Fault positioning method for engine starting failure, electronic equipment and storage medium

Abstract

The invention discloses an engine starting failure fault positioning method, electronic equipment and a storage medium, and relates to the technical field of engine starting, and the method comprises a starting abnormity initial detection stage, a fault identification stage, a processing and alarm stage and a prevention self-detection stage; the fault recognition stage comprises the steps that a fault cylinder is determined according to the size relation between the actual pressure value in each air cylinder and a preset pressure value; and judging whether the current fault is a valve timing fault or not according to the abnormal noise signal of the fault cylinder. By setting a starting abnormity initial detection stage, a fault identification stage, a processing and alarming stage and a prevention self-detection stage, faults in an engine cylinder can be accurately judged. Meanwhile, the fault cylinder is determined according to the size relation between the actual pressure value in each cylinder and the preset pressure value, whether the current fault is the valve timing fault or not is judged according to the abnormal noise signal of the fault cylinder, whether the valve timing fault exists in the cylinder or not can be further accurately judged, and the judgment accuracy is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engine starting, and particularly to a method for fault location of engine starting failure, an electronic device, and a storage medium. Background Art

[0002] The existing fault diagnosis of starting failure mainly diagnoses the starter, fuel, etc., and there is no diagnosis for the misalignment of the valve timing cam phase of a large-bore engine, especially the misalignment of the single-cylinder camshaft resulting in starting failure.

[0003] When the engine configuration only has a segmented valve timing camshaft for driving the valves, since the camshaft needs to assemble each segment, it is very difficult to find out if the phase is installed incorrectly. Especially when one segment is installed incorrectly, when starting failure occurs during the starting process, it can only be checked one by one manually according to experience, and it is very difficult to locate the fault. Summary of the Invention

[0004] The present application provides a method for fault location of engine starting failure, an electronic device, and a storage medium, so as to solve at least one technical problem existing in the related art.

[0005] According to one aspect of the embodiments of the present application, a method for fault location of engine starting failure is provided, including: an initial abnormal starting inspection stage, a fault identification stage, a processing and alarm stage, and a preventive self-inspection stage; the fault identification stage includes: determining a faulty cylinder according to the magnitude relationship between the actual pressure value and the preset pressure value in each cylinder; judging whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder.

[0006] As an optional implementation manner, the determining a faulty cylinder according to the magnitude relationship between the actual pressure value and the preset pressure value in each cylinder includes: calculating the difference between the actual pressure value in each cylinder and the preset pressure value; marking the cylinder with the difference between the actual pressure value and the preset pressure value greater than a preset ratio of the preset pressure value as the faulty cylinder.

[0007] As an optional implementation manner, the judging whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder includes: performing low-frequency filtering on the abnormal noise signal of the faulty cylinder; judging whether the frequency of the filtered abnormal noise signal is consistent with the engine speed frequency; if the frequency of the filtered abnormal noise signal is consistent with the engine speed frequency, then judging that the faulty cylinder has a valve timing fault.

[0008] As an optional implementation manner, the initial abnormal starting inspection stage includes: if the engine fails to start three times continuously, obtaining the actual pressure value and the abnormal noise signal in each cylinder, and automatically entering the fault identification stage.

[0009] As an alternative implementation, obtaining the actual pressure values and abnormal noise signals in each cylinder includes: obtaining the actual pressure values and abnormal noise signals in each cylinder at the engine drag speed, where the engine drag speed is less than the engine ignition speed.

[0010] As an alternative implementation, the preventive self-check phase includes: performing a drag detection for a preset duration after the vehicle is turned off, and determining whether there is a fault in each cylinder according to the actual pressure value in each cylinder.

[0011] As an alternative implementation, determining whether there is an airtightness fault in the engine according to the actual pressure values in each cylinder includes: obtaining the actual pressure values in each cylinder multiple times within the preset duration; comparing the multiple actual pressure values in each cylinder with the pressure baseline data of each cylinder; and determining whether there is a fault in each cylinder according to the comparison results between the multiple actual pressure values in each cylinder and the pressure baseline data of each cylinder.

