Method and device for determining whether engine has fault or not and electronic equipment

Abstract

The invention provides a method and device for determining whether an engine has a fault or not and electronic equipment, and relates to the technical field of engines. The method comprises the steps that if the current working condition is a steady-state working condition, the current engine oil pressure of an engine is determined under the current working condition; whether the current engine oil pressure meets the preset pressure condition of the current working condition or not is judged; if the current engine oil pressure does not meet the preset pressure condition of the current working condition, information indicating that the engine has a fault is generated; if the current engine oil pressure meets the preset pressure condition of the current working condition, whether the engine oil temperature at the end of the current working condition meets the preset temperature condition of the current working condition or not is determined; and if the engine oil temperature meets the preset temperature condition of the current working condition, it is determined that the engine does not have faults. According to the method, whether the engine oil pressure and temperature meet the preset conditions corresponding to the working conditions or not can be judged according to different working conditions, and therefore whether the engine breaks down or not can be accurately recognized by adopting a narrow accurate parameter range.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of engines, and in particular to a method and device for determining whether an engine has a fault and an electronic device. BACKGROUND

[0002] Engine oil lubrication is an important guarantee for the normal operation of an engine. Current engine factory testing mainly determines whether the engine is normally lubricated by using rated operating condition engine oil pressure limits, but there are many problems.

[0003] Firstly, the engine oil pressure limit is often a relatively wide range, and it is difficult to identify a fault through the range. Secondly, the engine cannot be guaranteed to run to the condition where the fault can be identified during factory testing, resulting in missed detection. For example, when the engine oil temperature needs to be raised to 95 DEG C, the engine oil pressure can trigger the lower limit, but the engine oil temperature is only 85 DEG C when the test is recorded, at which time the engine oil pressure is slightly higher than the limit, and the engine is identified as a qualified product, resulting in missed detection. SUMMARY

[0004] Therefore, the purpose of the present disclosure is to provide a method and device for determining whether an engine has a fault, which can solve the existing problems.

[0005] To achieve the above purpose, in a first aspect, the present disclosure provides a method for determining whether an engine has a fault, comprising: if a current operating condition is a steady-state operating condition, determining the current engine oil pressure under the current operating condition; determining whether the current engine oil pressure meets a preset pressure condition of the current operating condition; if the current engine oil pressure does not meet the preset pressure condition of the current operating condition, generating information indicating that the engine has a fault; if the current engine oil pressure meets the preset pressure condition of the current operating condition, determining whether the engine oil temperature at the end of the current operating condition meets a preset temperature condition of the current operating condition; and if the engine oil temperature meets the preset temperature condition of the current operating condition, determining that the engine does not have a fault.

[0006] In a second aspect, the present disclosure also provides a device for determining whether an engine has a fault, comprising: a pressure determination unit configured to determine the current engine oil pressure under the current operating condition if the current operating condition is a steady-state operating condition; a determination unit configured to determine whether the current engine oil pressure meets a preset pressure condition of the current operating condition; a generation unit configured to generate information indicating that the engine has a fault if the current engine oil pressure does not meet the preset pressure condition of the current operating condition; a condition determination unit configured to determine whether the engine oil temperature at the end of the current operating condition meets a preset temperature condition of the current operating condition if the current engine oil pressure meets the preset pressure condition of the current operating condition; and a fault determination unit configured to determine that the engine does not have a fault if the engine oil temperature meets the preset temperature condition of the current operating condition.

[0007] In a third aspect, an electronic device is provided, including a memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the computer program to implement the method of the first aspect.

[0008] In a fourth aspect, a computer readable storage medium is provided, having stored thereon a computer program, the computer program being executable by a processor to implement the method of any one of the first aspect.

[0009] In a fifth aspect, a computer program product is provided, including a computer program, the computer program being executable by a processor to implement the method of any one of the first aspect.

[0010] In general, the present disclosure has at least the following beneficial effects: for different working conditions, it can be determined whether the engine oil pressure and temperature meet the preset conditions corresponding to the working conditions, so that a narrow and accurate parameter range can be used to accurately identify whether the engine has failed. BRIEF DESCRIPTION OF DRAWINGS

[0011] In the drawings, like reference numerals refer to like elements throughout the various drawings. The drawings are not necessarily to scale, the emphasis instead being placed upon illustrating principles of the present disclosure. It should be understood that the drawings are merely depictions of some embodiments disclosed herein and should not be construed as limiting the scope of the present disclosure.

