Maintenance method and equipment for engine fuel filter and medium

Abstract

The invention discloses a maintenance method and equipment for an engine fuel filter and a medium. The method comprises the steps that a fuel coarse filter and a fuel fine filter of the fuel filter are determined, a first pressure difference corresponding to the fuel coarse filter and a second pressure difference corresponding to the fuel fine filter are determined, and the filter pressure difference is determined according to the first pressure difference and the second pressure difference; the fuel injection quantity of the engine is determined, and the fuel flow of the engine is determined according to the fuel injection quantity; and fitting the use duration of the fuel filter, the filter pressure difference and the fuel flow to obtain a fuel filter flow resistance curve, determining the residual duration according to the fuel filter flow resistance curve, and performing early warning and maintenance on the fuel filter according to the residual duration. The coarse filter and the fine filter are accurately positioned, the pressure difference is calculated, the fuel flow is obtained by combining the fuel injection quantity, the residual duration is determined by fitting the flow resistance curve, scientific early warning and maintenance can be achieved, filter faults are effectively avoided, the engine performance is guaranteed, and the service life of the engine is prolonged.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to a maintenance method, equipment, and medium for an engine fuel filter. Background Art

[0002] Fuel filters filter impurities from fuel, ensuring long-term, reliable engine operation. As a consumable item that requires regular replacement, untimely replacement can impact engine performance and even cause premature shutdown. The replacement cycle is affected by daily fuel refueling, the cleanliness of fuel storage containers, and fuel lines. Current filter maintenance programs on the market only analyze filter differential pressure at a constant flow rate. When engine speed or fuel consumption fluctuate, causing changes in fuel flow, differential pressure data can interfere with analysis results. Furthermore, long-term filter life predictions based on low-load operating conditions are not applicable to high-load conditions. This is because increasing engine load and flow increases filter resistance, which can impact stable engine operation. Summary of the Invention

[0003] In order to solve the above problems, the present application proposes a maintenance method for an engine fuel filter, including: determining a coarse fuel filter and a fine fuel filter of a fuel filter, and determining a first pressure difference corresponding to the coarse fuel filter and a second pressure difference corresponding to the fine fuel filter, and determining a filter pressure difference based on the first pressure difference and the second pressure difference; determining an engine fuel injection amount, and determining a fuel flow rate of the engine based on the fuel injection amount; fitting the usage time of the fuel filter, the filter pressure difference and the fuel flow rate to obtain a fuel-filter flow resistance curve, determining a remaining time based on the fuel-filter flow resistance curve, and performing early warning and maintenance on the fuel filter based on the remaining time.

[0004] In one example, fitting the usage time of the fuel filter, the filter pressure difference, and the fuel flow rate to obtain a fuel-filter flow resistance curve specifically includes: determining a plurality of preset usage time periods and fitting the filter pressure difference and the fuel flow rate corresponding to the plurality of usage time periods to obtain a plurality of first fuel-filter flow resistance curves corresponding to the plurality of usage time periods; determining a plurality of preset flow values ​​and fitting the filter pressure difference and the usage time corresponding to the plurality of flow values ​​to obtain a plurality of second fuel-filter flow resistance curves corresponding to the plurality of flow values; and fitting the plurality of first fuel-filter flow resistance curves with the plurality of second fuel-filter flow resistance curves to obtain the fuel-filter flow resistance curve.

[0005] In one example, determining the remaining time based on the fuel-filter flow resistance curve specifically includes: determining initial settings of the engine, the initial settings including a maximum filter pressure difference, and determining a current fuel flow rate of the engine; substituting the maximum filter pressure difference and the fuel flow rate into the fuel-filter flow resistance curve to obtain an allowable time corresponding to the current fuel flow rate; and determining an operating time of the engine, and determining the remaining time based on the operating time and the allowable time.

[0006] In one example, the fuel filter is warned and maintained based on the remaining time, specifically including: determining the maximum fuel flow of the engine, determining the limit remaining time of the engine based on the maximum fuel flow and the maximum filter pressure difference, and comprehensively comparing the remaining time with the limit remaining time; if the limit remaining time is greater than zero, and the remaining time is greater than zero, the limit remaining time and the remaining time are displayed through a pre-set instrument; if the limit remaining time is less than zero, and the remaining time is greater than zero, the remaining time is displayed through the instrument, and a first warning message is issued, the first warning message being that the fuel filter does not support the engine to operate at maximum power, and it is recommended to replace the fuel filter in time; if the limit remaining time is less than zero, and the remaining time is less than zero, a second warning message is issued through the instrument, the second warning message being that the fuel filter should be replaced immediately.

