Temperature control methods, devices, equipment, and media

Abstract

This application discloses a temperature control method, apparatus, device, and medium. The method includes: acquiring EGR parameters corresponding to a vehicle engine, whereby the EGR parameters characterize the current intake air state; calculating a first desired temperature value of the cooled exhaust gas obtained after the vehicle's exhaust gas passes through an EGR cooler, and a second desired temperature value of the cooled air-fuel mixture obtained after the vehicle's air-fuel mixture passes through an intercooler, based on the EGR parameters; wherein the air-fuel mixture is obtained by mixing the cooled exhaust gas with the engine's intake air; adjusting the flow rate of the coolant in the EGR cooler based on the temperature of the cooled exhaust gas and the first desired temperature value to control the temperature of the cooled exhaust gas; and adjusting the flow rate of the coolant in the intercooler based on the temperature of the cooled air-fuel mixture and the second desired temperature value to control the temperature of the cooled air-fuel mixture. This method achieves more accurate temperature control for exhaust gas recirculation.

Description

Technical Field

[0001] This application relates to the field of automotive technology, and more specifically, to a temperature control method, a temperature control device, an electronic device, and a computer-readable medium. Background Technology

[0002] A vehicle engine is a machine that converts other forms of energy into mechanical energy. Engines typically include internal combustion engines, external combustion engines, jet engines, and electric motors.

[0003] Current engines support Exhaust Gas Recirculation (EGR) technology, which re-cools a portion of the exhaust gases after combustion, thereby reducing nitrogen oxides in the exhaust and improving fuel economy under partial load. However, when the cooled exhaust temperature is too low, condensation may occur. If this condensation flows into the engine cylinders, it can cause poor combustion or even misfire.

[0004] Therefore, how to achieve temperature control for exhaust gas recirculation is an urgent problem to be solved. Summary of the Invention

[0005] The embodiments of this application provide a temperature control method and apparatus, electronic device, and computer-readable medium, which realize temperature control of exhaust gas recirculation with higher accuracy.

[0006] In a first aspect, embodiments of this application provide a temperature control method, including:

[0007] Obtain the EGR parameters corresponding to the vehicle engine, whereby the EGR parameters are used to characterize the current intake state;

[0008] The first desired temperature value of the cooled exhaust gas obtained after the vehicle's exhaust gas passes through the EGR cooler is calculated based on the EGR parameters, and the second desired temperature value of the cooled air-fuel mixture obtained after the vehicle's air-fuel mixture passes through the intercooler is calculated based on the EGR parameters; wherein, the air-fuel mixture is obtained by mixing the cooled exhaust gas with the engine's intake air.

[0009] The flow rate of the EGR coolant is adjusted based on the temperature of the cooling exhaust gas and the first desired temperature value to control the temperature of the cooling exhaust gas, and the flow rate of the intercooler coolant is adjusted based on the temperature of the cooling mixture and the second desired temperature value to control the temperature of the cooling mixture.

[0010] In one embodiment of this application, based on the aforementioned scheme, the engine speed, torque, and coolant temperature are obtained; if the engine speed is within a preset safe speed range, the torque is within a preset safe torque range, and the coolant temperature is greater than or equal to a preset safe coolant temperature threshold, then the EGR parameters corresponding to the vehicle engine are obtained.

[0011] In one embodiment of this application, based on the aforementioned scheme, the EGR circulation rate and EGR pressure are obtained, wherein the EGR circulation rate and the EGR pressure are calculated based on the EGR parameters; and based on the EGR circulation rate and the EGR pressure, the first desired temperature value of the cooled exhaust gas obtained after the vehicle's exhaust gas passes through the EGR cooler is calculated.

[0012] In one embodiment of this application, based on the aforementioned scheme, the current intake air flow rate, the current temperature and humidity of the intake air, and the current EGR cycle rate of the engine are obtained; based on the current intake air flow rate, the current temperature and humidity of the intake air, and the current EGR cycle rate, a second desired temperature value of the air-fuel mixture obtained after passing through the intercooler is calculated.

[0013] In one embodiment of this application, based on the aforementioned scheme, if the temperature of the cooling exhaust gas is less than the first desired temperature value, the opening of the electronic water pump is adjusted to reduce the flow rate of the coolant in the EGR cooler; wherein, the electronic water pump is connected to the EGR cooler to control the flow rate of the coolant flowing to the EGR cooler.

[0014] In one embodiment of this application, based on the aforementioned scheme, the current opening value of the electronic water pump and the first preset adjustment step size of the electronic water pump are obtained; the difference between the current opening value of the electronic water pump and the first preset adjustment step size is calculated to obtain a first target opening value; wherein, when the electronic water pump is at the first target opening value, the temperature of the cooling exhaust gas is greater than or equal to the first desired temperature value; the current opening value of the electronic water pump is adjusted to the first target opening value.

[0015] In one embodiment of this application, based on the aforementioned scheme, if the temperature of the cooling mixture is less than the second desired temperature value, the opening of the intercooler throttle valve is adjusted to reduce the flow rate of the intercooler coolant; wherein, the intercooler throttle valve is connected to the intercooler to control the flow rate of coolant flowing to the intercooler.

[0016] In one embodiment of this application, based on the aforementioned scheme, the current opening value of the intercooler throttle valve and the second preset adjustment step size of the intercooler throttle valve are obtained; the current opening value of the intercooler throttle valve and the second preset adjustment step size are summed to obtain a second target opening value; wherein, when the intercooler throttle valve is at the second target opening value, the temperature of the cooling mixture is greater than or equal to the second desired temperature value; the current opening value of the intercooler throttle valve is adjusted to the second target opening value.

[0017] Secondly, embodiments of this application provide a temperature control device, including:

[0018] The acquisition unit is used to acquire the EGR parameters corresponding to the vehicle engine, and the EGR parameters are used to characterize the current intake state.

[0019] The calculation unit is used to calculate, based on the EGR parameters, a first desired temperature value of the cooled exhaust gas obtained after the vehicle's exhaust gas passes through the EGR cooler, and a second desired temperature value of the cooled air-fuel mixture obtained after the vehicle's air-fuel mixture passes through the intercooler; wherein the air-fuel mixture is obtained by mixing the cooled exhaust gas with the engine's intake air;

[0020] The control unit is configured to adjust the flow rate of the EGR cooler coolant based on the temperature of the cooling exhaust gas and a first desired temperature value to control the temperature of the cooling exhaust gas, and to adjust the flow rate of the intercooler coolant based on the temperature of the mixed gas and a second desired temperature value to control the temperature of the mixed gas.

