Engine temperature regulation method and apparatus, and vehicle, device and storage medium

Abstract

An engine temperature regulation method and apparatus, and a vehicle, a device and a storage medium. The regulation method comprises: acquiring vehicle operating parameters of a vehicle (S101); determining an operating mode of a cooling system that matches the vehicle operating parameters (S102); and on the basis of a regulation strategy corresponding to the operating mode, regulating the state of one or more temperature control devices in the cooling system, in order to regulate the temperature of an engine (S103). Thus, the temperature of an engine can be effectively maintained in an appropriate operating temperature range.

Description

Methods, devices, vehicles, equipment, and storage media for adjusting engine temperature.

[0001] Cross-reference to related applications

[0002] This application claims priority and benefits to patent application No. 202411478904.5, filed with the China National Intellectual Property Administration on October 22, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of engine technology, and more particularly to the field of engine temperature control technology, specifically to a method, device, vehicle, equipment, and storage medium for adjusting engine temperature. Background Technology

[0004] As the core component that efficiently converts the chemical energy of gasoline into mechanical energy, the engine releases a huge amount of heat energy during fuel combustion. To ensure engine performance, a cooling system is often needed to maintain the engine temperature within a suitable operating range.

[0005] In the related technology CN110805437A, the target speed of the electric fan and the basic pump speed can be output to achieve pre-control, which improves the system responsiveness. The basic pump speed is corrected by PID and ambient temperature to improve control accuracy and control the speed of the electric water pump. However, it does not give full play to the advantages of the electric water pump and cannot accurately maintain the engine temperature within the appropriate operating temperature range.

[0006] Among the related technologies, CN117685089A can analyze the target coolant temperature and real-time coolant temperature difference of the engine, and calculate the target speed under different speeds and torques based on the external temperature and PID feedback. However, it does not consider different operating conditions, and therefore cannot accurately maintain the engine temperature within the appropriate operating temperature range.

[0007] Therefore, it is necessary to explore effective ways to maintain the engine temperature within a suitable operating temperature range. Summary of the Invention

[0008] This application provides a method, apparatus, vehicle, device, and storage medium for adjusting engine temperature, to at least solve the technical problem in related technologies of difficulty in maintaining engine temperature within a suitable operating temperature range. The technical solution of this application is as follows:

[0009] According to a first aspect of this application, a method for adjusting engine temperature is provided, comprising: acquiring vehicle operating parameters; determining a cooling system operating mode matching the vehicle operating parameters; and adjusting the state of one or more temperature control devices in the cooling system based on an adjustment strategy corresponding to the operating mode, thereby adjusting the engine temperature. Based on the above technical means, this application can ensure that the engine remains within a suitable temperature range under various operating conditions by real-time monitoring of vehicle operating parameters and adjusting the cooling system operating mode, avoiding performance degradation or damage due to overheating. Furthermore, it provides more flexible and faster control over multiple operating modes of the cooling system, and more precise control over engine coolant temperature with smaller temperature fluctuations. Therefore, this application can effectively maintain the engine temperature within a suitable operating temperature range.

[0010] In one possible approach, the operating modes of the cooling system include at least one of the following: cold start mode, hot start normal operation mode, heating mode, exhaust gas recirculation (EGR) cooling mode, detonation cooling mode, shutdown operation mode, and waste heat recovery mode.

[0011] Based on the aforementioned technical means, this application enables the cooling system to flexibly adjust its working state according to the specific needs under different operating conditions, thereby effectively protecting the engine from damage caused by overheating or overcooling, improving fuel economy and emission performance, and ensuring the comfort of the in-vehicle environment.

[0012] In one possible approach, vehicle operating parameters include the engine's average retardation angle. Determining the operating mode of the cooling system that matches the vehicle operating parameters includes: when the engine is in operation and the engine's average retardation angle is less than a first threshold, determining the operating mode of the cooling system as a first operating mode based on the vehicle operating parameters; the first operating mode includes: cold start mode, hot engine normal operation mode, heating mode, and EGR cooling mode; when the engine is in operation and the engine's average retardation angle is greater than or equal to the first threshold, determining the operating mode of the cooling system as a knock cooling mode.

[0013] In one possible approach, vehicle operating parameters include: engine cylinder head outlet water temperature, engine target temperature, heating demand flow rate, and EGR outlet temperature. Based on these parameters, determining the cooling system's operating mode as a first operating mode includes: when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than a second threshold, determining the cooling system's operating mode as a cold start mode; when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than the second threshold, the engine cylinder head outlet water temperature is less than a third threshold, the heating demand flow rate is zero, and the EGR outlet temperature is less than a fourth threshold, determining the cooling system's operating mode as a hot engine normal operation mode. When the engine cylinder head outlet water temperature is greater than or equal to the third threshold, and the heating demand flow rate is not zero, determining the cooling system's operating mode as a heating mode; when the engine cylinder head outlet water temperature is less than the third threshold and / or the heating demand flow rate is zero, and the EGR outlet temperature is greater than or equal to the fourth threshold, determining the cooling system's operating mode as an EGR cooling mode.

[0014] One possible approach is to determine the operating mode of the cooling system that matches the vehicle's operating parameters, including: when the engine is in a stopped state, determining the operating mode of the cooling system that matches the engine cylinder head outlet water temperature.

[0015] In one possible approach, determining the operating mode of the cooling system that matches the engine cylinder head outlet water temperature includes: determining the operating mode of the cooling system as a shutdown operation mode when the engine cylinder head outlet water temperature is greater than or equal to a fifth threshold; and determining the operating mode of the cooling system as a waste heat recovery and utilization mode when the engine cylinder head outlet water temperature is greater than or equal to a third threshold and the heating demand flow is not zero.

[0016] One possible approach is to exit the shutdown operation mode when the engine cylinder head coolant temperature is below the sixth threshold.

[0017] In one possible approach, the temperature control devices of the cooling system include an electronic water pump, an electronic thermostat, and an electronic fan; based on the adjustment strategy corresponding to the operating mode, the state of one or more temperature control devices in the cooling system is adjusted, including: determining the target speed, target duty cycle, and target gear based on the adjustment strategy corresponding to the operating mode and vehicle operating parameters; adjusting the speed of the electronic water pump to the target speed, adjusting the duty cycle of the electronic thermostat to the target duty cycle, and adjusting the gear of the electronic fan to the target gear.

[0018] In one possible approach, when the operating mode is the normal hot-engine operation mode, the target speed, target duty cycle, and target gear are determined based on the adjustment strategy corresponding to the operating mode and the vehicle operating parameters. This includes: if the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is less than a first calibration value, the target speed is determined to be less than the current speed, the target duty cycle is zero, and the target gear is the off gear; if the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than or equal to the first calibration value and less than the second calibration value, the target speed is determined to be the current speed, the target duty cycle is PID controlled, and the target gear is the off gear; if the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than or equal to the second calibration value and less than the third calibration value, the target speed is determined to be greater than the current speed, the target duty cycle is PID controlled, and the target gear is the off gear; if the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than the third calibration value, the target speed is determined to be greater than the current speed, the target duty cycle is the maximum value, and the target gear is the on gear.