[0007] In one example, the method further includes: monitoring the engine through a pre-set electronic control unit to obtain sensor data of the engine, determining the operating status of the engine based on the sensor data, and determining the operating time of the engine based on the operating status.

[0008] In one example, monitoring the engine through a pre-set electronic control unit specifically includes: determining a pre-set common rail pipe and a rail pressure sensor provided on the common rail pipe, acquiring sensor data through the rail pressure sensor, and sending the sensor data to the electronic control unit.

[0009] In one example, determining the fuel flow rate of the engine based on the fuel injection amount specifically includes: determining the injector and the fuel injection pump of the fuel filter, determining the rail pressure and power-on duration of the injector through a preset electronic control unit, and determining the fuel injection amount of the injector based on the rail pressure and the power-on duration; determining the return oil amount of the injector and the return oil amount of the fuel injection pump, and calculating based on the injection amount of the injector, the return oil amount of the injector, and the return oil amount of the fuel injection pump to obtain the fuel flow rate.

[0010] In one example, determining a first pressure difference corresponding to the primary fuel filter and a second pressure difference corresponding to the secondary fuel filter specifically includes: determining a first pressure sensor group at front and rear ends of the primary fuel filter, and determining the first pressure difference at the front and rear ends of the primary fuel filter based on the first pressure sensor group; determining a second pressure sensor group at front and rear ends of the secondary fuel filter, and determining the second pressure difference at the front and rear ends of the secondary fuel filter based on the second pressure sensor group.

[0011] On the other hand, the present application also proposes a maintenance device for an engine fuel filter, comprising: 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, and the instructions are executed by the at least one processor to enable the maintenance device for the engine fuel filter to execute: a method as described in any one of the above examples.

[0012] On the other hand, the present application also proposes a non-volatile computer storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to perform the method described in any one of the above examples.

[0013] This application determines the pressure differential between the primary and secondary fuel filters, thereby obtaining the filter pressure differential. This, combined with the engine's fuel injection volume, accurately calculates fuel flow, providing a precise data foundation for subsequent analysis and more accurately reflecting the fuel filter's operating status. Using a multi-stage fitting approach, the application first generates first and second fuel-filter flow resistance curves corresponding to different operating periods and flow rates. This then comprehensively fits the fuel-filter flow resistance curve, comprehensively considering the relationship between operating time, pressure differential, and flow rate. This ensures that the curve is more realistic and improves the accuracy of remaining fuel life determination. Based on the fuel-filter flow resistance curve and initial engine settings, the remaining fuel life and the maximum remaining fuel life can be accurately calculated. This information is then displayed and warned via the instrument panel based on specific conditions, prompting users to promptly maintain or replace the filter, thereby preventing filter issues from impacting engine performance and extending engine life. The electronic control unit monitors the engine, acquiring data from the rail pressure sensor to determine operating status and duration. Furthermore, the system determines injection volume based on rail pressure and power-up time, and calculates fuel flow based on fuel return volume. This comprehensive and accurate data acquisition ensures the effective implementation of the entire maintenance method. The entire maintenance method has clear logic and each step is closely connected. Information is displayed intuitively through the instrument, allowing users to understand the filter condition in a timely manner. The operation is simple and easy to understand, which improves the efficiency and convenience of maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0015] Figure 1 This is a flow chart of a maintenance method for an engine fuel filter according to an embodiment of the present application;

[0016] Figure 2 This is a structural schematic diagram of an engine fuel filter maintenance system according to an embodiment of the present application;

[0017] Figure 3 This is a schematic diagram of a maintenance device for an engine fuel filter in an embodiment of the present application. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of this application more clear, the technical solutions of this application will be clearly and completely described below in conjunction with the specific embodiments of this application and the corresponding drawings. Obviously, the embodiments described are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0019] The following describes in detail the technical solutions provided by various embodiments of the present application in conjunction with the accompanying drawings.