[0021] Thirdly, embodiments of this application provide an electronic device, including one or more processors; and a memory for storing one or more programs, which, when executed by the one or more processors, cause the electronic device to implement the temperature control method described above.

[0022] Fourthly, embodiments of this application provide a computer-readable medium having a computer program stored thereon, which, when executed by a processor, implements the temperature control method described above.

[0023] In the technical solutions provided by the embodiments of this application:

[0024] A first desired temperature value for the exhaust gas can be calculated. This first desired temperature value is the temperature that the cooled exhaust gas should reach, calculated based on the current EGR parameters. Similarly, a second desired temperature value is the temperature that the cooled air-fuel mixture should reach, calculated based on the current EGR parameters. By comparing the actual temperature of the cooled exhaust gas with the first desired temperature value, and comparing the actual temperature of the cooled air-fuel mixture with the second desired temperature value, it can be determined whether the temperatures of the cooled exhaust gas and the cooled air-fuel mixture are lower than the corresponding desired temperature values. If so, at least one of the flow rates of the EGR cooler and the intercooler needs to be controlled to control the actual temperatures of the cooled exhaust gas and the cooled air-fuel mixture, and to reduce or prevent the generation of condensate. In this method, controlling the coolant flow rate to reduce the cooling effect of the EGR cooler or the intercooler is easier to control, avoids temperature fluctuations caused by the complex operating environment of the current engine, has a better control effect, achieves temperature control of exhaust gas recirculation, and has higher accuracy.

[0025] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of an implementation environment in which embodiments of this application can be applied;

[0027] Figure 2 This is a flowchart illustrating a temperature control method in an exemplary embodiment of this application;

[0028] Figure 3 This is a flowchart illustrating a temperature control method in another exemplary embodiment of this application;

[0029] Figure 4 This is a flowchart illustrating a temperature control method in another exemplary embodiment of this application;

[0030] Figure 5 This is a flowchart illustrating a temperature control method in another exemplary embodiment of this application;

[0031] Figure 6 This is a flowchart illustrating a temperature control method in another exemplary embodiment of this application;

[0032] Figure 7 This is a flowchart illustrating a temperature control method in another exemplary embodiment of this application;

[0033] Figure 8 This is a flowchart illustrating a temperature control method in another exemplary embodiment of this application;

[0034] Figure 9This is a flowchart illustrating a temperature control method in another exemplary embodiment of this application;

[0035] Figure 10 This is a schematic diagram illustrating a simplified water flow loop water temperature control for an intercooler, as shown in an exemplary embodiment of this application.

[0036] Figure 11 This is a flowchart illustrating a temperature control method in another exemplary embodiment of this application;

[0037] Figure 12 This is a block diagram of a temperature control device according to an embodiment of this application;

[0038] Figure 13 This is a schematic diagram of the structure of a computer system suitable for implementing the electronic devices of the present application embodiments. Detailed Implementation

[0039] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0040] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0041] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0042] It should also be noted that "multiple" as mentioned in this application refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0043] The temperature control methods, devices, electronic equipment, and computer-readable media proposed in this application relate to the field of automotive technology, and these embodiments will be described in detail below.

[0044] Please see Figure 1 , Figure 1 This is a schematic diagram of one implementation environment involved in this application. For example... Figure 1 As shown, the implementation environment mainly includes an EGR valve 110, an EGR cooler 120, an electric water pump 130, an intercooler 140, an intercooler throttle valve 150, an engine 160, and a cylinder 170. The EGR valve 110, EGR cooler 120, electric water pump 130, intercooler 140, intercooler throttle valve 150, and cylinder 170 may be included within the engine 160; that is, the temperature control method of this embodiment may occur within the engine 160. The intercooler 140 may be a water-cooled intercooler, typically used in conjunction with a turbocharger, also known as a turbocharged water cooler. The method in this embodiment is equally applicable to both intercoolers and turbocharged water coolers.

[0045] Exhaust gas can enter through EGR valve 110, and the opening value of EGR valve 110 determines the amount of exhaust gas entering. Further, after the exhaust gas reaches EGR cooler 120, it is cooled to obtain cooled exhaust gas. The cooled exhaust gas can be mixed with the engine's intake air to obtain a mixed gas. The intercooler 140 then cools the mixed gas to obtain a cooled air-fuel mixture, which can then be input into the cylinder.

[0046] In this implementation environment, the engine 160 includes coolant, which can be connected to the EGR cooler 120, the intercooler 140, and other devices via other water lines. An electric water pump 130 controls the flow rate of coolant into the EGR cooler, and an intercooler throttle valve 150 controls the flow rate of coolant into the intercooler.

[0047] In this embodiment, the system may further include an EGR throttle valve, an air filter, an EGR differential pressure sensor, an EGR temperature sensor, an intake air temperature sensor, an intake air humidity sensor, and a boost pressure temperature sensor. The air filter is connected after the EGR valve 110, the EGR throttle valve is connected after the air filter, and before the EGR cooler 120; the EGR differential pressure sensor and the intake air temperature and humidity sensor can be installed before the EGR cooler 120; the EGR temperature sensor and the boost pressure temperature sensor can be installed after the EGR cooler 120 and before the intercooler 140. Optionally, the intake air temperature sensor and the intake air humidity sensor can be integrated together and referred to as an intake air temperature and humidity sensor. The vehicle can utilize various sensors to measure the temperature, humidity, and pressure of the exhaust gas before entering the EGR cooler 120; the temperature, humidity, and pressure of the cooled exhaust gas; the temperature, humidity, and pressure of the air-fuel mixture; and the temperature, humidity, and pressure of the cooled air-fuel mixture.

[0048] In this embodiment of the application, the implementation environment may also include other sensors, as shown in the embodiments of the application. Figure 1 The sensors and devices shown and mentioned above are examples only; other sensors and devices are not limited.

[0049] Figure 2 This is a flowchart illustrating a temperature control method according to an exemplary embodiment. Figure 2 As shown, in an exemplary embodiment, the method may include steps S210 to S230, and this embodiment may be specifically implemented by the vehicle's Electronic Control Unit (ECU). Steps S210 to S230 are described in detail below:

[0050] Step S210: Obtain the EGR parameter corresponding to the vehicle engine. The EGR parameter is used to characterize the current intake state.

[0051] The EGR parameter can include the opening value of the EGR valve, the opening value of the EGR throttle valve, the temperature and pressure of the gases before and after the EGR cooler (i.e., the temperature and pressure of exhaust gas and cooled exhaust gas), the intake air temperature and relative humidity, and the temperature and pressure of the gases before and after the intercooler (i.e., the temperature and pressure of the air-fuel mixture and cooled air-fuel mixture). This EGR parameter can be collected by various sensors controlled by the ECU, and it represents the vehicle's current real-time EGR parameter, reflecting the current intake air status.