[0012] Figure 1 A flowchart of a method for determining whether an engine has failed is shown according to an embodiment of the present disclosure; Figure 2 A schematic diagram of the relationship between engine oil temperature and determined engine oil pressure is shown according to an embodiment of the present disclosure; Figure 3 Another flowchart of a method for determining whether an engine has failed is shown according to an embodiment of the present disclosure; Figure 4 A schematic diagram of a device for determining whether an engine has failed is shown according to an embodiment of the present disclosure; Figure 5 A schematic diagram of an electronic device according to an embodiment of the present disclosure is shown; Figure 6 A schematic diagram of a storage medium according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0013] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in this disclosure can be combined with each other. This disclosure will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This disclosure illustrates a method for determining whether an engine has a malfunction. In embodiments of this disclosure, the method includes: Step S101: If the current operating condition is a steady state, then determine the current oil pressure and temperature of the engine under the current operating condition.

[0016] Step S102: Determine whether the current oil pressure meets the preset pressure conditions for the current operating conditions.

[0017] Step S103: If the current oil pressure does not meet the preset pressure conditions for the current operating conditions, information indicating that the engine has a fault is generated.

[0018] Step S104: If the current oil pressure meets the preset pressure condition of the current operating condition, then determine whether the oil temperature at the end of the current operating condition meets the preset temperature condition of the current operating condition.

[0019] Step S105: If the oil temperature meets the preset temperature conditions of the current operating conditions, then it is determined that the engine has no fault.

[0020] The entity executing the method for determining whether an engine has a fault can be any entity. Under each steady-state operating condition, the engine speed remains constant. Therefore, the main influence on oil pressure is oil temperature, and the two are negatively correlated. This creates the condition for determining oil pressure through oil temperature.

[0021] like Figure 2 The diagram illustrates the relationship between engine oil temperature and the oil pressure determined using that temperature. Specifically, it shows the engine oil temperature and pressure data determined for the engine's main oil passage under stable operating conditions.

[0022] This disclosure can determine whether the oil pressure and temperature meet the preset conditions corresponding to different operating conditions, thereby using a narrower range of precise parameters to accurately identify whether the engine has malfunctioned.

[0023] In some optional implementations of any embodiment of this disclosure, the preset pressure condition of the current operating condition is the pressure limit range corresponding to the current operating condition; the step of determining whether the current oil pressure meets the preset pressure condition of the current operating condition includes: comparing the current oil pressure with the pressure limit range corresponding to the current operating condition; and determining whether the current oil pressure meets the preset pressure condition of the current operating condition based on the comparison result.

[0024] In these implementations, if the current oil pressure exceeds the pressure limit range, it is determined that the current oil pressure does not meet the preset pressure conditions for the current operating condition. If the current oil pressure is within the pressure limit range, it is determined that the current oil pressure meets the preset pressure conditions for the current operating condition.

[0025] Specifically, under the current operating conditions, the oil pressure is compared with the pressure limit range. If it exceeds the pressure limit range, an alarm is immediately triggered. If it does not exceed the limit, the limit requirements are met, and a temperature assessment is performed. The pressure limit range can include both the lower and upper limits of the oil pressure.

[0026] These methods can accurately determine whether an engine malfunction has occurred based on the oil pressure, according to pressure limits.

[0027] In some optional implementations of any embodiment of this disclosure, determining whether the oil temperature at the end of the current operating condition meets the preset temperature condition of the current operating condition includes: determining whether the oil temperature at the end of the current operating condition meets the preset temperature condition of the current operating condition based on the relationship between the oil temperature at the end of the current operating condition and the preset condition temperature, and the target temperature difference, wherein the target temperature difference is the difference between the oil temperature at the end of the current operating condition and the start of the current operating condition.

[0028] In these implementation methods, various approaches can be used to determine whether the oil temperature at the end of the current operating condition meets the preset temperature conditions based on the relationship between the oil temperature at the end of the current operating condition and the preset condition temperature, as well as the difference between the oil temperature and the target temperature. For example, the relationship between the oil temperature at the end of the current operating condition and the preset condition temperature, as well as the difference between the oil temperature and the target temperature, can all be input into a preset model, such as a neural network model, to obtain the result indicating whether the preset temperature conditions are met, as output by the preset model.

