Engine control method, medium, electronic device, and hybrid vehicle

Abstract

This invention discloses an engine control method, a medium, electronic equipment, and a hybrid vehicle. The engine control method includes: determining the engine oil emulsification level; obtaining a corresponding start-stop strategy based on the oil emulsification level; and controlling the engine to start and stop according to the start-stop strategy. This method, when controlling engine start-stop, determines the current oil emulsification level within the engine and controls the engine to start and stop using the corresponding start-stop strategy, eliminating the need for user decision-making and improving the intelligence of engine start-stop control. Controlling the engine to execute the corresponding start-stop strategy based on the engine oil emulsification level can protect internal engine components, preventing damage caused by internal oil emulsification problems and extending the engine's service life. Executing the corresponding start-stop strategy based on the engine oil emulsification level can also improve energy efficiency.

Description

Technical Field

[0001] This invention relates to the field of hybrid vehicle control technology, and more particularly to an engine control method, medium, electronic equipment, and hybrid vehicle. Background Technology

[0002] Gasoline-powered vehicles and hybrid electric vehicles have gained a significant market share in recent years. However, hybrid vehicles still face a common problem in low-temperature environments: engine oil emulsification. The primary cause of this problem is prolonged engine operation at low temperatures or frequent start-stop cycles at low temperatures, preventing the engine oil temperature from reaching the engine's normal operating temperature. Simultaneously, water vapor from the engine intake and combustion cannot effectively separate from the engine oil, leading to prolonged mixing and emulsification. Once emulsified, the engine oil's properties deteriorate. Internal engine components, such as crankshaft bearings, camshafts, connecting rod bearings, pistons, and cylinder liners, cannot form an effective oil film, resulting in poor lubrication, accelerated wear between components, and ultimately, significant damage such as engine failure.

[0003] In comparison, hybrid vehicles, especially plug-in hybrid vehicles, have two different driving energy sources, oil and electricity, and the engine's starting control depends on the power battery. This causes the engine to start and stop more frequently, shortens the engine's working time, and greatly increases the risk of engine oil emulsification. If the above problems are not properly solved, it may lead to serious after-sales problems. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one object of this invention is to provide an engine control method that can effectively protect the engine, extend its service life, and improve energy utilization.

[0005] A second objective of this invention is to provide a computer-readable storage medium.

[0006] The third objective of this invention is to provide an electronic device.

[0007] The fourth objective of this invention is to provide a hybrid vehicle.

[0008] To achieve the above objectives, a first aspect of the present invention provides an engine control method, the method comprising: determining the oil emulsification level of the engine; obtaining a corresponding start-stop strategy based on the oil emulsification level; and performing start-stop control on the engine based on the start-stop strategy.

[0009] The engine control method of this invention corresponds to different engine start-stop strategies based on different engine oil emulsification levels. When controlling engine start-stop, by determining the current engine oil emulsification level, the engine is controlled to start and stop according to the corresponding start-stop strategy, eliminating the need for user decision-making and improving the intelligence of engine start-stop control. Controlling the engine to execute the corresponding start-stop strategy based on the engine oil emulsification level can protect internal engine components, prevent damage to engine components due to internal oil emulsification problems, and extend the engine's service life. Executing the corresponding start-stop strategy based on the engine oil emulsification level can also improve energy utilization.

[0010] In addition, the generator control method proposed in the above embodiments of the present invention may also have the following additional technical features:

[0011] According to one embodiment of the present invention, determining the engine oil emulsification grade includes: obtaining the number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time of the engine; calculating the degree of engine oil emulsification based on the number of low-temperature start-stop cycles, the low-temperature operating time, and the high-temperature operating time; and obtaining the engine oil emulsification grade based on the degree of engine oil emulsification.

