Engine oil pressure fault early warning method and device, computer device and storage medium

Abstract

This application proposes an engine oil pressure fault early warning method, device, computer equipment, and storage medium. The engine oil pressure fault early warning method includes: acquiring multiple operating status parameters of the current vehicle and real-time oil pressure data, including vehicle speed, road slope, engine speed, and engine output torque; for any operating status parameter, selecting a lower limit threshold and a duration threshold for oil pressure that match the operating status parameter; if the real-time oil pressure data is less than the lower limit threshold and the duration of low oil pressure is greater than the duration threshold, then the operating status parameter is determined to meet a preset alarm condition; when multiple operating status parameters meet the corresponding preset alarm conditions, a low oil pressure fault alarm is triggered. The embodiments of this application can significantly reduce the probability of false alarms for low oil pressure faults.

Description

Technical Field

[0001] This application relates to the field of engine oil monitoring technology, specifically to an engine oil pressure fault early warning method, device, computer equipment, and storage medium. Background Technology

[0002] Diesel engine lubrication systems rely on engine oil to create an oil film that protects friction pairs such as the crankshaft, connecting rods, and camshaft. Oil pressure is a core indicator of the lubrication system's operating status. Current diesel engine fault diagnosis strategies use a single, fixed oil pressure threshold to determine low oil pressure faults. The controller simply compares the collected oil pressure value with a uniform lower limit in real time; once the oil pressure falls below this fixed value, a fault alarm is triggered directly. During vehicle operation, conditions such as cold start, hill climbing, and low speed / low load can easily cause momentary fluctuations and short-term drops in oil pressure from the oil pressure sensor. These are not necessarily indicative of a genuine lubrication system fault, but the existing simple judgment logic frequently outputs false fault alarms, easily leading drivers to misdiagnose engine damage, increasing the frequency of vehicle repairs, and severely impacting the customer experience. Summary of the Invention

[0003] In view of this, this application proposes an engine oil pressure fault early warning method, device, computer equipment and storage medium to solve the problem that the existing diesel engine oil pressure fault diagnosis relies solely on a uniform oil pressure threshold for direct alarm, and that instantaneous oil pressure fluctuations of sensors under various vehicle operating conditions will cause a large number of false fault alarms, misleading drivers and increasing after-sales maintenance costs.

[0004] The first aspect of this application provides a method for early warning of engine oil pressure failure, the method comprising: The system acquires multiple operating status parameters of the current vehicle and real-time oil pressure data. The operating status parameters include vehicle speed, road slope, engine speed, and engine output torque. For any operating state parameter, filter out the lower limit threshold of oil pressure and the duration threshold that match the operating state parameter; If the real-time oil pressure value is less than the lower limit threshold of oil pressure, and the duration of low oil pressure is greater than the duration threshold, then the operating status parameter is determined to meet the preset alarm condition. When all of the aforementioned operating status parameters meet the corresponding preset alarm conditions, a low oil pressure fault alarm is triggered.

[0005] In this embodiment of the application, before acquiring multiple operating status parameters of the current vehicle and the real-time oil pressure data, the method further includes: Each running status parameter is pre-divided into multiple parameter ranges; For any parameter range of any operating state parameter, set a lower limit threshold for oil pressure and a duration threshold corresponding to the parameter range.

[0006] In this embodiment of the application, each running status parameter is pre-divided into multiple parameter ranges, including: The vehicle speed is divided into five speed ranges, and each speed range is pre-stored with a corresponding lower limit threshold for engine oil pressure and a speed duration threshold. The five speed ranges include: 0~20km / h, 21~40km / h, 41~60km / h, 61~80km / h, and 81~100km / h. The road surface slope is divided into five slope ranges, and each slope range is pre-stored with a corresponding lower limit threshold for engine oil pressure and a slope duration threshold. The five slope ranges include: 0-5%, 6-10%, 11-15%, 16-20%, and 21-25%. The engine speed is divided into five speed ranges, and each speed range is pre-stored with a corresponding lower limit threshold for oil pressure and a speed duration threshold. The five speed ranges include: 0 r / min, 600 r / min, 601 to 1000 r / min, 1001 to 1500 r / min, and 1501 r / min and above. The engine output torque is divided into five torque ranges. Each torque range is pre-stored with a corresponding lower limit threshold for torque oil pressure and a torque duration threshold. The five torque ranges include: 0-20%, 21%-40%, 41%-60%, 61%-80%, and 81%-100%.

