 2500 rpm and the engine load is 15%, the duty cycle of the first basic water pump corresponding to the electronic pump is 19%. When the engine load is 120%, the duty cycle of the first basic water pump corresponding to the electronic pump is 23%.

[0070] Table 4 Engine Speed, Engine Load, and Corresponding First Basic Water Pump Duty Cycle of Electronic Pump (Table 4)

[0071]

[0072] In one embodiment, such as Figure 4 As shown, if the vehicle speed meets the first preset speed condition, the engine coolant temperature meets the first preset temperature range condition, and the electric water pump speed meets the first preset speed condition, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electric fan are determined, including:

[0073] S210, if the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the speed of the electronic water pump meets the first preset speed condition, the first thermostat duty cycle of the electronic thermostat is determined based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature.

[0074] In one embodiment, if the vehicle speed meets the first preset speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the speed of the electronic water pump meets the first preset speed condition, since the electronic fan has been triggered to run, the first thermostat duty cycle of the electronic thermostat is determined based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, and the electronic fan works in conjunction with the electronic fan to cool the engine, thereby avoiding energy waste and improving the vehicle's thermal management efficiency.

[0075] S220, if the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the speed of the electronic water pump meets the first preset speed condition, the first water pump duty cycle of the electronic water pump is determined based on the engine coolant temperature and the vehicle speed.

[0076] In one embodiment, as shown in Table 5, if the vehicle speed meets the first preset speed condition, the engine coolant temperature meets the first preset temperature range condition, and the electronic water pump speed meets the first preset speed condition (i.e., the vehicle speed is greater than or equal to 20 km / h, the engine coolant temperature is 100℃ < T, where T is the engine coolant temperature, and the electronic water pump speed is greater than or equal to 2500 rpm), the first water pump duty cycle of the electronic water pump is determined based on the engine coolant temperature and vehicle speed. For example, when the engine coolant temperature rises from 100℃ to 119℃ while the vehicle speed remains constant, the electronic water pump... The duty cycle of the first water pump in the electronic pump increases with the engine coolant temperature. When the vehicle speed increases from 0 to 240 km / h, and the engine coolant temperature remains constant except at 100℃ and 103℃, the duty cycle of the first water pump in the electronic pump maintains a constant high duty cycle as the vehicle speed increases. When the engine coolant temperature remains constant at 100℃ and 103℃, the duty cycle of the first water pump in the electronic pump increases with the vehicle speed. A higher duty cycle indicates a larger flow rate from the electronic pump, which accelerates the large-scale circulation of the liquid medium, facilitating rapid engine cooling. For example, at an engine coolant temperature of 100℃, the duty cycle of the first water pump at a vehicle speed of 30 km / h is 50%, and at a vehicle speed of 180 km / h, it is 80%. At a vehicle speed of 90 km / h, the duty cycle of the first water pump at an engine coolant temperature of 100℃ is 65%, and at an engine coolant temperature of 113℃, it is 100%.

[0077] Table 5 Engine coolant temperature, vehicle speed, and corresponding first water pump duty cycle of the electronic pump.

[0078]

[0079]

[0080] S230, if the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the speed of the electronic water pump meets the first preset speed condition, the first fan duty cycle of the electronic fan is determined based on the engine coolant temperature, vehicle speed, and ambient temperature.

[0081] In one embodiment, if the vehicle speed meets a first preset speed condition, the engine coolant temperature meets a first preset temperature range condition, and the electric water pump speed meets a first preset speed condition, the first fan duty cycle of the electric fan is determined based on the engine coolant temperature, vehicle speed, and ambient temperature. This indicates that the engine is overheating, and the electronic thermostat and electric water pump alone cannot adequately dissipate heat from the engine. To improve the engine's cooling efficiency, the electric fan is activated, and the oncoming natural wind brought by the vehicle speed enhances air convection and accelerates the cooling of the coolant, thus removing the engine's heat more quickly and maintaining the engine's normal operating temperature range. This ensures the normal operation of the engine. The electronic thermostat, electric water pump, and electric fan work together for thermal management, improving the vehicle's thermal management efficiency.

