CN113833547B - Engine oil liquid level determination method and device - Google Patents
Engine oil liquid level determination method and device Download PDFInfo
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- CN113833547B CN113833547B CN202010588287.XA CN202010588287A CN113833547B CN 113833547 B CN113833547 B CN 113833547B CN 202010588287 A CN202010588287 A CN 202010588287A CN 113833547 B CN113833547 B CN 113833547B
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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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- 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
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P11/00—Component parts, details, or accessories not provided for in, or of interest apart from, groups F01P1/00 - F01P9/00
- F01P11/14—Indicating devices; Other safety devices
Abstract
The invention discloses a method and a device for determining the oil level of engine oil, wherein the method comprises the following steps: after a vehicle is powered on, reading the engine oil level measured by an electronic oil level gauge to obtain an initial engine oil level, obtaining the water temperature of an engine of the vehicle, obtaining the stop time of the engine before the vehicle is powered on, correcting the initial engine oil level according to the water temperature of the engine to obtain a corrected engine oil level, determining whether the corrected engine oil level is effective or not according to the stop time of the engine, and outputting the corrected engine oil level as the engine oil level if the corrected engine oil level is effective; according to the method and the device, the engine oil liquid level is corrected according to the water temperature of the engine, the corrected engine oil liquid level is determined to be effective according to the stop time of the engine, and then the effective corrected engine oil liquid level is output, so that the influence of the environment temperature on the engine oil liquid level is considered, the accuracy of the engine oil liquid level is improved on the basis of ensuring the effectiveness of the engine oil liquid level, and the problem that the acquired engine oil liquid level is inaccurate due to the fact that the influence of other factors on the engine oil liquid level is not considered is solved.
Description
Technical Field
The invention relates to the technical field of vehicle engine control, in particular to a method and a device for determining an engine oil liquid level.
Background
When the engine stops, the oil pump stops working, and the engine oil flows back to the engine oil pan. When the engine is running, the oil must be kept above a certain level to prevent damage to engine components, so the oil level in the engine oil pan needs to be measured regularly to add oil in time according to the oil level condition, thereby ensuring that the engine can work normally.
In the existing method, in order to conveniently acquire the oil level in time, an oil level of an engine is monitored in real time by using an electronic dipstick. The method for measuring the oil level through the electronic oil dipstick generally comprises the following steps: when the vehicle starts, the engine oil liquid level is measured through the electronic oil level gauge, whether the engine oil liquid level is effective or not is judged according to the parking time, and whether engine oil needs to be added or not is determined according to the effective engine oil liquid level. In actual circumstances, however, the oil level may also be affected by other factors. The effect of just the considered parking time on the oil level may result in an inaccurate oil level being obtained.
Disclosure of Invention
The invention provides a method and a device for determining an engine oil level, which aim to solve the problem that the acquired engine oil level is inaccurate due to the fact that influence of other factors on the engine oil level is not considered in the prior art.
An engine oil level determination method includes:
after the vehicle is electrified, reading the oil level measured by the electronic oil level gauge to obtain an initial oil level;
acquiring the water temperature of an engine of the vehicle, and acquiring the shutdown time of the engine before the vehicle is powered on;
correcting the initial engine oil liquid level according to the engine water temperature to obtain a corrected engine oil liquid level;
determining whether the corrected oil level is effective or not according to the stop time of the engine;
and if the corrected engine oil level is effective, outputting the corrected engine oil level as the engine oil level.
Further, the correcting the initial engine oil liquid level according to the engine water temperature to obtain a corrected engine oil liquid level includes:
acquiring the whole vehicle attitude angle of the vehicle;
correcting the initial engine oil liquid level according to the whole vehicle attitude angle to obtain a horizontal engine oil liquid level;
and correcting the horizontal engine oil liquid level according to the temperature of the engine water to obtain the corrected engine oil liquid level.
Further, according to the whole car posture angle is right initial machine oil liquid level revises, obtains horizontal machine oil liquid level, includes:
acquiring angle correction data of the vehicle, wherein the angle correction data are engine oil level data measured by an electronic oil level gauge of the vehicle at different vehicle attitude angles and actual engine oil level data;
and inquiring the angle correction data according to the whole vehicle attitude angle and the initial engine oil liquid level to obtain the horizontal engine oil liquid level.
Further, the correcting the horizontal oil level according to the engine water temperature to obtain the corrected oil level includes:
acquiring water temperature correction data of the vehicle, wherein the water temperature correction data are engine oil level data and actual engine oil level data measured by an electronic engine dipstick at different engine water temperatures when the vehicle is stopped horizontally;
and inquiring the water temperature correction data according to the water temperature of the engine and the level engine oil liquid level so as to obtain the corrected engine oil liquid level.
Further, said determining whether said modified oil level is valid based on said engine off duration comprises:
acquiring the real-time speed of the vehicle;
and determining whether the corrected engine oil liquid level is effective or not according to the real-time vehicle speed and the stop time of the engine.
Further, the determining whether the corrected oil level is valid according to the real-time vehicle speed and the engine stop time period includes:
determining whether the real-time vehicle speed is within a preset vehicle speed range;
if the real-time vehicle speed is not the vehicle speed within the preset vehicle speed range, determining that the corrected engine oil liquid level is invalid;
if the real-time vehicle speed is within the preset vehicle speed range, determining whether the engine stopping time is shorter than a preset time, wherein the preset time is engine oil return time required for all engine oil to flow back to an engine oil pan;
if the stop time of the engine is not less than the preset time, determining that the corrected engine oil liquid level is effective;
and if the engine stopping time length is less than the preset time length, determining that the corrected engine oil liquid level is invalid.
Further, the preset duration is determined as follows:
determining the engine oil return time corresponding to the engine water temperature according to preset time query data, wherein the preset time query data are the engine oil return time at different engine water temperatures;
and taking the corresponding engine oil return time as the preset time.
