Memory, diesel cetane number determination method, apparatus and device

Abstract

The application discloses a memory, a diesel cetane number determination method, equipment and device, wherein the method comprises the following steps: obtaining the corresponding relationship between the angle adjustment value of the injection advance angle and the time variation of the pulse interval of the electronic fuel injection timing control device in advance; obtaining the initial value of the injection advance angle of the diesel sample or diesel standard sample, and calculating the angle difference value between the initial value of the injection advance angle and the target value of the injection advance angle; taking the angle difference value as a parameter, obtaining the time adjustment difference value of the pulse interval of the electronic fuel injection timing control device through the corresponding relationship; and adjusting the pulse interval of the electronic fuel injection timing control device according to the time adjustment difference value; the application can automatically complete the rotation of the control knob by a corresponding angle, and the injection advance angle does not need to be manually rotated multiple times to be adjusted to the target value, so that the difficulty of manual operation is reduced, and the efficiency and precision of the cetane number determination are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of industrial control, and in particular to a memory, a method, equipment and apparatus for determining the cetane number of diesel fuel. Background Technology

[0002] Cetane number is an important indicator for measuring the ignition performance of diesel fuel in compression ignition engines. A higher cetane number indicates better ignition performance, shorter ignition delay, more uniform combustion, and smoother engine startup. A low cetane number indicates difficulty in combustion and ignition, a longer ignition delay, and a rougher engine operation. However, an excessively high cetane number can also produce a small amount of black smoke due to incomplete combustion in some areas.

[0003] The cetane number of diesel fuel is determined under specified operating conditions in a standard test diesel engine (GB / T 386-2010).

[0004] In the process of determining the cetane number of diesel fuel, it is necessary to adjust the ignition lag period and injection advance angle of the diesel fuel sample to be tested and the reference sample respectively.

[0005] The inventors discovered through research that, because the adjustment of the injection advance angle is extremely precise, the existing technology of adjusting the injection advance angle by manually rotating the knob often requires repeated rotation to adjust the injection advance angle properly, and overshoot can easily occur if not careful. Therefore, the operation is too difficult and the work efficiency is low.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to reduce the difficulty of manual operation and improve the efficiency and accuracy of cetane number determination.

[0008] This invention provides a method for determining the cetane number of diesel fuel, comprising the following steps: S11. A first correspondence is obtained between the angle adjustment value of the injection advance angle and the time change of the pulse interval of the electronic fuel injection timing control device, and a second correspondence is obtained between the rotation angle value of the control knob and the time change. S12. Obtain the initial value of the injection advance angle of the diesel sample or diesel standard sample, and calculate the angle difference between the initial value of the injection advance angle and the target value of the injection advance angle. S13. Using the angle difference as a parameter, obtain the time change of the pulse interval of the electronic fuel injection timing control device through the first correspondence relationship; S14. Using the time change as a parameter, obtain the rotation angle value through the second correspondence relationship; S15. Adjust the rotation angle of the control knob according to the rotation angle value through a preset adjustment mechanism.

[0009] In this invention, the target value of the injection advance angle is 13 degrees.

[0010] In this invention, the method for generating the first correspondence includes: Multiple initial angle values ​​are preset, and the angle difference between each preset initial angle value and the target value of the injection advance angle is obtained respectively; When each preset initial angle value is adjusted to the target value of the injection advance angle, the change in the pulse interval of the corresponding electronic fuel injection timing control device is obtained; Based on the angle difference between each preset initial angle value and the target value of the injection advance angle, and the corresponding pulse interval change, a calculation model is established for calculating the pulse interval change of the electronic fuel injection timing control device.

[0011] In this invention, the step of establishing a calculation model for calculating the pulse interval variation of an electronic fuel injection timing control device includes: A calculation model is established using deep learning, with each preset initial angle value and / or the angle difference between each preset initial angle value and the target value of the injection advance angle as the independent variable, and the pulse interval change of the electronic fuel injection timing control device as the dependent variable.

