A method, apparatus, and vehicle for measuring engine oil quantity

Abstract

The application discloses a kind of measuring method, device and vehicle of engine oil quantity.The method comprises: obtaining the initial liquid level value of engine oil measured by oil dipstick, and obtaining the state information of engine;Obtain engine state-liquid level compensation value relationship model;Wherein, the relationship between engine state information and liquid level compensation value is established in engine state-liquid level compensation value relationship model;Using engine state-liquid level compensation value relationship model, state information is processed, and liquid level compensation value is obtained;Using liquid level compensation value, initial liquid level value is corrected, and liquid level correction value is obtained;And after liquid level correction value exceeds preset range, output alarm information;Wherein, liquid level correction value represents actual oil quantity value.The application can improve the accuracy of oil level measurement result, monitor oil level in real time, and improve the safety and service life of engine.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a method and device for measuring engine oil quantity, and a vehicle. Background Art

[0002] Automobile engines experience irreversible mechanical wear during operation, requiring engine oil to lubricate, reduce friction, and maintain cooling. To ensure proper engine operation, the oil level must be maintained within a reasonable range. Insufficient oil levels can lead to insufficient lubrication between components, while excessive oil levels can cause overflow and increase power loss within the engine. Therefore, measuring and monitoring the engine oil level is crucial to ensure proper engine operation.

[0003] Traditional engine oil level measurement methods are mainly based on mechanical oil dipsticks, but they often have the following problems: Due to the backflow time of the oil, the oil level can usually only be accurately read after the engine has been shut down for more than 60 minutes. It is impossible to measure the oil level in a timely manner during engine operation, and thus, leakage problems encountered during engine operation cannot be identified in a timely manner, which can easily cause engine damage and shorten the engine life. Summary of the Invention

[0004] The present invention provides a method, device and vehicle for measuring the amount of engine oil, so as to improve the accuracy and timeliness of engine oil level measurement.

[0005] According to one aspect of the present invention, a method for measuring the amount of engine oil is provided, comprising:

[0006] Obtain the initial liquid level value of the engine oil measured by the oil dipstick, and obtain the status information of the engine;

[0007] Obtaining an engine state-liquid level compensation value relationship model; wherein the engine state-liquid level compensation value relationship model establishes a relationship between engine state information and the liquid level compensation value;

[0008] The engine state-liquid level compensation value relationship model is used to process the state information and obtain the liquid level compensation value;

[0009] The initial liquid level value is corrected using the liquid level compensation value to obtain a liquid level correction value; and an alarm message is output when the liquid level correction value exceeds a preset range; wherein the liquid level correction value represents the actual oil quantity value.

[0010] According to another aspect of the present invention, there is provided a device for measuring the amount of engine oil, comprising:

[0011] An information acquisition module is used to obtain the initial liquid level value of the engine oil measured by the oil dipstick and obtain the status information of the engine;

[0012] The compensation value obtaining module is configured to obtain an engine state-liquid level compensation value relationship model, wherein the engine state-liquid level compensation value relationship model establishes a relationship between engine state information and a liquid level compensation value; and the engine state-liquid level compensation value relationship model is used to process the state information to obtain the liquid level compensation value.

[0013] The correction module is configured to correct the initial liquid level value by using the liquid level compensation value to obtain a liquid level correction value; and output an alarm information when the liquid level correction value exceeds a preset range, wherein the liquid level correction value represents an actual oil amount value.

[0014] According to another aspect of the present application, a vehicle is provided, which comprises an engine controlled by the engine oil amount measurement method provided by any of the embodiments of the present application.

