Control method, system and equipment for electrically-controlled silicone oil fan of engine and medium

Abstract

The invention provides a control method, system, equipment and medium for an electric control silicone oil fan of an engine, and belongs to the technical field of engine fan control. The method comprises the steps that the current vehicle speed, the accelerator pedal opening degree and the engine rotating speed of a vehicle are obtained, and whether the vehicle is in a gear sliding working condition or not is judged; the current water temperature of the engine is obtained, and whether the engine is in a low-temperature state or not is judged according to the current water temperature of the engine and a preset water temperature threshold value; and when the vehicle is in the gear sliding working condition and the engine is not in the low-temperature state, the target rotating speed of an electric control silicone oil fan for cooling the engine is increased. The characteristic that the engine is reversely dragged and does not spray oil under the working condition of vehicle sliding with gears is utilized, the rotating speed of the electric control silicon oil fan is increased, additional cooling of the engine heat management system is achieved, and when the vehicle exits from the working condition of vehicle sliding with gears and the engine does positive work, the engine heat management system is in a relatively low-temperature state, and the engine heat management system is in a low-temperature state. The positive work consumption of the fan to the engine is reduced, so that the oil consumption of the whole vehicle is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of engine fan control, and in particular relates to a control method, system, equipment and medium for an engine electronically controlled silicone oil fan. Background Art

[0002] At present, traditional energy heavy trucks mainly use electronically controlled silicone oil fans to cool the engine thermal management system. Electronically controlled silicone oil fans control the temperature of the engine coolant by adjusting the fan speed, thereby ensuring that the engine operates in an efficient and safe state. However, in order to ensure that the engine can still maintain a warm operating temperature under extreme working conditions, such as long-term climbing, heavy-load driving in high temperature environments, etc., and meet the extreme thermal management requirements, large-diameter engine fans are often used.

[0003] However, this large-diameter engine fan has the following problems in actual operation: Due to its large size, it consumes extremely high power during operation, becoming the accessory with the highest power consumption when the vehicle is running. High power consumption means that the engine needs to output more energy to drive the fan, resulting in a significant increase in the fuel consumption of the entire vehicle. Taking long-distance heavy trucks as an example, fuel costs account for a considerable proportion of their operating costs, and the excessive power consumption of the engine fan makes fuel economy worse, greatly increases operating costs, and thus reduces the competitiveness of the product in the market. In addition, the existing engine electronically controlled silicone oil fan control strategy is relatively simple, and most of them only adjust the fan speed based on a single parameter of engine water temperature. This control method cannot fully consider the actual driving conditions of the vehicle.

[0004] How to reduce the power consumption of the engine fan and optimize the fan control strategy while ensuring the engine thermal management performance has become an urgent problem to be solved in current automobile development. Summary of the invention

[0005] In a first aspect, an embodiment of the present application provides a method for controlling an electronically controlled silicone oil fan of an engine, comprising the following steps: S1. Obtain the current vehicle speed, accelerator pedal opening, and engine speed, and determine whether the vehicle is in a coasting condition according to the current vehicle speed, accelerator pedal opening, and engine speed; S2. Obtain the current water temperature of the engine, and determine whether the engine is in a low temperature state based on the current water temperature of the engine and a preset water temperature threshold; S3. When the vehicle is in a gear-engaged coasting condition and the engine is not in a low-temperature state, increase the target speed of the electronically controlled silicone oil fan for cooling the engine.

[0006] Furthermore, the specific steps of step S1 are as follows: S11. Obtain the current vehicle speed, accelerator pedal opening, and engine speed; S12. Determine whether the vehicle is in a coasting condition with gear according to whether the current vehicle speed is 0, whether the current accelerator pedal opening is 0, and whether the current engine speed is higher than the set threshold. The combination of vehicle speed, accelerator pedal opening and engine speed clearly divides different working conditions to avoid misjudgment; Adapts to complex working conditions: can effectively distinguish between idling, neutral coasting and coasting with gear, ensuring the correct execution of control strategies; Furthermore, the specific steps of step S12 are as follows: S121. Determine whether the current speed of the vehicle is 0; If so, it is determined that the vehicle is currently stationary, and the process ends; If not, it is determined that the vehicle is currently in motion; S122. Determine whether the current accelerator pedal opening of the vehicle is 0; If not, it is determined that the engine of the current vehicle responds to the fuel injection command of the accelerator pedal, and the engine actively injects fuel to perform work, and the process ends; If yes, it is determined that the engine of the current vehicle has not received the fuel injection command from the accelerator pedal, and the engine has not actively injected fuel to perform work; S123. Determine whether the current engine speed of the vehicle is higher than a set threshold; If not, it is determined whether the current vehicle engine is in a neutral coasting state to maintain the driving idle speed, and the passive injection is done, and the end is completed; If so, the vehicle is determined to be in a gear-engaged coasting condition. By judging the vehicle speed, accelerator pedal opening and engine speed step by step, the operating range is gradually narrowed to ensure the accuracy of the judgment result; it can effectively identify whether the engine is actively injecting fuel or passively injecting fuel, avoiding driving the fan when additional cooling is not required, thereby reducing unnecessary energy consumption.

