Control system and method for preventing engine oil emulsification, engine and vehicle

Abstract

The invention provides an engine oil emulsification prevention control system and method, an engine and a vehicle, the engine oil emulsification prevention control system is applied to the engine, the engine oil emulsification prevention control system comprises a data detection device, a spraying device and a controller, and the controller is electrically connected with the data detection device and the spraying device; the data detection device is used for detecting the current gas state in the cylinder head cover of the engine and sending the current gas state to the controller, the controller is used for controlling starting and stopping of the spraying device on the basis of the current gas state, and the spraying device is used for spraying engine oil to a target area of the cylinder head cover when the spraying device is started. The cylinder head cover can be effectively heated so as to increase the temperature of gas in the cylinder head cover, and meanwhile, the gas in the cylinder head cover can be stirred to flow, so that the risk that water vapor is separated out of the gas in the cylinder head cover can be effectively reduced, and the probability that engine oil is emulsified on the cylinder head cover is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and particularly to an anti-oil emulsification control system, method, engine and vehicle. Background Art

[0002] As an important power source of a vehicle, the working performance of an engine is a key factor affecting the power performance of the vehicle. When the engine is working normally, the mixture gas in the combustion chamber will enter the crankcase through the gap between the piston ring and the cylinder liner, and the mixture gas entering will be discharged from the crankcase through the cylinder head cover in the crankcase ventilation system to avoid the "three leaks" (oil leakage, air leakage, water leakage) problems of the engine.

[0003] However, in winter or when the temperature difference between the inside and outside of the cylinder head cover is large, the water vapor in the mixture gas is extremely easy to condense and mix with the engine oil to form an emulsion, which has a great impact on the working performance of the engine. Especially for methanol fuel, its hydrogen content is relatively high, and the water vapor content in the exhaust gas after combustion increases, and the emulsification risk is further increased.

[0004] Currently, by setting up an air supply system, dry air is introduced into the cylinder head cover and the crankcase through the air supply system to reduce the humidity in the cylinder head cover and the crankcase and prevent water vapor from condensing. At the same time, the air supply is used to maintain the air pressure in the cylinder head cover and the crankcase to avoid moisture inhalation caused by negative pressure. However, there is a problem of emulsification and icing due to insufficient air supply by this method, and in harsh working conditions such as winter, especially for fuels with a large water content after combustion such as methanol, the problem of engine oil emulsification still cannot be effectively solved, thus the working performance of the engine cannot be guaranteed. Summary of the Invention

[0005] To solve the above technical problems, the present application provides an anti-oil emulsification control system, method, engine and vehicle to solve the problem that the oil emulsification in the cylinder head cover cannot be effectively solved in the prior art.

[0006] To achieve the above technical purpose, the embodiments of the present application provide the following technical solutions:

[0007] In a first aspect, an embodiment of the present specification provides an anti-oil emulsification control system applied to an engine. The anti-oil emulsification control system includes a data detection device, a spraying device and a controller, and the controller is electrically connected to the data detection device and the spraying device;

[0008] The data detection device is used to detect the current gas state in the cylinder head cover of the engine and send it to the controller;

[0009] The spraying device is used to spray engine oil to a target area of the cylinder head cover of the engine when it is turned on;

[0010] The controller is used to control the opening and closing of the spray device based on the current gas state.

[0011] In one embodiment, the spray device is connected to one end of a target oil circuit, and the other end of the target oil circuit is connected to an oil storage device of the engine; the target oil circuit is used to transfer the oil in the oil storage device to the spray device.

[0012] In one embodiment, the cylinder head cover is provided with an oil return hole, and the oil return hole is connected to the oil storage device through an oil return passage;

[0013] The oil return hole is used to return the engine oil sprayed to the cylinder head cover to the engine oil storage device through the oil return passage.

[0014] In one embodiment, the spray device includes a switch control device, which is arranged on the target oil circuit, and the switch control device is used to control the on and off of the target oil circuit;

[0015] The controller is used to control the opening and closing of the switch control device based on the current gas state;

[0016] The spraying device is used to spray the engine oil to the target area of ​​the cylinder head cover when the target oil circuit is connected, and to stop spraying the engine oil to the target area of ​​the cylinder head cover when the target oil circuit is closed.

[0017] In one embodiment, the data detection device includes a temperature detection device and a pressure detection device, the temperature detection device is used to detect the current gas temperature in the cylinder head cover, and the pressure detection device is used to detect the current gas pressure in the cylinder head cover;

[0018] The controller is specifically used for:

[0019] determining a target temperature threshold based on a current gas pressure in the cylinder head cover, the target temperature threshold being greater than or equal to a condensation temperature of water vapor at the current gas pressure;

[0020] Based on the magnitude relationship between the current gas temperature and the target temperature threshold, the opening and closing of the spray device is controlled.