[0015] The embodiment of the present application measures the initial liquid level value of the engine oil by using the oil dipstick, and corrects the initial liquid level value by using the engine state-liquid level compensation value relationship model. The engine state-liquid level compensation value relationship model comprehensively considers the influence of the engine state on the oil level, and therefore, the use of the model to correct the initial liquid level value is beneficial to solving the problem of inaccurate oil level. Meanwhile, the engine oil amount is monitored in real time according to the preset strategy, so as to ensure that the oil level is within a safe range, and solve the problem of engine damage and influence on the service life of the engine caused by the untimely monitoring of the oil level. In summary, the embodiment of the present application can improve the accuracy of the measurement result of the oil level, monitor the oil level in real time, and improve the safety and service life of the engine.

[0016] It should be understood that the content described in this part is not intended to identify key or important features of the embodiments of the present application, nor is it used to limit the scope of the present application. Other features of the present application will become apparent through the following description. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 is a flowchart of an engine oil amount measurement method according to an embodiment of the present application;

[0019] Figure 2 is a flowchart of an engine state-liquid level compensation value relationship model establishment method according to an embodiment of the present application;

[0020] Figure 3 is a structural schematic diagram of an engine oil quantity measuring device according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0022] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0023] Figure 1 is a flowchart of an engine oil quantity measuring method according to an embodiment of the present application, and the present embodiment can be applicable to real-time monitoring of engine oil quantity. The method can be performed by an engine oil quantity measuring device, which can be realized in the form of hardware and / or software, and the device can be configured in the engine control system of a vehicle. Referring to Figure 1 , the method comprises the following steps:

[0024] S110, obtaining an initial liquid level value of engine oil measured by an oil dipstick, and obtaining state information of the engine.

[0025] Among them, the oil dipstick can be an electronic oil dipstick, a mechanical oil dipstick, etc.

[0026] Taking an electronic oil dipstick as an example, based on the principle of ultrasonic liquid level sensor, an ultrasonic pulse is emitted by an electronic analysis device in the oil dipstick, reflected at the interface between oil and air and received, the distance of sound wave return determines the echo delay, and the electronic analysis device calculates the oil level according to the echo delay. Illustratively, the ultrasonic oil level sensor installed on the engine oil pan obtains the oil quantity information and displays the measurement data on the electronic oil dipstick.

[0027] The engine state information refers to relevant parameters capable of describing the engine state. Exemplarily, the engine state information of the engine includes: engine speed, oil temperature, engine downtime, engine tilt angle, and vehicle information.

[0028] S120, an engine state-liquid level compensation value relationship model is acquired; wherein the engine state-liquid level compensation value relationship model establishes the relationship between the engine state information and the liquid level compensation value.

[0029] The liquid level compensation value refers to a value compensating the initial oil level measured by the oil dipstick. The liquid level compensation value can compensate the initial oil level positively or negatively relative to the current engine state. The specific compensation value is determined by the engine state-liquid level compensation value relationship model.

[0030] The principle of the engine state-liquid level compensation value relationship model is that the engine state has a decisive influence on the measured value of the oil. For example, when the engine speed is high, more oil enters the engine for lubrication; and when the engine speed is low, less oil enters the engine for lubrication. Therefore, under the same oil amount, the oil level measured at different engine speeds differs greatly. When the engine speed is high, the liquid level compensation value is large, and correspondingly, when the engine speed is low, the liquid level compensation value is small. For another example, when the engine downtime is short, the amount of oil flowing back to the oil sump is small, and at this time, a larger value should be compensated for the initial liquid level. As the downtime becomes longer, the oil gradually flows back, and the liquid level compensation value gradually becomes smaller.

[0031] The embodiment of the application comprehensively considers the influence of the engine state information on the oil level, positively or negatively compensates the initial oil level measured by the oil dipstick, models the corresponding relationship between the liquid level compensation value and the engine state information, and obtains the engine state-liquid level compensation value relationship model.

[0032] S130, the engine state-liquid level compensation value relationship model is used to process the state information to obtain the liquid level compensation value.

[0033] Exemplarily, the engine state information is input into the engine state-liquid level compensation value relationship model to obtain a compensation coefficient for the deviation of the engine oil level measurement, and then the liquid level compensation value is obtained.

