A detection method and device for a fuel metering unit and an electronic device

Abstract

The application discloses a kind of detection method and device of fuel metering unit, electronic equipment, which comprises: engine shutdown state, sequentially open fuel metering unit according to first preset gradient, and monitor the first actual current value when fuel metering unit is at each first opening degree;For each first opening degree, based on the first actual current value corresponding to the first opening degree and the first preset current value corresponding to the first opening degree pre-stored, determine whether to be stuck;If fuel metering unit is stuck, determine the sticking interval;In sticking interval, sequentially open fuel metering unit according to second preset gradient, for each second opening degree, after opening preset time, the second actual current value corresponding to second opening degree is obtained;If the second actual current value corresponding to each second opening degree is equal to the second preset current value corresponding to the second opening degree pre-stored, then start vehicle.To solve the problem that diesel engine cannot be tested during operation without starting the vehicle.

Description

Technical Field

[0001] This invention relates to the field of engine electronic control technology, and in particular to a method and device for detecting a fuel metering unit, and electronic equipment. Background Technology

[0002] Large-bore, high-pressure common rail diesel engines have high power output and fuel consumption, and numerous electronic control components, making fault diagnosis and timely maintenance difficult. Furthermore, diesel engines operate in diverse environments; salt spray and humidity can affect the reliability of electronic control components and reduce the engine's lifespan. In humid environments, malfunctions in the electronic control components of standby units that are not used year-round can lead to startup failure or power generation failure, causing losses for customers.

[0003] The fuel metering unit is an electronically controlled component in a diesel engine. The vehicle controller adjusts the current flowing through the fuel metering unit to adapt to different operating conditions. Currently, electronically controlled diesel engines determine whether the power supply to the fuel metering unit is abnormal by detecting its voltage. If the rail voltage is too high and the high-pressure safety valve is opened, it indicates a malfunction of the fuel metering unit. It is impossible to inspect the fuel metering unit while the diesel engine is running and the vehicle is not in operation. Summary of the Invention

[0004] The purpose of this application is to provide a method, apparatus, and electronic device for testing a fuel metering unit. This addresses the problem that existing diesel engines cannot test the fuel metering unit while the vehicle is not running.

[0005] In a first aspect, embodiments of this application provide a method for detecting a fuel metering unit, the method comprising:

[0006] If a detection command is received while the engine is in a stopped state, the fuel metering unit is turned on sequentially according to the first opening degree of the first preset gradient, and the first actual current value of the fuel metering unit at each first opening degree is monitored.

[0007] For each first opening degree, based on the first actual current value corresponding to the first opening degree and the pre-stored first preset current value corresponding to the first opening degree, it is determined whether the fuel metering unit is stuck.

[0008] If the fuel metering unit is stuck, the first opening degree corresponding to the time the fuel metering unit is stuck is taken as the target opening degree, and the stuck interval is determined. The stuck interval is the opening degree interval from the initial opening degree of the first opening degree sequence to the target opening degree.

[0009] Within the stuck range, the fuel metering unit is turned on sequentially according to the second opening degree of the second preset gradient. For each second opening degree, after a preset time has elapsed since the fuel metering unit was turned on, the second actual current value corresponding to the second opening degree is obtained.

[0010] If the second actual current value corresponding to each second opening degree is equal to the pre-stored second preset current value corresponding to the second opening degree, then start the vehicle;

[0011] Wherein, the second preset gradient is less than the first preset gradient.

[0012] In some possible embodiments, determining whether the fuel metering unit is stuck based on the first actual current value corresponding to the first opening degree and the pre-stored first preset current value corresponding to the first opening degree includes:

[0013] Based on the preset correspondence between opening degree and current, the first preset current value corresponding to the first opening degree is determined;

[0014] If the difference between the first actual current value and the first preset current value is greater than the current threshold, it is determined that the fuel metering unit is stuck.

