Control Method, Device, Fuel Injection System and Vehicle of Fuel Injector

Abstract

The present invention relates to a control method, device, fuel injection system, vehicle, computer device, storage medium and computer program product for a fuel injector. The method includes: obtaining a pressure change parameter of a fuel storage module and an injection amount of fuel injected by the fuel injector; determining an injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount and a pre-stored first mapping relationship; determining a target injection duration of the fuel injector in a next operation stage according to the injection duration compensation value; and controlling the duration of fuel injection by the fuel injector in the next operation stage to be the target injection duration according to the target injection duration. By using the method provided in this application, the injection duration of the fuel injector can be corrected, thereby improving the injection accuracy of the fuel injector and ensuring the consistency of the fuel amounts supplied to each cylinder of the engine.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel injection, and particularly to a control method and device for a fuel injector, a fuel injection system, a vehicle, a computer device, a computer storage medium, and a computer program product. Background Art

[0002] To reduce energy consumption and reduce waste gas emission pollution, and meet the requirements of energy conservation and emission regulations, the requirements for fuel injection by engines are getting higher and higher. In particular, precise fuel injection amounts and cylinder-to-cylinder consistency are required during injection. The injection consistency of each injector affects the consistency between cylinders of the engine, and the consistency between cylinders directly determines the comfort and emission performance of the vehicle.

[0003] However, in actual processes, manufacturing tolerances of components of fuel injectors are inevitable, which will result in certain deviations in the injection amounts between fuel injectors. In addition, due to long-term operation, fuel injectors will experience aging phenomena such as carbon deposition, wear, and cavitation at the nozzle to varying degrees, which will also cause deviations in the injection amounts of fuel injectors in different cylinders. Summary of the Invention

[0004] Based on this, in view of the above technical problems, it is necessary to provide a control method and device for a fuel injector, a fuel injection system, a vehicle, a computer device, a computer storage medium, and a computer program product, which correct the injection amount of the fuel injector, thereby ensuring the consistency of fuel injection by the fuel injector for each cylinder of the engine.

[0005] In a first aspect, the present application provides a control method for a fuel injector. The method includes:

[0006] Obtain the pressure change parameter of the fuel storage module and the injection amount of fuel injected by the fuel injector; wherein, the fuel injector is connected to the fuel storage module, and the pressure change parameter is used to represent the pressure change generated by the fuel storage module due to the fuel injection by the fuel injector;

[0007] Determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship; wherein, the first mapping relationship is used to represent the corresponding relationship between the pressure change parameter of the fuel storage module and the injection amount of the fuel injector when the injection duration of the fuel injector is a preset duration;

[0008] Determine the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value;

[0009] Control the fuel injection duration of the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

[0010] In one embodiment, the obtaining of the pressure change parameter of the fuel storage module and the injection amount of fuel injected by the fuel injector includes:

[0011] Obtaining the current pressure and pressure drop parameter of the fuel storage module; wherein, the pressure drop parameter is used to represent the degree of pressure drop of the fuel storage module due to the fuel injection by the fuel injector;

[0012] Determining the injection amount of fuel injected by the fuel injector according to the current pressure, the pressure drop parameter and a pre-stored second mapping relationship; wherein, the second mapping relationship is used to represent the corresponding relationship between the pressure drop parameter of the fuel storage module and the injection amount of the fuel injector when the current pressure of the fuel storage module is a preset pressure.

[0013] In one embodiment, the method further includes:

[0014] Judging whether the difference between the injection amount and the target injection amount exceeds a preset threshold range;

[0015] Wherein, the determining of the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount and a pre-stored first mapping relationship includes:

[0016] In the case that the difference between the injection amount and the target injection amount exceeds the preset threshold range, determining the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount and a pre-stored first mapping relationship.

[0017] In one embodiment, the determining of the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount and a pre-stored first mapping relationship includes:

[0018] Determining the actual injection duration of the fuel injector according to the pressure change parameter, the injection amount and the pre-stored first mapping relationship;

[0019] Determining the injection duration compensation value of the fuel injector according to the actual injection duration and the preset injection duration corresponding to the target injection amount.

[0020] In one embodiment, when the injection amount is greater than the target injection amount, the actual injection duration is in a direct proportional relationship with the injection amount and the target injection duration respectively;

[0021] When the injection amount is less than the target injection amount, the actual injection duration is in an inverse proportional relationship with the injection amount and in a direct proportional relationship with the target injection duration.

