Engine temperature adjusting method and device, vehicle, equipment and storage medium

Abstract

The invention relates to an engine temperature adjusting method and device, a vehicle, equipment and a storage medium, and relates to the technical field of engines. The method comprises the following steps: acquiring vehicle operation parameters of a vehicle; determining a working mode of a cooling system matched with the vehicle operation parameters; and on the basis of an adjusting strategy corresponding to the working mode, the state of one or more temperature control devices in the cooling system is adjusted so as to adjust the temperature of the engine. Therefore, the temperature of the engine can be effectively maintained in a proper working temperature range.

Description

Technical Field

[0001] The present application relates to the field of engine technology, in particular to the field of engine temperature control technology, and specifically to a method, device, vehicle, equipment, and storage medium for adjusting engine temperature. Background Art

[0002] As the core component that efficiently converts gasoline chemical energy into mechanical energy, the engine releases a huge amount of heat energy during fuel combustion. In order to ensure engine performance, it is often necessary to maintain the engine temperature in an appropriate operating temperature range through a cooling system.

[0003] In the related technology, CN110805437A can achieve pre-control by outputting the target speed of the electronic fan and the basic pump speed, thereby improving the responsiveness of the system, and jointly correcting the basic pump speed by PID and the ambient temperature to improve the control accuracy, so as to control the speed of the electronic water pump. However, the advantages of the electronic water pump are not fully utilized, and the temperature of the engine cannot be accurately maintained in a suitable operating temperature range.

[0004] In the related technology, CN117685089A can analyze the engine target water temperature and the real-time water temperature difference, and calculate the target speed under different speeds and torques based on the external temperature and PID feedback, but does not consider different working conditions, and thus cannot accurately maintain the engine temperature in a suitable operating temperature range.

[0005] Therefore, it is necessary to explore effective ways to maintain the engine temperature within a suitable operating temperature range. Summary of the invention

[0006] The present application provides an engine temperature adjustment method, device, vehicle, equipment, and storage medium to at least solve the technical problem in the related art that it is difficult to maintain the engine temperature within a suitable operating temperature range. The technical solution of the present application is as follows:

[0007] According to the first aspect provided by the present application, a method for adjusting the temperature of an engine is provided, comprising: obtaining vehicle operating parameters of a vehicle; determining an operating mode of a cooling system that matches 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 to adjust the temperature of the engine. According to the above technical means, the present application can ensure that the engine can be maintained within a suitable temperature range under various operating conditions by real-time monitoring of the vehicle operating parameters and adjusting the operating mode of the cooling system, thereby avoiding performance degradation or damage caused by overheating, and controlling the multiple operating modes of the cooling system more flexibly, with a faster response speed, and more accurate control of the engine water temperature, with smaller water temperature fluctuations. Therefore, the present application can effectively maintain the temperature of the engine within a suitable operating temperature range.

[0008] In one possible manner, the operating mode of the cooling system includes at least one of the following: cold engine start mode, hot engine normal operating mode, heating mode, exhaust gas recirculation system EGR cooling mode, knock cooling mode, post-shutdown operation mode, and waste heat recovery mode.

[0009] Based on the above technical means, the present application can enable the cooling system to flexibly adjust the working state according to the specific needs under different working 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 vehicle interior environment.

[0010] In one possible manner, the vehicle operating parameters include the average de-ignition angle of the engine, and the operating mode of the cooling system matching the vehicle operating parameters is determined, including: when the engine state is an operating state and the average de-ignition angle of the engine is less than a first threshold value, the operating mode of the cooling system is determined as a first operating mode according to the vehicle operating parameters; the first operating mode includes: cold engine start mode, hot engine normal operating mode, heating mode, EGR cooling mode; when the engine state is an operating state and the average de-ignition angle of the engine is greater than or equal to the first threshold value, the operating mode of the cooling system is determined as a knock cooling mode.

[0011] In one possible manner, the vehicle operating parameters include: engine cylinder head water outlet temperature, engine target temperature, heating demand flow, EGR outlet temperature; according to the vehicle operating parameters, determining the working mode of the cooling system as the first working mode includes: when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than the second threshold, determining the working mode of the cooling system as the cold engine start mode; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than the second threshold, the engine cylinder head water outlet temperature is less than the third threshold, the heating demand flow is zero, and the EGR outlet temperature is less than the fourth threshold, determining the working mode of the cooling system as the hot engine normal working mode. When the engine cylinder head water outlet temperature is greater than or equal to the third threshold and the heating demand flow is not zero, determining the working mode of the cooling system as the heating mode; when the engine cylinder head water outlet 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, determining the working mode of the cooling system as the EGR cooling mode.

[0012] In one possible manner, determining the operating mode of the cooling system that matches the vehicle operating parameters includes: when the engine is in a shutdown state, determining the operating mode of the cooling system that matches the water outlet temperature of the engine cylinder head.

[0013] In one possible manner, the operating mode of the cooling system that matches the engine cylinder head water outlet temperature is determined, including: when the engine cylinder head water outlet temperature is greater than or equal to a fifth threshold, determining the operating mode of the cooling system as a post-shutdown operation mode; when the engine cylinder head water outlet temperature is greater than or equal to a third threshold and the heating demand flow is not zero, determining the operating mode of the cooling system as a waste heat recovery mode.

[0014] In one possible manner, the method further includes: when the water outlet temperature of the engine cylinder head is less than a sixth threshold value, exiting the post-shutdown operation mode.

[0015] In one possible embodiment, 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 working 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 working mode and the 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.

[0016] In one possible manner, when the working mode is the normal working mode of the thermal engine, the target speed, target duty cycle and target gear are determined based on the adjustment strategy corresponding to the working mode and the vehicle operating parameters, including: when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than a first calibration value, determining that the target speed is less than the current speed, the target duty cycle is zero, and the target gear is the closed gear; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than or equal to the first calibration value and less than the second calibration value, determining that the target speed is the current speed, the target duty cycle is PID adjustment, and the target gear is the closed gear; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than or equal to the second calibration value and less than the third calibration value, determining that the target speed is greater than the current speed, the target duty cycle is PID adjustment, and the target gear is the closed gear; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than the third calibration value, determining that the target speed is greater than the current speed, the target duty cycle is the maximum value, and the target gear is the open gear.

