CN113062786B - Control method and system for engine oil maintenance - Google Patents
Control method and system for engine oil maintenance Download PDFInfo
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- CN113062786B CN113062786B CN202110285207.8A CN202110285207A CN113062786B CN 113062786 B CN113062786 B CN 113062786B CN 202110285207 A CN202110285207 A CN 202110285207A CN 113062786 B CN113062786 B CN 113062786B
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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
- F01M11/12—Indicating devices; Other safety devices concerning lubricant level
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
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Abstract
The application discloses a control method and a system for engine oil maintenance, wherein the method comprises the following steps: obtaining engine oil maintenance parameters of the engine, storing the current date, the running mileage of the engine, the running time of the engine and the total oil consumption of the engine when the operation storage condition identifier of the diagnostic instrument is set, and storing the working time of the engine when the control unit of the engine is powered off; calculating a total maintenance coefficient in the current maintenance period according to the engine oil maintenance parameters and the storage content; and determining the quality degradation degree of the engine oil according to the total maintenance coefficient. The system comprises: the engine oil maintenance system comprises an engine oil maintenance parameter acquisition module, a storage module, a total maintenance coefficient calculation module and an engine oil quality degradation degree determination module. Through the method and the device, the accuracy and the calculation efficiency of the calculation of the total maintenance coefficient can be improved, and the quality degradation degree of the engine oil can be judged more accurately.
Description
Technical Field
The application relates to the technical field of diesel engine performance maintenance, in particular to a control method and a system for engine oil maintenance.
Background
With the development of the whole vehicle technology of the commercial vehicle, the user has higher requirements on the whole vehicle technology, comfort and humanization of the commercial vehicle. In particular, the maintenance technology of the lubricating oil of the diesel engine in the commercial vehicle is more and more concerned by users, so how to improve the maintenance quality of the lubricating oil of the diesel engine is an important technical problem.
Currently, the engine oil maintenance method for commercial vehicles generally utilizes an online oil sensor and an oil quality detection controller. The engine oil sensor is used for detecting oil product information of engine oil and the liquid level of the engine oil; the engine oil quality detection Controller receives data collected by an engine oil sensor and basic engine operation information collected by an engine ECU (Electronic Control Unit) which is in signal connection with the engine oil quality monitoring Controller through a CAN (Controller Area Network) bus, processes oil product information of the engine oil, judges whether the engine changes the engine oil or not through accuracy screening, judges whether wrong engine oil is added or not when the engine oil is changed, and sends alarm information when the wrong engine oil is added; and judging the quality degradation degree and the pollution condition of the engine oil through normalization and convergence treatment, and accurately reminding the engine to replace the engine oil according to the quality degradation degree of the engine oil.
However, in the current engine oil maintenance method, the collection of the engine oil information only includes the engine oil level and the oil product information, which is not comprehensive enough, so that the result of judging the degradation state of the engine oil quality is not accurate enough, that is, the accuracy of the engine oil maintenance control is not high enough.
Disclosure of Invention
The application provides a control method and a control system for engine oil maintenance, which aim to solve the problems that in the prior art, the accuracy of judgment of the degradation degree of the quality of engine oil is not high enough, and the accuracy of control of engine oil maintenance is not high enough.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
a method of controlling engine oil maintenance, the method comprising:
obtaining an oil maintenance parameter of an engine, the oil maintenance parameter comprising: the engine oil maintenance service system comprises an engine oil level, an engine oil temperature, an engine operating mileage, an engine operating time, a current date, an engine oil maintenance mileage limit, an engine oil maintenance operating time limit, an engine oil maintenance vehicle use date limit and a total engine oil consumption;
when the diagnostic instrument operation storage condition identifier is set, storing the current date, the engine running mileage, the engine running time and the total oil consumption of the engine, and when the engine control unit is powered off, storing the engine working time;
calculating a total maintenance coefficient in the current maintenance period according to the engine oil maintenance parameters and the storage content;
and determining the quality degradation degree of the engine oil according to the total maintenance coefficient.
Optionally, the obtaining an oil servicing parameter of the engine includes:
after the engine control unit is powered on and before the engine is started, or after a set time from the stop moment of the engine, acquiring the oil level according to a liquid level voltage signal of an oil level temperature sensor;
acquiring the temperature of the engine oil according to a temperature voltage signal of an engine oil level temperature sensor;
analyzing the VDHR information of the SAE J1939 message of the engine to obtain the running mileage of the engine;
analyzing HOURS information of an engine SAE J1939 message to obtain the running time of the engine;
analyzing engine SAE J1939 message LFC information to obtain total oil consumption of the engine;
analyzing the information of the engine SAE J1939 message TD to obtain the current date.
