Diagnosis method and apparatus for hydrocarbon injection system, electronic device, and storage medium

Abstract

The present invention relates to the technical field of engines, and provides a diagnosis method and apparatus for a hydrocarbon injection system, an electronic device, and a storage medium. The method comprises: after an engine starts, acquiring fuel pressure data collected by a fuel pressure sensor of the hydrocarbon injection system and air pressure data collected by an air pressure sensor; and determining that the fuel pressure sensor is faulty when 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 is faulty when the air pressure data is less than the first pressure threshold or greater than the second pressure threshold. In the present invention, by collecting the fuel pressure data and the air pressure data, whether the fuel pressure sensor or the air pressure sensor is faulty can be determined, thereby solving the technical problem that existing diagnostic solutions for the hydrocarbon injection system cannot diagnose whether the fuel pressure sensor is faulty.

Description

Method and device for diagnosing hydrocarbon injection system, electronic equipment and storage medium TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to a method and device for diagnosing a hydrocarbon injection system, an electronic equipment and a storage medium. BACKGROUND

[0002] Currently, the diagnosis process of the traditional hydrocarbon injection system scheme mainly judges whether the opening and closing of the air purge valve (APV), the fuel on-off valve (FCV) and the fuel injection valve (FDV) are normal by directly detecting whether the establishment process and pressure relief process of the fuel pressure are normal. However, this diagnosis method cannot diagnose whether the fuel pressure sensor has a fault. SUMMARY

[0003] Therefore, it is necessary to provide a method and device for diagnosing a hydrocarbon injection system, an electronic equipment and a storage medium to solve the technical problem that the diagnosis scheme of the existing hydrocarbon injection system scheme cannot diagnose whether the fuel pressure sensor has a fault.

[0004] To solve the above problems, in one aspect, the present application provides a method for diagnosing a hydrocarbon injection system, comprising:

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

[0006] In the case that the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, determining that the fuel pressure sensor has a fault, and in the case that the air pressure data is less than the first pressure threshold or greater than the second pressure threshold, determining that the air pressure sensor has a fault.

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

[0008] In the case that the air pressure data is greater than the 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 the closed position or the fuel injection valve is stuck in the 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 comprises:

[0011] In a case that the air pressure data is greater than or equal to a fourth pressure threshold and less than a second pressure threshold, it is determined that the fuel injection valve is stuck in a closed position, the fuel switch valve is stuck in an open position, or there is a nozzle blockage;

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

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

[0014] In a case that the fuel pressure data is greater than a first pressure threshold and less than a fifth pressure threshold, it is determined that the fuel injection valve is stuck in an open position or the fuel pressure is abnormal.

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

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

[0017] In a case that 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 the hydrocarbon injection system, it is determined that the fuel switch valve is stuck in a closed position.

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

[0019] In a case that 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 a fuel pressure, it is determined that the fuel injection valve is stuck in a closed position.

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

[0021] Based on the fuel pressure data at different times, a fuel pressure change rate is determined.

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

[0023] In another aspect, the present application also provides a diagnosis device for a hydrocarbon injection system, which includes:

[0024] A data acquisition module is configured to acquire 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 to start.

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

[0026] In another aspect, the present application also provides an electronic device comprising a memory and a processor, wherein,

[0027] the memory is configured to store a program;

[0028] the processor is coupled to the memory and configured to execute the program stored in the memory to implement the steps of the diagnosis method of the hydrocarbon injection system according to any one of the above.

[0029] In another aspect, the present application also 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 diagnosis method of the hydrocarbon injection system according to any one of the above.