[0022] In one embodiment, when the injection amount is greater than the target injection amount, the injection duration compensation value is the difference between the actual injection duration and the preset injection duration, and the target injection duration is the difference between the preset injection duration and the injection duration compensation value;

[0023] When the injection amount is less than the target injection amount, the injection duration compensation value is the difference between the preset injection duration and the actual injection duration, and the target injection duration is the sum of the preset injection duration and the injection duration compensation value.

[0024] In a second aspect, the present application further provides a control device for a fuel injector. The device includes:

[0025] An acquisition module, configured to acquire the pressure change parameter of the fuel storage module and the injection amount of the fuel injector injecting fuel; wherein, the fuel injector is connected to the fuel storage module, and the pressure change parameter is used to represent the pressure change generated by the fuel storage module due to the fuel injector injecting fuel;

[0026] A determination module, configured to determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship; and determine the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value; wherein, the first mapping relationship is used to represent the corresponding relationship between the pressure change parameter of the fuel storage module and the injection amount of the fuel injector when the injection duration of the fuel injector is the preset duration;

[0027] A control module, configured to control the fuel injector to inject fuel for a duration of the target injection duration in the next operation stage according to the target injection duration.

[0028] In a third aspect, the present application further provides a fuel injection system, and the fuel injection system includes:

[0029] A fuel storage module, configured to store fuel;

[0030] A fuel injector, connected to the fuel storage module, configured to inject the fuel into the cylinder of the engine;

[0031] A pressure detection module, connected to the fuel storage module, configured to detect the pressure change parameter of the fuel storage module;

[0032] The control device for a fuel injector provided in the second aspect above.

[0033] Fourth aspect, the present application further provides a vehicle, which includes an engine and the fuel injection system provided in the third aspect above; wherein, the fuel injection system is used to supply fuel to the engine.

[0034] Fifth aspect, the present application further provides a computer device. The computer device includes a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of the control method of the fuel injector provided in the first aspect above are implemented.

[0035] Sixth aspect, the present application further provides a computer-readable storage medium. The computer-readable storage medium stores a computer program thereon, and when the computer program is executed by a processor, the steps of the control method of the fuel injector provided in the first aspect above are implemented.

[0036] Seventh aspect, the present application further provides a computer program product. The computer program product includes a computer program, and when the computer program is executed by a processor, the steps of the control method of the fuel injector provided in the first aspect above are implemented.

[0037] For the above control method, device, fuel injection system, vehicle, computer device, storage medium and computer program product of the fuel injector, since the first mapping relationship represents the corresponding relationship between the pressure change parameter of the fuel storage module and the injection volume of the fuel injector when the injection duration is the preset duration, therefore, the injection duration compensation value of the fuel injector injecting fuel can be determined according to the obtained pressure change parameter of the fuel storage module, the injection volume of the fuel injector and the first mapping relationship, and the target injection duration of the fuel injector in the next operation stage can be determined by using the injection duration compensation value, so as to control the fuel injector to inject fuel with the target injection duration in the next operation stage, realizing the correction of the injection duration of the fuel injector, realizing the precise control of the injection volume of the fuel injector, eliminating the injection error caused by manufacturing errors, long service life, etc., thereby improving the consistency of fuel supply to each cylinder of the engine by the fuel injector, further improving the stability of the engine, reducing the exhaust gas volume, reducing the fuel consumption and exhaust gas emission pollution, and contributing to environmental protection. Description of the Drawings

[0038] Figure 1 It is a schematic flow chart of the control method of the fuel injector provided for an embodiment;

[0039] Figure 2 It is a schematic flow chart of S101 in the control method of the fuel injector provided for an embodiment;

[0040] Figure 3 It is a schematic diagram of the relationship between the injection volume and the pressure drop parameter under different pressures provided for an embodiment;

[0041] Figure 4 Flow schematic diagram of a control method for a fuel injector provided for another embodiment;

[0042] Figure 5 Flow schematic diagram of S102 in the control method for a fuel injector provided for one embodiment;

[0043] Figure 6 Schematic diagram showing the relationship between injection quantity and the square root value of the current pressure under different injection durations provided for one embodiment;