[0052] In this embodiment, a safety check can be performed on the engine before obtaining the EGR parameters corresponding to the vehicle engine. After the vehicle is powered on, the EGR valve, EGR throttle valve, EGR differential pressure sensor, EGR temperature sensor, intake air temperature sensor, intake air humidity sensor, and boost pressure temperature sensor can be checked for proper functioning. Specifically, the valves are checked to ensure they can open and close normally to control fluid flow, and the sensors are checked to ensure they can measure the corresponding data. If all valves and sensors are functioning normally, the next safety check can be performed. If any valve or sensor malfunctions, a fault mode can be triggered.

[0053] Furthermore, the engine speed, torque, and coolant temperature can be used to determine whether the EGR function can be activated.

[0054] The aforementioned fault modes refer to the following: if any one of the intake air temperature sensor, EGR temperature sensor, or gas temperature sensor malfunctions, the EGR function cannot be activated, and the EGR valve will be closed. In this case, exhaust gas cooling and recovery will not occur. However, if none of these sensors malfunction, but the humidity sensor measuring the intake air malfunctions, the humidity value of the intake air can be assigned based on the current intake air temperature. For example, if the detected intake air temperature is greater than or equal to 20°C, the humidity value can be assigned as 90%; if the intake air temperature is less than 20°C, the humidity value can be assigned as 100%.

[0055] It should be noted that, generally, the intake air temperature sensor and its corresponding relative humidity sensor are located behind the engine air filter to characterize the actual intake air conditions. In special cases, the intake air temperature sensor and its corresponding relative humidity sensor can be located in front of the vehicle's intake module, but the measured values ​​will need to be corrected.

[0056] Step S220: Calculate the first desired temperature value of the cooled exhaust gas obtained after the vehicle's exhaust gas passes through the EGR cooler based on the EGR parameters, and calculate the second desired temperature value of the cooled air-fuel mixture obtained after the vehicle's air-fuel mixture passes through the intercooler based on the EGR parameters; wherein, the air-fuel mixture is obtained by mixing the cooled exhaust gas with the engine's intake air.

[0057] The first desired temperature value is calculated by the ECU to be the temperature the exhaust gas should reach after being cooled by the EGR cooler. Similarly, the second desired temperature value is calculated by the ECU to be the temperature the air-fuel mixture should reach after being cooled by the intercooler. The intake air can be fresh air, that is, gas drawn into the engine from outside the vehicle.

[0058] Step S230: Adjust the flow rate of the EGR cooler coolant based on the temperature of the cooling exhaust gas and the first desired temperature value to control the temperature of the cooling exhaust gas, and adjust the flow rate of the intercooler coolant based on the temperature of the cooling mixture and the second desired temperature value to control the temperature of the cooling mixture.

[0059] Condensation may occur when the temperature of both the cooling exhaust gas and the cooling mixture is too low. Therefore, it is necessary to control the temperature of both to avoid excessively low temperatures.

[0060] The ECU compares the temperature of the cooled exhaust gas with a first desired temperature value to determine whether the flow rate of the EGR cooler needs to be controlled. The ECU controls the EGR cooler flow rate by adjusting the opening of the electric water pump. The temperature of the cooled exhaust gas refers to its actual temperature after cooling by the EGR cooler. When the electric water pump opening decreases, the EGR cooler flow rate decreases. When the EGR cooler flow rate decreases, the heat exchange between the cooler and the outside environment decreases, weakening the cooling effect of the EGR cooler and causing the actual temperature of the cooled exhaust gas to rise. The ECU can be programmed to stop reducing the electric water pump opening once the actual temperature of the cooled exhaust gas reaches the first desired temperature value, thus preventing the actual temperature of the cooled exhaust gas from rising further.

[0061] The ECU compares the temperature of the air-fuel mixture with a second desired temperature value to determine whether the intercooler coolant flow rate needs to be controlled. The ECU controls the intercooler coolant flow rate by adjusting the opening of the throttle valve. The air-fuel mixture temperature refers to the actual temperature of the mixture after cooling by the intercooler. A smaller throttle valve opening reduces the intercooler coolant flow rate. A smaller flow rate reduces heat exchange between the coolant and the external environment, weakening the intercooler's cooling effect and potentially causing the actual air-fuel mixture temperature to rise. The ECU can be programmed to stop reducing the throttle valve opening once the actual air-fuel mixture temperature reaches the second desired temperature value, thus preventing further temperature increases.

[0062] This method allows control of at least one of the coolant flow rates in the EGR cooler and intercooler, based on the temperatures of the exhaust gas and the air-fuel mixture. This control, in turn, regulates the actual temperature of the exhaust gas and air-fuel mixture, thereby reducing or preventing condensation. Controlling the coolant flow rate to reduce the cooling effect of the EGR cooler or intercooler is easier to manage, avoids temperature fluctuations caused by the complex operating environment of modern engines, and provides better control. It achieves more accurate and precise temperature control of the exhaust gas recirculation.

[0063] Please see Figure 3 , Figure 3 A flowchart illustrating a temperature control method as another exemplary embodiment of this application. (See attached flowchart.) Figure 3 As shown, in an exemplary embodiment, the temperature control method can be implemented by the vehicle's ECU, including steps S310 to S320 and steps S220 to S230.

[0064] Steps S310 to S320 will be described in detail below:

[0065] Step S310: Obtain the engine speed, torque and engine coolant temperature.

[0066] The ECU can detect the engine's speed and torque to obtain the corresponding speed and torque values, and can also call the temperature sensor to detect the temperature of the coolant in the engine.

[0067] Step S320: If the engine speed is within the preset safe speed range, the torque is within the preset safe torque range, and the coolant temperature is greater than or equal to the preset safe coolant temperature threshold, then obtain the EGR parameters corresponding to the vehicle engine.

[0068] The preset safe speed range, preset safe torque range, and preset safe coolant temperature threshold can be set by those skilled in the art. If the speed, torque, and coolant temperature in the engine are all within their corresponding safe ranges, it indicates that the EGR function's activation requirements are met, and exhaust gas can be cooled and recirculated. The preset safe coolant temperature threshold can be expressed as T. wu If the temperature of the coolant in the engine is lower than this T wu This indicates that the engine is in a cold start state and the EGR function cannot be used.

[0069] Optionally, the ECU can determine whether the engine speed is 0; if it is 0, the EGR function will not be activated.