[0082] In one embodiment, such as Figure 5 As shown, if the vehicle speed meets the first preset speed condition, the engine coolant temperature meets the first preset temperature range condition, and the electric water pump speed meets the first preset speed condition, the first fan duty cycle of the electric fan is determined based on the engine coolant temperature, vehicle speed, and ambient temperature, including:

[0083] S231, if the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the speed of the electronic water pump meets the first preset speed condition, the first basic fan duty cycle of the electronic fan is determined based on the engine coolant temperature and the vehicle speed.

[0084] In one embodiment, as shown in Table 6, if the vehicle speed meets the first preset speed condition, the engine coolant temperature meets the first preset temperature range condition, and the electric water pump speed meets the first preset speed condition (i.e., the vehicle speed is greater than or equal to 20 km / h, the engine coolant temperature is in the first preset temperature range (100℃ < T), where T is the engine coolant temperature, and the electric water pump speed is greater than or equal to 2500 rpm), the first basic fan duty cycle of the electric fan is determined based on the engine coolant temperature and vehicle speed. For example, when the vehicle speed remains constant, as the engine coolant temperature rises from 103℃ to 120℃, the first basic fan duty cycle gradually increases. Except for 115℃, 117℃, 119℃, and 120℃, when the engine coolant temperature remains constant, as the vehicle speed rises from 20 km / h to 200 km / h, the first basic fan... The duty cycle gradually decreases. When the engine coolant temperature is 115℃, 117℃, 119℃, and 120℃, the duty cycle of the first base fan remains a constant high duty cycle as the vehicle speed increases. For example, when the vehicle speed is 20km / h, the duty cycle of the first base fan corresponding to an engine coolant temperature of 103℃ is 20%, and the duty cycle of the first base fan corresponding to an engine coolant temperature of 115℃ is 92%. Except for 115℃, 117℃, 119℃, and 120℃, when the engine coolant temperature is 105℃, the duty cycle of the first base fan corresponding to a vehicle speed of 20km / h is 30%, and the duty cycle of the first base fan corresponding to a vehicle speed of 180km / h is 10%. When the engine coolant temperature is 117℃, the duty cycle of the first base fan remains constant at 92% regardless of the vehicle speed.

[0085] Table 6 Engine coolant temperature, vehicle speed, and corresponding first basic fan duty cycle

[0086]

[0087] S232, determine the first correction factor based on the ambient temperature, the first correction factor characterizes the correction factor corresponding to the ambient temperature and vehicle speed.

[0088] In one embodiment, since the heat dissipation rate varies with different ambient temperatures, a first correction coefficient is determined based on the ambient temperature. The first correction coefficient represents the correction coefficient corresponding to the ambient temperature and vehicle speed, thereby improving the control accuracy of the electric fan. As the ambient temperature increases, the first correction coefficient gradually increases because the higher the ambient temperature, the lower the heat dissipation rate using natural wind. It is necessary to increase the duty cycle of the electric fan and increase the speed of the electric fan to quickly remove the heat from the engine, maintain the engine coolant temperature range for normal engine operation, and ensure the normal operation of the engine. The electronic thermostat, electronic water pump, and electric fan work together for thermal management, thereby improving the thermal management efficiency of the vehicle.

[0089] In one embodiment, as shown in Table 7, the first correction factor is 0.6 when the ambient temperature is -40°C and 1 when the ambient temperature is 20°C.

[0090] Table 7 Ambient Temperature and Corresponding First Correction Factor

[0091]

[0092] S233, determine the duty cycle of the first fan based on the duty cycle of the first base fan and the first correction coefficient.

[0093] In one embodiment, the duty cycle of the first fan is determined based on the product of the duty cycle of the first base fan and the first correction coefficient, thereby improving the control accuracy of the electronic fan.

[0094] S300: If the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the electric water pump speed meets the second preset speed condition, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, determine the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electric fan.

