Diagnostic method, device, electronic device and storage medium for hydrocarbon injection system

Abstract

The present invention provides a method, device, electronic device, and storage medium for diagnosing a hydrocarbon injection system, belonging to the field of engine technology. The method comprises: after the engine begins starting, acquiring fuel pressure data collected by a fuel pressure sensor and air pressure data collected by an air pressure sensor of the hydrocarbon injection system; determining that the fuel pressure sensor has failed if the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold; and determining that the air pressure sensor has failed if the air pressure data is less than the first pressure threshold or greater than the second pressure threshold. By collecting fuel pressure data and air pressure data, the present invention determines whether the fuel pressure sensor and the air pressure sensor have failed, thereby resolving the technical problem that existing diagnostic solutions for hydrocarbon injection systems cannot diagnose whether the fuel pressure sensor has failed.

Description

Technical Field

[0001] The present invention relates to the field of engine technology, and in particular to a diagnostic method, device, electronic equipment and storage medium for a hydrocarbon injection system. Background Art

[0002] Currently, the diagnostic process of traditional hydrocarbon injection system solutions mainly determines whether the air purge valve (APV), fuel switching valve (FCV), and fuel injection valve (FDV) are opening and closing normally by directly detecting whether the fuel pressure buildup and pressure relief processes are normal. However, this diagnostic method cannot diagnose whether there is a fault in the fuel pressure sensor. Summary of the Invention

[0003] In view of this, it is necessary to provide a diagnostic method, device, electronic device and storage medium for a hydrocarbon injection system to solve the technical problem that the diagnostic scheme of the existing hydrocarbon injection system cannot diagnose whether the fuel pressure sensor is faulty.

[0004] In order to solve the above problems, the present invention provides a diagnostic method for a hydrocarbon injection system, comprising:

[0005] After the engine starts, obtaining fuel pressure data collected by a fuel pressure sensor of a hydrocarbon injection system and air pressure data collected by an air pressure sensor;

[0006] When the fuel pressure data is less than the first pressure threshold or greater than the second pressure threshold, it is determined that the fuel pressure sensor is faulty; when the air pressure data is less than the first pressure threshold or greater than the second pressure threshold, it is determined that the air pressure sensor is faulty.

[0007] In one possible implementation, the method for diagnosing a hydrocarbon injection system further includes:

[0008] When the air pressure data is greater than a first pressure threshold and less than or equal to a third pressure threshold, determining that the air supply pressure of the hydrocarbon injection system is abnormal, the air purge valve is stuck in a closed position, or the fuel injection valve is stuck in a closed position;

[0009] The first pressure threshold is the exhaust pressure of the hydrocarbon injection system, and the third pressure threshold is less than the second pressure threshold.

[0010] In one possible implementation, the method for diagnosing a hydrocarbon injection system further includes:

[0011] When the air pressure data is greater than or equal to a fourth pressure threshold and less than a second pressure threshold, determining that the fuel injection valve is stuck in a closed position, the fuel switching valve is stuck in an open position, or a nozzle is clogged;

[0012] The fourth pressure threshold is greater than the first pressure threshold and less than the third pressure threshold.

[0013] In one possible implementation, the method for diagnosing a hydrocarbon injection system further includes:

[0014] When the fuel pressure data is greater than a first pressure threshold and less than a fifth pressure threshold, determining that the fuel injection valve is stuck in an open position or the fuel pressure is abnormal;

[0015] The fifth pressure threshold is smaller than the second pressure threshold, and the fifth pressure threshold is the fuel system pressure of the hydrocarbon injection system.

[0016] In one possible implementation, the method for diagnosing a hydrocarbon injection system further includes:

[0017] When the fuel pressure data is greater than a first pressure threshold and less than a second pressure threshold, and the fuel pressure data is equal to an exhaust pressure of a hydrocarbon injection system, it is determined that the fuel switching valve is stuck in a closed position.

[0018] In one possible implementation, the method for diagnosing a hydrocarbon injection system further includes:

[0019] When the fuel pressure data is greater than a first pressure threshold and less than a second pressure threshold, and the fuel pressure data is equal to the fuel pressure, it is determined that the fuel injection valve is stuck in the closed position.