[0070] Optionally, the ECU can also acquire the temperature and relative humidity (PHI) of the exhaust gas as it enters the EGR cooler. r If the temperature of the exhaust gas is less than the threshold T r Or its relative humidity PHI r >PHI wu Then, the EGR function can be activated when the engine speed, torque, and coolant temperature are all within their respective safe ranges.

[0071] In this embodiment of the application, since the ECU can control the temperature of the gas by controlling the flow rate of the coolant after the EGR function is enabled, it can prevent the generation of condensate and thus protect the engine from the damage caused by condensate. Therefore, enabling the EGR function can also be called enabling the protection mode.

[0072] It should be noted that steps S220 to S230 have already been described in the following text. Figure 2 The embodiments shown are described in detail, and will not be repeated here.

[0073] This method allows the EGR function to be activated to recirculate exhaust gases only when the engine's current state meets certain conditions. This ensures that the engine can recirculate exhaust gases safely, which helps protect the engine and extend its service life.

[0074] Please see Figure 4 , Figure 4 A flowchart illustrating a temperature control method as another exemplary embodiment of this application. (See attached flowchart.) Figure 4 As shown, in an exemplary embodiment, the temperature control method can be implemented by the vehicle's ECU, including steps S210, S410 to S420 and S230.

[0075] Steps S410 to S420 will be described in detail below:

[0076] Step S410: Obtain the EGR circulation rate and EGR pressure, which are calculated based on the EGR parameters.

[0077] The EGR parameters include the EGR valve opening value, the EGR throttle valve opening value, the temperature and pressure of the gases before and after the EGR cooler (i.e., the temperature and pressure of exhaust gas and cooled exhaust gas), the intake air temperature and relative humidity, and the temperature and pressure of the gases before and after the intercooler (i.e., the temperature and pressure of the air-fuel mixture and cooled air-fuel mixture). The ECU can filter these parameter values ​​and calculate the EGR cycle rate N. egr and EGR pressure P egr , where P egr Specifically, it can be the relative pressure of EGR.

[0078] Step S420: Calculate the first desired temperature value of the cooled exhaust gas obtained after the vehicle's exhaust gas passes through the EGR cooler, based on the EGR circulation rate and EGR pressure.

[0079] The first desired temperature value can be expressed as T. egr_set T egr_set =[f(N egr )f(P egr )]. Among them, the f(N) egr ) indicates that it refers to N egr The function, similarly, f(P) egr ) indicates that it refers to P egr The embodiments of this application do not limit the specific expression of the above functions.

[0080] It should be noted that steps S210 and S230 have already been described in the following text. Figure 2 The embodiments shown are described in detail, and will not be repeated here.

[0081] This method, by combining multiple parameter values ​​included in the EGR parameters to calculate the first expected temperature value, can make the first expected temperature value more accurate. This first expected temperature value can serve as the threshold for condensation formation in the cooling exhaust gas. If the actual temperature of the cooling exhaust gas is lower than this first expected temperature value, condensation may occur. Therefore, improving the calculation accuracy of the first expected temperature value can avoid condensation formation caused by calculation errors.

[0082] Please see Figure 5 , Figure 5 A flowchart illustrating a temperature control method as another exemplary embodiment of this application. (See attached flowchart.) Figure 5 As shown, in an exemplary embodiment, the temperature control method can be implemented by the vehicle's ECU, including steps S210, S510 to S520 and S230.

[0083] Steps S510 to S520 will be described in detail below:

[0084] Step S510: Obtain the current intake air flow rate, current intake air temperature and humidity, and current EGR cycle rate of the engine.

[0085] The current intake air flow rate can be expressed as Flow. air This refers to the real-time airflow; the current temperature of the intake air can be expressed as T. air The current humidity of the intake air can be expressed as PHI. air .

[0086] Step S520: Based on the current intake air flow rate, the current intake air temperature and humidity, and the current EGR cycle rate, calculate the second desired temperature value of the cooled air mixture obtained after the vehicle's air-fuel mixture passes through the intercooler.

[0087] The second desired temperature value can be expressed as T. cac_set Its calculation formula can be T cac_set =f[f(N) egr ,Flow air )+f(T air PHI air ,Flow air )]. Where, f(N egr ,Flow air ) indicates that it refers to N egr and Flow air The function; f(T) air PHI air ,Flow air ) indicates that it refers to T air PHI air and Flowair The function f[f(N) egr ,Flow air )+f(T air PHI air ,Flow air )] represents the expression for f(N) egr ,Flow air ) and f(T air PHI air ,Flow air A function that sums () to (). This application does not limit the specific expression of the above function in its embodiments.

[0088] It should be noted that steps S210 and S230 have already been described in the following text. Figure 2 The embodiments shown are described in detail, and will not be repeated here.

[0089] This method, by combining multiple parameter values ​​included in the EGR parameters to calculate the second expected temperature value, can make the second expected temperature value more accurate. This second expected temperature value can serve as the threshold for condensation formation in the cooling mixture. If the actual temperature of the cooling mixture is lower than this second expected temperature value, condensation may occur. Therefore, improving the calculation accuracy of the second expected temperature value can avoid condensation caused by calculation errors.

[0090] Please see Figure 6 , Figure 6 A flowchart illustrating a temperature control method as another exemplary embodiment of this application. (See attached flowchart.) Figure 6 As shown, in an exemplary embodiment, the temperature control method can be implemented by the vehicle's ECU, including steps S210 to S220 and step S610.

[0091] The following is a detailed description of step S610:

[0092] Step S610: If the temperature of the cooling exhaust gas is lower than the first desired temperature value, adjust the opening of the electronic water pump to reduce the flow rate of the coolant in the EGR cooler; wherein, the electronic water pump is connected to the EGR cooler to control the flow rate of the coolant flowing to the EGR cooler.

[0093] The temperature of the cooling exhaust gas is the actual temperature of the cooling exhaust gas, which can be expressed as T. egr_act If T egr_act <T egr_setIn other words, if the temperature of the exhaust gas is too low, condensation may occur. Therefore, it is necessary to adjust the opening of the electric water pump to reduce the flow rate of the EGR cooler, thereby reducing the heat exchange between the EGR cooler and the outside environment, reducing the cooling effect of the EGR cooler on the exhaust gas, and increasing the temperature of the exhaust gas. The electric water pump is connected to the EGR cooler; the larger the opening value of the electric water pump, the greater the flow rate of coolant to the EGR cooler, and the better the cooling effect of the EGR cooler. Conversely, the smaller the opening value, the worse the cooling effect of the EGR cooler.

