A method and device for detecting a failure of an injection valve, an electronic device and a storage medium

Abstract

The application discloses a kind of injection valve fault detection method, device, electronic equipment and storage medium.The injection valve fault detection includes: when current engine is in steady state condition, current injection valve pressure in engine gas rail is collected, and the real-time segment time of current cylinder is determined based on the current injection valve pressure;The amplitude corresponding to the frequency of the real-time segment time is extracted, and whether to report injection valve failure is judged according to the amplitude.The application solves the problem that the current injection valve failure will lead to injection quantity difference and further cause engine failure, and at the same time, the injection valve failure cannot be accurately detected, to realize ensuring the correct injection of injection valve, while not relying on hardware improvement, saving cost.

Description

Technical Field

[0001] This invention relates to the field of jet valve fault detection technology, and in particular to a jet valve fault detection method, device, electronic equipment and storage medium. Background Technology

[0002] The gas injection valve is one of the core components of a gas engine. Its performance directly affects engine performance. During use, various factors such as wear and aging can alter the condition of the injection valve nozzle, leading to a significant difference between the rated and actual injection volume. In some cases, nozzle blockage can even cause misfires in a single cylinder. Summary of the Invention

[0003] This invention provides a method, apparatus, electronic device, and storage medium for detecting injection valve faults, in order to solve the current problem that injection valve faults can lead to differences in jet volume and thus cause engine failures, while the faults of injection valves cannot be accurately detected.

[0004] According to one aspect of the present invention, a method for detecting a fault in an injection valve is provided, the method comprising:

[0005] When the engine is in steady-state operation, the current injection valve pressure in the engine rail is collected, and the real-time segment time of the current cylinder is determined based on the current injection valve pressure.

[0006] Extract the amplitude corresponding to the frequency of the real-time segment time, and determine whether to report a jet valve malfunction based on the amplitude.

[0007] Optionally, before determining the real-time segment time of the current cylinder based on the current injection valve pressure, the method further includes:

[0008] Get the current engine speed and determine the number of cylinders in the current engine;

[0009] Determining the real-time segment time of the current cylinder based on the current injection valve pressure includes:

[0010] The real-time segment time of the current cylinder is determined based on the current injection valve pressure, the current engine speed, and the number of engine cylinders.

[0011] Optionally, extracting the amplitude corresponding to the frequency of the real-time segment time includes:

[0012] The amplitude corresponding to the frequency of the real-time segment time is extracted based on the rail pressure spectrum diagram when the injection valve is working.

[0013] Optionally, extracting the amplitude corresponding to the frequency of the real-time segment time includes:

[0014] Based on the number of engine cylinders, multiple preset sub-frequency units corresponding to the real-time segment time are determined;

[0015] Extract the amplitude at at least one set sub-frequency as the amplitude corresponding to the frequency of the real-time segment time.

[0016] Optionally, the engine has six cylinders, and the multiple set sub-frequency values ​​corresponding to the real-time segment time are 1 / 6 times the frequency, 2 / 6 times the frequency, 3 / 6 times the frequency, 4 / 6 times the frequency, and 5 / 6 times the frequency, respectively.

[0017] Extracting the amplitude at at least one predetermined frequency sub-frequency as the amplitude corresponding to the frequency of the real-time segment time includes:

[0018] Extract at least one of the following amplitude values ​​from 1 / 6, 2 / 6, 3 / 6, 4 / 6, and 5 / 6 times the frequency as the amplitude corresponding to the frequency of the real-time segment time.

[0019] Optionally, determining whether to report a malfunction of the injection valve based on the amplitude includes:

[0020] If the amplitude corresponding to 1 / 6 times the frequency exceeds the first frequency threshold, the amplitude corresponding to 2 / 6 times the frequency exceeds the second frequency threshold, the amplitude corresponding to 3 / 6 times the frequency exceeds the third frequency threshold, the amplitude corresponding to 4 / 6 times the frequency exceeds the fourth frequency threshold, and the amplitude corresponding to 5 / 6 times the frequency exceeds the fifth frequency threshold, then an injection valve malfunction is reported.

[0021] Optionally, the first frequency threshold, the second frequency threshold, the third frequency threshold, the fourth frequency threshold, and the fifth frequency threshold are all different values.