Optionally, after the engine control unit is powered on and before the engine is started, or after a set time from the time of stopping the engine, the engine oil level is obtained according to a level voltage signal of the engine oil level temperature sensor, including:
judging whether the temperature of the engine coolant and the engine speed meet the following conditions: the engine coolant temperature is less than a cooling threshold, and the engine speed is less than a starting speed threshold;
if yes, setting an oil level calculation identifier;
carrying out AD (Analog-to-Digital) sampling processing on the liquid level voltage signal to obtain the liquid level voltage signal after AD sampling;
determining the oil level by looking up a table according to the liquid level voltage signal after AD sampling and the liquid level characteristics of the oil level temperature sensor;
judging whether the difference value of the stored values of the engine working time and the engine running time EEPROM (Electrically Erasable Programmable Read-Only Memory, a storage chip with data not lost after power failure) is more than or equal to a set engine oil fall-back time threshold value or not;
if yes, setting an oil level calculation identifier;
carrying out AD sampling processing on the liquid level voltage signal to obtain the liquid level voltage signal after AD sampling;
and determining the oil level by looking up a table according to the liquid level voltage signal after AD sampling and the liquid level characteristics of the oil level temperature sensor.
Optionally, the method for calculating the total maintenance factor in the current maintenance cycle according to the oil maintenance parameter and the stored content includes:
calculating to obtain an engine running mileage maintenance coefficient according to the ratio of the engine running mileage in the current maintenance period to the engine oil maintenance mileage limit value;
calculating an engine running time maintenance coefficient according to the ratio of the engine running time in the current maintenance period to the engine oil maintenance running time limit value;
calculating a maintenance coefficient of the service date and time of the engine according to the ratio of the service date and time of the vehicle in the current maintenance period to the service date and time limit value of the engine oil maintenance vehicle;
determining an engine oil level maintenance coefficient according to the engine oil level signal and the set threshold value;
obtaining an engine oil level maintenance correction coefficient through table lookup according to the engine oil level signal;
obtaining an engine oil temperature maintenance correction coefficient through table lookup according to the engine oil temperature signal;
obtaining the maintenance correction coefficient of the average oil consumption of the engine through table look-up according to the average oil consumption of the engine per hundred kilometers;
calculating a maintenance coefficient after correction based on mileage according to the product of the engine mileage basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the average oil consumption maintenance correction coefficient of the engine;
calculating a corrected maintenance coefficient based on the vehicle running time according to the product of the vehicle running time basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the average oil consumption maintenance correction coefficient of the engine;
the maximum value of the engine use date and time maintenance coefficient, the engine oil level maintenance coefficient, the mileage-based corrected maintenance coefficient, and the vehicle operation time-based corrected maintenance coefficient is taken and defined as a total maintenance coefficient.
Optionally, the determining an oil level maintenance factor according to the oil level signal and the size of the set threshold includes:
when the engine oil level signal is greater than or equal to a first set threshold value, the engine oil level maintenance coefficient value is 0;
when the engine oil level signal is greater than a second set threshold and less than a first set threshold, the engine oil level maintenance coefficient value is 1, wherein the second set threshold is less than the first set threshold;
and when the engine oil level signal is less than or equal to a second set threshold value, the engine oil level maintenance coefficient value is 2.
Optionally, the method for outputting the quality degradation degree of the engine oil according to the total maintenance coefficient comprises the following steps:
when the total maintenance coefficient is less than or equal to a third set threshold value, judging that the engine oil of the engine is normal and no maintenance is needed;
when the total maintenance coefficient is larger than a third set threshold and smaller than a fourth set threshold, determining that the engine oil of the engine is abnormal and needs to be maintained as soon as possible;
and when the total maintenance coefficient is larger than or equal to a fourth set threshold value, judging that the engine oil is abnormal and needs immediate maintenance.
A control system for engine oil maintenance, the control system comprising:
an oil maintenance parameter acquisition module for acquiring oil maintenance parameters of an engine, the oil maintenance parameters including: the engine oil maintenance service system comprises an engine oil level, an engine oil temperature, an engine operating mileage, an engine operating time, a current date, an engine oil maintenance mileage limit, an engine oil maintenance operating time limit, an engine oil maintenance vehicle use date limit and a total engine oil consumption;
the storage module is used for storing the current date, the running mileage of the engine, the running time of the engine and the total oil consumption of the engine when the operation storage condition identifier of the diagnostic instrument is set, and storing the working time of the engine when the control unit of the engine is powered off;
the total maintenance coefficient calculation module is used for calculating a total maintenance coefficient in the current maintenance period according to the engine oil maintenance parameters and the storage content;
and the engine oil quality degradation degree determining module is used for determining the engine oil quality degradation degree according to the total maintenance coefficient.