[0020] like Figure 1 As shown, in order to solve the above problems, an embodiment of the present application provides a maintenance method for an engine fuel filter, which is applied in an engine fuel filter maintenance system, wherein the system includes an engine, such as Figure 2 As shown, the fuel filter is arranged in the engine, and the fuel filter includes a fuel tank 1, a pressure sensor group 2, a fuel coarse filter 3, a fuel delivery pump 4, a fuel fine filter 5, a fuel injection pump 6, a common rail pipe 7, a fuel injector 8, a pressure limiting valve 9, an electronic control unit 10, an instrument 11, and a rail pressure sensor 12.

[0021] Methods include:

[0022] S101. Determine a coarse fuel filter and a fine fuel filter of a fuel filter, determine a first pressure difference corresponding to the coarse fuel filter and a second pressure difference corresponding to the fine fuel filter, and determine a filter pressure difference based on the first pressure difference and the second pressure difference.

[0023] The fuel transfer pump is responsible for drawing fuel from the fuel tank, pressurizing it, and then delivering the pressurized fuel to the injection pump.

[0024] The fuel injection pump is connected to the common rail pipe, on which a rail pressure sensor is installed. The sensor can collect rail pressure information in real time and transmit it to the electronic control unit.

[0025] Following the common rail pipe is the fuel injector. The opening time of the fuel injector is precisely controlled by the electronic control unit to achieve precise control of the engine fuel injection amount.

[0026] In one embodiment, to filter impurities from the fuel and prevent wear on precision components like the fuel pump and injector, the system incorporates a fuel filter along the fuel delivery path. A fine fuel filter is preferably installed between the fuel delivery pump and the injection pump, as it offers higher filtration accuracy and can filter out smaller particles. A coarse fuel filter can optionally be installed between the fuel tank and the fuel delivery pump to filter out larger particles, thereby extending the life of the fine filter.

[0027] In one embodiment, a first pressure sensor group is located in front of and behind the primary fuel filter, and a first pressure differential across the primary fuel filter is determined based on the first pressure sensor group. A second pressure sensor group is located in front of and behind the secondary fuel filter, and a second pressure differential across the secondary fuel filter is determined based on the second pressure sensor group. Pressure sensors are installed in front of and behind the primary and secondary fuel filters, respectively. These sensors can obtain pressure values ​​across the filter, and the differential pressure Pd across the filter is calculated from the difference. Filters in different locations can use the same layout to obtain the differential pressure Pd, facilitating unified monitoring and analysis.

[0028] S102: Determine the fuel injection amount of the engine, and determine the fuel flow rate of the engine according to the fuel injection amount.

[0029] The pressure-limiting valve is connected in parallel with the fuel transfer pump. This design ensures that the fuel pressure after the fuel transfer pump is maintained stable. When the fuel pump delivers more fuel than required, the excess fuel is returned to the fuel transfer pump through the pressure-limiting valve, ensuring that the fuel flow rate Q in the low-pressure fuel line meets the specified relationship: Q = Qi + Qpr + Qir. Here, Q is the fuel flow rate, Qi is the injector fuel volume, Qpr is the injection pump return volume, and Qir is the injector return volume.

[0030] S103: Fitting the usage time of the fuel filter, the filter pressure difference, and the fuel flow rate to obtain a fuel-filter flow resistance curve, determining a remaining service life based on the fuel-filter flow resistance curve, and performing early warning and maintenance on the fuel filter based on the remaining service life.

[0031] The engine is equipped with an electronic control unit (ECU), which boasts powerful data processing capabilities. It acquires, stores, and calculates data transmitted by the pressure sensor, identifying the engine's operating status. For example, it determines whether the engine is running based on the engine speed and only records the operating hours when it is running, while also recording the engine's fuel filter usage time (t). The engine is also equipped with a meter. The ECU transmits calculation results and alarm information to the meter, which intuitively displays engine status values, maintenance reminders, and alarm messages, allowing users to keep abreast of the engine's operating status.

[0032] In one embodiment, engine power is proportional to the engine's fuel injection volume. When the engine reaches maximum fuel injection volume, it also means it has reached maximum power. The electronic control unit uses a table of rail pressure, power-on duration, and fuel injection volume relationships corresponding to the injector's characteristics, based on the rail pressure and injector power-on duration. This table is entered into the ECU during engine calibration. During engine operation, the ECU can obtain the fuel injection volume by looking up the table and calculating the engine's fuel injection volume. Since the engine's fuel injection volume is proportional to the return oil volume from the injection pump and injectors, the fuel injection volume can be used to further calculate the engine's low-pressure fuel line fuel flow rate, Q.