[0015] In some possible embodiments, the method further includes:

[0016] If the fuel metering unit is stuck, the cumulative number of times the fuel metering unit is stuck is incremented by 1;

[0017] When the cumulative number of jamming events exceeds the jamming threshold, a prompt will be made to replace the fuel metering unit.

[0018] In some possible embodiments, after obtaining the second actual current value corresponding to the second opening degree, the method further includes:

[0019] If there is a stuck opening in the second opening, the fuel metering unit is prompted to be replaced; the difference between the third actual current value corresponding to the stuck opening and the third preset current value corresponding to the stuck opening is greater than the current threshold.

[0020] In some possible embodiments, the opening degrees of the first preset gradient are sorted from small to large, with each adjacent two opening degrees differing by 25%; the opening degrees of the second preset gradient are sorted from small to large, with each adjacent two opening degrees differing by 5%.

[0021] In some possible embodiments, the preset time is 5 minutes.

[0022] In some possible embodiments, after monitoring the first actual current value of the fuel metering unit at each first opening degree, and before determining whether the fuel metering unit is stuck for each first opening degree based on the first actual current value corresponding to the first opening degree and a pre-stored first preset current value corresponding to the first opening degree, the method further includes:

[0023] Determine the correction factor for the first actual current value based on the ambient temperature, and determine the first actual current correction value by multiplying the correction factor by the first actual current value.

[0024] The step of determining whether the fuel metering unit is stuck based on the first actual current value corresponding to the first opening degree and the pre-stored first preset current value corresponding to the first opening degree includes:

[0025] Based on the first actual current correction value and the first preset current value, it is determined whether the fuel metering unit is stuck.

[0026] Secondly, embodiments of this application provide a detection device for a fuel metering unit, the device comprising:

[0027] First activation module: If a detection command is received when the engine is in a stopped state, the fuel metering unit is activated sequentially according to the first opening degree of the first preset gradient, and the first actual current value of the fuel metering unit at each first opening degree is monitored.

[0028] The jamming determination module is used to determine whether the fuel metering unit is jammed for each first opening degree based on the first actual current value corresponding to the first opening degree and the pre-stored first preset current value corresponding to the first opening degree.

[0029] The target opening module is used to determine the first opening corresponding to the fuel metering unit when it is stuck, and to determine the stuck interval if the fuel metering unit is stuck. The stuck interval is the opening interval from the initial opening in the first opening sequence to the target opening.

[0030] The second opening module is used to sequentially open the fuel metering unit in the second opening order according to the second preset gradient within the stuck range. For each second opening, after a preset time for opening the fuel metering unit, the second actual current value corresponding to the second opening is obtained.

[0031] The vehicle startup module is used to start the vehicle if the second actual current value corresponding to each second opening degree is equal to the pre-stored second preset current value corresponding to the second opening degree.

[0032] Wherein, the second preset gradient is less than the first preset gradient.

[0033] Thirdly, embodiments of this application provide an electronic device, including at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform the detection method for the fuel metering unit provided in the first aspect above.

[0034] Fourthly, embodiments of this application provide a computer storage medium storing a computer program for causing a computer to execute the detection method for the fuel metering unit provided in the first aspect.

[0035] This application embodiment addresses the problem of not being able to inspect the fuel metering unit while the vehicle is not running during diesel engine operation. Specifically, it improves the reliability of the fuel metering unit and ensures engine performance in large-bore high-pressure common rail diesel engines used in high-humidity areas. The fuel metering unit is periodically inspected when the engine is off. Different opening degrees and currents are used to determine if the fuel metering unit is stuck. If sticking occurs, forced energizing for a preset time to remove moisture from the coil restores normal operation, thus extending the overall machine lifespan and reducing component failures.