[0034] S140, the initial liquid level value is corrected by using the liquid level compensation value to obtain a liquid level correction value; and an alarm information is output when the liquid level correction value exceeds a preset range; wherein the liquid level correction value represents an actual oil amount value.

[0035] The level correction value represents the actual oil level. Therefore, an oil level alarm can be generated based on the level correction value. Specifically, when the level correction value exceeds a preset range, it indicates that the actual oil level is outside a reasonable range and cannot meet user requirements. There is a risk of insufficient oil to meet lubrication requirements, or excessive oil causing oil leakage or engine damage. At this point, an alarm message is output to prompt the user to adjust the oil level appropriately. The preset range can be a user-defined oil level range that keeps the oil level within a reasonable range.

[0036] The embodiment of the present invention measures the initial liquid level value of the engine oil through the oil dipstick, and establishes an engine state-liquid level compensation value relationship model to correct the initial liquid level value. Among them, the engine state-liquid level compensation value relationship model comprehensively considers the impact of the engine state on the oil level. Therefore, using this model to correct the initial liquid level value is conducive to solving the problem of inaccurate oil level. At the same time, the engine oil amount is monitored in real time according to the preset strategy to ensure that the oil level is within a safe range, solving the problem of engine damage caused by untimely oil level monitoring and affecting the engine service life. In summary, the embodiment of the present invention can improve the accuracy of the oil level measurement results, monitor the oil level in real time, and improve the safety and service life of the engine.

[0037] On the basis of the above embodiments, an embodiment of the present invention further provides a method for establishing an engine state-liquid level compensation value relationship model, which is described in detail below but is not intended to limit the present invention.

[0038] Figure 2 : is a flow chart of a method for establishing an engine state-liquid level compensation value relationship model according to an embodiment of the present invention. Figure 2 Optionally, the method for establishing the engine state-liquid level compensation value relationship model includes the following steps:

[0039] S210 . Within the oil quantity setting range, select multiple oil quantity values ​​according to preset intervals.

[0040] The fuel level setting range can be [a1, a2], where a1 is the minimum value of the fuel level range and a2 is the maximum value of the fuel level range. The values ​​from a1 to a2 are divided into ranges according to a preset interval (for example, 0.5L), resulting in m fuel level values: a1, a1+0.5, a1+0.5, ..., a2.

[0041] S220. Set i=1.

[0042] S230: Under the i-th oil level value, set multiple stages of engine status, and record the oil level value measured by the oil dipstick when the engine is in a static working condition.

[0043] Optionally, the engine status information includes: engine speed, oil temperature, engine downtime, engine tilt angle, vehicle information, etc. Each of these will be described below.

[0044] The effect of engine speed on oil level can be understood as follows: the amount of lubricating oil entering the engine varies with engine speed. When the engine is stopped, oil flows back into the oil pan, and the dipstick reading is accurate. However, as speed increases, the dipstick reading decreases.

[0045] The effect of oil temperature on oil level can be understood as follows: measuring the shutdown temperature after the engine test, the shutdown temperature is higher when the test is more intense, and the shutdown temperature is lower when the test is milder, and the higher the temperature, the lower the oil level.

[0046] The impact of engine downtime on oil level can be understood as follows: starting from the time the engine stops, the amount of oil reflux varies over different time periods. Especially after the engine stops, the engine temperature drops, the oil viscosity increases, and the reflux speed slows down, which affects the oil level.

[0047] The effect of engine inclination angle on oil level can be understood as follows: when the oil volume is constant, if the fuel tank is tilted to the left or right, the oil may overflow on one side, thereby affecting the oil level.

[0048] The impact of vehicle information on the oil level can be understood as follows: when the vehicle acceleration changes, the oil shakes in the fuel tank, affecting the measurement of the oil level.

