CN112800584A - Engine oil aging degree evaluation method and device, terminal and storage medium - Google Patents
Engine oil aging degree evaluation method and device, terminal and storage medium Download PDFInfo
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- 239000010705 motor oil Substances 0.000 title claims abstract description 589
- 230000032683 aging Effects 0.000 title claims abstract description 76
- 238000011156 evaluation Methods 0.000 title claims abstract description 34
- 238000003860 storage Methods 0.000 title claims abstract description 11
- 230000003647 oxidation Effects 0.000 claims abstract description 107
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 107
- 229910052751 metal Inorganic materials 0.000 claims abstract description 52
- 238000004140 cleaning Methods 0.000 claims abstract description 51
- 239000002253 acid Substances 0.000 claims abstract description 49
- 238000006396 nitration reaction Methods 0.000 claims abstract description 47
- 239000002184 metal Substances 0.000 claims abstract description 46
- 238000000034 method Methods 0.000 claims abstract description 33
- 239000000126 substance Substances 0.000 claims abstract description 26
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 239000003921 oil Substances 0.000 claims description 47
- 239000002585 base Substances 0.000 claims description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 238000011109 contamination Methods 0.000 claims description 17
- 230000006866 deterioration Effects 0.000 claims description 16
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 13
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 13
- 229910052802 copper Inorganic materials 0.000 claims description 13
- 239000010949 copper Substances 0.000 claims description 13
- 230000015556 catabolic process Effects 0.000 claims description 7
- 238000006731 degradation reaction Methods 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims 2
- 229910052742 iron Inorganic materials 0.000 claims 2
- 239000011133 lead Substances 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The application discloses a method and a device for evaluating the aging degree of engine oil, a terminal and a storage medium, and relates to the technical field of vehicle detection. The engine oil aging degree evaluation method comprises the steps of obtaining physical and chemical performance parameters of engine oil to be evaluated, wherein the physical and chemical performance parameters comprise an alkali number, a nitration degree, a metal element content, an oxidation degree/an acid number; respectively determining the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil according to the physical and chemical performance parameters of the engine oil to be evaluated; evaluating the aging degree of the engine oil to be evaluated in a weighted average mode according to the engine oil cleaning capacity attenuation degree, the engine oil pollution degree, the engine oil anti-wear performance attenuation degree and the engine oil oxidation degree; the problem that the evaluation index is single when the aging degree of the engine oil is evaluated at present is solved; the effects of comprehensively evaluating the aging degree of the engine oil and optimizing the evaluation result of the aging degree of the engine oil are achieved.
Description
Technical Field
The application relates to the technical field of vehicle detection, in particular to a method and a device for evaluating the aging degree of engine oil, a terminal and a storage medium.
Background
Engine oil, i.e., engine lubricating oil, plays a role in lubrication, cooling, sealing, cleaning, rust prevention, buffering, and the like in internal combustion engines. Under the action of high-temperature oxidation, carbon deposition, fuel pollution and the like of the internal combustion engine, the performance of the engine oil is continuously degraded along with the increase of the service life of the engine oil.
At present, whether the engine oil is aged or not is judged generally according to engine oil physical and chemical performance parameters and empirical knowledge provided by an engine oil detection report, that is, the engine oil physical and chemical performance parameters are compared with a threshold value, and whether the engine oil is aged or not is judged according to a comparison result.
However, in the existing evaluation method for the aging degree of the engine oil, when any engine oil performance index parameter exceeds the corresponding threshold value, the engine oil is judged to be invalid or aged, and the evaluation index is single.
Disclosure of Invention
In order to solve the problems in the related art, the application provides an engine oil aging degree evaluation method, an engine oil aging degree evaluation device, a terminal and a storage medium. The technical scheme is as follows:
in a first aspect, an embodiment of the present application provides a method for evaluating a degree of aging of an engine oil, the method including:
acquiring physical and chemical performance parameters of the engine oil to be evaluated, wherein the physical and chemical performance parameters comprise an alkali value, a nitration degree, a metal element content and an oxidation degree/acid value;
respectively determining the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil according to the physical and chemical performance parameters of the engine oil to be evaluated;
and evaluating the aging degree of the engine oil to be evaluated in a weighted average mode according to the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil.
The method comprises the steps of obtaining physical and chemical performance parameters of the engine oil to be evaluated, determining the engine oil cleaning capacity attenuation degree, the engine oil pollution degree, the engine oil wear resistance attenuation degree and the engine oil oxidation degree of the engine oil to be evaluated according to the physical and chemical performance parameters, and comprehensively evaluating the aging degree of the engine oil to be evaluated according to the engine oil cleaning capacity attenuation degree, the engine oil pollution degree, the engine oil wear resistance attenuation degree and the engine oil oxidation degree; the problem that the evaluation index is single when the aging degree of the engine oil is evaluated at present is solved; the effects of comprehensively evaluating the aging degree of the engine oil and optimizing the evaluation result of the aging degree of the engine oil are achieved.
Optionally, determining the degree of attenuation of the cleaning ability of the engine oil according to the physicochemical performance parameters of the engine oil to be evaluated, including:
acquiring an initial base number of engine oil with the same label as the engine oil to be evaluated and a base number of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
the degree of deterioration of the engine oil cleaning ability of the engine oil to be evaluated is calculated according to the following formula:
wherein eta iscaIndicating the degree of deterioration of the oil cleaning ability, omegatbnIndicates the base number, omega, of the engine oil to be evaluatedtbn_iniIndicates the initial base number, omega, of the engine oil having the same number as the engine oil to be evaluatedtbn_endIndicating the base number when the engine oil having the same number as that of the engine oil to be evaluated was completely aged.
