CN111271152A - Method and device for detecting service life of engine oil and vehicle - Google Patents
Method and device for detecting service life of engine oil and vehicle Download PDFInfo
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- CN111271152A CN111271152A CN202010181648.9A CN202010181648A CN111271152A CN 111271152 A CN111271152 A CN 111271152A CN 202010181648 A CN202010181648 A CN 202010181648A CN 111271152 A CN111271152 A CN 111271152A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
- F01M2011/14—Indicating devices; Other safety devices for indicating the necessity to change the oil
- F01M2011/148—Indicating devices; Other safety devices for indicating the necessity to change the oil by considering viscosity
Abstract
The invention provides a method and a device for detecting the service life of engine oil and a vehicle, wherein the method comprises the following steps: measuring the amount of engine oil flowing through a pipeline with a preset caliber in unit time; calculating the viscosity values of the engine oil at different using time points according to the amount of the engine oil, and calculating the change rate of the viscosity of the engine oil according to the viscosity values of the engine oil at the adjacent using time points; judging whether the change rate of the viscosity of the engine oil is greater than a set threshold value, if not, judging that the service life of the engine oil is short, and continuing to calculate the change rate of the viscosity of the engine oil according to the viscosity value of the engine oil at the next adjacent using time point until the change rate of the viscosity of the engine oil is greater than the set threshold value; if yes, the service life of the engine oil is judged to be up, and a user is prompted to replace the engine oil. The method and the device can measure the change rate of the viscosity of the engine oil quickly at low cost.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a method for detecting the service life of engine oil, a device for detecting the service life of the engine oil and a vehicle.
Background
At present, the popularization rate of automobiles in families is very high, the most important maintenance work in the daily use process of the automobiles is to replace engine oil, and once the service life of the engine oil is prolonged, unpredictable damage can be caused to vehicles of users. The common vehicle user generally only replaces the engine oil with a fixed kilometer number according to a vehicle maintenance manual, however, the service life of the engine oil is closely related to various factors such as the working mode of the vehicle engine, the type of the engine, the habit of the user in using the vehicle, the daily driving road conditions and the like besides the number of the running kilometers of the vehicle, and therefore, a certain potential safety hazard exists in the method of judging the service life of the engine oil by means of a single number of kilometers.
In the related art, one method for detecting the service life of the engine oil is to detect the impurity content of the engine oil through an engine oil test paper and judge whether the engine oil needs to be replaced according to the impurity content of the engine oil. This method is a rough way to determine the state of the oil simply by the amount of carbon particles and iron debris introduced by the combustion process of the engine, and is a rough way to visually observe the impurities. However, in the actual situation, the engine oil is repeatedly heated and cooled at high temperature under the severe working conditions of the engine, so that the engine oil is deteriorated, oxidized and thinned, impurities in the engine oil are not increased in the process, but the engine oil is actually oxidized and deteriorated, a good lubricating effect cannot be provided for the engine, and the engine oil state cannot be objectively and truly reflected basically. The other method is that the service life of the engine oil is detected by a professional instrument, an engine oil sample needs to be sent to a professional organization and a professional person uses the professional instrument to perform chemical detection, the detection process is complicated, the detection cost is extremely high, the engine oil sample is generally only used in an engine oil production link or a counterfeit and inferior engine oil identification link, and the engine oil sample detection method is not suitable for the scenes of daily vehicle use and maintenance of people.
Therefore, for a common user, the existing engine oil life detection method is difficult to objectively, conveniently and effectively judge whether the current engine oil state of the vehicle needs to be changed or not at low cost.
Disclosure of Invention
The invention provides a method and a device for detecting the service life of engine oil, which can effectively detect the service life of the engine oil through the change rate of the viscosity of the engine oil and can realize the detection of the service life of the engine oil in a shorter time and at a lower detection cost.
In a first aspect, an embodiment of the present invention provides a method for detecting a lifetime of engine oil, including:
measuring the amount of engine oil flowing through a pipeline with a preset caliber in unit time;
calculating the viscosity values of the engine oil at different using time points according to the amount of the engine oil, and calculating the change rate of the viscosity of the engine oil according to the viscosity values of the engine oil at the adjacent using time points;
judging whether the change rate of the viscosity of the engine oil is larger than a set threshold value,
if not, judging that the service life of the engine oil is short, and continuously calculating the change rate of the viscosity of the engine oil according to the viscosity value of the engine oil at the next adjacent service time point until the change rate is greater than a set threshold value;
if yes, the service life of the engine oil is judged to be up, and a user is prompted to replace the engine oil.