Further, after determining whether the modified oil level is valid based on the engine off time period, the method further comprises:
and if the corrected engine oil level is invalid, outputting the last engine oil level stored by the vehicle as the engine oil level.
Further, before the reading the oil level measured by the electronic dipstick to obtain the initial oil level, the method further comprises:
determining whether the electronic dipstick has failed;
if the electronic oil dipstick has a fault, performing fault alarm on the electronic oil dipstick;
if the electronic engine oil level gauge does not have a fault, determining whether a water temperature sensor of the engine has a fault;
and if the water temperature sensor of the engine fails, performing fault alarm of the water temperature sensor.
An engine oil level determining apparatus comprising:
the reading module is used for reading the oil level measured by the electronic oil level gauge to obtain an initial oil level after the vehicle is powered on;
the acquisition module is used for acquiring the water temperature of the engine of the vehicle and acquiring the shutdown time of the engine before the vehicle is powered on;
the correction module is used for correcting the initial engine oil liquid level according to the temperature of the engine water to obtain a corrected engine oil liquid level;
the determining module is used for determining whether the corrected engine oil level is effective or not according to the stop time of the engine;
and the output module is used for outputting the corrected engine oil liquid level as the engine oil liquid level if the corrected engine oil liquid level is effective.
An engine oil level determining device comprises a memory, a processor and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of the engine oil level determining method.
A readable storage medium, in which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned oil level determination method.
In one scheme provided by the method and the device for determining the oil level, after a vehicle is powered on, the oil level measured by an electronic oil level gauge is read to obtain an initial oil level, the water temperature of an engine of the vehicle is obtained, the stop time of the engine before the vehicle is powered on is obtained, the initial oil level is corrected according to the water temperature of the engine to obtain a corrected oil level, whether the corrected oil level is effective or not is determined according to the stop time of the engine, and if the corrected oil level is effective, the corrected oil level is output as the oil level; according to the method and the device, the engine oil liquid level is corrected according to the water temperature of the engine, the corrected engine oil liquid level is determined to be effective according to the stop time of the engine, and then the effective corrected engine oil liquid level is output, so that the influence of the environment temperature on the engine oil liquid level is considered, the accuracy of the engine oil liquid level is improved on the basis of ensuring the effectiveness of the engine oil liquid level, and the problem that the acquired engine oil liquid level is inaccurate due to the fact that the influence of other factors on the engine oil liquid level is not considered is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic flow diagram of a method for determining oil level in accordance with an embodiment of the present invention;
FIG. 2 is a flowchart illustrating an implementation of step S30 according to an embodiment of the present invention;
FIG. 3 is a flowchart illustrating an implementation of step S42 according to an embodiment of the present invention;
FIG. 4 is another schematic flow chart diagram of a method for determining oil level in accordance with an embodiment of the present invention;
FIG. 5 is a schematic view of a configuration of an oil level determining device in accordance with an embodiment of the present invention;
FIG. 6 is another schematic illustration of an oil level determining device in accordance with an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
The engine oil level determining method provided by the embodiment of the invention can be applied to an engine oil level determining system, wherein the engine oil level determining system comprises an electronic oil level gauge, an engine and an engine oil level determining device, and the electronic oil level gauge, the engine and the engine oil level determining device are communicated through a bus. After the vehicle is electrified, the engine oil liquid level determining device reads the engine oil liquid level measured by the electronic oil level gauge to obtain an initial engine oil liquid level, obtains the engine water temperature of the vehicle, obtains the engine shutdown time before the vehicle is electrified, corrects the initial engine oil liquid level according to the engine water temperature to obtain a corrected engine oil liquid level, further determines whether the corrected engine oil liquid level is effective or not according to the engine shutdown time, outputs the corrected engine oil liquid level as the engine oil liquid level if the corrected engine oil liquid level is effective, considers the influence of the environment temperature on the engine oil liquid level, and improves the accuracy of the engine oil liquid level.
In this embodiment, the oil level determining system includes the electronic oil level, the engine, and the oil level determining device, which are only exemplary illustrations, and in other embodiments, the oil level determining system further includes other devices, which are not described herein again.
In one embodiment, as shown in fig. 1, an oil level determination method is provided, which is described by taking an oil level determination device applied in an oil level determination system as an example, and includes the following steps:
s10: after the vehicle is powered on, the oil level measured by the electronic dipstick is read to obtain an initial oil level.
After the whole vehicle is electrified, the engine oil level measured by an electronic engine oil gauge in the vehicle is read and recorded as the initial engine oil level, so that the initial engine oil level can be corrected according to the temperature of the engine water.
S20: the method comprises the steps of obtaining the water temperature of an engine of a vehicle, and obtaining the shutdown time of the engine before the vehicle is electrified.
In a real environment, the level of electronic oil is affected by other factors as well. For example, the oil level in the oil pan is greatly affected by the temperature, and the oil density is different due to the difference of the environmental temperature, so that the volume of the oil with the same weight is different, and the oil level in the oil pan is different. For example, if a user adds oil to the oil level scale in winter, and the process of oil consumption is not considered, the oil temperature increases and the oil density decreases as the ambient temperature increases, and the oil in the oil pan exceeds the upper limit of the oil level scale of the electronic engine, which may cause misjudgment of the result. If do not consider the influence of ambient temperature to the machine oil liquid level, but directly export the machine oil liquid level that the electron dipstick was measured for the user, can lead to the machine oil liquid level that the user obtained not accurate enough, and then probably lead to user's judgement error.
Before the vehicle runs, the water temperature of the engine is related to the external environment temperature, and the water temperature of the engine can influence the liquid level of engine oil. After reading the engine oil level measured by the electronic oil level gauge to obtain an initial engine oil level, the engine water temperature of a vehicle engine is required to be obtained, the engine shutdown time before the vehicle is powered on is obtained, the initial engine oil level is corrected according to the engine water temperature, and whether the corrected engine oil level is effective or not is determined according to the engine shutdown time, so that the accuracy of the output engine oil level is improved.