[0094] It should be noted that steps S210 to S220 have already been described in detail below. Figure 2 The embodiments shown are described in detail, and will not be repeated here.

[0095] This method controls the flow rate of coolant to the EGR cooler by using an electronic water pump, thereby controlling the cooling effect of the EGR cooler on the exhaust gas and helping to control the temperature of the cooled exhaust gas.

[0096] Please see Figure 7 , Figure 7 A flowchart illustrating a temperature control method as another exemplary embodiment of this application. (See attached flowchart.) Figure 7 As shown, in an exemplary embodiment, the temperature control method can be implemented by the vehicle's ECU, including steps S210 to S220 and steps S710 to S730.

[0097] Steps S710 to S730 will be described in detail below:

[0098] Step S710: Obtain the current opening value of the electronic water pump and the first preset adjustment step size of the electronic water pump.

[0099] The first preset adjustment step size can be designed by those skilled in the art, for example, 1%.

[0100] Step S720: The current opening value of the electronic water pump is calculated by subtracting the first preset adjustment step size to obtain the first target opening value; wherein, when the electronic water pump is at the first target opening value, the temperature of the cooling exhaust gas is greater than or equal to the first desired temperature value.

[0101] Specifically, the electric water pump first subtracts a first preset adjustment step from its current opening value. At this point, the flow rate of the EGR cooler decreases, and the EGR cooler then cools the exhaust gas. The ECU can then measure the temperature of the cooled exhaust gas after the electric water pump's opening value has changed. If the temperature of the cooled exhaust gas is still lower than the first desired temperature value, the electric water pump needs to continue subtracting the first preset adjustment step from its opening value until the temperature of the cooled exhaust gas is greater than or equal to the first desired temperature value. When the temperature of the cooled exhaust gas is greater than or equal to the first desired temperature value, the opening value of the electric water pump is the first target opening value.

[0102] For example, assuming the current opening value of the electric water pump is 80%, the first desired temperature is 10°C, the first preset adjustment step size is 2%, and the current temperature of the cooling exhaust gas is 7°C. First, the ECU adjusts the opening value of the electric water pump to 78%, and detects that the adjusted temperature of the cooling exhaust gas is 8°C. Second, the ECU adjusts the opening value of the electric water pump to 76%, and detects that the adjusted temperature of the cooling exhaust gas is 9°C. Third, the ECU adjusts the opening value of the electric water pump to 74%, and detects that the adjusted temperature of the cooling exhaust gas is 10°C, thus achieving the first desired temperature value. Therefore, 74% can be used as the first target opening value.

[0103] Step S730: Adjust the current opening value of the electronic water pump to the first target opening value.

[0104] It should be noted that steps S210 to S220 have already been described in detail below. Figure 2 The embodiments shown are described in detail, and will not be repeated here.

[0105] This method controls the flow rate of coolant in the EGR cooler by adjusting the opening of the electronic water pump. The control method is easy to operate and relatively stable, which can improve the accuracy of temperature control of exhaust gas.

[0106] Please see Figure 8 , Figure 8 A flowchart illustrating a temperature control method as another exemplary embodiment of this application. (See attached flowchart.) Figure 8 As shown, in an exemplary embodiment, the temperature control method can be implemented by the vehicle's ECU, including steps S210 to S220 and step S810.

[0107] In this embodiment of the application, step S810 will be described in detail below:

[0108] Step S810: If the temperature of the cooling mixture is less than the second desired temperature value, adjust the opening of the intercooler throttle valve to reduce the flow rate of the intercooler coolant; wherein, the intercooler throttle valve is connected to the intercooler to control the flow rate of the coolant flowing to the intercooler.

[0109] The temperature of the cooling mixture is the actual temperature of the cooling mixture, which can be expressed as T. cac_act If T cac_act <T cac_set In other words, if the current temperature of the air-fuel mixture is too low, condensation may occur. Therefore, it is necessary to adjust the opening of the intercooler throttle valve to reduce the flow rate of the intercooler coolant, thereby reducing the heat exchange between the intercooler coolant and the outside environment, reducing the intercooler's cooling effect on the air-fuel mixture, and increasing the temperature of the air-fuel mixture. This intercooler throttle valve is connected to the intercooler. The smaller the opening value of the intercooler throttle valve, the greater the flow rate of coolant to the intercooler, and the better the cooling effect of the intercooler; conversely, the larger the opening value, the worse the cooling effect of the intercooler.

[0110] Alternatively, the intercooler throttle valve can be selected as a model with a smaller opening value and a smaller flow rate. Accordingly, in this case, if it is necessary to reduce the cooling effect of the intercooler on the air-fuel mixture, the opening value of the intercooler throttle valve can be reduced.

[0111] It should be noted that steps S210 to S220 have already been described in detail below. Figure 2 The embodiments shown are described in detail, and will not be repeated here.

[0112] This method controls the flow rate of coolant to the intercooler by controlling the intercooler's throttle valve, thereby controlling the intercooler's cooling effect on the air-fuel mixture and facilitating temperature control.

[0113] Please see Figure 9 , Figure 9 A flowchart illustrating a temperature control method as another exemplary embodiment of this application. (See attached flowchart.) Figure 9 As shown, in an exemplary embodiment, the temperature control method can be implemented by the vehicle's ECU, including steps S210 to S220 and steps S910 to S930.

[0114] Steps S910 to S930 will be described in detail below:

[0115] Step S910: Obtain the current opening value of the intercooler throttle valve and the second preset adjustment step of the intercooler throttle valve.

[0116] The second preset adjustment step size can be designed by those skilled in the art, for example, 1%.

[0117] Step S920: Summing the current opening value of the intercooler throttle valve with the second preset adjustment step size to obtain the second target opening value; wherein, when the intercooler throttle valve is at the second target opening value, the temperature of the cooling mixture is greater than or equal to the second desired temperature value.

[0118] Specifically, the intercooler throttle valve can first add a second preset adjustment step to the current opening value. At this point, the intercooler coolant flow rate will decrease, and the intercooler will then cool the air-fuel mixture. The ECU can then measure the temperature of the cooled air-fuel mixture after the intercooler throttle valve opening value has changed. If the temperature of the cooled air-fuel mixture is still lower than the second desired temperature value, the intercooler throttle valve needs to continue adding the second preset adjustment step to the opening value until the temperature of the cooled air-fuel mixture is greater than or equal to the second desired temperature value. When the temperature of the cooled air-fuel mixture is greater than or equal to the second desired temperature value, the opening value of the intercooler throttle valve is the second target opening value.