Further, the calculating the change rate of the oil viscosity according to the oil viscosity values of the adjacent using time points comprises:
the calculation formula of the change rate k of the viscosity of the engine oil is as follows:
k＝abs((yn+1-yn)/(tn+1-tn))
wherein abs represents an absolute value, n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity value of the engine oil;
alternatively, the first and second electrodes may be,
the rate of change f (t)' of the viscosity of the engine oil is calculated by the formula:
wherein n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity of the engine oil.
Further, the inner diameter of the pipeline with the preset caliber is 3-6 mm.
Further, the method for detecting the oil life further comprises the following steps:
and starting to calculate the oil viscosity value after the engine stops running for a preset time.
In a second aspect, an embodiment of the present invention provides an apparatus for detecting a lifetime of engine oil, including:
the measuring module is used for measuring the engine oil amount flowing through the pipeline with the preset caliber in unit time,
the calculation module is used for calculating the viscosity values of the engine oil at different using time points according to the amount of the engine oil and calculating the change rate of the viscosity of the engine oil according to the viscosity values of the engine oil at the adjacent using time points;
the judging module is used for judging whether the change rate of the viscosity of the engine oil is greater than a set threshold value or not;
if not, judging that the service life of the engine oil is short, and enabling the calculation module to continue to calculate the change rate of the viscosity of the engine oil according to the viscosity value of the engine oil at the next adjacent using time point until the change rate is larger than the set threshold value;
if yes, judging that the service life of the engine oil is up;
and the prompting module is used for prompting the user to replace the engine oil when the judging module judges that the change rate of the viscosity of the engine oil is greater than the set threshold value.
Further, the calculation module configured to calculate the rate of change of the oil viscosity from the oil viscosity values at adjacent points in time of use includes:
the calculation formula of the change rate k of the viscosity of the engine oil is as follows:
k＝abs((yn+1-yn)/(tn+1-tn))
wherein abs represents an absolute value, n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity value of the engine oil;
alternatively, the first and second electrodes may be,
the rate of change f (t)' of the viscosity of the engine oil is calculated by the formula:
wherein n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity of the engine oil.
Further, the inner diameter of the pipeline with the preset caliber is 3-6 mm.
In a third aspect, an embodiment of the present invention provides a vehicle on which the apparatus for detecting an oil life according to any one of the second aspects is mounted.
Has the advantages that:
according to the method, the device and the vehicle for detecting the service life of the engine oil, the viscosity of the engine oil is obtained by measuring the amount of the engine oil flowing through the pipeline with the preset caliber in unit time, the change rate of the viscosity of the engine oil is rapidly and low-cost measured by measuring the viscosity values of the engine oil at different using time points, the time when the viscosity of the engine oil suddenly changes in the using process is obtained, and a user is timely informed of changing the engine oil; the technical scheme of the invention provides two different engine oil viscosity change rate measuring methods to adapt to different engine oil quality requirement scenes, and realizes the engine oil service life detection with low cost and strong operability.
Drawings
FIG. 1 is a flow chart of a method for detecting a lifetime of engine oil according to an embodiment of the present invention;
FIG. 2 is a flow chart of another method for detecting oil life according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the change of viscosity of engine oil with time according to one embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for detecting a lifetime of engine oil according to a second embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail below with reference to the accompanying drawings and examples.