[0012] According to one embodiment of the present invention, the number of low-temperature start-stop cycles is the number of times the engine starts at a coolant temperature less than or equal to a first preset water temperature and an oil temperature less than or equal to a first preset oil temperature; the low-temperature operating time is the cumulative operating time of the engine at a coolant temperature less than or equal to a second preset water temperature or an oil temperature less than or equal to a second preset oil temperature; the high-temperature operating time is the cumulative operating time of the engine at a coolant temperature greater than or equal to a third preset water temperature and an oil temperature greater than or equal to a third preset oil temperature; wherein, the first preset water temperature < the second preset water temperature < the third preset water temperature, and the first preset oil temperature < the second preset oil temperature < the third preset oil temperature.

[0013] According to an embodiment of the present invention, the degree of emulsification of the engine oil is calculated by the following formula:

[0014] η=λ1×CNT lowTemp +λ2×T lowTemp -λ3×T highTemp

[0015] Where η represents the degree of emulsification of the engine oil, CNT lowTemp T represents the number of times the low-temperature start-stop function has been performed. lowTemp T represents the low-temperature operation time. highTempλ1 represents the emulsification risk weight of the number of low-temperature start-stop cycles, λ2 represents the emulsification risk weight of the low-temperature operation time, and λ3 represents the emulsification risk weight of the high-temperature operation time.

[0016] According to an embodiment of the present invention, obtaining the oil emulsification grade based on the degree of oil emulsification includes: obtaining the oil emulsification grade as a first grade when the degree of oil emulsification is less than a first preset value; obtaining the oil emulsification grade as a second grade when the degree of oil emulsification is less than a second preset value but greater than or equal to the first preset value; obtaining the oil emulsification grade as a third grade when the degree of oil emulsification is less than a third preset value but greater than or equal to the second preset value; and obtaining the oil emulsification grade as a fourth grade when the degree of oil emulsification is greater than or equal to the third preset value.

[0017] According to one embodiment of the present invention, determining the oil emulsification grade of the engine includes: obtaining the ambient temperature of the engine; and when the ambient temperature is greater than or equal to a preset ambient temperature threshold, obtaining the oil emulsification grade as the first grade.

[0018] According to one embodiment of the present invention, a corresponding start-stop strategy is obtained based on the oil emulsification level, including: when the oil emulsification level is the first level, the obtained start-stop strategy is that the anti-emulsification delayed shutdown flag is invalid and the anti-emulsification start-stop power adjustment flag is invalid; when the oil emulsification level is the second level, the obtained start-stop strategy is that the anti-emulsification delayed shutdown flag is valid and the anti-emulsification start-stop power adjustment flag is invalid; when the oil emulsification level is the third level, the obtained start-stop strategy is that the anti-emulsification delayed shutdown flag is valid and the anti-emulsification start-stop power adjustment flag is valid; when the oil emulsification level is the fourth level, the obtained start-stop strategy is that the anti-emulsification continuous start flag is valid.

[0019] According to one embodiment of the present invention, when the anti-emulsification delayed shutdown flag is valid, if the engine meets the shutdown conditions, the engine is controlled to delay shutdown; wherein, the shutdown conditions include the engine's required power being less than the shutdown required power; when the anti-emulsification start-stop power adjustment flag is valid, the engine's starting required power and shutdown required power are adjusted according to the degree of oil emulsification; wherein, the higher the degree of oil emulsification, the lower the corresponding starting required power and shutdown required power; when the anti-emulsification constant start flag is valid, the engine is controlled to remain in a constant start state, and a prompt message is issued to indicate the constant start state.

[0020] According to one embodiment of the present invention, when the anti-emulsification delayed shutdown flag is valid, if the engine meets the shutdown conditions, the engine is controlled to shut down after a preset delay time, wherein the preset delay time is a fixed value, or the preset delay time is positively correlated with the degree of oil emulsification.

[0021] According to one embodiment of the present invention, the method further includes: when the anti-emulsification delayed shutdown flag is valid, if it is detected that the vehicle has a power supply requirement, then after the engine meets the shutdown conditions, the engine is controlled to operate at a preset power to generate electricity; otherwise, the engine is controlled to operate in an idling state until the engine stops.