The engine water temperature can be determined through an engine water temperature sensor, and the engine stop time can be determined through calculating the interval between the whole vehicle power-on time of the vehicle and the whole vehicle power-on time of the last time.
In this embodiment, the determination of the engine water temperature by the engine water temperature sensor and the determination of the engine shutdown time by calculating the interval between the whole vehicle power-on time of the vehicle and the whole vehicle power-on time last time are only exemplary illustrations, in other embodiments, the engine water temperature may be determined in other manners, and the engine shutdown time may also be determined in other manners, which are not described herein again.
S30: and correcting the initial engine oil liquid level according to the temperature of the engine water to obtain a corrected engine oil liquid level.
After the engine water temperature is obtained, the initial engine oil liquid level is corrected according to the engine water temperature, and a corrected engine oil liquid level is obtained, so that the condition that the obtained engine oil liquid level is inaccurate due to the fact that the influence of the engine water temperature on the engine oil liquid level is considered is reduced.
S40: and determining whether the corrected oil level is effective according to the stop time of the engine.
After obtaining the corrected oil level, determining whether the corrected oil level is valid based on an engine-off duration to determine whether to output the oil level based on the determination.
Considering that a certain time is required for the engine oil pumped by the oil pump to flow back to the engine oil pan after the engine stops running, the length of the stop time of the engine determines whether the engine oil completely flows back to the engine oil pan, if the stop time of the engine is short, part of the engine oil in the engine may not flow back to the engine oil pan, and at the moment, the initial engine oil level measured by the electronic oil level gauge is inaccurate, so that the corrected engine oil level is inaccurate, and the corrected engine oil level is invalid at the moment.
And after determining whether the corrected oil level is effective or not according to the stop time of the engine, if the corrected oil level is ineffective, outputting the last oil level stored by the vehicle as the oil level. If the corrected engine oil level is invalid, the engine stop time is short, the vehicle does not run or the running time is short, no consumed engine oil amount exists, or the consumed engine oil amount is very little, and the engine oil level in the vehicle engine is not influenced.
S50: if the corrected engine oil level is effective, the corrected engine oil level is output as the engine oil level.
After whether the corrected oil level is effective or not is determined according to the stop time of the engine, if the corrected oil level is effective, the stop time of the engine is longer, all the engine oil in the engine flows back into an oil pan of the engine, at the moment, the corrected oil level is effective, the corrected oil level is used as the oil level and is output to an instrument panel or other display equipment, so that a user can know the condition of the engine oil in the engine, and further, whether the engine oil needs to be added or not is judged according to the oil level, and the normal and safe operation of a vehicle is guaranteed.
In the embodiment, after a vehicle is powered on, the engine oil level measured by an electronic oil level gauge is read to obtain an initial engine oil level, the engine water temperature of the vehicle is obtained, the stop time of the engine before the vehicle is powered on is obtained, the initial engine oil level is corrected according to the engine water temperature to obtain a corrected engine oil level, whether the corrected engine oil level is effective or not is determined according to the stop time of the engine, and if the corrected engine oil level is effective, the corrected engine oil level is output as the engine oil level; the engine oil liquid level is corrected according to the temperature of the engine water, the corrected engine oil liquid level is determined to be effective according to the stop time of the engine, then the corrected engine oil liquid level is effectively output, the influence of the environment temperature on the engine oil liquid level is considered, the accuracy of the engine oil liquid level is improved on the basis of ensuring the validity of the engine oil liquid level, and the problem that the acquired engine oil liquid level is inaccurate due to the fact that the influence of other factors on the engine oil liquid level is not considered is solved.
In an embodiment, as shown in fig. 2, in step S30, the initial oil level is corrected according to the temperature of the engine water, so as to obtain a corrected oil level, which specifically includes the following steps:
s31: and acquiring the whole vehicle attitude angle of the vehicle.
The whole vehicle attitude angle can also influence the engine oil liquid level, and under different whole vehicle attitude angles, the engine oil liquid level detected by the electronic engine oil dipstick is different from the engine oil liquid level detected by the state under the level. If the influence of the posture of the whole vehicle on the engine oil liquid level is not considered, if a user stops the vehicle on a slope for a long time, the engine oil liquid level collected by the electronic engine dipstick is inaccurate when the vehicle is restarted, and the engine oil liquid level is output wrongly. Therefore, after the engine oil liquid level measured by the electronic oil level gauge is read to obtain the initial engine oil liquid level, the whole vehicle attitude angle of the vehicle is required to be obtained so as to correct the initial engine oil liquid level according to the current whole vehicle attitude angle, and the interference of the whole vehicle attitude angle to the engine oil liquid level is reduced.
S32: and correcting the initial engine oil liquid level according to the attitude angle of the whole vehicle to obtain the horizontal engine oil liquid level.
After the whole vehicle attitude angle of the vehicle is obtained, the initial engine oil liquid level is corrected according to the whole vehicle attitude angle, the horizontal engine oil liquid level of the vehicle at the horizontal attitude angle is obtained, the interference of the whole vehicle attitude angle on the engine oil liquid level is reduced, and the accuracy of the obtained engine oil liquid level is improved.
S33: and correcting the horizontal engine oil liquid level according to the temperature of the engine water to obtain a corrected engine oil liquid level.
After the initial engine oil liquid level is corrected according to the posture angle of the whole vehicle to obtain the horizontal engine oil liquid level, the horizontal engine oil liquid level is corrected according to the temperature of the engine water to obtain the corrected engine oil liquid level. Meanwhile, the influence of the attitude angle of the whole vehicle and the water temperature of the engine on the engine oil liquid level is considered, standard engine oil liquid level information under normal temperature and the horizontal attitude of the whole vehicle is obtained, and the accuracy of the output engine oil liquid level is further improved.