[0022] According to another aspect of the present invention, a jet valve fault detection device is provided, the jet valve fault detection device comprising:

[0023] The real-time segment time determination module is used to collect the current injection valve pressure in the engine air rail when the engine is in a steady state, and determine the real-time segment time of the current cylinder based on the current injection valve pressure.

[0024] The injection valve fault detection module is used to extract the amplitude corresponding to the frequency of the real-time segment time, and determine whether to report an injection valve fault based on the amplitude.

[0025] According to another aspect of the present invention, an electronic device is provided, the electronic device comprising:

[0026] At least one processor; and,

[0027] A memory communicatively connected to the at least one processor; wherein,

[0028] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the injection valve fault detection method according to any embodiment of the present invention.

[0029] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the injection valve fault detection method according to any embodiment of the present invention.

[0030] The technical solution of this invention involves acquiring the current injection valve pressure in the engine's air rail when the engine is in a steady-state operating condition, and determining the real-time segment time of the current cylinder based on the current injection valve pressure; extracting the amplitude corresponding to the frequency of the real-time segment time, and determining whether to report an injection valve malfunction based on the amplitude. This invention solves the problem that current injection valve malfunctions lead to differences in injection volume, thus causing engine failure, and that accurate detection of injection valve malfunctions is impossible. It ensures correct injection from the injection valve without relying on hardware improvements, saving costs.

[0031] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying 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 effort.

[0033] Figure 1 This is a flowchart of a jet valve fault detection method provided in Embodiment 1 of the present invention;

[0034] Figure 2 This is a flowchart of a jet valve fault detection method according to Embodiment 2 of the present invention;

[0035] Figure 3This is a schematic diagram of the structure of a jet valve fault detection device according to Embodiment 3 of the present invention;

[0036] Figure 4 This is a schematic diagram of the structure of an electronic device that implements the injection valve fault detection method of this invention. Detailed Implementation

[0037] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0038] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0039] Example 1

[0040] Figure 1 This is a flowchart of a method for detecting injection valve malfunctions according to Embodiment 1 of the present invention. This embodiment is applicable to situations where injection valve malfunctions are detected. This injection valve malfunction detection method can be executed by an injection valve malfunction detection device, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 1 As shown, the injection valve fault detection method includes:

[0041] S110. When the engine is in steady-state operation, the current injection valve pressure in the engine air rail is collected, and the real-time segment time of the current cylinder is determined based on the current injection valve pressure.

[0042] Among them, the commonly used number of cylinders in automobile engines are 3, 4, 5, 6, 8, 10, 12, and 16. For ordinary vehicles, 3, 4, and 6 cylinders are the most common.

[0043] The current injection valve pressure can be obtained, but is not limited to, by a pressure sensor installed on the engine air rail, or by other means. This embodiment does not impose any restrictions on this.

[0044] In this embodiment, the current engine speed of the current engine is obtained, and the number of engine cylinders of the current engine is determined. Based on the current injection valve pressure, the real-time segment time of the current cylinder is determined according to the current engine speed and the number of engine cylinders.

[0045] The segment time is the working interval between two cylinders of the engine. The frequency of the segment time is caused by the pressure wave generated by the stable periodic jet operation. The segment time = engine speed / 60 * number of engine cylinders / 2. In this embodiment, the real-time segment time is = current engine speed / 60 * current number of engine cylinders / 2.

[0046] Based on the current engine's normal operation, the amplitude of the segment time is relatively large at frequencies of 40Hz and 20Hz, while the amplitude of other segment times is relatively small. However, when a certain injection valve in the engine is blocked, significant amplitude changes are observed at frequencies other than 40Hz and 20Hz, including 6.67Hz, 13.33Hz, 26.67Hz, and 33.33Hz. Based on this finding, when an injection valve in the engine is blocked, the periodic injection operation of the segment is disrupted. This results in large frequency components at the harmonics of the segment time's frequency divisions. Taking a six-cylinder engine as an example, large frequency components are generated at the 1 / 6, 2 / 6, 3 / 6, 4 / 6, and 5 / 6 harmonics of the segment time divisions. Therefore, in this embodiment, the abnormal operation of the injection valve can be detected by observing the corresponding amplitude of the segment time.

[0047] S120. Extract the amplitude corresponding to the frequency of the real-time segment time, and determine whether to report a jet valve malfunction based on the amplitude.