Optionally, the engine oil maintenance parameter obtaining module includes:
the engine oil liquid level acquisition unit is used for acquiring the engine oil liquid level according to the liquid level voltage signal of the engine oil liquid level temperature sensor after the engine control unit is electrified and before the engine is started or after the set time from the stop moment of the engine;
the engine oil temperature acquisition unit is used for acquiring the engine oil temperature according to the temperature voltage signal of the engine oil liquid level temperature sensor;
the engine running mileage acquisition unit is used for analyzing the information of the engine SAE J1939 message VDHR and acquiring the engine running mileage;
the engine running time acquisition unit is used for analyzing engine SAE J1939 message HOURS information and acquiring the engine running time;
the engine total oil consumption acquisition unit is used for analyzing engine SAE J1939 message LFC information to acquire the total oil consumption of the engine;
and the current date acquisition unit is used for analyzing the information of the engine SAE J1939 message TD to acquire the current date.
Optionally, the total maintenance factor calculation module includes:
the engine operating mileage maintenance coefficient calculation unit is used for calculating an engine operating mileage maintenance coefficient according to the ratio of the engine operating mileage in the current maintenance period to the engine oil maintenance mileage limit value;
the engine running time maintenance coefficient calculation unit is used for calculating an engine running time maintenance coefficient according to the ratio of the engine running time in the current maintenance period to the engine oil maintenance running time limit value;
the engine service date and time maintenance coefficient calculation unit is used for calculating a service date and time maintenance coefficient of the engine according to the ratio of the vehicle service date and time to the service date limit value of the engine oil maintenance vehicle in the current maintenance period;
the engine oil liquid level maintenance coefficient determining unit is used for determining the engine oil liquid level maintenance coefficient according to the engine oil liquid level signal and the set threshold value;
the engine oil liquid level maintenance correction coefficient determining unit is used for obtaining an engine oil liquid level maintenance correction coefficient through table lookup according to the engine oil liquid level signal;
the engine oil temperature maintenance correction coefficient determining unit is used for obtaining an engine oil temperature maintenance correction coefficient through table lookup according to the engine oil temperature signal;
the engine average oil consumption maintenance correction coefficient determining unit is used for obtaining the engine average oil consumption maintenance correction coefficient through table lookup according to the hundred kilometers of the average oil consumption of the engine;
the mileage-based corrected maintenance coefficient calculation unit is used for calculating a mileage-based corrected maintenance coefficient according to the product of an engine mileage basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the engine average oil consumption maintenance correction coefficient;
the corrected maintenance coefficient calculation unit is used for calculating a corrected maintenance coefficient based on the vehicle running time according to the product of a vehicle running time basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the average oil consumption maintenance correction coefficient of the engine;
and a total maintenance coefficient determination unit for taking the maximum value of the engine use date and time maintenance coefficient, the oil level maintenance coefficient, the mileage-based corrected maintenance coefficient and the vehicle operation time-based corrected maintenance coefficient, and defining the maximum value as the total maintenance coefficient.
Optionally, the control system further includes: and the display module is used for outputting and displaying the quality degradation degree of the engine oil.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
the application provides a control method for engine oil maintenance, which is characterized in that engine oil maintenance parameters of an engine are firstly obtained, so that the subsequent calculation of a total maintenance coefficient is facilitated. Secondly, when the diagnostic device operates the storage condition identifier and sets, partial oil maintenance parameters are stored, and the working time of the engine is stored when the control unit is powered off, so that the parameters can be linked and shared between the front maintenance cycle and the rear maintenance cycle in time, and the accuracy of oil maintenance control and the calculation efficiency of the total maintenance coefficient are improved. And then calculating a total maintenance coefficient in the current maintenance period according to the engine oil maintenance parameters and the stored content, and finally determining the quality degradation degree of the engine oil according to the total maintenance coefficient.
The engine oil maintenance parameters input in the embodiment are not limited to the engine oil level and the engine oil temperature of the engine, and further comprise the engine running mileage, the running time, the date, various limit values and the total oil consumption of the engine, the input engine oil maintenance parameters are more comprehensive, the calculation of the subsequent total maintenance coefficient is more accurate, the accuracy of the judgment result of the degradation state of the engine oil quality is greatly improved, and the accuracy of the engine oil maintenance control is further improved. The total maintenance coefficient is calculated by referring to the engine oil maintenance parameters and considering the related parameters stored when the diagnostic instrument operates the storage condition identifier and sets, and the related parameters in the current period and the partial parameters in the previous maintenance period can be combined for calculation, so that the total maintenance coefficient is more fit with the actual condition of the engine oil, and the quality degradation degree of the engine oil can be more accurately judged.
The present application further provides a control system for engine oil maintenance, which mainly comprises: the engine oil maintenance system comprises an engine oil maintenance parameter acquisition module, a storage module, a total maintenance coefficient calculation module and an engine oil quality degradation degree determination module. More parameters can be input through the engine oil maintenance parameter acquisition module, so that the engine oil maintenance parameters are more comprehensive, the calculation of the follow-up total maintenance coefficient is more accurate, the accuracy of the judgment result of the degradation state of the quality of the engine oil is greatly improved, and the accuracy of the engine oil maintenance control is further improved. The storage module is arranged, so that parameters of the current maintenance period and the previous and subsequent maintenance periods can be shared, and the accuracy and the efficiency of calculation of the total maintenance coefficient are improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating a method for controlling engine oil maintenance according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a control system for engine oil maintenance according to an embodiment of the present disclosure.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. 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.