[0044] Figure 7 Flow schematic diagram of a control method for a fuel injector provided for yet another embodiment;

[0045] Figure 8 Structural block diagram of a control device for a fuel injector provided for one embodiment;

[0046] Figure 9 Structural block diagram of a fuel injection system provided for one embodiment;

[0047] Figure 10 Structural block diagram of a fuel injection system provided for another embodiment;

[0048] Figure 11 Internal structure diagram of a computer device in one embodiment. Detailed implementation manners

[0049] In order to make the objectives, technical solutions and advantages of the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0050] As described in the background art, due to manufacturing tolerances, increased service life, etc. of fuel injectors, there will be deviations in the injection quantities between the fuel injectors of each cylinder of the engine, resulting in inconsistent fuel quantities injected into the engine combustion chamber and affecting vehicle performance. For this, the present application provides a control method, device, fuel injection system, vehicle, computer device, computer storage medium and computer program product for a fuel injector, which improves the accuracy of fuel injection by the fuel injector by correcting the injection duration of the fuel injector, and further ensures the consistency of fuel supply to each cylinder of the engine by the fuel injector.

[0051] In one embodiment, as Figure 1 shown, a control method for a fuel injector is provided, and this method includes the following S101 to S104.

[0052] S101: Obtain the pressure change parameter of the fuel storage module and the injection volume of the fuel injector injecting fuel.

[0053] The fuel injection module is used to store fuel. The fuel injector is connected to the fuel storage module, and the fuel injector is used to inject fuel. The pressure change parameter is used to represent the pressure change generated by the fuel storage module due to the fuel injector injecting fuel. The pressure change parameter includes various parameters related to the pressure of the fuel storage module, and no specific limitation is made here. Exemplarily, the pressure change parameter may include the current pressure of the fuel injection module, the pressure drop parameter, etc. Among them, the pressure drop parameter is used to represent the degree of pressure drop generated by the fuel storage module due to the fuel injector injecting fuel. In the embodiments of the present application, the injection volume is used to represent the amount of fuel injected by the fuel injector, which refers to the actual injection volume of the fuel injector.

[0054] S102: Determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection volume, and the pre-stored first mapping relationship.

[0055] Since the fuel storage module supplies fuel to the fuel injector, the fuel injection by the fuel injector will cause the fuel in the fuel storage module to decrease. The inventor found through experiments that when the injection duration of the fuel injector is a fixed value, there is a correlation between the pressure change parameter of the fuel storage module and the injection volume of the fuel injector. Based on this, the first mapping relationship can be obtained and stored in advance through experiments. The first mapping relationship is used to represent the corresponding relationship between the pressure change parameter of the fuel storage module and the injection volume of the fuel injector when the injection duration of the fuel injector is a preset duration. The first mapping relationship includes the corresponding relationships between the pressure change parameters and the injection volumes corresponding to multiple different preset durations. Among them, the preset duration is a preset fixed duration value, which can be set according to empirical values, and no specific limitation is made here. The number of preset durations included in the first mapping relationship can be set according to factors such as experimental conditions and calibration accuracy, and no specific limitation is made here either.

[0056] S103: Determine the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value.

[0057] After determining the injection duration compensation value of the fuel injector injecting fuel based on S102, the injection duration of the fuel injector in the current operation stage can be corrected according to the injection fuel duration compensation value, so as to determine the target injection duration of the fuel injector in the next operation stage.

[0058] S104: Control the fuel injection duration of the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

[0059] The control method of the fuel injector provided by the above embodiments pre-stores a first mapping relationship representing the corresponding relationship between the pressure change parameter of the fuel storage module and the injection amount of the fuel injector when the injection duration is a preset duration. Therefore, according to the obtained pressure change parameter of the fuel storage module, the injection amount of the fuel injector, and the first mapping relationship, the injection duration compensation value for the fuel injector to inject fuel is determined, and the target injection duration of the fuel injector in the next operation stage is determined using this injection duration compensation value. Thus, in the next operation stage, the fuel injector is controlled to inject fuel with the target injection duration, achieving the correction of the injection duration of the fuel injector, realizing the precise control of the injection amount of the fuel injector, eliminating the injection error caused by manufacturing errors, long service life, etc., thereby improving the consistency of fuel supply to each cylinder of the engine by the fuel injector, further improving the stability of the engine, reducing the exhaust gas volume, lowering the fuel consumption and exhaust gas emission pollution, and contributing to environmental protection.