[0021] In one embodiment, the controller is specifically configured to:

[0022] If the current gas temperature in the cylinder head cover is less than or equal to the target temperature threshold, controlling the spray device to open;

[0023] If the current gas temperature in the cylinder head cover is greater than the target temperature threshold, the spray device is controlled to be closed.

[0024] In one embodiment, the controller is further configured to:

[0025] Determine a target area of the cylinder head cover based on the gas flow field distribution data in the cylinder head cover.

[0026] In a second aspect, an anti-oil emulsification control method provided by an embodiment of this specification is applied to the anti-oil emulsification control system as described in any one of the above. The method includes:

[0027] Obtain the current gas state in the cylinder head cover;

[0028] Based on the current gas state, control the opening and closing of the spraying device, which is used to spray oil on the target area of the cylinder head cover when it is opened.

[0029] In a third aspect, an embodiment of this specification provides an engine, which includes a cylinder head cover and the anti-oil emulsification control system as described in any one of the above.

[0030] In a fourth aspect, an embodiment of this specification provides a vehicle, which includes the engine as described above.

[0031] In a fifth aspect, an embodiment of this specification provides an electronic device, which includes at least one processor and at least one memory. A computer program is stored in the memory, and when the computer program is executed by the processor, the anti-oil emulsification control method as described above is implemented.

[0032] In a sixth aspect, an embodiment of this specification provides a computer-readable storage medium, on which a computer program is stored. When the computer program is run by a processor, the anti-oil emulsification control method as described above is implemented.

[0033] In a seventh aspect, an embodiment of this specification provides a computer program product or a computer program. The computer program product includes a computer program, and the computer program is stored in a computer-readable storage medium; a processor of the computer device reads the computer program from the computer-readable storage medium, and when the processor executes the computer program, the anti-oil emulsification control method as described above is implemented.

[0034] As can be seen from the above technical solutions, the embodiments of the present application provide an anti-oil emulsification control system, method, engine, and vehicle. This solution is applied to an engine. The anti-oil emulsification control system includes a data detection device, a spraying device, and a controller. The controller is electrically connected to the data detection device and the spraying device. The data detection device is used to detect the current gas state in the cylinder head cover of the engine and send it to the controller. The controller is used to control the opening and closing of the spraying device based on the current gas state. The spraying device is used to spray oil on the target area of the cylinder head cover when it is opened. Thus, by spraying oil on the target area of the cylinder head cover, the cylinder head cover can be effectively heated to increase the gas temperature in the cylinder head cover. At the same time, the gas flow in the cylinder head cover can be stirred, thereby effectively reducing the risk of water vapor precipitating from the gas in the cylinder head cover, and further reducing the probability of oil emulsification occurring on the cylinder head cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0036] Figure 1 FIG. is a schematic structural diagram of an anti-oil emulsification control system provided for the embodiments of this specification.

[0037] Figure 2 FIG. is a schematic structural diagram of a switch control device provided for the embodiments of this specification.

[0038] Figure 3 FIG. is a schematic diagram of a predetermined correspondence relationship between gas pressure and condensation temperature provided for the embodiments of this specification.

[0039] Figure 4 FIG. is a schematic flow diagram of an anti-oil emulsification control method provided for the embodiments of this specification. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of this specification should have the ordinary meaning understood by those of ordinary skill in the art to which this specification belongs. The "first", "second", and similar terms used in the embodiments of this specification do not indicate any order, quantity, or importance, but are only used to avoid confusion of components.

[0041] Unless otherwise required by the context, throughout the specification, "a plurality of" means "at least two", and "comprising" is interpreted in an open, inclusive sense, that is, "including, but not limited to". In the description of the specification, terms such as "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" are intended to indicate that specific features, structures, materials, or characteristics related to the embodiment or example are included in at least one embodiment or example of this specification. The schematic representations of the above terms do not necessarily refer to the same embodiment or example.

[0042] The technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this specification without creative efforts shall fall within the scope of protection of this specification.