[0012] In another aspect of the present invention, a diesel cetane number measuring device is also provided, comprising: The relationship setting unit is used to pre-observe the correspondence between the angle adjustment value of the injection advance angle and the time change of the pulse interval of the electronic fuel injection timing control device; The initial value acquisition unit is used to acquire the initial value of the injection advance angle of the diesel sample or diesel standard sample, and to calculate the angle difference between the initial value of the injection advance angle and the target value of the injection advance angle. The difference generation unit is used to obtain the time adjustment difference of the pulse interval of the electronic fuel injection timing control device by using the angle difference as a parameter and through the correspondence. A pulse adjustment unit is used to adjust the pulse interval of the electronic fuel injection timing control device according to the time adjustment difference.

[0013] In this invention, the target value of the injection advance angle is 13 degrees.

[0014] In this invention, the method for generating the first correspondence includes: Multiple initial angle values ​​are preset, and the angle difference between each preset initial angle value and the target value of the injection advance angle is obtained respectively; When each preset initial angle value is adjusted to the target value of the injection advance angle, the change in the pulse interval of the corresponding electronic fuel injection timing control device is obtained; Based on the angle difference between each preset initial angle value and the target value of the injection advance angle, and the corresponding pulse interval change, a calculation model is established for calculating the pulse interval change of the electronic fuel injection timing control device.

[0015] In this invention, the computational model includes: A calculation model is established using deep learning, with each preset initial angle value and / or the angle difference between each preset initial angle value and the target value of the injection advance angle as the independent variable, and the pulse interval change of the electronic fuel injection timing control device as the dependent variable.

[0016] In another aspect of the present invention, a memory is also provided, including a software program adapted for a processor to execute the steps of the above-described diesel cetane number determination method.

[0017] Another aspect of this invention provides a diesel cetane number measuring device, which includes a computer program stored in a memory. The computer program includes program instructions, which, when executed by a computer, cause the computer to perform the methods described in the above aspects and achieve the same technical effects.

[0018] Compared with the prior art, the present invention has the following beneficial effects: In this invention, to reduce the difficulty of manual operation and improve the efficiency and accuracy of cetane number determination, a first correspondence is preset between the injection advance angle adjustment value and the time change of the pulse interval of the electronic fuel injection timing control device, and a second correspondence is preset between the rotation angle value of the control knob and the time change. In this way, during the determination of diesel samples with unknown cetane numbers, the angle difference between the initial value and the target value of the injection advance angle can be calculated based on the initial value of the injection advance angle of the diesel sample or diesel standard sample. Then, the rotation angle of the control knob can be calculated through the first and second correspondences. The control knob can then be rotated by the corresponding angle through an automatic adjustment mechanism.

[0019] As can be seen from the above, the present invention can automatically rotate the control knob to the corresponding angle, eliminating the need for manual operation to repeatedly rotate the control knob based on experience to adjust the injection advance angle to the target value. Therefore, it reduces the difficulty of manual operation and effectively improves the efficiency and accuracy of cetane number determination.

[0020] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, and to make the above and other objects, technical features and advantages of the present invention easier to understand, one or more preferred embodiments are listed below and described in detail with reference to the accompanying drawings. Attached Figure Description

[0021] Figure 1 This is a flowchart illustrating the steps of the diesel cetane number determination method described in this invention; Figure 2 This is a schematic diagram of the diesel cetane number measuring device described in this invention; Figure 3 This is a schematic diagram of the diesel cetane number determination system described in this invention. Detailed Implementation

[0022] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0023] Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprises" shall be understood to include the stated elements or components without excluding other elements or other components.

[0024] In this document, for ease of description, spatial relative terms such as “below,” “under,” “down,” “above,” “above,” “up,” etc., are used to describe the relationship of one element or feature to another element or feature in the accompanying drawings. It should be understood that spatial relative terms are intended to encompass different orientations of an object in use or operation, in addition to those depicted in the figures. For example, if an object in the figure is flipped, an element described as “below” or “under” another element or feature would be oriented “above” that element or feature. Thus, the exemplary term “below” can encompass both the downward and upward orientations. An object may also have other orientations (rotated 90 degrees or other orientations), and the spatial relative terms used herein should be interpreted accordingly.

[0025] In this document, the terms "first," "second," etc., are used to distinguish two different elements or parts, and are not used to define specific positions or relative relationships. In other words, in some embodiments, the terms "first," "second," etc., can also be used interchangeably.