In which the terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The engine oil, namely engine lubricating oil, can play roles in lubricating, antifriction, auxiliary cooling, temperature reduction, sealing, leakage prevention, rust prevention, corrosion prevention, shock absorption, buffering and the like for the engine. Is known as the "blood" of the vehicle. However, the viscosity of the engine oil changes during the use process, and the viscosity is mainly affected by two aspects: firstly, receive the shearing action of shearing force, along with the extension of live time, the molecular chain that constitutes the machine oil can be cut off gradually, and the macromolecule becomes the micromolecule promptly to make viscosity reduce. The second is oxidation, which is the oxidation and condensation reaction with oxygen under the conditions of high temperature, high pressure and the existence of metal and acidic substances. The insufficient viscosity of the engine oil can cause the abrasion of the engine and shorten the service life of the engine, therefore, the most important measure of the service life of the engine oil is the viscosity of the engine oil, when the engine oil is used in a high-temperature and high-pressure environment of the engine for a period of time to be close to the service life of the engine, the condition that the viscosity of the engine oil is suddenly reduced (namely the engine oil is diluted from a viscous state) can occur, and if the viscosity of the engine oil is suddenly reduced, the lubricating capability of the engine oil is reduced, so that the insufficient lubrication and the accelerated abrasion among. If the vehicle is still driven to run under the state of engine oil dilution and low viscosity, the lubricating capability of the engine is directly reduced without timely engine oil replacement, so that parts of the engine are abraded, the service life of the engine is shortened, and even the engine is directly scrapped.
However, in the existing method for detecting the service life of the engine oil by detecting the impurity content of the engine oil through an engine oil test paper mode or a method for detecting the engine oil through a professional instrument, an engine oil sample is sent to a professional organization, and a professional instrument is used for carrying out chemical detection, so that the detection is too extensive and inaccurate, or the detection cost is too high and the method is not suitable for common users.
Therefore, in order to achieve the purpose of detecting the oil life with low cost and strong operability, the technical scheme of the present invention and how to solve the technical problem will be described in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a flowchart of a method for detecting an oil life according to an embodiment of the present invention, and as shown in fig. 1, the method for detecting an oil life includes:
step S101: measuring the amount of engine oil flowing through a pipeline with a preset caliber in unit time;
step S102: calculating the viscosity values of the engine oil at different using time points according to the amount of the engine oil, and calculating the change rate of the viscosity of the engine oil according to the viscosity values of the engine oil at the adjacent using time points;
step S103: judging whether the change rate of the viscosity of the engine oil is larger than a set threshold value,
if not, judging that the service life of the engine oil is short, and continuously calculating the change rate of the viscosity of the engine oil according to the viscosity value of the engine oil at the next adjacent service time point until the change rate is greater than a set threshold value;
if yes, the service life of the engine oil is judged to be up, and a user is prompted to replace the engine oil.
The viscosity y (ml/min) of the engine oil mentioned in the present invention is the outflow volume v (ml)/time t (min), i.e., the viscosity y of the engine oil represents the amount of the engine oil flowing through the predetermined fixed caliber size pipeline per unit time, and may also be referred to as a flow rate. The value of y is directly related to the aperture size and the pressure intensity of the pipeline, but the engine oil service life detection of the invention does not directly depend on the value of y, but judges according to the change rate of the value of y, finds out the time when the viscosity of the engine oil changes suddenly, and judges whether the engine oil reaches the service life, therefore, as long as the value of the pipeline aperture is proper and fixed, the detection of the engine oil service life is not influenced by the aperture size. Measuring the amount of engine oil flowing through a pipeline with a fixed caliber in unit time to calculate the viscosity value of the engine oil; and measuring and calculating the viscosity values of the engine oil at different engine oil use time points at intervals according to the same method.
In one embodiment of the embodiment, the method for measuring the viscosity of the engine oil comprises the steps of arranging an oil pot capable of storing the engine oil in an engine oil pipeline of an engine, wherein the engine oil can circulate from the oil pot and an engine bottom box through the engine oil pump when the engine runs, the oil pot can store about 500ml of the engine oil, the bottom of the oil pot is provided with a pipeline, the inner diameter of the pipeline is 3-6mm, an electronic flow measuring valve is arranged on the pipeline, the electronic flow measuring valve is only used for measuring the viscosity of the engine oil to run, after the engine stops running and is stable, the engine oil viscosity measuring module is started through power supply of a vehicle battery, the electronic flow measuring valve is started through a measuring module, the engine oil in the oil pot flows into the engine bottom box from the pipeline, the electronic flow measuring valve measures the flow rate of the engine oil in the pipeline and uploads the measured flow to a calculating module, and the time for stopping the engine is, so that the temperature of the oil remains the same or the temperature difference ranges within a certain value, e.g. +/-5 ℃, do not have too great an effect on the accuracy of the oil life detection.
