CN110988311A - Vehicle engine oil life diagnosis method and device, vehicle and storage medium - Google Patents
Vehicle engine oil life diagnosis method and device, vehicle and storage medium Download PDFInfo
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- CN110988311A CN110988311A CN201910980254.7A CN201910980254A CN110988311A CN 110988311 A CN110988311 A CN 110988311A CN 201910980254 A CN201910980254 A CN 201910980254A CN 110988311 A CN110988311 A CN 110988311A
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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- G01N33/26—Oils; viscous liquids; paints; inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
Abstract
The invention discloses a method and a device for diagnosing the service life of vehicle engine oil, a vehicle and a storage medium, belonging to the technical field of automobiles, wherein the method comprises the steps of obtaining engine oil parameters, wherein the engine oil parameters comprise dielectric constant, kinematic viscosity and accumulated running hours; determining the soot content, the oxidation degree, the fuel oil content, the acid value increment relative to the initial acid value and the kinematic viscosity variation relative to the initial kinematic viscosity of the engine oil in the engine; and diagnosing the service life of the engine oil according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result. Compared with the prior art, the service life of the engine oil is diagnosed according to five indexes of soot content, oxidation degree, fuel oil content, acid value increment and kinematic viscosity variation, and the problems that the aging rate of the technical index of oil change is difficult to effectively, accurately and comprehensively evaluate the quality of the engine oil on line and the misdiagnosis rate is high due to the fact that data measured by an oil product sensor is utilized in the prior art are solved.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a method and a device for diagnosing the service life of vehicle engine oil, a vehicle and a storage medium.
Background
With the continuous development of science and technology, the proportion of GDP occupied by the domestic automobile industry is increased year by year, and the status of national economy is gradually improved. The continuous increase of the automobile occupancy rate has a series of problems about automobile maintenance, the engine oil plays roles in lubricating, cleaning, cooling, sealing, buffering impact load and the like for the work of an automobile engine, and the scientific use of the engine oil is an important guarantee for reducing the power consumption of the engine, reducing the friction and wear and prolonging the service life of the engine. The engine oil of the engine is affected by high temperature, vibration, friction and the like in the using process and is gradually aged, and the function of the engine oil is gradually weakened. Therefore, the quality of the engine oil is accurately monitored, the time for replacing aged engine oil is very important, and if the engine oil is replaced early, the engine oil is wasted, and the benefit of a vehicle owner is damaged; if the oil is changed late, the engine is easily damaged, the service life of the engine is influenced, and even accidents are caused.
In order to solve the above problems, the conventional online monitoring system diagnoses the aging rate of the oil change technical index through data measured by an oil product sensor, so as to estimate the service life of the engine oil, but the aging rates of various engine oils can be obtained due to different external environments and road conditions, so as to estimate the service lives of various engine oils, so that the effective, accurate and comprehensive online evaluation of the quality of the engine oil is difficult to realize, and the misdiagnosis rate is high.
Disclosure of Invention
The invention aims to provide a method and a device for diagnosing the service life of vehicle engine oil, a vehicle and a storage medium, and aims to solve the problems that an online monitoring system in the prior art is difficult to realize effective, accurate and comprehensive online evaluation of the quality of lubricating oil and has high misdiagnosis rate.
In a first aspect, an embodiment of the present invention provides a vehicle oil life diagnostic method, including:
obtaining engine oil parameters, wherein the engine oil parameters comprise dielectric constant, kinematic viscosity and accumulated running hours;
determining the soot content, the oxidation degree, the fuel oil content, the acid value increment relative to the initial acid value and the kinematic viscosity variation relative to the initial kinematic viscosity of the engine oil in the engine;
and diagnosing the service life of the engine oil according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result.
