Engine oil consumption calculation and early warning method for vehicle engine

Abstract

The invention discloses an engine oil consumption calculation and early warning method for a vehicle engine. The engine oil consumption calculation and early warning method comprises the following steps that S1, engine operation parameters are obtained, wherein engine rotating speed and fuel consumption parameters in engine operation data are obtained; s2, extracting engine oil consumption by interpolation: extracting the engine oil consumption under a corresponding working condition from a pre-constructed engine oil consumption model through an interpolation method according to the engine rotating speed and the fuel consumption; s3, accumulative calculation and unit conversion, wherein accumulative calculation and unit conversion are conducted on the multiple sets of engine oil consumption, and accumulative engine oil consumption is obtained; and S4, comparison and alarm triggering: triggering a corresponding alarm prompt according to a comparison result of the accumulated engine oil consumption and a preset engine oil consumption limit value. By means of the method, real-time and accurate calculation of the engine oil consumption under the full working condition of the engine is achieved, the hysteresis quality and estimation errors of manual inspection are broken through, and engine oil consumption data are upgraded to a real-time continuous value from a regular discrete value.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to a method for calculating and warning oil consumption of a vehicle engine. BACKGROUND

[0002] Engine oil plays a key role in lubrication, cooling, cleaning, sealing and other aspects during vehicle operation. Oil consumption is one of the core indicators reflecting the working state of the engine, and is directly related to the service life and operation reliability of the engine. If the oil consumption is abnormal or insufficient, the internal parts of the engine (such as pistons, crankshafts, cylinder walls, etc.) will be severely worn due to lack of effective lubrication, and even cause serious faults such as overheating, cylinder pulling, and seizure. Therefore, timely and accurate control of engine oil consumption is an important focus for daily maintenance and fault prevention of vehicles.

[0003] At present, the conventional inspection method for engine oil consumption of a vehicle mainly relies on manual detection with a vernier scale: the user or the maintenance personnel needs to open the engine hood regularly, and judge whether the engine is short of oil and the approximate consumption rate by observing the height of the oil level on the vernier scale. However, this method has significant limitations. The manual inspection depends on the operation opportunity and has obvious hysteresis. Only when the oil consumption reaches the critical liquid level that can be observed by the vernier scale, the problem of lack of oil can be found, and real-time and continuous state monitoring during oil consumption cannot be realized. The estimation of the consumption rate by the height of the liquid level is greatly affected by subjective factors and has insufficient precision, which makes it difficult to provide accurate and continuous data support for the fine management of the engine (such as preventive maintenance and fault tracing analysis), and has been difficult to adapt to the needs of intelligent and real-time monitoring of the engine state of modern vehicles.

[0004] The disclosure of the above background art content is only used to assist in understanding the concept and technical solutions of the present application, and it does not necessarily belong to the prior art of the present patent application. In the absence of explicit evidence that the above content has been disclosed on the filing date of the present patent application, the above background art should not be used to evaluate the novelty and inventiveness of the present application. SUMMARY

[0005] The present application aims to provide a method for calculating and warning oil consumption of a vehicle engine to solve the technical problem of hysteresis caused by relying on manual periodic inspection of the vernier scale in the prior art.

[0006] To this end, the present application provides a method for calculating and warning oil consumption of a vehicle engine.

[0007] Preferably, the present application can also have the following technical features:

[0008] A method for calculating and warning oil consumption of a vehicle engine, comprising the following steps:

[0009] S1. Obtaining engine operating parameters: obtaining engine speed and fuel consumption parameters in engine operating data;

[0010] S2. Interpolation to extract oil consumption: according to the engine speed and fuel consumption, extracting the oil consumption under the corresponding working condition from the pre-constructed oil consumption model by interpolation method;

[0011] S3. Cumulative calculation and unit conversion: cumulative calculation and unit conversion are performed on multiple groups of the oil consumption to obtain cumulative oil consumption;

[0012] S4. Comparison and alarm triggering: according to the comparison result of the cumulative oil consumption and the preset oil consumption limit value, triggering the corresponding alarm prompt.