[0017] In one possible manner, the vehicle operating parameters include vehicle speed; when the operating mode is a post-shutdown operating mode, the method includes: determining the operating time of the electronic water pump based on the water outlet temperature of the engine cylinder head; determining the operating time of the electronic fan based on the vehicle speed and the water outlet temperature of the engine cylinder head.

[0018] According to the second aspect provided by the present application, a device for adjusting the engine temperature is provided, the device including: an acquisition unit, a determination unit, and an adjustment unit; the acquisition unit is used to acquire vehicle operating parameters of the vehicle; the determination unit is used to determine an operating mode of the cooling system that matches the vehicle operating parameters; the adjustment unit is used to adjust the temperature of the engine through the cooling system based on an adjustment strategy corresponding to the operating mode.

[0019] In one possible manner, the determination unit is specifically configured to: determine a first operating mode according to vehicle operating parameters when the engine state is in an operating state and the average de-ignition angle of the engine is less than a first threshold value; the first operating mode includes: a cold engine start mode, a hot engine normal operating mode, a heating mode, and an EGR cooling mode;

[0020] In one possible manner, the determination unit is specifically used to: when the engine state is in an operating state and the average de-ignition angle of the engine is less than a first threshold, determine the first operating mode according to the vehicle operating parameters; the first operating mode includes: cold engine start mode, hot engine normal operating mode, heating mode, EGR cooling mode; when the engine state is in an operating state and the average de-ignition angle of the engine is greater than or equal to the first threshold, determine the knock cooling mode as the operating mode of the cooling system.

[0021] In one possible manner, the determination unit is specifically used to: determine the cold engine start mode as the working mode of the cooling system when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than the second threshold; determine the heat engine normal working mode as the working mode of the cooling system when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than the second threshold, the engine cylinder head water outlet temperature is less than the third threshold, the heating demand flow is zero, and the EGR outlet temperature is less than the fourth threshold. When the engine cylinder head water outlet temperature is greater than or equal to the third threshold and the heating demand flow is not zero, determine the heating mode as the working mode of the cooling system; when the engine cylinder head water outlet 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, determine the EGR cooling mode as the working mode of the cooling system.

[0022] In one possible manner, the determination unit is specifically used to: when the engine is in a shutdown state, determine an operating mode of the cooling system that matches the water outlet temperature of the engine cylinder head.

[0023] In one possible manner, the determination unit is specifically used to: when the water outlet temperature of the engine cylinder head is greater than or equal to a fifth threshold value, determine the post-shutdown operation mode as the working mode of the cooling system; when the water outlet temperature of the engine cylinder head is greater than or equal to a third threshold value and the heating demand flow is not zero, determine the waste heat recovery mode as the working mode of the cooling system.

[0024] In one possible manner, the determination unit is further configured to exit the post-shutdown operation mode when the water outlet temperature of the engine cylinder head is less than a sixth threshold value.

[0025] In one possible manner, the adjustment unit is specifically used to: determine a target speed, a target duty cycle, and a target gear position based on an adjustment strategy corresponding to the working mode and a vehicle operating parameter;

[0026] The speed of the electronic water pump is adjusted to a target speed, the duty cycle of the electronic thermostat is adjusted to a target duty cycle, and the gear position of the electronic fan is adjusted to a target gear position.

[0027] In one possible manner, the adjustment unit is specifically used to: when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than a first calibration value, determine that the target speed is less than the current speed, the target duty cycle is zero, and the target gear is a closed gear; when the temperature difference between the engine cylinder head water outlet 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 the current speed, the target duty cycle is PID adjustment, and the target gear is a closed gear; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than or equal to the second calibration value, and less than a third calibration value, determine that the target speed is greater than the current speed, the target duty cycle is PID adjustment, and the target gear is a closed gear; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than the third calibration value, determine that the target speed is greater than the current speed, the target duty cycle is the maximum value, and the target gear is an open gear.

[0028] In one possible manner, the adjustment unit is specifically used to: determine the operating time of the electronic water pump based on the water outlet temperature of the engine cylinder head; determine the operating time of the electronic fan based on the vehicle speed and the water outlet temperature of the engine cylinder head.

[0029] According to the third aspect provided by the present application, an electronic device is provided, comprising: a processor; a memory for storing processor executable instructions; wherein the processor is configured to execute instructions to implement the method of the above-mentioned first aspect and any possible implementation manner thereof.

[0030] According to the fourth aspect provided by the present application, a computer-readable storage medium is provided. When the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device is enabled to execute the method in the above-mentioned first aspect and any possible implementation method thereof.

[0031] According to the fifth aspect provided by the present application, a computer program product is provided, the computer program product comprising computer instructions, and when the computer instructions are executed on an electronic device, the electronic device executes the method of the above-mentioned first aspect and any possible implementation manner thereof.

[0032] Therefore, the above technical features of the present application have the following beneficial effects:

[0033] (1) By real-time monitoring of vehicle operating parameters and adjusting the working mode of the cooling system, the engine can be maintained within a suitable temperature range under various operating conditions to avoid performance degradation or damage due to overheating. The multiple working modes of the cooling system can be controlled more flexibly, with faster response speed, more precise control of the engine water temperature, and smaller water temperature fluctuations. Therefore, the present application can effectively maintain the temperature of the engine within a suitable operating temperature range.

[0034] (2) The cooling system can flexibly adjust its working state according to the specific needs under different working 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 vehicle interior environment.

[0035] It should be noted that the technical effects brought about by any implementation method in the second to fifth aspects can refer to the technical effects brought about by the corresponding implementation method in the first aspect, and will not be repeated here.