[0012] As an alternative implementation, the processing and alarm phase includes: if the current fault is the valve timing fault, cutting off the fuel supply to the faulty cylinder, adjusting the ignition sequence to skip the faulty cylinder; and the instrument panel outputting a signal for characterizing the valve timing fault.

[0013] According to another aspect of the present application, there is provided an electronic device, including a processor, a communication interface, a memory, and a communication bus. Among them, the processor, the communication interface, and the memory complete communication with each other through the communication bus. It is characterized in that the memory is used for storing a computer program; the processor is used for executing the steps of the fault location method for engine starting failure by running the computer program stored on the memory.

[0014] According to yet another aspect of the present application, there is provided a computer-readable storage medium, in which a computer program is stored. Among them, the computer program is set to execute the steps of the fault location method for engine starting failure when running.

[0015] In an embodiment of the present application, a fault location method, an electronic device, and a storage medium for engine starting failure are provided, including: an initial abnormal start inspection stage, a fault identification stage, a processing and alarm stage, and a preventive self-inspection stage; the fault identification stage includes: determining a faulty cylinder according to the magnitude relationship between the actual pressure value and the preset pressure value in each cylinder; and judging whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder. By setting the initial abnormal start inspection stage, the fault identification stage, the processing and alarm stage, and the preventive self-inspection stage, the in-cylinder faults of the engine can be accurately judged. At the same time, the fault identification stage includes determining the faulty cylinder according to the magnitude relationship between the actual pressure value and the preset pressure value in each cylinder and judging whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder, which can further accurately judge whether there is a valve timing fault in the cylinder and improve the judgment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present invention and used together with the specification to explain the principles of the present invention.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a schematic flowchart of a fault location method for engine starting failure provided according to an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to enable those skilled in the art to better understand the solutions of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0020] It should be noted that the terms "first", "second", etc. in the description, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application described here can be implemented in an order other than those illustrated or described here. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0021] As Figure 1 shown, according to one aspect of the embodiments of the present application, a method for fault location of engine starting failure is provided, including: an initial abnormal start inspection stage, a fault identification stage, a processing and alarm stage, and a preventive self-inspection stage; the fault identification stage includes:

[0022] S1 Determine the faulty cylinder according to the magnitude relationship between the actual pressure value and the preset pressure value in each cylinder;

[0023] S2 Determine whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder.

[0024] By setting the initial abnormal start inspection stage, the fault identification stage, the processing and alarm stage, and the preventive self-inspection stage, the faults in the engine cylinder can be accurately judged. At the same time, the fault identification stage includes determining the faulty cylinder according to the magnitude relationship between the actual pressure value and the preset pressure value in each cylinder and determining whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder, which can further accurately judge whether there is a valve timing fault in the cylinder and improve the judgment accuracy.

[0025] Among them, the preset pressure value can be set to the pressure when the engine starts normally under the preset working condition, such as the normal pressure of the cylinder at a certain engine speed; in addition, a detonation pressure sensor can be set to obtain the pressure value.

[0026] Exemplarily, when there is a deviation in the engine valve timing, there may be the following situations: the valve opens during the compression stroke, and the cylinder pressure will be lower than the calibrated value at this time. The valve opens during the power stroke, and the cylinder pressure will be lower than the calibrated value at this time. The valve closes during the exhaust stroke, and the cylinder pressure will increase at this time, but it is still lower than the calibrated value, and the cylinder pressure curve that should be the pressure drop end may become the rising end. The valve closes during the intake stroke, and the cylinder pressure is lower than the calibrated value at this time.

[0027] As an alternative implementation manner, determining the faulty cylinder according to the magnitude relationship between the actual pressure value and the preset pressure value in each cylinder includes: calculating the difference between the actual pressure value in each cylinder and the preset pressure value; marking the cylinder whose difference between the actual pressure value and the preset pressure value is greater than a preset ratio of the preset pressure value as the faulty cylinder.

[0028] Specifically, the preset ratio can be 5%-15%, which can be specifically selected according to actual requirements. By comparing the difference between the actual pressure value in each cylinder and the preset pressure value, the accuracy of fault location can be further improved.