[0043] Overview

[0044] As described in the background art, the engine is an important power source of a vehicle, and its working performance is a key factor affecting the vehicle's power performance. When the engine is working normally, the mixture gas in the combustion chamber will leak into the crankcase through the gap between the piston ring and the cylinder liner, and the leaked mixture gas will be discharged from the crankcase through the cylinder head cover in the crankcase ventilation system to avoid the "three leaks" (oil leakage, air leakage, and water leakage) problems of the engine. With the increasing requirements for emissions, heavy-duty diesel engines have been transformed from an open crankcase ventilation system to a closed crankcase ventilation system. A cylinder head cover and a ventilation pipeline are usually provided in the closed crankcase ventilation system. The mixture gas leaking into the crankcase enters the cylinder head cover, and the oil and gas in the mixture gas are preliminarily separated by the oil and gas separator in the cylinder head cover. The separated gas is transported through the ventilation pipeline to the intake pipe or intake manifold for re-combustion, and is discharged from the exhaust pipe after re-combustion to prevent the mixture gas from polluting the atmosphere.

[0045] However, in winter or when there is a large temperature difference between the inside and outside of the cylinder head cover, the water vapor in the mixed gas is extremely likely to condense and mix with the engine oil to form an emulsion. Especially for methanol fuel, which has a high hydrogen content, the water vapor content in the exhaust gas after combustion increases, further increasing the risk of emulsification. On the one hand, the emulsification of engine oil will cause a decline in the lubrication performance of the engine, which in turn leads to increased wear of the internal components of the engine. Moreover, poor lubrication and increased friction will result in a decrease in the power output of the engine. On the other hand, the emulsification of engine oil causes a decline in the performance of the crankcase ventilation system, making it impossible to effectively discharge the mixed gas from the crankcase. As a result, it is easy to cause the problem of "three leaks" in the engine. In a low-temperature environment such as winter, it is also prone to icing, blocking pipelines and damaging components such as oil-gas separators, resulting in the failure of the crankcase ventilation system. Therefore, preventing the emulsification of engine oil in the cylinder head cover can effectively ensure the working performance of the engine.

[0046] Currently, by setting up a gas supplement system to introduce dry air into the cylinder head cover and the crankcase through the gas supplement system, the humidity inside the cylinder head cover and the crankcase is reduced to prevent the condensation of water vapor. At the same time, the air pressure in the cylinder head cover and the crankcase is maintained through gas supplementation to avoid the inhalation of moisture due to negative pressure. However, there is a problem of emulsification and icing due to insufficient gas supplementation in this method. Moreover, in harsh working conditions such as winter, especially for fuels with a large water content after combustion such as methanol, the problem of engine oil emulsification still cannot be effectively solved, thus unable to ensure the working performance of the engine.

[0047] In order to solve the problem that the emulsification of engine oil in the cylinder head cover cannot be effectively solved by traditional methods, in the technical solution of this application, an anti-engine oil emulsification control solution is provided, which is applied to an engine. The anti-engine oil emulsification control system includes a data detection device, a spraying device, and a controller. The controller is electrically connected to the data detection device and the spraying device. The data detection device is used to detect the current gas state inside the cylinder head cover of the engine and send it to the controller. The controller is used to control the opening and closing of the spraying device based on the current gas state. The spraying device is used to spray engine oil onto the target area of the cylinder head cover when it is opened. Thus, by spraying engine oil onto the target area of the cylinder head cover, the cylinder head cover can be effectively heated to increase the gas temperature inside the cylinder head cover. At the same time, the gas flow inside the cylinder head cover can be stirred, thereby effectively reducing the risk of water vapor precipitating from the gas inside the cylinder head cover, and further reducing the probability of engine oil emulsification occurring on the cylinder head cover.

[0048] Based on the above inventive concept, the anti-engine oil emulsification control system provided by the embodiments of this specification will be described exemplarily below.

[0049] Exemplary System

[0050] The embodiments of this specification provide an anti-engine oil emulsification control system, which is applied to an engine, as Figure 1As shown, the anti-engine oil emulsification control system includes a data detection device 101, a spraying device 103, and a controller 102. The controller 102 is electrically connected to the data detection device 101 and the spraying device 103;

[0051] The data detection device 101 is used to detect the current gas state in the cylinder head cover of the engine and send it to the controller 102;

[0052] The spraying device 103 is used to spray engine oil onto the target area of the cylinder head cover when it is turned on;

[0053] The controller 102 is used to control the opening and closing of the spraying device 103 based on the current gas state.

[0054] Specifically, the data detection device 101 can be used to detect the current gas state in the cylinder head cover. The current gas state in the cylinder head cover can include the current physical state of the gas in the cylinder head cover (such as gaseous, liquid, gas-liquid mixed state, etc.). For example, the current gas state in the cylinder head cover can include the current temperature and current pressure of the gas in the cylinder head cover. Thus, the current physical state of the gas in the cylinder head cover can be determined according to the current temperature and current pressure of the gas in the cylinder head cover.