[0019] In one possible approach, vehicle operating parameters include vehicle speed; when the operating mode is a shutdown-after-operation mode, the method includes: determining the operating time of the electric water pump based on the engine cylinder head outlet water temperature; and determining the operating time of the electric fan based on the vehicle speed and the engine cylinder head outlet water temperature.

[0020] According to a second aspect provided in this application, an engine temperature adjustment device is provided, the device comprising: an acquisition unit, a determination unit, and an adjustment unit; the acquisition unit is used to acquire vehicle operating parameters; the determination unit is used to determine the operating mode of the cooling system that matches the vehicle operating parameters; and the adjustment unit is used to adjust the engine temperature through the cooling system based on the adjustment strategy corresponding to the operating mode.

[0021] In one possible approach, the determining unit is specifically used to: determine a first operating mode based on vehicle operating parameters when the engine is in a running state and the engine's average retardation angle is less than a first threshold; the first operating mode includes: cold start mode, hot engine normal operation mode, heating mode, and EGR cooling mode;

[0022] In one possible approach, the determining unit is specifically used to: determine a first operating mode based on vehicle operating parameters when the engine is in a running state and the engine's average retardation angle is less than a first threshold; the first operating mode includes: cold start mode, hot engine normal operation mode, heating mode, and EGR cooling mode; and when the engine is in a running state and the engine's average retardation angle is greater than or equal to the first threshold, determine the knock cooling mode as the operating mode of the cooling system.

[0023] In one possible approach, the determining unit is specifically configured to: determine the cold start mode as the operating mode of the cooling system when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than a second threshold; and determine the hot engine normal operation mode as the operating mode of the cooling system when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than the second threshold, the engine cylinder head outlet water temperature is less than a third threshold, the heating demand flow is zero, and the EGR outlet air temperature is less than a fourth threshold. When the engine cylinder head outlet water temperature is greater than or equal to the third threshold and the heating demand flow is not zero, the heating mode is determined as the operating mode of the cooling system; and when the engine cylinder head outlet water temperature is less than the third threshold and / or the heating demand flow is zero, and the EGR outlet air temperature is greater than or equal to the fourth threshold, the EGR cooling mode is determined as the operating mode of the cooling system.

[0024] In one possible approach, the determining unit is specifically used to: determine the operating mode of the cooling system that matches the engine cylinder head outlet water temperature when the engine is in a stopped state.

[0025] In one possible approach, the determining unit is specifically used to: determine the shutdown operation mode as the working mode of the cooling system when the engine cylinder head outlet water temperature is greater than or equal to the fifth threshold; and determine the waste heat recovery and utilization mode as the working mode of the cooling system when the engine cylinder head outlet water temperature is greater than or equal to the third threshold and the heating demand flow is not zero.

[0026] In one possible approach, the determining unit is also used to exit the post-shutdown operating mode when the engine cylinder head outlet water temperature is less than a sixth threshold.

[0027] In one possible approach, the adjustment unit is specifically used to: determine the target speed, target duty cycle, and target gear based on the adjustment strategy corresponding to the working mode and the vehicle operating parameters;

[0028] Adjust the speed of the electric water pump to the target speed, adjust the duty cycle of the electronic thermostat to the target duty cycle, and adjust the speed of the electric fan to the target speed.

[0029] In one possible approach, the adjustment unit is specifically configured to: determine that the target speed is lower than the current speed, the target duty cycle is zero, and the target gear is off when the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is less than a first calibration value; determine that the target speed is the current speed, the target duty cycle is PID-controlled, and the target gear is off when the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than or equal to the first calibration value and less than a second calibration value; determine that the target speed is greater than the current speed, the target duty cycle is PID-controlled, and the target gear is off when the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than or equal to the second calibration value and less than a third calibration value; and determine that the target speed is greater than the current speed, the target duty cycle is at its maximum value, and the target gear is on when the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than the third calibration value.

[0030] In one possible approach, the adjustment unit is specifically configured to: determine the operating time of the electric water pump based on the engine cylinder head coolant temperature; and determine the operating time of the electric fan based on the vehicle speed and the engine cylinder head coolant temperature. According to a third aspect provided in this application, an electronic device is provided, comprising: a processor; and a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement the methods of the first aspect described above and any possible implementation thereof.

[0031] According to a fourth aspect provided in this application, a computer-readable storage medium is provided that, when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, enables the electronic device to perform the methods described in the first aspect and any possible implementation thereof.

[0032] According to the fifth aspect provided in this application, a computer program product is provided, the computer program product including computer instructions, which, when executed on an electronic device, cause the electronic device to perform the method described in the first aspect and any possible implementation thereof.

[0033] Therefore, the above-mentioned technical features of this application have the following beneficial effects:

[0034] (1) By monitoring vehicle operating parameters in real time and adjusting the working mode of the cooling system, it is possible to ensure that the engine can be maintained within a suitable temperature range under various operating conditions, avoiding performance degradation or damage caused by overheating. Furthermore, the multiple working modes of the cooling system offer more flexible control, faster response, and more precise control of engine coolant temperature with less temperature fluctuation. Therefore, this application can effectively maintain the engine temperature within a suitable operating temperature range.

[0035] (2) It enables the cooling system to flexibly adjust its working state according to the specific needs under different working conditions, thereby effectively protecting the engine from overheating or overcooling, improving fuel economy and emission performance, and ensuring the comfort of the in-vehicle environment.

[0036] It should be noted that the technical effects of any of the implementation methods in aspects two through five can be found in the technical effects of the corresponding implementation methods in aspect one, and will not be repeated here.

[0037] 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

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0039] Figure 1 is a flowchart illustrating an engine temperature adjustment method according to an exemplary embodiment;

[0040] Figure 2 is a schematic diagram illustrating a temperature adjustment process according to an exemplary embodiment;

[0041] Figure 3 is a schematic diagram illustrating the classification of operating modes of a cooling system according to an exemplary embodiment;

[0042] Figure 4 is a schematic diagram illustrating an electronic water pump speed determination process according to an exemplary embodiment;

[0043] Figure 5 is a schematic diagram illustrating another process for determining the rotational speed of an electronic water pump according to an exemplary embodiment;

[0044] Figure 6 is a schematic diagram illustrating a heat engine normal operation mode adjustment strategy according to an exemplary embodiment;

[0045] Figure 7 is a block diagram illustrating an engine temperature adjustment device according to an exemplary embodiment;

[0046] Figure 8 is a block diagram illustrating an electronic device according to an exemplary embodiment. Detailed Implementation

[0047] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0048] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. 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.