[0048] In one embodiment, the amplitude corresponding to the frequency of the real-time segment time is extracted based on the rail pressure spectrum diagram when the injection valve is operating.

[0049] The rail voltage spectrum can be obtained using, but is not limited to, existing signal processing software or methods; this embodiment does not impose any restrictions on this. The rail voltage spectrum uses frequency on the horizontal axis and amplitude on the vertical axis, and the amplitude corresponding to the frequency at the real-time segment time can be extracted based on the rail voltage spectrum.

[0050] For example, the frequency based on the real-time segment time can also be determined by Fourier transform.

[0051] Specifically, based on the number of engine cylinders, multiple set sub-frequency units corresponding to the real-time segment time are determined, and the amplitude at at least one set sub-frequency unit is extracted as the amplitude corresponding to the frequency of the real-time segment time.

[0052] For example, taking a six-cylinder engine as an example, the multiple set sub-frequency values ​​corresponding to the real-time segment time are 1 / 6 times the frequency, 2 / 6 times the frequency, 3 / 6 times the frequency, 4 / 6 times the frequency, and 5 / 6 times the frequency; at least one of the amplitude values ​​of the 1 / 6 times the frequency, 2 / 6 times the frequency, 3 / 6 times the frequency, 4 / 6 times the frequency, and 5 / 6 times the frequency is extracted as the amplitude value corresponding to the frequency of the real-time segment time.

[0053] It is understood that one, two, or more of the corresponding amplitudes from 1 / 6, 2 / 6, 3 / 6, 4 / 6, and 5 / 6 times the frequency can be extracted as the amplitudes corresponding to the frequency of the real-time segment time. Specifically, any one, two, or more can be selected. This embodiment does not impose any restrictions on the number of extractions or the extraction combination method.

[0054] Furthermore, if the amplitude of one of the frequencies of 1 / 6, 2 / 6, 3 / 6, 4 / 6, and 5 / 6 is extracted as the amplitude corresponding to the frequency of the real-time segment time, then if the amplitude corresponding to 1 / 6 frequency exceeds the first frequency threshold, or the amplitude corresponding to 2 / 6 frequency exceeds the second frequency threshold, or the amplitude corresponding to 3 / 6 frequency exceeds the third frequency threshold, or the amplitude corresponding to 4 / 6 frequency exceeds the fourth frequency threshold, or the amplitude corresponding to 5 / 6 frequency exceeds the fifth frequency threshold, then an injection valve malfunction is reported.

[0055] Similarly, if any two corresponding amplitude values ​​from 1 / 6 times the frequency, 2 / 6 times the frequency, 3 / 6 times the frequency, 4 / 6 times the frequency, and 5 / 6 times the frequency are extracted as the amplitude values ​​corresponding to the frequency of the real-time segment time, then if any two values ​​are selected and both are determined to exceed their corresponding frequency thresholds, then an injection valve fault is reported.

[0056] If the amplitude values ​​corresponding to 1 / 6, 2 / 6, 3 / 6, 4 / 6, and 5 / 6 times the frequency are extracted as the amplitude values ​​corresponding to the frequency of the real-time segment time, then it is determined that the amplitude corresponding to 1 / 6 times the frequency exceeds the first frequency threshold, the amplitude corresponding to 2 / 6 times the frequency exceeds the second frequency threshold, the amplitude corresponding to 3 / 6 times the frequency exceeds the third frequency threshold, the amplitude corresponding to 4 / 6 times the frequency exceeds the fourth frequency threshold, and the amplitude corresponding to 5 / 6 times the frequency exceeds the fifth frequency threshold. In other words, if all of them exceed their corresponding frequency thresholds, then an injection valve malfunction is reported.

[0057] It should be noted that regardless of the number of selected set frequencies, all selected set frequencies must exceed the corresponding frequency threshold before an injection valve malfunction is reported; otherwise, no injection valve malfunction will be reported.

[0058] The first frequency threshold, the second frequency threshold, the third frequency threshold, the fourth frequency threshold, and the fifth frequency threshold can all be different values, and the specific values ​​are determined by their corresponding harmonics. This embodiment does not impose any restrictions on this.

[0059] It should also be noted that, taking a six-cylinder engine as an example, the maximum number of set sub-frequency units corresponding to the real-time segment time can be five. For a four-cylinder engine, the maximum number of set sub-frequency units corresponding to the real-time segment time can be three. The number of set sub-frequency units is one less than the number of engine cylinders.