[0055] The data detection device 101 is electrically connected to the controller 102 and transmits the detected current gas state to the controller 102 in real time. At the same time, the controller 102 can also be electrically connected to the control component of the spraying device 103. The control component of the spraying device 103 can be a switch control device to control the opening and closing of the spraying device 103 through this control component.

[0056] In implementation, the controller 102 can control the opening and closing of the spraying device 103 based on the current gas state in the cylinder head cover. For example, when the current gas state in the cylinder head cover indicates that the current physical state of the gas in the cylinder head cover is liquid or gas-liquid mixed state, the spraying device 103 can be controlled to open, and when the current gas state in the cylinder head cover indicates that the current physical state of the gas in the cylinder head cover is gaseous, the spraying device 103 can be controlled to close.

[0057] When the spraying device 103 is turned on, it can spray oil on the target area of the cylinder head cover, and the oil sprayed by the spraying device 103 can be heated oil. The target area can be set according to actual needs. For example, it can be the area in the cylinder head cover where oil emulsification is likely to occur. Among them, the spraying device 103 can be connected to the oil storage device through an oil circuit. The oil storage device can be a newly added storage device for storing the oil to be sprayed by the spraying device 103, or it can also be an existing storage device in the engine, such as an oil pan. The control component of the spraying device 103 can be arranged on the spraying device 103 to control the opening and closing of the spraying device 103 through the control component; in addition, the control component of the spraying device 103 can also be arranged on the oil circuit connected to the spraying device 103 to control the opening and closing of the spraying device 103 by controlling the on-off of the oil circuit.

[0058] The position of the spraying device 103 can be set according to actual needs. For example, the spraying device 103 can be arranged on the camshaft bearing cover. Among them, the camshaft bearing cover can be used to fix and support the camshaft, and it is fixedly connected to the top of the cylinder head. In addition, the spraying device 103 can also be arranged at any position between the cylinder head and the cylinder head cover.

[0059] By spraying oil on the target area of the cylinder head cover, the cylinder head cover can be effectively heated to increase the gas temperature inside the cylinder head cover, reduce the probability of water vapor condensation and precipitation in the gas inside the cylinder head cover, and thus reduce the probability of oil emulsification on the cylinder head cover. At the same time, by spraying oil on the target area of the cylinder head cover, the gas flow inside the cylinder head cover can be stirred, so as to prevent the water vapor in the gas inside the cylinder head cover from accumulating in certain areas, avoid the local water vapor concentration reaching saturation and precipitating from the gas inside the cylinder head cover, and reduce the probability of oil emulsification on the cylinder head cover. In addition, by stirring the gas flow inside the cylinder head cover, the gas inside the cylinder head cover can be prevented from staying inside the cylinder head cover, and thus the risk of water vapor condensation on the surface of the cylinder head cover with a lower temperature in the gas is reduced, thereby effectively reducing the probability of oil emulsification on the cylinder head cover.

[0060] It can be understood that when it is determined that the spraying device 103 needs to be turned on based on the current gas state inside the cylinder head cover, the oil spraying flow rate of the spraying device 103 can be further determined to minimize the probability of oil emulsification on the cylinder head cover.

[0061] In a feasible implementation manner, the spraying device 103 is connected to one end of the target oil circuit, and the other end of the target oil circuit is connected to the oil storage device of the engine; the target oil circuit is used to transmit the oil in the oil storage device to the spraying device 103.

[0062] Specifically, the spraying device 103 can be connected to the engine oil storage device through the target oil passage. One end of the target oil passage is connected to the spraying device 103, and the other end is connected to the engine oil storage device. That is, the engine oil in the oil storage device can be transmitted to the spraying device 103 through the target oil passage.

[0063] Among them, the target oil passage can be an existing oil passage in the engine. That is, during the operation of the engine, the engine oil can be transmitted to corresponding components, such as the camshaft, valve, etc. through this oil passage for lubrication. In implementation, a branch can be added to this oil passage, and the spraying device 103 can be connected to this branch, thereby greatly reducing the complexity of the anti-oil emulsification control system. It can be understood that the target oil passage can also be a newly added oil passage.

[0064] Among them, the engine oil storage device can be used to store engine oil, so that the engine oil stored in the oil storage device can be transmitted to corresponding components through various oil passages in the engine to achieve lubrication of the corresponding components. The lubricated engine oil can also flow back to the engine oil storage device through the engine oil return structure to achieve the recycling of engine oil. Due to the transfer of heat generated in the combustion chamber during the operation of the engine, and the heat generated by the friction of corresponding components in the engine during the engine oil lubrication process, etc., the temperature of the engine oil will increase. Therefore, spraying engine oil on the target area of the cylinder head cover through the spraying device 103 can effectively increase the temperature of the target area of the cylinder head cover, thereby reducing the risk of water vapor in the gas in the cylinder head cover condensing and precipitating, and further reducing the probability of engine oil emulsification on the cylinder head cover.