[0119] like Figure 10 The diagram shown is a simplified water flow loop water temperature control diagram of an intercooler provided in an embodiment of this application. Figure 10 In this circuit, the intercooler includes a throttle valve, an intercooler, and an intercooler radiator. After the air-fuel mixture enters the intercooler, it is cooled, lowering its temperature and becoming a cooled mixture. The temperature of the intercooler coolant also rises accordingly. After being cooled by the intercooler radiator, a cooler liquid is obtained, which returns to the intercooler through the throttle valve to continue cooling the air-fuel mixture. When the temperature of the cooled air-fuel mixture falls below a second desired temperature, the opening of the intercooler throttle valve can be increased, reducing the flow rate of the intercooler coolant. Although the cooling efficiency of the intercooler radiator remains unchanged, the reduced flow rate diminishes the cooling effect of the intercooler, causing the air-fuel mixture temperature to rise. Furthermore, the ECU can send a boost temperature pressure signal to the intercooler, which promotes the entry of the cooled air-fuel mixture into the cylinder.

[0120] Step S930: Adjust the current opening value of the intercooler throttle valve to the second target opening value.

[0121] It should be noted that steps S210 to S220 have already been described in detail below. Figure 2 The embodiments shown are described in detail, and will not be repeated here.

[0122] This method controls the flow rate of intercooler coolant by adjusting the opening of the intercooler throttle valve. The control method is easy to operate and relatively stable, which can improve the accuracy of temperature control of the air-fuel mixture.

[0123] Please see Figure 11 , Figure 11 A flowchart illustrating a temperature control method as another exemplary embodiment of this application. (See attached flowchart.) Figure 11 As shown, in an exemplary embodiment, the temperature control method can be implemented by the vehicle's ECU, including steps S1101 to S1110.

[0124] The following is a detailed description of steps S1101 to S1110:

[0125] Step S1101: Determine whether the temperature or humidity of the exhaust gas is too high.

[0126] If yes, proceed to step S1102; otherwise, proceed to step S1104.

[0127] Step S1102: Determine if the engine is cold-started.

[0128] That is, determine whether the engine coolant temperature is within the preset safe coolant temperature threshold. If yes, it is a cold start and step S1104 is executed; otherwise, step S1103 is executed.

[0129] Step S1103: Determine whether the engine speed and torque are within the safe range.

[0130] That is, it determines whether the engine speed is within the preset safe speed range and whether the engine torque is within the preset safe torque range. If yes, proceed to step S1105; otherwise, proceed to step S1104.

[0131] Step S1104: Disable EGR function and exit protection mode.

[0132] Step S1105: Calculate the first desired temperature value and the second desired temperature value.

[0133] Step S1106: Determine whether the temperature of the cooling exhaust gas has reached the first desired temperature value and whether the temperature of the cooling mixed gas has reached the second desired temperature value.

[0134] If yes, proceed to step S1107; otherwise, proceed to step S1108.

[0135] Step S1107: Maintain the current opening values ​​of the electric water pump and intercooler throttle valve.

[0136] Step S1108: Control at least one of the opening values ​​of the electric water pump and the intercooler throttle valve.

[0137] That is, when the temperature of the cooling exhaust gas is lower than the first desired temperature value, the opening value of the electronic water pump is controlled; when the temperature of the cooling mixture is lower than the second desired temperature value, the opening value of the intercooler throttle valve is controlled.

[0138] Step S1109: Determine whether the opening degree of the electric water pump is greater than 0% and whether the opening degree of the intercooler throttle valve is less than 100%.

[0139] If yes, it means that the temperature of the cooling exhaust gas and cooling mixture can still be controlled by the electronic water pump and the intercooler throttle valve, and then step S1106 can be executed. If no, it means that the electronic water pump and the intercooler are currently in the off state, and the temperature of the cooling exhaust gas and cooling mixture can no longer be controlled by the electronic water pump and the intercooler throttle valve. Therefore, it is necessary to reduce the intake of exhaust gas, and step S1110 should be executed.

[0140] Step S1110: Reduce the opening value of the EGR valve.

[0141] Specifically, the opening value of the EGR valve can be subtracted from a third preset adjustment step. This third preset adjustment step can be set by those skilled in the art, for example, 1%. Further, step S1106 can be executed.

[0142] It should be noted that the specific implementation process of steps S1101 to S1110 has been described in detail in the foregoing embodiments, and will not be repeated here.

[0143] This method allows for temperature control of both the cooling exhaust gas and the cooling mixture not only through the electric water pump and intercooler throttle valve, but also by reducing the exhaust gas intake. In extreme weather conditions, such as very low ambient temperatures, even if the electric water pump and intercooler throttle valve are completely shut off—meaning active cooling of the EGR cooler and intercooler is completely stopped—the temperature of the cooling exhaust gas and cooling mixture may still not reach the desired value. In such cases, the exhaust gas intake can be reduced. This ensures that the EGR function remains operational even in extreme weather conditions, allowing it to handle various scenarios and increasing its operational flexibility.

[0144] Figure 12 This is a schematic diagram of a temperature control device according to an exemplary embodiment. Figure 12 As shown, in one exemplary embodiment, the temperature control device includes:

[0145] The acquisition unit 1210 is used to acquire the EGR parameters corresponding to the vehicle engine, wherein the EGR parameters are used to characterize the current intake state.

[0146] The calculation unit 1220 is used to calculate, based on the EGR parameters, a first desired temperature value of the cooled exhaust gas obtained after the vehicle's exhaust gas passes through the EGR cooler, and a second desired temperature value of the cooled air-fuel mixture obtained after the vehicle's air-fuel mixture passes through the intercooler; wherein the air-fuel mixture is obtained by mixing the cooled exhaust gas with the engine's intake air.

[0147] Control unit 1230 is configured to adjust the flow rate of the EGR cooler coolant based on the temperature of the cooling exhaust gas and the first desired temperature value to control the temperature of the cooling exhaust gas, and to adjust the flow rate of the intercooler coolant based on the temperature of the cooling mixture and the second desired temperature value to control the temperature of the cooling mixture.

[0148] In one embodiment of this application, based on the aforementioned scheme, the acquisition unit 1210 is further used to acquire the engine speed, torque and engine coolant temperature; if the engine speed is within a preset safe speed range, the torque is within a preset safe torque range, and the coolant temperature is greater than or equal to a preset safe coolant temperature threshold, then the EGR parameters corresponding to the vehicle engine are acquired.

[0149] In one embodiment of this application, based on the aforementioned scheme, the acquisition unit 1210 is further configured to acquire the EGR circulation rate and EGR pressure, which are calculated based on EGR parameters; the calculation unit 1220 is further configured to calculate the first desired temperature value of the cooled exhaust gas obtained after the vehicle's exhaust gas passes through the EGR cooler, based on the EGR circulation rate and EGR pressure.