Further, determining the soot content, the oxidation degree, the fuel oil content, the increase of the acid value relative to the initial acid value and the change amount of the kinematic viscosity relative to the initial kinematic viscosity of the engine oil in the engine comprises:
the calculation formula of the soot content is as follows: c0.5 (150 ε -10.75 ν -160) e0.5-17.5；
The calculation formula of the oxidation degree is as follows: ox 30 epsilon-2 (150 epsilon-10.75 nu-160) e0.5-2.6；
The calculation formula of the fuel oil content is as follows: d ═ k × C;
the calculation formula of the increase of the acid value is as follows: Δ TAN ═ TAN-TAN0Wherein TAN ═ 2-0.1125 × T2+1.1 × T;
the calculation formula of the kinematic viscosity variation is as follows: Δ ν ═ ν - ν0|；
Wherein T is the cumulative operating hours of the engine oil/100 h, Ox is the degree of oxidation of the engine oil, and is A/mm, C is the soot content of the engine oil, and is kg/100kg, d is the fuel content in the engine oil, and is kg/100kg, TAN is the acid value of the engine oil0The initial acid value of the engine oil is mgKOH/g, k is a constant and takes the value of 0.5, epsilon is a dielectric constant, v is the kinematic viscosity of the engine oil at 40 ℃, and the unit is mm/s2，ν0Is the initial kinematic viscosity of the engine oil; TAN0Is the initial acid number of the engine oil.
Further, diagnosing the service life of the engine oil according to the soot content, the oxidation degree, the fuel oil content, the acid value increase and the kinematic viscosity change to obtain a diagnosis result, comprising:
if Δ v > 20% v0Any one of Ox > 2, C > 3, d > 5 and delta TAN > 2.5 is established, the engine oil is determined to need to be replaced, and an alarm is given.
Further, obtaining an engine oil liquid level of engine oil in the engine, and prompting a user to replenish the engine oil when the engine oil liquid level is smaller than a first preset liquid level and larger than a second preset liquid level; and when the engine oil liquid level is less than or equal to a second preset liquid level, limiting the rotating speed of the engine and giving an alarm.
Further, the remaining maintenance mileage of the vehicle is obtained, when the remaining maintenance mileage is smaller than a first preset mileage and larger than a second preset mileage, a user is prompted to change engine oil, and when the remaining maintenance mileage is smaller than or equal to the second preset mileage, the engine speed is limited, and an alarm is given.
In a second aspect, an embodiment of the present invention further provides a vehicle oil life diagnostic apparatus, including:
the engine oil parameter acquisition module is used for acquiring engine oil parameters, wherein the engine oil parameters comprise dielectric constant, kinematic viscosity and accumulated running hours;
a soot content determination module for determining a soot content of engine oil in an engine;
the oxidation degree determining module is used for determining the oxidation degree of engine oil in the engine;
a fuel content determination module to determine a fuel content in engine oil in an engine;
the acid value increment determining module is used for determining the acid value increment of the engine oil in the engine;
the engine oil control device comprises a kinematic viscosity variation determining module, a control module and a control module, wherein the kinematic viscosity variation determining module is used for determining the kinematic viscosity variation of engine oil in an engine;
and the engine oil life diagnosis module is used for diagnosing the engine oil life according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result.
Further, the soot content determination module is specifically configured to input the dielectric constant and the kinematic viscosity into a preset soot content model, and output a soot content from the soot content model as a soot content of the engine oil in the engine.
Further, the oxidation degree determination module is specifically configured to input the dielectric constant and the kinematic viscosity into a preset oxidation degree model, and output the oxidation degree of the engine oil from the oxidation degree model as the oxidation degree of the engine oil in the engine.
In a third aspect, an embodiment of the present invention provides a vehicle, including an engine, further including: a driving controller is arranged on the vehicle body,
the dielectric constant sensor is used for detecting the dielectric constant of the engine oil and sending the dielectric constant to the traveling controller;
the viscosity sensor is used for detecting the kinematic viscosity of the engine oil and sending the kinematic viscosity to the driving controller;
the running controller acquires the accumulated running hours of the engine oil through the timing device;
the instrument panel is used for alarming when the engine oil needs to be replaced;
a memory for storing one or more programs;
when one or more of the programs are executed by the running vehicle controller, the running vehicle controller is caused to implement the vehicle oil life diagnosis method according to the first aspect.
In a fourth aspect, the embodiment of the present invention further provides a medium, on which a computer program is stored, and the computer program, when executed by a vehicle controller, implements the vehicle oil life diagnosis method according to the first aspect.