For example, because the engine oil level data detected by the electronic engine oil level gauge is influenced by the posture of the whole vehicle and the ambient temperature (or the engine oil temperature), the engine oil level at 20 ℃ is taken as a reference, the engine oil density at different temperatures is different, the engine oil level is different from the engine oil level at 20 ℃, and under different postures of the whole vehicle, the engine oil level detected by the electronic engine oil level gauge is different from the horizontal state, the initial engine oil level recognized by the electronic engine oil level gauge is corrected according to the posture of the whole vehicle and the engine temperature, the engine oil level corresponding to the horizontal state at 20 ℃ is corrected to the initial engine oil level, and the engine oil level corresponding to the vehicle horizontal state at 20 ℃ is output to a user as the engine oil level.
In the embodiment, the whole vehicle attitude angle of the vehicle is obtained, the initial engine oil liquid level is corrected according to the whole vehicle attitude angle to obtain the horizontal engine oil liquid level, the horizontal engine oil liquid level is corrected according to the engine water temperature to obtain the corrected engine oil liquid level, the step of correcting the initial engine oil liquid level according to the engine water temperature to obtain the corrected engine oil liquid level is refined, the influence of the whole vehicle attitude angle and the engine water temperature on the engine oil liquid level is considered at the same time, the accuracy of the output engine oil liquid level is further improved, and therefore the risk of misjudgment of a user is reduced.
In an embodiment, in step S31, the initial oil level is corrected according to the vehicle attitude angle to obtain a horizontal oil level, and the method specifically includes the following steps:
s311: and acquiring angle correction data of the vehicle, wherein the angle correction data are engine oil level data measured by an electronic oil level gauge of the vehicle at different vehicle attitude angles and actual engine oil level data.
After the whole vehicle attitude angle of the vehicle is obtained, angle correction data of the vehicle are obtained, wherein the angle correction data of the vehicle are engine oil liquid level data measured by an electronic engine oil rule of the vehicle under different whole vehicle attitude angles and actual engine oil liquid level data.
In one embodiment, the angle correction data of the vehicle is acquired by: the method comprises the steps of carrying out a whole vehicle attitude angle test on a vehicle in advance, acquiring all electronic oil level gauge measurement engine oil level data under different whole vehicle attitude angles when the test vehicle is statically parked, and acquiring actual engine oil level data corresponding to the engine oil level data measured by different electronic oil level gauges under different whole vehicle attitude angles, thereby determining the influence of different whole vehicle attitude angles on the engine oil level.
S312: and inquiring angle correction data according to the attitude angle of the whole vehicle and the initial engine oil liquid level to obtain the horizontal engine oil liquid level.
After acquiring the finished automobile attitude angle, the initial engine oil liquid level and the angle correction data of the automobile, inquiring the angle correction data according to the finished automobile attitude angle and the initial engine oil liquid level to determine the actual engine oil liquid level data corresponding to the initial engine oil liquid level under the current finished automobile attitude angle, and taking the corresponding actual engine oil liquid level data as the horizontal engine oil liquid level, determining the horizontal engine oil liquid level according to the actual test result, improving the accuracy of the horizontal engine oil liquid level and further improving the accuracy of the output engine oil liquid level.
For example, the angle correction data is made into a map, after the finished automobile attitude angle and the initial engine oil liquid level of the vehicle are obtained, the map of the angle correction data is inquired according to the finished automobile attitude angle and the initial engine oil liquid level, corresponding actual engine oil liquid level data is obtained to serve as the horizontal engine oil liquid level, the method and the device are convenient and fast to use, the calculated amount is small, the speed of obtaining the horizontal engine oil liquid level is improved, and further the engine oil liquid level output speed is improved.
In this embodiment, the acquisition of the horizontal oil level by the map of the angle correction data according to the vehicle attitude angle and the initial oil level is only an exemplary description, and in other embodiments, the angle correction data may be also inquired in other ways to acquire the horizontal oil level, which is not described herein again.
In this embodiment, angle correction data through acquireing the vehicle, angle correction data measures machine oil liquid level data and actual machine oil liquid level data for the electron machine oil rule of vehicle under the different whole car attitude angles, according to whole car attitude angle and initial machine oil liquid level inquiry angle correction data, in order to obtain horizontal machine oil liquid level, the step of obtaining horizontal machine oil liquid level has been refined, confirm horizontal machine oil liquid level according to the experimental result of reality, the accuracy of horizontal machine oil liquid level has been improved, and then the accuracy of the machine oil liquid level of output has been improved, furthermore, obtain horizontal machine oil liquid level through inquiry angle correction data, and is convenient and fast, the speed of obtaining horizontal machine oil liquid level has been improved, and then the input speed of machine oil liquid level has been improved.
In an embodiment, in step S32, the horizontal oil level is corrected according to the temperature of the engine water to obtain a corrected oil level, which includes the following steps:
s321: and acquiring water temperature correction data of the vehicle, wherein the water temperature correction data are engine oil level data and actual engine oil level data measured by an electronic engine dipstick at different engine water temperatures when the vehicle is horizontally stopped.
And after the horizontal engine oil level is obtained, water temperature correction data of the vehicle are obtained, wherein the water temperature correction data of the vehicle are engine oil level data and actual engine oil level data measured by an electronic engine oil ruler at different engine water temperatures when the vehicle is horizontally parked.
In one embodiment, the water temperature correction data of the vehicle is acquired by: the method comprises the steps of carrying out an engine water temperature test on a vehicle in advance, obtaining all electronic oil level data measured by oil dipsticks under different engine water temperatures when the test vehicle is horizontally and statically parked, obtaining actual oil level data corresponding to the oil level data measured by the different electronic oil dipsticks under different engine water temperatures, and determining the influence of the different engine water temperatures on the oil level.
S321: and inquiring water temperature correction data according to the water temperature of the engine and the level engine oil liquid level to obtain the corrected engine oil liquid level.
After the engine water temperature, the horizontal engine oil liquid level and the water temperature correction data are obtained, the temperature correction data are inquired according to the current engine water temperature and the horizontal engine oil liquid level so as to determine the actual engine oil liquid level data corresponding to the horizontal engine oil liquid level under the current engine water temperature, the corresponding actual engine oil liquid level data are used as the corrected engine oil liquid level, the corrected engine oil liquid level is determined according to the actual test result, the accuracy of the corrected engine oil liquid level is improved, and the accuracy of the output engine oil liquid level is further improved.