[0013] Preferably, the construction step of the oil consumption model comprises:

[0014] A1. Test section: test the oil consumption of a certain engine model under different speeds and different fuel consumptions;

[0015] A2. Model determination and construction: determine whether the state of oil consumption related parts and the operating boundary condition change; if not, construct the oil consumption model based on the test data; if yes, retest and construct the oil consumption model.

[0016] Preferably, it further comprises a calculation step of engine fuel ratio:

[0017] B1. Obtaining and converting cumulative fuel consumption unit: obtaining cumulative fuel consumption and converting the unit of cumulative fuel consumption to mass unit g;

[0018] B2. Calculate engine fuel ratio: calculate the engine fuel ratio according to the formula "engine fuel ratio%= (cumulative oil consumption g ÷ cumulative fuel consumption g) × 100".

[0019] Preferably, the cumulative fuel consumption is calculated in real time during the operation of the vehicle / engine, or is calculated by engine speed, fuel consumption and related parameters; the unit conversion of the fuel consumption is carried out according to the actual density of the fuel.

[0020] Preferably, the preset oil consumption limit value is set according to the difference between the upper scale liquid level and the lower scale liquid level of the engine vernier;

[0021] The alarm prompt is divided into at least two levels: when the cumulative engine oil consumption reaches a first limit value, a first-level alarm is triggered, so that the driver warning light is turned on to remind the user to check the engine oil amount; when the cumulative engine oil consumption reaches a second limit value, a second-level alarm is triggered, so that the driver warning light is turned on to remind the user to check the engine oil amount, and if the engine oil is not checked or added after a countdown of several hours, a forced reminder of limiting the engine speed and torque is triggered.

[0022] Preferably, if the vehicle user checks the engine oil level to meet the use requirements or has added engine oil to the upper scale liquid level of the vernier, the cumulative calculation of the engine oil consumption and the alarm prompt function are reset through the physical button of the vehicle or the interactive interface of the vehicle-mounted system.

[0023] Preferably, if the vehicle user checks the engine oil level to meet the use requirements or has added engine oil to the upper scale liquid level of the vernier, the cumulative calculation of the engine oil consumption and the alarm prompt function are reset through the physical button of the vehicle or the interactive interface of the vehicle-mounted system.

[0024] Preferably, the method further comprises a correction step of the engine oil consumption model:

[0025] The actual values of the engine oil consumption and the added amount fed back by the user through an APP or other tools are received; and the engine oil consumption model value in the background of the vehicle is corrected by the manufacturer of the engine or the vehicle according to the actual values fed back by the user; wherein, the coefficient correction is preferentially adopted, that is, the original engine oil consumption model is multiplied by a correction coefficient X (X>0); when the coefficient correction cannot meet the accuracy requirement, the engine oil consumption values under different speeds and fuel consumptions are corrected.

[0026] Preferably, the correction of the engine oil consumption model can also be realized by intelligent real-time correction of the engine oil consumption model through intelligent analysis software.

[0027] Preferably, the method further comprises an engine oil consumption monitoring and analyzing step:

[0028] The parameters of the engine oil consumption, the engine-fuel ratio and the reset times of the engine oil consumption calculation function are recorded and saved;

[0029] The parameters are used as analysis data of the engine or vehicle manufacturer.

[0030] Preferably, when the engine throttle and other engine oil consumption related variables are in different operating modes, the engine oil consumption model corresponding to the mode is switched to calculate the engine oil consumption.

[0031] The beneficial effects of the present application compared with the prior art include:

[0032] 1. Compared with the traditional method of "manual periodic inspection of the vernier caliper", the method of this application realizes real-time and accurate calculation of engine oil consumption under all operating conditions (covering different speeds, fuel consumption, including special operating conditions such as reverse towing) by using an oil consumption model and interpolation method. This overcomes the lag and estimation error of manual inspection, and upgrades the oil consumption data from "periodic discrete values" to "real-time continuous values", providing a high-precision foundation for subsequent early warning and analysis.