[0022] According to an embodiment of the present invention, the method is used for a vehicle equipped with the engine, wherein obtaining the number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time of the engine includes: obtaining the number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time of the engine within a recently completed preset mileage of the vehicle.

[0023] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the engine control method as described above.

[0024] To achieve the above objectives, a third aspect of the present invention provides an electronic device including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, it implements the engine control method as described above.

[0025] To achieve the above objectives, a third aspect of the present invention provides a hybrid vehicle including the electronic equipment described above.

[0026] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] Figure 1 This is a flowchart of an engine control method according to an embodiment of the present invention;

[0028] Figure 2 This is a flowchart illustrating the determination of engine oil emulsification grade according to an embodiment of the present invention;

[0029] Figure 3 This is a flowchart of the calculation of the degree of oil emulsification and the determination of the emulsification grade according to an embodiment of the present invention;

[0030] Figure 4This is a flowchart of an embodiment of the present invention for determining the oil emulsification level based on the ring temperature;

[0031] Figure 5 This is a flowchart of an engine start-stop strategy according to an embodiment of the present invention;

[0032] Figure 6 This is a power schematic diagram of engine start-stop line control according to an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of an electronic device according to an embodiment of the present invention;

[0034] Figure 8 This is a schematic diagram of a hybrid vehicle according to an embodiment of the present invention. Detailed Implementation

[0035] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] The following will refer to the instruction manual appendix. Figure 1-8 The present invention provides a detailed description of the engine control method, medium, electronic equipment, and hybrid vehicle according to specific implementation methods.

[0037] Figure 1 This is a flowchart of an engine control method according to an embodiment of the present invention. Figure 1 As shown, the engine control method may include:

[0038] S1 determines the engine oil emulsification level.

[0039] Specifically, engine oil emulsification levels can be categorized into multiple grades based on their degree of emulsification. A lower degree of emulsification indicates a lower risk of oil emulsification, and corresponds to a lower engine oil emulsification grade. When controlling engine start-stop, different start-stop strategies can be implemented based on the engine oil emulsification grade to protect internal engine components and prevent engine damage.

[0040] Because engine start-stop at low temperatures and engine operation at low temperatures increase the risk of oil emulsification, while engine operation at high temperatures promotes oil-water separation, the degree of engine oil emulsification can be determined based on the number of engine start-stop cycles at low temperatures, the duration of low-temperature operation, and the duration of high-temperature operation.

[0041] In one embodiment of the present invention, such as Figure 2 As shown, determining the engine oil emulsification grade may include:

[0042] S11 obtains the number of engine start-stop cycles at low temperatures, low temperature operating time, and high temperature operating time.

[0043] S12 calculates the degree of engine oil emulsification based on the number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time.

[0044] S13 is the oil emulsification grade, which is determined by the degree of oil emulsification.

[0045] Specifically, after the engine is started, the number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time of the engine are obtained. The degree of engine oil emulsification is calculated based on the number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time of the engine to further determine the engine oil emulsification grade.

[0046] In one embodiment of the present invention, such as Figure 3 As shown, the number of low-temperature start-stop cycles is the number of times the engine starts at a coolant temperature less than or equal to the first preset water temperature and an oil temperature less than or equal to the first preset oil temperature; the low-temperature running time is the cumulative running time of the engine at a coolant temperature less than or equal to the second preset water temperature or an oil temperature less than or equal to the second preset oil temperature; the high-temperature running time is the cumulative running time of the engine at a coolant temperature greater than or equal to the third preset water temperature and an oil temperature greater than or equal to the third preset oil temperature; wherein, the first preset water temperature < the second preset water temperature < the third preset water temperature, and the first preset oil temperature < the second preset oil temperature < the third preset oil temperature.

[0047] Specifically, when the engine is started, the engine's coolant temperature and oil temperature are obtained.

[0048] If the engine coolant temperature is less than or equal to the first preset coolant temperature T water1 And the engine oil temperature is less than or equal to the first preset oil temperature T. oil1 This engine start was a cold start; the number of cold start-stop cycles (CNT) is [number missing]. lowTemp Increment the counter by 1, and repeat this process cyclically.