In another embodiment of this embodiment, when the viscosity value of the engine oil needs to be measured, the temperature of the engine oil is generally 70-100 ℃, it is required to ensure that the temperature of the engine oil is the same or the temperature difference range is within a certain value, for example +/-5 ℃, when the engine oil is measured, the engine oil can be taken out into a fixed container, an engine oil outlet and a switch for controlling the outlet are arranged at the bottom of the container, a pipeline with a fixed caliber is connected to the outlet, the pipeline for each measurement is fixed, and it is ensured that the engine oil is clean and dry before the measurement, and the length of the pipeline can be set to 20-50 mm. The volume of the engine oil flowing out of the container in unit time is calculated, the unit time can be any value from 10 s to 300s, the engine oil is selected according to actual conditions, the viscosity of the engine oil is high, and the quantity of the engine oil taken out of the container can be kept basically the same when the engine oil is measured every time, so that the flowing speed of the engine oil, namely the quantity of the engine oil flowing through the pipeline with the fixed caliber in unit time is only related to the viscosity of the engine oil.
The engine oil viscosity values of different engine oil service times are measured through different time points of engine use, a change curve of the engine oil viscosity along with the service time can be obtained, the change rate of the engine oil viscosity can be obtained through different calculation methods, when the change rate of the engine oil viscosity is greatly changed, the engine oil can be considered to reach the service life, the engine oil viscosity value is suddenly reduced, namely the engine oil becomes thin from a viscous state or becomes very viscous suddenly, the engine oil viscosity value is increased, when the absolute value of the change rate of the engine oil viscosity is larger than a set threshold value, the engine oil is considered to have reached the service life, and a user is prompted to change the engine oil.
Further, the calculating the change rate of the oil viscosity according to the oil viscosity values of the adjacent using time points comprises:
the calculation formula of the change rate k of the viscosity of the engine oil is as follows:
k＝abs((yn+1-yn)/(tn+1-tn))
wherein abs represents an absolute value, n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity value of the engine oil;
alternatively, the first and second electrodes may be,
the rate of change f (t)' of the viscosity of the engine oil is calculated by the formula:
wherein n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity of the engine oil.
The rate of change of the viscosity of the oil may be represented by a slope or derivative of the change in the viscosity of the oil, and the rate of change of the viscosity of the oil may be represented by a slope of the viscosity value of the oil, as calculated by the slope calculation formula:
k＝abs((yn+1-yn)/(tn+1-tn))
obtaining the slope of the viscosity value of the engine oil, wherein k represents the slope of the viscosity value of the engine oil; alternatively, the first and second electrodes may be,
obtaining an engine oil viscosity change curve of the engine oil in the actual use process through a plurality of engine oil viscosity values measured at a plurality of time points, wherein the horizontal axis represents the measuring time points, and the vertical axis represents the measured engine oil viscosity values; the engine oil viscosity change rate is expressed by the derivative of the engine oil viscosity change curve, and the formula is calculated by the derivative:
and obtaining the derivative of the oil viscosity change curve, wherein f (t)' is the derivative of the oil viscosity change curve.
The two calculation methods can achieve the purpose of detecting the service life of the engine oil, but which calculation method is specifically used can be selected according to actual requirements:
the slope type calculation mode is suitable for civil vehicle types, the real-time requirement is not high, the use economy of the engine oil is considered, the measured time interval is relatively long, for example, 1 month or half month, and only when the measured viscosity of the engine oil begins to drop sharply, namely, the user is prompted to replace the engine oil at the position of the slope inflection point.
The derivative type calculation mode is suitable for use scenes with high real-time requirement, high requirement on the quality of the engine oil and no consideration of the cost of the engine oil, such as high-horsepower high-performance sports cars, racing cars and the like; the measuring time interval is relatively short, the values of the change of the viscosity of the engine oil along with the use time of the random oil are measured, the derivative of the viscosity change of the engine oil is obtained by fitting a curve or a multi-point derivation method, when the absolute value of the derivative is larger than a threshold value, the trend of the viscosity change of the engine oil is increased, a user is reminded to replace the engine oil, and the maximum protection can be provided for the performance vehicle engine with a high price.
Further, the inner diameter of the pipeline with the preset caliber is 3-6 mm.