[0020] In one possible implementation, the method for diagnosing a hydrocarbon injection system further includes:

[0021] Determine the fuel pressure change rate based on the fuel pressure data at different times;

[0022] When it is determined that the fuel pressure data decreases based on the fuel pressure change rate and the absolute value of the fuel pressure change rate is greater than a preset change rate threshold, it is determined that there is leakage in the fuel injection valve.

[0023] In another aspect, the present invention further provides a diagnostic device for a hydrocarbon injection system, comprising:

[0024] A data acquisition module is used to acquire fuel pressure data collected by the fuel pressure sensor of the hydrocarbon injection system and air pressure data collected by the air pressure sensor after the engine starts to start;

[0025] The fault diagnosis module is used to determine that the fuel pressure sensor has failed when the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, and to determine that the air pressure sensor has failed when the air pressure data is less than a first pressure threshold or greater than a second pressure threshold.

[0026] On the other hand, the present invention also provides an electronic device, comprising a memory and a processor, wherein:

[0027] The memory is used to store programs;

[0028] The processor is coupled to the memory and is configured to execute the program stored in the memory to implement the steps of the diagnostic method for a hydrocarbon injection system as described in any one of the above.

[0029] On the other hand, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method for diagnosing a hydrocarbon injection system as described above.

[0030] The beneficial effect of adopting the above-mentioned implementation method is as follows: the diagnostic method, device, electronic device and storage medium of the hydrocarbon injection system provided by the present invention obtain the fuel pressure data collected by the fuel pressure sensor of the hydrocarbon injection system and the air pressure data collected by the air pressure sensor after the engine starts; and when the fuel pressure data is less than the first pressure threshold or greater than the second pressure threshold, it is determined that the fuel pressure sensor has failed; when the air pressure data is less than the first pressure threshold or greater than the second pressure threshold, it is determined that the air pressure sensor has failed, thereby solving the technical problem that the diagnostic scheme of the existing hydrocarbon injection system scheme cannot diagnose whether there is a fault in the fuel pressure sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 A flow chart of an embodiment of a diagnostic method for a hydrocarbon injection system provided by the present invention;

[0033] Figure 2 A diagnostic diagram of another embodiment of the diagnostic method for a hydrocarbon injection system provided by the present invention;

[0034] Figure 3A schematic diagram of startup phase diagnosis in yet another embodiment of the diagnostic method for a hydrocarbon injection system provided by the present invention;

[0035] Figure 4 A functional block diagram of an embodiment of a diagnostic device for a hydrocarbon injection system provided by the present invention;

[0036] Figure 5 This is a schematic structural diagram of an embodiment of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0037] The following will provide a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0038] In the description of the embodiments of the present application, unless otherwise specified, “a plurality of” means two or more.

[0039] The terms "including" and "having" and any variations thereof in the embodiments of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or device comprising a series of steps or modules is not necessarily limited to those steps or modules explicitly listed, but may include other steps or modules not explicitly listed or inherent to these processes, methods, products or devices.

[0040] The naming or numbering of the steps in the embodiments of the present invention does not mean that the steps in the method flow must be executed in the time / logical sequence indicated by the naming or numbering. The execution order of the named or numbered process steps can be changed according to the technical purpose to be achieved, as long as the same or similar technical effects can be achieved.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The present invention provides a diagnostic method, device, electronic device, and storage medium for a hydrocarbon injection system (HCI), which are described below.

[0043] like Figure 1As shown, the present invention provides a diagnostic method for a hydrocarbon injection system, comprising:

[0044] S101, after the engine starts, obtaining fuel pressure data collected by a fuel pressure sensor of a hydrocarbon injection system and air pressure data collected by an air pressure sensor;

[0045] S102. When the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, determine that the fuel pressure sensor is faulty; when the air pressure data is less than a first pressure threshold or greater than a second pressure threshold, determine that the air pressure sensor is faulty.

[0046] It can be understood that the first pressure threshold is the exhaust pressure of the hydrocarbon injection system. The first pressure threshold can be set to 20 kPa, and the second pressure threshold can be set to 500 kPa.

[0047] When performing an air pressure check, if the air pressure data is less than a first pressure threshold, it may be determined that the air pressure sensor is faulty.