[0060] In one embodiment, as Figure 2 shown, S101: Obtaining the pressure change parameter of the fuel storage module and the injection amount of the fuel injector to inject fuel may include the following S201 and S202.

[0061] S201: Obtain the current pressure and pressure drop parameter of the fuel storage module.

[0062] The pressure change parameter includes the current pressure and the pressure drop parameter, where the pressure drop parameter is used to represent the degree of pressure drop of the fuel storage module due to the fuel injector injecting fuel. In the embodiments of the present application, the current pressure is denoted as Prail, and the pressure drop parameter is denoted as Δp. Exemplarily, multiple current pressure measurement values and pressure drop parameter measurement values of the fuel storage module can be obtained, and then the average value is taken as the current pressure Prail and the pressure drop parameter Δp of the fuel storage module.

[0063] S202: Determine the injection amount of the fuel injector to inject fuel according to the current pressure, the pressure drop parameter, and the pre-stored second mapping relationship.

[0064] In the embodiment of the present application, the injection quantity of fuel injected by the fuel injector is denoted as Q. The inventor found through experiments that when the current pressure of the fuel storage module is a fixed value, there is a correlation between the pressure drop parameter Δp of the fuel storage module and the injection quantity Q of the fuel injector. Based on this, the second mapping relationship can be obtained and stored in advance through experiments. The second mapping relationship is used to represent the corresponding relationship between the pressure drop parameter Δp of the fuel storage module and the injection quantity Q of the fuel injector when the current pressure of the fuel storage module is a preset pressure. Herein, the preset pressure is a preset fixed pressure value, which can be set according to empirical values or experimental values and is not limited herein. The number of preset pressures included in the second mapping relationship can be set according to factors such as experimental conditions and calibration accuracy and is not limited herein either. Exemplarily, the first mapping relationship can be a fitting curve between the pressure drop parameter and the injection quantity at the preset pressure.

[0065] Specifically, the experimental setting conditions are in a stable working condition, that is, when the current pressure of the fuel storage module is a fixed preset pressure and the injection duration of the fuel injector is fixed. By manually adjusting the opening of the metering valve of the fuel supply pump, the opening of the metering valve is set to 0, the pressure drop parameter Δp of the fuel storage module is recorded, and at the same time, the injection quantity Q of the fuel injector is recorded through a single injection instrument, obtaining a set of data of the injection quantity Q and the pressure drop parameter Δp under the preset pressure of the fuel storage module. Different pressure values of the fuel storage module are set, and each set of data of the injection quantity Q and the pressure drop parameter Δp is recorded respectively. Then, a scatter plot can be drawn and each point is linearly fitted. Through experiments, it is found that when the pressure of the fuel storage module before injection is a fixed value, the injection quantity Q and the pressure drop parameter Δp are linearly related, as Figure 3 shown. The fitting lines are not completely parallel to each other, and the distances between the fitting lines are not equal either. Through analysis, it can be known that as the pressure of the fuel storage module increases, the distances between the fitting lines tend to increase. Based on this, each set of data of the injection quantity Q and the pressure drop parameter Δp corresponding to the fixed pressure value of the fuel storage module and each fitting line are used as the second mapping relationship and stored. Exemplarily, each data in the second mapping relationship can be stored according to the data structure of the MAP type.

[0066] For the control method of the fuel injector provided in the above embodiment, since the pre-stored first mapping relationship represents the corresponding relationship between the pressure drop parameter of the fuel storage module and the injection quantity of the fuel injector when the current pressure of the fuel storage module is a preset pressure, the actual injection quantity of the fuel injector can be determined by obtaining the current pressure and the pressure drop parameter of the fuel storage module and the first mapping relationship, simplifying the process of obtaining the injection quantity of the fuel injector and improving the calibration efficiency and accuracy of the fuel injector.

[0067] In one embodiment, as Figure 4As shown, another method for controlling a fuel injector is provided, and this method may include the following S401 - S406.

[0068] S401: Obtain the pressure change parameter of the fuel storage module and the injection volume of the fuel injected by the fuel injector. S401 is the same as S101 and will not be elaborated here.