Optionally, determining the degree of engine oil pollution according to the physicochemical performance parameters of the engine oil to be evaluated, including:
acquiring the initial nitration degree of the engine oil with the same label as the engine oil to be evaluated and the nitration degree of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
the engine oil pollution degree of the engine oil to be evaluated is calculated according to the following formula:
wherein eta iscdIndicating the degree of contamination of the engine oil, omeganitIndicating the degree of nitration, omega, of the engine oil to be evaluatednit_iniIndicating the initial nitration degree, omega, of an engine oil having the same number as the engine oil to be evaluatednit_endIndicating the nitration degree when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
Optionally, determining the degree of attenuation of the anti-wear performance of the engine oil according to the physicochemical performance parameters of the engine oil to be evaluated, including:
obtaining the initial metal element content of the engine oil with the same label as the engine oil to be evaluated and the metal element content of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
calculating the attenuation degree of the engine oil wear resistance of the engine oil to be evaluated according to the following formula:
wherein eta isantiIndicating the degree of attenuation, omega, of the antiwear properties of the engine oilanti_mIndicates the content of the metal element, omega, of the engine oil to be evaluatedanti_m_iniIndicates the initial metal element content, omega, of the engine oil having the same reference number as the engine oil to be evaluatedanti_m_endIndicates the content of metallic elements when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
Optionally, determining the degree of oxidation of the engine oil according to the physicochemical performance parameters of the engine oil to be evaluated, including:
obtaining the initial oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated and the oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
the engine oil oxidation degree of the engine oil to be evaluated is calculated according to the following formula:
wherein eta isoxiIndicating the degree of oxidation of the engine oil, omegaoxiIndicates the degree of oxidation/acid number, omega, of the engine oil to be evaluatedoxi_iniIndicates the initial oxidation degree/acid value, omega, of an engine oil having the same number as the engine oil to be evaluatedoxi_endIndicates the oxidation degree/acid value at the time of complete aging of the engine oil having the same number as that of the engine oil to be evaluated.
Optionally, the method for evaluating the aging degree of the engine oil to be evaluated in a weighted average mode according to the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil comprises the following steps:
the aging degree of the engine oil to be evaluated is calculated according to the following formula:
ηaging＝ψ1ηca+ψ2ηoxi+ψ3ηcd+ψ4ηanti，
wherein eta isagingIndicating the degree of ageing of the engine oil, etacaIndicating the degree of deterioration of the engine oil cleaning ability, etaoxiIndicates the degree of oxidation of the engine oil,. etacdIndicating the degree of contamination of the engine oil, etaantiIndicating the degree of attenuation of the antiwear properties of the engine oil,. psi1、ψ2、ψ3And psi4All values of (1) are [0,1 ]]And phi1+ψ2+ψ3+ψ4＝1。
The engine oil aging degree is comprehensively evaluated from four aspects of the engine oil cleaning ability attenuation degree, the engine oil pollution degree, the engine oil wear resistance attenuation degree and the engine oil oxidation degree by giving different weights to the engine oil cleaning ability attenuation degree, the engine oil pollution degree, the engine oil wear resistance attenuation degree and the engine oil oxidation degree, so that the effect of more reasonably evaluating the engine oil aging degree is realized.
Optionally, the content of the metal element is the content of iron element, or the content of copper element, or the content of lead element, or the content of aluminum element, or the weighted average content of iron element, copper element, lead element and aluminum element.
In a second aspect, an embodiment of the present application provides an apparatus for evaluating a degree of aging of engine oil, where the apparatus includes an obtaining module, a converting module, and an evaluating module;
the acquisition module is used for acquiring physical and chemical performance parameters of the engine oil to be evaluated, wherein the physical and chemical performance parameters comprise an alkali value, a nitration degree, a metal element content and an oxidation degree/acid value;
the conversion module is used for respectively determining the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil according to the physical and chemical performance parameters of the engine oil to be evaluated;
and the evaluation module is used for evaluating the aging degree of the engine oil to be evaluated in a weighted average mode according to the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the abrasion resistance of the engine oil and the oxidation degree of the engine oil.
Optionally, the obtaining module is further configured to obtain an initial base number of the engine oil having the same label as the engine oil to be evaluated, and a base number of the engine oil having the same label as the engine oil to be evaluated when the engine oil is completely aged;
the conversion module is used for calculating the attenuation degree of the cleaning capability of the engine oil to be evaluated according to the following formula:
wherein eta iscaIndicating the degree of deterioration of the oil cleaning ability, omegatbnIndicates the base number, omega, of the engine oil to be evaluatedtbn_iniIndicates the initial base number, omega, of the engine oil having the same number as the engine oil to be evaluatedtbn_endIndicating the base number when the engine oil having the same number as that of the engine oil to be evaluated was completely aged.