[0036] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0038] Figure 1 is a flow chart showing a method for adjusting engine temperature according to an exemplary embodiment;

[0039] Figure 2 is a schematic diagram showing a temperature adjustment process according to an exemplary embodiment;

[0040] Figure 3is a schematic diagram of classification of working modes of a cooling system according to an exemplary embodiment;

[0041] Figure 4 is a schematic diagram showing a process for determining a rotation speed of an electronic water pump according to an exemplary embodiment;

[0042] Figure 5 is a schematic diagram showing another process for determining the speed of an electronic water pump according to an exemplary embodiment;

[0043] Figure 6 is a schematic diagram showing a normal working mode adjustment strategy of a heat engine according to an exemplary embodiment;

[0044] Figure 7 is a block diagram of a device for adjusting engine temperature according to an exemplary embodiment;

[0045] Figure 8 It is a block diagram of an electronic device according to an exemplary embodiment. DETAILED DESCRIPTION

[0046] In order to enable ordinary persons in the art to better understand the technical solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0047] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0048] As mentioned in the background technology, in order to effectively maintain the temperature of the engine within a suitable operating temperature range, the present application provides a method for adjusting the engine temperature, which can obtain the vehicle operating parameters of the vehicle and determine the operating mode of the cooling system that matches the vehicle operating parameters, so as to further adjust the temperature of the engine through the cooling system based on the adjustment strategy corresponding to the operating mode.

[0049] For ease of understanding, the engine temperature adjustment method provided in the present application is specifically introduced below with reference to the accompanying drawings.

[0050] Figure 1 is a flow chart of a method for adjusting engine temperature according to an exemplary embodiment. Figure 1As shown, the method for adjusting the engine temperature includes the following steps: S101-S103.

[0051] S101. An engine temperature adjustment device obtains vehicle operating parameters of a vehicle.

[0052] Among them, the vehicle operating parameters include engine status, engine cylinder head water outlet temperature, engine target temperature, EGR outlet temperature, heating demand flow, exhaust gas recirculation (EGR) gas flow, average de-ignition angle signal, vehicle speed, ambient temperature, etc.

[0053] It is understood that the engine cylinder head water outlet temperature refers to the temperature of the coolant flowing out of the cylinder head water outlet after the cooling system flows through the engine cylinder head. The engine target temperature refers to the optimal operating temperature range recommended by the engine design or manufacturer. This temperature range is usually determined based on a comprehensive consideration of factors such as engine performance, fuel economy, emissions and durability. The heating demand flow refers to the coolant flow that the cooling system needs to provide to the heater system in order to meet the vehicle's internal heating needs. The size of this flow depends on the vehicle's temperature setting, the external ambient temperature and the passengers' demand for heating. The EGR outlet temperature refers to the temperature of the exhaust gas that is recirculated into the engine combustion chamber after being treated by the EGR system. The engine state refers to the operating condition of the engine at a certain moment. The average de-ignition angle of the engine (also called the ignition advance angle or the ignition lag angle) refers to the crankshaft angle before the piston reaches the top dead center when the spark plug sparks during engine operation.

[0054] In one possible manner, a temperature sensor and a vehicle speed sensor may be deployed on the vehicle. The engine temperature adjustment device may measure the engine cylinder head water outlet temperature in real time based on a temperature sensor deployed near the engine cylinder head or the water outlet of the cooling system. The engine temperature adjustment device may measure the EGR gas outlet temperature in real time based on a temperature sensor deployed near the EGR valve. The engine temperature adjustment device may obtain the ambient temperature based on the temperature sensor on the vehicle. The engine temperature adjustment device may obtain the real-time vehicle speed based on the vehicle speed sensor deployed on the vehicle.

[0055] S102: The engine temperature adjustment device determines a working mode of the cooling system that matches the vehicle operating parameters.

[0056] It should be noted that the operating modes of the cooling system may include at least one of the following: cold engine start mode, hot engine normal operating mode, heating mode, EGR cooling mode, knock cooling mode, post-shutdown operation mode, and waste heat recovery mode.

[0057] In one possible way, when the engine or equipment is cold started, the cooling system will use the cold engine start mode to quickly heat the engine to the normal operating temperature. When the engine or equipment reaches the normal operating temperature, the cooling system will enter a stable operating mode, that is, the hot engine normal operating mode. In situations where it is necessary to provide heating inside the vehicle or equipment, the cooling system will switch to the heating mode. The EGR cooling mode refers to the process of cooling part of the exhaust gas discharged by the engine before reintroducing it into the combustion chamber to reduce the temperature of the exhaust gas. In some high-performance engines, in order to prevent knock, the knock cooling mode may be used. In some cases, in order to prevent the engine or equipment from overheating after shutdown, the cooling system may continue to run for a period of time, that is, the post-shutdown operation mode. The waste heat recovery mode is to recover and utilize the waste heat generated by the engine or equipment during operation.

[0058] In one possible manner, the engine temperature adjustment device can determine the first operating mode according to the vehicle operating parameters when the engine state is in the running state and the average de-ignition angle of the engine is less than the first threshold value. The first operating mode may include: cold engine start mode, hot engine normal operating mode, heating mode, and EGR cooling mode.

[0059] Optionally, the first threshold value may be set according to actual needs. For example, the first threshold value may be 60 degrees or 90 degrees. This application does not impose any specific restrictions on this.

[0060] Specifically, the engine temperature adjustment device may determine the cold engine 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.

[0061] Optionally, the second threshold value may be set according to actual needs. For example, the second threshold value may be 30 or 40. This application does not impose any specific limitation on this.

[0062] The engine temperature adjustment device can determine the normal working mode of the heat engine as the working mode of the cooling system when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than a second threshold, the engine cylinder head water outlet temperature is less than a third threshold, the heating demand flow is zero, and the EGR outlet temperature is less than a fourth threshold.

[0063] Optionally, the third threshold value may be set according to actual needs. For example, the third threshold value may be 60 degrees or 70 degrees. This application does not impose any specific restrictions on this.

[0064] Optionally, the fourth threshold value may be set according to actual needs. For example, the fourth threshold value may be 80 degrees or 100 degrees. This application does not impose any specific restrictions on this.

[0065] The engine temperature adjustment device can determine the heating mode as the working mode of the cooling system when the water outlet temperature of the engine cylinder head is greater than or equal to the third threshold and the heating demand flow is not zero.

[0066] 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 temperature is greater than or equal to the fourth threshold.

[0067] In one possible manner, when the engine state is in the running state and the average de-ignition angle of the engine is greater than or equal to a first threshold, the knock cooling mode is determined as the working mode of the cooling system.

[0068] In yet another possible manner, when the engine is in a shutdown state, an operating mode of the cooling system that matches the water outlet temperature of the engine cylinder head is determined.