[0036] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings. Attached Figure Description

[0037] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic flowchart of a method for detecting a fuel metering unit according to an embodiment of this application;

[0039] Figure 2 This is a detailed flowchart illustrating the detection process of a fuel metering unit according to an embodiment of this application;

[0040] Figure 3 This is a schematic diagram of the detection device for a fuel metering unit according to an embodiment of this application;

[0041] Figure 4 This is a schematic diagram of an electronic device structure according to an embodiment of this application. Detailed Implementation

[0042] The technical solutions in the embodiments of this application will be clearly and thoroughly described below with reference to the accompanying drawings. In the description of the embodiments of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in the text is merely a description of the relationship between related objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more.

[0043] In the description of the embodiments of this application, unless otherwise stated, the term "multiple" refers to two or more, and other quantifiers are similarly understood. The preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application. Furthermore, the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0044] To further illustrate the technical solutions provided in the embodiments of this application, a detailed description is provided below in conjunction with the accompanying drawings and specific implementation methods. Although the embodiments of this application provide method operation steps as shown in the following embodiments or drawings, more or fewer operation steps may be included in the method based on conventional or non-inventive effort. For steps that do not logically have a necessary causal relationship, the execution order of these steps is not limited to the execution order provided in the embodiments of this application. In actual processing or when the control device executes the method, it may be executed sequentially or in parallel according to the method shown in the embodiments or drawings.

[0045] In view of the problem in related technologies that the fuel metering unit cannot be inspected during diesel engine operation without the vehicle being started, this application proposes a method, device, and electronic equipment for detecting the fuel metering unit, thereby improving the service life of the entire machine and reducing component failures.

[0046] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0047] The detection method for the fuel metering unit in the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0048] See Figure 1 A schematic flowchart of a method for detecting a fuel metering unit according to an embodiment of this application is shown, including:

[0049] Step 101: If a detection command is received when the engine is in a stopped state, the fuel metering unit is turned on sequentially according to the first opening degree sequence of the first preset gradient, and the first actual current value of the fuel metering unit at each first opening degree is monitored.

[0050] Specifically, the fuel metering unit is controlled by the vehicle controller. The controller controls the current flowing through the fuel metering unit, which in turn controls the coil's attraction to the iron core, thus controlling the fuel flow rate to adapt to different operating conditions. This application provides a method for detecting the fuel metering unit when the engine is stopped. The first preset gradient refers to a pre-set opening gradient. As an optional implementation, the opening degrees of the first preset gradient are ordered from smallest to largest, with each adjacent opening degree differing by 25%. For example, the opening degree sequence of the first preset gradient is 25%, 50%, and 75%. That is, first, the fuel metering unit is controlled at 25% opening, then at 50% opening, and then at 75% opening. The first actual current value corresponding to each opening degree of the fuel metering unit is monitored sequentially.

[0051] Step 102: For each first opening degree, determine whether the fuel metering unit is stuck based on the first actual current value corresponding to the first opening degree and the first preset current value corresponding to the first opening degree.

[0052] As an optional implementation, a first preset current value corresponding to the first opening degree is determined based on a preset correspondence between the opening degree and the current; if the difference between the first actual current value and the first preset current value is greater than the current threshold, it is determined that the fuel metering unit is stuck.

[0053] Specifically, a pre-defined correspondence between opening degree and current is established. For example, a 25% opening degree corresponds to a 2A current, meaning the first preset current value at a 25% opening degree is 2A. First, the difference between the actual current value at a 25% opening degree and the first preset current value is determined. Then, it is checked whether the difference is within a preset current threshold. If the difference is greater than the current threshold, it indicates that the fuel metering unit is stuck. The current threshold is the fluctuation value of the difference between the pre-set actual current and the preset current.

[0054] As an optional implementation, if the fuel metering unit becomes stuck, the cumulative number of times the fuel metering unit becomes stuck is incremented by 1; when the cumulative number of times the sticking unit becomes stuck exceeds the sticking threshold, the system prompts the user to replace the fuel metering unit.