For a better understanding of the present application, embodiments of the present application are explained in detail below with reference to the accompanying drawings.
Example one
Referring to fig. 1, fig. 1 is a schematic flowchart of a control method for engine oil maintenance according to an embodiment of the present disclosure. As can be seen from fig. 1, the control method for engine oil maintenance in this embodiment mainly includes the following steps:
s1: and acquiring engine oil maintenance parameters of the engine.
The engine oil maintenance parameters in this embodiment include, in addition to the engine oil level and the engine oil temperature: the engine operating mileage, the engine operating time, the current date, the engine oil maintenance mileage limit, the engine oil maintenance operating time limit, the engine oil maintenance vehicle use date limit, and the total oil consumption of the engine. The engine oil maintenance mileage limit value, the engine oil maintenance operation time limit value and the engine oil maintenance vehicle use date limit value are determined according to different vehicle types and engine types. The running mileage and running time of the engine can be obtained by an automobile running recorder. The engine oil maintenance parameters in the embodiment are more comprehensive, more basis is provided for the calculation of the follow-up total maintenance coefficient, and the accuracy of the calculation of the total maintenance coefficient is improved.
Further, the method for obtaining the oil maintenance parameter of the engine in the embodiment further includes the following processes:
s11: and after the engine control unit is electrified and before the engine is started, or after the set time from the stop moment of the engine, the oil level is obtained according to the liquid level voltage signal of the oil level temperature sensor.
Specifically, step S11 further includes:
s111: judging whether the temperature of the engine coolant and the engine speed meet the following conditions: the engine coolant temperature is less than a cooling threshold and the engine speed is less than a cranking speed threshold.
If the engine coolant temperature is less than the cooling threshold and the engine speed is less than the start-up speed threshold, step S112 is executed: an oil level calculation identifier is set.
Otherwise, the oil level calculation identifier is not set.
S113: and carrying out AD sampling processing on the liquid level voltage signal to obtain the liquid level voltage signal after AD sampling.
S114: and determining the oil level by looking up a table according to the liquid level voltage signal after AD sampling and the liquid level characteristics of the oil level temperature sensor.
S115: and judging whether the difference value of the stored values of the EEPROM of the engine working time and the engine running time is more than or equal to the set engine oil drop-back time threshold value.
If the difference value between the stored values of the engine working time and the engine running time EEPROM is greater than or equal to the set oil drop-back time threshold value, executing step S116: if yes, setting an oil level calculation identifier; .
Otherwise, the oil level calculation identifier is not set.
S117: carrying out AD sampling processing on the liquid level voltage signal to obtain the liquid level voltage signal after AD sampling;
s118: and determining the oil level by looking up a table according to the liquid level voltage signal after AD sampling and the liquid level characteristics of the oil level temperature sensor.
The acquisition of engine oil liquid level in this embodiment mainly includes two different time quantums, and engine control unit is gone up the electricity back and before the engine starts, acquires the engine oil liquid level according to engine oil liquid level temperature sensor's liquid level voltage signal, can avoid the rotation after the engine starts to lead to the engine oil liquid level to splash to improve the accuracy that the engine oil liquid level acquireed. The engine oil level signal is acquired after the set time is started at the stop moment of the engine, namely the engine oil level is calculated after the engine is stopped after the set time, so that the situation that engine oil is not completely fallen back to an engine oil pan due to the fact that the engine is just stopped can be avoided, and the accuracy of engine oil level measurement is improved.
S12: and acquiring the temperature of the engine oil according to the temperature voltage signal of the engine oil level temperature sensor.
In this embodiment, machine oil liquid level and machine oil temperature can all acquire through machine oil liquid level temperature sensor, only gathers different signals through machine oil liquid level temperature sensor.
S13: and analyzing the VDHR information of the SAE J1939 message of the engine to obtain the running mileage of the engine.
S14: analyzing the HOURS information of the SAE J1939 message of the engine to obtain the running time of the engine.
S15: and analyzing the LFC information of the SAE J1939 message of the engine to obtain the total oil consumption of the engine.
S16: analyzing the information of the engine SAE J1939 message TD to obtain the current date.
The steps S11-S16 have no fixed sequence, and may be adjusted accordingly according to actual conditions. In summary, in this embodiment, engine oil maintenance parameters are used as input signals, and the engine oil maintenance parameters CAN be input to the CPU of the controller through the vehicle driving recorder, the engine-related CAN messages, and the engine oil level temperature sensor respectively in the CAN form and the AD sampling form, and corresponding input information is obtained through the CAN analysis and the signal processing calculation of the CPU.
With continued reference to fig. 1, S2: when the diagnostic instrument operation storage condition identifier is set, the current date, the engine operating mileage, the engine operating time and the total engine oil consumption are stored, and when the engine control unit is powered off, the engine operating time is stored.