[0007] In this embodiment of the application, if the real-time oil pressure value is less than the lower limit threshold of the oil pressure, and the duration of low oil pressure is greater than the duration threshold, then the operating status parameter is determined to meet the preset alarm conditions, including: Compare the real-time oil pressure reading with the lower limit threshold oil pressure. When the oil pressure collected value is continuously lower than the lower limit threshold of the oil pressure, the low pressure timing duration corresponding to the operating status parameter is continuously accumulated to determine the current low oil pressure duration of the vehicle. When the duration of low oil pressure exceeds the duration threshold, the operating status parameter is determined to meet the preset alarm condition.

[0008] In this embodiment, each of the multiple operating status parameters is configured with a dedicated low-pressure timing unit; when the oil pressure corresponding to any operating status parameter recovers to or above the corresponding lower limit threshold of oil pressure, the low-pressure timing duration corresponding to the operating status parameter is cleared, while the low-pressure timing duration of the other operating status parameters remains unchanged.

[0009] In this embodiment of the application, the method further includes: If any operating status parameter does not meet the corresponding preset alarm condition, the low oil pressure fault alarm is disabled. At the same time, the operating status parameters and the real-time oil pressure are continuously collected and updated. The steps of obtaining multiple operating status parameters and the real-time oil pressure are repeatedly executed until all of the multiple operating status parameters meet the corresponding preset alarm condition, at which point the low oil pressure fault alarm is triggered.

[0010] In this embodiment of the application, after triggering the low oil pressure fault alarm, at least one of the following actions is performed: illuminating the fault warning light, storing the fault code, pushing the oil pressure fault prompt to the vehicle instrument panel, and limiting the maximum output torque of the engine.

[0011] An embodiment of the second aspect of this application provides an engine oil pressure fault early warning device, comprising: The data acquisition module is used to acquire multiple operating status parameters of the current vehicle and the real-time oil pressure data. The operating status parameters include vehicle speed, road slope, engine speed, and engine output torque. The threshold filtering module is used to filter out the lower limit threshold of oil pressure and the duration threshold that match any operating state parameter. The condition judgment module is used to determine that the operating status parameter meets the preset alarm condition if the real-time oil pressure acquisition value is less than the lower limit threshold of oil pressure and the duration of low oil pressure is greater than the duration threshold. The early warning trigger module is used to trigger a low oil pressure fault alarm when all of the multiple operating status parameters meet the corresponding preset alarm conditions.

[0012] An embodiment of the third aspect of this application provides a computer device including a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, and the processor executing the computer instructions to perform the engine oil pressure fault early warning method described in the first aspect.

[0013] An embodiment of the fourth aspect of this application provides a computer-readable storage medium storing computer instructions for causing a computer to execute the engine oil pressure fault early warning method described in the first aspect above.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention independently configures and matches the lower limit of oil pressure and the duration threshold based on four types of operating parameters: vehicle speed, slope, speed and torque. Each type of parameter is judged separately to determine whether the alarm condition is met. The fault alarm is triggered only when all four types of parameters meet the alarm condition. The multi-layer filter filters the false faults caused by the instantaneous oil pressure fluctuation of the sensor, greatly reduces the probability of false alarms of low oil pressure faults, and reduces unnecessary panic of drivers and unnecessary vehicle maintenance.

[0015] 2. Each operating parameter is independently divided into five operating condition ranges, and each range is independently calibrated with a dedicated judgment threshold. This can match the actual lubrication needs under different driving conditions and engine loads. Compared with the solution of uniform oil pressure thresholds for all operating conditions, the fault judgment standard is closer to the actual operating characteristics of the engine, taking into account both lubrication safety and the ability to prevent false alarms.