[0049] As described in the background art, in order to effectively maintain the engine temperature within a suitable operating temperature range, this application provides an engine temperature adjustment method. This method can acquire vehicle operating parameters and determine the operating mode of the cooling system that matches the vehicle operating parameters, so as to further adjust the engine temperature through the cooling system based on the adjustment strategy corresponding to the operating mode.

[0050] For ease of understanding, the method for adjusting engine temperature provided in this application will be described in detail below with reference to the accompanying drawings.

[0051] Figure 1 is a flowchart illustrating an engine temperature adjustment method according to an exemplary embodiment. As shown in Figure 1, the engine temperature adjustment method includes the following steps: S101-S103.

[0052] S101, Engine temperature adjustment device acquires vehicle operating parameters.

[0053] The vehicle operating parameters include engine status, engine cylinder head coolant temperature, engine target temperature, EGR outlet temperature, heating demand flow rate, exhaust gas recirculation (EGR) gas flow rate, mean ignition angle signal, vehicle speed, and ambient temperature.

[0054] As can be understood, engine cylinder head outlet temperature refers to the temperature of the coolant flowing out of the cylinder head outlet after passing through the cooling system. Engine target temperature refers to the optimal operating temperature range recommended by the engine design or manufacturer. This temperature range is typically determined based on a comprehensive consideration of factors such as engine performance, fuel economy, emissions, and durability. Heating demand flow rate refers to the flow rate of coolant that the cooling system needs to supply to the heating system to meet the vehicle's interior heating needs. This flow rate depends on the vehicle's interior temperature setting, the external ambient temperature, and the passengers' heating requirements. EGR outlet temperature refers to the temperature of the exhaust gas that has been processed by the EGR system and is recirculated into the engine combustion chamber. Engine state refers to the engine's operating condition at a given moment. The engine's mean ignition angle (also known as ignition advance angle or ignition lag angle) refers to the crankshaft angle relative to the moment the spark plug ignites during engine operation, before the piston reaches top dead center.

[0055] In one possible approach, the vehicle can be equipped with temperature sensors and a vehicle speed sensor. The engine temperature adjustment device can measure the engine cylinder head coolant temperature in real time based on a temperature sensor located near the coolant outlet of the engine cylinder head or cooling system. The engine temperature adjustment device can also measure the EGR exhaust temperature in real time based on a temperature sensor located near the EGR valve. Alternatively, the engine temperature adjustment device can obtain the ambient temperature based on temperature sensors on the vehicle. Finally, the engine temperature adjustment device can obtain the vehicle's real-time speed based on a vehicle speed sensor deployed on the vehicle.

[0056] S102, The engine temperature adjustment device determines the operating mode of the cooling system that matches the vehicle's operating parameters.

[0057] It should be noted that the operating modes of the cooling system may include at least one of the following: cold start mode, hot start normal operation mode, heating mode, EGR cooling mode, detonation cooling mode, shutdown operation mode, and waste heat recovery mode.

[0058] In one possible approach, during a cold start of the engine or equipment, the cooling system employs a cold start mode to quickly heat the engine to its normal operating temperature. Once the engine or equipment reaches its normal operating temperature, the cooling system enters a stable operating mode, i.e., a warm-up normal operating mode. When heating the vehicle or equipment interior is required, the cooling system switches to heating mode. EGR cooling mode refers to the process of cooling a portion of the exhaust gases before reintroducing them into the combustion chamber to lower their temperature. In some high-performance engines, a knock cooling mode may be used to prevent detonation. In certain situations, to prevent the engine or equipment from overheating after shutdown, the cooling system may continue to operate for a period of time, i.e., a shutdown operation mode. Waste heat recovery and utilization mode involves recovering and utilizing the waste heat generated during engine or equipment operation.

[0059] In one possible approach, the engine temperature adjustment device can determine a first operating mode based on vehicle operating parameters when the engine is in operation and the engine's average retardation angle is less than a first threshold. The first operating mode may include: cold start mode, hot engine normal operation mode, heating mode, and EGR cooling mode.

[0060] Optionally, the first threshold can be set according to actual needs. For example, the first threshold can be 60 degrees or 90 degrees. This application does not impose specific limitations in this regard.

[0061] Specifically, the engine temperature adjustment device can determine the cold start mode as the working mode of the cooling system when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than a second threshold.

[0062] Optionally, the second threshold can be set according to actual needs. For example, the second threshold can be 30 or 40. This application does not impose specific restrictions on this.

[0063] The engine temperature adjustment device can determine the normal operating mode of the hot engine as the operating mode of the cooling system when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than a second threshold, the engine cylinder head outlet water temperature is less than a third threshold, the heating demand flow is zero and the EGR outlet air temperature is less than a fourth threshold.

[0064] Optionally, the third threshold can be set according to actual needs. For example, the third threshold can be 60 degrees or 70 degrees. This application does not impose specific limitations on this.

[0065] Optionally, the fourth threshold can be set according to actual needs. For example, the fourth threshold can be 80 degrees or 100 degrees. This application does not impose specific limitations on this.

[0066] The engine temperature adjustment device can determine the heating mode as the working mode of the cooling system when the engine cylinder head outlet water temperature is greater than or equal to the third threshold and the heating demand flow is not zero.

[0067] The engine temperature adjustment device can determine the EGR cooling mode as the working mode of the cooling system when the engine cylinder head outlet water temperature is less than the third threshold and / or the heating demand flow is zero and the EGR outlet air temperature is greater than or equal to the fourth threshold.

[0068] In one possible approach, when the engine is in operation and the engine's average retardation angle is greater than or equal to a first threshold, the knock cooling mode is determined as the operating mode of the cooling system.

[0069] In another possible approach, with the engine in a stopped state, the operating mode of the cooling system is determined to match the engine cylinder head outlet water temperature.

[0070] Specifically, the engine temperature adjustment device can determine the shutdown operation mode as the working mode of the cooling system when the engine cylinder head outlet water temperature is greater than or equal to the fifth threshold, and exit the shutdown operation mode when the engine cylinder head outlet water temperature is less than the sixth threshold.

[0071] Optionally, the fifth threshold can be set according to actual needs. For example, the fifth threshold can be 100 degrees or 120 degrees. This application does not impose specific limitations on this.

[0072] Optionally, the sixth threshold can be set according to actual needs. For example, the sixth threshold can be 90 degrees or 80 degrees. The sixth threshold is greater than the third threshold and less than the fifth threshold. This application does not impose specific restrictions in this regard.