[0069] Specifically, the engine temperature adjustment device can determine the post-shutdown operation mode as the working mode of the cooling system when the water outlet temperature of the engine cylinder head is greater than or equal to the fifth threshold, and exit the post-shutdown operation mode when the water outlet temperature of the engine cylinder head is less than the sixth threshold.

[0070] Optionally, the fifth threshold value may be set according to actual needs. For example, the fifth threshold value may be 100 degrees or 120 degrees. This application does not impose any specific restrictions on this.

[0071] Optionally, the sixth threshold value may be set according to actual needs. For example, the sixth threshold value may be 90 degrees or 80 degrees. The sixth threshold value is greater than the third threshold value and less than the fifth threshold value. This application does not make specific restrictions on this.

[0072] The engine temperature adjustment device can determine the waste heat recovery mode as the working mode of the cooling system when the water outlet temperature of the engine cylinder head is greater than or equal to the third threshold and the heating demand flow is not zero.

[0073] 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 to adjust the temperature of the engine.

[0074] It should be noted that the cooling system may include an electronic water pump, an electronic fan and an electronic thermostat. Different working modes correspond to different electronic water pump speeds, different electronic fan start-up conditions, and different electronic thermostat start-up conditions.

[0075] In one possible manner, when the working mode of the cooling system is the knock cold zone mode, the adjustment strategy may include: the engine temperature adjustment device may determine the electronic water pump speed M1 based on the engine average de-ignition angle signal. The electronic water pump speed M1 may be the maximum value of the electronic water pump, forcing the maximum capacity to be used to cool the engine, reducing the base temperature of the engine, so as to suppress the knock tendency of the engine.

[0076] In one possible manner, when the operating mode of the cooling system is the cold engine start mode, the adjustment strategy may include: the engine temperature adjustment device may determine the electronic water pump operating speed M2 based on the engine cylinder head water outlet temperature and the engine power.

[0077] Specifically, when the water outlet temperature of the engine cylinder head is at a low level, in order to accelerate the temperature rise process of the engine body and the engine oil, and at the same time avoid the risk of abnormal increase in the oil level, the engine temperature adjustment device can determine the electronic water pump speed M2 to 0, that is, stop working, thereby reducing the heat exchange between the coolant and the engine matrix.

[0078] As the temperature of the water outlet from the engine cylinder head gradually increases, the electronic water pump begins to work, and the engine temperature adjustment device can determine the electronic water pump speed M2 as the basic speed. This ensures that the temperature sensor can accurately collect the temperature of the water outlet from the engine cylinder head, provide reliable feedback to the engine control system, and maintain a reasonable temperature difference between the engine water inlet and outlet temperatures to ensure the safety and efficiency of engine operation.

[0079] Furthermore, as the engine power increases, in order to effectively suppress the engine knock tendency and prevent boiling in the integrated exhaust manifold (IEM) area, the engine temperature adjustment device can step-by-step increase the electronic water pump speed M2 according to the power increase, thereby ensuring stable operation of the engine under high load conditions.

[0080] In addition, in cold engine start mode, the operation strategy of the electronic water pump also needs to focus on protecting the engine heat to prevent it from being lost due to responding to non-essential functions such as vehicle heating. By temporarily shutting down the linkage with vehicle heating and other functions, the electronic water pump fully supports the rapid warm-up process of the engine, so that the engine can reach the ideal operating temperature in the shortest time, improving overall operating efficiency and reliability.

[0081] In one possible manner, when the working mode of the cooling system is the normal working mode of the thermal engine, the adjustment strategy may include: the engine temperature adjustment device may determine the electronic water pump basic speed M3 based on the engine speed and the engine load signal, and determine the 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 the second correction speed M5 based on the vehicle speed and the ambient temperature. The engine temperature adjustment device may determine the electronic water pump speed M6 as the sum of the electronic water pump basic speed M3, the first correction speed M4, and the second correction speed M5.

[0082] Specifically, the engine temperature adjustment device can gradually increase the electronic water pump speed M3 as the engine speed increases, and gradually increase the electronic water pump speed M3 as the engine load increases. The engine temperature adjustment device or the staff can determine the target cooling water temperature at different speeds and loads according to the design requirements and working conditions of the engine. The target water temperature is a key parameter to ensure the normal operation and optimal performance of the engine. The engine temperature adjustment device can allow the cooling water to start circulating by controlling the opening of the electronic thermostat on the basis of reaching the target water temperature. The precise control of the electronic thermostat is essential for achieving fast and stable cooling water temperature regulation. The engine temperature adjustment device can observe and record the temperature difference between the engine inlet and outlet water by adjusting the electronic water pump speed after the electronic thermostat is turned on. This step is to find the optimal water pump speed that can maintain the predetermined inlet and outlet water temperature difference under different speeds and load conditions. The engine temperature adjustment device can select the corresponding electronic water pump basic speed M3 from the test data according to the inlet and outlet water temperature difference index of the engine design. This speed should provide sufficient cooling capacity under various working conditions while avoiding unnecessary energy consumption and noise.

[0083] In cold engine start mode, the electronic water pump speed M2 is usually lower than the basic speed M3 in normal hot engine working mode. This is because when the cold engine is started, the engine temperature is low and the demand for cooling water is relatively low, so energy consumption and noise can be reduced by reducing the water pump speed.

[0084] The engine temperature adjustment device can set the threshold range of the temperature difference correction. The engine temperature adjustment device can determine that the first correction speed is 0 when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is between the second threshold and the seventh threshold, that is, no adjustment is made to the electronic water pump basic speed M3. This interval is mainly used for the opening and confirmation of the electronic thermostat. If the electronic thermostat is not turned on, the engine water temperature cannot be effectively reduced. At this time, increasing the speed of the electronic water pump will cause unnecessary power consumption. Therefore, the speed of the electronic water pump is kept stable within this interval, and further regulation is performed after the electronic thermostat works normally.

[0085] The engine temperature adjustment device can be used when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than the second threshold value, that is, the actual engine water temperature is lower than the target water temperature. At this time, the engine temperature adjustment device can perform 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. Thereby slowing down the speed of the engine water temperature drop, so that the actual water temperature can approach and reach the target water temperature more quickly, avoiding overcooling in the cold state.