[0016] 3. Each of the four types of operating parameters is equipped with an independent low-pressure timing unit. When the oil pressure of a single parameter returns to normal, only its own timing data is reset, without interfering with the timing results of other parameters. This avoids the global timing being reset due to a sudden rise in oil pressure under a single operating condition, thus preventing the failure to detect real faults and improving the reliability of fault identification.

[0017] 4. After a fault alarm is triggered, multiple protective actions such as fault storage, instrument prompts, and torque limiting protection can be executed simultaneously. While reminding the driver of the fault, the engine output is limited to avoid insufficient lubrication causing damage to friction pairs such as crankshaft and camshaft, and bearing failure, thus effectively protecting the engine body. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A flowchart illustrating an engine oil pressure fault early warning method according to an embodiment of this application is shown. Figure 2 This illustration shows a structural schematic diagram of an engine oil pressure fault early warning device according to an embodiment of this application; Figure 3 This illustration shows a schematic diagram of the structure of a computer device according to an embodiment of this application; Figure 4A schematic diagram of a storage medium provided in one embodiment of this application is shown. Detailed Implementation

[0019] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0020] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application pertains.

[0021] Example 1: According to an embodiment of this application, an embodiment of an engine oil pressure fault early warning method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0022] This embodiment provides a method for early warning of engine oil pressure failure. Figure 1 This is a flowchart of an engine oil pressure fault early warning method according to an embodiment of this application, such as... Figure 1 As shown, the process includes the following steps: Step S101: Obtain multiple operating status parameters of the current vehicle and real-time oil pressure data.

[0023] Specifically, the engine ECU periodically collects four types of operating status parameters: vehicle speed, road slope, engine real-time speed, and engine output torque, while simultaneously collecting the real-time oil pressure value output by the oil pressure sensor.

[0024] In some specific embodiments, before step S101, the method further includes steps a1-a2: Step a1: Divide each running status parameter into multiple parameter ranges in advance.

[0025] Specifically, the vehicle speed, road gradient, engine speed, and engine output torque are each pre-divided into five ranges. For each range, an independent lower limit threshold for oil pressure and an independent duration threshold are calibrated and stored in the ECU's non-volatile memory. 1) Speed ​​range: 0~20km / h, 21~40km / h, 41~60km / h, 61~80km / h, 81~100km / h; 2) Slope range: 0–5%, 6–10%, 11–15%, 16–20%, 21–25%; 3) Speed ​​range: 0 r / min, 600 r / min, 601~1000 r / min, 1001~1500 r / min, 1501 r / min and above; 4) Torque load range: 0~20%, 21%~40%, 41%~60%, 61%~80%, 81%~100%.

[0026] Step a2: For any parameter range of any operating state parameter, set the lower limit threshold of oil pressure and the duration threshold corresponding to the parameter range.

[0027] Specifically, for each parameter range of each operating state parameter, a corresponding lower limit threshold for oil pressure and a duration threshold are set, as shown in Tables 1 to 4: Table 1

[0028] Table 2

[0029] Table 3

[0030] Table 4

[0031] Step S102: For any operating state parameter, filter out the lower limit threshold of oil pressure and the duration threshold that match the operating state parameter.

[0032] Specifically, for each operating parameter—vehicle speed, gradient, engine speed, and torque—the system matches the current parameter value to its corresponding range and retrieves the specific lower limit threshold for oil pressure and the duration threshold for that range. These four types of parameters are matched independently and do not share thresholds. For example, when the torque is 25%, it falls within the 21%-40% range, and the corresponding lower limit threshold for oil pressure is D2, and the duration threshold is TD2. Another example: when the engine speed is 700, it falls within the 601-1000 range, and the corresponding lower limit threshold for oil pressure is C3, and the duration threshold is TC3.

[0033] Step S103: If the real-time oil pressure value is less than the lower limit threshold of oil pressure, and the duration of low oil pressure is greater than the duration threshold, then the operating status parameter is determined to meet the preset alarm condition.