[0007] Furthermore, the specific steps of step S2 are as follows: S21. Preset the engine water temperature threshold; S22. Obtain the current water temperature of the engine and compare it with the water temperature threshold; If the current water temperature of the engine is higher than or equal to the water temperature threshold, proceed to step S23; If the current water temperature of the engine is lower than the water temperature threshold, proceed to step S24; S23. Determine that the engine is not in a low temperature state; S24. The engine is judged to be in a low temperature state, and the engine has increased fuel consumption due to increased friction, and the process ends. By judging whether the engine is in a low temperature state, the preset water temperature threshold is compared with the current water temperature, and then the engine state is judged according to the result, the engine is ensured to run under appropriate temperature conditions to avoid engine performance degradation and increased fuel consumption due to too low temperature.

[0008] Further, the specific steps of step S21 are as follows: S211. Set test conditions according to ambient temperature, engine load and driving conditions; S212. Test the vehicle under different test conditions and collect the fuel consumption data of the engine at different water temperatures; S213. Analyze the collected data, draw the engine fuel consumption-water temperature curve, and identify the water temperature turning point where the fuel consumption rises beyond the set rate; S214. Combine the engine fuel consumption change and set the preliminary water temperature threshold according to the water temperature turning point; S215. Test and verify the preliminary water temperature threshold in actual application, and fine-tune and optimize the preliminary water temperature threshold according to the fuel consumption data of the vehicle during the test and verification process to obtain the final water temperature threshold. By setting different test conditions, collecting fuel consumption data, analyzing data, and testing and verifying and fine-tuning and optimizing the engine water temperature threshold in combination with actual application, the rationality of the determined water temperature threshold is ensured, and the relationship between engine thermal management and fuel consumption can be accurately balanced, thereby improving the overall performance and fuel economy of the engine.

[0009] Furthermore, the specific steps of step S3 are as follows: S31. When the vehicle is coasting with gear engaged and the engine is not in a low temperature state, it is determined that the engine is being dragged and fuel is not being injected, and the engine thermal management system has an additional cooling requirement; S32. Obtain the current control strategy of the electronically controlled silicone oil fan and parse out the target speed required by the fan; S33. Obtaining a preset fan speed correction value, and superimposing the fan speed correction value with the target speed required by the fan to obtain a corrected target speed; S34. Returning the corrected target speed to the current control strategy of the electronically controlled silicone oil fan for execution; S35. According to step S1, it is determined whether the vehicle is still in the coasting condition with the gear, and according to step S2, it is determined whether the engine is still not in a low temperature state; If both conditions are still met, return to step S34; If at least one of the two conditions is no longer satisfied, proceed to step S36; S36. Take out the superimposed fan speed correction value from the corrected target speed, obtain the original target speed and return it to the current control strategy of the electronically controlled silicone oil fan for execution, and return to step S1. The steps of determining the additional cooling demand, obtaining and analyzing the target speed, superimposing the correction value, executing the corrected speed, and dynamically adjusting according to the working condition change increase the fan target speed to realize the fan speed adjustment process and realize the optimized control of the engine thermal management system.

[0010] Furthermore, in step S33, the fan speed correction value is obtained by the following steps: SS1. Set test conditions according to vehicle speed range and road slope, set monitoring points in the engine thermal management system, and collect temperature values ​​of the monitoring points through temperature sensors; SS2. Start the test under different test conditions and collect the temperature data values ​​of the monitoring points; SS3. Based on the temperature data values ​​collected under different test conditions, determine the fan speed increase range corresponding to the engine water temperature being reduced to the low temperature threshold under different gear-shifting coasting conditions and the coasting speed reduction being less than the speed fluctuation threshold, and select a preliminary fan speed correction value; SS4. Test the preliminary fan speed correction value in actual application. During the test, collect the temperature value of the monitoring point, the fuel consumption of the engine and the operating status of the engine, and fine-tune the preliminary fan speed correction value based on the collected data to obtain the optimal fan speed correction value. By setting the test conditions, collecting temperature data, determining the range of fan speed increase, and conducting actual application tests and fine-tuning, the optimal fan speed correction value can be obtained to ensure that while meeting the cooling requirements of the engine thermal management system, the additional consumption of engine power is minimized, further improving the energy efficiency and economy of the vehicle.

[0011] In a second aspect, the embodiment of the present application further provides a control system for an engine electronically controlled silicone oil fan, comprising: The vehicle coasting condition recognition module is used to obtain the vehicle's current speed, accelerator pedal opening and engine speed to determine whether the vehicle is in the coasting condition; The engine low temperature state recognition module is used to obtain the current water temperature of the engine and determine whether the engine is in a low temperature state; The fan target speed processing module increases the target speed of the electronically controlled silicone oil fan that cools the engine when the vehicle is in a gear-engaged coasting condition and the engine is not in a low-temperature state. By setting up a vehicle gear-engaged coasting condition recognition module, an engine low-temperature state recognition module, and a fan target speed processing module, real-time monitoring and precise control of the vehicle operating condition and engine status are achieved.