The inner diameter of the oil flow rate measuring pipeline is controlled to be 3-6mm, preferably 4-5mm, so that the flow rate of the oil can be better measured, and the stable oil flow rate can be measured when the measured oil amount is 300-500 ml.
Further, the method for detecting the oil life further comprises the following steps:
and starting to calculate the oil viscosity value after the engine stops running for a preset time.
The viscosity of the engine oil is related to the temperature of the engine oil, so that the temperature of the engine oil is not greatly different in each calculation, and the engine oil is preferably measured after 30 minutes after the engine stops running.
Fig. 2 is a flowchart of another oil life detection method according to an embodiment of the present invention, as shown in fig. 2, the oil life detection method detects oil life in a slope calculation manner, and includes:
step S1: calculating timePoint tnViscosity value y of engine oiln＝vn/Tn；
Step S2: calculating the time tn+1Viscosity value y of engine oiln+1＝vn+1/Tn+1；
Step S3: computer oil viscosity change rate kn ═ abs ((y)n+1-yn)/(tn+1-tn))；
Step S4: judging whether the engine oil viscosity change rate kn is larger than a set threshold value, if not, making n equal to n +1, returning to the step S2, and measuring the next Tn+1(corresponding to originally T)n+2) Viscosity value at time point, and step S3, calculating new time point TnThe engine oil viscosity change rate of (1); if yes, the viscosity of the engine oil is considered to be changed excessively, and step S5 is executed;
step S5: and prompting the user to change the engine oil.
Wherein n is a positive integer, TnAnd Tn+1Respectively representing the measuring time points tnAnd tn+1Corresponding unit time, which takes the same value, vnIs a point of time tnMeasured oil volume, vn+1Is a point of time tn+1The measured oil volume.
In another embodiment of this embodiment, the lifetime of the engine oil is measured by a derivative calculation method, a change curve of the viscosity of the engine oil measured in an actual measurement process is shown in fig. 3, y is a measured viscosity value of the engine oil, T is a service life of the engine oil, for completely measuring a change characteristic of the viscosity value of the engine oil, the change curve of the viscosity of the engine oil is continuously measured for a period of time after the sudden change of the viscosity of the engine oil is found, the viscosity of the engine oil suddenly decreases at a time point T1, which indicates that the viscosity of the engine oil suddenly decreases and becomes fast, the viscosity of the engine oil reaches the lifetime, and when the engine oil is continuously used, the viscosity of the engine oil continuously decreases to a large extent, and the.
This embodiment is through measuring the machine oil volume that flows through the big or small pipeline of fixed bore in the unit interval, obtains the velocity of flow of machine oil, as the machine oil viscosity value to through measuring the machine oil viscosity value of a plurality of time points, quick, the low-cost rate of change of measuring machine oil viscosity, obtain machine oil in the use, the moment that the machine oil viscosity value takes place the sudden change, and machine oil from the time that the viscous state becomes thin, in time inform the user to change machine oil, guarantee engine normal use.
Fig. 4 is a schematic structural diagram of an apparatus for detecting a lifetime of engine oil according to a second embodiment of the present invention, as shown in fig. 4, the apparatus includes:
the measuring module 1 is used for measuring the engine oil amount flowing through the pipeline with the preset caliber in unit time,
the calculation module 2 is used for calculating the viscosity values of the engine oil at different using time points according to the amount of the engine oil and calculating the change rate of the viscosity of the engine oil according to the viscosity values of the engine oil at the adjacent using time points;
the judging module 3 is used for judging whether the change rate of the viscosity of the engine oil is greater than a set threshold value or not;
if not, judging that the service life of the engine oil is short, and enabling the calculation module 2 to continue to calculate the change rate of the viscosity of the engine oil according to the viscosity value of the engine oil at the next adjacent using time point until the change rate is larger than the set threshold value;
if yes, judging that the service life of the engine oil is up;
and the prompting module 4 is used for prompting the user to replace the engine oil when the judging module judges that the change rate of the viscosity of the engine oil is greater than the set threshold value.