[0048] During the low pressure check, when the air pressure data is greater than a second pressure threshold, it may be determined that the air pressure sensor is faulty.

[0049] During the oil leakage check, when the fuel pressure data is greater than a second pressure threshold, it can be determined that a fault has occurred in the fuel pressure sensor.

[0050] The diagnostic method for the hydrocarbon injection system provided by the present invention can be applied to scenarios such as air pressure inspection, low pressure inspection, fuel pressure inspection, and fuel leakage inspection.

[0051] The diagnostic method for a hydrocarbon injection system provided by the present invention obtains fuel pressure data collected by a fuel pressure sensor of the hydrocarbon injection system and air pressure data collected by an air pressure sensor after the engine starts; and when the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, determines that the fuel pressure sensor has failed; and when the air pressure data is less than the first pressure threshold or greater than the second pressure threshold, determines that the air pressure sensor has failed, thereby solving the technical problem that the diagnostic scheme of the existing hydrocarbon injection system scheme cannot diagnose whether the fuel pressure sensor has failed.

[0052] In some embodiments, the method for diagnosing a hydrocarbon injection system further includes:

[0053] When the air pressure data is greater than a first pressure threshold and less than or equal to a third pressure threshold, determining that the air supply pressure of the hydrocarbon injection system is abnormal, the air purge valve is stuck in a closed position, or the fuel injection valve is stuck in a closed position;

[0054] The first pressure threshold is the exhaust pressure of the hydrocarbon injection system, and the third pressure threshold is less than the second pressure threshold.

[0055] It is understandable that, when performing an air pressure check, the third pressure threshold may be set to 30 kPa.

[0056] When the air pressure data is greater than the first pressure threshold and less than or equal to the third pressure threshold, it may be that the air supply pressure of the hydrocarbon injection system is abnormal, the air purge valve is stuck in the closed position, or the fuel injection valve is stuck in the closed position. These reasons will cause the fuel pressure data to be greater than the first pressure threshold and less than or equal to the third pressure threshold.

[0057] The gas supply pressure of the hydrocarbon injection system is abnormal. It may be that the gas supply pressure of the hydrocarbon injection system is lower than the normal value, or there is a leak.

[0058] In some embodiments, the method for diagnosing a hydrocarbon injection system further includes:

[0059] When the air pressure data is greater than or equal to a fourth pressure threshold and less than a second pressure threshold, determining that the fuel injection valve is stuck in a closed position, the fuel switching valve is stuck in an open position, or a nozzle is clogged;

[0060] The fourth pressure threshold is greater than the first pressure threshold and less than the third pressure threshold.

[0061] It is understandable that when performing a low pressure check, the fourth pressure threshold may be set to 25 kPa.

[0062] In some embodiments, the method for diagnosing a hydrocarbon injection system further includes:

[0063] When the fuel pressure data is greater than a first pressure threshold and less than a fifth pressure threshold, determining that the fuel injection valve is stuck in an open position or the fuel pressure is abnormal;

[0064] The fifth pressure threshold is smaller than the second pressure threshold, and the fifth pressure threshold is the fuel system pressure of the hydrocarbon injection system.

[0065] It is understandable that when performing a fuel pressure check, the fifth pressure threshold may be set to 70 kPa.

[0066] In some embodiments, the method for diagnosing a hydrocarbon injection system further includes:

[0067] When the fuel pressure data is greater than a first pressure threshold and less than a second pressure threshold, and the fuel pressure data is equal to an exhaust pressure of a hydrocarbon injection system, it is determined that the fuel switching valve is stuck in a closed position.

[0068] In some embodiments, the method for diagnosing a hydrocarbon injection system further includes:

[0069] When the fuel pressure data is greater than a first pressure threshold and less than a second pressure threshold, and the fuel pressure data is equal to the fuel pressure, it is determined that the fuel injection valve is stuck in the closed position.

[0070] In some embodiments, the method for diagnosing a hydrocarbon injection system further includes:

[0071] Determine the fuel pressure change rate based on the fuel pressure data at different times;

[0072] When it is determined that the fuel pressure data decreases based on the fuel pressure change rate and the absolute value of the fuel pressure change rate is greater than a preset change rate threshold, it is determined that there is leakage in the fuel injection valve.