[0060] The technical solution of this invention involves acquiring the current injection valve pressure in the engine's air rail when the engine is in a steady-state operating condition, and determining the real-time segment time of the current cylinder based on the current injection valve pressure; extracting the amplitude corresponding to the frequency of the real-time segment time, and determining whether to report an injection valve malfunction based on the amplitude. This invention solves the problem that current injection valve malfunctions lead to differences in injection volume, thus causing engine failure, and that accurate detection of injection valve malfunctions is impossible. It ensures correct injection from the injection valve without relying on hardware improvements, saving costs.

[0061] Example 2

[0062] Figure 2 This is a flowchart of a method for detecting injection valve faults according to Embodiment 2 of the present invention. Based on the above embodiments, this embodiment takes a six-cylinder engine as an example, and uses the amplitudes corresponding to all frequencies of 1 / 6, 2 / 6, 3 / 6, 4 / 6, and 5 / 6 times the real-time segment time as the amplitudes corresponding to the frequencies, providing an optional implementation method. For example... Figure 2As shown, the injection valve fault detection method includes:

[0063] S210. When the engine is in steady-state operation, collect the current injection valve pressure in the engine air rail.

[0064] S220. Obtain the current engine speed of the current engine and determine the number of engine cylinders of the current engine. Based on the current injection valve pressure, determine the real-time segment time of the current cylinder according to the current engine speed and the number of engine cylinders. The multiple set sub-frequency values ​​corresponding to the real-time segment time are 1 / 6 times the frequency, 2 / 6 times the frequency, 3 / 6 times the frequency, 4 / 6 times the frequency and 5 / 6 times the frequency.

[0065] S230. Extract the amplitudes corresponding to 1 / 6 times the frequency, 2 / 6 times the frequency, 3 / 6 times the frequency, 4 / 6 times the frequency, and 5 / 6 times the frequency as the amplitudes corresponding to the frequencies of the real-time segment time.

[0066] S240. Determine whether the amplitude corresponding to 1 / 6 times the frequency exceeds the first frequency threshold, whether the amplitude corresponding to 2 / 6 times the frequency exceeds the second frequency threshold, whether the amplitude corresponding to 3 / 6 times the frequency exceeds the third frequency threshold, whether the amplitude corresponding to 4 / 6 times the frequency exceeds the fourth frequency threshold, and whether the amplitude corresponding to 5 / 6 times the frequency exceeds the fifth frequency threshold. If yes, proceed to step S250; otherwise, proceed to step S210.

[0067] Understandably, if it is determined that the amplitude corresponding to 1 / 6 times the frequency exceeds the first frequency threshold, the amplitude corresponding to 2 / 6 times the frequency exceeds the second frequency threshold, the amplitude corresponding to 3 / 6 times the frequency exceeds the third frequency threshold, the amplitude corresponding to 4 / 6 times the frequency exceeds the fourth frequency threshold, and the amplitude corresponding to 5 / 6 times the frequency exceeds the fifth frequency threshold, then a malfunction of the injection valve is reported.

[0068] S250, Injection valve malfunction reported.

[0069] The technical solution of this invention, based on the existing engine configuration, without using other equipment, collects the current injection valve pressure in the engine air rail when the engine is in steady-state operation, extracts the amplitude corresponding to the frequency of the real-time segment time, and judges the injection valve malfunction, thereby ensuring the correct injection of the injection valve.

[0070] Example 3

[0071] Figure 3 This is a schematic diagram of the structure of a jet valve fault detection device provided in Embodiment 3 of the present invention. Figure 3 As shown, the injection valve fault detection device includes:

[0072] The real-time segment time determination module 310 is used to collect the current injection valve pressure in the engine air rail when the engine is in a steady state, and determine the real-time segment time of the current cylinder based on the current injection valve pressure.

[0073] The injection valve fault detection module 320 is used to extract the amplitude corresponding to the frequency of the real-time segment time, and determine whether to report an injection valve fault based on the amplitude.

[0074] Optionally, the injection valve fault detection device further includes:

[0075] The engine cylinder number determination module is used to obtain the current engine speed and determine the current engine cylinder number.