[0026] To reduce the difficulty of manual operation and improve the efficiency and accuracy of cetane number determination, refer to Figure 1 This invention provides a method for determining the cetane number of diesel fuel, comprising the following steps: S11. A first correspondence is obtained between the angle adjustment value of the injection advance angle and the time change of the pulse interval of the electronic fuel injection timing control device, and a second correspondence is obtained between the rotation angle value of the control knob and the time change. In traditional cetane number determination methods, when measuring diesel samples or standards, the pulse time interval of the electronic fuel injection timing control device is adjusted by rotating the control knob of the cetane number tester, thereby adjusting the injection advance angle. In this embodiment of the invention, after establishing the correspondence between the rotation angle value of the control knob and the change in the pulse time interval (i.e., the second correspondence), the required rotation angle of the control knob can be calculated based on the change in the pulse time interval. In practical applications, the second correspondence can be obtained through a limited number of experiments.

[0027] Next, in this embodiment of the invention, it is also necessary to obtain the correspondence between the injection advance angle adjustment value and the change in the pulse interval of the electronic fuel injection timing control device (i.e., the first correspondence). Specifically, during the determination of the cetane number of a diesel sample, it is necessary to adjust the injection advance angle of the diesel sample or diesel standard sample to a preset target value (generally 13 degrees). In this process, since the initial value of the injection advance angle of the cetane number tester is not determined each time, the angle adjustment value from the initial value to the target value is also uncertain. Different injection advance angle adjustments require corresponding changes in the pulse interval of the electronic fuel injection timing control device. Therefore, by establishing a first correspondence, the change in the corresponding pulse interval can be calculated based on the required angle adjustment value.

[0028] In practical applications, the inventors discovered that expressing the correspondence between the angle adjustment value and the change in pulse interval through a proportional relationship can lead to certain deviations. Therefore, in this embodiment of the invention, a more accurate representation of the correspondence between the angle adjustment value and the change in pulse interval can be obtained by establishing a calculation model. Specifically, this can be achieved by: S101. Preset multiple initial angle values, and obtain the angle difference between each preset initial angle value and the target value of the injection advance angle; In this step, different initial angle values ​​are sampled to collect multiple test samples with different preset initial angle values; in this way, multiple angle differences can be obtained as adjustment values ​​for each angle. S102. When each preset initial angle value is adjusted to the target value of the injection advance angle, the change in the pulse interval of the corresponding electronic fuel injection timing control device is obtained. S103. Based on the angle difference between each preset initial angle value and the target value of the injection advance angle, and the corresponding pulse interval change, establish a calculation model for calculating the pulse interval change of the electronic fuel injection timing control device.

[0029] In order to obtain the training data required to build the computational model, it is necessary to obtain the change in pulse interval of the electronic fuel injection timing control device when each preset initial angle value is adjusted to the target value of the injection advance angle. In other words, it is necessary to record the change in pulse interval corresponding to multiple test samples with different preset initial angle values. In practical applications, a calculation model can be established using deep learning, with each preset initial angle value and / or the angle difference between each preset initial angle value and the target value of the injection advance angle as the independent variable, and the pulse interval change of the electronic fuel injection timing control device as the dependent variable.

[0030] The above calculation model can be applied to calculate the pulse interval change of the electronic fuel injection timing control device under various initial angle values.

[0031] S12. Obtain the initial value of the injection advance angle of the diesel sample or diesel standard sample, and calculate the angle difference between the initial value of the injection advance angle and the target value of the injection advance angle. After the preset steps S11 and S12, when determining the cetane number of a diesel sample with an unknown cetane number, it is first necessary to adjust the injection advance angle of the diesel sample and two diesel standard samples respectively (i.e., adjust the injection advance angle to the preset target value) and obtain the handwheel reading of the cetane number analyzer or the gas meter reading to calculate the cetane number of the diesel sample.