[0033] In one embodiment, the fuel filter pressure difference Pd is proportional to the square of the fuel flow rate Q 2 By collecting differential pressure data at different engine power levels, we can fit the fuel filter flow resistance curve f(t) for the fuel filter's operating time t. Based on this curve, we can calculate the fuel filter differential pressure Pd at any engine power level.

[0034] The engine obtains a fuel filter flow resistance curve f(0) when the fuel filter is in use for a period of time t=0. Every time the fuel filter runs for a preset period of time Δt, a plurality of new first fuel filter flow resistance curves are obtained, which are sequentially recorded as f(1), f(2), f(3), ...

[0035] Test records show that at the same flow rate Q, the differential pressure Pd of a uniformly clogged fuel filter is exponentially related to the filter life t, represented by the second fuel-filter flow resistance curve g(Q). By analyzing the fuel-filter flow resistance curves f(t) at different filter life t times, a series of fuel-filter resistance values ​​Pd at different flow rates Q can be obtained, and multiple fuel-filter flow resistance curves g(Q) can be fitted.

[0036] In one embodiment, substituting the maximum allowable fuel filter differential pressure Pdm into g(Q) yields the estimated fuel filter life tm at the engine's current power P, i.e., flow rate Q. The difference tr = tm - t, the estimated remaining fuel filter life at the engine's current flow rate Q.

[0037] In one embodiment, when the engine reaches a maximum power Pm, that is, the fuel flow rate Q reaches a maximum value Qm, the above method can be used to obtain the maximum remaining usable time tr_m of the fuel filter at the maximum power of the engine.

[0038] When tr_m and tr are both greater than 0, the system reminds the user through the instrument display of the remaining usable time of the fuel filter at the maximum power and current power of the engine respectively; when tr_m<0 and tr>0, the system reminds the user through the instrument display of the remaining usable time of the fuel filter at the current power of the engine, and warns that the fuel filter no longer supports the engine working at maximum power, and recommends that the user replace the fuel filter in time according to actual conditions; when tr_m and tr are both less than 0, the system issues an alarm to the user through the instrument display, requiring immediate replacement of the fuel filter.

[0039] In one embodiment, the instrument panel includes a fuel filter life reset function. This function resets the fuel filter usage time t accumulated by the electronic control unit after the user replaces the fuel filter, allowing the system to accurately monitor and calculate the fuel filter's service life again.

[0040] In one embodiment, assuming that t is 0 and 100 h respectively, the fuel filter pressure difference Pd corresponding to different fuel flow rates Q collected by the electronic control unit is shown in Table 1 below.

[0041] Table 1 Different fuel flow rates Q corresponding to fuel filter pressure difference Pd

[0042]

[0043]

[0044] The fitting formula can be obtained:

[0045] f(0)=1.19e-4·Q2+1.12e-2·Q+1.14

[0046] f(1)=2.00e-4·Q2+3.00e-2·Q+1

[0047] Assuming the current flow rate Q is 150 kg / h and the maximum flow rate is 180 kg / h, the fuel filter pressure difference Pd corresponding to different fuel filter usage time t can be obtained through the above fitting formula as shown in Table 2 below.

[0048] Table 2 Fuel filter pressure difference Pd corresponding to different fuel filter usage time t

[0049]

[0050] The fitting formula can be obtained:

[0051] g(150)=5.4975e0.006t

[0052] g(180)=7.0116e0.0061t

[0053] Let Pdm = 80 kPa, and substitute g(150) and g(180) respectively to obtain the maximum service life tm of the fuel filter as 446 h and 399 h respectively. It can be obtained that after the engine fuel filter is used for 100 h, at the current engine power, that is, the current flow rate Q = 150 kg / h, the estimated remaining usable time of the fuel filter tr = 346 h. At the maximum engine power (that is, the maximum flow rate Q = 180 kg / h), the estimated remaining usable time of the fuel filter tr_m = 299 h.

[0054] like Figure 3 As shown, the embodiment of the present application further provides a maintenance device for an engine fuel filter, comprising:

[0055] at least one processor; and,

[0056] a memory communicatively connected to at least one processor; wherein,

[0057] The memory stores instructions that can be executed by at least one processor. The instructions are executed by the at least one processor to enable a maintenance device for an engine fuel filter to perform the method described in any one of the above embodiments.

[0058] An embodiment of the present application further provides a non-volatile computer storage medium storing computer executable instructions, wherein the computer executable instructions are configured to perform the method described in any one of the above embodiments.