[0095] In one embodiment, if the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature range condition, and the electric water pump speed meets the second preset speed condition, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electric fan are determined. Since the vehicle speed under the second preset speed condition is less than the vehicle speed under the first preset speed condition, a large circulation of engine coolant is formed after the electronic thermostat valve opens. Therefore, the duty cycle of the electric water pump needs to be re-determined to increase the coolant flow rate and fully utilize the... By utilizing the oncoming wind generated by the vehicle's speed, the heat generated by the engine is carried away. When the electric water pump's speed meets the second preset speed condition and the engine coolant temperature meets the second preset temperature zone condition, the operating speed of the electric fan is increased, thereby improving the engine's heat dissipation speed. At the same time, since the electronic thermostat with relatively low power has already been activated, the duty cycle of the electric water pump is increased, and the speed of the electric fan is increased based on the trigger condition. By controlling the electric water pump, electronic thermostat, or electric fan according to each duty cycle, the entire vehicle's thermal management is coordinated. This avoids the overlapping operation of some energy consumption of the heat dissipation modules in the thermal management system, reduces the vehicle's energy consumption, and improves the vehicle's thermal management efficiency.

[0096] In one embodiment, the second preset vehicle speed condition is that the vehicle speed is less than a preset vehicle speed threshold; the second preset temperature zone condition is that the engine coolant temperature is greater than or equal to a second preset temperature threshold, and the duration for which the engine coolant temperature is greater than or equal to the second preset temperature threshold is greater than or equal to a first preset duration threshold; the second preset speed condition is that the speed of the electric water pump is greater than or equal to a preset water pump speed, and the duration for which the electric water pump speed is greater than or equal to the preset water pump speed is greater than or equal to the second preset duration threshold. The preset vehicle speed threshold is 20 km / h, the second preset temperature threshold is 95°C, and the preset water pump speed ranges from 2000 rpm to 3000 rpm. It should be noted that in this embodiment, the specific values ​​of the preset vehicle speed threshold, preset water pump speed, and first preset temperature threshold are not limited; their specific values ​​are set according to the vehicle's requirements.

[0097] In one embodiment, if the vehicle speed meets a second preset speed condition, the engine coolant temperature meets a second preset temperature range condition, and the electric water pump speed meets a second preset speed condition, before determining the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electric fan based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the process includes:

[0098] If the vehicle speed meets the second preset speed condition, the second basic thermostat duty cycle of the electronic thermostat and the second basic water pump duty cycle of the electronic water pump are determined based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature and target coolant temperature.

[0099] In one embodiment, if the vehicle speed meets the second preset speed condition, but the engine coolant temperature does not meet the second preset temperature range condition, and the electric water pump speed also does not meet the second preset speed condition, then the electric fan has not yet intervened in thermal management and has not performed any cooling action. Therefore, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the second basic thermostat duty cycle of the electronic thermostat and the second basic water pump duty cycle of the electric water pump are determined respectively. The steps for determining the second basic thermostat duty cycle of the electronic thermostat and the second basic water pump duty cycle of the electric water pump are the same as those for determining the first basic thermostat duty cycle of the electronic thermostat and the first basic water pump duty cycle of the electric water pump.

[0100] In one embodiment, such as Figure 6As shown, if the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the electric water pump speed meets the second preset speed condition, based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electric fan are determined, including:

[0101] S310, if the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the speed of the electronic water pump meets the second preset speed condition, the second thermostat duty cycle of the electronic thermostat is determined based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature.

[0102] In one embodiment, if the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the speed of the electronic water pump meets the second preset speed condition, since the electronic fan has been triggered to run, the second thermostat duty cycle of the electronic thermostat is determined based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, and the electronic fan works in conjunction with the electronic fan to cool the engine, avoiding energy waste and improving the vehicle's thermal management efficiency.

[0103] S320: If the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the speed of the electronic water pump meets the second preset speed condition, the second water pump duty cycle of the electronic water pump is determined based on the engine coolant temperature and the vehicle speed.

[0104] In one embodiment, if the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the speed of the electronic water pump meets the second preset speed condition, that is, the vehicle speed is less than 20 km / h, the engine coolant temperature is in the second preset temperature zone (95℃≤T), where T is the engine coolant temperature, and the speed of the electronic water pump is greater than or equal to 2500 rpm, the second water pump duty cycle of the electronic water pump is determined based on the engine coolant temperature and the vehicle speed. The water pump duty cycle when the vehicle speed is 0 is referred to in Table 5 as the second water pump duty cycle.