[0065] In a feasible implementation manner, an oil return hole is provided on the cylinder head cover, and the oil return hole is connected to the oil storage device through an oil return passage;

[0066] The oil return hole is used to return the engine oil sprayed on the cylinder head cover to the oil storage device through the oil return passage.

[0067] Specifically, an oil return hole can be provided on the cylinder head cover. Among them, the oil return hole can be connected to the engine oil storage device through an oil return passage. The engine oil sprayed on the cylinder head cover can flow back to the engine oil storage device through the oil return hole and the oil return passage to achieve the recycling of engine oil. On the one hand, through the recycling of engine oil, the consumption of engine oil can be effectively reduced. On the other hand, during the process of spraying engine oil on the target area of the cylinder head cover to heat the cylinder head cover, the temperature of the engine oil can be effectively reduced. Furthermore, by returning the sprayed engine oil to the engine oil storage device, the temperature of the engine oil in the engine oil storage device can be effectively reduced. Therefore, the lubrication effect of the engine oil can be effectively guaranteed, and the probability of engine oil aging caused by too high temperature can be reduced.

[0068] During implementation, the position of the oil return hole can be set according to actual needs. For example, it can be set at the bottom of the cylinder head cover. As a result, the oil sprayed onto the cylinder head cover can flow into the oil return hole under the action of gravity and return to the oil storage device of the engine through the oil return channel. There is no need to add additional oil extraction devices such as oil pumps, and the structure is simple.

[0069] In a feasible implementation manner, the spray device includes a switch control device, the switch control device is arranged on the target oil circuit, and the switch control device is used to control the on and off of the target oil circuit;

[0070] The controller 102 is used to control the opening and closing of the switch control device based on the current gas state;

[0071] The spraying device 103 is used to spray the engine oil to the target area of ​​the cylinder head cover when the target oil circuit is connected, and to stop spraying the engine oil to the target area of ​​the cylinder head cover when the target oil circuit is closed.

[0072] Specifically, the switch control device may be an electrically controlled switch, such as a solenoid valve, an electric ball valve, a proportional valve, etc. The switch control device may be used to control the on-off of the target oil circuit, so as to control the opening and closing of the spray device 103 by controlling the on-off of the target oil circuit. It is understandable that the flow rate of the oil in the target oil circuit may also be controlled by controlling the opening of the switch control device, thereby controlling the flow rate of the spray device 103.

[0073] During implementation, the controller 102 can control the opening and closing of the switch control device based on the current gas state in the cylinder head cover. For example, when the current gas state in the cylinder head cover indicates that the current physical state of the gas in the cylinder head cover is liquid or a gas-liquid mixed state, the switch control device can be controlled to open, thereby controlling the target oil circuit to be conductive; and, when the current gas state in the cylinder head cover indicates that the current physical state of the gas in the cylinder head cover is gaseous, the switch control device can be controlled to close, thereby controlling the target oil circuit to be closed.

[0074] Among them, when the target oil circuit is connected, the oil in the oil storage device can be transmitted to the spray device 103 through the target oil circuit, so as to spray the oil to the target area of ​​the cylinder head cover through the spray device 103, thereby effectively reducing the probability of oil emulsification on the cylinder head cover.

[0075] Optional, such as Figure 2As shown, the switch control device 200 may include an electromagnetic drive structure 201, a magnetic structure 202, a slider 203 and an elastic structure 204. One end of the slider 203 is connected to the magnetic structure 202, and the other end is connected to the elastic structure 204. The electromagnetic drive structure 201 is arranged at one end of the magnetic structure 202 away from the slider 203. The electromagnetic drive structure 201 may be an electromagnetic coil, such as a copper wire package, the magnetic structure 202 may be a magnet, and the elastic structure 204 may be a spring. When the control switch control device is turned on, a current signal can be sent to the electromagnetic drive structure 201 so that the electromagnetic drive structure 201 is energized and magnetized, thereby, the electromagnetic drive structure 201 and the magnetic structure 202 repel each other, and the magnetic structure 202 drives the slider 203 to move toward the elastic structure 204 under the action of the repulsive force, so that the target oil circuit is connected; when the control switch control device is turned off, the current signal can be stopped from being sent to the electromagnetic drive structure 201, so that the electromagnetic drive structure 201 loses power and the magnetism disappears, thereby, the slider 203 is pushed to move toward the magnetic structure 202 through the elastic structure 204, so that the target oil circuit is closed. It can be understood that the moving direction of the slider 203 is perpendicular to the direction of the central axis of the target oil circuit, and when the elastic structure 204 is in a natural state (i.e., a state not subject to external force), the slider 203 can completely cut off the target oil circuit.

