A method and system for detecting engine oil dilution in a gasoline engine and a vehicle thereof

Abstract

The present invention discloses a method and system for detecting engine oil dilution of a gasoline engine and a vehicle thereof, including an accumulator and an integrator. The method steps include: collecting vehicle status information and environmental information; detecting the engine starting temperature and engine speed to decide whether to enable the accumulator; detecting the engine water temperature and engine speed to decide whether to enable the integrator; detecting the output value of the integrator to decide whether to enable the accumulator; and outputting an engine oil dilution degree factor. The method for calculating the engine oil dilution factor of the gasoline engine provided by the present invention can be used to calculate the dilution degree of the engine oil. This factor is affected by each start and operation of the engine, and can continuously and long-term monitor the quality of the engine oil. This factor can be used as a correction factor for systems such as fuel injection, emission, and air-fuel ratio calculation, to avoid the situation that the excessive evaporation of gasoline in the engine oil affects the EMS control effect, notify the user to eliminate the influence of engine oil dilution as soon as possible by changing the usage scenario or working condition, and extend the service life of the engine oil.

Description

Technical Field

[0001] The present invention relates to an engine oil dilution detection method, a system and a vehicle thereof, and particularly to a gasoline engine oil dilution detection method, a system and a vehicle thereof. Background Art

[0002] In the prior art, to detect engine oil dilution, it is necessary to extract an oil sample and then detect the oil dilution through instrument equipment, or install equipment and sensors in the engine for oil dilution detection, or the influence of engine cold start on oil dilution is not calculated, or the influence of intake air volume on oil dilution is not considered. Under the condition of low ambient temperature, during the cold start process of the engine, the temperature of the cylinder wall is too low. After gasoline is injected into the cylinder, it is not fully atomized and adheres to the cylinder wall, forming an oil film that is not easily vaporized. Along with the movement of the cylinder piston, it enters the crankcase along the inner side of the cylinder wall, or is mixed into the engine oil along with the lubrication and cooling systems. If too much gasoline enters the engine oil, the engine oil will be diluted, the viscosity of the engine oil will decrease, and problems such as excessive wear and carbon deposition are likely to occur, affecting the performance and life of the engine.

[0003] The similar products in the prior art install sensors in the engine oil pan to measure the oil level, and judge the degree of oil dilution according to the increase and decrease of the oil level. Its defects are: an additional set of sensors and their supporting equipment are added, and the oil needs to be in a stable state. If the vehicle is driving, bumping or on a slope, the calculation will be inaccurate. Another defect is: there is a calculation method for diesel engine oil dilution in the existing similar technologies. This method considers the influence of rail pressure, post-injection, EGR rate, fuel volatilization and environmental pressure and temperature factors on oil dilution - this method is applicable to diesel engines, and there are certain differences in the structure and operating principle between diesel engines and gasoline engines, and its calculation method is not completely applicable to gasoline engines. Summary of the Invention

[0004] The purpose of the present invention is to provide a gasoline engine oil dilution detection method, a system and a vehicle thereof. The first technical problem to be solved is to calculate the degree of oil dilution according to the relevant characteristics of the engine, only considering the vehicle state information and environmental information, without the need to install other equipment.

[0005] Another technical problem to be solved by the present invention is to use the corrected oil dilution factor as a correction factor for systems such as fuel injection, emission and air-fuel ratio calculation, to avoid the situation that the EMS control effect is affected after excessive gasoline volatilizes in the engine oil.

[0006] The present invention provides the following solutions:

[0007] A gasoline engine oil dilution detection method includes an accumulator for calculating the degree of oil dilution and an integrator for calculating the degree of gasoline volatilization:

[0008] Collect vehicle status information and environmental information;

[0009] Detect whether the engine starting temperature is less than the first threshold and whether the engine speed exceeds the minimum speed, and decide whether to enable the accumulator;

[0010] Detect whether the engine water temperature is greater than or equal to the second threshold and whether the engine speed is greater than the minimum speed, and decide whether to enable the integrator;

[0011] Detect whether the output value of the integrator is greater than or equal to the third threshold, and decide whether to enable the accumulator;

[0012] Output the oil dilution degree factor.

[0013] Furthermore, the vehicle status information includes: engine starting temperature, engine speed exceeding the minimum speed flag, engine water temperature, air mass flow, intake manifold pressure, air flow correction factor, front oxygen sensor readiness flag, fuel cut-off flag, front oxygen sensor fault flag, front oxygen sensor test completion flag, and air-fuel ratio; the environmental information includes environmental atmospheric pressure.