[0034] Specifically, independent low-voltage timing units are assigned to the four types of operating state parameters, and the judgment logic is executed separately. Taking vehicle speed as an example, the execution logic for gradient, speed, and torque is completely consistent, as follows: Step S1031: Compare the real-time oil pressure with the lower limit threshold of the oil pressure that matches the operating state parameter; Step S1032: If the oil pressure is greater than or equal to the lower limit threshold, immediately reset the timing duration corresponding to the parameter to zero, and determine that the parameter does not meet the alarm conditions. Step S1033: If the oil pressure continues to be lower than the lower limit threshold, the timing unit continues to accumulate the time according to the fixed control cycle of the ECU; Step S1034: When the cumulative low-pressure duration exceeds the duration threshold corresponding to the parameter, mark the operating parameter as meeting the preset alarm conditions; otherwise, it does not meet the conditions.

[0035] Step S104: When all of the multiple operating status parameters meet the corresponding preset alarm conditions, a low oil pressure fault alarm is triggered.

[0036] Specifically, the low oil pressure fault alarm is triggered only when all four operating status parameters meet their respective preset alarm conditions.

[0037] More specifically, if any operating status parameter does not meet the corresponding preset alarm condition, the low oil pressure fault alarm is disabled, and the operating status parameter and the real-time oil pressure value are continuously collected and updated. The steps of obtaining multiple operating status parameters and the real-time oil pressure value of the current vehicle are executed in a loop until all of the multiple operating status parameters meet the corresponding preset alarm condition, at which point the low oil pressure fault alarm is triggered.

[0038] In some specific embodiments, after triggering the low oil pressure fault alarm, the ECU performs at least one protective operation: illuminating the instrument panel oil pressure fault warning light, storing a permanent fault code, pushing a text fault message to the vehicle's instrument panel, and limiting the engine's maximum output torque to reduce the risk of wear on the friction pairs.

[0039] In some specific embodiments, after the alarm is triggered, the method further includes: continuously collecting data in a loop, and when any operating parameter no longer meets its own alarm conditions, immediately clearing the fault alarm prompt and releasing the engine torque limiting protection.

[0040] In some specific embodiments, the engine oil pressure fault early warning method described in this application can be used inside the engine ECU and includes four main functional modules: Data acquisition module: electrically connected to vehicle speed sensor, slope sensor, speed sensor, torque acquisition unit, and oil pressure sensor, periodically reads all operating parameters and oil pressure acquisition values; Threshold filtering module: Built-in storage unit stores the lower limit of oil pressure and duration threshold corresponding to each parameter range, and retrieves and matches the corresponding threshold based on real-time parameter values; Condition judgment module: It has four built-in independent timing units, each corresponding to four types of operating parameters, and independently completes oil pressure comparison, timing accumulation, single parameter alarm condition judgment, and outputs four independent judgment identifiers; Early warning trigger module: Receives four judgment flags and performs logical AND operation; when all flags meet the conditions, it outputs an alarm command and controls the instrument, fault storage, and torque limiting unit to perform corresponding actions.

[0041] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention independently configures and matches the lower limit of oil pressure and the duration threshold based on four types of operating parameters: vehicle speed, slope, speed and torque. Each type of parameter is judged separately to determine whether the alarm condition is met. The fault alarm is triggered only when all four types of parameters meet the alarm condition. The multi-layer filter filters the false faults caused by the instantaneous oil pressure fluctuation of the sensor, greatly reduces the probability of false alarms of low oil pressure faults, and reduces unnecessary panic of drivers and unnecessary vehicle maintenance.

[0042] 2. Each operating parameter is independently divided into five operating condition ranges, and each range is independently calibrated with a dedicated judgment threshold. This can match the actual lubrication needs under different driving conditions and engine loads. Compared with the solution of uniform oil pressure thresholds for all operating conditions, the fault judgment standard is closer to the actual operating characteristics of the engine, taking into account both lubrication safety and the ability to prevent false alarms.