Optionally, the obtaining module is further configured to obtain an initial nitration degree of the engine oil with the same label as the engine oil to be evaluated, and a nitration degree when the engine oil with the same label as the engine oil to be evaluated is completely aged;
the conversion module is used for calculating the engine oil pollution degree of the engine oil to be evaluated according to the following formula:
wherein eta iscdIndicating the degree of contamination of the engine oil, omeganitIndicating the degree of nitration, omega, of the engine oil to be evaluatednit_iniIndicating the initial nitration degree, omega, of an engine oil having the same number as the engine oil to be evaluatednit_endIndicating the nitration degree when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
Optionally, the obtaining module is further configured to obtain an initial metal element content of the engine oil with the same label as the engine oil to be evaluated and a metal element content of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
the conversion module is used for calculating the attenuation degree of the engine oil wear resistance of the engine oil to be evaluated according to the following formula:
wherein eta isantiIndicating the degree of attenuation, omega, of the antiwear properties of the engine oilanti_mIndicates the content of the metal element, omega, of the engine oil to be evaluatedanti_m_iniIndicates the initial metal element content, omega, of the engine oil having the same reference number as the engine oil to be evaluatedanti_m_endIndicates the content of metallic elements when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
Optionally, the obtaining module is further configured to obtain an initial oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated, and an oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
the conversion module is used for calculating the engine oil oxidation degree of the engine oil to be evaluated according to the following formula:
wherein eta isoxiIndicating the degree of oxidation of the engine oil, omegaoxiIndicates the degree of oxidation/acid number, omega, of the engine oil to be evaluatedoxi_iniIndicates the initial oxidation degree/acid value, omega, of an engine oil having the same number as the engine oil to be evaluatedoxi_endIndicates the oxidation degree/acid value at the time of complete aging of the engine oil having the same number as that of the engine oil to be evaluated.
Optionally, the evaluation module is configured to calculate the aging degree of the engine oil to be evaluated according to the following formula:
ηaging＝ψ1ηca+ψ2ηoxi+ψ3ηcd+ψ4ηanti，
wherein eta isagingIndicating the degree of ageing of the engine oil, etacaIndicating the degree of deterioration of the engine oil cleaning ability, etaoxiIndicates the degree of oxidation of the engine oil,. etacdIndicating the degree of contamination of the engine oil, etaantiIndicating the degree of attenuation of the antiwear properties of the engine oil,. psi1、ψ2、ψ3And psi4All values of (1) are [0,1 ]]And phi1+ψ2+ψ3+ψ4＝1。
Optionally, the content of the metal element is the content of iron element, or the content of copper element, or the content of lead element, or the content of aluminum element, or the weighted average content of iron element, copper element, lead element and aluminum element.
In a third aspect, an embodiment of the present application provides a terminal, where the apparatus includes a processor and a memory; the memory stores therein a program that is loaded and executed by the processor to implement the oil aging degree evaluation method shown in the above-described first aspect.
In a fourth aspect, embodiments of the present application provide a computer-readable storage medium, in which a program is stored, and the program is used to implement the oil aging degree evaluation method according to the first aspect when executed by a processor.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings needed to be used in the detailed description of the present application or the prior art description will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a flow chart of a method for evaluating aging degree of engine oil according to an embodiment of the present disclosure;
FIG. 2 is a block diagram of an apparatus for evaluating the aging degree of engine oil according to an embodiment of the present disclosure;
fig. 3 is a block diagram of a terminal according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the present application will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being 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 application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection can be mechanical connection or electrical connection; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be communicated with each other inside the two elements, or may be wirelessly connected or wired connected. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
In addition, the technical features mentioned in the different embodiments of the present application described below may be combined with each other as long as they do not conflict with each other.
Referring to fig. 1, a flow chart of a method for evaluating aging degree of engine oil provided by an embodiment of the present application is shown, the method at least includes the following steps:
101, acquiring physical and chemical performance parameters of the engine oil to be evaluated, wherein the physical and chemical performance parameters comprise an alkali number, a nitration degree, a metal element content, an oxidation degree/an acid number.
And obtaining oil of the engine oil to be evaluated, and detecting the oil of the engine oil to be evaluated to obtain the physical and chemical performance parameters of the engine oil to be evaluated.
In one example, the obtained physicochemical performance parameters are: base number, nitration degree, metal element content and oxidation degree. In another example, the obtained physicochemical performance parameters are: base number, nitration degree, metal element content and acid value.
102, respectively determining the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil according to the physical and chemical performance parameters of the engine oil to be evaluated.
The physical and chemical performance parameters of the engine oil are converted into actual action and effect indexes.
The base number of the engine oil corresponds to the attenuation degree of the cleaning capability of the engine oil, the nitration degree of the engine oil corresponds to the pollution degree of the engine oil, the content of metal elements of the engine oil corresponds to the attenuation degree of the wear resistance of the engine oil, and the oxidation degree or acid number of the engine oil corresponds to the oxidation degree of the engine oil.
The attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the wear resistance of the engine oil and the oxidation degree of the engine oil are represented by numerical values respectively, and the larger the numerical value is, the higher the degree is.
And 103, evaluating the aging degree of the engine oil to be evaluated in a weighted average mode according to the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil.
And comprehensively evaluating the aging degree of the engine oil from four aspects of the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the abrasion resistance of the engine oil and the oxidation degree of the engine oil by using a weighted average mode.
The degree of aging of the engine oil is represented by a numerical value, and the larger the numerical value, the higher the degree.