[0030] The diagnosis method of the hydrocarbon injection system, the device, the electronic device and the storage medium provided by the present application have the following beneficial effects: after the engine starts, 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 are obtained; and when the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, it is determined that the fuel pressure sensor is faulty, and 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, thereby solving the technical problem that the diagnosis method of the existing hydrocarbon injection system scheme cannot diagnose whether the fuel pressure sensor is faulty. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Fig. 1 is a flowchart of one embodiment of the diagnosis method of the hydrocarbon injection system provided by the present application;

[0033] Fig. 2 is a diagnosis schematic diagram of another embodiment of the diagnosis method of the hydrocarbon injection system provided by the present application;

[0034] Fig. 3 is a schematic diagram of start-up stage diagnosis in another embodiment of the diagnosis method of the hydrocarbon injection system provided by the present application;

[0035] Fig. 4 is a schematic block diagram of one embodiment of a diagnostic device for a hydrocarbon injection system according to the present application;

[0036] Fig. 5 is a schematic block diagram of one embodiment of an electronic device according to the present application. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person skilled in the art without creative work fall within the protection scope of the present application.

[0038] In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0039] In the embodiments of the present application, the terms "comprising" and "having" and any variations thereof are intended to cover the inclusions not exclusively, for example, the processes, methods, devices, products or equipment comprising a series of steps or modules do not have to be limited to the clearly listed steps or modules, but can include other steps or modules that are not clearly listed or inherent to these processes, methods, products or equipment.

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

[0041] Reference to "an embodiment" in this document means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears at various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to other embodiments. It is explicitly and implicitly understood by a person skilled in the art that the embodiments described herein can be combined with other embodiments.

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

[0043] As shown in Fig. 1, the present application provides a diagnostic method for a hydrocarbon injection system, comprising:

[0044] S101, after the engine starts to start, 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;

[0045] S102, in the case that 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 fails, and in the case that 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 fails.

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

[0047] When the air pressure inspection is performed, when the air pressure data is less than the first pressure threshold, it can be determined that the air pressure sensor fails.

[0048] When the low pressure inspection is performed, when the air pressure data is greater than the second pressure threshold, it can be determined that the air pressure sensor fails.

[0049] When the oil leakage inspection is performed, when the fuel pressure data is greater than the second pressure threshold, it can be determined that the fuel pressure sensor fails.

[0050] The diagnostic method of the hydrocarbon injection system provided by the application can be applied to air pressure inspection, low pressure inspection, fuel pressure inspection, fuel leakage inspection and the like.

[0051] The diagnostic method of the hydrocarbon injection system provided by the application, after the engine starts to start, acquires 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, and in the case that 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 fails, and in the case that 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 fails, thereby solving the technical problem that the existing diagnostic scheme of the hydrocarbon injection system scheme cannot diagnose whether the fuel pressure sensor fails.

[0052] In some embodiments, the diagnostic method of the hydrocarbon injection system further comprises:

[0053] In the case that the air pressure data is greater than the first pressure threshold and less than or equal to the third pressure threshold, it is determined 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.

[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 can be understood that the third pressure threshold can be set to 30 kPa when the air pressure check is performed.

[0056] In the case that the air pressure data is greater than the first pressure threshold and less than or equal to the third pressure threshold, the air supply pressure of the hydrocarbon injection system can be abnormal, the air purge valve can be stuck in the closed position, or the fuel injection valve can be stuck in the closed position, which can all 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 abnormal air supply pressure of the hydrocarbon injection system can be that the air supply pressure of the hydrocarbon injection system is lower than the normal value or a leakage occurs.

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

[0059] In the case that the air pressure data is greater than or equal to the fourth pressure threshold and less than the second pressure threshold, it is determined that the fuel injection valve is stuck in the closed position, the fuel switch valve is stuck in the open position, or there is a nozzle blockage;

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

[0061] It can be understood that the fourth pressure threshold can be set to 25 kPa when the low pressure check is performed.

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

[0063] In the case that the fuel pressure data is greater than the first pressure threshold and less than the fifth pressure threshold, it is determined that the fuel injection valve is stuck in the open position or the fuel pressure is abnormal.

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

[0065] It can be understood that the fifth pressure threshold can be set to 70 kPa when the fuel pressure check is performed.

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

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

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

[0069] In the case that the fuel pressure data is greater than the first pressure threshold and less than the 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 the hydrocarbon injection system further comprises:

[0071] Based on the fuel pressure data at different times, a fuel pressure change rate is determined;

[0072] In the case that the fuel pressure data is determined to decrease 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 the fuel injection valve has a leak.