[0105] S330: If the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the electric water pump speed meets the second preset speed condition, the second fan duty cycle of the electric fan is determined based on the engine coolant temperature, vehicle speed, and ambient temperature.

[0106] In one embodiment, if the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature range condition, and the electric water pump speed meets the second preset speed condition, the second fan duty cycle of the electric fan is determined based on the engine coolant temperature, vehicle speed, and ambient temperature. This indicates that when the vehicle speed is not high, the engine heat is too great, and the electronic thermostat and electric water pump alone cannot provide sufficient cooling. To improve the engine's cooling efficiency, the electric fan is activated, and to utilize the oncoming natural wind brought by the reduced vehicle speed, the speeds of the electric water pump and electric fan are increased, improving air convection and accelerating the cooling of the coolant to remove engine heat more quickly. This maintains the engine coolant temperature range for normal engine operation, ensuring normal engine operation. The electronic thermostat, electric water pump, and electric fan work together for thermal management, improving the vehicle's thermal management efficiency.

[0107] In one embodiment, such as Figure 7 As shown, if the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature range condition, and the electric water pump speed meets the second preset speed condition, the second fan duty cycle of the electric fan is determined based on the engine coolant temperature, vehicle speed, and ambient temperature, including:

[0108] S331, if the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the electric water pump speed meets the second preset speed condition, the second basic fan duty cycle of the electric fan is determined based on the engine coolant temperature and vehicle speed.

[0109] In one embodiment, as shown in Table 8, if the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature range condition, and the electric water pump speed meets the second preset speed condition (i.e., the vehicle speed is less than 20 km / h, the engine coolant temperature is 95℃≤T, where T is the engine coolant temperature, and the electric water pump speed is greater than or equal to 2500 rpm), the second basic fan duty cycle of the electric fan is determined based on the engine coolant temperature and vehicle speed. For example, when the vehicle speed remains constant, as the engine coolant temperature rises from 95℃ to 105℃, the second basic fan duty cycle gradually increases. When the engine coolant temperature rises from 105℃ to 111℃, the second basic fan duty cycle remains at a constant high. Duty cycle; except for 95℃ and 97℃, when the engine coolant temperature remains constant, the duty cycle of the second basic fan remains constant as the vehicle speed increases from 0 to 20km / h. When the engine coolant temperature is 95℃ and 97℃, the duty cycle of the second basic fan decreases as the vehicle speed increases. For example, when the vehicle speed is 10km / h, the duty cycle of the second basic fan corresponding to an engine coolant temperature of 95℃ is 30%, and the duty cycle corresponding to an engine coolant temperature of 105℃ is 92%. When the engine coolant temperature is 95℃, the duty cycle of the second basic fan corresponding to a vehicle speed of 10km / h is 30%, and the duty cycle corresponding to a vehicle speed of 20km / h is 25%.

[0110] Table 8 Engine coolant temperature, vehicle speed, and corresponding second basic fan duty cycle

[0111]

[0112] S332, a second correction factor is determined based on ambient temperature. The second correction factor represents the correction factor corresponding to ambient temperature and vehicle speed.

[0113] In one embodiment, since the heat dissipation rate varies with different ambient temperatures, a second correction coefficient is determined based on the ambient temperature. This second correction coefficient represents the correction coefficient corresponding to the ambient temperature and vehicle speed, improving the control accuracy of the electric fan. As the ambient temperature increases, the second correction coefficient gradually increases because the higher the ambient temperature, the lower the heat dissipation rate using natural wind. Therefore, it is necessary to increase the duty cycle of the electric fan and increase its speed to quickly remove the engine heat, maintain the engine coolant temperature range for normal engine operation, and ensure normal engine operation. The electronic thermostat, electronic water pump, and electric fan work together for thermal management, improving the vehicle's thermal management efficiency.

[0114] In one embodiment, as shown in Table 9, the second correction factor is 0.75 when the ambient temperature is -40°C and 1.15 when the ambient temperature is 20°C.