[0059] In the 1990s, technological improvements could be clearly distinguished as either hardware improvements (for example, improvements to circuit structures like diodes, transistors, and switches) or software improvements (improvements to process flows). However, with the advancement of technology, many process flow improvements today can now be considered direct improvements to hardware circuit structures. Designers almost always create the corresponding hardware circuit structure by programming the improved process flow into the hardware circuit. Therefore, it cannot be said that a process flow improvement cannot be implemented using hardware modules. For example, a programmable logic device (PLD), such as a field programmable gate array (FPGA), is an integrated circuit whose logical function is determined by user programming. Designers can "integrate" a digital system on a PLD by programming it themselves, without having to hire a chip manufacturer to design and manufacture a dedicated integrated circuit chip. Moreover, nowadays, instead of manually making integrated circuit chips, this type of programming is mostly implemented using "logic compiler" software, which is similar to the software compiler used when developing and writing programs. The original code before compilation must also be written in a specific programming language, which is called hardware description language (HDL). There is not only one HDL, but many types, such as ABEL (Advanced Boolean Expression Language), AHDL (Altera Hardware Description Language), Confluence, CUPL (Cornell University Programming Language), HDCal, JHDL (Java Hardware Description Language), Lava, Lola, MyHDL, PALASM, RHDL (Ruby Hardware Description Language), etc. The most commonly used ones are VHDL (Very-High-Speed ​​Integrated Circuit Hardware Description Language) and Verilog. Those skilled in the art should also be aware that it is easy to obtain a hardware circuit that implements the logical method flow by simply performing some logic programming on the method flow using the aforementioned hardware description languages ​​and programming it into an integrated circuit.

[0060] The controller can be implemented in any suitable manner. For example, the controller can take the form of a microprocessor or processor and a computer-readable medium storing computer-readable program code (such as software or firmware) executable by the (micro)processor, logic gates, switches, application-specific integrated circuits (ASICs), programmable logic controllers, and embedded microcontrollers. Examples of controllers include, but are not limited to, the following microcontrollers: ARC625D, Atmel AT91SAM, Microchip PIC18F26K20, and Silicone Labs C8051F320. The memory controller can also be implemented as part of the control logic of the memory. Those skilled in the art will also know that in addition to implementing the controller in a purely computer-readable program code manner, it is entirely possible to implement the same function in the form of logic gates, switches, application-specific integrated circuits, programmable logic controllers, and embedded microcontrollers by logically programming the method steps. Therefore, such a controller can be considered a hardware component, and the devices included therein for implementing various functions can also be considered as structures within the hardware component. Or even, the devices for implementing various functions can be considered as both software modules that implement the method and structures within the hardware component.

[0061] The systems, devices, modules, or units described in the above embodiments may be implemented by computer chips or entities, or by products having certain functions. A typical implementation device is a computer. Specifically, the computer may be, for example, a personal computer, a laptop computer, a cellular phone, a camera phone, a smartphone, a personal digital assistant, a media player, a navigation device, an email device, a game console, a tablet computer, a wearable device, or a combination of any of these devices.

[0062] For the convenience of description, the above devices are described as being divided into various units according to their functions. Of course, when implementing this specification, the functions of each unit can be implemented in the same or multiple software and / or hardware.

[0063] The various embodiments in this application are described in a progressive manner. Similar portions between the various embodiments can be referred to in conjunction with each other. Each embodiment focuses on the differences between the other embodiments. In particular, the device and medium embodiments are generally similar to the method embodiments, so their descriptions are relatively simple. For relevant portions, refer to the descriptions of the method embodiments.

[0064] The devices and media provided in the embodiments of the present application correspond one-to-one to the methods. Therefore, the devices and media also have similar beneficial technical effects to their corresponding methods. Since the beneficial technical effects of the methods have been described in detail above, the beneficial technical effects of the devices and media will not be repeated here.

[0065] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0066] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0067] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0068] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0069] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0070] Memory may include non-permanent storage in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. Memory is an example of a computer-readable medium.

[0071] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0072] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0073] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A maintenance method for an engine fuel filter, characterized in that: include: determining a coarse fuel filter and a fine fuel filter of a fuel filter, determining a first pressure difference corresponding to the coarse fuel filter and a second pressure difference corresponding to the fine fuel filter, and determining a filter pressure difference based on the first pressure difference and the second pressure difference; determining a fuel injection amount of an engine, and determining a fuel flow rate of the engine based on the fuel injection amount; The service life of the fuel filter, the filter pressure difference, and the fuel flow rate are fitted to obtain a fuel-filter flow resistance curve, and a remaining service life is determined based on the fuel-filter flow resistance curve, so that an early warning and maintenance of the fuel filter are performed based on the remaining service life.