[0029] These methods can accurately determine whether an engine is malfunctioning based on its current instantaneous temperature and changes.

[0030] In some optional application scenarios of these implementation methods, determining whether the oil temperature at the end of the current operating condition meets the preset temperature condition based on the relationship between the oil temperature at the end of the current operating condition and the preset condition temperature, and the target temperature difference, includes: if the oil temperature at the end of the current operating condition is greater than or equal to the preset condition temperature, then the oil temperature is determined to meet the preset temperature condition of the current operating condition; if the oil temperature at the end of the current operating condition is less than the preset condition temperature, then the temperature difference is compared with the preset temperature difference; if the temperature difference is less than the preset temperature difference, then the temperature is determined to meet the preset temperature condition of the current operating condition.

[0031] In these implementations, the oil temperature at the end of the operating condition is compared with the conditional temperature value. If the oil temperature at the end is less than the preset conditional temperature, it is further determined whether the difference c between the oil temperature at the end and the oil temperature recorded at the beginning of the operating condition meets the algorithm call requirements. If it does, the oil pressure prediction algorithm is called.

[0032] To avoid excessive errors, the prediction model has certain requirements on the range of oil temperature. Small changes in oil temperature often do not lead to large changes in oil pressure, and small error disturbances in this case can cause prediction distortion. Therefore, before calling the algorithm to predict pressure, the oil temperature change must be monitored. A difference value c can be set to determine whether the change range is greater than c. If the difference is too small or the oil temperature reaches the condition temperature at the end, the algorithm does not need to be called.

[0033] These optional implementation methods can prioritize the rapid assessment of engine malfunctions based on oil temperature, and then, if that fails, make a more accurate assessment based on temperature changes under the operating conditions.

[0034] In some of these application scenarios, the method further includes: if the temperature difference is greater than or equal to a preset temperature difference, then using an oil pressure prediction algorithm to process the preset temperature conditions of the current operating condition in order to predict the current oil pressure; and determining whether the engine has a fault based on the predicted oil pressure.

[0035] These situations can be addressed using an oil pressure prediction algorithm as a callable algorithm, thereby comprehensively analyzing engine faults by utilizing both oil pressure and oil temperature.

[0036] Optionally, the oil pressure prediction algorithm is an objective function; the generation steps of the oil pressure prediction algorithm include: performing linear fitting on the latest determined oil pressure and oil temperature to obtain the objective function.

[0037] Specifically, from the start of recording to the end of the working condition, the recorded oil pressure and oil temperature are acquired at regular time intervals (e.g., 1 second). The oil pressure and oil temperature are linearly fitted using the least squares method. The conditional temperature is substituted into the fitted oil pressure prediction algorithm to obtain the predicted oil pressure value, and the predicted value is compared with the pressure limit range.

[0038] For example, the oil pressure and oil temperature records are as follows: Oil pressure: y1, y2...y n .

[0039] Oil temperature: x1, x2...x n .

[0040] A linear fit was performed on the oil pressure and oil temperature, with the fitting function being y=ax+b. The x values ​​for all data points were then calculated. i and y i Average value: , The slope 'a' is determined by the ratio of the covariance to the variance: , The intercept b is solved by substituting the average value into the equation of the line y = ax + b: , The obtained function is used as an oil pressure prediction algorithm. Substituting the preset temperature K into x, the oil pressure is predicted. .

[0041] The pressure value (P) is compared with the pressure limit range; an alarm is triggered if the value is exceeded.

[0042] These optional implementations can use the latest determined oil pressure and oil temperature to generate an oil pressure prediction algorithm in real time, thereby ensuring the accuracy of fault diagnosis.

[0043] Optionally, determining whether the engine has a fault based on the predicted oil pressure includes: comparing the predicted oil pressure with the pressure limit range corresponding to the current operating condition; and determining whether the current oil pressure meets the preset pressure conditions of the current operating condition based on the comparison result, so as to determine whether the engine has a fault.

[0044] Optionally, the method further includes setting pressure limit ranges and preset condition temperatures for steady-state operating conditions corresponding to different rotational speeds.

[0045] Specifically, the preset conditional temperature is usually the maximum temperature that can generally be achieved under the current operating conditions, that is, the difference from the maximum temperature is small. Alternatively, the conditional temperature is the upper limit of the temperature at which the oil pressure reaches the limit.