[0049] While the engine is running, the engine coolant temperature and oil temperature are obtained again.

[0050] If the engine coolant temperature is less than or equal to the second preset coolant temperature T water1 Or the engine oil temperature is less than or equal to the second preset oil temperature T. oil2 At this time, the engine is operating at low temperature. Record the duration of the engine operating at low temperature, i.e., the low temperature operation time T. lowTemp .

[0051] If the engine coolant temperature is greater than or equal to the third preset coolant temperature T water3 And the engine oil temperature is greater than or equal to the third preset oil temperature T. oil3 At this point, the engine is operating at high temperature. Record the engine's high-temperature operating time, i.e., the high-temperature operating time T. highTemp .

[0052] More specifically, the degree of engine oil emulsification is calculated using the obtained engine start-stop times at low temperatures, low temperature operating time, and high temperature operating time.

[0053] As a feasible implementation method, the degree of oil emulsification can be calculated using the following formula:

[0054] η=λ1×CNT lowTemp +λ2×T lowTemp -λ3×T highTemp

[0055] Where η represents the degree of oil emulsification, CNT lowTemp T represents the number of times the system starts and stops at low temperatures. lowTemp T represents the low-temperature operating time. highTemp λ1 represents the emulsification risk weight of the number of start-stop cycles at low temperatures, λ2 represents the emulsification risk weight of the low-temperature operation time, and λ3 represents the emulsification risk weight of the high-temperature operation time.

[0056] In embodiments of the present invention, the engine oil emulsification level can be divided into four levels according to the degree of engine oil emulsification η. The engine oil emulsification levels are respectively the first level, the second level, the third level, and the fourth level. The smaller the degree of engine oil emulsification η, the lower the corresponding risk of engine oil emulsification, and the lower the engine oil emulsification level.

[0057] In one embodiment of the present invention, obtaining the oil emulsification grade based on the degree of oil emulsification may include: obtaining a first grade oil emulsification grade when the degree of oil emulsification is less than a first preset value; obtaining a second grade oil emulsification grade when the degree of oil emulsification is less than a second preset value but greater than or equal to the first preset value; obtaining a third grade oil emulsification grade when the degree of oil emulsification is less than a third preset value but greater than or equal to the second preset value; and obtaining a fourth grade oil emulsification grade when the degree of oil emulsification is greater than or equal to the third preset value.

[0058] Specifically, the calculated oil emulsification degree η is compared with a preset value to determine the current engine oil emulsification level. It should be noted that the first preset value < the second preset value < the third preset value < the fourth preset value.

[0059] In an embodiment of the present invention, before determining the oil emulsification level based on the degree of oil emulsification η, the ambient temperature of the engine can be obtained first, and the risk of oil emulsification in the engine can be determined based on the ambient temperature of the engine, thereby determining the oil emulsification level.

[0060] In one embodiment of the present invention, such as Figure 4 As shown, determining the engine oil emulsification grade may include:

[0061] S131, obtain the ambient temperature of the engine.

[0062] S132, when the ambient temperature is greater than or equal to the preset ambient temperature threshold, the oil emulsification level is obtained as the first level.

[0063] Specifically, engine oil emulsification risk typically occurs in low-temperature environments. When the ambient temperature around the engine is high, there is no risk of engine oil emulsification. Therefore, before calculating the degree of engine oil emulsification, the ambient temperature of the engine can be obtained first. When the ambient temperature is greater than or equal to a preset ambient temperature threshold, there is no risk of engine oil emulsification, and the engine oil emulsification level is determined to be Level 1, without needing to calculate the degree of oil emulsification η. When the ambient temperature is less than the preset ambient temperature threshold, then the degree of oil emulsification η is calculated.

[0064] S2 determines the corresponding start-stop strategy based on the oil emulsification level and controls the engine start-stop accordingly.

[0065] Specifically, different oil emulsification grades correspond to different degrees of oil emulsification. Therefore, different engine start-stop strategies can be implemented by controlling the engine according to the oil emulsification grade.