The device for detecting the service life of the engine oil is also provided with a container, the lower part of the container is provided with a pipeline with a fixed caliber, and the container is used for containing the engine oil to be detected and enabling the engine oil to flow out of the pipeline with the fixed caliber;
the container can be an oil can, an oil can capable of storing engine oil is arranged in an engine oil pipeline of the engine, when the engine runs, the engine oil can circulate from the oil can and an engine bottom box through the engine oil pump, about 500ml of engine oil can be stored in the oil can, a pipeline is arranged at the bottom of the oil can, the inner diameter of the pipeline is 3-6mm, an electronic flow measuring valve is arranged on the pipeline, the engine oil in the oil can flows into the engine bottom box from the pipeline only when the viscosity of the engine oil is measured to run, after the engine stops running and is stable, a vehicle battery supplies power to start an engine oil viscosity value measuring module, the electronic flow measuring valve is started through a measuring module 1, the engine oil in the oil can flows into the engine bottom box from the pipeline, the electronic flow measuring valve measures the flow rate of the engine oil in the pipeline and uploads the measured flow rate to a calculating module, the time for stopping running of the engine is ensured to be approximately the same during each, e.g., +/-5 c, does not have much impact on the accuracy of the oil life detection.
Further, the calculation module 2 is configured to calculate the change rate of the oil viscosity according to the oil viscosity values of the adjacent using time points, and comprises:
the calculation formula of the change rate k of the viscosity of the engine oil is as follows:
k＝abs((yn+1-yn)/(tn+1-tn))
wherein abs represents an absolute value, n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity value of the engine oil;
alternatively, the first and second electrodes may be,
the rate of change f (t)' of the viscosity of the engine oil is calculated by the formula:
wherein n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity of the engine oil.
Further, the inner diameter of the pipeline with the preset caliber is 3-6 mm.
Since the embodiment of the apparatus is mainly used for implementing the method embodiment in the first embodiment, the description is simple, and related parts can be referred to the related description in the foregoing method embodiment, which is not described herein again.
The third embodiment of the invention also provides a vehicle, and the vehicle is provided with the device for detecting the service life of the engine oil as in any one of the second embodiment.
In the above embodiments of the present invention, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
It is to be understood that the above embodiments are merely exemplary embodiments employed for the purpose of illustrating the present invention, and the present invention is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (8)
1. A method of engine oil life detection, comprising:
measuring the amount of engine oil flowing through a pipeline with a preset caliber in unit time;
calculating the viscosity values of the engine oil at different using time points according to the amount of the engine oil, and calculating the change rate of the viscosity of the engine oil according to the viscosity values of the engine oil at the adjacent using time points;
judging whether the change rate of the viscosity of the engine oil is larger than a set threshold value,
if not, judging that the service life of the engine oil is short, and continuously calculating the change rate of the viscosity of the engine oil according to the viscosity value of the engine oil at the next adjacent service time point until the change rate is greater than a set threshold value;
if yes, the service life of the engine oil is judged to be up, and a user is prompted to replace the engine oil.
2. The method of oil life detection according to claim 1, wherein said calculating a rate of change of oil viscosity from oil viscosity values at adjacent points in time of use comprises:
the calculation formula of the change rate k of the viscosity of the engine oil is as follows:
k＝abs((yn+1-yn)/(tn+1-tn))
wherein abs represents an absolute value, n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity value of the engine oil;
alternatively, the first and second electrodes may be,
the rate of change f (t)' of the viscosity of the engine oil is calculated by the formula:
wherein n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity of the engine oil.
3. The method for detecting the oil life according to claim 1 or 2, wherein the inner diameter of the pipeline with the preset caliber size is 3-6 mm.
4. The method of oil life detection according to claim 1 or 2, further comprising:
and starting to calculate the oil viscosity value after the engine stops running for a preset time.
5. An apparatus for engine oil life detection, comprising:
the measuring module is used for measuring the engine oil amount flowing through the pipeline with the preset caliber in unit time,
the calculation module is used for calculating the viscosity values of the engine oil at different using time points according to the amount of the engine oil and calculating the change rate of the viscosity of the engine oil according to the viscosity values of the engine oil at the adjacent using time points;
the judging module is used for judging whether the change rate of the viscosity of the engine oil is greater than a set threshold value or not;
if not, judging that the service life of the engine oil is short, and enabling the calculation module to continue to calculate the change rate of the viscosity of the engine oil according to the viscosity value of the engine oil at the next adjacent using time point until the change rate is larger than the set threshold value;
if yes, judging that the service life of the engine oil is up;
and the prompting module is used for prompting the user to replace the engine oil when the judging module judges that the change rate of the viscosity of the engine oil is greater than the set threshold value.