[0086] The engine temperature adjustment device can be used when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than or equal to the seventh threshold value, that is, the engine water temperature is too high or the cooling system efficiency is insufficient. At this time, the engine temperature adjustment device can perform a positive correction mechanism on M3, that is, M2 is set to a value greater than 0, so as to gradually increase the operating speed of the electronic water pump. By increasing the cooling water flow rate and improving the cooling efficiency, the engine water temperature is effectively reduced to prevent overheating.

[0087] The engine temperature adjustment device may be set to a value less than 0 for M5 to maintain the balance and efficiency of the cooling system when the vehicle is in a high-speed driving state, so as to reduce the speed of the electronic water pump, and then reduce the coolant flow through the radiator, thereby appropriately weakening the heat exchange capacity of the cooling system to avoid increased energy consumption and potential thermal stress problems caused by overcooling. Alternatively, the engine temperature adjustment device may be set to a value greater than 0 for M5 to increase the speed of the electronic water pump, increase the working rate of the water pump, and increase the circulation volume of the coolant in the radiator when the vehicle is in a low-speed driving state, so as to enhance the heat exchange efficiency of the cooling system, ensure that the engine can operate stably within an appropriate temperature range, and prevent overheating.

[0088] The engine temperature adjustment device may set M5 to a value less than 0 in a low temperature environment to reduce the speed of the electronic water pump. The engine temperature adjustment device may set M5 to a value greater than 0 in a high temperature environment to increase the speed of the electronic water pump.

[0089] In a possible manner, when the working mode of the cooling system is the heating mode, the adjustment strategy may include: determining the electronic water pump speed M7 based on the engine cylinder head outlet water temperature and the HVAC flow request signal.

[0090] Specifically, when the heating mode is activated, the speed of the electronic water pump M7 will be increased step by step according to the flow rate required for heating. This dynamic adjustment mechanism ensures that the appropriate coolant flow rate can be provided under different heating requirements to meet the immediate and efficient heating needs of the entire vehicle.

[0091] Furthermore, under the same flow request boundary conditions, if the engine cylinder head outlet water temperature exceeds the preset temperature, it indicates that the engine has reached a relatively high thermal equilibrium state, and the liquid-air temperature difference in the heater core increases, and the heat exchange efficiency is significantly improved. In this situation, in order to optimize energy consumption and efficiency, the electronic water pump speed M7 can be appropriately reduced.

[0092] In one possible manner, when the working mode of the cooling system is the EGR cooling mode, the adjustment strategy may include: the engine temperature adjustment device may determine the electronic water pump speed M8 based on the EGR gas flow and the EGR outlet temperature.

[0093] Specifically, the engine temperature adjustment device can gradually increase the electronic water pump speed M8 based on the increase of the EGR outlet temperature to ensure that the EGR outlet temperature does not exceed the EGR valve temperature limit. The engine temperature adjustment device can gradually increase the electronic water pump speed M8 based on the increase of the EGR gas flow rate to ensure that the EGR outlet temperature meets the engine performance requirements, which can effectively improve the combustion effect and enhance the fuel saving effect.

[0094] In addition, to prevent the risks that may be caused by starting the EGR cooling mode when the engine water temperature is too low, the system ensures safety by setting the enabling conditions of the EGR valve. That is, the EGR air circuit valve body will only be allowed to open when the engine water temperature is greater than or equal to the third threshold.

[0095] In one possible manner, the engine temperature adjustment device can control the cold engine start mode and the EGR cooling mode in parallel, and determine the electronic water pump speed to be max (M2, M8). The engine temperature adjustment device can control the hot engine normal operation mode, heating mode, EGR cooling mode, and knock cooling mode in parallel, and determine the electronic water pump speed to be max (M1, M6, M7, M8).

[0096] In one possible approach, when the cooling system operates in waste heat recovery mode, the adjustment strategy may include: determining the electronic water pump speed M7 (the same as the heating mode) based on the engine cylinder head water outlet temperature and the HVAC flow request signal.

[0097] Specifically, when the user's heating demand is relatively strong, the engine temperature adjustment device can activate the water-heating positive temperature coefficient heater (PTC) or air-heating PTC to slow down the trend of the engine water temperature dropping too quickly due to the warm air system, ensure that the engine works in an appropriate temperature range, and meet the demand for rapid temperature rise in the car.

[0098] Alternatively, when the user's heating demand is not high, usually only the heater core is used for natural heat dissipation. The engine temperature adjustment device can be used to heat the water temperature with water heating PTC, or use wind heating PTC for low-power blowing to improve the heating effect.

[0099] In one possible manner, when the operating mode of the cooling system is the post-shutdown operation mode, the adjustment strategy may include: the engine temperature adjustment device may determine the electronic water pump speed M9 and the post-operation time t based on the engine cylinder head water outlet temperature signal, and when the time threshold is reached during the post-operation time t or the engine cylinder head water outlet temperature is less than or equal to the sixth threshold, exit the post-shutdown operation mode and stop operating.

[0100] Specifically, when the working mode of the cooling system is the post-shutdown operation mode, the engine temperature adjustment device can determine the electronic water pump speed M9 according to the engine cylinder head outlet water temperature, and maintain a certain coolant circulation, while recording the operation time t. If the operation time t reaches the time threshold, or the sixth threshold of the engine cylinder head outlet water temperature, the electronic water pump will automatically stop working and exit the post-operation mode.

[0101] In addition, due to the special operating conditions of the hybrid engine, that is, the vehicle may still be in motion when the engine is shut down, the operation strategy after the electronic water pump is shut down further integrates the monitoring of the vehicle speed. The engine temperature adjustment device can be in the vehicle in motion, and in order to avoid unnecessary energy consumption and noise, the electronic fan will not be requested to run. Alternatively, the engine temperature adjustment device can be in the vehicle in a stationary state. To ensure the cooling effect, the system will request the electronic fan to work with the electronic water pump. However, when the engine water temperature exceeds the fifth threshold, the system will unconditionally force the electronic fan to start and work with the electronic water pump to quickly reduce the water temperature and ensure the safe and stable operation of the engine and vehicle thermal management system.