[0029] As an alternative implementation manner, determining whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder includes: performing low-frequency filtering on the abnormal noise signal of the faulty cylinder; judging whether the frequency of the filtered abnormal noise signal is consistent with the engine speed frequency; if the frequency of the filtered abnormal noise signal is consistent with the engine speed frequency, then judging that the faulty cylinder has a valve timing fault.

[0030] As an alternative implementation manner, the initial inspection stage of abnormal starting includes: if the engine fails to start three times continuously, obtaining the actual pressure value and the abnormal noise signal in each cylinder, and automatically entering the fault identification stage.

[0031] As an alternative implementation manner, obtaining the actual pressure value and the abnormal noise signal in each cylinder includes: obtaining the actual pressure value and the abnormal noise signal in each cylinder at the engine dragging speed, and the engine dragging speed is less than the engine ignition speed.

[0032] As an alternative implementation manner, the preventive self-inspection stage includes: performing a dragging detection for a preset duration after the vehicle shuts off, and judging whether there is a fault in each cylinder according to the actual pressure value in each cylinder.

[0033] As an alternative implementation manner, judging whether there is a fault in each cylinder according to the actual pressure value in each cylinder includes: obtaining the actual pressure value in each cylinder multiple times within the preset duration; comparing the multiple actual pressure values in each cylinder with the pressure baseline data of each cylinder; judging whether there is a fault in each cylinder according to the comparison result between the multiple actual pressure values in each cylinder and the pressure baseline data of each cylinder.

[0034] Similarly, drag detection can be automatically performed within 5 - 10 seconds after each engine shutdown, comparing the actual pressure value with the pressure baseline data of each cylinder. In addition, the faulty cylinder can be determined based on the relationship between the actual pressure value in each cylinder and the preset pressure value: calculate the difference between the actual pressure value in each cylinder and the preset pressure value; mark the cylinder whose difference between the actual pressure value and the preset pressure value is greater than a preset ratio of the preset pressure value as the faulty cylinder.

[0035] As an optional implementation manner, the processing and alarm stage includes: if the current fault is the valve timing fault, cut off the fuel supply to the faulty cylinder, adjust the ignition sequence to skip the faulty cylinder; the instrument panel outputs a signal for characterizing the valve timing fault.

[0036] Exemplarily, for the air leakage fault: turn on the yellow warning light on the instrument panel, and the display screen prompts "Abnormal seal of cylinder No. X"; for the phase error: activate the red warning light, and the buzzer emits a rapid alarm sound at intervals of 0.5 seconds, and execute safety measures: automatically cut off the fuel supply to the faulty cylinder, and adjust the ignition sequence to skip the faulty cylinder.

[0037] According to another aspect of the present application, there is provided a fault location system for engine starting failure, including: a faulty cylinder determination module for determining the faulty cylinder according to the relationship between the actual pressure value in each cylinder and the preset pressure value; a fault judgment module for judging whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder.

[0038] According to another aspect of the present application, there is provided an electronic device, including a processor, a communication interface, a memory, and a communication bus. Among them, the processor, the communication interface, and the memory complete mutual communication through the communication bus. The characteristic is that the memory is used to store a computer program; the processor is used to execute the steps of the fault location method for engine starting failure by running the computer program stored on the memory.

[0039] According to still another aspect of the present application, there is provided a computer-readable storage medium, in which a computer program is stored. Among them, the computer program is set to execute the steps of the fault location method for engine starting failure when running.

[0040] Those of ordinary skill in the art can understand that the device for implementing the above-mentioned fault location method for engine starting failure can be a terminal device, and this terminal device can be a smart phone (such as an Android phone, an IOS phone, etc.), a tablet computer, a handheld computer, and a mobile Internet device (Mobile Internet Devices, MID), a PAD and other terminal devices. The present application does not limit the structure of the above-mentioned electronic device.

[0041] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by instructing the relevant hardware of the terminal device through a program. This program can be stored in a computer-readable storage medium, and the storage medium can include: a flash drive, ROM, RAM, a magnetic disk, or an optical disc, etc.