[0066] In one embodiment of the present invention, such as Figure 5 As shown, the corresponding start-stop strategy is obtained based on the oil emulsification level, which may include: when the oil emulsification level is level 1, the start-stop strategy is that the anti-emulsification delayed shutdown flag is invalid and the anti-emulsification start-stop power adjustment flag is invalid; when the oil emulsification level is level 2, the start-stop strategy is that the anti-emulsification delayed shutdown flag is valid and the anti-emulsification start-stop power adjustment flag is invalid; when the oil emulsification level is level 3, the start-stop strategy is that the anti-emulsification delayed shutdown flag is valid and the anti-emulsification start-stop power adjustment flag is valid; when the oil emulsification level is level 4, the start-stop strategy is that the anti-emulsification continuous start flag is valid.

[0067] In one embodiment of the present invention, when the anti-emulsification delayed shutdown flag is valid, if the engine meets the shutdown conditions, the engine is controlled to delay shutdown; wherein, the shutdown conditions include the engine's required power being less than the shutdown required power; when the anti-emulsification start-stop power adjustment flag is valid, the engine's starting required power and shutdown required power are adjusted according to the degree of oil emulsification; wherein, the higher the degree of oil emulsification, the lower the corresponding starting required power and shutdown required power; when the anti-emulsification constant start flag is valid, the engine is controlled to remain in a constant start state, and a prompt message is issued to indicate the constant start state.

[0068] Specifically, indicator lights can be set on the instrument panel corresponding to the anti-emulsification constant start indicator, the anti-emulsification delayed shutdown indicator, and the anti-emulsification start-stop power adjustment indicator. When the anti-emulsification constant start indicator is active, the corresponding indicator light flashes; when the anti-emulsification delayed shutdown indicator is active, the corresponding indicator light flashes; and when the anti-emulsification start-stop power adjustment indicator is active, the corresponding indicator light flashes. By observing whether the corresponding indicator lights on the instrument panel are flashing, it can be determined whether the engine requires anti-emulsification constant start, anti-emulsification delayed shutdown, or anti-emulsification start-stop power adjustment.

[0069] When the engine oil emulsification level is Level 1, it means that there is no risk of engine oil emulsification. No intervention is needed for engine start-stop and engine running time. The anti-emulsification delayed shutdown indicator and the anti-emulsification start-stop power adjustment indicator are invalid.

[0070] When the engine oil emulsification level is Level 2, although there is a risk of oil emulsification, the risk is not significant. Only delayed engine shutdown needs to be controlled, and the anti-emulsification delayed shutdown flag remains active. Specifically, after the engine starts, the anti-emulsification delayed shutdown flag remains active. If the engine meets the shutdown conditions (engine power demand is less than shutdown power demand) and there is no need to restart the engine, a shutdown command can be sent to the engine with a delay using the controller. When controlling the delayed engine shutdown, if there is a need to start the engine again, it is not necessary to restart the engine. This can filter out some rapid and frequent start-stop conditions, reducing the number of start-stop cycles. Furthermore, delaying engine shutdown increases the engine running time to some extent, increasing the probability of maintaining high engine coolant and oil temperatures, thus delaying the upgrade of the oil emulsification level.

[0071] When the engine oil emulsification level is level three, the risk of engine oil emulsification is high. Simply controlling the engine's delayed shutdown cannot effectively solve this risk. In addition to delaying engine shutdown, it is also necessary to adjust the engine's starting and stopping power requirements to increase the probability of engine starting and reduce the probability of engine stopping. Both the anti-emulsification start-stop power adjustment indicator and the anti-emulsification delayed shutdown indicator are effective. It should be noted that the higher the degree of oil emulsification, the lower the corresponding starting and stopping power requirements.

[0072] When the engine oil emulsification rating is level four, the risk of engine oil emulsification is at its highest. This situation is generally caused by human error, which leads to a sudden increase in the risk of oil emulsification. Therefore, when the engine oil emulsification rating is level four, the engine must be kept in a constantly running state, and the anti-emulsification constant start indicator must be valid.