[0073] In some embodiments, the present application provides a method for diagnosing a hydrocarbon injection system, as shown in Figure 3, which specifically comprises:

[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 that the pressure sensor is faulty (air pressure sensor fault).

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

[0077] 2. Low pressure check:

[0078] When the air pressure sensor reading (air pressure data) is higher than 500kPa (air pressure sensor reading P2≥500kPa), it indicates that the pressure sensor is faulty (low pressure sensor fault).

[0079] When the fuel pressure sensor reading is higher than the exhaust pressure (25kPa≤P2≤500kPa), it indicates that the FDV is stuck in the closed position, the FCV (fuel switch valve) is stuck in the open position, or the nozzle is blocked.

[0080] 3. Fuel pressure check:

[0081] When the fuel pressure sensor reading is the exhaust pressure, it indicates that the FCV is stuck in the closed position.

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

[0083] Fuel pressure sensor reading is low when the exhaust pressure is low (P3 ≤ 20 kPa), indicating a fuel pressure sensor fault.

[0084] 4. Fuel leak check:

[0085] Fuel pressure sensor reading is low (monitoring the rate of decrease in oil pressure), indicating that the FDV is leaking.

[0086] 5. Oil leak check:

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

[0088] Fuel pressure sensor reading is higher than 500 kPa (P5 ≥ 500 kPa), indicating a fuel delivery sensor fault.

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

[0090] Table 1: List of diagnostic faults

[0091] 1. AHI fuel pressure sensor is not reliable:

[0092] low pressure sensor fault & fuel delivery sensor fault occur simultaneously or air pressure sensor fault & fuel pressure sensor fault occur simultaneously to activate the fault;

[0093] 2. AHI fuel air purge valve stuck in the closed position:

[0094] Atio_sensorfault = false & 1. Air pressure fault;

[0095] 3. AHI fuel injection valve stuck in the closed position:

[0096] Atio_sensorfault = false And 5_fueldeliveryfault = true;

[0097] 4. AHI fuel injection valve - leak or seal failure:

[0098] fuelleakFault;

[0099] 5. AHI fuel supply valve stuck in closed position:

[0100] Atio_sensorfault = false & 3_fuelpressurefault = true;

[0101] 6. AHI fuel air purge valve stuck in open position:

[0102] Atio_sensorfault = false & no IDTC_ATI1_FD_PL & 2. Low pressure fault;

[0103] 7. AHI fuel supply valve leak or seal failure:

[0104] Engine start phase checks oil pressure, if it exceeds certain limit then it is judged as a leak, which can be referred to Fig. 4.

[0105] As shown in Fig. 4, the present application further provides a diagnosis device 400 of a hydrocarbon injection system, comprising:

[0106] a data acquisition module 401, configured to acquire 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;

[0107] a fault diagnosis module 402, configured to determine that the fuel pressure sensor is faulty when the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, and determine that the air pressure sensor is faulty when the air pressure data is less than the first pressure threshold or greater than the second pressure threshold;

[0108] a valve position determination module 403, configured to determine the position of an air purge valve, a fuel on-off valve or a fuel injection valve of the hydrocarbon injection system based on the fuel pressure data when the fuel pressure data is greater than the first pressure threshold and less than the second pressure threshold.

[0109] It can be understood that the first pressure threshold is the exhaust pressure of the hydrocarbon injection system, and the first pressure threshold can be set to 20 kPa, and the second pressure threshold can be set to 500 kPa.

[0110] When checking the air pressure, it can be determined that the air pressure sensor is faulty when the air pressure data is less than the first pressure threshold.

[0111] When the air pressure data is greater than the second pressure threshold value during the low pressure check, it can be determined that the air pressure sensor is malfunctioning.

[0112] When the fuel pressure data is greater than the second pressure threshold value during the fuel leakage check, it can be determined that the fuel pressure sensor is malfunctioning.