[0069] S402: Determine whether the difference between the injection volume and the target injection volume exceeds a preset threshold range.

[0070] The target injection volume can be the injection volume of the fuel injected by the fuel injector set in advance, and can be specifically set according to the actual application scenario without any limitation here. The preset threshold range is set in advance and can be set according to the calibration accuracy. For example, the preset threshold range is 0, 0 - 100 mL, 0 - 200 mL, etc., without any limitation here. If the difference between the injection volume obtained in S401 and the target injection volume exceeds the preset threshold range, it indicates that there is a large deviation between the injection volume of the fuel injector and the target injection volume. In this case, the injection duration of the fuel injector can be corrected by executing the following S403 and S404. If the difference between the injection volume obtained in S401 and the target injection volume does not exceed the preset threshold range, it indicates that the deviation between the injection volume of the fuel injector and the target injection volume is small. In this case, the following S405 can be executed.

[0071] S403: Determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection volume, and the first mapping relationship stored in advance. S403 is the same as S102 and will not be elaborated here.

[0072] S404: Determine the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value. S403 is the same as S103 and will not be elaborated here.

[0073] S405: Determine that the target injection duration of the fuel injector in the next operation stage is the injection duration of the fuel injector in the current operation stage.

[0074] If the difference between the injection volume obtained in S401 and the target injection volume does not exceed the preset threshold range, it indicates that the deviation between the injection volume of the fuel injector and the target injection volume is small. In this case, it is not necessary to correct the injection duration of the fuel injector. Therefore, the injection duration of the fuel injector in the current operation stage can be directly used as the target injection duration of the fuel injector in the next operation stage.

[0075] S406: Control the duration of the fuel injected by the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

[0076] The control method of the fuel injector provided in the above embodiments determines whether there is a large deviation between the injection amount of the fuel injector and the target injection amount by comparing the injection amount of the fuel injector with the target injection amount. Thus, when there is a large deviation between the injection amount and the target injection amount, the injection duration of the fuel injector can be corrected to reduce the deviation between the injection amount of the fuel injector and the target injection amount, and further achieve precise control of the injection amount of the fuel injector, ensuring the consistency of the fuel amount supplied by the fuel injector to each cylinder of the engine.

[0077] In one embodiment, as Figure 5 shown, S102: Determine the injection duration compensation value of the fuel injector according to the pressure change parameter, injection amount, and the pre-stored first mapping relationship, which may include the following S501 and S502.

[0078] S501: Determine the actual injection duration of the fuel injector according to the pressure change parameter, injection amount, and the pre-stored first mapping relationship.

[0079] Exemplarily, according to the pressure change parameter of the fuel storage module, the injection amount of the fuel injector, and the pre-stored first mapping relationship, the actual injection duration of the fuel injector can be determined by using the interpolation method. The actual injection duration is used to represent the injection duration corresponding to the injection amount Q of the fuel injector. Among them, the interpolation method can be linear interpolation, Newton interpolation method, Lagrange interpolation method, etc. In practice, the method with the best calculation accuracy can be selected for calculation, and no specific limitation is made here.

[0080] The inventor further learned through experiments that when the injection duration is a fixed value, there is a linear relationship between the square root value of the current pressure of the fuel storage module and the injection amount Q of the fuel injection amount. Based on this, during the experiment, the preset injection durations of the fuel injector are set to different preset injection durations, and the relationship curves between the injection amount Q and the square root value of the current pressure of the fuel storage module corresponding to different preset injection durations t1, t2, t3,..., tn are obtained respectively, where t1 > t2 > t3 >... > tn, and n is a positive integer greater than 1. Further, when the interval between each preset injection duration does not exceed 100 us (for example, t1 - t2 ≤ 100 us), the linear difference calculation can be performed between the preset injection durations and the injection amounts between adjacent preset injection durations. Exemplarily, taking n = 4 as an example, Figure 6 the relationship curves between the square root value of the current pressure of the fuel storage module corresponding to each group of t1, t2, t3, and t4 and the injection amount Q of the fuel injection amount are given.

[0081] Based on the above, exemplarily, the pressure change parameter may include the current pressure of the fuel storage module. Specifically, the actual injection duration of the fuel injector can be determined according to the square root value of the current pressure of the fuel storage module, the injection amount of the fuel injector, and the first mapping relationship.