[0012] In a third aspect, an embodiment of the present application further provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method for controlling the engine electronically controlled silicone oil fan as described in the first aspect are implemented.

[0013] In a fourth aspect, an embodiment of the present application further provides a storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method for controlling the electronically controlled silicone oil fan of the engine as described in the first aspect are implemented.

[0014] It can be seen from the above technical solutions that the present invention has the following advantages: The control method, system, device and medium of the engine electronically controlled silicone oil fan provided in the present application utilizes the characteristic that the engine is dragged in reverse and does not spray oil when the vehicle is in gear and coasting condition, and increases the speed of the electronically controlled silicone oil fan to achieve additional cooling of the engine thermal management system. When the vehicle exits the gear-engaged coasting condition and the engine is doing positive work, the engine thermal management system is in a relatively low temperature state, and the demand for the fan is relatively lower, reducing the fan's consumption of the engine's positive work, thereby reducing the vehicle's fuel consumption. The present application realizes precise automatic control of the engine's electronically controlled silicone oil fan by comprehensively considering the vehicle's operating conditions and the engine's state, reduces unnecessary power consumption, and improves fuel economy and engine performance; at the same time, by optimizing the fan speed adjustment strategy, it further meets the engine's thermal management needs, protects the engine and extends its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0016] Figure 1 The present invention is a flow chart of a method for controlling an electronically controlled silicone oil fan of an engine.

[0017] Figure 2 It is a schematic diagram of a control system of an engine electronically controlled silicone oil fan according to the present invention. DETAILED DESCRIPTION

[0018] In the specific steps of the control method of the engine electronically controlled silicone oil fan, which will be described in detail below, various embodiments of the present disclosure will be described more fully. The present disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but rather the present disclosure should be understood to cover all adjustments, equivalents and / or alternatives that fall within the spirit and scope of the various embodiments of the present disclosure.

[0019] For example, currently, traditional energy heavy trucks rely on an electronically controlled silicone oil fan system to maintain the effectiveness of engine thermal management. The system regulates the coolant temperature by adjusting the rotation speed of the fan to ensure that the engine can operate efficiently and safely. However, in order to meet the thermal management needs of vehicles under extreme operating conditions, such as long-term climbing or heavy-load operation in high temperature environments, these vehicles are usually equipped with large-sized engine fans.

[0020] However, this large-sized fan has brought significant problems in practical applications: its huge size leads to extremely high power consumption during operation, making it one of the components with the highest power consumption in vehicle operation. High power consumption means that the engine needs to provide more energy to drive the fan, which greatly increases fuel consumption. For heavy-duty trucks for long-distance transportation, fuel costs occupy an important position in operating costs. The high power consumption of the fan leads to reduced fuel economy, significantly increases operating costs, and weakens the market competitiveness of the product. In addition, the existing electronically controlled silicone oil fan control strategy is relatively basic, and most of them only adjust the fan speed based on a single indicator, the engine water temperature. This control method fails to fully consider the actual operating conditions of the vehicle.

[0021] Therefore, how to effectively reduce the power consumption of the engine fan and optimize its control strategy while ensuring the engine thermal management efficiency has become a key issue that the current automotive industry needs to overcome urgently.

[0022] In response to the above problems, the present embodiment provides a control method for an engine electronically controlled silicone oil fan. By comprehensively judging the vehicle's coasting condition with gear engaged and the engine water temperature state, the fan speed is adjusted in a targeted manner, and the characteristic that the engine does not spray fuel when the vehicle is coasting with gear engaged is effectively utilized, so as to optimize the engine thermal management system, reduce the fuel consumption of the whole vehicle, improve energy utilization efficiency, and be easy to implement and apply in actual vehicles.

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] See also Figure 1 The figure is a flow chart of a control method of an engine electronically controlled silicone oil fan in a specific embodiment, the method comprising the following steps: S1. Obtain the current vehicle speed, accelerator pedal opening, and engine speed, and determine whether the vehicle is in a coasting condition according to the current vehicle speed, accelerator pedal opening, and engine speed; It should be noted that by comprehensively considering the vehicle speed, accelerator pedal opening and engine speed, it is possible to accurately determine whether the vehicle is in a gear-engaged coasting condition to avoid misjudgment; this solution that does not rely on the gear information of the transmission is suitable for manual transmission models that cannot read the gear information, which improves the versatility and applicability of the system; S2. Obtain the current water temperature of the engine, and determine whether the engine is in a low temperature state based on the current water temperature of the engine and a preset water temperature threshold; It should be noted that the preset water temperature threshold is used to determine whether the engine is in a low temperature state, thereby avoiding increased fuel consumption due to low temperature operation of the engine; the control strategy is dynamically adjusted according to the actual water temperature of the engine to ensure that the engine always runs within the optimal temperature range; S3. When the vehicle is in a coasting condition with gear engaged and the engine is not in a low temperature state, the target speed of the electrically controlled silicone oil fan for cooling the engine is increased; It should be noted that when the vehicle is coasting with gear engaged, the fan speed is increased and the vehicle's kinetic energy is used to reverse-drag the fan for additional cooling, which does not consume engine power and thus reduces fuel consumption. The fan speed is dynamically adjusted according to the operating conditions to ensure additional cooling when needed and reduce unnecessary energy consumption when not needed.