[0055] If the fuel metering unit gets stuck during the detection process, the number of stuck times is accumulated and incremented by 1. When the accumulated number of stuck times reaches the preset stuck time threshold, the system will prompt the user to replace the fuel metering unit.

[0056] If the fuel metering unit is determined to be free of obstruction, the system can be started normally. However, if, after starting the system, high oil temperature in the high-pressure return circuit of the fuel pump, abnormally high rail pressure, and valve failure still occur during operation, it is determined that the mechanical part of the fuel metering unit is stuck, and the user is advised to replace the fuel metering unit directly.

[0057] Step 103: If the fuel metering unit is stuck, the first opening degree corresponding to the time of the fuel metering unit being stuck is taken as the target opening degree, and the stuck interval is determined. The stuck interval is the opening degree interval from the initial opening degree in the first opening degree sequence to the target opening degree.

[0058] Specifically, in step 102 above, when the fuel metering unit is stuck, the first opening is 50%, and the target opening is 50%. The initial opening is known to be 25%, meaning the stuck range is 25%-50%.

[0059] Step 104: Within the stuck range, the fuel metering units are turned on sequentially according to the second opening degree of the second preset gradient. For each second opening degree, after a preset time for turning on the fuel metering unit, the second actual current value corresponding to the second opening degree is obtained.

[0060] Specifically, the second preset gradient refers to a pre-set opening gradient. As an optional implementation, the openings of the second preset gradient are ordered from smallest to largest, with each adjacent opening differing by 5%, and the second preset gradient is smaller than the first preset gradient. In step 103 above, for example, if the stagnation range is 25%-50%, then the opening order of the second preset gradient is 25%, 30%, 35%, 40%, 45%, 50%. The fuel metering units are activated sequentially according to the opening order of the second preset gradient to resolve the jamming. The purpose of activating the fuel metering units for a preset time is to force-energize them for that preset period and determine if the jamming problem is resolved. It should be noted that setting the second preset gradient to be smaller than the first preset gradient aims to more accurately resolve the jamming problem. For example, if the jamming opening detected in step 102 is 50%, it indicates that the jamming occurs within the 25%-50% jamming range. The jamming could occur at any opening within the 25%-50% range, including 50% and 30%. Therefore, setting the second preset gradient to be smaller than the first preset gradient allows for more precise detection of the specific opening within the jamming range where the jamming occurred. As an optional implementation, the preset time is 5 minutes. If the second actual current value corresponding to each second opening is equal to the pre-stored second preset current value corresponding to the second opening, the vehicle is started.

[0061] Specifically, if the second actual current value corresponding to the second opening degree is equal to the second preset current value after five minutes of power-on, it proves that the jam has been resolved and the vehicle can be started.

[0062] As an optional implementation, after obtaining the second actual current value corresponding to the second opening degree, the method further includes: if there is a stuck opening degree in the second opening degree, prompting to replace the fuel metering unit; the difference between the third actual current value corresponding to the stuck opening degree and the third preset current value corresponding to the stuck opening degree is greater than the current threshold.

[0063] Specifically, if the difference between the third actual current value and the third preset current value corresponding to the sticking opening is greater than the current threshold, it proves that the sticking problem has not been resolved after the preset time of forced power-on. At this time, it is necessary to prompt the replacement of the fuel metering unit.

[0064] As an optional implementation, after monitoring the first actual current value of the fuel metering unit at each first opening degree, and before determining whether the fuel metering unit is stuck based on the first actual current value corresponding to the first opening degree and the pre-stored first preset current value corresponding to the first opening degree for each first opening degree, the method further includes: determining a correction coefficient for the first actual current value based on the ambient temperature, and determining a first actual current correction value by multiplying the correction coefficient by the first actual current value; the step of determining whether the fuel metering unit is stuck based on the first actual current value corresponding to the first opening degree and the pre-stored first preset current value corresponding to the first opening degree includes: determining whether the fuel metering unit is stuck based on the first actual current correction value and the first preset current value.