[0076] The real-time segment time of the current cylinder is determined based on the current injection valve pressure, specifically for:

[0077] The real-time segment time of the current cylinder is determined based on the current injection valve pressure, the current engine speed, and the number of engine cylinders.

[0078] Optionally, the amplitude corresponding to the frequency of the real-time segment time is extracted, specifically for:

[0079] The amplitude corresponding to the frequency of the real-time segment time is extracted based on the rail pressure spectrum diagram when the injection valve is working.

[0080] Optionally, the amplitude corresponding to the frequency of the real-time segment time is extracted, specifically for:

[0081] Based on the number of engine cylinders, multiple preset sub-frequency units corresponding to the real-time segment time are determined;

[0082] Extract the amplitude at at least one set sub-frequency as the amplitude corresponding to the frequency of the real-time segment time.

[0083] Optionally, the engine has six cylinders, and the multiple set sub-frequency values ​​corresponding to the real-time segment time are 1 / 6 times the frequency, 2 / 6 times the frequency, 3 / 6 times the frequency, 4 / 6 times the frequency, and 5 / 6 times the frequency, respectively.

[0084] Extracting the amplitude at at least one predetermined frequency sub-frequency as the amplitude corresponding to the frequency of the real-time segment time, specifically for:

[0085] Extract at least one of the following amplitude values ​​from 1 / 6, 2 / 6, 3 / 6, 4 / 6, and 5 / 6 times the frequency as the amplitude corresponding to the frequency of the real-time segment time.

[0086] Optionally, the amplitude value is used to determine whether to report a malfunction of the injection valve, specifically for:

[0087] If the amplitude corresponding to 1 / 6 times the frequency exceeds the first frequency threshold, the amplitude corresponding to 2 / 6 times the frequency exceeds the second frequency threshold, the amplitude corresponding to 3 / 6 times the frequency exceeds the third frequency threshold, the amplitude corresponding to 4 / 6 times the frequency exceeds the fourth frequency threshold, and the amplitude corresponding to 5 / 6 times the frequency exceeds the fifth frequency threshold, then an injection valve malfunction is reported.

[0088] Optionally, the first frequency threshold, the second frequency threshold, the third frequency threshold, the fourth frequency threshold, and the fifth frequency threshold are all different values.

[0089] The injection valve fault detection device provided in this embodiment of the invention can execute the injection valve fault detection method provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects for executing the injection valve fault detection method.

[0090] Example 4

[0091] Figure 4 A schematic diagram of an electronic device 410 that can be used to implement embodiments of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0092] like Figure 4As shown, the electronic device 410 includes at least one processor 411 and a memory, such as a read-only memory (ROM 412) or a random access memory (RAM 413), communicatively connected to the at least one processor 411. The memory stores computer programs executable by the at least one processor. The processor 411 can perform various appropriate actions and processes based on the computer program stored in the ROM 412 or loaded from storage unit 418 into the RAM 413. The RAM 413 can also store various programs and data required for the operation of the electronic device 410. The processor 411, ROM 412, and RAM 413 are interconnected via a bus 414. An I / O (input / output) interface 415 is also connected to the bus 414.

[0093] Multiple components in electronic device 410 are connected to I / O interface 415, including: input unit 416, such as keyboard, mouse, etc.; output unit 417, such as various types of displays, speakers, etc.; storage unit 418, such as disk, optical disk, etc.; and communication unit 419, such as network card, modem, wireless transceiver, etc. Communication unit 419 allows electronic device 410 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0094] Processor 411 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 411 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 411 performs the various methods and processes described above, such as the injection valve fault detection method.

[0095] In some embodiments, the injection valve failure detection method may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 418. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 410 via ROM 412 and / or communication unit 419. When the computer program is loaded into RAM 413 and executed by processor 411, one or more steps of the injection valve failure detection method described above may be performed. Alternatively, in other embodiments, processor 411 may be configured to perform the injection valve failure detection method by any other suitable means (e.g., by means of firmware).

[0096] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0097] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0098] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0099] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0100] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0101] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0102] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and no limitation is imposed herein.