[0032] In this embodiment of the invention, the initial value of the current injection advance angle of the diesel sample or diesel standard sample is first obtained, and the angle difference between the initial value of the injection advance angle and the target value of the injection advance angle is calculated. For example, if the target value of the injection advance angle is 13 degrees, the angle difference is 20 degrees when the initial value of the injection advance angle is 33 degrees. S13. Using the angle difference as a parameter, obtain the time change of the pulse interval of the electronic fuel injection timing control device through the first correspondence relationship; After obtaining the angle difference (equivalent to the angle adjustment value of the injection advance angle) from the initial value of the current injection advance angle to the target value of the final injection advance angle, the time change of the pulse interval of the electronic fuel injection timing control device can be calculated through the first correspondence.

[0033] S14. Using the time change as a parameter, obtain the rotation angle value through the second correspondence relationship; After calculating the time variation of the pulse interval of the required electronic fuel injection timing control device, the rotation angle of the control knob can be calculated using the time variation as a parameter through the second correspondence.

[0034] In practical applications, the rotation angle of the control knob can be obtained through the calculation model in the embodiments of the present invention.

[0035] S15. Adjust the rotation angle of the control knob according to the rotation angle value through a preset adjustment mechanism.

[0036] To improve the efficiency and accuracy of diesel cetane number determination by automatically adjusting the control knob, this embodiment of the invention also includes a preset adjustment mechanism to rotate the control knob according to a rotation angle value. In practical applications, the adjustment mechanism can generate corresponding control commands based on the rotation angle value, and a stepper motor can be used to drive the control knob to rotate at a set angle.

[0037] In summary, in this embodiment of the invention, to reduce the difficulty of manual operation and improve the efficiency and accuracy of cetane number determination, a first correspondence is preset between the injection advance angle adjustment value and the time change of the pulse interval of the electronic fuel injection timing control device, and a second correspondence is preset between the rotation angle value of the control knob and the time change. Thus, during the determination of diesel samples with unknown cetane numbers, the angle difference between the initial value and the target value of the injection advance angle can be calculated based on the initial value of the injection advance angle of the diesel sample or diesel standard. The rotation angle of the control knob can then be calculated using the first and second correspondences. An automatic adjustment mechanism then rotates the control knob to the corresponding angle.

[0038] As can be seen from the above, through the embodiments of the present invention, the control knob can be automatically rotated to the corresponding angle, eliminating the need for manual operation to repeatedly rotate the control knob based on experience to adjust the injection advance angle to the target value. Therefore, the difficulty of manual operation is reduced, and the efficiency and accuracy of cetane number determination are effectively improved.

[0039] In another aspect of the embodiments of the present invention, such as Figure 2 As shown, a diesel cetane number measuring device is also provided, comprising: The relationship setting unit 01 is used to pre-obtain a first correspondence between the angle adjustment value of the injection advance angle and the time change of the pulse interval of the electronic fuel injection timing control device, and a second correspondence between the rotation angle value of the control knob and the time change. The initial value acquisition unit 02 is used to acquire the initial value of the injection advance angle of the diesel sample or diesel standard sample, and to calculate the angle difference between the initial value of the injection advance angle and the target value of the injection advance angle. The adjustment value acquisition unit 03 is used to obtain the time change of the pulse interval of the electronic fuel injection timing control device through the first correspondence relationship, using the angle difference as a parameter. Angle value acquisition unit 04 is used to acquire the rotation angle value through the second correspondence relationship using the time change as a parameter. Automatic adjustment unit 05 is used to adjust the rotation angle of the control knob according to the rotation angle value through a preset adjustment mechanism.

[0040] Because the working principle and beneficial effects of the diesel cetane number measuring device in the embodiments of the present invention have already been demonstrated... Figure 1 The corresponding method for determining the cetane number of diesel fuel is also described and explained, so they can be used for reference. Therefore, it will not be elaborated further here.

[0041] In this embodiment of the invention, a memory is also provided, wherein the memory includes a software program adapted for execution by a processor. Figure 1 Each step in the corresponding diesel cetane number determination method.

[0042] The embodiments of the present invention can be implemented by means of software programs, that is, by writing programs to implement... Figure 1 The software program (and instruction set) for each step in the corresponding diesel cetane number determination method is stored in a storage device located in a computer device, so that the processor of the computer device can call the software program to achieve the purpose of the embodiments of the present invention.