[0049] Specifically, taking engine speed as an example, the oil level values ​​at different engine speed stages are recorded for the i-th oil level value. For example, at oil level a1, the engine speed is set to 750 rpm, 1500 rpm, and 3000 rpm. Three different oil level values ​​are recorded while the engine is in a static state. The measured oil levels at these times are different. Based on the established prerequisites, the accurate oil level value is a1 regardless of speed changes. By recording the oil level at different speeds and comparing it with a1, the corresponding compensation amount can be determined.

[0050] S240 , determine whether i is greater than or equal to m. If not, set i=i+1 and return to execute S230 ; if so, execute S250 .

[0051] Specifically, if i <m,表明记录的油量值少于m种,需要重复固定油量值,记录不同阶段发动机状态对应的液位值的步骤。例如,在油量值为a1+0.5时,分别设定发动机左倾角为10°、15°和30°,在发动机处于静态工况下记录三种不同的液位值;又如,在油量值为a1+2时,分别设定发动机停机时间为0.5小时、1小时和1.5小时,在发动机处于静态工况下记录三种不同的液位值。

[0052] If i≥m, it indicates that the liquid level values ​​corresponding to the engine states at different stages under m oil levels have been recorded, and then the step of establishing the engine state-liquid level compensation value relationship model is executed.

[0053] S250: Establish an engine state-liquid level compensation value relationship model based on multiple oil quantity values, engine states at different stages, and liquid level values.

[0054] Specifically, the recorded multiple oil quantity values, multiple engine status and liquid level value data and the corresponding relationships between the various data are formed into a graph or table and input into the vehicle controller to obtain an engine status-liquid level compensation value relationship model.

[0055] In this embodiment, the engine state-liquid level compensation value relationship model established through engine testing can be consistent with the actual engine operating state. Repeating multiple tests to determine data can improve the accuracy of the model and improve the accuracy of oil level measurement.

[0056] In the above embodiment, a relationship model between an engine state and a liquid level compensation value is established. In other embodiments, at least two relationship models between an engine state and a liquid level compensation value may be established to further improve the accuracy of the compensation value. This is described in detail below, but is not intended to limit the present invention.

[0057] Optionally, the engine status information includes n types of information including engine speed, oil temperature, engine downtime, engine tilt angle and vehicle information, and the engine status-liquid level compensation value relationship model is an n+1 dimensional model; wherein n is a positive integer.

[0058] Optionally, the engine state-liquid level compensation value relationship model establishes a relationship between two of the engine speed, oil temperature, engine downtime, engine inclination angle and vehicle information and the liquid level compensation value; the engine state includes a first engine state and a second engine state.

[0059] For example, if n is 2, the engine state-liquid level compensation value relationship model is a three-dimensional model, where the first engine state is the engine tilt angle, and the second engine state is the vehicle acceleration. The engine tilt angle is described using the left and right tilt angles, and the vehicle acceleration is described using the upward and downward tilt angles. When the oil level value is a1+10, the engine left tilt angle is set to 10°, 15°, and 30°, respectively, and the engine upward tilt angle is set to 5°, 10°, and 15°, respectively. Different liquid level values ​​are recorded when the engine is in a static state. This liquid level value information is the set of liquid level values ​​corresponding to all combinations of the two engine states. Based on the set prerequisites, it can be seen that no matter how the two engine states change, the accurate value of the oil level is a1+10. By recording the oil levels under the two different engine states and comparing them with a1+10, the compensation values ​​corresponding to the two different engine states can be obtained.

[0060] In the step of processing the state information to obtain the liquid level compensation value, the corresponding liquid level value range is obtained according to the first engine state; and the corresponding liquid level value is obtained according to the liquid level value range and the second engine state.

[0061] In this embodiment, the relationship between the two types of engine status information and the liquid level compensation value is utilized to provide more basis for correcting the oil level, which can effectively improve the accuracy and real-time performance of the oil level measurement.

[0062] Optionally, the static operating condition of the engine is that the engine is in a horizontal position and the engine is not started or is in an idling state.