In this embodiment, when the diagnostic apparatus operates the storage condition identifier to set, the partial oil maintenance parameter is stored, and after maintenance, the storage condition identifier is set and reset, so that the maintenance coefficient calculation of the next maintenance cycle is realized. In this embodiment, the engine operating time is also stored when the engine control unit is de-energized for subsequent oil level calculation enabling conditions. In the embodiment, the method for storing various parameters can adopt EEPROM for storage, which is beneficial to improving the storage efficiency and the storage reliability.
With continued reference to fig. 1, after obtaining the oil maintenance parameters and storing the related parameters, step S3 is executed: and calculating the total maintenance coefficient in the current maintenance period according to the engine oil maintenance parameters and the stored content.
Specifically, step S3 includes the following processes:
s30: and calculating to obtain the maintenance coefficient of the running mileage of the engine according to the ratio of the running mileage of the engine to the engine oil maintenance mileage limit value in the current maintenance period.
The number of mileage operated by the engine in the current maintenance period can be determined according to the difference between the current mileage operated by the engine displayed by the automobile running recorder and the mileage of the last maintenance period stored by the EEPROM.
S31: and calculating the maintenance coefficient of the running time of the engine according to the ratio of the running time of the engine in the current maintenance period to the limit value of the maintenance running time of the engine oil.
The running time of the engine in the current maintenance period can be calculated according to the difference between the current running time of the engine displayed by the automobile running recorder and the running mileage of the engine which is stored in the EEPROM and completes maintenance in the last maintenance period.
S32: and calculating the maintenance coefficient of the service date and time of the engine according to the ratio of the service date and time of the vehicle in the current maintenance period to the service date and time limit value of the vehicle for engine oil maintenance.
The service date and time of the vehicle in the current maintenance period can be determined according to the current date and the last maintenance completion date stored in the EEPROM.
S33: and determining the engine oil level maintenance coefficient according to the engine oil level signal and the set threshold value.
Specifically, step S33 includes the following processes:
s331: and when the engine oil level signal is greater than or equal to a first set threshold value, the engine oil level maintenance coefficient value is 0.
When the engine oil level signal is greater than or equal to a first set threshold value, the engine oil is not lost, and the state that the engine oil is not lost is represented by the engine oil level maintenance coefficient value of 0.
S332: and when the engine oil liquid level signal is greater than the second set threshold and less than the first set threshold, the engine oil liquid level maintenance coefficient value is 1. Wherein the second set threshold is less than the first set threshold.
When the engine oil level signal is greater than the second set threshold and less than the first set threshold, the engine oil is slightly lost, and the state of the engine oil slightly lost is represented by the engine oil level maintenance coefficient value being 1.
S333: and when the engine oil level signal is less than or equal to a second set threshold value, the engine oil level maintenance coefficient value is 2.
When the engine oil level signal is less than or equal to a second set threshold value, the engine oil is seriously lost, and the state of the serious engine oil loss is represented by the condition that the engine oil level maintenance coefficient is 2.
S34: and obtaining the engine oil level maintenance correction coefficient through table lookup according to the engine oil level signal.
S35: and obtaining the engine oil temperature maintenance correction coefficient through table lookup according to the engine oil temperature signal.
S36: and obtaining the maintenance correction coefficient of the average oil consumption of the engine through table look-up according to the average oil consumption of the engine per hundred kilometers.
S37: and calculating a maintenance coefficient after correction based on the mileage according to the product of the engine mileage basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the average oil consumption maintenance correction coefficient of the engine.
S38: and calculating a corrected maintenance coefficient based on the vehicle running time according to the product of the vehicle running time basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the average oil consumption maintenance correction coefficient of the engine.
S39: the maximum value of the engine use date and time maintenance coefficient, the engine oil level maintenance coefficient, the mileage-based corrected maintenance coefficient, and the vehicle operation time-based corrected maintenance coefficient is taken and defined as a total maintenance coefficient.
With continued reference to fig. 1, after the total maintenance factor is calculated, step S4 is executed: and determining the quality degradation degree of the engine oil according to the total maintenance coefficient.
Specifically, step S4 includes:
s41: and when the total maintenance coefficient is less than or equal to a third set threshold value, judging that the engine oil is normal without maintenance.
S42: and when the total maintenance coefficient is larger than the third set threshold and smaller than the fourth set threshold, determining that the engine oil is abnormal and needs to be maintained as soon as possible.
S43: and when the total maintenance coefficient is larger than or equal to a fourth set threshold value, judging that the engine oil is abnormal and needs immediate maintenance.
Through a lot of experiments by the inventor, the third set threshold value in this embodiment is 0.9, and the fourth set threshold value is 1.1. The values of the third set threshold and the fourth set threshold can more accurately judge the engine oil degradation condition of the engine, and are convenient to popularize and use.