[0076] Therefore, the opening and closing of the spray device 103 can be quickly and effectively controlled through the switch control device.

[0077] In a feasible implementation manner, the data detection device 101 includes a temperature detection device and a pressure detection device, the temperature detection device is used to detect the current gas temperature in the cylinder head cover, and the pressure detection device is used to detect the current gas pressure in the cylinder head cover;

[0078] The controller 102 is specifically used for:

[0079] determining a target temperature threshold based on a current gas pressure in the cylinder head cover, the target temperature threshold being greater than or equal to a condensation temperature of water vapor at the current gas pressure;

[0080] Based on the magnitude relationship between the current gas temperature and the target temperature threshold, the opening and closing of the spray device 103 is controlled.

[0081] Specifically, the data detection device 101 may include a temperature detection device and a pressure detection device, both of which are connected to the controller 102. Among them, the temperature detection device and the pressure detection device may both be disposed on the cylinder head cover to detect the temperature of the gas in the cylinder head cover in real time through the temperature detection device, and to detect the pressure of the gas in the cylinder head cover in real time through the pressure detection device. The current gas temperature in the cylinder head cover may be the temperature of the gas in the cylinder head cover at the current moment, and the current gas pressure in the cylinder head cover may be the pressure of the gas in the cylinder head cover at the current moment. That is, the current gas state in the cylinder head cover may include the current gas temperature and the current gas pressure in the cylinder head cover.

[0082] In implementation, the controller 102 may determine a target temperature threshold based on the current gas pressure in the cylinder head cover. Among them, the target temperature threshold may be greater than or equal to the condensation temperature of water vapor at the current gas pressure.

[0083] Optionally, the target temperature threshold may be determined based on the current gas pressure in the cylinder head cover and a predetermined correspondence relationship between the gas pressure and the condensation temperature. The predetermined correspondence relationship may be a mapping table, a relationship curve, a function expression, etc., and may be specifically set according to actual requirements. Optionally, the predetermined correspondence relationship between the gas pressure and the condensation temperature may be as Figure 3 shown.

[0084] Among them, the condensation temperature at the current gas pressure may be determined based on the current gas pressure and the predetermined correspondence relationship between the gas pressure and the condensation temperature, and the target temperature threshold may be determined based on the condensation temperature at the current gas pressure. For example, the condensation temperature at the current gas pressure may be directly used as the target temperature threshold, or the sum of the condensation temperature at the current gas pressure and a predetermined compensation value may be used as the target temperature threshold, and the predetermined compensation value is greater than 0. Thus, when the current gas temperature in the cylinder head cover is close to the condensation temperature at the current gas pressure, the spraying device 103 can be controlled to be turned on to spray oil on the target area of the cylinder head cover, so as to further reduce the probability of oil emulsification in the cylinder head cover.

[0085] In implementation, the opening and closing of the spraying device 103 may be controlled based on the magnitude relationship between the current gas temperature in the cylinder head cover and the target temperature threshold, so as to achieve precise control of the spraying device 103, and further, by controlling the opening and closing of the spraying device 103, the probability of oil emulsification in the cylinder head cover can be effectively reduced.

[0086] In a feasible implementation manner, the controller 102 is specifically configured to:

[0087] If the current gas temperature in the cylinder head cover is less than or equal to the target temperature threshold, control the spraying device 103 to be turned on;

[0088] If the current gas temperature in the cylinder head cover is greater than the target temperature threshold, control the spray device 103 to close.

[0089] Specifically, if the current gas temperature in the cylinder head cover is less than or equal to the target temperature threshold, it indicates that the current physical state of the gas in the cylinder head cover is liquid or gas-liquid mixture or approaching conversion to liquid, and there is a risk of engine oil emulsification. At this time, the spray device 103 can be controlled to open to spray engine oil to the target area of the cylinder head cover through the spray device 103, so as to effectively reduce the probability of engine oil emulsification occurring in the cylinder head cover.

[0090] If the current gas temperature in the cylinder head cover is greater than the target temperature threshold, it indicates that the current physical state of the gas in the cylinder head cover is gaseous and relatively stable, and there is no risk of engine oil emulsification. At this time, the spray device 103 can be controlled to close.