For example, the temperature correction data is made into a map, after the vehicle attitude angle and the initial engine oil liquid level of the vehicle are obtained, the map of the temperature correction data is inquired according to the engine water temperature and the horizontal engine oil liquid level, and the corresponding actual engine oil liquid level data is obtained to serve as the corrected engine oil liquid level, so that the engine oil liquid level output speed is further increased.
In this embodiment, the step of querying the map of the temperature correction data according to the engine water temperature and the horizontal engine oil liquid level to obtain the corrected engine oil liquid level is only an exemplary description, and in other embodiments, the angle correction data may also be queried in other manners to obtain the corrected engine oil liquid level, which is not described herein again.
In the embodiment, through acquiring water temperature correction data of the vehicle, when the water temperature correction data is a vehicle horizontal parking, the electronic engine dipstick at different engine water temperatures measures the engine oil liquid level data and actual engine oil liquid level data, the water temperature correction data is inquired according to the engine water temperature and the horizontal engine oil liquid level to obtain the corrected engine oil liquid level, the step of obtaining the corrected engine oil liquid level is refined, the corrected engine oil liquid level is determined according to an actual test result, the accuracy of the corrected engine oil liquid level is improved, and further the accuracy of the output engine oil liquid level is improved.
In one embodiment, the step S40 of determining whether the modified oil level is effective according to the engine stop duration specifically includes the following steps:
s41: and acquiring the real-time speed of the vehicle.
Because the engine oil liquid level is influenced in the moving process of the vehicle, in order to ensure the accuracy of the engine oil liquid level, the moving state of the vehicle needs to be confirmed, after the corrected engine oil liquid level and the engine stop time length are obtained, the real-time vehicle speed of the vehicle needs to be obtained, whether the corrected engine oil liquid level is effective is determined according to the real-time vehicle speed and the engine stop time length, and the real effectiveness of the corrected engine oil liquid level is improved.
S42: and determining whether the corrected engine oil liquid level is effective or not according to the real-time vehicle speed and the stop time of the engine.
After the real-time speed of the vehicle is obtained, whether the corrected engine oil liquid level is effective or not is determined according to the real-time speed and the stop time of the engine, so that the influence of the motion state of the vehicle and the stop time of the engine on the engine oil liquid level is avoided, and the real effectiveness of the corrected engine oil liquid level is further improved.
In the embodiment, the real-time vehicle speed of the vehicle is obtained, whether the corrected engine oil liquid level is effective or not is determined according to the real-time vehicle speed and the stop time of the engine, the step of determining whether the corrected engine oil liquid level is effective or not according to the stop time of the engine is refined, the vehicle speed factor is increased, the influence of the vehicle speed on the engine oil liquid level is considered, the real effectiveness of the corrected engine oil liquid level is further improved, and therefore the engine oil liquid level obtained by a user is more accurate and effective.
In one embodiment, as shown in fig. 3, the step S42 of determining whether the corrected oil level is effective according to the real-time vehicle speed and the engine stop time includes the following steps:
s421: and determining whether the real-time vehicle speed is within a preset vehicle speed range.
After the real-time vehicle speed of the vehicle is obtained, the obtained real-time vehicle speed is judged, and whether the real-time vehicle speed is within a preset vehicle speed range or not is determined so as to determine whether the vehicle is in motion or not.
For example, the vehicle speed in the preset vehicle speed range is 0, that is, the motion state of the vehicle is determined by determining whether the vehicle speed is 0.
In this embodiment, the vehicle speed in the preset vehicle speed range is 0, which is only an exemplary description, and in other embodiments, the vehicle speed in the preset vehicle speed range may also be another vehicle speed that ensures that the vehicle is not in motion, and details are not described here.
S422: and if the real-time vehicle speed is not the vehicle speed within the preset vehicle speed range, determining that the corrected engine oil liquid level is invalid.
For example, after determining whether the real-time vehicle speed is 0, if the real-time vehicle speed is not 0, it indicates that the vehicle is moving, and the vehicle is not in a stationary state at this time, it is determined that the correction oil level is invalid, and the correction oil level may not be output to the instrument panel, and in order to enable the user to obtain the oil level, the last oil level may be output to the user.
S423: and if the real-time vehicle speed is within the preset vehicle speed range, determining whether the stop time of the engine is less than the preset time, wherein the preset time is the oil return time required for all engine oil to flow back to the oil pan of the engine.
For example, after determining whether the real-time vehicle speed is 0, if the real-time vehicle speed is 0, it indicates that the vehicle is not moving, and the vehicle is in a stationary state at this time, it needs to be further determined whether the engine stop time period is less than a preset time period, so as to further determine whether the engine oil completely flows back to the engine oil pan, and further determine whether the corrected engine oil level is effective. The preset time is the oil return time required for all engine oil to flow back to the engine oil pan.
S424: and if the stop time of the engine is not less than the preset time, determining that the corrected engine oil liquid level is effective.
After whether the stop time of the engine is smaller than the preset time or not is determined, if the stop time of the engine is not smaller than the preset time, the stop time of the engine is longer, the stop time of the engine meets the time required for all engine oil in the engine to flow back into an oil pan of the engine, the corrected oil level is effective at the moment, the corrected oil level is used as the oil level and is output to an instrument panel or other display equipment, so that a user can know the condition that the engine oil in the engine is known, and whether the engine oil needs to be added or not is judged according to the oil level, and the normal and safe operation of a vehicle is ensured.
S425: and if the engine stopping time length is less than the preset time length, determining that the corrected engine oil liquid level is invalid.