[0113] The diagnostic device for the hydrocarbon injection system provided by the present application can be applied to air pressure check, low pressure check, fuel pressure check, fuel leakage check and the like.

[0114] The diagnostic device for the hydrocarbon injection system provided by the present application, after the engine starts, acquires fuel pressure data collected by a fuel pressure sensor of the hydrocarbon injection system and air pressure data collected by an air pressure sensor; and in the case that the fuel pressure data is less than a first pressure threshold value or greater than a second pressure threshold value, it is determined that the fuel pressure sensor is malfunctioning, and in the case that the air pressure data is less than the first pressure threshold value or greater than the second pressure threshold value, it is determined that the air pressure sensor is malfunctioning, thereby solving the technical problem that the existing diagnostic scheme of the hydrocarbon injection system scheme cannot diagnose whether the fuel pressure sensor is malfunctioning.

[0115] The diagnostic device for the hydrocarbon injection system provided by the above embodiments can implement the technical solutions described in the diagnostic method embodiments of the hydrocarbon injection system, and the principles of the specific implementation of the above modules or units can be referred to the corresponding content in the diagnostic method embodiments of the hydrocarbon injection system, which will not be described here again.

[0116] As shown in FIG. 5, the present application further provides an electronic device 500. The electronic device 500 includes a processor 501, a memory 502 and a display 503. FIG. 5 only shows part of the components of the electronic device 500, but it should be understood that all the components shown are not required, and more or less components can be alternatively implemented.

[0117] The memory 502 can be an internal storage unit of the electronic device 500 in some embodiments, for example, a hard disk or a memory of the electronic device 500. The memory 502 can also be an external storage device of the electronic device 500 in other embodiments, for example, a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card and the like equipped on the electronic device 500.

[0118] Further, the memory 502 can include both an internal storage unit and an external storage device of the electronic device 500. The memory 502 is used to store application software and various data installed on the electronic device 500.

[0119] The processor 501 may, in some embodiments, be a central processing unit (CPU), a microprocessor, or other data processing chip, for running program codes stored in the memory 502 or processing data, such as the diagnostic method of the hydrocarbon injection system in the present application.

[0120] The display 503 may, in some embodiments, be an LED display, a liquid crystal display, a touch liquid crystal display, an OLED (Organic Light-Emitting Diode) touch, or the like. The display 503 is used to display information of the electronic device 500 and to display a visualized user interface. The components 501-503 of the electronic device 500 communicate with each other through a system bus.

[0121] In some embodiments of the present application, when the processor 501 executes the diagnostic program of the hydrocarbon injection system in the memory 502, the following steps can be implemented:

[0122] After the engine starts to start, 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 are acquired;

[0123] In the case that the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, it is determined that the fuel pressure sensor fails, and in the case that the air pressure data is less than a first pressure threshold or greater than a second pressure threshold, it is determined that the air pressure sensor fails.

[0124] It should be understood that, in addition to the above functions, the processor 501 can also implement other functions when executing the diagnostic program of the hydrocarbon injection system in the memory 502, which can be referred to the description of the corresponding method embodiments.

[0125] Further, the type of the electronic device 500 referred to in the embodiments of the present application is not specifically limited, and the electronic device 500 can be a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop, or the like. Exemplary embodiments of the portable electronic device include, but are not limited to, a portable electronic device running an IOS, android, microsoft, or other operating system. The above-mentioned portable electronic device can also be other portable electronic devices, such as a laptop having a touch-sensitive surface (e.g., a touch panel). It should also be understood that, in some other embodiments of the present application, the electronic device 500 can also be a desktop computer having a touch-sensitive surface (e.g., a touch panel).

[0126] In yet another aspect, the present application also provides a non-transitory computer readable storage medium having stored thereon a computer program, which, when executed by a processor, implements the method for diagnosing the hydrocarbon injection system provided by any of the above methods, the method comprising:

[0127] After the engine starts to start, obtaining fuel pressure data collected by a fuel pressure sensor of the hydrocarbon injection system and air pressure data collected by an air pressure sensor;

[0128] In the case that the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, determining that the fuel pressure sensor fails, and in the case that the air pressure data is less than the first pressure threshold or greater than the second pressure threshold, determining that the air pressure sensor fails.