[0033] 2. The multi-level early warning mechanism of this application (level 1 advance reminder and level 2 mandatory performance limit) combined with the "reset function" not only intervenes in advance to prevent the risk of insufficient oil (ensuring that the oil level has not been consumed to the lower limit of the dipstick when the alarm is triggered, avoiding serious failures such as cylinder scoring and bearing failure due to insufficient oil), but also gives users enough flexible time to "check / add oil", thereby extending the service life of the engine and improving its operational reliability from a technical perspective.

[0034] 3. The dual correction mechanism of "user feedback correction + real-time correction by intelligent analysis software" in this application can dynamically adapt to the individual differences of different vehicles (such as the degree of engine wear and the deviation of oil consumption caused by differences in user driving habits). Through the strategy of "prioritizing coefficient correction and supplementing with direct numerical correction", the oil consumption model evolves from "factory fixed value" to "self-learning and self-optimizing dynamic model", which ensures the accuracy of oil consumption calculation for different vehicles in the long term and covers the entire life cycle of the vehicle.

[0035] 4. The "full-cycle recording and analysis" of data such as oil consumption, fuel-oil ratio, and reset frequency in this application provides engine / vehicle manufacturers with a "digital profile" of the engine's operating status. From the R&D perspective, engine design can be optimized based on "common data of models with abnormal oil consumption" (such as improving piston ring sealing and optimizing oil circulation paths). From the service perspective, vehicle malfunctions can be predicted in advance through data such as "abnormal fuel-oil ratio and abnormal reset frequency," promoting the transformation from "passive maintenance" to "proactive service" and improving after-sales service quality and customer loyalty.

[0036] 5. The fully automated calculation, early warning and data management of this application frees users from manual maintenance costs (no need to remember the time nodes for "regular oil check"); the APP feedback, vehicle interface reset and other functions allow users to intuitively participate in the "intelligent closed loop" of vehicle maintenance, which not only lowers the threshold for car use, but also enhances users' sense of control over the vehicle status and user experience. Attached Figure Description

[0037] Figure 1 This is a flowchart illustrating a specific embodiment of the present invention. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope or application of the present invention.

[0039] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0040] A method for calculating and warning of engine oil consumption in a vehicle engine is proposed. First, an oil consumption model is constructed. Taking a certain type of gasoline engine as an example, the following steps are performed: A1. Testing: On an engine bench, the engine oil consumption is tested at different speeds (e.g., 500rpm to 6000rpm) and different fuel consumption rates (covering idling, partial load, full load, etc., in g / s). The testing process needs to cover multiple operating conditions to ensure the model's comprehensiveness, including, for example, the engine's dragging condition when the vehicle is coasting (the engine is dragged by the vehicle's inertia and does not output power itself); A2. Model Determination and Construction: After the test, it is determined whether the state of oil consumption-related parts (e.g., wear of piston rings and cylinder walls) and operating boundary conditions (e.g., oil temperature, oil pressure, etc.) have changed. If there are no changes, construct an oil consumption model based on multiple sets of test data for "speed - fuel consumption - oil consumption" (which can be stored in the form of "Table 1", recording the baseline oil consumption values ​​corresponding to different combinations of speed and fuel consumption, for example, when the speed is 600 rpm and the fuel consumption is 10 g / s, the oil consumption is 1.0 × 10). -7 (g / h); If the condition of the oil consumption-related parts or the operating boundary conditions change (such as abnormal oil consumption due to engine wear), the oil consumption model will be retested and rebuilt / updated based on the new data.

[0041]

[0042] When the vehicle is running, such as Figure 1 As shown, the method for calculating and warning of vehicle engine oil consumption includes the following steps:

[0043] S1. Obtain engine operating parameters: Collect engine speed (rpm) and fuel consumption parameters from the vehicle ECU (electronic control unit) in real time (corresponding to column B "engine speed (rpm)" and column D "fuel consumption (units set according to different engine models)" in Table 2);