[0014] Furthermore, if the engine starting temperature is less than the first threshold and the engine speed exceeds the minimum speed, enable the accumulator once;

[0015] If the engine water temperature rises to be greater than or equal to the second threshold, keep the integrator in the enabled state until the output value of the integrator is greater than or equal to the third threshold, and then enable the accumulator once; when the engine starting temperature is greater than or equal to the first threshold, the accumulator is in a state of waiting to be enabled until the output value of the integrator is greater than or equal to the third threshold, then enable the accumulator once, and at the next moment, reset the integrator.

[0016] Furthermore, the output of the accumulator is a power-down save amount, which is used to read this output amount when the ECU is powered on next time and use it as the output value representing the current oil dilution degree of the accumulator at the current moment, to remind the user of the current state of the oil, and to be used as a correction factor for the fuel injection, emission, and air-fuel ratio calculation systems.

[0017] Furthermore, when the output value of the integrator is greater than or equal to the third threshold, enable the accumulator once, and at the next moment, reset the integrator; or when the engine has no faults and the fuel cut-off lasts for a certain period of time, reset the accumulator, and at the next moment, reset the integrator.

[0018] Furthermore, the situation that the engine has no faults and the fuel cut-off lasts for a certain period of time specifically means: the engine is in the state where the fuel cut-off flag is set, the engine water temperature is greater than or equal to the second threshold, the front oxygen sensor readiness flag is set, the air-fuel ratio is greater than the fourth threshold, the front oxygen sensor test completion flag is set, and the front oxygen sensor fault flag is not set.

[0019] A gasoline engine oil dilution detection system includes an accumulator for calculating the degree of oil dilution and an integrator for calculating the degree of gasoline volatilization, and further includes:

[0020] A vehicle status information and environment information acquisition module for acquiring vehicle status information and environment information;

[0021] An engine starting temperature and speed detection module for detecting whether the engine starting temperature is less than a first threshold and whether the engine speed exceeds a minimum speed, and making a decision on whether to enable the accumulator;

[0022] An engine water temperature and speed detection module for detecting whether the engine water temperature is greater than or equal to a second threshold and whether the engine speed is greater than the minimum speed, and making a decision on whether to enable the integrator;

[0023] An integrator output value detection module for detecting whether the output value of the integrator is greater than or equal to a third threshold, and making a decision on whether to enable the accumulator;

[0024] An oil dilution degree output module for outputting an oil dilution degree factor.

[0025] An electronic device includes: a processor, a communication interface, a memory, and a communication bus. Among them, the processor, the communication interface, and the memory complete mutual communication through the communication bus; a computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of the method.

[0026] A computer-readable storage medium stores a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the method.

[0027] A vehicle is characterized by specifically including:

[0028] An electronic device for implementing a gasoline engine oil dilution detection method;

[0029] A processor, the processor runs a program. When the program runs, it executes the steps of the gasoline engine oil dilution detection method for the data output from the electronic device;

[0030] A storage medium for storing a program. When the program runs, it executes the steps of the gasoline engine oil dilution detection method for the data output from the electronic device.

[0031] The present invention has the following advantages compared with the prior art:

[0032] The present invention can calculate the oil dilution factor through an algorithm considering the influence of engine-related characteristics, ambient altitude and temperature, engine starting temperature, water temperature, intake air volume, etc. on oil dilution, without installing other equipment, and can simply, efficiently, and reliably calculate the degree of oil dilution.

[0033] The method for calculating the oil dilution factor of a gasoline engine provided by the present invention can be used to calculate the degree of oil dilution. This factor is the power-off storage amount, affected by each start and operation of the engine, continuously and long-term monitors the quality of the oil, and this factor can be used as a correction factor for systems such as fuel injection, emission, and air-fuel ratio calculation, avoiding the situation that the excessive evaporation of gasoline in the oil affects the EMS control effect. At the same time, it can also be used to prompt information to the user, enabling the user to quickly eliminate the influence of oil dilution by changing the usage scenario or working condition, and extending the oil usage cycle and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 is a flowchart of the oil dilution detection method for a gasoline engine.

[0036] Figure 2 is a block diagram of the oil dilution detection system for a gasoline engine.

[0037] Figure 3 is a method flowchart of the embodiment of the present invention in a specific application scenario.