[0043] In another aspect of the present invention, a diesel cetane number measuring device is also provided. The memory included in the diesel cetane number measuring device includes a corresponding computer program product. When the program instructions included in the computer program product are executed by a computer, the computer can perform the diesel cetane number measuring method described in the above aspects and achieve the same technical effect.

[0044] Figure 3 This is a schematic diagram of the hardware structure of a diesel cetane number measuring device as an electronic device according to an embodiment of the present invention, as shown below. Figure 3 As shown, the device includes one or more processors 610, a bus 630, and a memory 620. Taking a processor 610 as an example, the device may also include an input device 640 and an output device 650.

[0045] The processor 610, memory 620, input device 640, and output device 650 can be connected via a bus or other means. Figure 3 Taking the example of a connection between China and Israel via a bus.

[0046] The memory 620, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules. The processor 610 executes various functional applications and data processing of the electronic device by running the non-transitory software programs, instructions, and modules stored in the memory 620, thereby implementing the processing method of the above-described method embodiments.

[0047] The memory 620 may include a program storage area and a data storage area, wherein the program storage area may store the operating system and applications required for at least one function; the data storage area may store data, etc. Furthermore, the memory 620 may include high-speed random access memory, and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 620 may optionally include memory remotely located relative to the processor 610, and these remote memories may be connected to the processing device via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0048] Input device 640 can receive input digital or character information and generate signal input. Output device 650 may include display devices such as a display screen.

[0049] The one or more modules are stored in the memory 620, and when executed by the one or more processors 610, they perform the following: S11. A first correspondence is obtained between the angle adjustment value of the injection advance angle and the time change of the pulse interval of the electronic fuel injection timing control device, and a second correspondence is obtained between the rotation angle value of the control knob and the time change. S12. Obtain the initial value of the injection advance angle of the diesel sample or diesel standard sample, and calculate the angle difference between the initial value of the injection advance angle and the target value of the injection advance angle. S13. Using the angle difference as a parameter, obtain the time change of the pulse interval of the electronic fuel injection timing control device through the first correspondence relationship; S14. Using the time change as a parameter, obtain the rotation angle value through the second correspondence relationship; S15. Adjust the rotation angle of the control knob according to the rotation angle value through a preset adjustment mechanism.

[0050] Preferably, the method for generating the first correspondence includes: Multiple initial angle values ​​are preset, and the angle difference between each preset initial angle value and the target value of the injection advance angle is obtained respectively; When each preset initial angle value is adjusted to the target value of the injection advance angle, the change in the pulse interval of the corresponding electronic fuel injection timing control device is obtained; Based on the angle difference between each preset initial angle value and the target value of the injection advance angle, and the corresponding pulse interval change, a calculation model is established for calculating the pulse interval change of the electronic fuel injection timing control device.

[0051] Preferably, the step of establishing a calculation model for calculating the pulse interval variation of the electronic fuel injection timing control device includes: Using the angle difference between each preset initial angle value and / or the target value of the injection advance angle as the independent variable, and the pulse interval change of the electronic fuel injection timing control device as the dependent variable, a calculation model is established through deep learning. The above-described product can execute the method provided in the embodiments of the present invention, and has the corresponding functional modules and beneficial effects for executing the method. Technical details not described in detail in this embodiment can be found in the method provided in the embodiments of the present invention.

[0052] In the embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units through some interfaces, and may be electrical, mechanical, or other forms.

[0053] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0054] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0055] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage device and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage device includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), ReRAM, MRAM, PCM, NAND Flash, NOR Flash, memristor, magnetic disks, or optical disks.

[0056] The above-described embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present invention. In the embodiments provided by this invention, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units through some interfaces, and may be electrical, mechanical, or other forms.

[0057] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0058] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0059] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage device and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage device includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), ReRAM, MRAM, PCM, NAND Flash, NOR Flash, memristor, magnetic disks, or optical disks.