[0073] In some embodiments, the present invention provides a method for diagnosing a hydrocarbon injection system, referring to Figure 3 As shown, specifically including:

[0074] 1. Air pressure check:

[0075] When the air pressure sensor reading (air pressure data) is lower than the exhaust pressure (air pressure sensor reading P1 ≤ 20kPa), it indicates a pressure sensor fault (air pressure sensor fault).

[0076] When the air pressure sensor reading is lower than the air system pressure (20kPa≤P1≤30kPa), it indicates low air supply pressure or air supply leakage, or the APV (air purge valve) or FDV (fuel injection valve) is stuck in the closed position.

[0077] 2. Low voltage inspection:

[0078] The air pressure sensor reading (air pressure data) is higher than 500kPa (air pressure sensor reading P2 ≥ 500kPa), indicating a pressure sensor fault (low pressure sensor fault).

[0079] The fuel pressure sensor reading is higher than the exhaust pressure (25kPa≤P2≤500kPa), indicating that the FDV is stuck in the closed position, the FCV (fuel switching valve) is stuck in the open position, or the nozzle is clogged.

[0080] 3. Fuel pressure check:

[0081] When the fuel pressure sensor reads exhaust pressure, it means the FCV is stuck closed.

[0082] The fuel pressure sensor reading (fuel pressure data) is lower than the fuel system pressure (20kPa ≤ fuel pressure sensor reading P3 ≤ 70kPa), indicating that the FDV is stuck in the open position or the fuel pressure is low.

[0083] When the fuel pressure sensor reads low exhaust pressure (P3 ≤ 20 kPa), it indicates a pressure sensor fault (fuel pressure sensor fault).

[0084] 4. Fuel leak inspection:

[0085] A decreasing fuel pressure sensor reading (which monitors the rate of oil pressure drop) indicates a leak in the FDV.

[0086] 5. Oil leakage inspection:

[0087] When the fuel pressure sensor reading (fuel pressure data) is fuel pressure (fuel pressure sensor reading P5 ≥ 70kPa), it indicates that the FDV is stuck in the closed position.

[0088] A fuel pressure sensor reading higher than 500kPa (P5 ≥ 500kPa) indicates a fuel delivery sensor fault.

[0089] The diagnostic fault list is shown in Table 1:

[0090] Table 1: Diagnostic Fault Checklist

[0091]

[0092] 1. The AHI fuel pressure sensor is unreliable:

[0093] Low pressure sensor fault & fuel delivery sensor fault occur at the same time or

[0094] This fault will be activated if air pressure sensor fault & fuel pressure sensor fault occur at the same time;

[0095] 2. AHI fuel air purge valve stuck in the closed position:

[0096] Atio_sensorfault=false&1. Airpressurefault;

[0097] 3. AHI fuel injection valve stuck in the closed position:

[0098] Atio_sensorfault=false And 5_fueldeliveryfault=ture;

[0099] 4.AHI fuel injection valve - oil leakage or seal failure:

[0100] fuelleakFault;

[0101] 5. AHI fuel supply valve stuck in the closed position:

[0102] Atio_sensorfault=false&3_fuelpressurefault=ture;

[0103] 6. AHI fuel air purge valve stuck in the open position:

[0104] Atio_sensorfault=false&no IDTC_ATI1_FD_PL&2. Lowpressure fault;

[0105] 7. AHI fuel supply valve leaks or seal fails:

[0106] During the engine startup phase, the oil pressure is detected. If it exceeds a certain limit, it is considered a leak. For details, please refer to Figure 4 shown.

[0107] like Figure 4 As shown, the present invention further provides a diagnostic device 400 for a hydrocarbon injection system, comprising:

[0108] The data acquisition module 401 is used to acquire the fuel pressure data collected by the fuel pressure sensor of the hydrocarbon injection system and the air pressure data collected by the air pressure sensor after the engine starts;

[0109] a fault diagnosis module 402 configured to determine that the fuel pressure sensor is faulty if the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, and to determine that the air pressure sensor is faulty if the air pressure data is less than a first pressure threshold or greater than a second pressure threshold;

[0110] The valve position determination module 403 is configured to determine the position of the air purge valve, the fuel switching valve, or the fuel injection valve of the hydrocarbon injection system based on the fuel pressure data when the fuel pressure data is greater than a first pressure threshold and less than a second pressure threshold.