[0073] The engine temperature adjustment device can determine the waste heat recovery and utilization mode as the working mode of the cooling system when the engine cylinder head outlet water temperature is greater than or equal to the third threshold and the heating demand flow is not zero.

[0074] S103, The engine temperature adjustment device adjusts the state of one or more temperature control devices in the cooling system based on the adjustment strategy corresponding to the working mode, so as to adjust the engine temperature.

[0075] It should be noted that the cooling system may include an electric water pump, an electric fan, and an electronic thermostat. Different operating modes correspond to different electric water pump speeds, different electric fan activation levels, and different electronic thermostat activation levels.

[0076] In one possible approach, when the cooling system operates in the knock-cold zone mode, the adjustment strategy may include: the engine temperature adjustment device can determine the electric water pump speed M1 based on the engine's mean retardation angle signal. The electric water pump speed M1 can be the maximum value of the electric water pump, forcing the engine to use its maximum capacity to cool the engine, reducing the engine's base temperature, and thus suppressing the engine's knock tendency.

[0077] In one possible approach, when the cooling system is operating in cold start mode, the adjustment strategy may include: the engine temperature adjustment device may determine the operating speed M2 of the electric water pump based on the engine cylinder head outlet water temperature and engine power.

[0078] Specifically, when the engine cylinder head coolant temperature is low, in order to accelerate the temperature rise of the engine block and engine oil, and at the same time avoid the risk of abnormal rise in engine oil level, the engine temperature adjustment device can set the electronic water pump speed M2 to 0, that is, stop working, thereby reducing the heat exchange between the coolant and the engine block.

[0079] As the engine cylinder head coolant temperature gradually increases, the electric water pump begins to operate. The engine temperature adjustment device sets the electric water pump speed M2 as the base speed. This ensures that the temperature sensor can accurately collect the engine cylinder head coolant temperature, providing reliable feedback to the engine control system and maintaining a reasonable temperature difference between the engine inlet and outlet coolant temperatures to ensure the engine's safe and efficient operation.

[0080] Furthermore, as engine power increases, in order to effectively suppress engine knocking tendency and prevent boiling in the integrated exhaust manifold (IEM) area, the engine temperature adjustment device needs to increase the electric water pump speed M2 in a stepwise manner according to the power increase, thereby ensuring stable engine operation under high load conditions.

[0081] Furthermore, in cold start mode, the electric water pump's operating strategy must prioritize protecting engine heat and preventing its loss due to non-essential functions such as vehicle heating. By temporarily disabling its linkage with vehicle heating and other functions, the electric water pump fully supports the engine's rapid warm-up process, enabling the engine to reach its ideal operating temperature in the shortest possible time, thereby improving overall operating efficiency and reliability.

[0082] In one possible approach, when the cooling system operates in normal hot-engine mode, the adjustment strategy may include: the engine temperature adjustment device can determine the base speed M3 of the electric water pump based on engine speed and engine load signals, and determine a first correction speed M4 based on the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature, and further determine a second correction speed M5 based on vehicle speed and ambient temperature. The engine temperature adjustment device can then determine the electric water pump speed M6 as the sum of the base speed M3, the first correction speed M4, and the second correction speed M5.

[0083] Specifically, the engine temperature adjustment device can gradually increase the electric water pump speed (M3) as the engine speed increases, and further increase the electric water pump speed (M3) as the engine load increases. The engine temperature adjustment device or operators can determine the target coolant temperature under different speeds and loads based on the engine's design requirements and operating conditions. The target coolant temperature is a key parameter ensuring normal engine operation and optimal performance. Once the target coolant temperature is reached, the engine temperature adjustment device can allow coolant circulation by controlling the activation of the electronic thermostat. Precise control of the electronic thermostat is crucial for achieving rapid and stable coolant temperature regulation. After the electronic thermostat is activated, the engine temperature adjustment device can observe and record the temperature difference between the engine's inlet and outlet coolant by adjusting the electric water pump speed. This step aims to find the optimal pump speed that maintains the predetermined inlet and outlet temperature difference under different speeds and loads. The engine temperature adjustment device can select the corresponding base electric water pump speed (M3) from test data based on the engine's designed inlet and outlet temperature difference specifications. This speed should provide sufficient cooling capacity under various operating conditions while avoiding unnecessary energy consumption and noise.

[0084] In cold start mode, the electric water pump speed M2 is typically lower than the base speed M3 in normal warm start mode. This is because during a cold start, the engine temperature is low, and the demand for coolant is relatively low. Therefore, reducing the water pump speed can decrease energy consumption and noise.

[0085] The engine temperature adjustment device allows setting a threshold range for temperature difference correction. When the temperature difference between the engine cylinder head outlet water temperature and the target engine temperature falls between the second and seventh thresholds, the device determines the first correction speed to be 0, meaning no adjustment is made to the electric water pump's base speed M3. This range is primarily used for the activation and confirmation of the electronic thermostat. If the electronic thermostat is not activated, the engine coolant temperature cannot be effectively reduced; increasing the electric water pump speed in this case would result in unnecessary power consumption. Therefore, the electric water pump speed is kept stable within this range, and further adjustments are made only after the electronic thermostat is functioning normally.

[0086] The engine temperature adjustment device can adjust the engine temperature when the temperature difference between the engine cylinder head outlet water temperature and the target engine temperature is less than a second threshold, meaning the actual engine water temperature is lower than the target temperature. In this case, the engine temperature adjustment device can implement a negative correction mechanism on M3, that is, the electronic water pump correction speed M4 is set to a value less than 0 to reduce the speed of the electronic water pump. This slows down the rate at which the engine water temperature drops, allowing the actual water temperature to approach and reach the target temperature more quickly, avoiding overcooling in cold engine conditions.

[0087] The engine temperature adjustment device can adjust the engine temperature when the temperature difference between the engine cylinder head outlet water temperature and the target engine temperature is greater than or equal to the seventh threshold, indicating that the engine coolant temperature is too high or the cooling system efficiency is insufficient. In this case, the device can implement a positive correction mechanism on M3, meaning M2 is set to a value greater than 0, to gradually increase the operating speed of the electric water pump. By increasing the coolant flow rate, cooling efficiency is improved, effectively reducing the engine coolant temperature and preventing overheating.

[0088] The engine temperature adjustment device can be configured to set M5 to a value less than 0 when the vehicle is traveling at high speeds to maintain the balance and efficiency of the cooling system. This reduces the speed of the electric water pump, thereby decreasing the coolant flow through the radiator and moderately weakening the heat exchange capacity of the cooling system, preventing increased energy consumption and potential thermal stress problems caused by overcooling. Alternatively, when the vehicle is traveling at low speeds, the engine temperature adjustment device can be configured to set M5 to a value greater than 0. This increases the speed of the electric water pump, improves its operating rate, and increases the amount of coolant circulating in the radiator, thereby enhancing the heat exchange efficiency of the cooling system and ensuring that the engine operates stably within a suitable temperature range, preventing overheating.