[0046] This disclosure covers common operating ranges by setting parameters under different working conditions. At the same time, by setting the conditional temperature and predicting the oil pressure, it achieves consistency between the oil pressure and the monitored temperature, thus avoiding missed detections.

[0047] For example, parameters can be set as shown in Table 1: Table 1

[0048] Figure 3 A method for determining whether an engine has a fault is shown according to an embodiment of this disclosure. For example... Figure 3 As shown, the method for determining whether the engine has a fault includes: starting engine testing, setting oil pressure limits and conditional temperature for typical steady-state operating conditions. Determining if the oil pressure exceeds the pressure limit range. If yes, issuing an oil pressure fault alarm. If no, continuously recording oil pressure and oil temperature. At the end of the operating condition, determining if the oil temperature and temperature difference meet the requirements. If yes, invoking the oil pressure prediction algorithm; otherwise, the engine is taken offline normally. If yes, invoking the oil pressure prediction algorithm again. Determining if the predicted oil value obtained by the algorithm exceeds the pressure limit range. If yes, issuing an oil pressure fault alarm, running the engine to the conditional temperature, and determining if it exceeds the pressure limit range; if yes, issuing an oil pressure fault alarm. If no, the engine is taken offline normally.

[0049] This disclosure provides an apparatus for determining whether an engine has a fault. This apparatus is used to execute the engine fault determination method described in the above embodiments, such as... Figure 4 As shown, the device includes: a pressure determination unit 401, configured to determine the current oil pressure of the engine under the current operating condition if the current operating condition is a steady-state operating condition; a judgment unit 402, configured to determine whether the current oil pressure meets a preset pressure condition for the current operating condition; a generation unit 403, configured to generate information indicating that the engine has a fault if the current oil pressure does not meet the preset pressure condition for the current operating condition; a condition determination unit 404, configured to determine whether the oil temperature at the end of the current operating condition meets a preset temperature condition for the current operating condition if the current oil pressure meets the preset pressure condition for the current operating condition; and a fault determination unit 405, configured to determine that the engine does not have a fault if the oil temperature meets the preset temperature condition for the current operating condition.

[0050] The engine fault determination device and the engine fault determination method provided in the above embodiments of this disclosure are based on the same inventive concept and have the same beneficial effects as the methods used, run or implemented by the applications stored therein.

[0051] This disclosure also provides an electronic device corresponding to the engine fault determination method provided in the foregoing embodiments, for executing the engine fault determination method described above. This disclosure is not limiting.

[0052] Please refer to Figure 5 This illustrates a schematic diagram of an electronic device provided by some embodiments of the present disclosure. For example... Figure 5 As shown, the electronic device 50 includes: a processor 500, a memory 501, a bus 502, and a communication interface 503. The processor 500, the communication interface 503, and the memory 501 are connected via the bus 502. The memory 501 stores a computer program that can run on the processor 500. When the processor 500 runs the computer program, it executes the method provided in any of the foregoing embodiments of this disclosure.

[0053] The memory 501 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 503 (which can be wired or wireless), such as the Internet, wide area network, local area network, or metropolitan area network.

[0054] Bus 502 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. Memory 501 is used to store programs. After receiving an execution instruction, processor 500 executes the program. The method for determining whether an engine has a fault, disclosed in any of the foregoing embodiments of this disclosure, can be applied to processor 500, or implemented by processor 500.

[0055] The processor 500 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 500 or by instructions in software form. The processor 500 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 disclosure. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this disclosure 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 501. The processor 500 reads the information in memory 501 and, in conjunction with its hardware, completes the steps of the above method.

[0056] The electronic device provided in this disclosure and the method for determining whether an engine has a fault provided in this disclosure are based on the same inventive concept and have the same beneficial effects as the methods they employ, operate, or implement.

[0057] This disclosure also provides a computer-readable storage medium corresponding to the method for determining whether an engine has a fault as provided in the foregoing embodiments. Please refer to... Figure 6 The computer-readable storage medium shown is an optical disc 60, on which a computer program (i.e., a program product) is stored. When the computer program is run by a processor, it executes the method for determining whether an engine has a fault, as provided in any of the foregoing embodiments.

[0058] 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.

[0059] The computer-readable storage medium provided in the above embodiments of this disclosure and the method for determining whether an engine has a fault provided in the embodiments of this disclosure 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.