[0111] It can be understood that the first pressure threshold is the exhaust pressure of the hydrocarbon injection system. The first pressure threshold can be set to 20 kPa, and the second pressure threshold can be set to 500 kPa.

[0112] When performing an air pressure check, if the air pressure data is less than a first pressure threshold, it may be determined that the air pressure sensor is faulty.

[0113] During the low pressure check, when the air pressure data is greater than a second pressure threshold, it may be determined that the air pressure sensor is faulty.

[0114] During the oil leakage check, when the fuel pressure data is greater than a second pressure threshold, it can be determined that a fault has occurred in the fuel pressure sensor.

[0115] The diagnostic device for the hydrocarbon injection system provided by the present invention can be applied to scenarios such as air pressure inspection, low pressure inspection, fuel pressure inspection, and fuel leakage inspection.

[0116] The diagnostic device for a hydrocarbon injection system provided by the present invention obtains fuel pressure data collected by a fuel pressure sensor of the hydrocarbon injection system and air pressure data collected by an air pressure sensor after the engine starts; and determines that the fuel pressure sensor has failed if the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, and determines that the air pressure sensor has failed if the air pressure data is less than the first pressure threshold or greater than the second pressure threshold, thereby solving the technical problem that the diagnostic scheme of the existing hydrocarbon injection system scheme cannot diagnose whether the fuel pressure sensor has failed.

[0117] The diagnostic device for the hydrocarbon injection system provided in the above embodiment can implement the technical solution described in the above embodiment of the diagnostic method for the hydrocarbon injection system. The specific implementation principles of the above modules or units can be found in the corresponding contents in the above embodiment of the diagnostic method for the hydrocarbon injection system, which will not be repeated here.

[0118] like Figure 5 As shown, the present invention also provides an electronic device 500. The electronic device 500 includes a processor 501, a memory 502 and a display 503. Figure 5 Only some of the components of the electronic device 500 are shown, but it should be understood that implementation of all of the shown components is not required, and more or fewer components may be implemented instead.

[0119] In some embodiments, the memory 502 may be an internal storage unit of the electronic device 500, such as a hard disk or memory of the electronic device 500. In other embodiments, the memory 502 may also be an external storage device of the electronic device 500, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the electronic device 500.

[0120] Furthermore, the memory 502 may include both an internal storage unit of the electronic device 500 and an external storage device. The memory 502 is used to store application software installed in the electronic device 500 and various data.

[0121] In some embodiments, the processor 501 may be a central processing unit (CPU), a microprocessor, or other data processing chip, configured to execute program codes or process data stored in the memory 502 , such as the diagnostic method for the hydrocarbon injection system of the present invention.

[0122] In some embodiments, display 503 can be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 503 is used to display information on electronic device 500 and to display a visual user interface. Components 501-503 of electronic device 500 communicate with each other via a system bus.

[0123] In some embodiments of the present invention, when the processor 501 executes the diagnostic program of the hydrocarbon injection system in the memory 502, the following steps may be implemented:

[0124] After the engine starts, obtaining fuel pressure data collected by a fuel pressure sensor of a hydrocarbon injection system and air pressure data collected by an air pressure sensor;

[0125] When the fuel pressure data is less than the first pressure threshold or greater than the second pressure threshold, it is determined that the fuel pressure sensor is faulty; when the air pressure data is less than the first pressure threshold or greater than the second pressure threshold, it is determined that the air pressure sensor is faulty.

[0126] It should be understood that, in addition to the above functions, the processor 501 may also implement other functions when executing the diagnostic program of the hydrocarbon injection system in the memory 502 . For details, please refer to the description of the corresponding method embodiment above.

[0127] Furthermore, the embodiments of the present invention do not specifically limit the type of electronic device 500 mentioned. The electronic device 500 may be a portable electronic device such as a mobile phone, tablet computer, personal digital assistant (PDA), wearable device, or laptop computer. Exemplary embodiments of portable electronic devices include, but are not limited to, portable electronic devices running iOS, Android, Microsoft, or other operating systems. The portable electronic devices mentioned above may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in other embodiments of the present invention, the electronic device 500 may not be a portable electronic device, but rather a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0128] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method for diagnosing a hydrocarbon injection system provided by the above methods is implemented. The method includes:

[0129] After the engine starts, obtaining fuel pressure data collected by a fuel pressure sensor of a hydrocarbon injection system and air pressure data collected by an air pressure sensor;

[0130] When the fuel pressure data is less than the first pressure threshold or greater than the second pressure threshold, it is determined that the fuel pressure sensor is faulty; when the air pressure data is less than the first pressure threshold or greater than the second pressure threshold, it is determined that the air pressure sensor is faulty.