[0115] Table 9 Ambient Temperature and Corresponding Second Correction Factor

[0116]

[0117]

[0118] S333, based on the duty cycle of the second base fan and the second correction coefficient, determines the duty cycle of the second fan.

[0119] In one embodiment, the duty cycle of the second fan is determined based on the product of the duty cycle of the second base fan and the second correction coefficient, thereby improving the control accuracy of the electronic fan.

[0120] The S400, based on the duty cycles of the first thermostat, the second thermostat, the first water pump, the second water pump, the first fan, and the second fan, coordinates the operation of the electronic water pump, the electronic thermostat, and the electronic fan to perform vehicle thermal management.

[0121] In one embodiment, based on the duty cycles of the first thermostat, the second thermostat, the first water pump, the second water pump, the first fan, and the second fan, and under the constraints of the driving scenario, the operation of the electronic water pump, the electronic thermostat, and the electronic fan are coordinated and controlled according to each duty cycle to achieve coordinated thermal management of the entire vehicle. This avoids overlapping energy consumption of some heat dissipation modules in the thermal management system, reduces vehicle energy consumption, and improves vehicle thermal management efficiency.

[0122] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0123] The beneficial effects of the embodiments of this application compared with the prior art are:

[0124] This application applies to a vehicle thermal management system, which includes an electronic thermostat, an electronic water pump, and an electronic fan. It acquires engine coolant temperature, engine speed, vehicle speed, ambient temperature, engine load, and a target coolant temperature. If the vehicle speed meets a first preset speed condition, the engine coolant temperature meets a first preset temperature range condition, and the electronic water pump speed meets a first preset speed condition, the system determines a first thermostat duty cycle, a first water pump duty cycle, and a first fan duty cycle based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature. If the vehicle speed meets a second preset speed condition, the engine coolant temperature meets a second preset temperature range condition, and the electronic water pump speed meets a second preset speed condition, the system determines a first thermostat duty cycle, a first water pump duty cycle, and a first fan duty cycle based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature. The system sets the water temperature and determines the duty cycles of the second thermostat, the second water pump, and the second fan. Based on these duty cycles, the operation of the electronic water pump, electronic thermostat, and electronic fan is coordinated to manage the vehicle's thermal performance. Compared to existing thermal management methods where each cooling module operates independently, this approach, based on driving scenario constraints and determining the duty cycles of the electronic fan, electronic water pump, and electronic thermostat separately for each parameter, and then controlling the electronic water pump, electronic thermostat, or electronic fan according to each duty cycle for coordinated vehicle thermal management, avoids overlapping energy consumption of some cooling modules in the thermal management system, reduces vehicle energy consumption, and improves vehicle thermal management efficiency.

[0125] Secondly, such as Figure 8 As shown, this embodiment provides a thermal management device applied to a vehicle thermal management system. The device includes:

[0126] The acquisition module 100 is used to acquire engine coolant temperature, engine speed, vehicle speed, ambient temperature, engine load, and target coolant temperature.

[0127] The first determining module 200 is used to determine the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electronic fan based on the engine water temperature, vehicle speed, engine load, engine speed, ambient temperature, and target water temperature, if the vehicle speed meets the first preset vehicle speed condition, the engine water temperature meets the first preset temperature zone condition, and the speed of the electronic water pump meets the first preset speed condition.

[0128] The second determining module 300 is used to determine the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electronic fan based on the engine water temperature, vehicle speed, engine load, engine speed, ambient temperature, and target water temperature, if the vehicle speed meets the second preset vehicle speed condition, the engine water temperature meets the second preset temperature zone condition, and the speed of the electronic water pump meets the second preset speed condition.

[0129] The control module 400 is used to coordinate the operation of the electronic water pump, electronic thermostat and electronic fan based on the duty cycle of the first thermostat, the duty cycle of the second thermostat, the duty cycle of the first water pump, the duty cycle of the second water pump, the duty cycle of the first fan and the duty cycle of the second fan, so as to perform vehicle thermal management.