In summary, the method for evaluating the aging degree of the engine oil provided in the embodiment of the present application determines the attenuation degree of the cleaning capability of the engine oil to be evaluated, the contamination degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil according to the physicochemical performance parameters of the engine oil to be evaluated, and then comprehensively evaluates the aging degree of the engine oil to be evaluated according to the attenuation degree of the cleaning capability of the engine oil, the contamination degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the; the problem that the evaluation index is single when the aging degree of the engine oil is evaluated at present is solved; the effects of comprehensively evaluating the aging degree of the engine oil and optimizing the evaluation result of the aging degree of the engine oil are achieved.
In an alternative embodiment based on the embodiment shown in fig. 1, the oil cleaning ability degradation degree is determined according to the physicochemical performance parameter of the oil to be evaluated in the following manner: and determining the attenuation degree of the engine oil cleaning capability of the engine oil to be evaluated according to the base number of the engine oil to be evaluated. The method comprises the following specific steps:
1. and acquiring the initial base number of the engine oil with the same label as the engine oil to be evaluated and the base number of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged.
The initial base number refers to the base number of the engine oil in a brand new state.
2. The degree of deterioration of the engine oil cleaning ability of the engine oil to be evaluated is calculated according to the following formula:
wherein eta iscaThe attenuation degree of the cleaning capability of the engine oil is expressed by percentage; omegatbnIndicates the base number, omega, of the engine oil to be evaluatedtbn_iniRepresentation and treatEvaluation of initial base number, omega, of oils having the same gradetbn_endIndicating the base number when the engine oil having the same number as that of the engine oil to be evaluated was completely aged.
Alternatively, the base number is in mg KOH/g.
In an alternative embodiment based on the embodiment shown in fig. 1, the mode of determining the degree of contamination of the engine oil according to the physicochemical performance parameters of the engine oil to be evaluated is as follows: and determining the engine oil pollution degree of the engine oil to be evaluated according to the nitration degree of the engine oil to be evaluated. The method comprises the following specific steps:
1. and acquiring the initial nitration degree of the engine oil with the same label as the engine oil to be evaluated and the nitration degree of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged.
The initial nitration degree refers to the nitration degree of the engine oil in a brand new state.
2. The engine oil pollution degree of the engine oil to be evaluated is calculated according to the following formula:
wherein eta iscdThe pollution degree of the engine oil is expressed by percentage; omeganitIndicating the degree of nitration, omega, of the engine oil to be evaluatednit_iniIndicating the initial nitration degree, omega, of an engine oil having the same number as the engine oil to be evaluatednit_endIndicating the nitration degree when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
Alternatively, the nitration degree is in Abs/cm.
In an alternative embodiment based on the embodiment shown in fig. 1, the mode of determining the degree of degradation of the anti-wear performance of the engine oil according to the physicochemical performance parameters of the engine oil to be evaluated is as follows: and determining the attenuation degree of the engine oil anti-wear performance of the engine oil to be evaluated according to the content of the metal elements of the engine oil to be evaluated. The method comprises the following specific steps:
1. and acquiring the initial metal element content of the engine oil with the same label as the engine oil to be evaluated and the metal element content of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged.
The initial metal element content refers to the metal element content of the engine oil in a brand new state.
Optionally, the content of the metal element is the content of iron element, or the content of copper element, or the content of lead element, or the content of aluminum element, or the weighted average content of iron element, copper element, lead element and aluminum element.
When the content of the metal element refers to the weighted average content of the iron element, the copper element, the lead element and the aluminum element, the weighting coefficient corresponding to each metal element is determined according to the actual situation.
2. Calculating the attenuation degree of the engine oil wear resistance of the engine oil to be evaluated according to the following formula:
wherein eta isantiExpressing the attenuation degree of the wear resistance of the engine oil, wherein the attenuation degree of the wear resistance of the engine oil is expressed by percentage; omegaanti_mIndicates the content of the metal element, omega, of the engine oil to be evaluatedanti_m_iniIndicates the initial metal element content, omega, of the engine oil having the same reference number as the engine oil to be evaluatedanti_m_endIndicates the content of metallic elements when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
Optionally, the unit of the content of the metal element is ppm.
In an alternative embodiment based on the embodiment shown in fig. 1, the oil oxidation degree is determined according to the physicochemical property parameters of the oil to be evaluated in the following manner: and determining the engine oil oxidation degree of the engine oil to be evaluated according to the oxidation degree/acid value of the engine oil to be evaluated. The method comprises the following specific steps:
1. and acquiring the initial oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated and the oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged.
If the degree of oxidation is adopted to calculate the degree of oxidation of the engine oil, the degree of oxidation of the engine oil to be evaluated is obtained in step 101, and the initial degree of oxidation of the engine oil having the same number as the engine oil to be evaluated and the degree of oxidation of the engine oil having the same number as the engine oil to be evaluated when the engine oil is completely aged are obtained.
The initial oxidation degree refers to the oxidation degree of the engine oil in a brand new state.
If the oil oxidation degree is calculated by using the acid value, the acid value of the engine oil to be evaluated is obtained in step 101, and the initial acid value of the engine oil having the same number as that of the engine oil to be evaluated and the acid value of the engine oil having the same number as that of the engine oil to be evaluated when the engine oil is completely aged are obtained.
The initial acid value refers to the acid value of the engine oil in a brand new state.