[0089] The engine temperature adjustment device allows for setting M5 to a value less than 0 in low-temperature environments to reduce the speed of the electric water pump. Conversely, in high-temperature environments, it allows for setting M5 to a value greater than 0 to increase the speed of the electric water pump.

[0090] In one possible approach, when the cooling system is operating in heating mode, the adjustment strategy may include: determining the electric water pump speed M7 based on the engine cylinder head outlet water temperature and the HVAC flow request signal.

[0091] Specifically, when the heating mode is activated, the electric water pump speed M7 increases in stages according to the required heating flow rate. This dynamic adjustment mechanism ensures that the appropriate coolant flow rate is provided under different heating demands to meet the immediate and efficient heating needs of the entire vehicle.

[0092] Furthermore, under the same flow rate request boundary conditions, if the engine cylinder head outlet water temperature exceeds the preset temperature, it indicates that the engine has reached a higher thermal equilibrium state, and the liquid-air temperature difference within the heater core has increased, significantly improving heat exchange efficiency. In this scenario, to optimize energy consumption and efficiency, the electric water pump speed M7 can be appropriately reduced.

[0093] In one possible approach, when the cooling system is operating in EGR cooling mode, the adjustment strategy may include: the engine temperature adjustment device may determine the electric water pump speed M8 based on the EGR gas flow rate and the EGR outlet temperature.

[0094] Specifically, the engine temperature adjustment device can gradually increase the electric water pump speed (M8) based on the increase in EGR outlet gas temperature to ensure that the EGR outlet gas temperature does not exceed the EGR valve's temperature limit. This gradual increase in EGR gas flow rate also ensures that the EGR outlet gas temperature meets engine performance requirements, effectively improving combustion efficiency and fuel economy.

[0095] Furthermore, to prevent potential risks associated with activating the EGR cooling mode when the engine coolant temperature is too low, the system ensures safety by setting the enabling conditions for the EGR valve. Specifically, the EGR valve body is only allowed to open when the engine coolant temperature is greater than or equal to a third threshold.

[0096] In one possible approach, the engine temperature control device can control the cold start mode and EGR cooling mode in parallel, setting the electric water pump speed to max(M2, M8). Alternatively, the engine temperature control device can control the normal hot engine operation mode, heating mode, EGR cooling mode, and knock cooling mode in parallel, setting the electric water pump speed to max(M1, M6, M7, M8).

[0097] In one possible approach, when the cooling system is operating in waste heat recovery mode, the adjustment strategy may include: determining the electric water pump speed M7 (same as in heating mode) based on the engine cylinder head outlet water temperature and HVAC flow request signal.

[0098] Specifically, when users have high heating demands, the engine temperature adjustment device can activate either a water-based positive temperature coefficient heater (PTC) or a fan-based PTC heater. This helps to mitigate the rapid drop in engine coolant temperature caused by the heating system blowing air, ensuring the engine operates within a suitable temperature range while simultaneously meeting the need for rapid warming of the vehicle interior.

[0099] Alternatively, when users' heating needs are not high, natural heat dissipation from the heater core is usually sufficient. If the engine temperature adjustment device is insufficient in heat or the heating effect is poor, a water-based PTC heater can be used to heat the water, or a low-power air-based PTC heater can be used to blow air, thereby improving the heating effect.

[0100] In one possible approach, when the cooling system is in a shutdown-after-operation mode, the adjustment strategy may include: the engine temperature adjustment device may determine the electric water pump speed M9 and the subsequent operating time t based on the engine cylinder head outlet water temperature signal, and exit the shutdown-after-operation mode and cease operation when the subsequent operating time t reaches a time threshold or the engine cylinder head outlet water temperature is less than or equal to a sixth threshold.

[0101] Specifically, when the cooling system is in the shutdown operation mode, the engine temperature adjustment device can determine the electric water pump speed M9 based on the engine cylinder head outlet water temperature to maintain a certain coolant circulation, while recording the running time t. If the running time t reaches the time threshold, or the sixth threshold of the engine cylinder head outlet water temperature, the electric water pump will automatically stop working and exit the shutdown operation mode.

[0102] Furthermore, due to the unique operating conditions of hybrid engines—that is, the vehicle may still be in motion when the engine is shut down—the operating strategy after the electric water pump stops also integrates monitoring of the vehicle speed. The engine temperature adjustment device can, while the vehicle is in motion, not request the electric fan to operate to avoid unnecessary energy consumption and noise. Alternatively, while the vehicle is stationary, the system will request the electric fan to work in conjunction with the electric water pump to ensure cooling effectiveness. However, when the engine coolant temperature exceeds the fifth threshold, the system will unconditionally force the electric fan to start, working in conjunction with the electric water pump to rapidly reduce the coolant temperature and ensure the safe and stable operation of the engine and the vehicle's thermal management system.

[0103] In one possible approach, the engine temperature adjustment device can stop the operation of the electric water pump when the engine is stopped and the engine cylinder head coolant temperature is below a third threshold. The engine temperature adjustment device can also perform parallel control of the waste heat recovery mode and the post-stop operation mode when the engine is stopped and the engine cylinder head coolant temperature is above or below the third threshold, determining the electric water pump speed max (M7, M9).

[0104] In one possible approach, the engine temperature adjustment device can adjust the engine coolant temperature based on the electronic water pump speed, while simultaneously controlling the engine coolant temperature based on the electronic thermostat and the electronic fan.

[0105] Specifically, the engine temperature adjustment device can negatively correct the speed of the electric water pump when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than the first calibration value, thereby reducing its speed to reduce energy consumption, and turning off the heating function of the electronic thermostat, i.e., setting the PWM signal to 0 to avoid unnecessary energy consumption, and also turning off the electric fan.

[0106] Alternatively, the engine temperature adjustment device can ensure basic cooling circulation by not negatively correcting the electric water pump speed when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is greater than the first calibration value and less than the second calibration value. It can also adjust the electronic thermostat based on the PID control algorithm to gradually increase the duty cycle of the electronic thermostat according to the rise in engine water temperature, supplement heat or fine-tune the cooling effect in a timely manner, and continue to keep the electric fan off.

[0107] Alternatively, the engine temperature adjustment device can positively correct the electronic water pump when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is greater than the second calibration value and less than the third calibration value, and adjust the electronic thermostat based on the PID control algorithm to gradually increase its duty cycle according to the rise in engine water temperature, supplement heat in a timely manner or fine-tune the cooling effect, and not start the electronic fan.