[0131] Those skilled in the art will appreciate that all or part of the process steps of the above-described embodiments can be implemented by instructing related hardware through a computer program, and the program can be stored in a computer-readable storage medium, such as a magnetic disk, an optical disk, a read-only memory, or a random access memory.

[0132] The diagnostic method, device, electronic device and storage medium of the hydrocarbon injection system provided by the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there may be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A diagnostic method for a hydrocarbon injection system, characterized in that: include: After the engine starts, obtaining fuel pressure data collected by a fuel pressure sensor of a hydrocarbon injection system and air pressure data collected by an air pressure sensor; When the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, determining that the fuel pressure sensor is faulty; and when the air pressure data is less than a first pressure threshold or greater than a second pressure threshold, determining that the air pressure sensor is faulty; The diagnostic method of the hydrocarbon injection system also includes: When the air pressure data is greater than the first pressure threshold and less than or equal to the third pressure threshold, determining that the air supply pressure of the hydrocarbon injection system is abnormal, the air purge valve is stuck in the closed position, or the fuel injection valve is stuck in the closed position; The first pressure threshold is the exhaust pressure of the hydrocarbon injection system, the third pressure threshold is smaller than the second pressure threshold, and the first pressure threshold is smaller than the second pressure threshold.

2. The diagnostic method of hydrocarbon injection system according to claim 1, characterized in that: Also includes: When the fuel pressure data is greater than or equal to a fourth pressure threshold and less than a second pressure threshold, determining that the fuel injection valve is stuck in a closed position, the fuel switching valve is stuck in an open position, or the nozzle is clogged; The fourth pressure threshold is greater than the first pressure threshold and less than the third pressure threshold.

3. The diagnostic method of hydrocarbon injection system according to claim 1, characterized in that: Also includes: When the fuel pressure data is greater than a first pressure threshold and less than a fifth pressure threshold, determining that the fuel injection valve is stuck in an open position or the fuel pressure is abnormal; The fifth pressure threshold is smaller than the second pressure threshold.

4. The diagnostic method for hydrocarbon injection system according to any one of claims 1 to 3, characterized in that: Also includes: Determine the fuel pressure change rate based on the fuel pressure data at different times; When it is determined that the fuel pressure data decreases based on the fuel pressure change rate and the absolute value of the fuel pressure change rate is greater than a preset change rate threshold, it is determined that there is leakage in the fuel injection valve.

5. A diagnostic device for a hydrocarbon injection system, characterized in that: include: A data acquisition module is used to acquire fuel pressure data collected by the fuel pressure sensor of the hydrocarbon injection system and air pressure data collected by the air pressure sensor after the engine starts to start; a fault diagnosis module, configured to determine that the fuel pressure sensor has failed if the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, and to determine that the air pressure sensor has failed if the air pressure data is less than the first pressure threshold or greater than a second pressure threshold; The diagnostic device for hydrocarbon injection systems is also used for: When the air pressure data is greater than the first pressure threshold and less than or equal to the third pressure threshold, determining that the air supply pressure of the hydrocarbon injection system is abnormal, the air purge valve is stuck in the closed position, or the fuel injection valve is stuck in the closed position; The first pressure threshold is the exhaust pressure of the hydrocarbon injection system, the third pressure threshold is smaller than the second pressure threshold, and the first pressure threshold is smaller than the second pressure threshold.

6. An electronic device, characterized in that: comprising a memory and a processor, wherein, The memory is used to store programs; The processor is coupled to the memory and is configured to execute the program stored in the memory to implement the steps of the method for diagnosing a hydrocarbon injection system according to any one of claims 1 to 4.

7. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for diagnosing a hydrocarbon injection system according to any one of claims 1 to 4 are implemented.

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