2. The engine oil oxidation degree of the engine oil to be evaluated is calculated according to the following formula:
wherein eta isoxiThe oxidation degree of the engine oil is expressed by percentage;
ωoxiindicates the degree of oxidation/acid number, omega, of the engine oil to be evaluatedoxi_iniIndicates the initial oxidation degree/acid value, omega, of an engine oil having the same number as the engine oil to be evaluatedoxi_endIndicates the oxidation degree/acid value at the time of complete aging of the engine oil having the same number as that of the engine oil to be evaluated.
If the degree of oxidation is used to calculate the degree of oil oxidation, then ω in equation (4)oxi_iniIndicates the initial oxidation degree, omega, of an engine oil having the same number as the engine oil to be evaluatedoxi_endIndicating the degree of oxidation when the engine oil having the same number as that of the engine oil to be evaluated was completely aged.
If the degree of oil oxidation is calculated using the acid value, ω in formula (4)oxi_iniIndicates the acid value, omega, of an engine oil having the same number as the engine oil to be evaluatedoxi_endIndicates the acid value at the time of complete aging of the engine oil having the same number as that of the engine oil to be evaluated.
In an alternative embodiment based on the embodiment shown in fig. 1, the step 103, namely the step "estimating the aging degree of the engine oil to be evaluated by using a weighted average according to the degree of attenuation of the cleaning capability of the engine oil, the degree of pollution of the engine oil, the degree of attenuation of the anti-wear performance of the engine oil, and the degree of oxidation of the engine oil", is realized by the following steps:
the aging degree of the engine oil to be evaluated is calculated according to the following formula:
ηaging＝ψ1ηca+ψ2ηoxi+ψ3ηcd+ψ4ηantiformula (5)
Wherein eta isagingIndicating the degree of ageing of the engine oil, etacaIndicating the degree of deterioration of the engine oil cleaning ability, etaoxiIndicates the degree of oxidation of the engine oil,. etacdIndicating the degree of contamination of the engine oil, etaantiIndicating the degree of degradation of the antiwear properties of the engine oil.
ψ1Has a value range of [0,1 ]]，ψ2Has a value range of [0,1 ]]，ψ3Has a value range of [0,1 ]]，ψ4Has a value range of [0,1 ]]And phi1+ψ2+ψ3+ψ4＝1。
ψ1、ψ2、ψ3And psi4The value of (c) is determined according to the actual situation.
In one example, a recommended maintenance mileage of 15000km oil is used on a light gasoline vehicle, and oil samples are collected at oil-to-oil mileage of 0km, 6500km, 11500km, 13600km and 14700km, respectively.
The collected engine oil samples are respectively analyzed to obtain engine oil physical and chemical performance parameters corresponding to different oil mileage, and the engine oil physical and chemical performance parameters are base number, oxidation degree, nitration degree and iron element content as shown in table 1.
TABLE 1
The initial value and the value of the engine oil with the same label as the sample engine oil during complete aging are respectively obtained according to the physicochemical performance parameters (base number, oxidation degree, nitration degree and iron element content) of the engine oil, and the obtained data are shown in table 2.
TABLE 2
| Base number (mg KOH/g) | Degree of oxidation (Abs/cm) | Degree of nitration (Abs/cm) | Iron element content (ppm) | |
| Initial value | 8 | 0 | 0 | 0 |
| Value at full aging | 4 | 18 | 26 | 25 |
For the engine oil samples with different oil mileage, the attenuation degree of the cleaning ability of the engine oil is calculated according to the formula (1), and the obtained results are shown in table 3.
TABLE 3
| Oil mileage (Km) | Degree of deterioration of engine oil cleaning ability |
| 0 | 0 |
| 6500 | 64.8％ |
| 11500 | 82.0％ |
| 14700 | 96.5％ |
And (3) calculating the oxidation degree of the engine oil according to a formula (4) aiming at engine oil samples with different oil mileage respectively, and obtaining results shown in a table 4.
TABLE 4
| Oil mileage (Km) | Degree of oxidation of engine oil |
| 0 | 0 |
| 6500 | 44.4％ |
| 11500 | 72.2％ |
| 14700 | 88.9％ |
And (3) calculating the pollution degree of the engine oil according to the formula (2) aiming at the engine oil samples with different oil mileage respectively, and obtaining results shown in a table 5.
TABLE 5
| Oil mileage (Km) | Degree of contamination of engine oil |
| 0 | 0 |
| 6500 | 42.3％ |
| 11500 | 61.5％ |
| 14700 | 88.5％ |
For the engine oil samples with different oil mileage, the wear resistance attenuation degree of the engine oil is calculated according to the formula (3), and the obtained results are shown in table 6.
TABLE 6
| Oil mileage (Km) | Degree of attenuation of wear resistance of engine oil |
| 0 | 0 |
| 6500 | 64.0％ |
| 11500 | 96.0％ |
| 14700 | 100％ |
By psi1＝0.25、ψ2＝0.25、ψ30.25 and psi4As an example, 0.25 by equation ηaging＝0.25ηca+0.252ηoxi+0.253ηcd+0.25ηantiAnd (3) calculating the aging degrees of the engine oil samples with different oil mileage, wherein the corresponding aging degrees of the engine oil samples with different oil mileage are shown in a table 7.