The invention has the beneficial effects that:
according to the method, the device, the vehicle and the storage medium for diagnosing the service life of the vehicle engine oil, engine oil parameters are obtained, wherein the engine oil parameters comprise dielectric constant, kinematic viscosity and accumulated running hours; determining the soot content, the oxidation degree, the fuel oil content, the acid value increment relative to the initial acid value and the kinematic viscosity variation relative to the initial kinematic viscosity of the engine oil in the engine; and diagnosing the service life of the engine oil according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result. Compared with the prior art, the service life of the engine oil is diagnosed according to five indexes of soot content, oxidation degree, fuel oil content, acid value increment and kinematic viscosity variation, and the problems that the aging rate of the technical index of oil change is difficult to effectively, accurately and comprehensively evaluate the quality of the engine oil on line and the misdiagnosis rate is high due to the fact that data measured by an oil product sensor is utilized in the prior art are solved.
Drawings
FIG. 1 is a flow chart of a method for diagnosing engine oil life of a vehicle according to an embodiment of the present invention;
FIG. 2 is a block diagram of a vehicle oil life diagnosing apparatus according to a second embodiment of the present invention;
fig. 3 is a structural diagram of a vehicle according to a third embodiment of the present invention.
In the figure:
210. an engine oil parameter acquisition module; 311. a soot content determination module; 312. an oxidation degree determination module; 313. A fuel content determination module; 314. an acid value increase amount determination module; 315. a kinematic viscosity variation determination module; 410. an engine oil life diagnostic module;
510. a driving controller; 520. a memory; 530. a viscosity sensor; 540. a dielectric constant sensor; 550. A timing device; 560. an engine; 570. and (4) an instrument panel.
Detailed Description
In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Example one
Fig. 1 is a flowchart of a vehicle oil life diagnosis method according to an embodiment of the present invention, where the embodiment is applicable to vehicle oil life diagnosis, and the method may be executed by a vehicle oil life diagnosis device, which may be implemented in software and/or hardware and integrated in a vehicle, and specifically, the method includes the following steps:
and S110, obtaining engine oil parameters.
The engine oil parameters comprise dielectric constant, kinematic viscosity and accumulated operation hours of the engine. The engine oil plays roles of lubricating, cleaning, cooling, sealing, buffering impact load and the like for the work of the engine 560, and various performances of the engine oil are accurately and timely evaluated, so that the engine oil is an important link in the working process. The engine oil is a complex mixture which can be regarded as a weak-polarity liquid electrolyte, the dielectric constant is about 2.0, the main functions of the engine oil are electronic displacement type polarization and orientation polarization, the molecular polarity of oxidized engine oil changes, the purity of polluted engine oil changes, the number of external pollutants increases along with the accumulation of oxidation products and thermal degradation products in the engine oil, the polarized molecules in the engine oil also continuously increase, the dielectric constant of the engine oil changes, meanwhile, due to friction and abrasion, the dielectric constant of the engine oil also changes due to abraded metal examples and other conductive cavity compounds, and the mass fraction of the polarized components of the engine oil directly influences the size of the dielectric constant. Therefore, the performance and life of the oil can be evaluated by monitoring the dielectric constant of the oil. The kinematic viscosity of the engine oil reflects the internal friction of the engine oil, which is an index for indicating the oiliness and fluidity of the oil. After the engine oil of the automobile engine 560 is used for a period of time, the kinematic viscosity of the engine oil changes due to the mixing of impurities and the change of the self property, so that the lubricating capability of the engine 560 is influenced, if the engine oil is diluted and the viscosity of the engine oil is relatively low and a vehicle is still driven to run, the lubricating capability of the engine 560 is directly reduced, and parts of the engine 560 are abraded, so that the performance and the service life of the engine oil can be evaluated by monitoring the kinematic viscosity.
S120, determining the soot content, the oxidation degree, the fuel oil content, the acid value increment relative to the initial acid value and the kinematic viscosity variation relative to the initial kinematic viscosity of the engine oil in the engine 560.