[0038] Figure 4 is a block diagram of the system architecture of an electronic device. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0039] The following will clearly and completely describe the technical solutions of the present invention with reference to the drawings. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0040] As Figure 1 shown in the oil dilution detection method for a gasoline engine, the embodiment of the present invention includes an accumulator for calculating the degree of oil dilution and an integrator for calculating the degree of gasoline evaporation. The method flow specifically includes:

[0041] Step S1: Collect vehicle status information and environmental information;

[0042] Specifically, the vehicle status information includes: engine starting temperature, engine speed exceeding the minimum speed flag, engine water temperature, air mass flow, intake manifold pressure, air flow correction factor, front oxygen sensor readiness flag, fuel cut-off flag, front oxygen sensor fault flag, front oxygen sensor test completion flag, and air-fuel ratio; the environmental information includes environmental atmospheric pressure.

[0043] Step S2: Detect whether the engine starting temperature is less than the first threshold and whether the engine speed exceeds the minimum speed, and decide whether to enable the accumulator;

[0044] Step S3: Detect whether the engine water temperature is greater than or equal to the second threshold and whether the engine speed is greater than the minimum speed, and decide whether to enable the integrator;

[0045] Step S4: Detect whether the output value of the integrator is greater than or equal to the third threshold, and decide whether to enable the accumulator;

[0046] For steps S2 - S4, specifically, if the engine starting temperature is less than the first threshold and the engine speed exceeds the minimum speed, enable the accumulator once, and the input value is obtained by looking up Table 1 according to the engine starting temperature.

[0047] If the engine water temperature rises to be greater than or equal to the second threshold, keep the integrator in the enabled state until the output value of the integrator is greater than or equal to the third threshold, and then enable the accumulator once.

[0048] Exemplarily: When the engine starting temperature is greater than or equal to the first threshold, the accumulator is in a state of waiting to be enabled, and the enabling condition is determined by the integrator. As the engine runs, the engine water temperature gradually rises to be greater than or equal to the second threshold, then the integrator is continuously enabled until the output value of the integrator is greater than or equal to the third threshold, at which time the accumulator is enabled once, and the integrator is reset at the next moment.

[0049] The output of the accumulator is the power-off saved quantity, which is used to read this output quantity when the ECU is powered on next time and use it as the output value representing the current oil dilution degree of the accumulator at the current moment, to remind the user of the current state of the oil, and as a correction factor for the fuel injection, emission, and air-fuel ratio calculation systems.

[0050] Exemplarily, when the integrator output value is greater than or equal to the third threshold, the accumulator is enabled once, and at the next moment, the integrator is reset. Or when the engine has no fault and fuel cut-off lasts for a certain period of time, the accumulator is reset, that is, the accumulator output value returns to the initial value. At the next moment, the integrator is reset, that is, the integrator output value returns to the initial value. When the engine has no fault and fuel cut-off lasts for a certain period of time, specifically: the engine is in the state where the fuel cut-off flag is set, the engine water temperature is greater than or equal to the second threshold, the front oxygen sensor readiness flag is set, the air-fuel ratio is greater than the fourth threshold, the front oxygen sensor test completion flag is set, and the front oxygen sensor fault flag is not set.

[0051] Step S5: Output the oil dilution degree factor. In the embodiment of the present invention, the oil dilution degree factor represents the degree of oil dilution, which is used to remind the user of the current state of the oil and can be used as a correction factor for systems such as fuel injection, emission, and air-fuel ratio calculation.

[0052] For the method steps disclosed in the above embodiments, for the purpose of simple description, the method steps are expressed as a series of action combinations. However, those skilled in the art should know that the embodiments of the present invention are not limited by the described action sequence, because according to the embodiments of the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions involved are not necessarily essential for the embodiments of the present invention.

[0053] A flowchart or any process or method description described in other ways herein can be understood as: representing a module, segment, or part of code including one or more executable instructions for implementing a specific logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations, where the functions can be implemented not in the order shown or discussed, including in a substantially simultaneous manner according to the involved functions or in the reverse order, or by executing computer instructions according to program structures such as loops and branches to implement the corresponding functions, which can be understood by those skilled in the art when implementing the embodiments of the present invention.