[0065] Specifically, because ambient temperature affects the resistance of the fuel metering unit, the current of fuel metering units with the same opening degree will differ, requiring correction. The product of a preset correction coefficient and the first actual current value is the corrected first actual current value. The corrected first actual current value is more accurate, leading to a more precise determination of whether the subsequent fuel metering unit is stuck.

[0066] Step 105: If the second actual current value corresponding to each second opening degree is equal to the second preset current value corresponding to the pre-stored second opening degree, then start the vehicle.

[0067] Specifically, when the second actual current value corresponding to each second opening degree within the stuck interval is equal to the second preset current value corresponding to the pre-stored second opening degree, it proves that the stuck problem of the fuel metering unit has been solved after the forced power-on for the preset time, and the vehicle can then be started.

[0068] This application addresses the issue of improving the reliability of the fuel metering unit in large-bore high-pressure common rail diesel engines used in high-humidity areas, thereby ensuring engine performance. The fuel metering unit is periodically inspected when the engine is off. Different opening degrees and currents are used to determine if the fuel metering unit is stuck. If sticking occurs, forced energizing for a preset time to remove moisture from the coil will restore normal operation, thus extending the overall engine lifespan and reducing component failures.

[0069] See Figure 2 This is a detailed flowchart of the testing of the fuel metering unit in this application.

[0070] Step 201: If a detection command is received when the engine is in a stopped state, the fuel metering unit is turned on sequentially according to the first opening degree sequence of the first preset gradient, and the first actual current value of the fuel metering unit at each first opening degree is monitored.

[0071] Step 202: Determine the correction factor for the ambient temperature on the first actual current value, and determine the correction value of the first actual current by multiplying the correction factor by the first actual current value.

[0072] Step 203: Based on the preset correspondence between opening degree and current, determine the first preset current value corresponding to the first opening degree.

[0073] Step 204: Determine whether the difference between the first actual current correction value and the first preset current value is greater than the current threshold. If yes, proceed to step 205; otherwise, proceed to step 209.

[0074] Step 205: If the fuel metering unit is stuck, take the first opening degree corresponding to the time the fuel metering unit is stuck as the target opening degree, determine the stuck interval, and increment the cumulative number of stuck times of the fuel metering unit by 1.

[0075] Step 206: Determine whether the cumulative number of stuck times is greater than the stuck threshold. If yes, proceed to step 210; otherwise, proceed to step 207.

[0076] Step 207: Within the stuck range, the fuel metering units are turned on sequentially according to the second opening degree of the second preset gradient. For each second opening degree, after a preset time for turning on the fuel metering unit, the second actual current value corresponding to the second opening degree is obtained.

[0077] Step 208: Determine if there is a stuck opening in the second opening. If yes, proceed to step 210; otherwise, proceed to step 209.

[0078] Step 209: Start the vehicle.

[0079] Step 210: Prompt to replace the fuel metering unit.

[0080] Example 2

[0081] Based on the same inventive concept, this application also provides a detection device for a fuel metering unit, such as... Figure 3 As shown, the device includes:

[0082] First opening module 301: If a detection command is received when the engine is in a stopped state, the fuel metering unit is opened sequentially according to the first opening degree sequence of the first preset gradient, and the first actual current value of the fuel metering unit at each first opening degree is monitored.

[0083] The jamming determination module 302 is used to determine whether the fuel metering unit is jammed for each first opening degree based on the first actual current value corresponding to the first opening degree and the pre-stored first preset current value corresponding to the first opening degree.

[0084] The target opening module 303 is used to determine the first opening corresponding to the fuel metering unit when it is stuck as the target opening if the fuel metering unit is stuck, and to determine the stuck interval, wherein the stuck interval is the opening interval from the initial opening of the first opening sequence to the target opening.

[0085] The second opening module 304 is used to sequentially open the fuel metering unit in the second opening order of the second preset gradient within the stuck interval, and to obtain the second actual current value corresponding to the second opening after a preset time for each second opening for each fuel metering unit.