Specifically, it can be understood that the soot content, the oxidation degree, the acidity value, and the fuel content and kinematic viscosity are important factors affecting the service life of the engine oil, and thus the service life of the engine oil can be diagnosed by the soot content, the oxidation degree, the acidity value, the fuel content, and the kinematic viscosity.
The soot content is the amount of soot that enters the engine oil after engine 560 is produced. In practice, soot generated by the engine 560 is partially introduced into the engine oil and partially introduced into the fuel particulate filter. It is understood that soot entering the oil affects the dielectric constant and viscosity of the oil, and thus the dielectric constant and viscosity of the oil are detected by the sensor, and then the content of the soot entering the oil is determined based on the dielectric constant and the kinematic viscosity, and the embodiment does not limit the type and model of the sensor for detecting the dielectric constant as long as the measurement of the dielectric constant is achieved, and the embodiment does not limit the type and model of the sensor for detecting the kinematic viscosity as long as the measurement of the kinematic viscosity is achieved. The dielectric constant and viscosity are then input into a predetermined soot content model from which the soot content is output. In this example, the soot content model is a mathematical model reflecting the relationship between dielectric constant and viscosity and soot content, and specifically, the mathematical model is represented by the formula: c0.5 (150 ε -10.75 ν -160) e0.5-17.5, wherein epsilon is dielectric constant, v is kinematic viscosity of the oil at 40 ℃, and the unit is mm/s2。
The engine oil has a cooling function in addition to a lubricating function in the working process, the engine oil can absorb heat and increase the temperature after flowing through a high-temperature part in the engine 560, the high temperature can obviously improve the oxidation rate of the turbine oil, the gasoline is subjected to accelerated depreciation, the color of the engine oil is deepened after oxidation, and insoluble matters are generated, so that the viscosity of the engine oil is increased, and the dielectric constant of the engine oil is influenced, so that the oxidation degree of the engine oil can be determined according to the dielectric constant and the kinematic viscosity, the dielectric constant and the kinematic viscosity are input into a predetermined oxidation degree model, and the oxidation degree of the engine oil is output by the oxidation degree model. In this embodiment, the oxidation degree model is a mathematical model reflecting the relationship between the dielectric constant and the kinematic viscosity and the oxidation degree of the engine oil, and specifically, the mathematical model is represented by the formula: ox 30 epsilon-2 (150 epsilon-10.75 nu-160) e0.5-2.6, and Ox is the oxidation degree of engine oil and the unit is A/mm.
The organic acid of the engine oil in the working process is mainly generated by autooxidation,when the content of the organic acid is low, the corrosion effect on metal is not great, but when the content of the organic acid is high, the corrosion effect on bearing materials (nonferrous metal and alloy thereof) is high, and therefore the engine oil acid value needs to be in a certain range. The acid number of the engine oil can be output from the acid number model by inputting the cumulative number of operating hours into the acid number model. In this embodiment, the acid number model is a mathematical model reflecting a relationship between the cumulative operating hours of the engine oil and the acid number, specifically, the mathematical model is represented by a formula TAN of 2 to 0.1125T 2+ 1.1T, where TAN is the engine oil acid number and T is the cumulative operating hours of the engine oil/100 h, the acid number of the engine oil is calculated after the engine oil is operated for a period of time, and is compared with the initial acid number of the engine oil to obtain an increase Δ TAN in the acid number of the engine oil, and the increase Δ TAN in the acid number is calculated by: Δ TAN ═ TAN-TAN0，TAN0The initial acid value of the engine oil is mgKOH/g, and can be obtained through the quality parameters of the engine oil.
During the operation of the engine 560, a certain amount of fuel may be diluted into the engine oil of the engine 560, and when the amount of fuel in the engine oil is large, the performance of the engine oil may be affected, so that the amount of fuel in the engine oil may be used to diagnose the life of the engine oil. The fuel content in the engine oil can be calculated by the soot content, specifically, in the embodiment, the calculation formula of the fuel content is: d is fuel content in kg/100kg, k is a constant with a value of 0.5, and C is soot content.