TABLE 7
| Oil mileage (Km) | Aging ofDegree |
| 0 | 0 |
| 6500 | 53.9％ |
| 11500 | 77.9％ |
| 14700 | 93.5％ |
The following are embodiments of the apparatus of the present application that may be used to perform embodiments of the method of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.
FIG. 2 is a block diagram of an engine oil degradation evaluation device according to an embodiment of the present application, the device including at least the following modules: an acquisition module 210, a conversion module 220, and an evaluation module 230.
The obtaining module 210 is configured to obtain physicochemical performance parameters of the engine oil to be evaluated, where the physicochemical performance parameters include a base number, a nitration degree, a metal element content, and an oxidation degree/acid number.
The conversion module 220 is configured to determine an engine oil cleaning capability attenuation degree, an engine oil pollution degree, an engine oil wear resistance attenuation degree, and an engine oil oxidation degree according to the physicochemical performance parameters of the engine oil to be evaluated.
And the evaluation module 230 is configured to evaluate the aging degree of the engine oil to be evaluated in a weighted average manner according to the engine oil cleaning ability attenuation degree, the engine oil pollution degree, the engine oil wear resistance attenuation degree and the engine oil oxidation degree.
Optionally, the obtaining module is further configured to obtain an initial base number of the engine oil having the same label as the engine oil to be evaluated, and a base number of the engine oil having the same label as the engine oil to be evaluated when the engine oil is completely aged;
the conversion module is used for calculating the attenuation degree of the cleaning capability of the engine oil to be evaluated according to the following formula:
wherein eta iscaIndicating the degree of deterioration of the oil cleaning ability, omegatbnIndicates the base number, omega, of the engine oil to be evaluatedtbn_iniIndicates the initial base number, omega, of the engine oil having the same number as the engine oil to be evaluatedtbn_endIndicating the base number when the engine oil having the same number as that of the engine oil to be evaluated was completely aged.
Optionally, the obtaining module is further configured to obtain an initial nitration degree of the engine oil with the same label as the engine oil to be evaluated, and a nitration degree when the engine oil with the same label as the engine oil to be evaluated is completely aged;
the conversion module is used for calculating the engine oil pollution degree of the engine oil to be evaluated according to the following formula:
wherein eta iscdIndicating the degree of contamination of the engine oil, omeganitIndicating the degree of nitration, omega, of the engine oil to be evaluatednit_iniIndicating the initial nitration degree, omega, of an engine oil having the same number as the engine oil to be evaluatednit_endIndicating the nitration degree when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
Optionally, the obtaining module is further configured to obtain an initial metal element content of the engine oil with the same label as the engine oil to be evaluated and a metal element content of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
the conversion module is used for calculating the attenuation degree of the engine oil wear resistance of the engine oil to be evaluated according to the following formula:
wherein eta isantiIndicating the degree of attenuation, omega, of the antiwear properties of the engine oilanti_mIndicates the content of the metal element, omega, of the engine oil to be evaluatedanti_m_iniIndicates the initial metal element content, omega, of the engine oil having the same reference number as the engine oil to be evaluatedanti_m_endIndicates the content of metallic elements when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
Optionally, the obtaining module is further configured to obtain an initial oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated, and an oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
the conversion module is used for calculating the engine oil oxidation degree of the engine oil to be evaluated according to the following formula:
wherein eta isoxiIndicating the degree of oxidation of the engine oil, omegaoxiIndicates the degree of oxidation/acid number, omega, of the engine oil to be evaluatedoxi_iniIndicates the initial oxidation degree/acid value, omega, of an engine oil having the same number as the engine oil to be evaluatedoxi_endIndicates the oxidation degree/acid value at the time of complete aging of the engine oil having the same number as that of the engine oil to be evaluated.
Optionally, the evaluation module is configured to calculate the aging degree of the engine oil to be evaluated according to the following formula:
ηaging＝ψ1ηca+ψ2ηoxi+ψ3ηcd+ψ4ηanti，
wherein eta isagingIndicating the degree of ageing of the engine oil, etacaIndicating the degree of deterioration of the engine oil cleaning ability, etaoxiIndicates the degree of oxidation of the engine oil,. etacdIndicating the degree of contamination of the engine oil, etaantiIndicating the degree of attenuation of the antiwear properties of the engine oil,. psi1、ψ2、ψ3And psi4All values of (1) are [0,1 ]]And phi1+ψ2+ψ3+ψ4＝1。
Optionally, the content of the metal element is the content of iron element, or the content of copper element, or the content of lead element, or the content of aluminum element, or the weighted average content of iron element, copper element, lead element and aluminum element.
For relevant details reference is made to the above-described method embodiments.
It should be noted that: the engine oil aging degree evaluation device provided in the above embodiment is only illustrated by dividing the above functional modules when performing the engine oil aging degree evaluation, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the engine oil aging degree evaluation device is divided into different functional modules to complete all or part of the above described functions. In addition, the engine oil aging degree evaluation device provided by the embodiment and the engine oil aging degree evaluation method embodiment belong to the same concept, and the specific implementation process is detailed in the method embodiment and is not described again.
Referring to fig. 3, a block diagram of a terminal according to an exemplary embodiment of the present application is shown. A terminal in the present application may include one or more of the following components: a processor 310 and a memory 320.
Alternatively, the processor 310, when executing the program instructions in the memory 320, implements the method for estimating the degree of oil degradation provided by the various method embodiments described above.