[0086] The vehicle startup module 305 is used to start the vehicle if the second actual current value corresponding to each second opening degree is equal to the pre-stored second preset current value corresponding to the second opening degree.

[0087] Wherein, the second preset gradient is less than the first preset gradient.

[0088] Optionally, the module 302 for determining whether the fuel metering unit is stuck is specifically used to determine a first preset current value corresponding to the first opening degree based on a preset correspondence between the opening degree and the current; if the difference between the first actual current value and the first preset current value is greater than the current threshold, the fuel metering unit is determined to be stuck.

[0089] Optionally, the jamming determination module 302 is further configured to: if the fuel metering unit is jammed, increment the cumulative number of jams of the fuel metering unit by 1; when the cumulative number of jams is greater than the jamming threshold, prompt the user to replace the fuel metering unit.

[0090] Optionally, the second opening module 304 is further configured to prompt the replacement of the fuel metering unit if there is a stuck opening in the second opening; the difference between the third actual current value corresponding to the stuck opening and the third preset current value corresponding to the stuck opening is greater than the current threshold.

[0091] Optionally, the openings of the first preset gradient are sorted from smallest to largest, with each adjacent opening differing by 25%; the openings of the second preset gradient are sorted from smallest to largest, with each adjacent opening differing by 5%.

[0092] Optionally, the preset time is 5 minutes.

[0093] Optionally, the jamming determination module 302 is further configured to determine the correction coefficient of the ambient temperature on the first actual current value, determine the first actual current correction value by multiplying the correction coefficient by the first actual current value, and determine whether the fuel metering unit is jammed based on the first actual current correction value and the first preset current value.

[0094] Having described the method and apparatus for detecting a fuel metering unit according to exemplary embodiments of this application, we will now describe an electronic device according to another exemplary embodiment of this application.

[0095] Those skilled in the art will understand that various aspects of this application can be implemented as a system, method, or program product. Therefore, various aspects of this application can be specifically implemented in the following forms: a completely hardware implementation, a completely software implementation (including firmware, microcode, etc.), or a combination of hardware and software implementations, collectively referred to herein as a "circuit," "module," or "system."

[0096] In some possible implementations, the electronic device according to this application may include at least one processor and at least one memory. The memory stores program code that, when executed by the processor, causes the processor to perform the steps in the detection method for the fuel metering unit according to the various exemplary embodiments of this application described above.

[0097] The following reference Figure 4 To describe the electronic device 130 according to this embodiment of the present application, namely the detection device for the fuel metering unit described above. Figure 4 The electronic device 130 shown is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0098] like Figure 4 As shown, the electronic device 130 is presented in the form of a general-purpose electronic device. The components of the electronic device 130 may include, but are not limited to: at least one processor 131, at least one memory 132, and a bus 133 connecting different system components (including memory 132 and processor 131).

[0099] Bus 133 represents one or more of several bus structures, including a memory bus or memory controller, peripheral bus, processor, or local bus using any of the various bus structures.

[0100] The memory 132 may include a readable medium in the form of volatile memory, such as random access memory (RAM) 1321 and / or cache memory 1322, and may further include read-only memory (ROM) 1323.

[0101] The memory 132 may also include a program / utility 1325 having a set (at least one) of program modules 1324, including but not limited to: an operating system, one or more application programs, other program modules, and program data, each or some combination of these examples may include an implementation of a network environment.

[0102] Electronic device 130 can also communicate with one or more external devices 134 (e.g., keyboard, pointing device, etc.), and with one or more devices that enable a user to interact with electronic device 130, and / or with any device that enables electronic device 130 to communicate with one or more other electronic devices (e.g., router, modem, etc.). This communication can be performed via input / output (I / O) interface 135. Furthermore, electronic device 130 can also communicate with one or more networks (e.g., local area network (LAN), wide area network (WAN), and / or public networks, such as the Internet) via network adapter 136. As shown, network adapter 136 communicates with other modules used in electronic device 130 via bus 133. It should be understood that, although not shown in the figures, other hardware and / or software modules can be used in conjunction with electronic device 130, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID systems, tape drives, and data backup storage systems.