[0082] S502: Determine the injection duration compensation value of the fuel injector according to the preset injection duration corresponding to the actual injection duration and the target injection amount.

[0083] The preset injection duration corresponds to the target injection amount. Specifically, when the injection rate of the fuel injector is fixed, when the injection duration of the fuel injector is set as the preset injection duration, the fuel injector corresponds to a target injection amount.

[0084] The control method of the fuel injector provided in the above embodiment can determine the actual injection duration of the fuel injector according to the pressure change parameter, the injection amount, and the first mapping relationship, then determine the injection duration compensation value of the fuel injector according to the actual injection duration and the preset injection duration, and then correct the injection duration of the fuel injector based on the injection duration compensation value, so as to realize the correction of the injection amount of the fuel injector, improve the injection accuracy of the fuel injector, and ensure the consistency of the fuel amount in each cylinder of the engine.

[0085] In one embodiment, when the injection amount of the fuel injector is greater than the target injection amount, the actual injection duration is directly proportional to the injection amount and the target injection duration. When the injection amount of the fuel injector is less than the target injection amount, the actual injection duration is inversely proportional to the injection amount and directly proportional to the target injection duration.

[0086] In one embodiment, when the injection amount is greater than the target injection amount, the injection duration compensation value is the difference between the actual injection duration and the preset injection duration, and the target injection duration is the difference between the preset injection duration and the injection duration compensation value. When the injection amount is less than the target injection amount, the injection duration compensation value is the difference between the preset injection duration and the actual injection duration, and the target injection duration is the sum of the preset injection duration and the injection duration compensation value.

[0087] For better understanding, taking Figure 6 the provided schematic diagram as an example, the relationship between the actual injection duration of the fuel injector, the injection amount of the fuel injector, and the target injection duration, as well as the relationship between the injection duration compensation value of the fuel injector, the actual injection duration, and the preset injection duration are described. In Figure 6 it, the preset injection duration is set as t2, and the square root value of the current pressure of the fuel storage module is Pi. In this case, the target injection amount Qobj is Q2.

[0088] If the injection amount Qi of the fuel injector (i.e.,Figure 6 If the value of Qi in the figure is greater than the target injection amount Qobj, it is determined that the actual injection duration ti of the fuel injector is between the preset injection durations t1 and t2, and a linear interpolation is performed between t1 and t2 to obtain the actual injection duration ti as follows:

[0089]

[0090] Where ti represents the actual injection time of the fuel injector, Qi represents the injection amount of the fuel injector, Q1 represents the injection amount corresponding to the preset injection time of the fuel injector being t1 and the square root value of the current pressure of the fuel storage module being Pi, Qobj represents the target injection amount, and t1 and t2 are both preset injection times and known. Based on this, the injection time compensation value of the fuel injector can be determined to be (t i -t2), the target injection duration t of the fuel injector in the next operation stage is:

[0091]

[0092] If the injection amount Qi (i.e. Figure 6 When the actual injection time ti of the fuel injector is between the preset injection time t2 and t3, the actual injection time ti is obtained by linear interpolation between t2 and t3 as follows:

[0093]

[0094] Where ti represents the actual injection time of the fuel injector, Qi represents the injection amount of the fuel injector, Q3 represents the injection amount corresponding to the preset injection time of the fuel injector being t3 and the square root value of the current pressure of the fuel storage module being Pi, Qobj represents the target injection amount, and t2 and t3 are both preset injection times and known. Based on this, it can be determined that the injection time compensation value of the fuel injector is (t2-t i ), the target injection duration t of the fuel injector in the next operation stage is:

[0095]

[0096] In one embodiment, Figure 7 As shown, another fuel injector control method is provided, the method includes the following S701-S708.

[0097] S701: Obtain the current pressure Prail and pressure drop parameter Δp of the fuel storage module.

[0098] S702: Determine the injection quantity Qi of fuel injected by the fuel injector according to the current pressure Prail, the pressure drop parameter Δp, and the pre-stored second mapping relationship. The second mapping relationship can be referred to Figure 3 .

[0099] S703: Determine whether the injection quantity Qi is equal to the target injection quantity Qobj. If so, execute S704 - S706. If not, execute S707.