[0103] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for detecting a fault in an injection valve, characterized in that, include: When the engine is in steady-state operation, the current injection valve pressure in the engine air rail is collected, and the real-time segment time of the current cylinder is determined based on the current injection valve pressure; wherein, the real-time segment time is the working interval between two cylinders of the engine, and the real-time segment time = current engine speed / 60 × current number of cylinders of the engine / 2. Extract the amplitude corresponding to the frequency of the real-time segment time, and determine whether to report a jet valve malfunction based on the amplitude; The extraction of the amplitude corresponding to the frequency of the real-time segment includes: extracting the amplitude corresponding to the frequency of the real-time segment based on the rail pressure spectrum when the injection valve is working; or, determining multiple set sub-frequencys corresponding to the real-time segment based on the number of engine cylinders; and extracting the amplitude at at least one set sub-frequency as the amplitude corresponding to the frequency of the real-time segment. The engine has six cylinders, and the multiple set sub-frequency values ​​corresponding to the real-time segment time are 1 / 6 times the frequency, 2 / 6 times the frequency, 3 / 6 times the frequency, 4 / 6 times the frequency, and 5 / 6 times the frequency. Extracting the amplitude at at least one set sub-frequency value as the amplitude corresponding to the frequency of the real-time segment time includes: extracting the amplitude corresponding to at least one of the 1 / 6 times, 2 / 6 times, 3 / 6 times, 4 / 6 times, and 5 / 6 times frequencies as the amplitude corresponding to the frequency of the real-time segment time. Determining whether to report an injection valve malfunction based on the amplitude includes: if the amplitude corresponding to 1 / 6 times the frequency exceeds the first frequency threshold, and the amplitude corresponding to 2 / 6 times the frequency exceeds the second frequency threshold, and the amplitude corresponding to 3 / 6 times the frequency exceeds the third frequency threshold, and the amplitude corresponding to 4 / 6 times the frequency exceeds the fourth frequency threshold, and the amplitude corresponding to 5 / 6 times the frequency exceeds the fifth frequency threshold, then an injection valve malfunction is reported.

2. The injection valve fault detection method according to claim 1, characterized in that, The first frequency threshold, the second frequency threshold, the third frequency threshold, the fourth frequency threshold, and the fifth frequency threshold are all different values.

3. A device for detecting a fault in a jet valve, characterized in that, include: The real-time segment time determination module is used to collect the current injection valve pressure in the engine air rail when the engine is in a steady state, and determine the real-time segment time of the current cylinder based on the current injection valve pressure; wherein, the real-time segment time is the working interval between two cylinders of the engine, and the real-time segment time = current engine speed / 60 × current number of cylinders of the engine / 2. The injection valve fault detection module is used to extract the amplitude corresponding to the frequency of the real-time segment time, and determine whether to report an injection valve fault based on the amplitude. Specifically, extracting the amplitude corresponding to the frequency of the real-time segment time is used to: extract the amplitude corresponding to the frequency of the real-time segment time based on the rail pressure spectrum diagram when the injection valve is working; or, determine multiple set sub-frequency units corresponding to the real-time segment time based on the number of engine cylinders; and extract the amplitude at at least one set sub-frequency unit as the amplitude corresponding to the frequency of the real-time segment time. The engine has six cylinders, and the multiple set sub-frequency values ​​corresponding to the real-time segment time are 1 / 6 times the frequency, 2 / 6 times the frequency, 3 / 6 times the frequency, 4 / 6 times the frequency, and 5 / 6 times the frequency. The amplitude at at least one set sub-frequency value is extracted as the amplitude corresponding to the frequency of the real-time segment time. Specifically, this involves extracting the amplitude corresponding to at least one of the 1 / 6 times, 2 / 6 times, 3 / 6 times, 4 / 6 times, and 5 / 6 times frequencies as the amplitude corresponding to the frequency of the real-time segment time. The determination of whether to report a malfunction of the injection valve based on the amplitude is specifically used as follows: if the amplitude corresponding to 1 / 6 times the frequency exceeds the first frequency threshold, the amplitude corresponding to 2 / 6 times the frequency exceeds the second frequency threshold, the amplitude corresponding to 3 / 6 times the frequency exceeds the third frequency threshold, the amplitude corresponding to 4 / 6 times the frequency exceeds the fourth frequency threshold, and the amplitude corresponding to 5 / 6 times the frequency exceeds the fifth frequency threshold, then a malfunction of the injection valve is reported.

4. An electronic device, characterized in that, The electronic device includes: At least one processor; and, A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the injection valve fault detection method according to any one of claims 1-2.

5. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the injection valve fault detection method according to any one of claims 1-2.

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