[0063] In this embodiment, when the engine is in a static working condition, the accuracy of the oil level measurement is improved, and the engine state-liquid level compensation value relationship model is made more accurate.

[0064] Optionally, the preset thresholds of the liquid level correction value include: a preset minimum liquid level value, a preset maximum liquid level value, and a preset limit liquid level value;

[0065] The alarm information includes: insufficient oil, sufficient oil, excessive oil and oil limit; if the liquid level correction value is lower than the preset minimum liquid level value, the oil level is insufficient; if the liquid level correction value is between the preset minimum liquid level value and the preset maximum liquid level value, the oil level is sufficient; if the liquid level correction value is between the preset maximum liquid level value and the preset limit liquid level value, the oil level is excessive; if the liquid level correction value exceeds the preset limit liquid level value, the oil level is limited.

[0066] For example, after testing the engine, a maximum tilt angle (left, right, up, or down) is set to ensure that the oil will not overflow at this angle. The oil volume threshold is then determined by testing at this preset maximum tilt angle. With the engine in a static state, different amounts of oil are added to the engine. After the oil level stabilizes, the oil level sensor readings and oil temperature from the vehicle's Electronic Control Unit (ECU) are recorded, and the oil level is corrected to obtain the preset minimum, maximum, and limit levels under the static state.

[0067] In this embodiment, by determining a preset threshold value of the liquid level value and setting corresponding alarm information, the oil level status can be effectively monitored in real time.

[0068] Optionally, after obtaining the liquid level correction value, the method further includes:

[0069] Displays the liquid level correction value and corresponding alarm information.

[0070] In this embodiment, real-time monitoring of the engine oil level and prompting of the user are beneficial to improving the safety of the engine.

[0071] Figure 3 This is a schematic diagram of the structure of a device for measuring the amount of engine oil provided in accordance with an embodiment of the present invention. The device provided in this embodiment can execute the method for measuring the amount of engine oil provided in any embodiment of the present invention. Figure 3 , the device comprises:

[0072] The information acquisition module 310 is used to obtain the initial liquid level value of the engine oil measured by the oil dipstick and obtain the status information of the engine;

[0073] The compensation value acquisition module 320 is configured to acquire an engine state-liquid level compensation value relationship model, wherein the engine state-liquid level compensation value relationship model establishes a relationship between engine state information and the liquid level compensation value; and uses the engine state-liquid level compensation value relationship model to process the state information to obtain the liquid level compensation value;

[0074] The correction module 330 is used to correct the initial liquid level value using the liquid level compensation value to obtain a liquid level correction value; and output an alarm message when the liquid level correction value exceeds a preset range; wherein the liquid level correction value represents the actual oil amount value.

[0075] The engine oil quantity measuring device provided in the embodiment of the present invention obtains the initial oil level and engine status information through the information acquisition module 310, obtains the engine status-level compensation value relationship model through the compensation value acquisition module 320, obtains the level compensation value, corrects the initial level value through the correction module 330, and outputs an alarm message after the level correction value exceeds the preset range, which can improve the accuracy of the oil level measurement results, monitor the oil level in real time, and improve the safety and service life of the engine.

[0076] An embodiment of the present invention further provides a vehicle, which includes an engine oil quantity measuring device as provided in any embodiment of the present invention. The technical principles and beneficial effects produced are similar and will not be described in detail.

[0077] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0078] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for measuring the amount of engine oil, characterized in that: include: Obtain the initial liquid level value of the engine oil measured by the oil dipstick, and obtain the status information of the engine; Acquire an engine state-liquid level compensation value relationship model; wherein the engine state-liquid level compensation value relationship model establishes a relationship between the engine state information and the liquid level compensation value; Using the engine state-liquid level compensation value relationship model, the state information is processed to obtain the liquid level compensation value; The initial liquid level value is corrected using the liquid level compensation value to obtain a liquid level correction value; and an alarm message is output when the liquid level correction value exceeds a preset range; wherein the liquid level correction value represents the actual oil quantity value; The method for establishing the engine state-liquid level compensation value relationship model includes: Within the oil volume setting range, select multiple oil volume values ​​according to preset intervals; Under a certain oil level value, setting multiple stages of engine status, and recording the oil level value measured by the oil dipstick when the engine is in a static working condition; Repeat the steps of fixing the oil level value and recording the corresponding oil level values ​​of the engine status at different stages; The engine state-liquid level compensation value relationship model is established according to the multiple oil quantity values, the engine states at different stages and the liquid level value.