[0025] This embodiment accurately identifies the coasting condition with gear engaged and the low temperature state of the engine, and intelligently adjusts the speed of the electronically controlled silicone oil fan, thereby achieving effective cooling of the engine without increasing additional energy consumption. This not only reduces the fuel consumption of the vehicle, improves the economy of the vehicle, but also optimizes the thermal management performance of the engine.

[0026] Further, as a refinement and expansion of the specific implementation of the above embodiment, in order to fully illustrate the specific implementation process in this embodiment, another control method of an engine electronically controlled silicone oil fan is provided, and the method includes the following steps: S1. Obtain the current vehicle speed, accelerator pedal opening and engine speed, and determine whether the vehicle is in a coasting condition with gear according to the current vehicle speed, accelerator pedal opening and engine speed; the specific steps of step S1 are as follows: S11. Obtain the current vehicle speed, accelerator pedal opening, and engine speed; S12. Determine whether the vehicle is in a coasting condition with gear according to whether the current vehicle speed is 0, whether the current accelerator pedal opening is 0, and whether the current engine speed is higher than a set threshold; It should be noted that by obtaining the current vehicle speed, accelerator pedal opening and engine speed to determine whether the vehicle is in a gear-engaged coasting condition, the vehicle's gear-engaged coasting condition can be accurately identified, providing a prerequisite for subsequent fan speed adjustment using the characteristic of the engine not injecting fuel under this condition; it can effectively distinguish between multiple working conditions such as stationary, engine active fuel injection, neutral coasting idling fuel injection, etc., expanding the scope of application of this control method, especially for manual transmission models where the gear position of the gearbox cannot be read; S2. Obtain the current water temperature of the engine, and determine whether the engine is in a low temperature state based on the current water temperature of the engine combined with a preset water temperature threshold; the specific steps of step S2 are as follows: S21. Preset the engine water temperature threshold; S22. Obtain the current water temperature of the engine and compare it with the water temperature threshold; If the current water temperature of the engine is higher than or equal to the water temperature threshold, proceed to step S23; If the current water temperature of the engine is lower than the water temperature threshold, proceed to step S24; S23. Determine that the engine is not in a low temperature state; S24. It is determined that the engine is in a low temperature state, and the engine has increased fuel consumption due to increased friction, and the process ends; Exemplarily, the engine water temperature threshold is set to 85°C, and when the engine water temperature is lower than 85°C, it is determined that the vehicle is in a low temperature state, and when the engine water temperature is higher than or equal to 85°C, it is determined that the vehicle is not in a low temperature state; It should be noted that if the engine water temperature is too low, the engine friction work will increase, thereby increasing fuel consumption. Therefore, the additional cooling performed by the fan in the coasting state with gear should be stopped when it is lower than a certain threshold. In this embodiment, by presetting the water temperature threshold and comparing it with the actual water temperature, it is possible to dynamically determine whether the engine is in a low temperature state; thereby avoiding the increase in engine friction and fuel consumption caused by low temperature, while reducing unnecessary fan operation and improving the economy of the system; S3. When the vehicle is in a coasting condition with gear, and the engine is not in a low temperature state, the target speed of the electronically controlled silicone oil fan for cooling the engine is increased; the specific steps of step S3 are as follows: S31. When the vehicle is coasting with gear engaged and the engine is not in a low temperature state, it is determined that the engine is being dragged and fuel is not being injected, and the engine thermal management system has an additional cooling requirement; S32. Obtain the current control strategy of the electronically controlled silicone oil fan and parse out the target speed required by the fan; S33. Obtaining a preset fan speed correction value, and superimposing the fan speed correction value with the target speed required by the fan to obtain a corrected target speed; S34. Returning the corrected target speed to the current control strategy of the electronically controlled silicone oil fan for execution; S35. According to step S1, it is determined whether the vehicle is still in the coasting condition with the gear, and according to step S2, it is determined whether the engine is still not in a low temperature state; If both conditions are still met, return to step S34; If at least one of the two conditions is no longer satisfied, proceed to step S36; S36. Take out the superimposed fan speed correction value from the corrected target speed to obtain the original target speed and return it to the current control strategy of the electronically controlled silicone oil fan for execution, and return to step S1; For example, when the vehicle is in a gear-engaged coasting state and the vehicle is not in a low-temperature state, if the above two conditions are met and logical, the original target fan speed is increased by 500r / min and used as the final output target fan speed; if any condition does not meet the judgment logic, the original target fan speed is directly used as the final output target fan speed; It should be noted that increasing the fan's current target speed means adding a fixed value to the fan target speed calculated by other control strategies, and then outputting it to the electronically controlled silicone oil fan for execution; at this time, the increased fan speed does not generate fuel consumption, but is instead achieved by the vehicle's kinetic energy being dragged back through the transmission system to the engine crankshaft, and then back-dragging the fan; in this example, the fan speed is dynamically adjusted according to the operating conditions to ensure additional cooling under gear-engaged gliding conditions, and at the same time, the speed is adjusted back to the original speed in time when exiting the operating condition; the speed is adjusted by superimposing correction values, thereby reducing unnecessary energy consumption and further reducing the vehicle's fuel consumption.