[0043] 3. Each of the four types of operating parameters is equipped with an independent low-pressure timing unit. When the oil pressure of a single parameter returns to normal, only its own timing data is reset, without interfering with the timing results of other parameters. This avoids the global timing being reset due to a sudden rise in oil pressure under a single operating condition, thus preventing the failure to detect real faults and improving the reliability of fault identification.

[0044] 4. After a fault alarm is triggered, multiple protective actions such as fault storage, instrument prompts, and torque limiting protection can be executed simultaneously. While reminding the driver of the fault, the engine output is limited to avoid insufficient lubrication causing damage to friction pairs such as crankshaft and camshaft, and bearing failure, thus effectively protecting the engine body.

[0045] Example 2: Corresponding to the above implementation methods for engine oil pressure fault early warning, this application also provides an engine oil pressure fault early warning device for executing the engine oil pressure fault early warning method described in any of the above embodiments. Figure 2 As shown, the engine oil pressure fault warning device includes: The data acquisition module is used to acquire multiple operating status parameters of the current vehicle and the real-time oil pressure data. The operating status parameters include vehicle speed, road slope, engine speed, and engine output torque. The threshold filtering module is used to filter out the lower limit threshold of oil pressure and the duration threshold that match any operating state parameter. The condition judgment module is used to determine that the operating status parameter meets the preset alarm condition if the real-time oil pressure acquisition value is less than the lower limit threshold of oil pressure and the duration of low oil pressure is greater than the duration threshold. The early warning trigger module is used to trigger a low oil pressure fault alarm when all of the multiple operating status parameters meet the corresponding preset alarm conditions.

[0046] Optionally, the device further includes: a threshold setting module, used to pre-divide each operating state parameter into multiple parameter ranges; and for any parameter range of any operating state parameter, to set a lower limit threshold for oil pressure and a duration threshold corresponding to the parameter range.

[0047] Optionally, the threshold setting module is further configured to divide the vehicle speed into five speed ranges, with each speed range pre-stored with a corresponding lower limit threshold for engine oil pressure and a speed duration threshold; the five speed ranges include: 0–20 km / h, 21–40 km / h, 41–60 km / h, 61–80 km / h, and 81–100 km / h; and to divide the road gradient into five gradient ranges, with each gradient range pre-stored with a corresponding lower limit threshold for engine oil pressure and a gradient duration threshold; the five gradient ranges include: 0–5%, 6–10%, 11–15%, 16–20%, and 21–25%; The engine speed is divided into five speed ranges, and each speed range is pre-stored with a corresponding lower limit threshold for oil pressure and a speed duration threshold. The five speed ranges are: 0 r / min, 600 r / min, 601-1000 r / min, 1001-1500 r / min, and 1501 r / min and above. The engine output torque is divided into five torque ranges, and each torque range is pre-stored with a corresponding lower limit threshold for oil pressure and a torque duration threshold. The five torque ranges are: 0-20%, 21%-40%, 41%-60%, 61%-80%, and 81%-100%.

[0048] Optionally, the condition judgment module is also used to compare the real-time oil pressure acquisition value with the lower limit threshold of oil pressure; when the oil pressure acquisition value is continuously less than the lower limit threshold of oil pressure, the low pressure timing duration corresponding to the operating status parameter is continuously accumulated to determine the current low oil pressure duration of the vehicle; when the low oil pressure duration is greater than the duration threshold, it is determined that the operating status parameter meets the preset alarm condition.

[0049] Optionally, each of the multiple operating status parameters is configured with a dedicated low-pressure timing unit; when the oil pressure corresponding to any operating status parameter recovers to or above the corresponding lower limit threshold of oil pressure, the low-pressure timing duration corresponding to the operating status parameter is cleared, while the low-pressure timing duration of the other operating status parameters remains unchanged.

[0050] Optionally, the device further includes: a cyclic execution module, used to disable the low oil pressure fault alarm if any operating status parameter does not meet the corresponding preset alarm condition, while continuously collecting and updating the operating status parameters and the real-time oil pressure value, and cyclically executing the steps of acquiring multiple operating status parameters and the real-time oil pressure value of the current vehicle, until the multiple operating status parameters all meet the corresponding preset alarm conditions, and then triggering the low oil pressure fault alarm.