[0044] S2. Interpolation Extraction of Engine Oil Consumption: Based on the current "Engine Speed" and "Fuel Consumption", the engine oil consumption under the corresponding operating condition is extracted from the pre-built oil consumption model in "Table 1" using interpolation (unit: g / h, corresponding to column E "Oil Consumption (g / h)" in Table 2). In the table, "1.35691E-07" represents 1.35691 × 10⁻⁶. -7 g / h (i.e., a value that needs to be padded with 7 decimal places), "9.87577E-08" means 9.87577 × 10 -8 g / h, and so on. For example, when the time is 1 second (cell A3 in Table 2), the engine speed is 162.5 rpm and the fuel consumption is 0. The interpolation yields an oil consumption of 1.35691 × 10 g / h. - 7 g / h; at 2s (cell A4 in Table 2), the engine speed is 766.5 rpm and the fuel consumption is 24.72, interpolated to 9.87577 × 10 -8 g / h;

[0045] S3. Cumulative Calculation and Unit Conversion: The cumulative oil consumption at each time point is calculated to obtain the "cumulative oil consumption g" (corresponding to column F in Table 2). Since the unit of oil consumption is g / h, it needs to be converted to "seconds" before accumulation (formula: oil consumption per second = ...). For example, when the time is 1 second, the oil consumption per second is... The cumulative total is approximately 0.000488489g (cell F3 in Table 2). Then, convert the "cumulative oil consumption (g)" to the volume unit "L" based on the oil density (assumed to be 0.85g / mL) (corresponding to column G in Table 2, "cumulative oil consumption (L)"). The formula is: Cumulative oil consumption (L) = / (g / L), for example, 0.000488489g in cell F3 is converted to ≈5.68011×10 -7 L (cell G3 in Table 2, 5.68011E-07L);

[0046]

[0047] S4. Comparison and Alarm Trigger: Based on the comparison result between the cumulative oil consumption and the preset oil consumption limit, a corresponding alarm is triggered. The preset oil consumption limit is set according to the difference between the upper and lower scale fluid levels on the engine dipstick. Taking a certain engine model as an example, the difference between the upper and lower scale fluid levels is 8L (that is, the maximum allowable oil consumption of the engine is 8L, and the default is to add oil to the upper scale fluid level on the dipstick). Two alarm limits are set:

[0048] Level 1 alarm: When the "Cumulative oil consumption (L)" (column I in Table 2) reaches the first limit of 6L, a Level 1 alarm is triggered, the vehicle driver warning light illuminates, and the message "Please check the oil level" is displayed.

[0049] Level 2 Alarm: When the "Cumulative Oil Consumption (L)" reaches the second limit of 7L, a Level 2 alarm is triggered, the driver warning light illuminates and a voice prompt is given; if the user still does not check the oil or add oil to the level marked on the dipstick after a certain number of hours of countdown, such as 24 hours, the vehicle ECU will forcibly limit engine performance, such as the intensity of speed and torque, forcing the user to take action.

[0050] The second limit is greater than the first limit, and both the first and second limits are less than the difference between the upper and lower oil levels. The difference between the upper and lower oil levels represents the maximum amount of oil the engine can consume. It indicates the total amount of oil consumed from the "upper limit" (the ideal level after adding oil) to the "lower limit" (the critical level at which oil must be added). For example, if the difference is 8L, it means the engine can consume a maximum of 8L of oil without immediately causing serious damage. All alarms must be triggered before the oil consumption reaches the "lower limit." If the first limit is equal to or greater than the difference (e.g., a difference of 8L, with the alarm point also set at 8L), then the oil level has already reached the lower limit when the alarm is triggered, rendering the alarm meaningless as an "early warning" and becoming a "post-event notification." By requiring both the first and second limits to be less than the total difference (e.g., a difference of 8L, with alarm points set at 6L and 7L), the system can give users sufficient time to check and add oil before the engine truly faces the risk of running out, thus achieving true preventative maintenance.

[0051] If the user confirms after inspection that the oil level meets the usage requirements (not lower than the lower mark on the dipstick), or has added oil to the upper mark on the dipstick, the user can reset the cumulative calculation and alarm function of oil consumption through physical buttons on the vehicle (such as steering wheel function buttons) or the vehicle system interface (such as the "oil reset" option on the central control screen) (the cumulative value is cleared to zero and the counting starts again).