[0054] As Figure 2 shown in the gasoline engine oil dilution detection system, including: an accumulator for calculating the degree of oil dilution and an integrator for calculating the degree of gasoline volatilization, further including:

[0055] A vehicle state information and environment information acquisition module for acquiring vehicle state information and environment information;

[0056] An engine starting temperature and speed detection module for detecting whether the engine starting temperature is less than the first threshold and whether the engine speed exceeds the minimum speed, and making a decision on whether to enable the accumulator;

[0057] The engine water temperature and speed detection module detects whether the engine water temperature is greater than or equal to the second threshold and whether the engine speed is greater than the minimum speed, and decides whether to enable the integrator;

[0058] The integrator output value detection module is used to detect whether the output value of the integrator is greater than or equal to the third threshold and decides whether to enable the accumulator;

[0059] The engine oil dilution degree output module is used to output the engine oil dilution degree factor.

[0060] It should be noted that although only some basic functional modules are disclosed in this embodiment, it does not mean that the composition of the system is limited to the above basic functional modules. On the contrary, what this embodiment intends to express is that based on the above basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with the prior art to form an infinite number of embodiments or technical solutions. That is to say, the system is open rather than closed, and it cannot be considered that the protection scope of the claims of the present invention is limited to the disclosed basic functional modules just because only individual basic functional modules are disclosed in this embodiment. At the same time, for the convenience of description, when describing the above device, it is divided into various units and modules according to functions and described separately. Of course, when implementing the present invention, the functions of each unit and module can be implemented in the same or multiple software and / or hardware.

[0061] The implementation manners of the system described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this implementation manner. Those of ordinary skill in the art can understand and implement it without creative work.

[0062] Such as Figure 3 The method flow of the embodiment of the present invention in a specific application scenario shown:

[0063] 1. Collect vehicle status and environmental information and output the engine oil dilution degree: The vehicle input status includes the engine starting temperature, the engine speed exceeding the minimum speed flag, the engine water temperature, the air mass flow, the intake manifold pressure, the air flow correction factor, the front oxygen sensor readiness flag, the fuel cut-off flag, the front oxygen sensor fault flag, the front oxygen sensor test completion flag, and the air-fuel ratio. The environmental information includes the ambient atmospheric pressure. The output engine oil dilution degree is the engine oil dilution factor.

[0064] 2. The main reason for engine oil dilution is that during the cold start of the engine, unvaporized gasoline adheres to the cylinder wall and mixes into the engine oil as the piston moves. Therefore, each cold start increases the degree of engine oil dilution. During vehicle operation, as the engine coolant temperature rises, the engine oil temperature also rises, and the gasoline mixed into the engine oil gradually volatilizes and enters the combustion chamber through the intake system for combustion, gradually reducing the degree of engine oil dilution. If the engine has no faults and fuel injection is interrupted for a certain period of time, the gasoline mixed into the engine oil can all volatilize and be fully burned in the combustion chamber, and the engine oil can recover from dilution.

[0065] 3. In step 2, the degree of engine oil dilution is calculated by an accumulator, and the output value of the accumulator is the engine oil dilution factor, indicating the degree of engine oil dilution. The single accumulation value of the accumulator is determined by the input, and the input value is determined by the engine starting temperature and the first threshold. If the engine starting temperature is less than the first threshold, the input is the value obtained by looking up Table 1 according to the engine starting temperature. The lower the engine starting temperature, the larger this value. And thereafter, the input to the accumulator is a value determined according to the relevant characteristics of the engine, generally negative, until the engine stops running.

[0066] If the engine starting temperature is greater than or equal to the first threshold, the input is a value determined according to the relevant characteristics of the engine, generally negative, until the engine stops running.

[0067] The enabling condition of the accumulator is that the engine starting temperature is less than the first threshold and the engine speed exceeds the minimum speed, or the output value of the intake air integrator is greater than or equal to the third threshold. The reset condition is that the engine has no faults and fuel injection is interrupted for a certain period of time.

[0068] The initial value of the accumulator is the minimum value of the accumulator output value and the value determined according to the engine characteristics. The output value of the accumulator has upper and lower limits. The lower limit is 0, and the upper limit is set according to the engine's own performance. The output value is the value saved when the ECU loses power. When the ECU powers on again, it will read this value and use it as the output value of the accumulator at the current moment. The output value represents the degree of engine oil dilution, which can be used to remind the user of the current state of the engine oil and can be used as a correction factor for systems such as fuel injection, emission, and air-fuel ratio calculation.