[0051] Optionally, after triggering the low oil pressure fault alarm, at least one of the following actions may be performed: illuminate the fault warning light, store the fault code, push an oil pressure fault prompt to the vehicle's instrument panel, or limit the engine's maximum output torque.

[0052] The engine oil pressure fault early warning device and the engine oil pressure fault early warning method provided in the above embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application stored therein.

[0053] This application also provides a computer device for executing the above-described engine oil pressure fault early warning method. Please refer to... Figure 3 This illustrates a schematic diagram of a computer device provided by some embodiments of this application. For example... Figure 3 As shown, the computer device 3 includes: a processor 300, a memory 301, a bus 302, and a communication interface 303. The processor 300, the communication interface 303, and the memory 301 are connected through the bus 302. The memory 301 stores a computer program that can run on the processor 300. When the processor 300 runs the computer program, it executes the engine oil pressure fault early warning method provided in any of the foregoing embodiments of this application.

[0054] The memory 301 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 303 (which can be wired or wireless), such as the Internet, wide area network, local area network, or metropolitan area network.

[0055] Bus 302 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. The memory 301 is used to store programs. After receiving an execution instruction, the processor 300 executes the program. The engine oil pressure fault early warning method disclosed in any of the foregoing embodiments can be applied to the processor 300, or implemented by the processor 300.

[0056] The processor 300 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of the processor 300 or by instructions in software form. The processor 300 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), an off-the-shelf programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules may reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 301. The processor 300 reads the information in memory 301 and, in conjunction with its hardware, completes the steps of the above method.

[0057] The computer equipment provided in this application embodiment and the engine oil pressure fault early warning method provided in this application embodiment are based on the same inventive concept and have the same beneficial effects as the methods they adopt, operate or implement.

[0058] This application also provides a computer-readable storage medium corresponding to the engine oil pressure fault early warning method provided in the foregoing embodiments. Please refer to... Figure 4 The computer-readable storage medium shown is an optical disc 30, on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it executes the engine oil pressure fault warning method provided in any of the foregoing embodiments.

[0059] It should be noted that examples of the computer-readable storage medium may also include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other optical and magnetic storage media, which will not be elaborated here.

[0060] The computer-readable storage medium provided in the above embodiments of this application and the engine oil pressure fault early warning method provided in the embodiments of this application are based on the same inventive concept and have the same beneficial effects as the methods adopted, run or implemented by the application programs stored therein.

[0061] It should be noted that: Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this application may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0062] Similarly, it should be understood that, in order to simplify this application and aid in understanding one or more of the various inventive aspects, in the above description of exemplary embodiments of this application, various features of this application are sometimes grouped together in a single embodiment, figure, or description thereof. However, this disclosure should not be construed as reflecting a schematic diagram in which the claimed application requires more features than are expressly recited in each claim. Rather, as reflected in the following claims, inventive aspects lie in fewer than all features of a single foregoing disclosed embodiment. Therefore, the claims following the detailed description are hereby expressly incorporated into that detailed description, wherein each claim itself is a separate embodiment of this application.

[0063] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features but not others included in other embodiments, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, in the following claims, any of the claimed embodiments can be used in any combination.

[0064] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for early warning of engine oil pressure faults, characterized in that, The method includes: The system acquires multiple operating status parameters of the current vehicle and real-time oil pressure data. The operating status parameters include vehicle speed, road slope, engine speed, and engine output torque. For any operating state parameter, filter out the lower limit threshold of oil pressure and the duration threshold that match the operating state parameter; If the real-time oil pressure value is less than the lower limit threshold of oil pressure, and the duration of low oil pressure is greater than the duration threshold, then the operating status parameter is determined to meet the preset alarm condition. When all of the aforementioned operating status parameters meet the corresponding preset alarm conditions, a low oil pressure fault alarm is triggered.