[0102] In one possible manner, the engine temperature adjustment device may stop the operation of the electronic water pump when the engine is in a stopped state and the engine cylinder head outlet water temperature is less than a third threshold. The engine temperature adjustment device may control the waste heat recovery mode and the post-shutdown operation mode in parallel to determine the electronic water pump speed max (M7, M9) when the engine is in a stopped state and the engine cylinder head outlet water temperature is greater than or less than the third threshold.

[0103] In one possible manner, the engine temperature adjustment device can adjust the engine water temperature based on the electronic water pump speed while controlling the engine water temperature based on the electronic thermostat and the electronic fan.

[0104] Specifically, the engine temperature adjustment device can negatively correct the electronic water pump speed when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than a first calibration value, thereby reducing its speed to reduce energy consumption, and turning off the heating function of the electronic thermostat, that is, setting the PWM signal to 0, to avoid unnecessary energy consumption, and turning off the electronic fan.

[0105] Alternatively, the engine temperature adjustment device may not make a negative correction to the electronic water pump speed when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than the first calibration value and less than the second calibration value, thereby ensuring a basic cooling cycle, and adjusting the electronic thermostat based on the PID control algorithm to gradually increase the duty cycle of the electronic thermostat according to the increase in engine water temperature, replenish heat or fine-tune the cooling effect in a timely manner, and continue to keep the electronic fan in the shutdown state.

[0106] Alternatively, the engine temperature adjustment device can make a positive correction to the electronic water pump when the temperature difference between the engine cylinder head water outlet 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 increase in engine water temperature, replenish heat or fine-tune the cooling effect in a timely manner, and do not start the electronic fan.

[0107] In addition, the engine temperature adjustment device can make a positive correction to the electronic water pump and adjust the PWM signal of the electronic thermostat to the maximum when the temperature difference between the water outlet temperature of the engine cylinder head and the engine target temperature is greater than a third calibration value, and intelligently select a low-speed, medium-speed or high-speed operating mode according to the temperature difference between the water outlet temperature of the engine cylinder head and the engine target temperature, thereby ensuring that the engine is cooled in a timely and effective manner and preventing overheating damage.

[0108] based on Figure 1 The technical solution in this application can ensure that the engine can be maintained within a suitable temperature range under various working conditions by real-time monitoring of vehicle operating parameters and adjusting the working mode of the cooling system, avoiding performance degradation or damage caused by overheating, and controlling multiple working modes of the cooling system more flexibly, with faster response speed, more precise control of the engine water temperature, and smaller water temperature fluctuations. Therefore, this application can effectively maintain the temperature of the engine in a suitable working temperature range.

[0109] In some embodiments, Figure 2 As shown, it is a schematic diagram of a temperature adjustment process provided by the present application.

[0110] In one possible manner, the engine temperature adjustment device can obtain the vehicle operating parameters of the vehicle and determine the working mode of the cooling system based on the vehicle operating parameters. The engine temperature adjustment device can determine the basic speed and the corrected speed of the electronic water pump according to the working mode of the cooling system and the vehicle operating parameters. The engine temperature adjustment device can control the opening of the electronic thermostat and the opening of the electronic fan based on the vehicle operating parameters.

[0111] In some embodiments, Figure 3 The figure shows a schematic diagram of the classification of working modes of a cooling system provided in the present application.

[0112] In one possible way, when the engine is in operation, the working modes of the cooling system include: cold engine start mode, hot engine normal operation mode, heating mode, EGR cooling mode, and knock cooling mode. When the engine is in shutdown state, the working modes of the cooling system include: post-shutdown operation mode and waste heat recovery mode.

[0113] In some embodiments, Figure 4 Shown is a schematic diagram of an electronic water pump speed determination process provided by the present application.

[0114] In one possible manner, the engine temperature adjustment device may stop the operation of the electronic water pump when the engine is in a stopped state and the water outlet temperature of the engine cylinder head is less than a third threshold value.

[0115] In one possible manner, the engine temperature adjustment device can determine the waste heat recovery mode as the operating mode of the cooling system when the engine is in a stopped state, the engine cylinder head water outlet temperature is greater than or equal to the third threshold, the engine cylinder head water outlet 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 water outlet temperature and the heating demand flow.

[0116] In one possible manner, the engine temperature adjustment device can stop running the electronic water pump when the engine is in a stopped state, the engine cylinder head water outlet temperature is greater than or equal to a third threshold, the engine cylinder head water outlet temperature is less than a fifth threshold, and the heating demand flow is zero.

[0117] In one possible manner, the engine temperature adjustment device can determine the post-shutdown operation mode as the cooling system's operating mode when the engine is in a shutdown state, the engine cylinder head water outlet temperature is greater than or equal to the fifth threshold, and the engine cylinder head water outlet temperature is less than the sixth threshold, and calculate the electronic water pump speed and operating time t based on the engine cylinder head water outlet temperature, and calculate the operating time of the electronic fan based on the engine cylinder head water outlet temperature and vehicle speed, and stop the electronic water pump when the engine cylinder head water outlet temperature is not less than the sixth threshold.

[0118] In some embodiments, Figure 5 As shown, it is a schematic diagram of another electronic water pump speed determination process provided by the present application.

[0119] In one possible manner, the engine temperature adjustment device can determine the knock cooling mode as the working mode of the cooling system and determine the electronic water pump speed M1 as the maximum speed when the engine is in the running state and the average deignition angle of the engine is greater than or equal to the first threshold.

[0120] In one possible manner, the engine temperature adjustment device can determine the cold engine start mode as the working mode of the cooling system when the engine state is in the running state, the average de-ignition angle of the engine is less than the first threshold value, and the first temperature difference is less than the second threshold value, and determine the electronic water pump speed M2 based on the engine cylinder head outlet water temperature and the 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 target temperature.

[0121] In one possible manner, the engine temperature adjustment device can determine the heating mode as the working mode of the cooling system when the engine is in an operating state, the average de-ignition angle of the engine is less than a first threshold, the engine cylinder head water outlet temperature is greater than or equal to a third threshold, and the heating demand flow is not zero, and determine the electronic water pump speed M7 based on the engine cylinder head water outlet temperature and the heating demand flow.