Further, in the present embodiment, after determining the degradation degree of the engine oil quality according to the total maintenance factor, the method further includes step S5: and outputting and displaying the quality degradation degree of the engine oil.
The maintenance identification can be combined with the instrument display. Specifically, step S5 includes the following processes:
s51: when engine oil of the engine is normal and maintenance is not needed, the maintenance identifier is set to be 0, the instrument indicator light is not on, and the instrument outputs characters to display that the engine oil of the transmitter is normal and maintenance is not needed;
s52: when engine oil is abnormal and needs to be maintained as soon as possible, the maintenance identifier is set to be 1, a yellow indicator lamp in the instrument is on, and the instrument outputs characters to display that the engine oil is abnormal and needs to be maintained as soon as possible;
s53: when the engine oil is abnormal and needs to be maintained immediately, the maintenance identifier is set to be 2, the red indicator lamp in the meter is lightened, and the meter outputs characters to display that the engine oil is abnormal and needs to be maintained immediately.
Through outputting and displaying the quality degradation degree of the engine oil, the engine oil maintenance control method is more intuitive and is beneficial to improving user experience.
Example two
Referring to fig. 2 based on the embodiment shown in fig. 1, fig. 2 is a schematic structural diagram of a control system for engine oil maintenance according to an embodiment of the present disclosure. As can be seen from fig. 2, the control system for engine oil maintenance in the present embodiment mainly includes: the engine oil maintenance system comprises an engine oil maintenance parameter acquisition module, a storage module, a total maintenance coefficient calculation module and an engine oil quality degradation degree determination module.
Wherein, machine oil maintenance parameter acquisition module for acquire the machine oil maintenance parameter of engine, machine oil maintenance parameter includes: the engine oil maintenance service system comprises an engine oil level, an engine oil temperature, an engine operating mileage, an engine operating time, a current date, an engine oil maintenance mileage limit, an engine oil maintenance operating time limit, an engine oil maintenance vehicle use date limit and a total engine oil consumption; the storage module is used for storing the current date, the running mileage of the engine, the running time of the engine and the total oil consumption of the engine when the operation storage condition identifier of the diagnostic instrument is set, and storing the working time of the engine when the control unit of the engine is powered off; the total maintenance coefficient calculation module is used for calculating a total maintenance coefficient in the current maintenance period according to the engine oil maintenance parameters and the storage content; and the engine oil quality degradation degree determining module is used for determining the engine oil quality degradation degree according to the total maintenance coefficient.
The engine oil maintenance parameter acquisition module includes: the device comprises an engine oil liquid level acquisition unit, an engine oil temperature acquisition unit, an engine operating mileage acquisition unit, an engine operating time acquisition unit, an engine total oil consumption acquisition unit and a current date acquisition unit.
The engine oil level acquisition unit is used for acquiring the engine oil level according to a level voltage signal of the engine oil level temperature sensor after the engine control unit is powered on and before the engine is started or after a set time from the stop moment of the engine; the engine oil temperature acquisition unit is used for acquiring the engine oil temperature according to the temperature voltage signal of the engine oil liquid level temperature sensor; the engine running mileage acquisition unit is used for analyzing the information of the engine SAE J1939 message VDHR and acquiring the engine running mileage; the engine running time acquisition unit is used for analyzing engine SAE J1939 message HOURS information and acquiring the engine running time; the engine total oil consumption acquisition unit is used for analyzing engine SAE J1939 message LFC information to acquire the total oil consumption of the engine; and the current date acquisition unit is used for analyzing the information of the engine SAE J1939 message TD and acquiring the current date.
The total maintenance factor calculation module comprises: the system comprises an engine running mileage maintenance coefficient calculation unit, an engine running time maintenance coefficient calculation unit, an engine use date and time maintenance coefficient calculation unit, an oil level maintenance coefficient determination unit, an oil level maintenance correction coefficient determination unit, an oil temperature maintenance correction coefficient determination unit, an engine average oil consumption maintenance correction coefficient determination unit, a maintenance coefficient calculation unit after mileage correction, a maintenance coefficient calculation unit after vehicle running time correction and a total maintenance coefficient determination unit.