[0069] 4. In step 2, the degree of volatilization of the gasoline mixed into the engine oil is calculated by an intake air integrator. The single integration value of the integrator is determined by the integrator input, and the input value can be determined by the engine structure, operating conditions, and environment. It can be calculated based on factors such as ambient temperature, pressure, intake manifold pressure, air mass flow rate, and air mass flow rate through the PCV valve, or it can be obtained through sensors or calculated by the main charge model for air mass flow rate.

[0070] The integrator enabling condition is that the engine speed is greater than the minimum speed flag set and the engine water temperature is greater than or equal to the second threshold. The integrator reset condition is that the integrator output value is greater than or equal to the third threshold or the engine has no fault and fuel cut-off lasts for a certain period of time. The initial value of the integrator is determined according to the engine characteristics.

[0071] 5. The relationship between the accumulator and the integrator in steps 3 and 4 is as follows: If the integrator output value is greater than or equal to the third threshold, the accumulator is enabled once. The accumulator input is a value determined according to the relevant engine characteristics. The accumulator output value decreases, and the integrator is reset at the next moment, and the integrator output value returns to the initial value.

[0072] 6. In steps 2, 3, and 4, the engine has no fault and fuel cut-off (hereinafter referred to as fuel cut-off) lasts for a certain period of time, which means that the engine is in the state where the fuel cut-off flag is set, the engine water temperature is greater than or equal to the second threshold, the front oxygen sensor readiness flag is set, the air-fuel ratio is greater than the fourth threshold, the front oxygen sensor test completion flag is set, and the front oxygen sensor fault flag is not set, and the above states last for a certain period of time.

[0073] 7. The first threshold, the second threshold, the third threshold, the fourth threshold, Table 1, Table 2, the accumulator input value, the initial value, the integrator input value, and the initial value in steps 3, 4, 5, and 6 are all determined according to the relevant engine characteristics.

[0074] In the embodiments of the present invention, those skilled in the art can understand that the first to fourth thresholds, values such as Table 1 and Table 2 can be empirical values or prior values and other data, or can also be data in the training set and test set of the data model. Those skilled in the art, relying on the general technical knowledge they have mastered in this field, combined with the common knowledge of gasoline engines, vehicle structures, and vehicle control, combined with the calculation methods, reference books, technical manuals, computer databases, etc. of the existing technology, can obtain the first to fourth thresholds, values such as Table 1 and Table 2. The specific values are not elaborated here due to space limitations.

[0075] The main calculation methods and logics of the embodiments of the present invention are summarized as follows:

[0076] When the engine starting temperature is less than the first threshold and the engine speed exceeds the minimum speed, the accumulator is enabled once, and the input value is obtained by looking up Table 1 according to the engine starting temperature. If the engine continues to run normally, the enabling condition of the accumulator is determined by the integrator. As the engine runs, the engine water temperature gradually rises to be greater than or equal to the second threshold, then the integrator is continuously enabled until the integrator output value is greater than or equal to the third threshold, the accumulator is enabled once, and at the next moment, the integrator is reset, and the integrator output value returns to the initial value.

[0077] When the engine starting temperature is greater than or equal to the first threshold, the accumulator is in a state to be enabled, and the enabling condition is determined by the integrator. As the engine runs, the engine water temperature gradually rises to be greater than or equal to the second threshold, then the integrator is continuously enabled until the output value of the integrator is greater than or equal to the third threshold, the accumulator is enabled once, and at the next moment the integrator is reset and the output value of the integrator resumes to the initial value.

[0078] When the engine is running, if the engine is in a fuel cut-off state and lasts for a certain period of time, the accumulator is reset, the output value is the initial value, and at the next moment the integrator is reset and the output value is the initial value.

[0079] As Figure 4 shown, the embodiments of the present invention also disclose an electronic device, a storage medium and a vehicle corresponding to the gasoline engine oil dilution detection method and system:

[0080] An electronic device includes: a processor, a communication interface, a memory and a communication bus, wherein,

[0081] The processor, the communication interface and the memory complete mutual communication through the communication bus; a computer program is stored in the memory, and when the computer program is executed by the processor, the processor is enabled to execute the steps of the gasoline engine oil dilution detection method.

[0082] A computer-readable storage medium stores a computer program executable by an electronic device, and when the computer program runs on the electronic device, the electronic device is enabled to execute the steps of the gasoline engine oil dilution detection method.

[0083] The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components.