[0130] It should be noted that the information interaction and execution process between the above-mentioned devices / modules are based on the same concept as the method embodiments of this application. For details on their specific functions and technical effects, please refer to the method embodiments section, and they will not be repeated here.

[0131] Thirdly, this embodiment provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method as described in any one of the first aspects.

[0132] Fourthly, this embodiment provides a vehicle including a control device as described in the second aspect, the control device performing the method as described in any one of the first aspects.

[0133] It is understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant descriptions in the first aspect above, and will not be repeated here.

[0134] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of this application can be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms.

[0135] The computer-readable medium may include at least: any entity or device capable of carrying computer program code to a photographic device / terminal device, recording media, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media. Examples include USB flash drives, portable hard drives, magnetic disks, or optical discs. In some jurisdictions, according to legislation and patent practice, computer-readable media may not be electrical carrier signals or telecommunication signals.

[0136] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0137] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0138] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A method for thermal management, characterized in that, This is applied to a vehicle thermal management system, which includes an electronic thermostat, an electronic water pump, and an electronic fan, and comprises: The system acquires engine coolant temperature, engine speed, vehicle speed, ambient temperature, engine load, and target coolant temperature; the target coolant temperature is determined based on the engine speed, engine load, and ambient temperature. If the vehicle speed meets a first preset speed condition, the engine coolant temperature meets a first preset temperature zone condition, and the electric water pump speed meets a first preset speed condition, based on the engine coolant temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target coolant temperature, the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electric fan are determined. The first preset speed condition is that the vehicle speed is greater than or equal to a preset speed threshold. The first preset temperature zone condition is that the engine coolant temperature is greater than or equal to a first preset temperature threshold, and the duration for which the engine coolant temperature is greater than or equal to the first preset temperature threshold is greater than or equal to a first preset duration threshold. The first preset speed condition is that the electric water pump speed is greater than or equal to a preset water pump speed, and the electric water pump speed is greater than or equal to a preset water pump speed. The duration of the rotational speed is greater than or equal to the second preset duration threshold. If the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the rotational speed of the electronic water pump meets the first preset rotational speed condition, before determining the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electronic fan based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, if the vehicle speed meets the first preset vehicle speed condition, but the engine coolant temperature does not meet the first preset temperature zone condition, and the rotational speed of the electronic water pump also does not meet the first preset rotational speed condition, then the electronic fan does not intervene in thermal management. Based on the engine coolant temperature, vehicle speed, engine load, engine speed, ambient temperature, and target coolant temperature, the first basic thermostat duty cycle of the electronic thermostat and the first basic water pump duty cycle of the electronic water pump are determined respectively. If the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the electric water pump speed meets the second preset speed condition, based on the engine coolant temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target coolant temperature, the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electric fan are determined; the vehicle speed under the second preset speed condition is less than the vehicle speed under the first preset speed condition; the second preset temperature zone condition is that the engine coolant temperature is greater than or equal to a second preset temperature threshold, the second preset temperature threshold is less than the first preset temperature threshold, and the duration for which the engine coolant temperature is greater than or equal to the second preset temperature threshold is greater than or equal to a first preset duration threshold; the second preset speed condition is that the speed of the electric water pump is greater than or equal to a preset water pump speed, and the... The duration for which the speed of the electronic water pump is greater than or equal to the preset water pump speed is greater than or equal to the second preset duration threshold; if the vehicle speed meets the second preset vehicle speed condition, the engine water temperature meets the second preset temperature zone condition, and the speed of the electronic water pump meets the second preset speed condition, before determining the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electronic fan based on the engine water temperature, vehicle speed, engine load, engine speed, ambient temperature, and target water temperature, including: if the vehicle speed meets the second preset vehicle speed condition, but the engine water temperature does not meet the second preset temperature zone condition, and the speed of the electronic water pump also does not meet the second preset speed condition, then the electronic fan does not intervene in thermal management, and the second basic thermostat duty cycle of the electronic thermostat and the second basic water pump duty cycle of the electronic water pump are determined based on the engine water temperature, vehicle speed, engine load, engine speed, ambient temperature, and target water temperature respectively; Based on the duty cycle of the first thermostat, the duty cycle of the second thermostat, the duty cycle of the first water pump, the duty cycle of the second water pump, the duty cycle of the first fan, and the duty cycle of the second fan, the operation of the electronic water pump, the electronic thermostat, and the electronic fan are coordinated to perform vehicle thermal management.