After the engine oil works for a period of time, the kinematic viscosity of the engine oil can be changed, so that the change of the kinematic viscosity of the engine oil can be used for evaluating the service life of the engine oil, the kinematic viscosity of the engine oil after the engine oil works for a period of time is obtained through a viscosity sensor, and is compared with the initial kinematic viscosity of the engine oil to obtain the kinematic viscosity change delta v, and the delta v is | v-v0L, v is the kinematic viscosity of the engine oil at 40 ℃, v0Is the initial kinematic viscosity of the engine oil.
S130, diagnosing the service life of the engine oil according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result.
It can be understood that the engine oilWhen the performance is better, the soot content, the oxidation degree, the fuel oil content, the acid value increment and the viscosity variation are all required to be in a certain range, therefore, if the Delta v is more than 20 percent v0If any one of Ox > 2, C > 3, d > 5 and delta TAN > 2.5 is established, the engine oil is determined to be required to be replaced, namely the service life of the engine oil is exhausted, the engine oil is required to be replaced, an alarm is given, and a user is prompted to replace the engine oil in time.
Further, the method for diagnosing the service life of the vehicle engine oil provided by the embodiment further includes acquiring an engine oil level of the engine oil in the engine 560, and prompting a user to replenish the engine oil when the engine oil level is smaller than a first preset level and larger than a second preset level; and when the engine oil liquid level is less than or equal to a second preset liquid level, limiting the rotating speed of the engine 560 and giving an alarm. It can be understood that, accessible level sensor comes real-time detection machine oil liquid level, if the machine oil liquid level is less than first predetermined liquid level and is greater than the second when predetermineeing the liquid level, then it is not enough to indicate this moment machine oil volume, need replenish, accessible panel board 570 reminds the user this moment, if the machine oil liquid level is the predetermined liquid level of second, then indicate that the volume of machine oil has can't satisfy the demand such as lubrication, cooling, driving controller 510 can restrict the rotational speed of engine 560 this moment, the vehicle gets into the limp state, and report to the police through panel board 570, the suggestion user in time supplyes or changes machine oil. The second preset liquid level is smaller than the first preset liquid level, and both the second preset liquid level and the first preset liquid level can be set according to actual needs.
Further, the method for diagnosing the engine oil life of the vehicle according to the embodiment further includes obtaining the remaining maintenance mileage of the vehicle, prompting the user to change the engine oil when the remaining maintenance mileage is less than the first preset mileage and greater than the second preset mileage, and limiting the rotation speed of the engine 560 and giving an alarm when the remaining maintenance mileage is less than or equal to the second preset mileage; the first preset mileage is greater than the second preset mileage. It is understood that the maintenance cycle of the vehicle is determined according to the quality of the used oil and parts, and if the quality of the oil is better, the maintenance mileage is longer, and if the quality of the oil is worse, the maintenance mileage is shorter. Therefore, the shape driving range of the vehicle after engine oil replacement is obtained, the remaining maintenance range is calculated according to the driving range and is compared with the first preset range and the second preset range, and when the remaining maintenance range is smaller than the first preset range and larger than the second preset range, the user is prompted to replace the engine oil in time. And when the remaining maintenance mileage is less than or equal to a second preset mileage, limiting the rotating speed of the engine 560 and giving an alarm through the instrument panel 570. The first preset mileage and the second preset mileage can be set according to actual needs, for example, the first preset mileage is 100km, and the second preset mileage is 20 km.
According to the method for diagnosing the service life of the vehicle engine oil, engine oil parameters are obtained, wherein the engine oil parameters comprise dielectric constant, kinematic viscosity and accumulated running hours; determining the soot content, the oxidation degree, the fuel oil content, the increase of the acid value relative to the initial acid value and the change amount of the kinematic viscosity relative to the initial kinematic viscosity of the engine oil in the engine 560; and diagnosing the service life of the engine oil according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result. Compared with the prior art, the service life of the engine oil is diagnosed according to five indexes of soot content, oxidation degree, fuel oil content, acid value increment and kinematic viscosity variation, and the problems that the aging rate of the technical index of oil change is difficult to effectively, accurately and comprehensively evaluate the quality of the engine oil on line and the misdiagnosis rate is high due to the fact that data measured by an oil product sensor is utilized in the prior art are solved.