[0091] It can be understood that when the current gas temperature in the cylinder head cover is less than or equal to the target temperature threshold, the target opening of the switch control device can also be determined based on the difference between the current gas temperature and the target temperature threshold, so as to control the flow rate of the spray device 103 according to the target opening of the switch control device. For example, the target opening of the switch control device is negatively correlated with this difference. The greater the difference between the current gas temperature and the target temperature threshold, the smaller the target opening of the switch control device; conversely, the smaller the difference between the current gas temperature and the target temperature threshold, the greater the target opening of the switch control device, so as to effectively reduce the probability of engine oil emulsification occurring in the cylinder head cover while minimizing the consumption of engine oil. In implementation, the target opening of the switch control device can be determined based on the difference between the current gas temperature and the target temperature threshold and the predetermined corresponding relationship between the temperature difference and the opening of the switch control device. The predetermined corresponding relationship can be a mapping table, a relationship curve, a function expression, etc., which can be specifically set according to actual needs.

[0092] In a feasible implementation manner, the controller 102 is further configured to:

[0093] Determine the target area of the cylinder head cover based on the gas flow field distribution data in the cylinder head cover.

[0094] Specifically, the gas flow field distribution data in the cylinder head cover may include the flow direction and flow path of the gas in the cylinder head cover. Among them, the gas flow in the cylinder head cover can be simulated by simulation software such as fluid mechanics to obtain simulation data such as the gas flow velocity and pressure in each area of the cylinder head cover, so as to determine the gas flow field distribution data in the cylinder head cover according to the simulation data.

[0095] During implementation, based on the gas flow field distribution data inside the cylinder head cover, the area where the gas flows through in the cylinder head can be determined as the initial area. Based on this initial area, the target area of the cylinder head cover can be determined. The target area can completely cover the initial area, and the area of the target area can be larger than that of the initial area. Thus, by controlling the spraying device 103 to spray oil on the target area of the cylinder head cover, the probability of oil emulsification occurring inside the cylinder head cover can be effectively reduced.

[0096] Exemplary method

[0097] In an exemplary embodiment of this specification, a method for controlling anti-oil emulsification is also provided, which is applied to the anti-oil emulsification control system described in any of the above embodiments, as Figure 4 shown, the method includes:

[0098] S401. Obtain the current gas state inside the cylinder head cover;

[0099] S402. Based on the current gas state, control the opening and closing of the spraying device 103, and the spraying device 103 is used to spray oil on the target area of the cylinder head cover when it is opened.

[0100] In a feasible embodiment, the current gas state inside the cylinder head cover includes the current gas temperature and the current gas pressure inside the cylinder head cover;

[0101] The controlling the opening and closing of the spraying device 103 based on the current gas state includes:

[0102] Based on the current gas pressure inside the cylinder head cover, determine a target temperature threshold, and the target temperature threshold is greater than or equal to the condensation temperature of water vapor under the current gas pressure;

[0103] Based on the magnitude relationship between the current gas temperature and the target temperature threshold, control the opening and closing of the spraying device 103.

[0104] In a feasible embodiment, the controlling the opening and closing of the spraying device 103 based on the magnitude relationship between the current gas temperature and the target temperature threshold includes:

[0105] If the current gas temperature inside the cylinder head cover is less than or equal to the target temperature threshold, then control the spraying device 103 to open;

[0106] If the current gas temperature inside the cylinder head cover is greater than the target temperature threshold, then control the spraying device 103 to close.

[0107] In a feasible embodiment, the method for determining the target area of the cylinder head cover includes:

[0108] Determine the target area of the cylinder head cover based on the gas flow field distribution data within the cylinder head cover.

[0109] The anti-oil emulsification control method provided in this embodiment belongs to the same inventive concept as the anti-oil emulsification control system provided in the above embodiments of the present application. The controller 102 in the anti-oil emulsification control system can execute the anti-oil emulsification control method provided in any of the above embodiments of the present application, and the controller 102 is equipped with corresponding functional modules for executing the anti-oil emulsification control method. For technical details not described in detail in this embodiment, reference can be made to the specific processing content of the anti-oil emulsification control system provided in the above embodiments of the present application, which will not be elaborated here.

[0110] Exemplary device

[0111] In an exemplary embodiment of this specification, an engine is further provided. The engine includes a cylinder head cover and the anti-oil emulsification control system according to any of the above embodiments.

[0112] In an exemplary embodiment of this specification, an electronic device is further provided. The electronic device includes at least one processor and at least one memory. A computer program is stored in the memory, and when the computer program is executed by the processor, it implements the anti-oil emulsification control method according to any of the above embodiments.

[0113] In an exemplary embodiment of this specification, a vehicle is further provided. The vehicle includes the engine as described above.