2. The method according to claim 1, characterized in that, Before acquiring multiple operating status parameters of the current vehicle and the real-time oil pressure value, the method further includes: Each operating status parameter is pre-divided into multiple parameter ranges; For any parameter range of any operating state parameter, set a lower limit threshold for oil pressure and a duration threshold corresponding to the parameter range.

3. The method according to claim 2, characterized in that, Each running status parameter is pre-divided into multiple parameter ranges, including: The vehicle speed is divided into five speed ranges, and each speed range is pre-stored with a corresponding lower limit threshold for engine oil pressure and a speed duration threshold. The five speed ranges include: 0~20km / h, 21~40km / h, 41~60km / h, 61~80km / h, and 81~100km / h. The road surface slope is divided into five slope ranges, and each slope range is pre-stored with a corresponding lower limit threshold for engine oil pressure and a slope duration threshold. The five slope ranges include: 0-5%, 6-10%, 11-15%, 16-20%, and 21-25%. The engine speed is divided into five speed ranges, and each speed range is pre-stored with a corresponding lower limit threshold for oil pressure and a speed duration threshold. The five speed ranges include: 0 r / min, 600 r / min, 601 to 1000 r / min, 1001 to 1500 r / min, and 1501 r / min and above. The engine output torque is divided into five torque ranges. Each torque range is pre-stored with a corresponding lower limit threshold for torque oil pressure and a torque duration threshold. The five torque ranges include: 0-20%, 21%-40%, 41%-60%, 61%-80%, and 81%-100%.

4. The method according to claim 1 or 2, characterized in that, If the real-time oil pressure value is less than the lower limit threshold of oil pressure, and the duration of low oil pressure exceeds the duration threshold, then the operating status parameter is determined to meet the preset alarm conditions, including: Compare the real-time oil pressure reading with the lower limit threshold oil pressure. When the oil pressure collected value is continuously lower than the lower limit threshold of the oil pressure, the low pressure timing duration corresponding to the operating status parameter is continuously accumulated to determine the current low oil pressure duration of the vehicle. When the duration of low oil pressure exceeds the duration threshold, the operating status parameter is determined to meet the preset alarm condition.

5. The method according to claim 4, characterized in that, Each of the multiple operating status parameters is configured with a dedicated low-pressure timing unit; when the oil pressure corresponding to any operating status parameter recovers to the corresponding lower limit threshold or above, the low-pressure timing duration corresponding to the operating status parameter is reset to zero, while the low-pressure timing duration of the other operating status parameters remains unchanged.

6. The method according to claim 1 or 2, characterized in that, The method further includes: If any operating status parameter does not meet the corresponding preset alarm condition, the low oil pressure fault alarm is disabled. At the same time, the operating status parameters and the real-time oil pressure are continuously collected and updated. The steps of obtaining multiple operating status parameters and the real-time oil pressure are repeatedly executed until all of the multiple operating status parameters meet the corresponding preset alarm condition, at which point the low oil pressure fault alarm is triggered.

7. The method according to claim 1 or 2, characterized in that, After triggering the low oil pressure fault alarm, perform at least one of the following actions: illuminate the fault warning light, store the fault code, push an oil pressure fault prompt to the vehicle's instrument panel, or limit the engine's maximum output torque.

8. An engine oil pressure fault early warning device, characterized in that, The device includes: The data acquisition module is used to acquire multiple operating status parameters of the current vehicle and the real-time oil pressure data. The operating status parameters include vehicle speed, road slope, engine speed, and engine output torque. The threshold filtering module is used to filter out the lower limit threshold of oil pressure and the duration threshold that match any operating state parameter. The condition judgment module is used to determine that the operating status parameter meets the preset alarm condition if the real-time oil pressure acquisition value is less than the lower limit threshold of oil pressure and the duration of low oil pressure is greater than the duration threshold. The early warning trigger module is used to trigger a low oil pressure fault alarm when all of the multiple operating status parameters meet the corresponding preset alarm conditions.

9. A computer device, characterized in that, include: A memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the method of any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the method of any one of claims 1 to 7.

Images