Example two
Fig. 2 is a structural diagram of a vehicle oil life diagnosis device according to a second embodiment of the present invention, which can execute the vehicle oil life diagnosis method according to the second embodiment, specifically, the device includes:
an engine oil parameter obtaining module 210 for obtaining engine oil parameters, wherein the engine oil parameters include a dielectric constant, a kinematic viscosity, and an accumulated operating hour;
a soot content determination module 311 for determining a soot content of engine oil in the engine 560;
an oxidation level determination module 312 to determine an oxidation level of the engine oil in the engine 560;
an in-oil fuel content determination module 313 for determining a fuel content in oil in the engine 560;
an acid number increase determination module 314 to determine an increase in acid number of engine oil in engine 560;
a kinematic viscosity change determination module 315 to determine a change in kinematic viscosity of the oil in the engine 560;
and the engine oil life diagnosis module 410 is used for diagnosing the engine oil life according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result.
According to the method for diagnosing the service life of the vehicle engine oil, engine oil parameters are obtained, wherein the engine oil parameters comprise dielectric constant, kinematic viscosity and accumulated running hours; determining the soot content, the oxidation degree, the fuel oil content, the increase of the acid value relative to the initial acid value and the change amount of the kinematic viscosity relative to the initial kinematic viscosity of the engine oil in the engine 560; and diagnosing the service life of the engine oil according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result. Compared with the prior art, the service life of the engine oil is diagnosed according to five indexes of soot content, oxidation degree, fuel oil content, acid value increment and kinematic viscosity variation, and the problems that the aging rate of the technical index of oil change is difficult to effectively, accurately and comprehensively evaluate the quality of the engine oil on line and the misdiagnosis rate is high due to the fact that data measured by an oil product sensor is utilized in the prior art are solved.
On the basis of the above embodiment, the oil parameter obtaining module 210 includes:
a dielectric constant acquisition unit for acquiring the dielectric constant of the oil in the engine 560 detected by the dielectric constant sensor 540;
a kinematic viscosity acquisition unit for acquiring kinematic viscosity of the oil in the engine 560 detected by the oil viscosity sensor 530;
and an accumulated operating hour acquiring unit, configured to acquire the accumulated operating hours of the engine oil in the engine 560 detected by the timing device 550.
On the basis of the above embodiment, the soot content determining module 311 is specifically configured to input the dielectric constant and the kinematic viscosity into a preset soot content model, and output the soot content from the soot content model as the soot content of the engine oil in the engine 560.
On the basis of the above embodiment, the oxidation degree determining module 312 is specifically configured to input the dielectric constant and the kinematic viscosity into a preset oxidation degree model, and output the oxidation degree as the oxidation degree of the engine oil in the engine 560 by the oxidation degree model.
On the basis of the above embodiment, the fuel content determining module 31 is specifically configured to input the soot content into a preset fuel content model, and output the fuel content from the fuel content model as the fuel content of the engine oil in the engine 560.
On the basis of the foregoing embodiment, the acid number increase determining module 314 is specifically configured to input the cumulative operating hours into a preset acid number model, output an acid number from the acid number model as an engine oil acid number of the engine oil in the engine 560, and then subtract the initial acid number of the engine oil to obtain an acid number increase of the engine oil.
On the basis of the foregoing embodiment, the kinematic viscosity variation determining module 315 is specifically configured to calculate a kinematic viscosity variation of the oil in the engine 560, and obtain the kinematic viscosity variation of the oil by subtracting the initial kinematic viscosity of the oil from the kinematic viscosity of the oil detected by the oil viscosity sensor.
The vehicle oil diagnosis device provided by the second embodiment of the invention can be used for executing the vehicle oil diagnosis method provided by the second embodiment, and has corresponding functions and beneficial effects.