[0084] The communication bus mentioned in the above electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. This communication bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of convenience in representation, only a thick line is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0085] The electronic device includes a hardware layer, an operating system layer running on the hardware layer, and an application layer running on the operating system. The hardware layer includes hardware such as a Central Processing Unit (CPU), a Memory Management Unit (MMU), and memory. The operating system can be any one or more computer operating systems that implement the control of the electronic device through a process. For example, the Linux operating system, the Unix operating system, the Android operating system, the iOS operating system, or the Windows operating system, etc. And in the embodiments of the present invention, the electronic device can be a handheld device such as a smart phone or a tablet computer, or an electronic device such as a desktop computer or a portable computer. There is no particular limitation in the embodiments of the present invention.

[0086] The execution subject of the control of the electronic device in the embodiments of the present invention can be the electronic device, or a functional module in the electronic device that can call and execute a program. The electronic device can obtain the firmware corresponding to the storage medium, and the firmware corresponding to the storage medium is provided by the supplier. The firmware corresponding to different storage media can be the same or different, and this is not limited herein. After the electronic device obtains the firmware corresponding to the storage medium, it can write the firmware corresponding to the storage medium into the storage medium. Specifically, it burns the firmware corresponding to the storage medium into the storage medium. The process of burning the firmware into the storage medium can be implemented by the prior art and will not be elaborated in the embodiments of the present invention.

[0087] The electronic device can also obtain the reset command corresponding to the storage medium, and the reset command corresponding to the storage medium is provided by the supplier. The reset commands corresponding to different storage media can be the same or different, and this is not limited herein.

[0088] At this time, the storage medium of the electronic device is the storage medium written with the corresponding firmware. The electronic device can respond to the reset command corresponding to the storage medium in the storage medium written with the corresponding firmware, so that the electronic device resets the storage medium written with the corresponding firmware according to the reset command corresponding to the storage medium. The process of resetting the storage medium according to the reset command can be implemented by the prior art and will not be elaborated in the embodiments of the present invention.

[0089] The present invention also discloses a vehicle, specifically including:

[0090] An electronic device for implementing the gasoline engine oil dilution detection method;

[0091] A processor that runs a program, and when the program runs, executes the steps of the gasoline engine oil dilution detection method for the data output from the electronic device;

[0092] A storage medium for storing a program, and when the program runs, executes the steps of the gasoline engine oil dilution detection method for the data output from the electronic device.

[0093] Those skilled in the art of the present technology can understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of those of ordinary skill in the art to which the present invention belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined.

[0094] It should be noted that certain terms are used in this specification and the claims to refer to specific elements. Those skilled in the art should understand that different manufacturers and producers may use different nouns to refer to the same element. This specification and the claims do not use the difference in nouns as a way to distinguish elements, but use the difference in the functions of elements as the criterion for distinction.

[0095] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0096] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement it. When the combination of technical solutions appears to be contradictory or unable to be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0097] In addition, in each embodiment of the present invention, the functional modules can be integrated together to form an independent part, or each module can exist alone, or two or more modules can be integrated to form an independent part.

[0098] Those skilled in the art can understand that the modules in the devices in the embodiments can be adaptively changed and arranged in one or more devices different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and in addition, they can be divided into multiple sub-modules or sub-units or sub-components. Except that at least some of such features and / or processes or units are mutually exclusive, any combination can be adopted to combine all the features disclosed in this specification (including the corresponding claims, abstract and drawings) and all the processes or units of any method or device so disclosed. Unless otherwise explicitly stated, each feature disclosed in this specification (including the corresponding claims, abstract and drawings) can be replaced by an alternative feature that provides the same, equivalent or similar purpose.

[0099] In addition, those skilled in the art can understand that although some of the embodiments described herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present invention and forms different embodiments. For example, in the following claims, any one of the claimed embodiments can be used in any combination.

[0100] 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 to be within the scope described in this specification.

[0101] The terms "comprising" or "including" mentioned in the specification and claims are open-ended terms, so they should be understood as "including but not limited to". The preferred embodiments of implementing the present invention will be described hereinafter, but the description is for the purpose of the general principles of the specification and is not used to limit the scope of the present invention. The protection scope of the present invention shall be defined by the appended claims.