The engine operating mileage maintenance coefficient calculation unit is used for calculating an engine operating mileage maintenance coefficient according to the ratio of the engine operating mileage in the current maintenance period to the engine oil maintenance mileage limit value; the engine running time maintenance coefficient calculation unit is used for calculating an engine running time maintenance coefficient according to the ratio of the engine running time in the current maintenance period to the engine oil maintenance running time limit value; the engine service date and time maintenance coefficient calculation unit is used for calculating a service date and time maintenance coefficient of the engine according to the ratio of the vehicle service date and time to the service date limit value of the engine oil maintenance vehicle in the current maintenance period; the engine oil liquid level maintenance coefficient determining unit is used for determining the engine oil liquid level maintenance coefficient according to the engine oil liquid level signal and the set threshold value; the engine oil liquid level maintenance correction coefficient determining unit is used for obtaining an engine oil liquid level maintenance correction coefficient through table lookup according to the engine oil liquid level signal; the engine oil temperature maintenance correction coefficient determining unit is used for obtaining an engine oil temperature maintenance correction coefficient through table lookup according to the engine oil temperature signal; the engine average oil consumption maintenance correction coefficient determining unit is used for obtaining the engine average oil consumption maintenance correction coefficient through table lookup according to the hundred kilometers of the average oil consumption of the engine; the mileage-based corrected maintenance coefficient calculation unit is used for calculating a mileage-based corrected maintenance coefficient according to the product of the engine mileage basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the engine average oil consumption maintenance correction coefficient; the maintenance coefficient calculation unit after correction based on the vehicle running time is used for calculating a maintenance coefficient after correction based on the vehicle running time according to the product of a vehicle running time basic coefficient, an engine oil level maintenance correction coefficient, an engine oil temperature maintenance correction coefficient and an engine average oil consumption maintenance correction coefficient; and a total maintenance coefficient determination unit for taking the maximum value of the engine use date and time maintenance coefficient, the oil level maintenance coefficient, the mileage-based corrected maintenance coefficient and the vehicle operation time-based corrected maintenance coefficient, and defining the maximum value as the total maintenance coefficient.
Further, the control system for engine oil maintenance of the present embodiment further includes a display module for outputting and displaying the quality degradation degree of the engine oil.
For parts of this embodiment that are not described in detail, reference may be made to the first embodiment shown in fig. 1, and reference may be made between the two embodiments, which are not described herein again.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A method of controlling engine oil maintenance, the method comprising:
obtaining an oil maintenance parameter of an engine, the oil maintenance parameter comprising: the engine oil maintenance service system comprises an engine oil level, an engine oil temperature, an engine operating mileage, an engine operating time, a current date, an engine oil maintenance mileage limit, an engine oil maintenance operating time limit, an engine oil maintenance vehicle use date limit and a total engine oil consumption;
when the diagnostic instrument operation storage condition identifier is set, storing the current date, the engine running mileage, the engine running time and the total oil consumption of the engine, and when the engine control unit is powered off, storing the engine working time;
calculating a total maintenance coefficient in the current maintenance period according to the engine oil maintenance parameters and the storage content;
determining the quality degradation degree of the engine oil according to the total maintenance coefficient;
outputting and displaying the quality degradation degree of the engine oil;
the method for calculating the total maintenance coefficient in the current maintenance period according to the engine oil maintenance parameters and the storage content comprises the following steps:
calculating to obtain an engine running mileage maintenance coefficient according to the ratio of the engine running mileage in the current maintenance period to the engine oil maintenance mileage limit value;
calculating an engine running time maintenance coefficient according to the ratio of the engine running time in the current maintenance period to the engine oil maintenance running time limit value;
calculating a maintenance coefficient of the service date and time of the engine according to the ratio of the service date and time of the vehicle in the current maintenance period to the service date and time limit value of the engine oil maintenance vehicle;
determining an engine oil level maintenance coefficient according to the engine oil level signal and the set threshold value;
obtaining an engine oil level maintenance correction coefficient through table lookup according to the engine oil level signal;
obtaining an engine oil temperature maintenance correction coefficient through table lookup according to the engine oil temperature signal;
obtaining the maintenance correction coefficient of the average oil consumption of the engine through table look-up according to the average oil consumption of the engine per hundred kilometers;
calculating a maintenance coefficient after correction based on mileage according to the product of the engine mileage basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the average oil consumption maintenance correction coefficient of the engine;
calculating a corrected maintenance coefficient based on the vehicle running time according to the product of the vehicle running time basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the average oil consumption maintenance correction coefficient of the engine;
the maximum value of the engine use date and time maintenance coefficient, the engine oil level maintenance coefficient, the mileage-based corrected maintenance coefficient, and the vehicle operation time-based corrected maintenance coefficient is taken and defined as a total maintenance coefficient.
2. The method of claim 1, wherein the obtaining engine oil servicing parameters comprises:
after the engine control unit is powered on and before the engine is started, or after a set time from the stop moment of the engine, acquiring the oil level according to a liquid level voltage signal of an oil level temperature sensor;
acquiring the temperature of the engine oil according to a temperature voltage signal of an engine oil level temperature sensor;
analyzing the VDHR information of the SAE J1939 message of the engine to obtain the running mileage of the engine;
analyzing HOURS information of an engine SAE J1939 message to obtain the running time of the engine;
analyzing engine SAE J1939 message LFC information to obtain total oil consumption of the engine;
analyzing the information of the engine SAE J1939 message TD to obtain the current date.
3. The method of claim 1, wherein determining the oil level maintenance factor based on the oil level signal and the predetermined threshold comprises:
when the engine oil level signal is greater than or equal to a first set threshold value, the engine oil level maintenance coefficient value is 0;
when the engine oil level signal is greater than a second set threshold and less than a first set threshold, the engine oil level maintenance coefficient value is 1, wherein the second set threshold is less than the first set threshold;
and when the engine oil level signal is less than or equal to a second set threshold value, the engine oil level maintenance coefficient value is 2.