[0073] For better results, when the engine is kept in a constantly running state, a prompt message can be issued to remind the user that the engine needs to remain in a constantly running state for maintenance. This reduces the user's concerns about the engine being constantly running and achieves the purpose of mandatory engine maintenance. The prompt message can be issued by flashing the anti-emulsification constantly running indicator light on the instrument panel, or by issuing a voice prompt: "Due to maintenance requirements, the engine is currently running."

[0074] In an embodiment of the present invention, when the anti-emulsification delayed shutdown flag is valid, if the engine meets the shutdown conditions, the engine is controlled to shut down after a preset delay time, wherein the preset delay time is a fixed value, or the preset delay time is positively correlated with the degree of oil emulsification.

[0075] Specifically, when the anti-emulsification delayed shutdown flag is valid, i.e. when the oil emulsification level is level three or level two, and the engine is determined to meet the shutdown conditions, the engine is controlled to shut down after a fixed delay time, or the engine delay time is determined according to the degree of oil emulsification, and the engine is shut down after the determined delay time.

[0076] In one embodiment of the present invention, the engine control method may further include: when the anti-emulsification delayed shutdown flag is valid, if a power supply requirement for the vehicle is detected, then after the engine meets the shutdown conditions, the engine is controlled to operate at a preset power to generate electricity; otherwise, the engine is controlled to operate at idle speed until the engine stops.

[0077] Specifically, when the anti-emulsification delayed shutdown indicator is valid, i.e., the engine oil emulsification level is level three or two, the system can determine whether the engine should operate in a power generation state below the preset power or in an idling state based on the user's active energy management needs and the corresponding power supply requirements under the operating conditions. More specifically, after the engine meets the shutdown conditions and there is a power supply requirement, the engine is controlled to operate at a preset power to generate electricity. The preset power can be a fixed value or a range. After the engine meets the shutdown conditions and there is no power supply requirement, the engine is controlled to idle until it shuts down. Generating electricity based on the user's and vehicle's power supply requirements not only meets the water-oil separation requirements but also significantly improves energy utilization.

[0078] In one embodiment of the present invention, the engine control method can be used in a vehicle equipped with an engine.

[0079] Specifically, in this embodiment of the invention, the vehicle equipped with an engine can be a gasoline vehicle or a hybrid electric vehicle.

[0080] Specifically, when the engine oil emulsification level is level three, and anti-emulsification start-stop power regulation control is applied to the engine, such as when anti-emulsification start-stop power regulation control is applied to a hybrid electric vehicle, and the hybrid electric vehicle is in a certain state of charge, such as... Figure 6 As shown, when implementing anti-emulsification start-stop power regulation control for the engine of a hybrid electric vehicle, the engine start-stop line shifts from T1 to T2. The working area of ​​EV (Electric Vehicle) mode decreases, while the series working area increases. This reduces both the engine's starting power requirement and its stopping power requirement, making it easier to start and harder to stop. This ensures that the hybrid electric vehicle's energy source is primarily fuel, improving its power reserve capability. Combined with delayed engine shutdown, this significantly increases the engine start time, reduces the probability of engine start-stop, and delays the upgrade of the oil emulsification level.

[0081] When the oil emulsification level is level four, the risk of oil emulsification is at its highest. This situation is generally caused by a sudden increase in the risk of oil emulsification due to human error. For example, a user who frequently charges their car but still drives short distances in HEV (Hybrid Electric Vehicle) mode in low-temperature environments; or a user who frequently starts and stops the engine by activating or disabling other functions that require engine starting in low-temperature environments. Therefore, when the oil emulsification level is level four, in addition to using the methods for levels two and three, it is also necessary to ensure that the engine remains constantly running when the vehicle needs to be driven, so that the engine is kept at a higher temperature for an extended period of time to completely remove water from the oil.

[0082] In one embodiment of the present invention, obtaining the number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time of the engine may include: obtaining the number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time of the engine within the preset mileage recently completed by the vehicle.