2. The method as described in claim 1, characterized in that, If the vehicle speed meets a first preset vehicle speed condition, the engine coolant temperature meets a first preset temperature range condition, and the electric water pump speed meets a first preset speed condition, the first thermostat duty cycle of the electronic thermostat, the first water pump duty cycle of the electronic water pump, and the first fan duty cycle of the electric fan are determined based on the engine coolant temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target coolant temperature, including: If the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the speed of the electronic water pump meets the first preset speed condition, the first thermostat duty cycle of the electronic thermostat is determined based on the engine coolant temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target coolant temperature. If the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the rotation speed of the electronic water pump meets the first preset rotation speed condition, the first water pump duty cycle of the electronic water pump is determined based on the engine coolant temperature and the vehicle speed. If the vehicle speed meets the first preset speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the rotation speed of the electronic water pump meets the first preset rotation speed condition, the first fan duty cycle of the electronic fan is determined based on the engine coolant temperature, the vehicle speed, and the ambient temperature.

3. The method as described in claim 2, characterized in that, If the vehicle speed meets a first preset speed condition, the engine coolant temperature meets a first preset temperature range condition, and the electric water pump speed meets a first preset speed condition, the first fan duty cycle of the electric fan is determined based on the engine coolant temperature, the vehicle speed, and the ambient temperature, including: If the vehicle speed meets the first preset vehicle speed condition, the engine coolant temperature meets the first preset temperature zone condition, and the rotation speed of the electronic water pump meets the first preset rotation speed condition, the first basic fan duty cycle of the electronic fan is determined based on the engine coolant temperature and the vehicle speed. A first correction factor is determined based on the ambient temperature, and the first correction factor represents a correction factor corresponding to the ambient temperature and the vehicle speed. The duty cycle of the first fan is determined based on the duty cycle of the first base fan and the first correction coefficient.

4. The method as described in claim 1, characterized in that, If the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the electric water pump speed meets the second preset speed condition, based on the engine coolant temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target coolant temperature, the second thermostat duty cycle of the electronic thermostat, the second water pump duty cycle of the electronic water pump, and the second fan duty cycle of the electric fan are determined, including: If the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the speed of the electronic water pump meets the second preset speed condition, the second thermostat duty cycle of the electronic thermostat is determined based on the engine coolant temperature, the vehicle speed, the engine load, the engine speed, the ambient temperature, and the target coolant temperature. If the vehicle speed meets the second preset vehicle speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the rotational speed of the electronic water pump meets the second preset rotational speed condition, the second water pump duty cycle of the electronic water pump is determined based on the engine coolant temperature and the vehicle speed. If the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the rotation speed of the electronic water pump meets the second preset rotation speed condition, the second fan duty cycle of the electronic fan is determined based on the engine coolant temperature, the vehicle speed, and the ambient temperature.

5. The method as described in claim 1, characterized in that, If the vehicle speed meets the second preset speed condition, the engine coolant temperature meets the second preset temperature range condition, and the electric water pump speed meets the second preset speed condition, the second fan duty cycle of the electric fan is determined based on the engine coolant temperature, the vehicle speed, and the ambient temperature, including: If the vehicle speed meets the second preset vehicle speed condition, the engine coolant temperature meets the second preset temperature zone condition, and the rotation speed of the electronic water pump meets the second preset rotation speed condition, the second basic fan duty cycle of the electronic fan is determined based on the engine coolant temperature and the vehicle speed. A second correction factor is determined based on the ambient temperature, and the second correction factor represents a correction factor corresponding to the ambient temperature and the vehicle speed. The duty cycle of the second fan is determined based on the duty cycle of the second base fan and the second correction factor.

6. A vehicle, characterized in that, It includes an engine and a vehicle thermal management system, the vehicle thermal management system performing the method as described in any one of claims 1 to 5.

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