[0103] In some possible implementations, various aspects of the method for detecting a fuel metering unit provided in this application can also be implemented in the form of a program product, which includes program code. When the program product is run on a computer device, the program code is used to cause the computer device to perform the steps of the method for detecting a fuel metering unit according to various exemplary embodiments of this application described above.

[0104] The program product may employ any combination of one or more readable media. A readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of readable storage media include: electrical connections having one or more wires, portable disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0105] The monitoring program product of the embodiments of this application may employ a portable compact disc read-only memory (CD-ROM) and include program code, and may run on an electronic device. However, the program product of this application is not limited thereto. In this document, the readable storage medium may be any tangible medium that contains or stores a program that may be used by or in conjunction with an instruction execution system, apparatus, or device.

[0106] A readable signal medium may include a data signal propagated in baseband or as part of a carrier wave, carrying readable program code. This propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A readable signal medium may also be any readable medium other than a readable storage medium, capable of sending, propagating, or transmitting a program for use by or in conjunction with an instruction execution system, apparatus, or device.

[0107] The program code contained on the readable medium may be transmitted using any suitable medium, including but not limited to wireless, wired, optical fiber, RF, etc., or any suitable combination thereof.

[0108] Program code for performing the operations of this application can be written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Java and C++, and conventional procedural programming languages ​​such as C or similar languages. The program code can execute entirely on the user's electronic device, partially on the user's device, as a standalone software package, partially on the user's electronic device and partially on a remote electronic device, or entirely on a remote electronic device or server. In cases involving remote electronic devices, the remote electronic device can be connected to the user's electronic device via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external electronic device (e.g., via the Internet using an Internet service provider).

[0109] It should be noted that although several units or sub-units of the device have been mentioned in the detailed description above, this division is merely exemplary and not mandatory. In fact, according to embodiments of this application, the features and functions of two or more units described above can be embodied in one unit. Conversely, the features and functions of one unit described above can be further divided and embodied by multiple units.

[0110] Furthermore, although the operations of the method of this application are described in a specific order in the accompanying drawings, this does not require or imply that these operations must be performed in that specific order, or that all the operations shown must be performed to achieve the desired result. Additionally or alternatively, certain steps may be omitted, multiple steps may be combined into one step, and / or one step may be broken down into multiple steps.

[0111] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0112] This application is described with reference to flowchart illustrations and block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block and / or block in the flowchart illustrations and block diagrams, as well as combinations of blocks and processes in the flowchart illustrations and block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the process. Figure 1 One or more processes and boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0113] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and boxes Figure 1 The function specified in one or more boxes.

[0114] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and boxes Figure 1 The steps of the function specified in one or more boxes.