[0083] Specifically, the number of cold start-stop cycles (CNT) of the vehicle equipped with the engine within the L1 range of its most recently completed mileage can be obtained. lowTemp Low temperature operation time T lowTemp and high temperature operating time T highTemp CNTs exceeding the L1 mileage range lowTemp T lowTemp T highTemp It is not included in the assessment of emulsification degree.

[0084] When the engine control method of this invention is used in vehicles equipped with engines, the need to prevent oil emulsification is integrated into the conventional engine start-stop control strategy. This effectively prevents engine oil emulsification and reduces engine starts in unknown environments such as when the vehicle is parked or the user is not present, thus improving vehicle safety. If unconventional user control of the engine start-stop system is detected, increasing the risk of oil emulsification, the engine is kept running in environments where the user needs to drive, with relevant prompts provided. This eliminates the need for user decision-making, reducing the risk of engine damage due to oil emulsification for unsuspecting users. In cases where engine start-up is caused by emulsification prevention, power generation is performed based on the user's and vehicle's power needs, significantly improving energy efficiency while meeting the requirements for water-oil separation.

[0085] The engine control method of this invention, when controlling the start-stop of the engine, determines the current oil emulsification level in the engine and controls the engine to start and stop with a corresponding start-stop strategy, eliminating the need for user decision-making and improving the intelligence of engine start-stop control. Controlling the engine to execute the corresponding start-stop strategy based on the engine oil emulsification level can protect internal engine components, prevent damage to engine components due to internal oil emulsification problems, and extend the engine's service life. Executing the corresponding start-stop strategy based on the engine oil emulsification level can also improve energy utilization.

[0086] The present invention also proposes a computer-readable storage medium.

[0087] In one embodiment of the present invention, a computer program is stored on a computer-readable storage medium, and when the computer program is executed by a processor, it implements the engine control method as described above.

[0088] The present invention also proposes an electronic device.

[0089] In one embodiment of the present invention, such as Figure 7 As shown, the electronic device 100 includes a memory 10 and a processor 20. The memory 10 stores a computer program, and when the computer program is executed by the processor 10, it implements the engine control method described above.

[0090] The present invention also proposes a hybrid vehicle.

[0091] In one embodiment of the present invention, such as Figure 8 As shown, the hybrid vehicle 1000 includes the electronic equipment 100 described above.

[0092] The storage medium, electronic device, and hybrid vehicle of the present invention can effectively protect the engine, extend the engine's service life, and improve energy utilization.

[0093] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0094] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0095] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0096] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0097] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0098] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0099] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0100] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An engine control method, characterized in that, The method includes: Determine the engine oil emulsification grade; A corresponding start-stop strategy is obtained based on the oil emulsification level, and the engine is controlled to start and stop according to the start-stop strategy; wherein, obtaining the corresponding start-stop strategy based on the oil emulsification level includes: When the oil emulsification level is the first level, the resulting start-stop strategy is that the anti-emulsification delayed shutdown flag is invalid and the anti-emulsification start-stop power adjustment flag is invalid. When the oil emulsification level is the second level, the resulting start-stop strategy is that the anti-emulsification delayed shutdown flag is valid and the anti-emulsification start-stop power adjustment flag is invalid. When the oil emulsification level is level three, the resulting start-stop strategy is that the anti-emulsification delayed shutdown flag and the anti-emulsification start-stop power adjustment flag are both valid. When the anti-emulsification start-stop power adjustment flag is valid, the engine's start-up power requirement and shutdown power requirement are adjusted according to the degree of oil emulsification to increase the engine's start probability and reduce its shutdown probability. The higher the degree of oil emulsification, the lower the corresponding start-up power requirement and shutdown power requirement. When the oil emulsification level is level four, the resulting start-stop strategy is that the anti-emulsification start flag is valid.