After whether the stop time of the engine is less than the preset time or not is determined, if the stop time of the engine is less than the preset time, the stop time of the engine is short, part of engine oil in the engine possibly does not flow back to an oil pan of the engine, the initial engine oil liquid level measured by an electronic oil rule is inaccurate at the moment, the corrected engine oil liquid level is inaccurate, and the corrected engine oil liquid level is invalid at the moment.
For example, the oil backflow condition is also influenced by other factors, the condition that the oil backflow to an engine oil pan is incomplete is not avoided, the preset time period is set to be a fixed time period t, the engine oil can completely flow back to the engine oil pan under all conditions within the fixed time period t, if the engine stop time period is less than t, the engine stop time period is short, part of the engine oil in the engine may not flow back to the engine oil pan, the corrected oil level is invalid, if the engine stop time period is not less than t, the engine stop time period is long, the engine stop time period meets the time period required for all the engine oil in the engine to flow back to the engine oil pan, and at the moment, the corrected oil level is valid.
In the embodiment, whether the real-time vehicle speed is within the preset vehicle speed range is determined, if the real-time vehicle speed is not within the preset vehicle speed range, the correction engine oil liquid level is determined to be invalid, if the real-time vehicle speed is within the preset vehicle speed range, whether the engine stop time is shorter than the preset time is determined, the preset time is the oil return time required for all the engine oil to flow back to the engine oil pan, if the engine stop time is shorter than the preset time, the correction engine oil liquid level is determined to be valid, and if the engine stop time is shorter than the preset time, the correction engine oil liquid level is determined to be invalid.
In an embodiment, the preset time period may also be set according to the temperature of the engine water, and the preset time period is specifically determined as follows:
s4231: and determining the engine oil return time corresponding to the engine water temperature according to the preset time query data, wherein the preset time query data are the engine oil return time at different engine water temperatures.
The preset time period may be determined according to the engine water temperature. At different temperatures, it is believed that the length of time required for oil to flow back to the engine sump varies. And correspondingly using different preset time lengths as judgment thresholds according to different engine water temperatures. When the temperature of the engine water (namely the temperature of the engine) is higher, the speed of the engine oil flowing back to the oil pan of the engine is higher, the required preset time threshold value is smaller, when the temperature of the engine water is lower, the speed of the engine oil flowing back to the oil pan of the engine is lower, the required preset time threshold value is larger,
the method comprises the steps of presetting an engine test, recording an actual test result, and obtaining the oil return time of engine oil flowing back to an oil pan of the engine at different temperatures so as to obtain preset time query data. The oil return time length needs to meet the time length that the maximum volume of engine oil completely flows back to the engine oil pan.
After the water temperature of the engine is obtained, the engine oil return time corresponding to the water temperature of the engine is determined according to the preset time query data.
S4232: and taking the corresponding engine oil return time as preset time.
After the engine oil return time corresponding to the engine water temperature is determined according to the preset time query data, the engine oil return time corresponding to the engine water temperature is used as the preset time, so that the accuracy of the preset time is improved, the possibility of judgment errors caused by setting a fixed and large preset time is reduced, and the accuracy of correcting the engine oil liquid level is improved.
For example, the preset duration query data is made to be map, after the water temperature of the engine is obtained, the map of the preset duration query data is queried according to the water temperature of the engine, so that the engine oil return duration corresponding to the water temperature of the engine is obtained and serves as the current preset duration.
In this embodiment, the map of the query data of the preset duration is queried according to the water temperature of the engine, and it is only an exemplary description that the engine oil return duration corresponding to the water temperature of the engine is obtained.
In this embodiment, it is long when the engine oil return that engine water temperature corresponds is confirmed through long inquiry data according to predetermineeing, it is long when the long inquiry data of predetermineeing is the engine oil return under the different engine water temperatures, it is long as predetermineeing to regard as when presetting the machine oil return that corresponds, the influence that the temperature was long when the machine oil return is further considered, the accuracy of length when predetermineeing has been improved, because of setting up fixed, great the produced judgement error's possibility of length when predetermineeing, and then the accuracy of revising the machine oil liquid level has been improved.
In an embodiment, as shown in fig. 4, before step S10, namely before reading the oil level measured by the electronic machine dipstick to obtain the initial oil level, the method further includes the following steps:
s11: and determining whether the electronic oil dipstick has a fault.
In order to avoid the situation that the initial engine oil level obtained is inaccurate due to the fact that the electronic engine oil level gauge breaks down, whether the electronic engine oil level gauge breaks down needs to be determined before the engine oil level measured by the electronic engine oil level gauge is read to obtain the initial engine oil level, and then whether the engine oil level measured by the electronic engine oil level gauge is read to serve as the initial engine oil level is determined according to the judgment situation.
S12: and if the electronic oil level gauge has a fault, performing fault alarm on the electronic oil level gauge.
After whether the electronic oil level gauge breaks down or not is determined, if the electronic oil level gauge breaks down, the fault alarm of the electronic oil level gauge is carried out, so that a user can know the fault condition of the electronic oil level gauge and stop reading the oil level measured by the electronic oil level gauge.
S13: and if the oil level gauge of the electronic engine does not have a fault, determining whether a water temperature sensor of the engine has a fault.
In order to avoid the error of the water temperature of the engine read due to the fault of the water temperature sensor of the engine and further cause the error of the oil level of the correction machine, whether the water temperature sensor of the engine has the fault needs to be determined. After determining whether the electronic dipstick is malfunctioning, it is also necessary to determine whether a water temperature sensor of the engine is malfunctioning.
S14: and if the water temperature sensor of the engine fails, performing fault alarm of the water temperature sensor.
After determining whether the water temperature sensor of the engine has a fault, if the water temperature sensor of the engine has a fault, performing fault alarm of the water temperature sensor so that a user can know the fault condition of the water temperature sensor and stop reading the temperature of the water temperature sensor of the engine.
After determining whether the water temperature sensor of the engine breaks down or not, if the water temperature sensor of the engine does not break down, reading the oil level measured by the electronic oil dipstick to obtain an initial oil level, and acquiring the water temperature of the engine so as to correct the initial oil level according to the water temperature of the engine.