[0150] In one embodiment of this application, based on the aforementioned scheme, the acquisition unit 1210 is further configured to acquire the current intake air flow rate, the current intake air temperature and humidity, and the current EGR cycle rate of the engine; the calculation unit 1220 is further configured to calculate the second desired temperature value of the cooled air mixture obtained after the air-fuel mixture passes through the intercooler, based on the current intake air flow rate, the current intake air temperature and humidity, and the current EGR cycle rate.

[0151] In one embodiment of this application, based on the aforementioned scheme, the control unit 1230 is further configured to adjust the opening of the electronic water pump to reduce the flow rate of the EGR cooler if the temperature of the cooling exhaust gas is less than the first desired temperature value; wherein the electronic water pump is connected to the EGR cooler to control the flow rate of the coolant flowing to the EGR cooler.

[0152] In one embodiment of this application, based on the aforementioned scheme, the acquisition unit 1210 is further configured to acquire the current opening value of the electronic water pump and the first preset adjustment step size of the electronic water pump; the calculation unit 1220 is further configured to perform a difference operation between the current opening value of the electronic water pump and the first preset adjustment step size to obtain a first target opening value; wherein, when the electronic water pump is at the first target opening value, the temperature of the cooling exhaust gas is greater than or equal to the first desired temperature value; and the current opening value of the electronic water pump is adjusted to the first target opening value.

[0153] In one embodiment of this application, based on the aforementioned scheme, the control unit 1230 is further configured to adjust the opening of the intercooler throttle valve to reduce the flow rate of the intercooler coolant if the temperature of the cooling mixture is less than the second desired temperature value; wherein, the intercooler throttle valve is connected to the intercooler to control the flow rate of the coolant flowing to the intercooler.

[0154] In one embodiment of this application, based on the aforementioned scheme, the acquisition unit 1210 is further configured to acquire the current opening value of the intercooler throttle valve and the second preset adjustment step size of the intercooler throttle valve; the calculation unit 1220 is further configured to sum the current opening value of the intercooler throttle valve and the second preset adjustment step size to obtain a second target opening value; wherein, when the intercooler throttle valve is at the second target opening value, the temperature of the cooling mixture is greater than or equal to the second desired temperature value; the control unit 1230 is further configured to adjust the current opening value of the intercooler throttle valve to the second target opening value.

[0155] It should be noted that the temperature control device provided in the above embodiments and the temperature control method provided in the above embodiments belong to the same concept. The specific way in which each module and unit performs operations has been described in detail in the method embodiments, and will not be repeated here.

[0156] Embodiments of this application also provide an electronic device, including: one or more processors; and a storage device for storing one or more programs, which, when executed by one or more processors, cause the electronic device to implement the temperature control methods provided in the above embodiments.

[0157] Figure 13 A schematic diagram of the structure of a computer system suitable for implementing the electronic device of the present application is shown.

[0158] It should be noted that, Figure 13 The computer system 1300 of the electronic device shown is merely an example and should not impose any limitation on the functionality and scope of use of the embodiments of this application.

[0159] like Figure 13As shown, the computer system 1300 includes a Central Processing Unit (CPU) 1301, which can perform various appropriate actions and processes, such as executing the methods described in the above embodiments, based on programs stored in Read-Only Memory (ROM) 1302 or programs loaded from storage portion 1308 into Random Access Memory (RAM) 1303. The RAM 1303 also stores various programs and data required for system operation. The CPU 1301, ROM 1302, and RAM 1303 are interconnected via a bus 1304. An Input / Output (I / O) interface 1305 is also connected to the bus 1304.

[0160] The following components are connected to I / O interface 1305: an input section 1306 including a keyboard, mouse, etc.; an output section 1307 including a cathode ray tube (CRT), liquid crystal display (LCD), etc., and speakers, etc.; a storage section 1308 including a hard disk, etc.; and a communication section 1309 including a network interface card such as a LAN (Local Area Network) card, modem, etc. The communication section 1309 performs communication processing via a network such as the Internet. A drive 1310 is also connected to I / O interface 1305 as needed. Removable media 1311, such as a disk, optical disk, magneto-optical disk, semiconductor memory, etc., are installed on drive 1310 as needed so that computer programs read from them can be installed into storage section 1308 as needed.

[0161] Specifically, according to embodiments of this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments of this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program including a computer program for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via communication section 1309, and / or installed from removable medium 1311. When the computer program is executed by central processing unit (CPU) 1301, it performs various functions defined in the system of this application.

[0162] It should be noted that the computer-readable medium shown in the embodiments of this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. For example, a computer-readable medium can be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM), flash memory, optical fiber, portable compact disc read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying a computer-readable computer program. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media can also be any computer-readable medium other than computer-readable storage media, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to wireless, wired, etc., or any suitable combination thereof.

[0163] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. Each block in a flowchart or block diagram may represent a module, segment, or portion of code, which contains one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram or flowchart, and combinations of blocks in a block diagram or flowchart, may be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0164] The units described in the embodiments of this application can be implemented in software or hardware, and the described units can also be located in a processor. The names of these units do not necessarily limit the specific unit itself.

[0165] Another aspect of this application provides a computer-readable medium having a computer program stored thereon, which, when executed by a processor, implements the cross-domain data transfer method as described above. This computer-readable medium may be included in the electronic device described in the above embodiments, or it may exist independently and not assembled into the electronic device.

[0166] Another aspect of this application provides a computer program product or computer program including computer instructions stored in a computer-readable medium. A processor of a computer device reads the computer instructions from the computer-readable medium and executes the computer instructions, causing the computer device to perform the cross-domain data transfer method provided in the various embodiments described above.

[0167] The above description is merely a preferred exemplary embodiment of this application and is not intended to limit the implementation of this application. Those skilled in the art can easily make corresponding modifications or alterations based on the main concept and spirit of this application. Therefore, the scope of protection of this application should be determined by the scope of protection claimed in the claims.

