Fault positioning method for engine start failure, electronic device and storage medium

Abstract

The application discloses an engine starting failure fault positioning method, an electronic device and a storage medium, relates to the technical field of engine starting, and comprises a starting abnormality preliminary inspection stage, a fault identification stage, a processing and alarm stage and a prevention self-checking stage.The fault identification stage comprises the following steps: determining a fault cylinder according to the size relationship between actual pressure values in each cylinder and preset pressure values; and judging whether the current fault is a valve timing fault according to an abnormal noise signal of the fault cylinder.Through the setting of the starting abnormality preliminary inspection stage, the fault identification stage, the processing and alarm stage and the prevention self-checking stage, the engine cylinder fault can be accurately judged.Meanwhile, the fault cylinder can be determined according to the size relationship between the actual pressure values in each cylinder and the preset pressure values, and whether the current fault is the valve timing fault can be judged according to the abnormal noise signal of the fault cylinder, so that the valve timing fault in the cylinder can be further accurately judged, and the judgment accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine starting, in particular to an engine starting failure fault positioning method, an electronic device and a storage medium. BACKGROUND

[0002] The existing starting failure fault diagnosis mainly diagnoses the starter, fuel and other parts, and does not diagnose the starting failure caused by the phase error of the camshaft of the large-bore engine, especially the phase error of the single-cylinder camshaft.

[0003] When the engine is configured with a segmented camshaft that only drives the valve, the camshaft needs to be assembled from each segment, and it is difficult to find the phase error, especially when a segment is installed incorrectly. When the starting failure problem occurs during the starting process, it is difficult to locate the fault by manually checking each segment according to experience. SUMMARY

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

[0005] According to one aspect of an embodiment of the present application, an engine starting failure fault positioning method is provided, comprising: a starting abnormality preliminary inspection stage, a fault identification stage, a processing and alarm stage, and a prevention self-inspection stage; the fault identification stage comprises: determining a fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value; and determining whether the current fault is a valve timing fault according to the abnormal noise signal of the fault cylinder.

[0006] As an optional implementation, the determination of the fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value comprises: performing difference calculation on the actual pressure value in each cylinder and the preset pressure value; and marking the cylinder whose difference between the actual pressure value and the preset pressure value is greater than a preset proportion of the preset pressure value as the fault cylinder.

[0007] As an optional implementation, the determination of whether the current fault is a valve timing fault according to the abnormal noise signal of the fault cylinder comprises: performing low-frequency filtering on the abnormal noise signal of the fault cylinder; determining whether the frequency of the filtered abnormal noise signal is consistent with the engine speed frequency; and if the frequency of the filtered abnormal noise signal is consistent with the engine speed frequency, determining that the fault cylinder is a valve timing fault.

[0008] As an optional implementation, the starting abnormality preliminary inspection stage comprises: if the engine fails to start for three times in succession, acquiring the actual pressure value in each cylinder and the abnormal noise signal, and automatically entering the fault identification stage.

[0009] As an optional implementation, the acquiring the actual pressure value and the abnormal noise signal in each cylinder comprises: acquiring the actual pressure value and the abnormal noise signal in each cylinder at an engine drag speed, the engine drag speed being less than an engine ignition speed.

[0010] As an optional implementation, the self-checking stage comprises: performing a drag detection for a preset time period after the vehicle is turned off, and determining whether each cylinder has a fault according to the actual pressure value in each cylinder.

[0011] As an optional implementation, the determining whether the engine has an air tightness fault according to the actual pressure value in each cylinder comprises: acquiring the actual pressure value in each cylinder multiple times within the preset time period; comparing the multiple actual pressure values in each cylinder with pressure baseline data of each cylinder; and determining whether each cylinder has a fault according to a comparison result of the multiple actual pressure values in each cylinder and the pressure baseline data of each cylinder.

[0012] As an optional implementation, the processing and alarming stage comprises: if the current fault is the valve timing fault, cutting off fuel supply of the fault cylinder, adjusting the ignition sequence to skip the fault cylinder, and outputting a signal for representing the valve timing fault on an instrument panel.

[0013] According to another aspect of the present application, an electronic device is provided, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete communication with each other through the communication bus, characterized in that the memory is configured to store a computer program; and the processor is configured to execute the steps of the engine start failure fault positioning method by running the computer program stored in the memory.

[0014] According to still another aspect of the present application, a computer readable storage medium is provided, and the storage medium stores a computer program, wherein the computer program is configured to execute the steps of the engine start failure fault positioning method when running.