2. The method for measuring the amount of engine oil according to claim 1, characterized in that: The engine status information includes at least one of engine speed, oil temperature, engine downtime, engine tilt angle and vehicle information.

3. The method for measuring the amount of engine oil according to claim 2, characterized in that: The engine state information includes n types of information among the engine speed, the oil temperature, the engine downtime, the engine tilt angle, and the vehicle information, and the engine state-liquid level compensation value relationship model is an n+1-dimensional model; Wherein, n is a positive integer.

4. The method for measuring the amount of engine oil according to claim 2, characterized in that: The engine state-liquid level compensation value relationship model establishes a relationship between two of the engine speed, the engine oil temperature, the engine downtime, the engine tilt angle, and the vehicle information and the liquid level compensation value; the engine state includes a first engine state and a second engine state; In the step of processing the state information to obtain the liquid level compensation value, the corresponding liquid level value range is obtained according to the first engine state; and the corresponding liquid level value is obtained according to the liquid level value range and the second engine state.

5. The method for measuring the amount of engine oil according to claim 1, characterized in that: The static working condition of the engine is that the engine is in a horizontal position and is not started or is in an idling state.

6. The method for measuring the amount of engine oil according to claim 1, characterized in that: The preset thresholds of the liquid level correction value include: a preset minimum liquid level value, a preset maximum liquid level value and a preset limit liquid level value; The alarm information includes: insufficient oil, sufficient oil, excessive oil and oil limit; if the liquid level correction value is lower than the preset minimum liquid level value, the oil is insufficient; if the liquid level correction value is between the preset minimum liquid level value and the preset maximum liquid level value, the oil is sufficient; if the liquid level correction value is between the preset maximum liquid level value and the preset limit liquid level value, the oil is excessive; if the liquid level correction value exceeds the preset limit liquid level value, the oil limit.

7. The method for measuring the amount of engine oil according to claim 1, characterized in that: After obtaining the liquid level correction value, the method further includes: The liquid level correction value is displayed, and corresponding alarm information is displayed.

8. A device for measuring the amount of engine oil, characterized in that: include: An information acquisition module is used to obtain the initial liquid level value of the engine oil measured by the oil dipstick and obtain the status information of the engine; a compensation value acquisition module, configured to acquire an engine state-liquid level compensation value relationship model, wherein the engine state-liquid level compensation value relationship model establishes a relationship between the engine state information and the liquid level compensation value; and to process the state information using the engine state-liquid level compensation value relationship model to obtain the liquid level compensation value; a correction module, configured to correct the initial liquid level value using the liquid level compensation value to obtain a liquid level correction value; and output an alarm message when the liquid level correction value exceeds a preset range; wherein the liquid level correction value represents an actual oil quantity value; The method for establishing the engine state-liquid level compensation value relationship model includes: Within the oil volume setting range, select multiple oil volume values ​​according to preset intervals; Under a certain oil level value, setting multiple stages of engine status, and recording the oil level value measured by the oil dipstick when the engine is in a static working condition; Repeat the steps of fixing the oil level value and recording the corresponding oil level values ​​of the engine status at different stages; The engine state-liquid level compensation value relationship model is established according to the multiple oil quantity values, the engine states at different stages and the liquid level value.

9. A vehicle, characterized in that: include: An engine and a vehicle control module, wherein the vehicle control module controls the engine according to the method for measuring the amount of engine oil according to any one of claims 1 to 7.

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