[0052] In the calculation and management of engine oil consumption, the cumulative oil consumption (absolute amount) is mainly used to directly trigger warnings, while the engine-fuel ratio (the relative proportion of oil consumption to fuel consumption) serves as a supplementary indicator. It is deeply integrated with core aspects such as oil consumption model correction, warning effectiveness verification, and engine fault diagnosis, forming a dual oil consumption management system of "absolute amount + relative proportion." This system addresses both the quantitative question of "how much has been consumed" and the qualitative question of "whether the consumption is normal," avoiding misjudgments or omissions caused by relying solely on the cumulative amount. The calculation steps for the engine-fuel ratio are as follows: B1. Obtain and convert the cumulative fuel consumption unit: Obtain the "cumulative fuel consumption (L)" (corresponding to column D of Table 2) from the vehicle / engine operating data and convert it to the mass unit g based on the actual fuel density. Taking gasoline as an example (density 0.75 g / mL), the conversion formula is: Cumulative fuel consumption (g) = Cumulative fuel consumption (L) × 1000 mL / L × 0.75 g / mL. For example, in Table 2, cell D7, "Cumulative Fuel Consumption (L)," is 0.5L, which, after conversion, is 0.5 × 1000 × 0.75 = 375g; B2. Computerized Fuel Ratio: According to the formula "Fuel Ratio % = / ×100” Computer fuel ratio (corresponding to column H “Fuel Ratio (%)” in Table 2). For example, in row 7 of Table 2 (time 5s), cell F7 “Cumulative oil consumption g” is 0.002588609g, and the cumulative fuel consumption is 375g, therefore the fuel ratio is 100. ×100≈0.000620026% (cell H7 in Table 2); As the vehicle runs, the cumulative oil consumption and fuel consumption change synchronously, and the engine-fuel ratio is dynamically updated.

[0053] The "cumulative fuel consumption" can be calculated in real time during vehicle / engine operation, or calculated using engine speed, fuel consumption, and related parameters (such as injection pulse width and air-fuel ratio). The unit conversion of fuel consumption is strictly based on the actual fuel density to ensure accuracy.

[0054] The fuel-oil ratio is not an independent parameter; it is directly related to the core features of this application, such as "correction of the oil consumption model," "multi-level early warning," and "monitoring and analysis." When a vehicle's fuel-oil ratio continuously deviates from the theoretical value of the oil consumption model under the same operating conditions during long-term operation, the manufacturer can quickly locate the "model adaptation deviation" through this abnormal data. There is no need to analyze massive amounts of raw "speed-fuel consumption-oil consumption" data one by one. Just by observing the "relative proportional anomaly" of the fuel-oil ratio, it can be determined that the original model's calculation accuracy for the vehicle is insufficient. Then, coefficient correction (such as setting a correction coefficient X=2) or direct correction of the corresponding oil consumption value can be used, greatly improving the efficiency and accuracy of model correction.

[0055] Conventional warnings rely on whether the cumulative oil consumption has reached the limit. However, the fuel-oil ratio can supplement the judgment on whether the consumption is normal. If the vehicle's fuel consumption increases sharply due to long-distance high-speed driving (high-load conditions), and the cumulative oil consumption quickly approaches the first limit (e.g., 6L), but the fuel-oil ratio remains stable within the normal range of 0.0006%, the system can determine it as "normal high-load consumption," avoiding triggering unnecessary emergency warnings and reducing user inconvenience. If the cumulative oil consumption has not reached the first limit (e.g., only 4L), but the fuel-oil ratio suddenly spikes from 0.0006% to 0.005%, the system can determine that there is "abnormal oil consumption" (e.g., piston ring leakage, valve stem seal damage causing oil to enter the combustion chamber). At this time, an "abnormal consumption reminder" (different from the conventional cumulative amount warning) is triggered, guiding users to check for faults in advance and avoiding missing sudden problems due to relying solely on the cumulative amount.