EXAMPLE III
Fig. 3 is a structural diagram of a vehicle according to the present invention. Specifically, referring to fig. 3, the vehicle includes a vehicle controller 510, a memory 520, a dielectric constant sensor 540, a viscosity sensor 530, a timing device 550, an engine 560, and an instrument panel 570, and the vehicle controller 510, the memory 520, the dielectric constant sensor 540, the viscosity sensor 530, the timing device 550, the engine 560, and the instrument panel 570 may be connected by a bus or other means. In fig. 3, the bus connection is taken as an example, wherein the dielectric constant sensor 540 is used for detecting the dielectric constant of the oil in the engine 560 and transmitting the dielectric constant to the vehicle controller 510. The viscosity sensor 530 is used to detect the kinematic viscosity of the oil in the engine 560 and transmit the kinematic viscosity to the vehicle controller 510. The running controller 510 obtains the cumulative number of operating hours of the oil in the engine 560 through the timing device 550. The instrument panel 570 is used for alarming when engine oil needs to be replaced, and prompting a user when the engine oil liquid level is lower than a first preset liquid level and is greater than a second preset liquid level or the remaining maintenance mileage is smaller than a first preset mileage and is greater than a second preset mileage, so as to prompt the user to replenish or replace the engine oil in time.
The memory 520 is a computer-readable storage medium for storing software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the method for diagnosing the oil life of a vehicle according to an embodiment of the present invention. The traveling controller 510 executes various functional applications and data processing of the vehicle by running software programs, instructions, and modules stored in the memory 520, that is, implements the vehicle oil life diagnosis method of the above-described embodiment.
The memory 520 mainly includes a program storage area and a data storage area, wherein the program storage area can store an operating system and an application program required by at least one function; the storage data area may store data created according to the use of the terminal, and the like. Further, the memory 520 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, memory 520 may further include memory located remotely from the vehicle controller 510, which may be connected to the vehicle over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The vehicle provided by the third embodiment of the invention and the vehicle oil life diagnosis method provided by the above embodiment belong to the same inventive concept, and the technical details which are not described in detail in the present embodiment can be referred to the above embodiment, and the present embodiment has the same beneficial effects as the vehicle oil life diagnosis method.
Example four
The fifth embodiment of the present invention further provides a storage medium, on which a computer program is stored, where the computer program, when executed by the vehicle controller 510, implements the method for diagnosing the oil life of the vehicle according to the above-mentioned embodiment of the present invention.
Of course, the storage medium containing the computer-executable instructions provided by the embodiments of the present invention is not limited to the operations in the vehicle oil life diagnosis method described above, and may also perform the relevant operations in the vehicle oil life diagnosis method provided by the embodiments of the present invention, and has corresponding functions and advantages.
From the above description of the embodiments, it is obvious for those skilled in the art that the present invention can be implemented by software and necessary general hardware, and certainly, can also be implemented by hardware, but the former is a better embodiment in many cases. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, and the computer software product may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes instructions for enabling a computer device (which may be a robot, a personal computer, a server, or a network device) to execute the method for diagnosing the service life of the vehicle oil according to the embodiments of the present invention.
The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (10)
1. A vehicle oil life diagnostic method, comprising:
obtaining engine oil parameters, wherein the engine oil parameters comprise dielectric constant, kinematic viscosity and accumulated running hours;
determining the soot content, the oxidation degree, the fuel oil content, the acid value increment relative to the initial acid value and the kinematic viscosity variation relative to the initial kinematic viscosity of the engine oil in the engine;
and diagnosing the service life of the engine oil according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result.
2. The vehicle oil life diagnostic method of claim 1, wherein determining the soot content, the oxidation level, the fuel content, the increase in acid number from the initial acid number, and the change in kinematic viscosity from the initial kinematic viscosity of the engine oil comprises:
the calculation formula of the soot content is as follows: c0.5 (150 ε -10.75 ν -160) e0.5-17.5；
The calculation formula of the oxidation degree is as follows: ox 30 epsilon-2 (150 epsilon-10.75 nu-160) e0.5-2.6；
The calculation formula of the fuel oil content is as follows: d ═ k × C;
the calculation formula of the increase of the acid value is as follows: Δ TAN ═ TAN-TAN0Wherein TAN is 2-0.1125T2+1.1*T；
The calculation formula of the kinematic viscosity variation is as follows: Δ ν ═ ν - ν0|；
Wherein T is the cumulative operating hours of the engine oil/100 h, Ox is the degree of oxidation of the engine oil, and is A/mm, C is the soot content of the engine oil, and is kg/100kg, d is the fuel content in the engine oil, and is kg/100kg, TAN is the acid value of the engine oil0The initial acid value of the engine oil is mgKOH/g, k is a constant and takes the value of 0.5, epsilon is a dielectric constant, v is the kinematic viscosity of the engine oil at 40 ℃, and the unit is mm/s2，ν0Is the initial kinematic viscosity of the engine oil.