4. The method of claim 1, wherein the step of outputting the degree of quality degradation of the engine oil based on the total maintenance factor comprises:
when the total maintenance coefficient is less than or equal to a third set threshold value, judging that the engine oil of the engine is normal and no maintenance is needed;
when the total maintenance coefficient is larger than a third set threshold and smaller than a fourth set threshold, determining that the engine oil of the engine is abnormal and needs to be maintained as soon as possible;
and when the total maintenance coefficient is larger than or equal to a fourth set threshold value, judging that the engine oil is abnormal and needs immediate maintenance.
5. A control system for engine oil maintenance, the control system comprising:
an oil maintenance parameter acquisition module for acquiring oil maintenance parameters of an engine, the oil maintenance parameters including: the engine oil maintenance service system comprises an engine oil level, an engine oil temperature, an engine operating mileage, an engine operating time, a current date, an engine oil maintenance mileage limit, an engine oil maintenance operating time limit, an engine oil maintenance vehicle use date limit and a total engine oil consumption;
the storage module is used for storing the current date, the running mileage of the engine, the running time of the engine and the total oil consumption of the engine when the operation storage condition identifier of the diagnostic instrument is set, and storing the working time of the engine when the control unit of the engine is powered off;
the total maintenance coefficient calculation module is used for calculating a total maintenance coefficient in the current maintenance period according to the engine oil maintenance parameters and the storage content;
the engine oil quality degradation degree determining module is used for determining the engine oil quality degradation degree according to the total maintenance coefficient;
the control system further comprises: the display module is used for outputting and displaying the quality degradation degree of the engine oil;
wherein the total maintenance factor calculation module comprises:
the engine operating mileage maintenance coefficient calculation unit is used for calculating an engine operating mileage maintenance coefficient according to the ratio of the engine operating mileage in the current maintenance period to the engine oil maintenance mileage limit value;
the engine running time maintenance coefficient calculation unit is used for calculating an engine running time maintenance coefficient according to the ratio of the engine running time in the current maintenance period to the engine oil maintenance running time limit value;
the engine service date and time maintenance coefficient calculation unit is used for calculating a service date and time maintenance coefficient of the engine according to the ratio of the vehicle service date and time to the service date limit value of the engine oil maintenance vehicle in the current maintenance period;
the engine oil liquid level maintenance coefficient determining unit is used for determining the engine oil liquid level maintenance coefficient according to the engine oil liquid level signal and the set threshold value;
the engine oil liquid level maintenance correction coefficient determining unit is used for obtaining an engine oil liquid level maintenance correction coefficient through table lookup according to the engine oil liquid level signal;
the engine oil temperature maintenance correction coefficient determining unit is used for obtaining an engine oil temperature maintenance correction coefficient through table lookup according to the engine oil temperature signal;
the engine average oil consumption maintenance correction coefficient determining unit is used for obtaining the engine average oil consumption maintenance correction coefficient through table lookup according to the hundred kilometers of the average oil consumption of the engine;
the mileage-based corrected maintenance coefficient calculation unit is used for calculating a mileage-based corrected maintenance coefficient according to the product of an engine mileage basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the engine average oil consumption maintenance correction coefficient;
the corrected maintenance coefficient calculation unit is used for calculating a corrected maintenance coefficient based on the vehicle running time according to the product of a vehicle running time basic coefficient, the engine oil level maintenance correction coefficient, the engine oil temperature maintenance correction coefficient and the average oil consumption maintenance correction coefficient of the engine;
and a total maintenance coefficient determination unit for taking the maximum value of the engine use date and time maintenance coefficient, the oil level maintenance coefficient, the mileage-based corrected maintenance coefficient and the vehicle operation time-based corrected maintenance coefficient, and defining the maximum value as the total maintenance coefficient.
6. The engine oil servicing control system of claim 5, wherein the oil servicing parameter obtaining module comprises:
the engine oil liquid level acquisition unit is used for acquiring the engine oil liquid level according to the liquid level voltage signal of the engine oil liquid level temperature sensor after the engine control unit is electrified and before the engine is started or after the set time from the stop moment of the engine;
the engine oil temperature acquisition unit is used for acquiring the engine oil temperature according to the temperature voltage signal of the engine oil liquid level temperature sensor;
the engine running mileage acquisition unit is used for analyzing the information of the engine SAE J1939 message VDHR and acquiring the engine running mileage;
the engine running time acquisition unit is used for analyzing engine SAE J1939 message HOURS information and acquiring the engine running time;
the engine total oil consumption acquisition unit is used for analyzing engine SAE J1939 message LFC information to acquire the total oil consumption of the engine;
and the current date acquisition unit is used for analyzing the information of the engine SAE J1939 message TD and acquiring the current date.
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