[0056] When manufacturers analyze data from multiple vehicles, the fuel-oil ratio can eliminate the interference of "differences in total fuel consumption" (e.g., the total fuel consumption of urban commuter vehicles and long-haul trucks may differ greatly, but their fuel-oil ratios under the same operating conditions are comparable). If the fuel-oil ratio of a certain batch of vehicles is generally higher than that of other batches (e.g., an average of 0.001% vs. a typical 0.0006%), it can be traced back to a design deviation in the piston ring sealing of that batch of engines, providing direct data support for engine optimization. If the fuel-oil ratio of a certain model increases significantly under driving habits of "frequent rapid acceleration", the oil circulation system can be optimized accordingly (e.g., enhancing the oil sealing performance under high-speed conditions), improving the engine's adaptability to different driving habits.

[0057] Although the aforementioned oil consumption model can cover most common engine operating conditions and provide an accurate benchmark for real-time calculation of oil consumption, the oil consumption characteristics of the vehicle will be affected by the differences in individual engine wear (such as the piston ring sealing gradually changing with mileage), fluctuations in user driving habits (such as frequent rapid acceleration or long-term idling), and different usage environments (low temperature, high altitude, etc.) during long-term operation, resulting in deviations between the calculation results of the initial model and the actual oil consumption. If this deviation accumulates over a long period, it may affect the accuracy of oil consumption calculation, leading to a shift in warning timing or misjudgment. Therefore, it is necessary to optimize the model parameters through a dynamic correction mechanism to ensure that it always adapts to the actual operating conditions of the vehicle. The correction steps for the oil consumption model are as follows: User feedback correction: Users provide feedback on the actual values ​​of oil consumption and addition through the vehicle's APP or other tools (such as the feedback interface of the vehicle information system) (for example, 4L of oil was actually added during maintenance, which differs from the theoretical consumption calculated by the model); The engine or car manufacturer corrects the oil consumption model value in the vehicle's background based on the actual values ​​provided by the user; During correction, coefficient correction is given priority (i.e., multiplying the original oil consumption model by a correction coefficient X, where X>0). For example, if the user reports that the actual oil consumption is 20% higher than the model's calculated value, then let X=1.2, and multiply the oil consumption for all operating conditions in "Table 1" by 1.2 (e.g., the oil consumption at the original speed of 600rpm and fuel consumption of 10g / s is 1.0×10). -7 g / h, corrected to 1.2×10 -7 When the coefficient correction accuracy is insufficient, the oil consumption value under different speeds and fuel consumption is directly corrected (for example, for reversing conditions, the original model's oil consumption is 5.0 × 10 g / h). -8 g / h, corrected to 6.0 × 10 g / h based on actual data. -8 g / h, and update to the manufacturer's backend model).

[0058] Intelligent Real-Time Correction: In addition to user feedback-based corrections, intelligent analysis software can also intelligently and in real-time correct the oil consumption model based on actual engine operating data (such as long-term collected big data on "speed-fuel consumption-actual oil consumption"). For example, the intelligent analysis software uses AI algorithms to learn the operating habits and oil consumption patterns of different vehicles, dynamically adjusting the baseline value of oil consumption in the model to improve calculation accuracy.

[0059] During vehicle operation, parameters such as oil consumption, fuel-oil ratio, and the number of times the oil consumption calculation function has been reset are recorded and stored in the vehicle's database. Engine or vehicle manufacturers can extract this data for analysis: analyzing oil consumption patterns: comparing oil consumption rates under congested urban conditions and highway driving conditions, and studying the impact of different driving habits (rapid acceleration, smooth driving) on ​​oil consumption; assessing the rationality of the fuel-oil ratio: if a vehicle's fuel-oil ratio is consistently higher than the average level for the same model, it can be determined that the engine may have abnormal oil consumption (such as piston ring leakage), providing a basis for troubleshooting; and statistically analyzing the reset function usage rate: the number of times the oil consumption calculation function has been reset indirectly reflects the user's attention to oil consumption and the timeliness of maintenance, providing data support for optimizing maintenance cycles.

[0060] When engine oil consumption-related variables such as throttle position are in different operating modes (e.g., "Economy Mode" and "Sport Mode"), the oil consumption characteristics differ due to variations in engine load and fuel injection strategies. In this case, the system switches to the corresponding oil consumption model to calculate oil consumption. For example, in "Sport Mode," the engine speed is higher and the load is greater; therefore, the baseline oil consumption value for the same fuel consumption in the corresponding oil consumption model will be higher than in "Economy Mode," ensuring accurate calculations across different modes.