[0114] Exemplary Computer Program Product and Storage Medium

[0115] In addition to the above methods and devices, the anti-oil emulsification control method provided in the embodiments of this specification can also be a computer program product, which includes computer program instructions. When the computer program instructions are run by a processor, the processor is caused to execute the steps in the anti-oil emulsification control method according to various embodiments of this specification described in the "Exemplary Method" section above.

[0116] The computer program product can be written in any combination of one or more programming languages for programming code to perform the operations of the embodiments of this specification. The programming languages include object-oriented programming languages such as Java, C++, etc., and also include conventional procedural programming languages such as the "C" language or similar programming languages.

[0117] In addition, the embodiments of the present specification also provide a computer-readable storage medium, on which a computer program is stored, and the computer program is executed by a processor to perform the steps in the anti-engine oil emulsification control method according to various embodiments of the present specification described in the above "Exemplary Method" section of the present specification.

[0118] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, storage, database, or other medium used in the embodiments provided in the present specification can include non-volatile and / or volatile memories. Non-volatile memories can include read-only memory (ROM), programmable ROM (PROM), electrically programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), or flash memory. Volatile memories can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in various forms, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), Rambus direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and Rambus dynamic RAM (RDRAM), etc.

[0119] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0120] The above-described embodiments merely represent several implementation manners of the present specification. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the solutions provided by the embodiments of the present specification. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present specification, several modifications and improvements can still be made, and these all belong to the protection scope of the present specification. Therefore, the protection scope of the patent of the present specification should be subject to the appended claims.

Claims

1. An anti-oil emulsification control system, characterized in that: Applied to an engine, the anti-oil emulsification control system comprises a data detection device, a spray device and a controller, wherein the controller is electrically connected to the data detection device and the spray device; The data detection device is used to detect the current gas state in the cylinder head cover of the engine and send it to the controller; The spray device is used to spray engine oil to a target area of ​​the cylinder head cover of the engine when turned on; The controller is used to control the opening and closing of the spray device based on the current gas state.

2. The anti-oil emulsification control system according to claim 1, characterized in that: The spray device is connected to one end of a target oil circuit, and the other end of the target oil circuit is connected to an oil storage device of the engine; the target oil circuit is used to transfer the oil in the oil storage device to the spray device.

3. The anti-oil emulsification control system according to claim 2, characterized in that: The cylinder head cover is provided with an oil return hole, and the oil return hole is connected to the oil storage device through an oil return passage; The oil return hole is used to return the engine oil sprayed to the cylinder head cover to the engine oil storage device through the oil return passage.

4. The anti-oil emulsification control system according to claim 2, characterized in that: The spray device includes a switch control device, which is arranged on the target oil circuit and is used to control the on and off of the target oil circuit; The controller is used to control the opening and closing of the switch control device based on the current gas state; The spraying device is used to spray the engine oil to the target area of ​​the cylinder head cover when the target oil circuit is connected, and to stop spraying the engine oil to the target area of ​​the cylinder head cover when the target oil circuit is closed.

5. The anti-oil emulsification control system according to any one of claims 1 to 4, characterized in that: The data detection device includes a temperature detection device and a pressure detection device, wherein the temperature detection device is used to detect the current gas temperature in the cylinder head cover, and the pressure detection device is used to detect the current gas pressure in the cylinder head cover; The controller is specifically used for: determining a target temperature threshold based on a current gas pressure in the cylinder head cover, the target temperature threshold being greater than or equal to a condensation temperature of water vapor at the current gas pressure; Based on the magnitude relationship between the current gas temperature and the target temperature threshold, the opening and closing of the spray device is controlled.

6. The anti-oil emulsification control system according to claim 5, characterized in that: The controller is specifically used for: If the current gas temperature in the cylinder head cover is less than or equal to the target temperature threshold, controlling the spray device to open; If the current gas temperature in the cylinder head cover is greater than the target temperature threshold, the spray device is controlled to be closed.

7. The anti-oil emulsification control system according to any one of claims 1 to 4, characterized in that: The controller is also used for: Based on the gas flow field distribution data in the cylinder head cover, a target area of ​​the cylinder head cover is determined.

8. A method for preventing engine oil from emulsifying, characterized in that: Applied to the anti-oil emulsification control system according to any one of claims 1 to 7, the method comprises: Acquiring a current gas state in the cylinder head cover; Based on the current gas state, the opening and closing of the spray device is controlled, and the spray device is used to spray engine oil to a target area of ​​the cylinder head cover when it is turned on.

9. An engine, characterized in that: The engine comprises a cylinder head cover and an anti-oil emulsification control system according to any one of claims 1 to 7.

10. A vehicle, characterized in that: The vehicle includes the engine of claim 9.

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