[0108] Furthermore, the engine temperature adjustment device can positively correct the electronic water pump when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is greater than the third calibration value, and adjust the PWM signal of the electronic thermostat to the maximum. It can also intelligently select low-speed, medium-speed, or high-speed operating modes based on the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature to ensure that the engine is cooled in a timely and effective manner and prevent overheating damage.

[0109] Based on the technical solution in Figure 1, this application can ensure that the engine maintains a suitable temperature range under various operating conditions by monitoring vehicle operating parameters in real time and adjusting the working mode of the cooling system. This avoids performance degradation or damage caused by overheating, and provides more flexible and faster control over the multiple working modes of the cooling system, as well as more precise control over engine coolant temperature and less temperature fluctuation. Therefore, this application can effectively maintain the engine temperature within a suitable operating temperature range.

[0110] In some embodiments, as shown in FIG2, it is a schematic diagram of a temperature adjustment process provided in this application.

[0111] In one possible approach, the engine temperature control device can acquire vehicle operating parameters and determine the operating mode of the cooling system based on these parameters. The engine temperature control device can then determine the base speed and corrected speed of the electric water pump based on the cooling system's operating mode and the vehicle operating parameters. Furthermore, the engine temperature control device can control the activation of the electronic thermostat and the electric fan based on the vehicle operating parameters.

[0112] In some embodiments, as shown in FIG3, it is a schematic diagram of the classification of working modes of a cooling system provided in this application.

[0113] In one possible approach, when the engine is running, the cooling system operates in the following modes: cold start mode, normal operation mode, heating mode, EGR cooling mode, and knock cooling mode. When the engine is stopped, the cooling system operates in the following modes: post-stop operation mode and waste heat recovery mode.

[0114] In some embodiments, as shown in FIG4, it is a schematic diagram of an electronic water pump speed determination process provided in this application.

[0115] In one possible approach, the engine temperature adjustment device can stop the operation of the electric water pump when the engine is stopped and the engine cylinder head coolant temperature is below a third threshold.

[0116] In one possible approach, the engine temperature adjustment device can determine the waste heat recovery mode as the operating mode of the cooling system when the engine is stopped, the engine cylinder head outlet water temperature is greater than or equal to the third threshold, the engine cylinder head outlet water temperature is less than the fifth threshold, and the heating demand flow is not zero, and calculate the electronic water pump speed based on the engine cylinder head outlet water temperature and the heating demand flow.

[0117] In one possible approach, the engine temperature adjustment device can stop the operation of the electronic water pump when the engine is stopped, the engine cylinder head outlet water temperature is greater than or equal to a third threshold, the engine cylinder head outlet water temperature is less than a fifth threshold, and the heating demand flow is zero.

[0118] In one possible approach, the engine temperature adjustment device can determine the shutdown operation mode as the working mode of the cooling system when the engine is stopped, the engine cylinder head outlet water temperature is greater than or equal to the fifth threshold, and the engine cylinder head outlet water temperature is less than the sixth threshold. Based on the engine cylinder head outlet water temperature, it calculates the electric water pump speed and running time t, and based on the engine cylinder head outlet water temperature and vehicle speed, it calculates the running time of the electric fan.

[0119] In some embodiments, as shown in FIG5, it is a schematic diagram of another electronic water pump speed determination process provided in this application.

[0120] In one possible approach, the engine temperature adjustment device can determine the knock cooling mode as the operating mode of the cooling system and determine the electric water pump speed M1 as the maximum speed when the engine is in the running state and the engine's average retardation angle is greater than or equal to a first threshold.

[0121] In one possible approach, the engine temperature adjustment device can determine the cold start mode as the operating mode of the cooling system when the engine is in running condition, the engine's average retardation angle is less than a first threshold, and the first temperature difference is less than a second threshold. It then determines the electric water pump speed M2 based on the engine cylinder head outlet water temperature and engine power. The first temperature difference can be used to characterize the temperature difference between the engine cylinder head outlet water temperature and the engine's target temperature.

[0122] In one possible approach, the engine temperature adjustment device can determine the heating mode as the working mode of the cooling system when the engine is in the running state, the engine's average retardation angle is less than a first threshold, the engine cylinder head water temperature is greater than or equal to a third threshold, and the heating demand flow is not zero. Based on the engine cylinder head water temperature and the heating demand flow, the device can determine the electronic water pump speed M7.

[0123] In one possible approach, the engine temperature adjustment device can determine the EGR cooling mode as the operating mode of the cooling system when the engine cylinder head outlet water temperature is less than a third threshold and / or the heating demand flow is zero and the EGR outlet gas temperature is greater than or equal to a fourth threshold, and determine the electric water pump speed M8 based on the EGR outlet gas temperature and EGR gas flow.

[0124] In one possible approach, the engine temperature adjustment device can determine the normal operating mode of the cooling system as the operating mode when the engine is in running condition, the engine's average retardation angle is less than a first threshold, the first temperature difference is greater than or equal to a second threshold, the engine cylinder head coolant temperature is less than a third threshold, the heating demand flow is zero, and the EGR outlet temperature is less than a fourth threshold. The engine temperature adjustment device can determine the electronic water pump base speed based on engine speed and engine load, determine a first corrected speed based on the first temperature difference and engine power, and determine a second corrected speed based on vehicle speed and ambient temperature. The engine temperature adjustment device can then determine the electronic water pump speed (M6) as the sum of the electronic water pump base speed, the first corrected speed, and the second corrected speed.

[0125] In one possible approach, the engine temperature adjustment device can control the normal operating mode, heating mode, and EGR cooling mode of the hot engine in parallel, and determine the electric water pump speed as max (M6, M7, M8).

[0126] In some embodiments, as shown in FIG6, it is a schematic diagram of a heat engine normal operation mode adjustment strategy provided in this application.

[0127] In one possible approach, when the cooling system is in normal hot-engine operation mode, the engine temperature adjustment device can adjust the following strategies when the first temperature difference is less than a first calibrated value: negative correction of the electronic water pump speed, 0% duty cycle of the electronic thermostat, and shutdown of the electronic fan.

[0128] In one possible approach, the engine temperature adjustment device can have a first temperature difference greater than or equal to a first calibration value and less than a second calibration value. The adjustment strategy includes: using the base speed for the electronic water pump, using PID regulation for the duty cycle of the electronic thermostat, and turning off the electronic fan.

[0129] In one possible approach, the engine temperature adjustment device can have a second temperature difference greater than or equal to a third calibration value, but less than the third calibration value. The adjustment strategy includes: positive correction of the electronic water pump speed, PID regulation of the electronic thermostat duty cycle, and shutdown of the electronic fan. Alternatively, the adjustment strategy includes: positive correction of the electronic water pump speed, continuous use of maximum PWM by the electronic thermostat, and activation of the electronic fan with its speed determined based on the first temperature difference.