[0027] In an embodiment of the present invention, based on step S12, a possible embodiment is given below to illustrate its specific implementation scheme in a non-limiting manner.

[0028] The specific steps of step S12 are as follows: S121. Determine whether the current speed of the vehicle is 0; If so, it is determined that the vehicle is currently stationary, and the process ends; If not, it is determined that the vehicle is currently in motion; It should be noted that the vehicle's stationary state and moving state can be identified and distinguished by the condition that the vehicle speed is not zero; S122. Determine whether the current accelerator pedal opening of the vehicle is 0; If not, it is determined that the engine of the current vehicle responds to the fuel injection command of the accelerator pedal, and the engine actively injects fuel to perform work, and the process ends; If yes, it is determined that the engine of the current vehicle has not received the fuel injection command from the accelerator pedal, and the engine has not actively injected fuel to perform work; It should be noted that the condition that the accelerator pedal opening is zero can be used to distinguish whether the engine is actively injecting fuel to do work; S123. Determine whether the current engine speed of the vehicle is higher than a set threshold; If not, it is determined whether the current vehicle engine is in a neutral coasting state to maintain the driving idle speed, and the passive injection is done, and the end is completed; If so, it is determined that the current vehicle is in a coasting condition with gear engaged; For example, the threshold value of the engine speed is 700 r / min; when the current vehicle speed is not 0, the accelerator pedal opening of the vehicle is 0, and the engine speed exceeds 700 r / min, it is determined that the current vehicle is in a coasting condition with gear engaged; It should be noted that the condition that the engine speed is higher than a certain threshold can distinguish whether the engine is in a neutral coasting state and is passively injecting fuel to perform work while maintaining the vehicle's idling speed; In this example, by gradually judging the vehicle speed, the accelerator pedal opening and the engine speed, the various operating states of the vehicle can be accurately distinguished, and unreasonable adjustment of the fan speed in the engine injection state can be avoided, ensuring that the timing of fan speed adjustment is appropriate, thereby effectively reducing fuel consumption and improving the economy of vehicle operation; It should be noted that this embodiment can enable a manual transmission vehicle to still identify the coasting condition with gear even when the current gear position of the transmission cannot be read, and has a wider range of uses. Through the above-mentioned restriction conditions, it can effectively identify and distinguish the idle fuel injection of the whole vehicle in neutral coasting and the idle state of increasing the speed by pressing the cruise button when the whole vehicle is stationary. Since these two states are both states in which the engine injects fuel to do positive work, the fan should not be driven to do additional work to cause increased fuel consumption. This embodiment can accurately exclude these two conditions.

[0029] In an embodiment of the present invention, based on step S21, a possible embodiment is given below to illustrate its specific implementation scheme in a non-limiting manner.

[0030] The specific steps of step S21 are as follows: S211. Set test conditions according to ambient temperature, engine load and driving conditions; It should be noted that ambient temperature, engine load and driving conditions will affect the working state and fuel consumption performance of the engine. By setting the test conditions with comprehensive consideration of these factors, the operation of the engine in various actual scenarios can be simulated to lay a solid foundation for accurately determining the water temperature threshold, ensuring that the final threshold is applicable to various complex working conditions. S212. Test the vehicle under different test conditions and collect the fuel consumption data of the engine at different water temperatures; It should be noted that collecting data under diverse test conditions can fully reflect the relationship between water temperature and fuel consumption under different engine working conditions, avoid misjudgment of the water temperature-fuel consumption relationship due to single data, and thus improve the accuracy of subsequent determination of the water temperature threshold; S213. Analyze the collected data, draw the engine fuel consumption-water temperature curve, and identify the water temperature turning point where the fuel consumption rises beyond the set rate; It should be noted that by drawing the fuel consumption-water temperature curve, the changing trend between water temperature and fuel consumption can be intuitively displayed, which facilitates the rapid identification of key water temperature turning points; defining the increase in fuel consumption based on the set rate provides a quantitative basis for determining the water temperature threshold, making the determined water temperature threshold more reasonable, which is conducive to accurately controlling the engine thermal management system and reducing the increase in fuel consumption caused by improper water temperature; S214. Combine the engine fuel consumption change and set the preliminary water temperature threshold according to the water temperature turning point; It should be noted that the initial threshold is set based on the fuel consumption change and the water temperature turning point, taking full account of the actual fuel consumption of the engine, ensuring that the initial threshold can effectively avoid the problem of increased fuel consumption due to increased friction work when the engine water temperature is too low; S215. Testing and verifying the preliminary water temperature threshold in actual applications, and fine-tuning and optimizing the preliminary water temperature threshold according to the fuel consumption data of the vehicle during the test and verification process to obtain the final water temperature threshold; It should be noted that through actual application tests, the effectiveness of the preliminary threshold in the actual vehicle operating environment can be verified; fine-tuning and optimization can be performed based on actual fuel consumption data to further ensure that the final water temperature threshold can both meet the needs of the engine thermal management system and minimize fuel consumption.