[0015] In the embodiment of the present application, the engine starting failure fault positioning method, the electronic device and the storage medium are provided, comprising: a starting abnormality preliminary inspection stage, a fault identification stage, a processing and alarm stage and a preventive self-checking stage; the fault identification stage comprises: determining a fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value; and determining whether the current fault is a valve timing fault according to the abnormal noise signal of the fault cylinder. By setting the starting abnormality preliminary inspection stage, the fault identification stage, the processing and alarm stage and the preventive self-checking stage, the engine cylinder fault can be accurately determined. At the same time, the fault identification stage comprises determining a fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value, and determining whether the current fault is a valve timing fault according to the abnormal noise signal of the fault cylinder, which can further accurately determine whether there is a valve timing fault in the cylinder and improve the determination accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings required to be used in the embodiments or the prior art description will be briefly introduced as follows, and obviously, other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0018] Figure 1 FIG. 1 is a flow diagram of an engine starting failure fault positioning method according to an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0020] It is to be understood that the terms "first", "second", and the like, used in the description and the claims of the present application as well as the above description of the drawings merely refer to structure which is different, and not necessarily to a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in other sequences than those explicitly described or otherwise specifically referred to herein. Moreover, the terms "include", "have", and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, product or apparatus that comprises a list of steps or units are not necessarily limited to those steps or units specifically listed, but can include additional steps or units not expressly listed or inherent to such process, method, product or apparatus.

[0021] As Figure 1 shown, according to one aspect of the embodiments of the present application, a method for fault positioning of engine starting failure is provided, comprising: a starting abnormality preliminary inspection stage, a fault identification stage, a processing and alarm stage, and a preventive self-inspection stage; the fault identification stage comprises:

[0022] S1 determining a fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value;

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

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

[0025] The preset pressure value can be set as the pressure when the engine starts normally under a preset working condition, for example, the normal pressure of the cylinder under a certain engine speed; in addition, a burst pressure sensor can be provided to obtain the pressure value.

[0026] For example, when the engine valve timing phase deviates, there can be several cases: the compression stroke valve is opened, at this time the cylinder pressure will be lower than the calibration value. The working stroke valve is opened, at this time the cylinder pressure will be lower than the calibration value. The exhaust stroke valve is closed, at this time the cylinder pressure will rise, but will still be lower than the calibration value, and the cylinder pressure curve should be a pressure drop end, which may become an ascending end. The intake stroke valve is closed, at this time the cylinder pressure is lower than the calibration value.

[0027] As an optional implementation, the determining the fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value comprises: calculating the difference between the actual pressure value in each cylinder and the preset pressure value; and marking the cylinder with a difference greater than a preset proportion of the preset pressure value as the fault cylinder.

[0028] Specifically, the preset proportion can be 5%-15%, which can be 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 positioning can be further improved.

[0029] As an optional implementation, the determining the fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value comprises: calculating the difference between the actual pressure value in each cylinder and the preset pressure value; and marking the cylinder with a difference greater than a preset proportion of the preset pressure value as the fault cylinder.

[0030] As an optional implementation, the starting abnormality preliminary detection stage comprises: if the engine fails to start for three times in succession, acquiring the actual pressure value in each cylinder and the abnormal noise signal, and automatically entering the fault identification stage.

[0031] As an optional implementation, the acquiring the actual pressure value in each cylinder and the abnormal noise signal comprises: acquiring the actual pressure value in each cylinder and the abnormal noise signal at an engine drag speed, wherein the engine drag speed is less than an engine ignition speed.

[0032] As an optional implementation, the prevention self-detection stage comprises: performing a drag detection for a preset time length after the vehicle is turned off, and determining whether each cylinder has a fault according to the actual pressure value in each cylinder.

[0033] As an optional implementation, the determining whether each cylinder has a fault according to the actual pressure value in each cylinder comprises: acquiring the actual pressure value in each cylinder multiple times within the preset time length; comparing the multiple actual pressure values in each cylinder with pressure baseline data of each cylinder; and determining whether each cylinder has a fault according to the comparison result of the multiple actual pressure values in each cylinder and the pressure baseline data of each cylinder.

[0034] Similarly, the drag detection can be automatically performed within 5-10 seconds after each time of extinguishing, and the actual pressure value is compared with the pressure baseline data of each cylinder, and the fault cylinder can be determined according to the size relationship between the actual pressure value in each cylinder and the preset pressure value: the actual pressure value in each cylinder is subtracted from the preset pressure value; the cylinder whose difference between the actual pressure value and the preset pressure value is greater than a preset proportion of the preset pressure value is marked as the fault cylinder.

[0035] As an optional implementation, the processing and alarming stage comprises: if the current fault is the valve timing fault, cutting off the fuel supply of the fault cylinder, adjusting the ignition sequence to skip the fault cylinder; and the instrument panel outputs a signal for representing the valve timing fault.