The Memory 320 may include a Random Access Memory (RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 320 includes a non-transitory computer-readable medium. The memory 320 may be used to store instructions, programs, code sets, or instruction sets. The memory 320 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function, instructions for implementing the various method embodiments described above, and the like; the storage data area may store data created according to the use of the terminal, and the like.
It should be added that the above terminal is only illustrative, and in actual implementation, the terminal may also include fewer or more components, such as: the terminal further comprises a touch display screen, a communication component, a sensor component and the like, and the embodiment is not limited to one embodiment.
Optionally, the present application further provides a computer-readable storage medium, in which a program is stored, and the program is loaded and executed by a processor to implement the oil aging degree evaluation method of the above-mentioned method embodiment.
Optionally, the present application further provides a computer product, which includes a computer-readable storage medium, in which a program is stored, and the program is loaded and executed by a processor to implement the oil aging degree evaluation method of the above-mentioned method embodiment.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of this invention are intended to be covered by the scope of the invention as expressed herein.
Claims (16)
1. A method for evaluating the aging degree of engine oil, which is characterized by comprising the following steps:
acquiring physical and chemical performance parameters of the engine oil to be evaluated, wherein the physical and chemical performance parameters comprise an alkali number, a nitration degree, a metal element content and an oxidation degree/acid number;
respectively determining the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil according to the physical and chemical performance parameters of the engine oil to be evaluated;
and evaluating the aging degree of the engine oil to be evaluated in a weighted average mode according to the engine oil cleaning capacity attenuation degree, the engine oil pollution degree, the engine oil anti-wear performance attenuation degree and the engine oil oxidation degree.
2. The method according to claim 1, wherein determining the degree of degradation of the cleaning ability of the engine oil according to the physicochemical property parameter of the engine oil to be evaluated comprises:
acquiring an initial base number of the engine oil with the same label as the engine oil to be evaluated and a base number of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
calculating the degree of attenuation of the engine oil cleaning capability of the engine oil to be evaluated according to the following formula:
wherein eta iscaIndicating the degree of deterioration of the oil cleaning ability, omegatbnIndicates the base number, omega, of the engine oil to be evaluatedtbn_iniIndicates the initial base number, ω, of the engine oil having the same number as the engine oil to be evaluatedtbn_endIndicates the base number when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
3. The method according to claim 1, wherein the determining the degree of oil contamination based on the physicochemical property parameter of the oil to be evaluated comprises:
acquiring the initial nitration degree of the engine oil with the same label as the engine oil to be evaluated and the nitration degree of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
calculating the engine oil pollution degree of the engine oil to be evaluated according to the following formula:
wherein eta iscdIndicating the degree of contamination of the engine oil, omeganitRepresents the nitration degree, omega, of the engine oil to be evaluatednit_iniIndicates the initial nitration degree, omega, of the engine oil having the same number as the engine oil to be evaluatednit_endIndicating the nitration degree when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
4. The method according to claim 1, wherein the determining the degree of degradation of the anti-wear performance of the engine oil according to the physicochemical performance parameter of the engine oil to be evaluated comprises:
acquiring the initial metal element content of the engine oil with the same label as the engine oil to be evaluated and the metal element content of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
and calculating the attenuation degree of the engine oil anti-wear performance of the engine oil to be evaluated according to the following formula:
wherein eta isantiIndicating the degree of attenuation, omega, of the antiwear properties of the engine oilanti_mRepresents the metal element content, omega, of the engine oil to be evaluatedanti_m_iniIndicating and evaluating the engine oilInitial metal element content, omega, of engine oil having the same reference numberanti_m_endIndicates the content of the metal element when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
5. The method according to claim 1, wherein said determining the degree of oil oxidation based on the physicochemical property parameter of the oil under evaluation comprises:
acquiring the initial oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated and the oxidation degree/acid value of the engine oil with the same label as the engine oil to be evaluated when the engine oil is completely aged;
and calculating the engine oil oxidation degree of the engine oil to be evaluated according to the following formula:
wherein eta isoxiIndicating the degree of oxidation of the engine oil, omegaoxiRepresents the oxidation degree/acid value, omega, of the engine oil to be evaluatedoxi_iniIndicates the initial oxidation degree/acid value, ω, of the engine oil having the same number as that of the engine oil to be evaluatedoxi_endIndicates the oxidation degree/acid value at the time of complete aging of the engine oil having the same reference numeral as that of the engine oil to be evaluated.
6. The method according to any one of claims 1 to 5, wherein said evaluating the degree of aging of the oil to be evaluated based on the degree of deterioration of the oil cleaning ability, the degree of contamination of the oil, the degree of deterioration of the anti-wear performance of the oil, and the degree of oxidation of the oil by means of a weighted average comprises:
and calculating the aging degree of the engine oil to be evaluated according to the following formula:
ηaging＝ψ1ηca+ψ2ηoxi+ψ3ηcd+ψ4ηanti，
wherein eta isagingIndicating the degree of ageing of the engine oil, etacaIndicating the degree of deterioration of the engine oil cleaning ability, etaoxiIndicates the degree of oxidation of the engine oil,. etacdIndicating the degree of contamination of the engine oil, etaantiIndicating the degree of attenuation of the antiwear properties of the engine oil,. psi1、ψ2、ψ3And psi4All values of (1) are [0,1 ]]And phi1+ψ2+ψ3+ψ4＝1。
7. The method according to claim 1 or 4, wherein the metal element content is an iron element content, or a copper element content, or a lead element content, or an aluminum element content, or a weighted average of iron, copper, lead and aluminum elements.