6. The oil life detection device of claim 5, wherein the calculation module calculating the rate of change of oil viscosity from the oil viscosity values at adjacent points in time of use comprises:
the calculation formula of the change rate k of the viscosity of the engine oil is as follows:
k＝abs((yn+1-yn)/(tn+1-tn))
wherein abs represents an absolute value, n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity value of the engine oil;
alternatively, the first and second electrodes may be,
the rate of change f (t)' of the viscosity of the engine oil is calculated by the formula:
wherein n is a positive integer, yn+1Is a point of time tn+1Viscosity value of engine oil of ynIs a point of time tnThe viscosity of the engine oil.
7. The device for detecting the oil life according to claim 5 or 6, wherein the inner diameter of the pipeline with the preset caliber size is 3-6 mm.
8. A vehicle, characterized in that the vehicle is equipped with the oil life detection device according to any one of claims 5-7.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112580197A (en) * | 2020-12-04 | 2021-03-30 | 东风商用车有限公司 | Engine oil life estimation method and device |
| CN112682126A (en) * | 2020-12-24 | 2021-04-20 | 东风商用车有限公司 | Method and device for predicting viscosity of vehicle engine oil in real time |
| CN113418818A (en) * | 2021-06-16 | 2021-09-21 | 一汽奔腾轿车有限公司 | Engine oil dilution measuring method of high-pressure direct injection gasoline engine |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100122571A1 (en) * | 2008-11-19 | 2010-05-20 | Gm Global Technology Operations, Inc. | Method and system for estimating engine oil life based on viscosity |
| CN104564229A (en) * | 2013-10-15 | 2015-04-29 | 福特环球技术公司 | Viscosity detection using sump |
| CN105181530A (en) * | 2015-07-31 | 2015-12-23 | 吉林大学 | Engine machine oil viscosity on-line detection device and detection method |
| CN106370556A (en) * | 2016-08-17 | 2017-02-01 | 北京航空航天大学 | Viscosity analysis-based lubricating oil life on-line monitoring system and method |
| CN109653835A (en) * | 2018-12-24 | 2019-04-19 | 重庆金康新能源汽车设计院有限公司 | Detection method, detection system and the automobile of engine motor oil viscosity |
-
2020
- 2020-03-16 CN CN202010181648.9A patent/CN111271152A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100122571A1 (en) * | 2008-11-19 | 2010-05-20 | Gm Global Technology Operations, Inc. | Method and system for estimating engine oil life based on viscosity |
| CN104564229A (en) * | 2013-10-15 | 2015-04-29 | 福特环球技术公司 | Viscosity detection using sump |
| CN105181530A (en) * | 2015-07-31 | 2015-12-23 | 吉林大学 | Engine machine oil viscosity on-line detection device and detection method |
| CN106370556A (en) * | 2016-08-17 | 2017-02-01 | 北京航空航天大学 | Viscosity analysis-based lubricating oil life on-line monitoring system and method |
| CN109653835A (en) * | 2018-12-24 | 2019-04-19 | 重庆金康新能源汽车设计院有限公司 | Detection method, detection system and the automobile of engine motor oil viscosity |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112580197A (en) * | 2020-12-04 | 2021-03-30 | 东风商用车有限公司 | Engine oil life estimation method and device |
| CN112580197B (en) * | 2020-12-04 | 2022-10-14 | 东风商用车有限公司 | Engine oil life estimation method and device |
| CN112682126A (en) * | 2020-12-24 | 2021-04-20 | 东风商用车有限公司 | Method and device for predicting viscosity of vehicle engine oil in real time |
| CN113418818A (en) * | 2021-06-16 | 2021-09-21 | 一汽奔腾轿车有限公司 | Engine oil dilution measuring method of high-pressure direct injection gasoline engine |
| CN113418818B (en) * | 2021-06-16 | 2022-12-16 | 一汽奔腾轿车有限公司 | Method for measuring dilution of high-pressure direct injection gasoline engine oil |
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