[0031] In this embodiment, by setting different test conditions, collecting fuel consumption data, analyzing the data and combining it with actual applications for test verification and fine-tuning optimization, it is ensured that the determined water temperature threshold is reasonable, and the relationship between engine thermal management and fuel consumption can be accurately balanced to improve the overall performance and fuel economy of the engine.

[0032] In one embodiment of the present invention, the fan speed correction value in step S33 is described below in a possible embodiment to illustrate its specific implementation scheme in a non-limiting manner.

[0033] The fan speed correction value in step S33 is obtained by the following steps: SS1. Set test conditions according to vehicle speed range and road slope, set monitoring points in the engine thermal management system, and collect temperature values ​​of the monitoring points through temperature sensors; SS2. Start the test under different test conditions and collect the temperature data values ​​of the monitoring points; SS3. Based on the temperature data values ​​collected under different test conditions, determine the fan speed increase range corresponding to the engine water temperature being reduced to the low temperature threshold under different gear-shifting coasting conditions and the coasting speed reduction being less than the speed fluctuation threshold, and select a preliminary fan speed correction value; SS4. Test the preliminary fan speed correction value in actual application, collect temperature values ​​of monitoring points, engine fuel consumption and engine operating status during the test, and fine-tune the preliminary fan speed correction value based on the collected data to obtain the optimal fan speed correction value; It should be noted that by setting test conditions, collecting temperature data, determining the range of fan speed increase, and conducting actual application tests and fine-tuning, the optimal fan speed correction value can be obtained to ensure that while the engine is additionally cooled by coasting with gear engaged, the impact on the vehicle's kinetic energy loss is reduced, and the fuel consumption degradation caused by subsequent additional acceleration due to excessive vehicle kinetic energy loss is prevented. The ideal state is when the engine's reverse power consumption brought about by the increased fan speed replaces all or part of the braking power consumption originally required to be provided by the brakes during a steep downhill slope, and this strategy achieves the best fuel-saving effect.

[0034] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0035] like Figure 2 As shown, the following is an embodiment of the control system of the engine electronically controlled silicone oil fan provided by the embodiment of the present disclosure. The system and the control method of the engine electronically controlled silicone oil fan of the above-mentioned embodiments belong to the same inventive concept. For details not described in detail in the embodiment of the control system of the engine electronically controlled silicone oil fan, reference can be made to the embodiment of the control method of the engine electronically controlled silicone oil fan mentioned above.

[0036] The system includes: The vehicle coasting condition recognition module is used to obtain the vehicle's current speed, accelerator pedal opening and engine speed to determine whether the vehicle is in the coasting condition; The engine low temperature state recognition module is used to obtain the current water temperature of the engine and determine whether the engine is in a low temperature state; The fan target speed processing module increases the target speed of the electronically controlled silicone oil fan for cooling the engine when the vehicle is in a coasting condition with gear engaged and the engine is not in a low temperature state.

[0037] This embodiment realizes real-time monitoring and precise control of vehicle and engine conditions by setting a vehicle coasting condition recognition module, an engine low temperature state recognition module, and a fan target speed processing module; by accurately identifying the coasting condition with gear and the engine low temperature state, adjusting the speed of the electronically controlled silicone oil fan, the engine is effectively cooled without increasing additional energy consumption, which not only reduces the fuel consumption of the whole vehicle, improves the economy and competitiveness of the vehicle, but also optimizes the thermal management performance of the engine. In addition, through modular design and intelligent control, the reliability, adaptability and scalability of the system are further improved.

[0038] The control method of the engine electronically controlled silicone oil fan provided in the embodiment of the present application can be applied to electronic devices. Those skilled in the art will understand that the electronic device structure involved in the embodiment of the present invention does not constitute a limitation on the electronic device, and the electronic device may include more or fewer components than shown in the figure, or combine certain components, or arrange components differently. In the embodiment of the present invention, the electronic device includes but is not limited to a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present application described and / or required herein.