[0061] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0062] Although exemplary embodiments of the invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the invention without departing from the central concepts of the invention described herein. Therefore, the invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the invention.

Claims

1. A method of calculating and warning of oil consumption of a vehicle engine, characterized by, The method comprises the following steps: S1. Obtain engine operating parameters: obtain engine speed and fuel consumption parameters in engine operating data; S2. Interpolation extraction of oil consumption: according to the engine speed and fuel consumption, extract the oil consumption under the corresponding working condition from the pre-constructed oil consumption model by interpolation method; S3. Accumulative calculation and unit conversion: accumulate and convert the oil consumption of multiple groups to obtain the accumulative oil consumption; S4. Comparison and alarm triggering: according to the comparison result of the accumulative oil consumption and the preset oil consumption limit value, trigger the corresponding alarm prompt.

2. The engine oil consumption amount calculation and warning method of a vehicle according to claim 1, characterized by, The construction steps of the oil consumption model comprise: A1. Test link: test the oil consumption of a certain engine model under different speeds and different fuel consumptions; A2. Model determination and construction: determine whether the state of oil consumption related parts and the operating boundary condition change; if not, construct the oil consumption model based on the test data; if yes, retest and construct the oil consumption model.

3. The method of claim 1, wherein Further comprising the calculation steps of the engine-fuel ratio: B1. Obtain and convert the accumulative fuel consumption unit: obtain the accumulative fuel consumption and convert the unit of the accumulative fuel consumption to mass unit g; B2. Calculate the engine-fuel ratio: calculate the engine-fuel ratio according to the formula "engine-fuel ratio%= (accumulative oil consumption g ÷ accumulative fuel consumption g) × 100".

4. The method of claim 3, wherein The accumulative fuel consumption is obtained by real-time calculation during vehicle / engine operation, or by engine speed, fuel consumption and related parameters; the unit conversion of the fuel consumption is carried out according to the actual density of the fuel.

5. The method of claim 1, wherein The preset oil consumption limit value is set according to the difference between the upper scale liquid level and the lower scale liquid level of the engine vernier; The alarm prompt is divided into at least two levels: when the accumulative oil consumption reaches the first limit value, trigger the first level alarm to make the driver warning light turn on to remind the user to check the oil quantity; When the accumulative oil consumption reaches the second limit value, trigger the second level alarm to make the driver warning light turn on to remind the user to check the oil quantity, and if the oil is not checked or added after a certain number of hours of countdown, trigger the forced reminder of limiting engine speed and torque; Wherein, the second limit value is greater than the first limit value, and the first limit value and the second limit value are both less than the difference between the upper scale liquid level and the lower scale liquid level.

6. The method of claim 5, wherein If the vehicle user checks the oil liquid level to meet the use requirement or has added oil to the upper scale liquid level of the vernier, reset the accumulative calculation of the oil consumption and the alarm prompt function through the vehicle physical button or the vehicle-mounted system interactive interface.

7. The method of claim 1, wherein Further comprising the correction steps of the oil consumption model: Receive the actual values of the oil consumption and the added amount fed back by the user through the APP or other tools; the manufacturer of the engine or automobile corrects the oil consumption model value in the vehicle background according to the actual values fed back by the user; wherein, the coefficient correction is preferred, that is, multiplying the original oil consumption model by a correction coefficient X (X>0); when the coefficient correction cannot meet the accuracy requirement, the oil consumption values under different speeds and fuel consumptions are corrected.

8. The method of claim 7, wherein The correction of the oil consumption model can also be made by intelligent analysis software for intelligent real-time correction of the oil consumption model.

9. The method of claim 1, wherein The oil consumption monitoring and analysis step is also included: The parameters of oil consumption, fuel consumption ratio, and the number of times of resetting the oil consumption calculation function are recorded and saved. The parameters are used as analysis data of the engine or vehicle manufacturer.

10. The method of claim 1, wherein When the engine throttle and other oil consumption related variables are in different operating modes, the oil consumption model corresponding to the mode is switched to calculate the oil consumption.

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