[0122] In one possible manner, the engine temperature adjustment device can determine the EGR cooling mode as the operating mode of the cooling system when the water outlet temperature of the engine cylinder head 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, and determine the electronic water pump speed M8 based on the EGR outlet temperature and the EGR gas flow.

[0123] In one possible manner, the engine temperature adjustment device can determine the normal working mode of the heat engine as the working mode of the cooling system when the engine state is in the running state, the average de-ignition angle of the engine is less than the first threshold, the first temperature difference is less than the second threshold, the engine cylinder head outlet water temperature is less than the third threshold, the heating demand flow is zero, and the EGR outlet temperature is less than the fourth threshold. The engine temperature adjustment device can determine the basic speed of the electronic water pump based on the engine speed and the engine load, and determine the first corrected speed based on the first temperature difference and the engine power, and determine the second corrected speed based on the vehicle speed and the ambient temperature. The engine temperature adjustment device can determine the sum of the basic speed of the electronic water pump, the first corrected speed, and the second corrected speed as the electronic water pump speed M6.

[0124] In one possible manner, the engine temperature adjustment device can perform parallel control on the normal operation mode of the heat engine, the heating mode, and the EGR cooling mode, and determine the speed of the electronic water pump to be max (M6, M7, M8).

[0125] In some embodiments, Figure 6 As shown, it is a schematic diagram of a normal working mode adjustment strategy of a heat engine provided in the present application.

[0126] In one possible manner, when the cooling system operates in the normal operating mode of the thermal engine, the engine temperature adjustment device can, when the first temperature difference is less than the first calibration value, adjust the strategy including: negative correction of the electronic water pump speed, 0% duty cycle of the electronic thermostat, and turning off the electronic fan.

[0127] In one possible manner, 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, and the adjustment strategy includes: the electronic water pump speed adopts a basic speed, the electronic thermostat duty cycle adopts PID adjustment, and the electronic fan is turned off.

[0128] In one possible manner, the engine temperature adjustment device may be such that when the second temperature difference is greater than or equal to the third calibration value and less than the third calibration value, the adjustment strategy includes: the electronic water pump speed is corrected positively, the electronic thermostat duty cycle is adjusted using PID, and the electronic fan is turned off. Otherwise, the adjustment strategy includes: the electronic water pump speed is corrected positively, the electronic thermostat continues to use the maximum PWM, the electronic fan is turned on and the electronic fan gear is determined according to the first temperature difference.

[0129] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of method. In order to achieve the above functions, the engine temperature adjustment device or electronic device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0130] The embodiment of the present application can divide the functional modules of the engine temperature adjustment device or electronic device according to the above method. For example, the engine temperature adjustment device or electronic device can include various functional modules corresponding to the various functional divisions, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. There may be other division methods in actual implementation.

[0131] Figure 7 is a block diagram of a device for adjusting engine temperature according to an exemplary embodiment. Figure 7 The engine temperature adjustment device 700 includes: an acquisition unit 201, a determination unit 202, and an adjustment unit 203.

[0132] In a possible manner, the acquisition unit 201 is used to acquire vehicle operating parameters of the vehicle.

[0133] In one possible manner, the determination unit 202 is used to determine an operating mode of the cooling system that matches the vehicle operating parameters.

[0134] In a possible manner, the adjustment unit 203 is configured to adjust the temperature of the engine through the cooling system based on an adjustment strategy corresponding to the working mode.

[0135] In one possible manner, the determination unit 202 is specifically configured to: determine a first operating mode according to vehicle operating parameters when the engine state is in an operating state and the average de-ignition angle of the engine is less than a first threshold; the first operating mode includes: a cold engine start mode, a hot engine normal operating mode, a heating mode, and an EGR cooling mode;

[0136] In one possible manner, the determination unit 202 is specifically used to: when the engine state is in an operating state and the average de-ignition angle of the engine is less than a first threshold, determine the first operating mode according to the vehicle operating parameters; the first operating mode includes: cold engine start mode, hot engine normal operating mode, heating mode, EGR cooling mode; when the engine state is in an operating state and the average de-ignition angle of the engine is greater than or equal to the first threshold, determine the knock cooling mode as the operating mode of the cooling system.

[0137] In one possible manner, the determination unit 202 is specifically used to: determine the cold engine 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 the second threshold; determine the normal working mode of the heat engine 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 the second threshold, the engine cylinder head outlet water temperature is less than the third threshold, the heating demand flow is zero, and the EGR outlet temperature is less than the 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, determine the heating 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 temperature is greater than or equal to the fourth threshold, determine the EGR cooling mode as the working mode of the cooling system.

[0138] In a possible manner, the determination unit 202 is specifically used to: when the engine is in a shutdown state, determine the operating mode of the cooling system that matches the water outlet temperature of the engine cylinder head.

[0139] In one possible manner, the determination unit 202 is specifically used to: when the water outlet temperature of the engine cylinder head is greater than or equal to the fifth threshold, determine the post-shutdown operation mode as the working mode of the cooling system; when the water outlet temperature of the engine cylinder head is greater than or equal to the third threshold and the heating demand flow is not zero, determine the waste heat recovery mode as the working mode of the cooling system.

[0140] In a possible manner, the determination unit 202 is further configured to exit the post-shutdown operation mode when the engine cylinder head outlet water temperature is less than a sixth threshold value.

[0141] In one possible manner, 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 electronic water pump to the target speed, and adjust the duty cycle of the electronic thermostat to the target duty cycle, and adjust the gear of the electronic fan to the target gear.

[0142] In one possible manner, the adjustment unit 203 is specifically used to: when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than a first calibration value, determine that the target speed is less than the current speed, the target duty cycle is zero, and the target gear is the closed gear; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than or equal to the first calibration value, and less than the second calibration value, determine that the target speed is the current speed, the target duty cycle is PID adjustment, and the target gear is the closed gear; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than or equal to the second calibration value, and less than the third calibration value, determine that the target speed is greater than the current speed, the target duty cycle is PID adjustment, and the target gear is the closed gear; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than the third calibration value, determine that the target speed is greater than the current speed, the target duty cycle is the maximum value, and the target gear is the open gear.

[0143] In one possible manner, the adjustment unit 203 is specifically used to: determine the operation time of the electronic water pump based on the water outlet temperature of the engine cylinder head; determine the operation time of the electronic fan based on the vehicle speed and the water outlet temperature of the engine cylinder head.