[0102] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0103] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gasoline engine oil dilution detection method, including an accumulator for calculating the degree of oil dilution and an integrator for calculating the degree of gasoline volatilization, characterized in that: collect vehicle status information and environmental information; detect whether the engine starting temperature is less than a first threshold. If the engine starting temperature is less than the first threshold and the engine speed exceeds the minimum speed, then decide to enable the accumulator; detect whether the engine water temperature is greater than or equal to a second threshold. If the engine water temperature is greater than or equal to the second threshold and the engine speed is greater than the minimum speed, then decide to enable the integrator; detect whether the output value of the integrator is greater than or equal to a third threshold. If the integrator output value is greater than or equal to the third threshold, then decide to enable the accumulator; output the oil dilution degree factor.

2. The gasoline engine oil dilution detection method according to claim 1, characterized in that, the vehicle status information includes: engine starting temperature, engine speed exceeding the minimum speed flag, engine water temperature, air mass flow, intake manifold pressure, air flow correction factor, front oxygen sensor readiness flag, fuel cut-off flag, front oxygen sensor fault flag, front oxygen sensor test completion flag and air-fuel ratio; the environmental information includes environmental atmospheric pressure.

3. The gasoline engine oil dilution detection method according to claim 1, characterized in that, if the engine starting temperature is less than the first threshold and the engine speed exceeds the minimum speed, then enable the accumulator once; if the engine water temperature rises to be greater than or equal to the second threshold, then keep the integrator in a continuously enabled state until the integrator output value is greater than or equal to the third threshold, and then enable the accumulator once; when the engine starting temperature is greater than or equal to the first threshold, the accumulator is in a state of waiting to be enabled until the integrator output value is greater than or equal to the third threshold, then enable the accumulator once, and at the next moment, the integrator is reset.

4. The gasoline engine oil dilution detection method according to claim 3, characterized in that, the output of the accumulator is a power-off saved quantity, which is used to read this output quantity when the ECU is powered on next time and use it as the output value representing the current oil dilution degree of the accumulator, to remind the user of the current state of the oil, and as a correction factor for the fuel injection, emission, and air-fuel ratio calculation systems.

5. The gasoline engine oil dilution detection method according to claim 3, characterized in that, when the integrator output value is greater than or equal to the third threshold, enable the accumulator once, and at the next moment, the integrator is reset, or when the engine has no faults and the fuel cut-off lasts for a certain time, reset the accumulator, and at the next moment, the integrator is reset.

6. The gasoline engine oil dilution detection method according to claim 5, characterized in that, when the engine has no faults and the fuel cut-off lasts for a certain time, specifically: the engine is in a state where the fuel cut-off flag is set, the engine water temperature is greater than or equal to the second threshold, the front oxygen sensor readiness flag is set, the air-fuel ratio is greater than a fourth threshold, the front oxygen sensor test completion flag is set, and the front oxygen sensor fault flag is not set.

7. A gasoline engine oil dilution detection system, including an accumulator for calculating the degree of oil dilution and an integrator for calculating the degree of gasoline volatilization, It is characterized in that further comprising: a vehicle state information and environment information acquisition module for acquiring vehicle state information and environment information; an engine starting temperature and speed detection module for detecting whether the engine starting temperature is less than a first threshold value. If the engine starting temperature is less than the first threshold value and the engine speed exceeds the minimum speed, it is determined to enable the accumulator; an engine water temperature and speed detection module for detecting whether the engine water temperature is greater than or equal to a second threshold value. If the engine water temperature is greater than or equal to the second threshold value and the engine speed is greater than the minimum speed, it is determined to enable the integrator; an integrator output value detection module for detecting whether the output value of the integrator is greater than or equal to a third threshold value. If the integrator output value is greater than or equal to the third threshold value, it is determined to enable the accumulator; an engine oil dilution degree output module for outputting an engine oil dilution degree factor.

8. An electronic device, It is characterized in that comprising: a processor, a communication interface, a memory, and a communication bus. Among them, the processor, the communication interface, and the memory complete mutual communication through the communication bus; a computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, It is characterized in that it stores a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the method according to any one of claims 1 to 6.

10. A vehicle, It is characterized in that specifically comprising: an electronic device for implementing the gasoline engine oil dilution detection method according to any one of claims 1 to 6; a processor, the processor runs a program. When the program runs, it executes the steps of the gasoline engine oil dilution detection method according to any one of claims 1 to 6 for the data output from the electronic device; a storage medium for storing a program. When the program runs, it executes the steps of the gasoline engine oil dilution detection method according to any one of claims 1 to 6 for the data output from the electronic device.

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