[0060] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for determining the cetane number of diesel fuel, characterized in that, Including the following steps: S11. A first correspondence is obtained between the angle adjustment value of the injection advance angle and the time change of the pulse interval of the electronic fuel injection timing control device, and a second correspondence is obtained between the rotation angle value of the control knob and the time change; the second correspondence is used to calculate the required rotation angle of the control knob based on the change of the pulse time interval; the rotation of the control knob is used to adjust the injection advance angle. S12. Obtain the initial value of the injection advance angle of the diesel sample or diesel standard sample, and calculate the angle difference between the initial value of the injection advance angle and the target value of the injection advance angle. S13. Using the angle difference as a parameter, obtain the time change of the pulse interval of the electronic fuel injection timing control device through the first correspondence relationship; S14. Using the time change as a parameter, obtain the rotation angle value through the second correspondence relationship; S15. Adjusting the rotation angle of the control knob according to the rotation angle value through a preset adjustment mechanism includes: the adjustment mechanism generating a corresponding control command according to the rotation angle value, and driving the control knob to rotate through a stepper motor.

2. The method for determining the cetane number of diesel fuel according to claim 1, characterized in that, The target value for the injection advance angle is 13 degrees.

3. The method for determining the cetane number of diesel fuel according to claim 1, characterized in that, The methods for generating the first correspondence include: Multiple initial angle values ​​are preset, and the angle difference between each preset initial angle value and the target value of the injection advance angle is obtained respectively; When each preset initial angle value is adjusted to the target value of the injection advance angle, the change in the pulse interval of the corresponding electronic fuel injection timing control device is obtained; Based on the angle difference between each preset initial angle value and the target value of the injection advance angle, and the corresponding pulse interval change, a calculation model is established for calculating the pulse interval change of the electronic fuel injection timing control device.

4. The method for determining the cetane number of diesel fuel according to claim 3, characterized in that, The calculation model for calculating the pulse interval variation of the electronic fuel injection timing control device includes: A calculation model is established using deep learning, with each preset initial angle value and / or the angle difference between each preset initial angle value and the target value of the injection advance angle as the independent variable, and the pulse interval change of the electronic fuel injection timing control device as the dependent variable.

5. A diesel cetane number measuring device, characterized in that, include: The relationship setting unit is used to pre-obtain a first correspondence between the angle adjustment value of the injection advance angle and the time change of the pulse interval of the electronic fuel injection timing control device, and a second correspondence between the rotation angle value of the control knob and the time change. The initial value acquisition unit is used to acquire the initial value of the injection advance angle of the diesel sample or diesel standard sample, and to calculate the angle difference between the initial value of the injection advance angle and the target value of the injection advance angle. The adjustment value acquisition unit is used to obtain the time change of the pulse interval of the electronic fuel injection timing control device through the first correspondence relationship, using the angle difference as a parameter. An angle value acquisition unit is used to acquire the rotation angle value through the second correspondence relationship using the time change as a parameter. An automatic adjustment unit is used to adjust the rotation angle of the control knob according to the rotation angle value through a preset adjustment mechanism, including: the adjustment mechanism generates a corresponding control command according to the rotation angle value, and drives the control knob to rotate through a stepper motor; Rotating the control knob is used to adjust the injection advance angle.

6. The diesel cetane number measuring device according to claim 5, characterized in that, The target value for the injection advance angle is 13 degrees.

7. The diesel cetane number measuring device according to claim 5, characterized in that, The methods for generating the first correspondence include: Multiple initial angle values ​​are preset, and the angle difference between each preset initial angle value and the target value of the injection advance angle is obtained respectively; When each preset initial angle value is adjusted to the target value of the injection advance angle, the change in the pulse interval of the corresponding electronic fuel injection timing control device is obtained; Based on the angle difference between each preset initial angle value and the target value of the injection advance angle, and the corresponding pulse interval change, a calculation model is established for calculating the pulse interval change of the electronic fuel injection timing control device.

8. The diesel cetane number measuring device according to claim 7, characterized in that, The computational model includes: A calculation model is established using deep learning, with each preset initial angle value and / or the angle difference between each preset initial angle value and the target value of the injection advance angle as the independent variable, and the pulse interval change of the electronic fuel injection timing control device as the dependent variable.

9. A memory, characterized in that, Includes a software program adapted by a processor to perform the steps of the diesel cetane number determination method as described in any one of claims 1 to 4.

10. A diesel cetane number measuring device, characterized in that, Includes a bus, a processor, and the memory as described in claim 9; The bus is used to connect the memory and the processor; The processor is used to execute the instruction set in the memory.

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