[0130] The above primarily describes the solutions provided by the embodiments of this application from a methodological perspective. To achieve the above functions, the engine temperature adjustment device or electronic device includes corresponding hardware structures and / or software modules for performing each function. Those skilled in the art should readily recognize that, based on the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein, this application can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0131] This application embodiment can, based on the above method, exemplarily divide the engine temperature adjustment device or electronic device into functional modules. For example, the engine temperature adjustment device or electronic device may include functional modules corresponding to each functional division, or two or more functions may be integrated into one processing module. The integrated module can be implemented in hardware or as a software functional module. It should be noted that the module division in this application embodiment is illustrative and only represents one logical functional division; in actual implementation, there may be other division methods.

[0132] Figure 7 is a block diagram illustrating an engine temperature adjustment device according to an exemplary embodiment. Referring to Figure 7, the engine temperature adjustment device 700 includes: an acquisition unit 201, a determination unit 202, and an adjustment unit 203.

[0133] In one possible approach, the acquisition unit 201 is used to acquire the vehicle's operating parameters.

[0134] In one possible approach, the determining unit 202 is used to determine the operating mode of the cooling system that matches the vehicle's operating parameters.

[0135] In one possible approach, the adjustment unit 203 is used to adjust the engine temperature via the cooling system based on an adjustment strategy corresponding to the operating mode.

[0136] In one possible approach, the determining unit 202 is specifically used to: determine a first operating mode based on vehicle operating parameters when the engine is in a running state and the engine's average retardation angle is less than a first threshold; the first operating mode includes: cold start mode, hot engine normal operation mode, heating mode, and EGR cooling mode.

[0137] In one possible approach, the determining unit 202 is specifically used to: determine a first operating mode based on vehicle operating parameters when the engine is in a running state and the engine's average retardation angle is less than a first threshold; the first operating mode includes: cold start mode, hot engine normal operation mode, heating mode, and EGR cooling mode; and determine the knock cooling mode as the operating mode of the cooling system when the engine is in a running state and the engine's average retardation angle is greater than or equal to the first threshold.

[0138] In one possible approach, the determining unit 202 is specifically configured to: determine the cold start mode as the operating mode of the cooling system when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than a second threshold; and determine the hot engine normal operation mode as the operating mode of the cooling system when the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than the second threshold, the engine cylinder head outlet water temperature is less than a third threshold, the heating demand flow is zero, and the EGR outlet temperature is less than a fourth threshold. When the engine cylinder head outlet water temperature is greater than or equal to the third threshold and the heating demand flow is not zero, the heating mode is determined as the operating mode of the cooling system; and when the engine cylinder head outlet water temperature is less than the third threshold and / or the heating demand flow is zero, and the EGR outlet temperature is greater than or equal to the fourth threshold, the EGR cooling mode is determined as the operating mode of the cooling system.

[0139] In one possible approach, the determining unit 202 is specifically used to: determine the operating mode of the cooling system that matches the engine cylinder head outlet water temperature when the engine is in a stopped state.

[0140] In one possible approach, the determining unit 202 is specifically used to: determine the shutdown operation mode as the working mode of the cooling system when the engine cylinder head outlet water temperature is greater than or equal to the fifth threshold; and determine the waste heat recovery and utilization mode as the working mode of the cooling system when the engine cylinder head outlet water temperature is greater than or equal to the third threshold and the heating demand flow is not zero.

[0141] In one possible approach, the determining unit 202 is also used to exit the post-shutdown operating mode when the engine cylinder head outlet water temperature is less than a sixth threshold.

[0142] In one possible approach, the adjustment unit 203 is specifically used to: determine the target speed, target duty cycle, and target gear based on the adjustment strategy corresponding to the working mode and the vehicle operating parameters; adjust the speed of the electric water pump to the target speed, adjust the duty cycle of the electronic thermostat to the target duty cycle, and adjust the gear of the electric fan to the target gear.

[0143] In one possible implementation, the adjustment unit 203 is specifically configured to: determine that the target speed is lower than the current speed, the target duty cycle is zero, and the target gear is off when the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is less than a first calibration value; determine that the target speed is the current speed, the target duty cycle is PID-controlled, and the target gear is off when the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than or equal to the first calibration value and less than a second calibration value; determine that the target speed is greater than the current speed, the target duty cycle is PID-controlled, and the target gear is off when the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than or equal to the second calibration value and less than a third calibration value; and determine that the target speed is greater than the current speed, the target duty cycle is the maximum value, and the target gear is on when the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than the third calibration value.

[0144] In one possible approach, the adjustment unit 203 is specifically used to: determine the operating time of the electric water pump based on the engine cylinder head outlet water temperature; and determine the operating time of the electric fan based on the vehicle speed and the engine cylinder head outlet water temperature.

[0145] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0146] Figure 8 is a block diagram illustrating an electronic device according to an exemplary embodiment. As shown in Figure 8, the electronic device 300 includes, but is not limited to, a processor 301 and a memory 302.

[0147] The memory 302 described above is used to store the executable instructions of the processor 301. It is understood that the processor 301 is configured to execute instructions to implement the engine temperature adjustment method in the above embodiment.

[0148] It should be noted that those skilled in the art will understand that the electronic device structure shown in FIG8 does not constitute a limitation on the electronic device. The electronic device may include more or fewer components than shown in FIG8, or combine certain components, or have different component arrangements.

[0149] Processor 301 is the control center of the electronic device. It connects various parts of the electronic device via various interfaces and lines. By running or executing software programs and / or modules stored in memory 302, and by calling data stored in memory 302, it performs various functions and processes data, thereby providing overall monitoring of the electronic device. Processor 301 may include one or more processing units. Optionally, processor 301 may integrate an application processor and a modem processor. The application processor mainly handles the operating system, user interface, and applications, while the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into processor 301.

[0150] The memory 302 can be used to store software programs and various data. The memory 302 may primarily include a program storage area and a data storage area. The program storage area may store the operating system, application programs required by at least one functional module (such as a determination unit, processing unit, etc.), etc. Furthermore, the memory 302 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0151] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 302 including instructions, which can be executed by a processor 301 of an electronic device 300 to implement the methods in the above embodiments.

[0152] In actual implementation, the functions of the acquisition unit 201, determination unit 202, and adjustment unit 203 in Figure 7 can all be implemented by the processor 301 in Figure 8 calling the computer program stored in the memory 302. The specific execution process can be found in the description of the method section in the above embodiments, and will not be repeated here.

[0153] Optionally, the computer-readable storage medium may be a non-transitory computer-readable storage medium, such as a read-only memory (ROM), random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.

[0154] In an exemplary embodiment, this application also provides a computer program product including one or more instructions, which can be executed by a processor 301 of an electronic device to perform the methods described above.