In the embodiment, before the engine oil level measured by the electronic oil level gauge is read to obtain the initial engine oil level, whether the electronic oil level gauge breaks down is determined, if the electronic oil level gauge breaks down, a fault alarm of the electronic oil level gauge is performed, if the electronic oil level gauge does not break down, whether the water temperature sensor of the engine breaks down is determined, if the water temperature sensor of the engine breaks down, a fault alarm of the water temperature sensor is performed, the condition that the initial engine oil level obtained due to the fact that the electronic oil level gauge breaks down is inaccurate is avoided, the condition that the engine water temperature read due to the fact that the water temperature sensor of the engine breaks down is avoided, the possibility that a user obtains the wrong engine oil level is further reduced, the accuracy of the engine oil level is improved, and the misjudgment risk of the user is reduced.
It should be understood that, the sequence numbers of the steps in the foregoing embodiments do not imply an execution sequence, and the execution sequence of each process should be determined by functions and internal logic of the process, and should not limit the implementation process of the embodiments of the present invention in any way.
In one embodiment, an oil level determination device is provided, which corresponds to the oil level determination method in the above embodiments one to one. As shown in FIG. 5, the oil level determination device includes a reading module 501, an obtaining module 502, a correcting module 503, a determining module 504, and an output module 505. The functional modules are explained in detail as follows:
the reading module 501 is used for reading the oil level measured by the electronic oil level gauge after the vehicle is powered on to obtain an initial oil level;
an obtaining module 502, configured to obtain an engine water temperature of the vehicle, and obtain an engine shutdown duration before the vehicle is powered on;
the correction module 503 is configured to correct the initial engine oil liquid level according to the engine water temperature to obtain a corrected engine oil liquid level;
a determination module 504 configured to determine whether the modified oil level is valid based on the engine off duration;
and an output module 505, configured to output the corrected engine oil level as an engine oil level if the corrected engine oil level is valid.
Further, the modification module 503 is specifically configured to:
acquiring the whole vehicle attitude angle of the vehicle;
correcting the initial engine oil liquid level according to the whole vehicle attitude angle to obtain a horizontal engine oil liquid level;
and correcting the horizontal engine oil liquid level according to the temperature of the engine water to obtain the corrected engine oil liquid level.
Further, the modification module 503 is further specifically configured to:
acquiring angle correction data of the vehicle, wherein the angle correction data are engine oil level data measured by an electronic oil level gauge of the vehicle at different vehicle attitude angles and actual engine oil level data;
and inquiring the angle correction data according to the whole vehicle attitude angle and the initial engine oil liquid level to obtain the horizontal engine oil liquid level.
Further, the modification module 503 is further specifically configured to:
acquiring water temperature correction data of the vehicle, wherein the water temperature correction data are engine oil level data and actual engine oil level data measured by an electronic engine dipstick at different engine water temperatures when the vehicle is stopped horizontally;
and inquiring the water temperature correction data according to the water temperature of the engine and the level engine oil liquid level so as to obtain the corrected engine oil liquid level.
Further, the determining module 504 is specifically configured to:
acquiring the real-time speed of the vehicle;
and determining whether the corrected engine oil liquid level is effective or not according to the real-time vehicle speed and the stop time of the engine.
Further, the determining module 504 is further specifically configured to:
determining whether the real-time vehicle speed is within a preset vehicle speed range;
if the real-time vehicle speed is not the vehicle speed within the preset vehicle speed range, determining that the corrected engine oil liquid level is invalid;
if the real-time vehicle speed is within the preset vehicle speed range, determining whether the engine stopping time is shorter than a preset time, wherein the preset time is engine oil return time required for all engine oil to flow back to an engine oil pan;
if the engine stopping time is not less than the preset time, determining that the corrected engine oil liquid level is effective;
and if the engine stopping time length is less than the preset time length, determining that the corrected engine oil liquid level is invalid.
Further, the determining module 504 is further specifically configured to:
determining the engine oil return time corresponding to the engine water temperature according to preset time query data, wherein the preset time query data are the engine oil return time at different engine water temperatures;
and taking the corresponding engine oil return time as the preset time.
Further, the output module 505 is further specifically configured to:
and if the corrected engine oil level is invalid, outputting the last engine oil level stored by the vehicle as the engine oil level.
Further, the determining module 504 is further specifically configured to:
determining whether the electronic dipstick has failed;
if the electronic oil dipstick has a fault, performing fault alarm on the electronic oil dipstick;
if the electronic engine oil level gauge does not have a fault, determining whether a water temperature sensor of the engine has a fault;
and if the water temperature sensor of the engine fails, performing fault alarm of the water temperature sensor.
For specific definition of the oil level determination means, reference may be made to the above definition of the oil level determination method, which is not described in detail here. The various modules in the oil level determination device described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, as shown in FIG. 6, an oil level determining device is provided that includes a processor, a memory connected by a system bus. Wherein the processor of the oil level determination device is configured to provide calculation and control capabilities. The storage of the oil level determination device comprises a nonvolatile storage medium and an internal storage. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The computer program is executed by a processor to implement a method of determining an oil level.
In one embodiment, an engine oil level determining apparatus is provided, which includes a memory, a processor, and a computer program stored in the memory and capable of moving on the processor, wherein the processor executes the computer program to perform the following steps:
after the vehicle is electrified, reading the oil level measured by the electronic oil level gauge to obtain an initial oil level;
acquiring the water temperature of an engine of the vehicle, and acquiring the shutdown time of the engine before the vehicle is powered on;
correcting the initial engine oil liquid level according to the engine water temperature to obtain a corrected engine oil liquid level;
determining whether the corrected engine oil liquid level is effective or not according to the stop time of the engine;
and if the corrected engine oil level is effective, outputting the corrected engine oil level as the engine oil level.