[0036] For example, for the air leakage fault: turning on the yellow warning light of the instrument panel, and the display screen prompts "X cylinder sealing abnormality"; for the phase error: activating the red warning light, and the buzzer emits a sharp alarm sound with an interval of 0.5 seconds; and performing the safety measure: automatically cutting off the fuel supply of the fault cylinder, and adjusting the ignition sequence to skip the fault cylinder.

[0037] According to still another aspect of the present application, there is provided an engine start failure fault positioning system, comprising: a fault cylinder determination module, configured to determine the fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value; and a fault judgment module, configured to judge whether the current fault is the valve timing fault according to the abnormal noise signal of the fault cylinder.

[0038] According to another aspect of the present application, there is provided an electronic device, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete the communication among each other through the communication bus, characterized in that the memory is configured to store a computer program; and the processor is configured to execute the engine start failure fault positioning method steps by running the computer program stored in the memory.

[0039] According to still another aspect of the present application, there is provided a computer readable storage medium, wherein the storage medium stores a computer program, and the computer program is configured to execute the engine start failure fault positioning method steps when running.

[0040] Those skilled in the art can understand that the device for implementing the above engine start failure fault positioning method can be a terminal device, which can be a smart phone (such as an Android phone, an IOS phone, etc.), a tablet computer, a palm computer, a Mobile Internet Device (MID), a PAD, etc. The structure of the above electronic device is not limited in the present application.

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

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

[0043] The integrated units in the above embodiments, if realized in the form of software function units and sold or used as independent products, can be stored in the above computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the parts that make contributions to the prior art or all or part of the technical solutions can be embodied in the form of software products, and the computer software products are stored in storage media, including a plurality of instructions for causing one or more electronic devices (which can be personal computers, servers or network devices, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application.

[0044] In the above embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the related description 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 above-mentioned device embodiments are only schematic, for example, the division of the units is only a logical function division, and there can be another division way in actual implementation, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some interface, unit or module, and can be electrical or other forms.

[0046] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, that is, they can be located in one place or distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the scheme provided in the embodiments.

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

[0048] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0049] The above only describes the preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A method of fault location of engine start failure, characterized by, The method comprises: an initial examination stage of starting abnormality, a fault identification stage, a treatment and alarm stage, and a self-inspection stage of prevention; the fault identification stage comprises: determining a fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value; judging whether the current fault is a valve timing fault according to the abnormal noise signal of the fault cylinder; performing low-frequency filtering on the abnormal noise signal of the fault 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, it is judged that the fault cylinder is a valve timing fault.

2. The engine start failure fault location method according to claim 1, characterized by, The determination of the fault cylinder according to the size relationship between the actual pressure value in each cylinder and the preset pressure value comprises: performing difference calculation on 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 the preset proportion of the preset pressure value as the fault cylinder.

3. The engine start failure fault location method according to claim 1, characterized by, The initial examination stage of starting abnormality comprises: if the engine fails to start for three times in succession, the actual pressure value and the abnormal noise signal in each cylinder are acquired, and the fault identification stage is automatically entered.

4. The engine start failure fault location method according to claim 3, characterized by, The acquisition of the actual pressure value and the abnormal noise signal in each cylinder comprises: acquiring the actual pressure value and the abnormal noise signal in each cylinder at the engine drag speed, which is less than the engine ignition speed.

5. The engine start failure fault location method according to claim 1, characterized by, The self-inspection stage of prevention comprises: performing drag detection for a preset time duration after the vehicle is turned off, and judging whether each cylinder has a fault according to the actual pressure value in each cylinder.

6. The engine start failure fault location method according to claim 5, characterized by, The judgment of whether each cylinder has a fault according to the actual pressure value in each cylinder comprises: acquiring the actual pressure value in each cylinder multiple times within the preset time duration; comparing the multiple actual pressure values in each cylinder with the pressure baseline data of each cylinder; judging whether each cylinder has a fault according to the comparison result of the multiple actual pressure values in each cylinder and the pressure baseline data of each cylinder.

7. The engine start failure fault location method of claim 1, wherein The treatment and alarm stage comprises: if the current fault is the valve timing fault, cutting off the fuel supply of the fault cylinder, adjusting the ignition sequence to skip the fault cylinder; the instrument panel outputs a signal for representing the valve timing fault.

8. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein, The processor, the communication interface, and the memory complete communication with each other through the communication bus, and the method comprises: the memory is used for storing a computer program; the processor is used for executing the fault positioning method steps of the engine starting failure in any one of claims 1 to 7 by running the computer program stored on the memory.

9. A computer readable storage medium, characterized in that, The storage medium stores a computer program, and the computer program is set to execute the fault positioning method steps of the engine starting failure in any one of claims 1 to 7 when running.

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