[0039] The electronic device may include a processor, an external memory interface, an internal memory, a universal serial bus (USB) interface, a charging management module, a power management module, a battery, a wireless communication module, an audio module, a speaker, a microphone, a sensor module, buttons, a camera, a display, and a SIM card interface, etc.

[0040] It is to be understood that the structure illustrated in the embodiments of the present application does not constitute a specific limitation on the electronic device. In other embodiments of the present application, the electronic device may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0041] The processor may include one or more processing units, for example, the processor may include a central processing unit (CPU), an application processor (AP), a modem processor, a graphics processing unit (GPU), an image signal processor (ISP), a controller, a memory, a video codec, a digital signal processor (DSP), a baseband processor, and / or a neural-network processing unit (NPU), etc. Among them, different processing units may be independent devices or integrated into one or more processors.

[0042] The processor can be the nerve center and command center of the electronic device. The controller can generate an operation control signal according to the instruction operation code and timing signal to complete the control of fetching and executing instructions.

[0043] A memory may also be provided in the processor for storing instructions and data. In some embodiments, the memory in the processor is a cache memory. The memory may store instructions or data that the processor has just used or is cyclically used. If the processor needs to use the instruction or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor, and thus improves system efficiency.

[0044] The above-mentioned electronic device implements the control method of the engine electronically controlled silicone oil fan of the present application to obtain the vehicle's current speed, accelerator pedal opening and engine speed, and judge whether the vehicle is in a coasting condition with gear according to the vehicle's current speed, accelerator pedal opening and engine speed; obtain the current water temperature of the engine, and judge whether the engine is in a low-temperature state according to the current water temperature of the engine combined with a preset water temperature threshold; when the vehicle is in a coasting condition with gear and the engine is not in a low-temperature state, a technical solution of increasing the target speed of the electronically controlled silicone oil fan for cooling the engine is achieved, so as to utilize the characteristic that the engine is reversely dragged and does not spray fuel when the whole vehicle is in a coasting condition with gear, increase the speed of the electronically controlled silicone oil fan, and realize additional cooling of the engine thermal management system. When the whole vehicle exits the coasting condition with gear and the engine is doing positive work, the engine thermal management system is in a relatively low-temperature state, and the demand for the fan is relatively lower, thereby reducing the fan's consumption of the engine's positive work, thereby reducing the beneficial effect of reducing the fuel consumption of the whole vehicle.

[0045] The storage medium provided in the present application stores a program product capable of implementing a control method for an electronically controlled silicone oil fan of an engine.

[0046] The control method of the engine electronically controlled silicone oil fan includes: obtaining the vehicle's current speed, accelerator pedal opening and engine speed, and judging whether the vehicle is in a coasting condition with gear engaged according to the vehicle's current speed, accelerator pedal opening and engine speed; obtaining the engine's current water temperature, and judging whether the engine is in a low-temperature state according to the engine's current water temperature and a preset water temperature threshold; when the vehicle is in a coasting condition with gear engaged and the engine is not in a low-temperature state, increasing the target speed of the electronically controlled silicone oil fan for cooling the engine.

[0047] In some possible embodiments, the control method of the engine electronically controlled silicone oil fan of the present disclosure can be implemented in the form of a program product, which includes a program code. When the program product is run on a terminal device, the program code is used to enable the terminal device to execute the steps described in the above "Exemplary Method" section of this specification according to various exemplary embodiments of the present disclosure.

[0048] The storage medium of the present disclosure can adopt any combination of one or more readable media. The readable medium can be a readable signal medium or a readable storage medium. The readable storage medium can be, for example, but not limited to, a system, device or device of electricity, magnetism, light, electromagnetic, infrared, or semiconductor, or any combination of the above. More specific examples (non-exhaustive list) of readable storage media include: an electrical connection with one or more wires, a portable disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above.

[0049] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A control method for an engine electronically controlled silicone oil fan, characterized in that: The steps include: S1. Obtain the current vehicle speed, accelerator pedal opening, and engine speed, and determine whether the vehicle is in a coasting condition with gear according to the current vehicle speed, accelerator pedal opening, and engine speed; S2. Obtain the current water temperature of the engine, and determine whether the engine is in a low temperature state based on the current water temperature of the engine and a preset water temperature threshold; S3. When the vehicle is in a gear-engaged coasting condition and the engine is not in a low-temperature state, increase the target speed of the electronically controlled silicone oil fan for cooling the engine.

2. The control method of the engine electronically controlled silicone oil fan according to claim 1, characterized in that: The specific steps of step S1 are as follows: S11. Obtain the current vehicle speed, accelerator pedal opening, and engine speed; S12. Determine whether the vehicle is in a coasting condition with gear engaged based on whether the current vehicle speed is 0, whether the current accelerator pedal opening is 0, and whether the current engine speed is higher than a set threshold.