[0144] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0145] Figure 8 FIG. 1 is a block diagram of an electronic device according to an exemplary embodiment. Figure 8 As shown, the electronic device includes but is not limited to: a processor 301 and a memory 302 .

[0146] The memory 302 is used to store executable instructions of the processor 301. It can be understood that the processor 301 is configured to execute instructions to implement the engine temperature adjustment method in the above embodiment.

[0147] It should be noted that those skilled in the art can understand that Figure 8 The electronic device structure shown in the figure does not constitute a limitation on the electronic device, and the electronic device may include Figure 8 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0148] The processor 301 is the control center of the electronic device. It uses various interfaces and lines to connect various parts of the entire electronic device. By running or executing software programs and / or modules stored in the memory 302, and calling data stored in the memory 302, it performs various functions of the electronic device and processes data, thereby monitoring the electronic device as a whole. The processor 301 may include one or more processing units. Optionally, the processor 301 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 301.

[0149] The memory 302 can be used to store software programs and various data. The memory 302 can mainly include a program storage area and a data storage area, wherein the program storage area can store an operating system, an application program required by at least one functional module (such as a determination unit, a processing unit, etc.), etc. In addition, the memory 302 can include a high-speed random access memory, and can also include a non-volatile memory, such as at least one disk storage device, a flash memory device, or other volatile solid-state storage devices.

[0150] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 302 including instructions. The above instructions can be executed by a processor 301 of an electronic device to implement the method in the above embodiment.

[0151] In actual implementation, Figure 7 The functions of the acquisition unit 201, the determination unit 202, and the adjustment unit 203 in Figure 8 The processor 301 in the embodiment calls the computer program stored in the memory 302. The specific execution process can refer to the description of the method part in the above embodiment, which will not be repeated here.

[0152] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

[0153] In an exemplary embodiment, the present application also provides a computer program product including one or more instructions, and the one or more instructions can be executed by the processor 301 of the electronic device to complete the method in the above embodiment.

[0154] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the electronic device, the various processes of the above-mentioned method embodiment are implemented, and the same technical effect as the above-mentioned method can be achieved. To avoid repetition, they will not be repeated here.

[0155] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned 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.

[0156] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of modules or units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0157] The units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0158] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0159] If the integrated unit is implemented in the form of 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 embodiment of the present application is essentially or the part that contributes to the prior art or the full classification part or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor (processor) to execute the full classification part or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, disk or CD and other media that can store program code.

[0160] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto, and any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

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

2. The method according to claim 1, characterized in that The working modes of the cooling system include at least one of the following: cold engine start mode, hot engine normal working mode, heating mode, exhaust gas recirculation system EGR cooling mode, knock cooling mode, post-shutdown operation mode, and waste heat recovery mode.

3. The method according to claim 2, characterized in that The vehicle operating parameters include an average de-ignition angle of the engine, and determining the operating mode of the cooling system matching the vehicle operating parameters includes: When the engine state is in the running state and the average de-ignition angle of the engine is less than a first threshold value, the working mode of the cooling system is determined as a first working mode according to the vehicle operating parameters; the first working mode includes: the cold engine starting mode, the hot engine normal working mode, the heating mode, and the EGR cooling mode; When the engine state is a running state and the average de-ignition angle of the engine is greater than or equal to a first threshold, the working 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 water outlet temperature, engine target temperature, heating demand flow, EGR outlet temperature; according to the vehicle operating parameters, determining the working mode of the cooling system as the first working 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 operating mode of the cooling system to be the cold engine start mode; When the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than a second threshold, the engine cylinder head water outlet 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 operating mode of the cooling system is determined to be the normal operating mode of the heat engine; When the water outlet temperature of the engine cylinder head is greater than or equal to a third threshold value and the heating demand flow rate is not zero, determining the working mode of the cooling system to be the heating mode; When the engine cylinder head water outlet temperature is less than a third threshold value and / or the heating demand flow is zero and the EGR gas outlet temperature is greater than or equal to a fourth threshold value, 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 determining of the operating mode of the cooling system matching the vehicle operating parameters comprises: When the engine is in a shutdown state, an operating mode of the cooling system that matches the water outlet temperature of the engine cylinder head is determined.

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

7. The method according to claim 6, characterized in that The method further comprises: When the water outlet temperature of the engine cylinder head is less than the sixth threshold, the post-shutdown operation mode is exited.

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 adjusting strategy corresponding to the working mode, adjusting the state of one or more temperature control devices in the cooling system, includes: Determining a target speed, a target duty cycle, and a target gear position based on an adjustment strategy corresponding to the working mode and the vehicle operating parameters; The rotation speed of the electronic water pump is adjusted to the target rotation speed, the duty cycle of the electronic thermostat is adjusted to the target duty cycle, and the gear position of the electronic fan is adjusted to the target gear position.

9. The method according to claim 8, characterized in that In the case where the working mode is a normal working mode of a thermal engine, determining a target speed, a target duty cycle and a target gear position based on an adjustment strategy corresponding to the working mode and the vehicle operating parameters includes: When the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is less than a first calibration value, determining that the target speed is less than the current speed, the target duty cycle is zero, and the target gear is a closed gear; When 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, determining that the target speed is the current speed, the target duty cycle is PID adjustment, and the target gear is the closed gear; When the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than or equal to the second calibration value and less than the third calibration value, it is determined that the target speed is greater than the current speed, the target duty cycle is PID adjustment, and the target gear is the closed gear; when the temperature difference between the engine cylinder head water outlet temperature and the engine target temperature is greater than the third calibration value, it is determined that the target speed is greater than the current speed, the target duty cycle is the maximum value, and the target gear is the open gear.

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

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

12. A vehicle, characterized in that: The vehicle comprises the device of claim 11.

13. An electronic device, characterized in that: include: processor; a memory for storing instructions executable by the processor; The processor is configured to execute the instructions to implement the method according to 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 a processor of an electronic device, the electronic device can perform the method as claimed in any one of claims 1 to 10.

15. A computer program product comprising instructions, characterized in that When the instructions are executed by a computer, the computer is caused to perform the method according to any one of claims 1 to 10.

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