[0155] It should be noted that when one or more instructions in the computer-readable storage medium or computer program product are executed by the processor of an electronic device, they implement the various processes of the above method embodiments and achieve the same technical effect as the above method. To avoid repetition, they will not be described again here.

[0156] Through the above description of the embodiments, those skilled in the art can clearly understand that, for the sake of convenience and brevity, only the division of the above functional modules is used as an example. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0157] In the several embodiments provided in this application, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another apparatus, or some features may be ignored or not executed. Furthermore, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0158] The units described as separate components may or may not be physically separate. A component shown as a unit can be one or more physical units; that is, it can be located in one place or distributed in multiple different locations. Some or all of the constituent units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0159] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0160] 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 readable storage medium. Based on this understanding, the technical solution of the embodiments of this application, essentially, or the part that contributes to the prior art, or a complete or partial classification of the technical solution, can be embodied in the form of a software product. This software product is stored in a storage medium and includes several instructions to cause a device (which may be a microcontroller, chip, etc.) or processor to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0161] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for adjusting engine temperature, characterized in that, include: Obtain the vehicle's operating parameters; Determine the operating mode of the cooling system that matches the vehicle's operating parameters; Based on the adjustment strategy corresponding to the operating mode, the state of one or more temperature control devices in the cooling system is adjusted to adjust the engine temperature.

2. The method according to claim 1, characterized in that, The operating modes of the cooling system include at least one of the following: cold start mode, hot normal operation mode, heating mode, exhaust gas recirculation (EGR) cooling mode, detonation cooling mode, shutdown operation mode, and waste heat recovery and utilization mode.

3. The method according to claim 2, characterized in that, The vehicle operating parameters include the engine's average retardation angle, and determining the operating mode of the cooling system that matches the vehicle operating parameters includes: When the engine is in operation and the engine's average retardation angle is less than a first threshold, the operating mode of the cooling system is determined as a first operating mode based on the vehicle's operating parameters; the first operating mode includes: the cold start mode, the hot engine normal operation mode, the heating mode, and the EGR cooling mode; When the engine is in operation and the engine's average retardation angle is greater than or equal to a first threshold, the operating mode of the cooling system is determined to be the knock cooling mode.

4. The method according to claim 3, characterized in that, The vehicle operating parameters include: engine cylinder head outlet water temperature, engine target temperature, heating demand flow rate, and EGR outlet air temperature; based on the vehicle operating parameters, determining the cooling system's operating mode as the first operating mode includes: When the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than a second threshold, the operating mode of the cooling system is determined to be the cold start mode. When the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than a second threshold, the engine cylinder head outlet water temperature is less than a third threshold, the heating demand flow is zero, and the EGR outlet air temperature is less than a fourth threshold, the working mode of the cooling system is determined to be the normal working mode of the heat engine. When the engine cylinder head outlet water temperature is greater than or equal to the third threshold and the heating demand flow rate is not zero, the working mode of the cooling system is determined to be the heating mode. When the engine cylinder head outlet water temperature is less than the third threshold and / or the heating demand flow rate is zero, and the EGR outlet air temperature is greater than or equal to the fourth threshold, the operating mode of the cooling system is determined to be the EGR cooling mode.

5. The method according to claim 2, characterized in that, The process of determining the operating mode of the cooling system that matches the vehicle's operating parameters includes: When the engine is in a stopped state, determine the operating mode of the cooling system that matches the outlet water temperature of the engine cylinder head.

6. The method according to claim 5, characterized in that, The determination of the operating mode of the cooling system that matches the outlet water temperature of the engine cylinder head includes: When the engine cylinder head outlet water temperature is greater than or equal to the fifth threshold, the operating mode of the cooling system is determined to be the shutdown operation mode; When the engine cylinder head outlet water temperature is greater than or equal to the third threshold and the heating demand flow rate is not zero, the operating mode of the cooling system is determined to be the waste heat recovery and utilization mode.

7. The method according to claim 6, characterized in that, The method further includes: If the engine cylinder head outlet water temperature is lower than the sixth threshold, exit the shutdown operation mode.

8. The method according to claim 7, characterized in that, The temperature control equipment of the cooling system includes an electronic water pump, an electronic thermostat, and an electronic fan; The adjustment strategy based on the operating mode, and the adjustment of the state of one or more temperature control devices in the cooling system, include: Based on the adjustment strategy corresponding to the working mode and the vehicle operating parameters, the target speed, target duty cycle, and target gear are determined. The speed of the electronic water pump is adjusted to the target speed, the duty cycle of the electronic thermostat is adjusted to the target duty cycle, and the speed of the electronic fan is adjusted to the target speed.

9. The method according to claim 8, characterized in that, When the operating mode is the normal operating mode of the hot engine, determining the target speed, target duty cycle, and target gear based on the adjustment strategy corresponding to the operating mode and the vehicle operating parameters includes: If the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is less than the first calibration value, the target speed is determined to be less than the current speed, the target duty cycle is zero, and the target gear is the off gear. If the temperature difference between the engine cylinder head outlet water temperature and the engine target temperature is greater than or equal to the first calibration value and less than the second calibration value, the target speed is determined to be the current speed, the target duty cycle is PID regulation, and the target gear is the off gear. If the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than or equal to the second calibration value and less than the third calibration value, the target speed is determined to be greater than the current speed, the target duty cycle is PID controlled, and the target gear is the off gear; if the temperature difference between the engine cylinder head coolant temperature and the engine target temperature is greater than the third calibration value, the target speed is determined to be greater than the current speed, the target duty cycle is the maximum value, and the target gear is the on gear.

10. The method according to claim 8, characterized in that, The vehicle operating parameters include vehicle speed; when the operating mode is a shutdown-after-operation mode, the method includes: The operating time of the electronic water pump is determined based on the engine cylinder head outlet water temperature. The operating time of the electric fan is determined based on the vehicle speed and the engine cylinder head coolant temperature.

11. An engine temperature adjustment device, characterized in that, The device includes: an acquisition unit, a determination unit, and an adjustment unit; The acquisition unit is used to acquire the vehicle's operating parameters; The determining unit is used to determine the operating mode of the cooling system that matches the vehicle operating parameters; The adjustment unit is used to adjust the engine temperature through the cooling system based on the adjustment strategy corresponding to the operating mode.

12. A vehicle, characterized in that, The vehicle includes the device as described in claim 8.

13. An electronic device, characterized in that, include: processor; Memory used to store the processor's executable instructions; The processor is configured to execute the instructions to implement the method as described in any one of claims 1 to 10.

14. A computer-readable storage medium, characterized in that, When the computer-executable instructions stored in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device is capable of performing the method as described in any one of claims 1 to 10.

15. A computer program product containing instructions, characterized in that, When the instructions are executed by a computer, the computer performs the method as described in any one of claims 1 to 10.

Images