2. The engine control method according to claim 1, characterized in that, Determining the engine oil emulsification grade includes: Obtain the number of start-stop cycles at low temperatures, the operating time at low temperatures, and the operating time at high temperatures of the engine; The degree of oil emulsification of the engine is calculated based on the number of low-temperature start-stop cycles, the low-temperature operating time, and the high-temperature operating time. The oil emulsification grade is obtained based on the degree of oil emulsification.

3. The engine control method according to claim 2, characterized in that, The number of low-temperature start-stop cycles refers to the number of times the engine starts at a coolant temperature less than or equal to a first preset water temperature and an oil temperature less than or equal to a first preset oil temperature. The low-temperature operating time is the cumulative operating time of the engine at a cooling water temperature less than or equal to the second preset water temperature or an oil temperature less than or equal to the second preset oil temperature. The high-temperature operating time is the cumulative operating time of the engine at a cooling water temperature greater than or equal to the third preset water temperature and an oil temperature greater than or equal to the third preset oil temperature. Wherein, the first preset water temperature < the second preset water temperature < the third preset water temperature, and the first preset oil temperature < the second preset oil temperature < the third preset oil temperature.

4. The engine control method according to claim 3, characterized in that, The degree of emulsification of the engine oil is calculated using the following formula: in, This indicates the degree of emulsification of the engine oil. This indicates the number of times the low-temperature start-stop function has been performed. This indicates the low-temperature operation time. This indicates the high-temperature operating time. This indicates the emulsification risk weighting based on the number of low-temperature start-stop cycles. This indicates the emulsification risk weighting during low-temperature operation. This indicates the emulsification risk weight during high-temperature operation.

5. The engine control method according to any one of claims 2-4, characterized in that, The process of obtaining the oil emulsification grade based on the degree of oil emulsification includes: When the degree of emulsification of the engine oil is less than a first preset value, the emulsification level of the engine oil is obtained as the first level; When the degree of emulsification of the engine oil is less than the second preset value but greater than or equal to the first preset value, the engine oil emulsification level is determined to be the second level. When the degree of emulsification of the engine oil is less than a third preset value but greater than or equal to the second preset value, the engine oil emulsification level is obtained as the third level. When the degree of emulsification of the engine oil is greater than or equal to the third preset value, the engine oil emulsification level is obtained as the fourth level.

6. The engine control method according to claim 5, characterized in that, Determining the engine oil emulsification grade includes: Obtain the ambient temperature of the engine; When the ambient temperature is greater than or equal to a preset ambient temperature threshold, the oil emulsification level is determined to be the first level.

7. The engine control method according to claim 1, characterized in that, When the anti-emulsification delayed shutdown flag is valid, if the engine meets the shutdown conditions, the engine is controlled to delay shutdown; wherein, the shutdown conditions include the engine's required power being less than the shutdown required power; When the anti-emulsification constant start flag is valid, the engine is controlled to remain in a constant start state, and a prompt message is issued to indicate the constant start state.

8. The engine control method according to claim 1, characterized in that, When the anti-emulsification delayed shutdown flag is valid, if the engine meets the shutdown conditions, the engine is controlled to shut down after a preset delay time, wherein the preset delay time is a fixed value, or the preset delay time is positively correlated with the degree of oil emulsification.

9. The engine control method according to claim 1, characterized in that, The method further includes: When the anti-emulsification delayed shutdown flag is valid, if a vehicle power supply requirement is detected, the engine will be controlled to operate at a preset power to generate electricity after the engine meets the shutdown conditions; otherwise, the engine will be controlled to operate at idle speed until the engine stops.

10. The engine control method according to claim 2, characterized in that, The method is used in vehicles equipped with the engine, wherein obtaining the number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time of the engine includes: The number of low-temperature start-stop cycles, low-temperature operating time, and high-temperature operating time of the engine within the preset mileage recently completed by the vehicle are obtained.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the engine control method as described in any one of claims 1-10.

12. An electronic device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the computer program is executed by the processor, it implements the engine control method as described in any one of claims 1-10.

13. A hybrid vehicle, characterized in that, Including the electronic device as described in claim 12.

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