[0042] The serial numbers of the above embodiments of the present application are only for description and do not represent the advantages or disadvantages of the embodiments.

[0043] If the integrated unit in the above embodiments is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in the above computer-readable storage medium. Based on such an understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or all or part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing one or more electronic devices (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.

[0044] In the above embodiments of the present application, the descriptions of the various embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0045] In the several embodiments provided by the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed couplings or direct couplings or communication connections to each other can be through some interfaces. The indirect couplings or communication connections of the units or modules can be in an electrical or other form.

[0046] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place or distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution provided in this embodiment.

[0047] In addition, in each embodiment of the present application, the functional units can be integrated in a processing unit, or each unit can exist physically alone, or two or more units can be integrated in one unit. The above integrated units can be implemented in the form of hardware or in the form of software functional units.

[0048] In the above-mentioned embodiments of the present application, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0049] The above are only the preferred embodiments of the present application. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A method for locating a fault of an engine starting failure, characterized in that: include: Initial inspection stage for abnormal starting, fault identification stage, processing and alarm stage, and preventive self-inspection stage; The fault identification stage includes: Determine the faulty cylinder based on the relationship between the actual pressure value in each cylinder and the preset pressure value; It is determined whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder.

2. The method for locating the fault of the engine starting failure according to claim 1, characterized in that: Determining the faulty cylinder according to the magnitude relationship between the actual pressure value in each cylinder and the preset pressure value comprises: Calculate the difference between the actual pressure value in each cylinder and the preset pressure value; A cylinder whose actual pressure value differs from the preset pressure value by a value greater than a preset ratio of the preset pressure value is marked as a faulty cylinder.

3. The method for locating the fault of the engine starting failure according to claim 1, characterized in that: The step of judging whether the current fault is a valve timing fault according to the abnormal noise signal of the faulty cylinder comprises: Performing low-frequency filtering on the abnormal noise signal of the faulty cylinder; Determining whether the frequency of the abnormal noise signal after filtering is consistent with the engine speed frequency; If the frequency of the abnormal noise signal after filtering is consistent with the engine speed frequency, it is determined that the faulty cylinder is a valve timing fault.

4. The method for locating the fault of the engine starting failure according to claim 1, characterized in that: The initial inspection stage of abnormal startup includes: If the engine fails to start three times in a row, the actual pressure value and abnormal noise signal in each cylinder are obtained, and the fault identification stage is automatically entered.

5. The method for locating the fault of the engine starting failure according to claim 4, characterized in that: The obtaining of the actual pressure value and the abnormal noise signal in each cylinder comprises: The actual pressure value and abnormal noise signal in each cylinder at the engine drag speed are obtained, and the engine drag speed is less than the engine ignition speed.

6. The method for locating the fault of engine starting failure according to claim 1, characterized in that: The preventive self-checking stage includes: After the vehicle is turned off, a towing test of a preset duration is performed to determine whether each cylinder has a fault based on the actual pressure value in each cylinder.

7. The method for locating the fault of the engine starting failure according to claim 6, characterized in that: The determining whether each cylinder has a fault according to the actual pressure value in each cylinder includes: Acquiring the actual pressure value in each cylinder multiple times within the preset time period; comparing a plurality of actual pressure values ​​in each cylinder with pressure baseline data of each cylinder; It is determined whether each cylinder has a fault based on the comparison result of the multiple actual pressure values ​​in each cylinder with the pressure baseline data of each cylinder.

8. The method for locating the fault of an engine starting failure according to claim 1, characterized in that: The processing and alarming stage includes: If the current fault is the valve timing fault, the fuel supply to the faulty cylinder is cut off, and the ignition sequence is adjusted to skip the faulty cylinder; The instrument panel outputs a signal to indicate a valve timing fault.

9. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein: The processor, the communication interface and the memory communicate with each other via the communication bus, wherein: The memory is used to store computer programs; The processor is used to execute the steps of the engine start failure fault locating method according to any one of claims 1 to 7 by running the computer program stored in the memory.

10. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the steps of the method for locating a fault of an engine starting failure according to any one of claims 1 to 7 when running.

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