[0060] It should be noted that: In the foregoing text, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in this disclosure is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0061] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0062] The embodiments of this disclosure have been described above with reference to the accompanying drawings. These are merely specific implementations of this disclosure, but this disclosure is not limited to the specific implementations described above. The specific implementations described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this disclosure without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this disclosure.

Claims

1. A method for determining whether an engine has a fault, characterized in that, include: If the current operating condition is a steady state, then determine the current oil pressure of the engine under the current operating condition; Determine whether the current oil pressure meets the preset pressure conditions for the current operating conditions; If the current oil pressure does not meet the preset pressure conditions for the current operating conditions, information indicating that the engine has a fault is generated. If the current oil pressure meets the preset pressure condition for the current operating condition, then determine whether the oil temperature at the end of the current operating condition meets the preset temperature condition for the current operating condition. If the engine oil temperature meets the preset temperature conditions for the current operating conditions, then it is determined that the engine is not faulty.

2. The method according to claim 1, characterized in that, The preset pressure condition for the current operating condition is the pressure limit range corresponding to the current operating condition; The determination of whether the current oil pressure meets the preset pressure conditions for the current operating conditions includes: Compare the current oil pressure with the pressure limit range corresponding to the current operating condition; Based on the comparison results, determine whether the current oil pressure meets the preset pressure conditions for the current operating conditions.

3. The method according to claim 1, characterized in that, Determining whether the oil temperature at the end of the current operating condition meets the preset temperature conditions of the current operating condition includes: Based on the relationship between the oil temperature at the end of the current operating condition and the preset condition temperature, and the target temperature difference, it is determined whether the oil temperature at the end of the current operating condition meets the preset temperature condition of the current operating condition. The target temperature difference is the difference between the oil temperature at the end of the current operating condition and the start of the current operating condition.

4. The method according to claim 3, characterized in that, The step of determining whether the oil temperature at the end of the current operating condition meets the preset temperature condition based on the relationship between the oil temperature at the end of the current operating condition and the preset condition temperature, and the difference between the oil temperature and the target temperature, includes: If the oil temperature at the end of the current operating condition is greater than or equal to the preset condition temperature, then the oil temperature is determined to meet the preset temperature condition of the current operating condition. If the oil temperature at the end of the current operating condition is lower than the preset condition temperature, then the temperature difference is compared with the preset temperature difference; if the temperature difference is less than the preset temperature difference, then the temperature is determined to meet the preset temperature condition of the current operating condition.

5. The method according to claim 4, characterized in that, The method further includes: If the temperature difference is greater than or equal to the preset temperature difference, the oil pressure prediction algorithm is used to process the preset temperature conditions of the current operating condition in order to predict the current oil pressure. Based on the predicted oil pressure, determine whether the engine has a malfunction.

6. The method according to claim 5, characterized in that, The oil pressure prediction algorithm is an objective function; the steps for generating the oil pressure prediction algorithm include: The objective function is obtained by performing a linear fit on the newly determined oil pressure and oil temperature.

7. The method according to claim 5, characterized in that, The step of determining whether the engine has a fault based on the predicted oil pressure includes: The predicted oil pressure is compared with the pressure limit range corresponding to the current operating condition; Based on the comparison results, it is determined whether the current oil pressure meets the preset pressure conditions for the current operating conditions, in order to determine whether the engine has a malfunction.

8. The method according to claim 1, characterized in that, The method further includes: For steady-state operating conditions corresponding to different rotational speeds, pressure limit ranges and preset condition temperatures are set respectively.

9. A device for determining whether an engine has a fault, characterized in that, include: The pressure determination unit is configured to determine the current oil pressure of the engine under the current operating condition if the current operating condition is a steady-state condition. The judgment unit is configured to determine whether the current oil pressure meets the preset pressure conditions of the current operating conditions; The generation unit is configured to generate information indicating that the engine has a fault if the current oil pressure does not meet the preset pressure conditions of the current operating conditions. The condition determination unit is configured to determine whether the oil temperature at the end of the current operating condition meets the preset temperature condition if the current oil pressure meets the preset pressure condition of the current operating condition. The fault determination unit is configured to determine that the engine has no fault if the oil temperature meets the preset temperature conditions of the current operating conditions.

10. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, The processor executes the computer program to implement the method as described in any one of claims 1-8.

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