2. The method according to claim 1, characterized in that Fitting the fuel filter usage time, the filter pressure difference, and the fuel flow rate to obtain a fuel-filter flow resistance curve specifically includes: determining a plurality of preset usage periods, and fitting the filter pressure difference and the fuel flow rate corresponding to the plurality of usage periods to obtain a plurality of first fuel-filter flow resistance curves corresponding to the plurality of usage periods; determining a plurality of preset flow values, and fitting the filter pressure difference and the usage time corresponding to the plurality of flow values ​​to obtain a plurality of second fuel-filter flow resistance curves corresponding to the plurality of flow values; The plurality of first fuel-filter flow resistance curves and the plurality of second fuel-filter flow resistance curves are fitted to obtain the fuel-filter flow resistance curve.

3. The method according to claim 1, characterized in that Determining the remaining time according to the fuel-filtration flow resistance curve specifically includes: determining initial settings of the engine, the initial settings including a maximum filter differential pressure, and determining a current fuel flow rate of the engine, substituting the maximum filter differential pressure and the fuel flow rate into the fuel-filter flow resistance curve to obtain an allowable time corresponding to the current fuel flow rate; The operating time of the engine is determined, and the remaining time is determined according to the operating time and the allowed time.

4. The method according to claim 3, characterized in that Providing early warning and maintenance on the fuel filter according to the remaining time, specifically including: determining a maximum fuel flow rate of the engine, determining a limit remaining time of the engine based on the maximum fuel flow rate and the maximum filter pressure difference, and comprehensively comparing the remaining time with the limit remaining time; If the limit remaining time is greater than zero and the remaining time is greater than zero, the limit remaining time and the remaining time are displayed through a preset meter; If the limit remaining time is less than zero and the remaining time is greater than zero, the remaining time is displayed on the instrument and a first warning message is issued, the first warning message being that the fuel filter does not support the engine operating at maximum power and a timely replacement of the fuel filter is recommended; If the limit remaining time is less than zero and the remaining time is less than zero, a second warning message is issued through the instrument, and the second warning message is to replace the fuel filter immediately.

5. The method according to claim 3, characterized in that The method further comprises: The engine is monitored by a pre-set electronic control unit to obtain sensor data of the engine, the operating state of the engine is determined according to the sensor data, and the operating time of the engine is determined according to the operating state.

6. The method according to claim 5, characterized in that The engine is monitored by a pre-set electronic control unit, specifically including: A pre-set common rail pipe is determined, and a rail pressure sensor is determined that is provided on the common rail pipe. Sensor data is acquired through the rail pressure sensor, and the sensor data is sent to the electronic control unit.

7. The method according to claim 1, characterized in that Determining the fuel flow rate of the engine according to the fuel injection amount specifically includes: Determining the fuel injector and fuel injection pump of the fuel filter, determining the rail pressure and power-on duration of the fuel injector through a pre-set electronic control unit, and determining the fuel injection amount of the fuel injector according to the rail pressure and the power-on duration; The fuel return amount of the fuel injector and the fuel return amount of the fuel injection pump are determined, and the fuel flow rate is obtained by performing calculation based on the fuel injection amount of the fuel injector, the fuel return amount of the fuel injector and the fuel return amount of the fuel injection pump.

8. The method according to claim 1, characterized in that Determining a first pressure difference corresponding to the coarse fuel filter and a second pressure difference corresponding to the fine fuel filter specifically includes: determining a first pressure sensor group at both ends of the fuel filter, and determining a first pressure difference between the two ends of the fuel filter according to the first pressure sensor group; A second pressure sensor group at the front and rear ends of the fuel fine filter is determined, and a second pressure difference at the front and rear ends of the fuel fine filter is determined based on the second pressure sensor group.

9. A maintenance device for an engine fuel filter, characterized in that: include: at least one processor; as well as, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor to enable the maintenance device of the engine fuel filter to perform: the method according to any one of claims 1 to 8.

10. A non-volatile computer storage medium storing computer executable instructions, characterized in that: The computer executable instructions are configured to: perform the method according to any one of claims 1 to 8.

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