[0100] S704: Determine the actual injection duration ti of the fuel injector according to the square root value Pi of the current pressure of the fuel storage module, the injection quantity Qi of the fuel injector, and the pre-stored first mapping relationship. The first mapping relationship can be referred to Figure 6 , and the calculation process of the actual injection duration ti can be referred to the above formula (1) or (3).

[0101] S705: Determine the injection duration compensation value of the fuel injector according to the actual injection duration ti and the preset injection duration t2 corresponding to the target injection quantity Qobj.

[0102] S706: Determine the target injection duration t of the fuel injector in the next operation stage according to the injection duration compensation value. The calculation process of the target injection duration t can be referred to the above formula (2) or (4).

[0103] S707: Determine that the target injection duration of the fuel injector in the next operation stage is the injection duration of the current operation stage of the fuel injector.

[0104] S708: Control the duration of fuel injection by the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

[0105] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are shown in sequence according to the arrows, these steps do not necessarily have to be executed in the order indicated by the arrows. Unless there is a clear indication in this article, the execution of these steps has no strict order limit, and these steps can be executed in other orders. Moreover, at least some of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages do not necessarily have to be executed at the same moment, but can be executed at different moments. The execution order of these steps or stages does not necessarily have to be sequential, but can be executed alternately or in turn with at least some of the steps or stages in other steps or other steps.

[0106] Based on the same inventive concept, an embodiment of the present application further provides a control device for a fuel injector for implementing the control method of the fuel injector involved above. The solution provided by this device for solving problems is similar to the solution described in the above method. Therefore, the specific limitations in one or more embodiments of the control device for the fuel injector provided below can refer to the limitations on the control method of the fuel injector in the above text, and will not be elaborated here.

[0107] In one embodiment, as Figure 8 shown, a control device for a fuel injector is provided. The control device 800 for the fuel injector includes an acquisition module 801, a determination module 802, and a control module 803.

[0108] Among them, the acquisition module 801 is used to acquire the pressure change parameter of the fuel storage module and the injection amount of the fuel injected by the fuel injector; wherein, the fuel injector is connected to the fuel storage module, and the pressure change parameter is used to represent the pressure change generated by the fuel storage module due to the fuel injection of the fuel injector.

[0109] The determination module 802 is used to determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship; and determine the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value; wherein, the first mapping relationship is used to represent the corresponding relationship between the pressure change parameter of the fuel storage module and the injection amount of the fuel injector when the injection duration of the fuel injector is a preset duration.

[0110] The control module 803 is used to control the fuel injection duration of the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

[0111] For the control device of the fuel injector provided in the above embodiment, since the first mapping relationship represents the corresponding relationship between the pressure change parameter of the fuel storage module and the injection amount of the fuel injector when the injection duration is a preset duration, therefore, the injection duration compensation value of the fuel injector can be determined according to the acquired pressure change parameter of the fuel storage module, the injection amount of the fuel injector, and the first mapping relationship, and the target injection duration of the fuel injector in the next operation stage can be determined by using this injection duration compensation value, so as to control the fuel injection of the fuel injector with the target injection duration in the next operation stage, realizing the correction of the injection duration of the fuel injector, achieving the precise control of the injection amount of the fuel injector, eliminating the injection error caused by manufacturing errors, long service life, etc., thereby improving the consistency of fuel supply to each cylinder of the engine by the fuel injector, further improving the stability of the engine, reducing the exhaust gas volume, reducing the fuel consumption and exhaust gas emission pollution, and contributing to environmental protection.

[0112] In one embodiment, the acquisition module is further configured to acquire the current pressure and pressure drop parameter of the fuel storage module; wherein, the pressure drop parameter is used to represent the degree of pressure drop of the fuel storage module due to fuel injection by the fuel injector; according to the current pressure, the pressure drop parameter and a pre-stored second mapping relationship, determine the injection amount of fuel injected by the fuel injector; wherein, the second mapping relationship is used to represent the corresponding relationship between the pressure drop parameter of the fuel storage module and the injection amount of the fuel injector when the current pressure of the fuel storage module is a preset pressure.

[0113] In one embodiment, the control device of the fuel injector further includes a judgment module, and the judgment module is used to judge whether the difference between the injection amount and the target injection amount exceeds a preset threshold range. The determination module is further configured to, when the difference between the injection amount and the target injection amount exceeds the preset threshold range, determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount and a pre-stored first mapping relationship.