3. The control method of the engine electronically controlled silicone oil fan according to claim 2, characterized in that: The specific steps of step S12 are as follows: S121. Determine whether the current speed of the vehicle is 0; If so, it is determined that the vehicle is currently stationary, and the process ends; If not, it is determined that the vehicle is currently in motion; S122. Determine whether the current accelerator pedal opening of the vehicle is 0; If not, it is determined that the engine of the current vehicle responds to the fuel injection command of the accelerator pedal, and the engine actively injects fuel to perform work, and the process ends; If yes, it is determined that the engine of the current vehicle has not received the fuel injection command from the accelerator pedal, and the engine has not actively injected fuel to perform work; S123. Determine whether the current engine speed of the vehicle is higher than a set threshold; If not, it is determined whether the current vehicle engine is in a neutral coasting state to maintain the driving idle speed, and the passive injection is done, and the end is completed; If so, it is determined that the current vehicle is in a coasting condition with gear engaged.

4. The control method of the engine electronically controlled silicone oil fan according to claim 3, characterized in that: The specific steps of step S2 are as follows: S21. Preset the engine water temperature threshold; S22. Obtain the current water temperature of the engine and compare it with the water temperature threshold; If the current water temperature of the engine is higher than or equal to the water temperature threshold, proceed to step S23; If the current water temperature of the engine is lower than the water temperature threshold, proceed to step S24; S23. Determine that the engine is not in a low temperature state; S24. Determine that the engine is in a low temperature state and the engine has increased fuel consumption due to increased friction, and end.

5. The control method of the engine electronically controlled silicone oil fan according to claim 4, characterized in that: The specific steps of step S21 are as follows: S211. Set test conditions according to ambient temperature, engine load and driving conditions; S212. Test the vehicle under different test conditions and collect the fuel consumption data of the engine at different water temperatures; S213. Analyze the collected data, draw the engine fuel consumption-water temperature curve, and identify the water temperature turning point where the fuel consumption rises beyond the set rate; S214. Combine the engine fuel consumption change and set the preliminary water temperature threshold according to the water temperature turning point; S215. The preliminary water temperature threshold is tested and verified in actual applications, and the preliminary water temperature threshold is fine-tuned and optimized according to the fuel consumption data of the vehicle during the test and verification process to obtain the final water temperature threshold.

6. The control method of the engine electronically controlled silicone oil fan according to claim 4, characterized in that: The specific steps of step S3 are as follows: S31. When the vehicle is coasting with gear engaged and the engine is not in a low temperature state, it is determined that the engine is being dragged and fuel is not being injected, and the engine thermal management system has an additional cooling requirement; S32. Obtain the current control strategy of the electronically controlled silicone oil fan and parse out the target speed required by the fan; S33. Obtaining a preset fan speed correction value, and superimposing the fan speed correction value with the target speed required by the fan to obtain a corrected target speed; S34. Returning the corrected target speed to the current control strategy of the electronically controlled silicone oil fan for execution; S35. According to step S1, it is determined whether the vehicle is still in the coasting condition with the gear, and according to step S2, it is determined whether the engine is still not in a low temperature state; If both conditions are still met, return to step S34; If at least one of the two conditions is no longer satisfied, proceed to step S36; S36. Take out the superimposed fan speed correction value from the corrected target speed to obtain the original target speed and return it to the current control strategy of the electronically controlled silicone oil fan for execution, and return to step S1.

7. The control method of the engine electronically controlled silicone oil fan according to claim 6, characterized in that: The fan speed correction value in step S33 is obtained by the following steps: SS1. Set test conditions according to vehicle speed range and road slope, set monitoring points in the engine thermal management system, and collect temperature values ​​of the monitoring points through temperature sensors; SS2. Start the test under different test conditions and collect the temperature data values ​​of the monitoring points; SS3. Based on the temperature data values ​​collected under different test conditions, determine the fan speed increase range corresponding to the engine water temperature being reduced to the low temperature threshold under different gear-shifting coasting conditions and the coasting speed reduction being less than the speed fluctuation threshold, and select a preliminary fan speed correction value; SS4. Test the preliminary fan speed correction value in actual application. During the test, collect the temperature value of the monitoring point, the fuel consumption of the engine and the operating status of the engine. Fine-tune the preliminary fan speed correction value based on the collected data to obtain the optimal fan speed correction value.

8. A control system for an engine electronically controlled silicone oil fan, characterized in that: include: The vehicle coasting condition recognition module is used to obtain the vehicle's current speed, accelerator pedal opening and engine speed to determine whether the vehicle is in the coasting condition; The engine low temperature state recognition module is used to obtain the current water temperature of the engine and determine whether the engine is in a low temperature state; The fan target speed processing module increases the target speed of the electronically controlled silicone oil fan for cooling the engine when the vehicle is in a coasting condition with gear engaged and the engine is not in a low temperature state.

9. An electronic device, characterized in that: The invention comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the control method of the electronically controlled silicone oil fan of the engine as claimed in any one of claims 1 to 7 when executing the program.

10. A storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for controlling the electronically controlled silicone oil fan of an engine as claimed in any one of claims 1 to 7 are implemented.

Images