[0129] Those skilled in the art can understand that all or part of the processes of the above-mentioned embodiments can be completed by a computer program instructing related hardware, and the program can be stored in a computer readable storage medium. The computer readable storage medium includes a magnetic disk, an optical disk, a read-only memory, a random access memory, etc.

[0130] The above describes the method for diagnosing the hydrocarbon injection system, the device, the electronic equipment and the storage medium provided by the present application in detail. The principle and implementation of the present application are described by applying specific examples. The above examples are only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A diagnostic method for a hydrocarbon injection system, characterized by, Comprising: After the engine starts, acquiring fuel pressure data collected by a fuel pressure sensor of the hydrocarbon injection system and air pressure data collected by an air pressure sensor; In the case that the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, determining that the fuel pressure sensor fails, and in the case that the air pressure data is less than the first pressure threshold or greater than the second pressure threshold, determining that the air pressure sensor fails.

2. The diagnostic method for a hydrocarbon injection system according to claim 1, characterized by, Further comprising: In the case that the air pressure data is greater than the 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 the closed position, or the fuel injection valve is stuck in the closed position; Wherein, 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.

3. The diagnostic method for a hydrocarbon injection system according to claim 2, characterized in that, Further comprising: In the case that the air pressure data is greater than or equal to a fourth pressure threshold and less than the second pressure threshold, determining that the fuel injection valve is stuck in the closed position, the fuel switch valve is stuck in the open position, or there is a nozzle blockage; Wherein, the fourth pressure threshold is greater than the first pressure threshold and less than the third pressure threshold.

4. The diagnostic method for a hydrocarbon injection system according to claim 2, characterized by, Further comprising: In the case that the fuel pressure data is greater than the first pressure threshold and less than a fifth pressure threshold, determining that the fuel injection valve is stuck in the open position or the fuel pressure is abnormal; Wherein, the fifth pressure threshold is less than the second pressure threshold, and the fifth pressure threshold is the fuel system pressure of the hydrocarbon injection system.

5. The method of diagnosing a hydrocarbon injection system of claim 2, wherein, Further comprising: In the case that the fuel pressure data is greater than the first pressure threshold and less than the second pressure threshold, and the fuel pressure data is equal to the exhaust pressure of the hydrocarbon injection system, determining that the fuel switch valve is stuck in the closed position.

6. The diagnostic method for a hydrocarbon injection system according to claim 2, characterized by, Further comprising: In the case that the fuel pressure data is greater than the first pressure threshold and less than the second pressure threshold, and the fuel pressure data is equal to the fuel pressure, determining that the fuel injection valve is stuck in the closed position.

7. The method of diagnosing a hydrocarbon injection system according to any one of claims 1 to 6, wherein Further comprising: Determining the fuel pressure change rate based on the fuel pressure data at different times; In the case 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, determining that the fuel injection valve has a leak.

8. A diagnostic device for a hydrocarbon injection system, characterized in that Comprising: A data acquisition module, configured to acquire, after the engine starts, fuel pressure data collected by a fuel pressure sensor of the hydrocarbon injection system and air pressure data collected by an air pressure sensor; A fault diagnosis module, configured to determine that the fuel pressure sensor fails in the case that the fuel pressure data is less than a first pressure threshold or greater than a second pressure threshold, and determine that the air pressure sensor fails in the case that the air pressure data is less than the first pressure threshold or greater than the second pressure threshold.

9. An electronic device, comprising: Comprising a memory and a processor, wherein, The memory is configured to store a program; The processor is coupled with the memory and is configured to execute the program stored in the memory to implement the steps of the diagnosis method of the hydrocarbon injection system according to any one of claims 1 to 7. 10.A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program, which is executed by a processor, implements the steps of the diagnostic method of the hydrocarbon injection system according to any one of claims 1 to 7.

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