Claims

1. A temperature control method characterized by, The method comprises the following steps: obtaining EGR parameters corresponding to the engine of the vehicle, the EGR parameters being used to represent the current intake state, and the EGR parameters comprising an opening value of an EGR valve, an opening value of an EGR throttle valve, temperatures and pressures of gases before and after an EGR cooler, an intake temperature and a relative humidity, temperatures and pressures of gases before and after an intercooler, a current flow of intake air of the engine, a current temperature and humidity of the intake air, and calculating a first expected temperature value of cooled exhaust gas of the vehicle after the exhaust gas of the vehicle passes through the EGR cooler based on the EGR parameters, and calculating a second expected temperature value of cooled mixed gas of the vehicle after the mixed gas of the vehicle passes through the intercooler based on the EGR parameters; wherein the mixed gas is obtained by mixing the cooled exhaust gas with intake air of the engine; adjusting a flow of cooling liquid of the EGR cooler based on a temperature of the cooled exhaust gas and the first expected temperature value to control the temperature of the cooled exhaust gas, and adjusting a flow of cooling liquid of the intercooler based on a temperature of the cooled mixed gas and the second expected temperature value to control the temperature of the cooled mixed gas; wherein the temperature of the cooled exhaust gas refers to an actual temperature of the exhaust gas of the vehicle after the exhaust gas of the vehicle passes through the EGR cooler for cooling treatment; the step of calculating the first expected temperature value of the cooled exhaust gas of the vehicle after the exhaust gas of the vehicle passes through the EGR cooler based on the EGR parameters comprises the following steps: filtering the opening value of the EGR valve, the opening value of the EGR throttle valve, the temperatures and pressures of the gases before and after the EGR cooler, the intake temperature and the relative humidity, and the temperatures and pressures of the gases before and after the intercooler to calculate an EGR circulation rate and an EGR pressure; calculating the first expected temperature value of the cooled exhaust gas of the vehicle after the exhaust gas of the vehicle passes through the EGR cooler according to the EGR circulation rate and the EGR pressure. the step of obtaining the EGR parameters corresponding to the engine of the vehicle comprises the following steps:

2. The method of claim 1, wherein, obtaining a speed, a torque of the engine, and a temperature of cooling liquid of the engine; if the speed is within a preset safe speed range, the torque is within a preset safe torque range, and the temperature of the cooling liquid is greater than or equal to a preset safe liquid temperature threshold, obtaining the EGR parameters corresponding to the engine of the vehicle. the step of calculating the second expected temperature value of the cooled mixed gas of the vehicle after the mixed gas of the vehicle passes through the intercooler based on the EGR parameters comprises the following steps:

3. The method of claim 1, wherein, obtaining a current flow of the intake air of the engine, a current temperature and humidity of the intake air, and a current EGR circulation rate of the engine; calculating the second expected temperature value of the mixed gas of the vehicle after the mixed gas of the vehicle passes through the intercooler based on the current flow of the intake air, the current temperature and humidity of the intake air, and the current EGR circulation rate. the step of adjusting the flow of the cooling liquid of the EGR cooler based on the temperature of the cooled exhaust gas and the first expected temperature value comprises the following steps:

4. The method of claim 1, wherein, ​ If the temperature of the cooled exhaust gas is less than the first expected temperature value, the opening of an electronic water pump is adjusted to reduce the flow of the EGR cooler coolant, wherein the electronic water pump is connected to the EGR cooler to control the flow of the coolant to the EGR cooler.

5. The method of claim 4, wherein, The adjustment of the opening of the electronic water pump comprises: obtaining a current opening value of the electronic water pump and a first preset adjustment step of the electronic water pump; performing a difference operation on the current opening value of the electronic water pump and the first preset adjustment step to obtain a first target opening value, wherein the temperature of the cooled exhaust gas is greater than or equal to the first expected temperature value when the electronic water pump is at the first target opening value; adjusting the current opening value of the electronic water pump to the first target opening value.

6. The method of claim 1, wherein, The adjustment of the flow of the intercooler coolant based on the temperature of the cooled mixed gas and the second expected temperature value comprises: If the temperature of the cooled mixed gas is less than the second expected temperature value, the opening of an intercooler throttle valve is adjusted to reduce the flow of the intercooler coolant, wherein the intercooler throttle valve is connected to the intercooler to control the flow of the coolant to the intercooler.

7. The method of claim 6, wherein, The adjustment of the opening of the intercooler throttle valve comprises: obtaining a current opening value of the intercooler throttle valve and a second preset adjustment step of the intercooler throttle valve; performing a sum operation on the current opening value of the intercooler throttle valve and the second preset adjustment step to obtain a second target opening value, wherein the temperature of the cooled mixed gas is greater than or equal to the second expected temperature value when the intercooler throttle valve is at the second target opening value; adjusting the current opening value of the intercooler throttle valve to the second target opening value.

8. A temperature control device, characterized by, comprises: an obtaining unit, configured to obtain an EGR parameter corresponding to a vehicle engine, the EGR parameter being used to represent a current intake state, and the EGR parameter comprising an opening value of an EGR valve, an opening value of an EGR throttle valve, temperatures and pressures of gases before and after an EGR cooler, an intake temperature and a relative humidity, temperatures and pressures of gases before and after an intercooler, a current flow of intake air of the engine, a current temperature and humidity of the intake air; a calculating unit, configured to calculate a first expected temperature value of cooled exhaust gas of the vehicle after the exhaust gas passes through the EGR cooler based on the EGR parameter, and calculate a second expected temperature value of cooled mixed gas of the vehicle after the mixed gas passes through the intercooler based on the EGR parameter, wherein the mixed gas is obtained by mixing the cooled exhaust gas and intake air of the engine; a control unit, configured to adjust a flow of the EGR cooler coolant based on a temperature of the cooled exhaust gas and the first expected temperature value to control the temperature of the cooled exhaust gas, and adjust a flow of the intercooler coolant based on a temperature of the mixed gas and the second expected temperature value to control the temperature of the mixed gas, wherein the temperature of the cooled exhaust gas refers to an actual temperature of the exhaust gas of the vehicle after the exhaust gas is cooled by the EGR cooler. The first expected temperature value of the cooled exhaust gas of the vehicle after the exhaust gas passes through the EGR cooler is calculated based on the EGR parameter, comprising: The opening value of the EGR valve, the opening value of the EGR throttle, the temperature and pressure of the gas before and after the EGR cooler, the temperature and relative humidity of the intake air, the temperature and pressure of the gas before and after the intercooler are filtered to calculate the EGR circulation rate and the EGR pressure. According to the EGR circulation rate and the EGR pressure, the first expected temperature value of the cooled exhaust gas of the vehicle after the exhaust gas passes through the EGR cooler is calculated.

9. An electronic device, comprising: Comprise: One or more processors; Memory for storing one or more programs, when the one or more programs are executed by the electronic device, the electronic device implements the temperature control method as claimed in any one of claims 1 to 7.

10. A computer readable medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the temperature control method as claimed in any one of claims 1 to 7. The computer program is executed by the processor to implement the temperature control method as claimed in any one of claims 1 to 7.

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