[0115] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0116] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for detecting a fuel metering unit, characterized in that, The method includes: If a detection command is received while the engine is in a stopped state, the fuel metering unit is turned on sequentially according to the first opening degree of the first preset gradient, and the first actual current value of the fuel metering unit at each first opening degree is monitored. Determine the correction factor for the first actual current value based on the ambient temperature, and determine the first actual current correction value by multiplying the correction factor by the first actual current value. For each first opening degree, based on the preset correspondence between opening degree and current, a first preset current value corresponding to the first opening degree is determined; if the difference between the first actual current correction value and the first preset current value is greater than the current threshold, it is determined that the fuel metering unit is stuck. If it is determined that the fuel metering unit is not stuck, the user is prompted that the engine can be started normally; if after the engine is started, the fuel pump high pressure return oil temperature is high, the rail pressure rises abnormally, and the valve is flushed, it is determined that the mechanical part of the fuel metering unit is stuck, and the user is prompted to replace the fuel metering unit. If the fuel metering unit becomes stuck, the cumulative number of times the fuel metering unit becomes stuck is incremented by 1; when the cumulative number of times the fuel metering unit becomes stuck exceeds the stuck threshold, the system prompts the user to replace the fuel metering unit. If the fuel metering unit is stuck, the first opening degree corresponding to the time the fuel metering unit is stuck is taken as the target opening degree, and the stuck interval is determined. The stuck interval is the opening degree interval from the initial opening degree of the first opening degree sequence to the target opening degree. Within the stuck range, the fuel metering unit is turned on sequentially according to the second opening degree of the second preset gradient. For each second opening degree, after a preset time has elapsed since the fuel metering unit was turned on, the second actual current value corresponding to the second opening degree is obtained. If there is a stuck opening in the second opening, the fuel metering unit is prompted to be replaced; the difference between the third actual current value corresponding to the stuck opening and the third preset current value corresponding to the stuck opening is greater than the current threshold. If the second actual current value corresponding to each second opening degree is equal to the pre-stored second preset current value corresponding to the second opening degree, then start the vehicle; Wherein, the second preset gradient is less than the first preset gradient.

2. The method according to claim 1, characterized in that, The opening of the first preset gradient is sorted from small to large, with each two adjacent openings differing by 25%; the opening of the second preset gradient is sorted from small to large, with each two adjacent openings differing by 5%.

3. The method according to claim 1, characterized in that, The preset time is 5 minutes.

4. A detection device for a fuel metering unit, characterized in that, The device includes: First activation module: If a detection command is received when the engine is in a stopped state, the fuel metering unit is activated sequentially according to the first opening degree of the first preset gradient, and the first actual current value of the fuel metering unit at each first opening degree is monitored. The module for determining whether the fuel metering unit is stuck is used to determine the correction coefficient of the ambient temperature on the first actual current value, and to determine the first actual current correction value by multiplying the correction coefficient by the first actual current value; for each first opening degree, based on a preset correspondence between opening degree and current, a first preset current value corresponding to the first opening degree is determined; if the difference between the first actual current correction value and the first preset current value is greater than a current threshold, the fuel metering unit is determined to be stuck; if the fuel metering unit is stuck, the number of times the fuel metering unit is stuck is incremented by 1; when the accumulated number of times the fuel metering unit is stuck is greater than the stuck threshold, the fuel metering unit is prompted to be replaced; The target opening module is used to determine the first opening corresponding to the fuel metering unit when it is stuck, and to determine the stuck interval if the fuel metering unit is stuck. The stuck interval is the opening interval from the initial opening in the first opening sequence to the target opening. The second activation module is used to sequentially activate the fuel metering unit according to the second opening degree sequence of the second preset gradient within the stuck interval. For each second opening degree, after activating the fuel metering unit for a preset time, the module obtains the second actual current value corresponding to the second opening degree. If there is a stuck opening degree among the second opening degrees, the module prompts to replace the fuel metering unit. The difference between the third actual current value corresponding to the stuck opening degree and the third preset current value corresponding to the stuck opening degree is greater than the current threshold. The vehicle startup module is used to start the vehicle if the second actual current value corresponding to each second opening degree is equal to the pre-stored second preset current value corresponding to the second opening degree. The device is also used to: if it is determined that the fuel metering unit is not stuck, then prompt the user that the engine can be started normally; if after the engine is started, the fuel pump high pressure return oil temperature is high, the rail pressure rises abnormally, and the valve is flushed, then it is determined that the mechanical part of the fuel metering unit is stuck, and the user is prompted to replace the fuel metering unit. Wherein, the second preset gradient is less than the first preset gradient.

5. An electronic device, characterized in that, The method includes at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method as described in any one of claims 1-3.

6. A computer storage medium, characterized in that, The computer storage medium stores a computer program that enables the computer to perform the method as described in any one of claims 1-3.

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