3. The vehicle oil life diagnostic method according to claim 2, wherein diagnosing the oil life based on the soot content, the oxidation degree, the fuel oil content, the acid value increase amount, and the kinematic viscosity change amount to obtain a diagnostic result includes:
if Δ v > 20% v0Any one of Ox > 2, C > 3, d > 5 and delta TAN > 2.5 is established, the engine oil is determined to need to be replaced, and an alarm is given.
4. The vehicle oil life diagnostic method of claim 1, wherein an oil level of oil in an engine is obtained, and when the oil level is less than a first preset level and greater than a second preset level, a user is prompted to replenish oil; and when the engine oil liquid level is less than or equal to a second preset liquid level, limiting the rotating speed of the engine and giving an alarm.
5. The vehicle oil life diagnosis method according to claim 1, wherein a remaining maintenance mileage of the vehicle is acquired, when the remaining maintenance mileage is less than a first preset mileage and greater than a second preset mileage, a user is prompted to change the engine oil, and when the remaining maintenance mileage is less than or equal to the second preset mileage, the engine speed is limited and an alarm is given.
6. A vehicle oil life diagnostic device, characterized by comprising:
an oil parameter acquisition module (210) for acquiring oil parameters including dielectric constant, kinematic viscosity, and cumulative operating hours;
a soot content determination module (311) for determining a soot content of engine oil in an engine;
an oxidation level determination module (312) for determining an oxidation level of engine oil in the engine;
a fuel content determination module (313) for determining a fuel content in oil in an engine;
an acid value increase determination module (314) for determining an acid value increase of engine oil in the engine;
a kinematic viscosity change determination module (315) for determining a change in kinematic viscosity of oil in the engine;
and the engine oil life diagnosis module (410) is used for diagnosing the engine oil life according to the soot content, the oxidation degree, the fuel oil content, the acid value increment and the kinematic viscosity variation to obtain a diagnosis result.
7. The vehicle oil life diagnostic apparatus of claim 6, wherein the soot content determination module (311) is configured to input the dielectric constant and kinematic viscosity into a preset soot content model, and output a soot content from the soot content model as a soot content of the oil in the engine.
8. The vehicle oil life diagnostic apparatus according to claim 6, wherein the oxidation degree determination module (312) is specifically configured to input the dielectric constant and the kinematic viscosity into a preset oxidation degree model, and output the oil oxidation degree as the oxidation degree of the oil in the engine from the oxidation degree model.
9. A vehicle including an engine, characterized by further comprising:
a driving controller (510) for driving a vehicle,
a dielectric constant sensor (540) for detecting a dielectric constant of the engine oil and transmitting the dielectric constant to the traveling controller (510);
a viscosity sensor (530) for detecting a kinematic viscosity of the engine oil and transmitting the kinematic viscosity to the traveling controller (510);
the timing device (550) is used for detecting the accumulated running hours of the engine oil, and the running controller (510) acquires the accumulated running hours of the engine oil through the timing device (550);
the instrument panel (570) is used for alarming when the engine oil needs to be replaced;
a memory (520) for storing one or more programs;
when one or more of the programs are executed by the locomotive controller, the locomotive controller (510) is caused to implement the vehicle oil life diagnostic method of any of claims 1-5.
10. A storage medium having stored thereon a computer program, characterized in that the computer program, when executed by a vehicle controller (510), implements a vehicle oil life diagnostic method according to any one of claims 1-5.
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