In one embodiment, a readable storage medium is provided, having stored thereon a computer program which, when executed by a processor, performs the steps of:
after the vehicle is powered on, reading the oil level measured by the electronic oil level gauge to obtain an initial oil level;
acquiring the water temperature of an engine of the vehicle, and acquiring the shutdown time of the engine before the vehicle is powered on;
correcting the initial engine oil liquid level according to the engine water temperature to obtain a corrected engine oil liquid level;
determining whether the corrected oil level is effective or not according to the stop time of the engine;
and if the corrected engine oil level is effective, outputting the corrected engine oil level as the engine oil level.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by hardware instructions of a computer program, which can be stored in a non-volatile computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. Any reference to memory, storage, database, or other medium used in the embodiments provided herein may include non-volatile and/or volatile memory, among others. Non-volatile memory can include read-only memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous Link DRAM (SLDRAM), rambus (Rambus) direct RAM (RDRAM), direct Rambus Dynamic RAM (DRDRAM), and Rambus Dynamic RAM (RDRAM), among others.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (8)
1. A method for determining the level of oil is characterized by comprising the following steps:
after the vehicle is powered on, reading the oil level measured by the electronic oil level gauge to obtain an initial oil level;
acquiring the water temperature of an engine of the vehicle, and acquiring the shutdown time of the engine before the vehicle is powered on;
correcting the initial engine oil liquid level according to the engine water temperature to obtain a corrected engine oil liquid level;
determining whether the corrected engine oil liquid level is effective or not according to the stop time of the engine;
if the corrected engine oil level is effective, outputting the corrected engine oil level as an engine oil level;
determining whether the modified engine oil level is valid based on the engine off duration includes:
if the real-time vehicle speed is within a preset vehicle speed range, determining whether the shutdown time of the engine is shorter than a preset time, wherein the preset time is the oil return time required for all engine oil to flow back to an engine oil pan; if the engine stopping time is not less than the preset time, determining that the corrected engine oil liquid level is effective;
the preset duration is determined by the following method:
determining the engine oil return time corresponding to the engine water temperature according to preset time query data, wherein the preset time query data are the engine oil return time at different engine water temperatures;
and taking the corresponding engine oil return time as the preset time.
2. The oil level determination method of claim 1, wherein said modifying the initial oil level based on the engine water temperature to obtain a modified oil level comprises:
acquiring the whole vehicle attitude angle of the vehicle;
correcting the initial engine oil liquid level according to the attitude angle of the whole vehicle to obtain a horizontal engine oil liquid level;
and correcting the horizontal engine oil liquid level according to the temperature of the engine water to obtain the corrected engine oil liquid level.
3. The oil level determination method of claim 2, wherein said modifying said initial oil level according to said full vehicle attitude angle to obtain a horizontal oil level comprises:
acquiring angle correction data of the vehicle, wherein the angle correction data are engine oil level data measured by an electronic oil level gauge of the vehicle at different vehicle attitude angles and actual engine oil level data;
and inquiring the angle correction data according to the whole vehicle attitude angle and the initial engine oil liquid level to obtain the horizontal engine oil liquid level.
4. The oil level determination method of claim 2, wherein said modifying the level oil level based on the engine water temperature to obtain the modified oil level comprises:
acquiring water temperature correction data of the vehicle, wherein the water temperature correction data are engine oil level data and actual engine oil level data measured by an electronic engine oil dipstick at different engine water temperatures when the vehicle is horizontally stopped;
and inquiring the water temperature correction data according to the water temperature of the engine and the level engine oil liquid level so as to obtain the corrected engine oil liquid level.
5. The oil level determination method of claim 1, further comprising:
if the real-time vehicle speed is not the vehicle speed within the preset vehicle speed range, determining that the corrected engine oil liquid level is invalid;
and if the engine stopping time length is less than the preset time length, determining that the corrected engine oil liquid level is invalid.
6. The oil level determination method of any of claims 1-5, wherein after determining whether the modified oil level is valid based on the length of time the engine is shut down, the method further comprises:
and if the corrected engine oil level is invalid, outputting the last engine oil level stored by the vehicle as the engine oil level.
7. The oil level determination method of any one of claims 1-5, wherein prior to reading an oil level measured by an electronic dipstick to obtain an initial oil level, the method further comprises:
determining whether the electronic dipstick has failed;
if the electronic oil level gauge fails, performing fault alarm on the electronic oil level gauge;
if the electronic engine oil level gauge does not have a fault, determining whether a water temperature sensor of the engine has a fault;
and if the water temperature sensor of the engine fails, performing fault alarm of the water temperature sensor.
8. An engine oil level determining apparatus, comprising:
the reading module is used for reading the oil level measured by the electronic oil level gauge to obtain an initial oil level after the vehicle is powered on;
the acquisition module is used for acquiring the water temperature of an engine of the vehicle and acquiring the shutdown time of the engine before the vehicle is powered on;
the correction module is used for correcting the initial engine oil liquid level according to the temperature of the engine water to obtain a corrected engine oil liquid level;
the determining module is used for determining whether the corrected engine oil level is effective or not according to the stop time of the engine;
a determination module specifically configured to: if the real-time vehicle speed is within a preset vehicle speed range, determining whether the engine stop time is shorter than a preset time, wherein the preset time is engine oil return time required for all engine oil to flow back to an engine oil pan; if the stop time of the engine is not less than the preset time, determining that the corrected engine oil liquid level is effective;
the preset duration is determined by the following method:
determining the engine oil return time corresponding to the engine water temperature according to preset time query data, wherein the preset time query data are the engine oil return time at different engine water temperatures;
taking the corresponding engine oil return time length as the preset time length;
and the output module is used for outputting the corrected engine oil liquid level as the engine oil liquid level if the corrected engine oil liquid level is effective.
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| CN114961921B (en) * | 2022-06-13 | 2024-01-16 | 潍柴动力股份有限公司 | Oil pan oil mass calculation method and vehicle |
| CN115059527B (en) * | 2022-06-20 | 2023-10-27 | 中国第一汽车股份有限公司 | Engine oil liquid level determining method, device, equipment and storage medium |
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