8. The device for evaluating the aging degree of the engine oil is characterized by comprising an acquisition module, a conversion module and an evaluation module;
the acquisition module is used for acquiring physical and chemical performance parameters of the engine oil to be evaluated, wherein the physical and chemical performance parameters comprise an alkali value, a nitration degree, a metal element content, an oxidation degree/an acid value;
the conversion module is used for respectively determining the attenuation degree of the cleaning capability of the engine oil, the pollution degree of the engine oil, the attenuation degree of the anti-wear performance of the engine oil and the oxidation degree of the engine oil according to the physical and chemical performance parameters of the engine oil to be evaluated;
and the evaluation module is used for evaluating the aging degree of the engine oil to be evaluated in a weighted average mode according to the engine oil cleaning capacity attenuation degree, the engine oil pollution degree, the engine oil anti-wear performance attenuation degree and the engine oil oxidation degree.
9. The device according to claim 8, wherein the obtaining module is further configured to obtain an initial base number of the engine oil having the same number as that of the engine oil to be evaluated, and a base number of the engine oil having the same number as that of the engine oil to be evaluated when the engine oil is completely aged;
the conversion module is used for calculating the attenuation degree of the engine oil cleaning capacity of the engine oil to be evaluated according to the following formula:
wherein eta iscaIndicating the degree of deterioration of the oil cleaning ability, omegatbnIndicates the base number, omega, of the engine oil to be evaluatedtbn_iniIndicates the initial base number, ω, of the engine oil having the same number as the engine oil to be evaluatedtbn_endIndicates the base number when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
10. The device of claim 8, wherein the obtaining module is further configured to obtain an initial nitration degree of the engine oil having the same number as the engine oil to be evaluated, and a nitration degree when the engine oil having the same number as the engine oil to be evaluated is completely aged;
the conversion module is used for calculating the engine oil pollution degree of the engine oil to be evaluated according to the following formula:
wherein eta iscdIndicating the degree of contamination of the engine oil, omeganitRepresents the nitration degree, omega, of the engine oil to be evaluatednit_iniIndicates the initial nitration degree, omega, of the engine oil having the same number as the engine oil to be evaluatednit_endIndicating the nitration degree when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
11. The device of claim 8, wherein the obtaining module is further configured to obtain an initial metal element content of the engine oil with the same grade as the engine oil to be evaluated and a metal element content of the engine oil with the same grade as the engine oil to be evaluated when the engine oil is completely aged;
the conversion module is used for calculating the attenuation degree of the engine oil anti-wear performance of the engine oil to be evaluated according to the following formula:
wherein eta isantiIndicating the degree of attenuation, omega, of the antiwear properties of the engine oilanti_mRepresents the metal element content, omega, of the engine oil to be evaluatedanti_m_iniIndicates the initial metal element content, omega, of the engine oil having the same reference number as the engine oil to be evaluatedanti_m_endIndicates the content of the metal element when the engine oil having the same number as that of the engine oil to be evaluated is completely aged.
12. The device according to claim 8, wherein the obtaining module is further configured to obtain an initial oxidation degree/acid number of the engine oil having the same number as the engine oil to be evaluated, and an oxidation degree/acid number of the engine oil having the same number as the engine oil to be evaluated when the engine oil is completely aged;
the conversion module is used for calculating the engine oil oxidation degree of the engine oil to be evaluated according to the following formula:
wherein eta isoxiIndicating the degree of oxidation of the engine oil, omegaoxiRepresents the oxidation degree/acid value, omega, of the engine oil to be evaluatedoxi_iniIndicates the initial oxidation degree/acid value, ω, of the engine oil having the same number as that of the engine oil to be evaluatedoxi_endIndicates the oxidation degree/acid value at the time of complete aging of the engine oil having the same reference numeral as that of the engine oil to be evaluated.
13. The apparatus of any of claims 8 to 12, wherein the evaluation module is configured to calculate the degree of aging of the oil to be evaluated according to the following formula:
ηaging＝ψ1ηca+ψ2ηoxi+ψ3ηcd+ψ4ηanti，
wherein eta isagingIndicating the degree of ageing of the engine oil, etacaIndicating the degree of deterioration of the engine oil cleaning ability, etaoxiIndicates the degree of oxidation of the engine oil,. etacdIndicating the degree of contamination of the engine oil, etaantiIndicating the degree of attenuation of the antiwear properties of the engine oil,. psi1、ψ2、ψ3And psi4All values of (1) are [0,1 ]]And phi1+ψ2+ψ3+ψ4＝1。
14. The apparatus of claim 8 or 11, wherein the metal element content is an iron element content, or a copper element content, or a lead element content, or an aluminum element content, or a weighted average of iron, copper, lead and aluminum elements.
15. A terminal, characterized in that the apparatus comprises a processor and a memory; the memory stores therein a program that is loaded and executed by the processor to implement the oil aging degree evaluation method according to any one of claims 1 to 7.
16. A computer-readable storage medium, characterized in that a program is stored in the storage medium, which when executed by a processor, is used to implement the oil aging degree evaluation method according to any one of claims 1 to 7.
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