[0114] In one embodiment, the determination module is further configured to determine the actual injection duration of the fuel injector according to the pressure change parameter, the injection amount and the pre-stored first mapping relationship; and determine the injection duration compensation value of the fuel injector according to the actual injection duration and the preset injection duration corresponding to the target injection amount.

[0115] In one embodiment, when the injection amount is greater than the target injection amount, the actual injection duration is directly proportional to the injection amount and the target injection duration respectively; when the injection amount is less than the target injection amount, the actual injection duration is inversely proportional to the injection amount and directly proportional to the target injection duration.

[0116] In one embodiment, when the injection amount is greater than the target injection amount, the injection duration compensation value is the difference between the actual injection duration and the preset injection duration, and the target injection duration is the difference between the preset injection duration and the injection duration compensation value; when the injection amount is less than the target injection amount, the injection duration compensation value is the difference between the preset injection duration and the actual injection duration, and the target injection duration is the sum of the preset injection duration and the injection duration compensation value.

[0117] Each module in the control device of the fuel injector described above can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above modules can be embedded in the processor of the computer device in hardware form or independent of the processor, or stored in the memory of the computer device in software form, so that the processor can call and execute the operations corresponding to each of the above modules.

[0118] Based on the control device of the fuel injector provided in each of the above embodiments, the embodiments of the present application further provide a fuel injection system related to the control device of the fuel injector described above.

[0119] In one embodiment, as Figure 9 shown, a fuel injection system is provided. The system includes a fuel storage module 901, a fuel injector 902, a pressure detection module 903, and the control device 904 of the fuel injector provided in any of the above embodiments.

[0120] Among them, the fuel storage module 901 is used to store fuel. Exemplarily, the fuel storage module 901 can be a high-pressure memory. The fuel injector 902 is connected to the fuel storage module, and the fuel injector 902 is used to inject fuel into the cylinder of the engine. Exemplarily, the fuel injection system can include multiple fuel injectors 902, which are respectively connected to the cylinders of the engine and inject fuel into the corresponding cylinders. The pressure detection module 903 is connected to the fuel storage module, and the pressure detection module 903 is used to detect the pressure change parameter of the fuel storage module. Exemplarily, the pressure detection module 903 can be a pressure sensor. For the control device 904 of the fuel injector, reference can be made to the relevant content described in the above embodiments, which will not be elaborated here. Exemplarily, the control device 904 of the fuel injector can be an Electronic Control Unit (ECU).

[0121] Optionally, the fuel injection system may further include a fuel supply pump, which is connected to the fuel storage module and used to supply fuel to the fuel storage module.

[0122] In one embodiment, as Figure 10 shown, another fuel injection system is provided. The fuel injection system includes a fuel supply pump 1001, a high-pressure memory 1002, multiple fuel injectors 1003, a pressure sensor 1004, and an ECU 1005.

[0123] Among them, the fuel supply pump 1001 supplies fuel to the high-pressure memory 1002. Controlled by the ECU 1005, the fuel is injected from the fuel injector 1003 into the engine cylinder. The pressure sensor 1004 collects the pressure change in the high-pressure memory 1002. In the ECU 1005, the pressure drop value during the injection of the current fuel injector 1003 is calculated. Usually, it is necessary to collect multiple times and average the multiple pressure drop values to make the actual value more accurate. Then, according to the relationship between the pressure drop value ΔP and the injection quantity Q, the real-time injection quantity of the current fuel injector 1003 is obtained. The injection quantity Q is compared with the target injection quantity. When there is a deviation between the two, through the square root value of the current pressure of the high-pressure memory 1002 and the relationship with the injection quantity Q, judge and calculate the injection duration compensation value for the fuel injector 1003, and then assign the calculated injection duration compensation value to the current fuel injector 1003 in the next operation stage, and compensate the injection duration of each cylinder's fuel injector 1003 to improve the consistency of the injection quantity of each cylinder.

[0124] In one embodiment, a vehicle is provided. The vehicle includes an engine and the fuel injection system provided in any of the above embodiments. Among them, the fuel injection system is used to supply fuel to the engine. Based on this, by correcting the injection duration of each fuel injector, the injection quantity of each cylinder of the engine is corrected, the consistency of the injection quantity of each cylinder's fuel injector is improved, the engine works smoothly, fuel consumption is reduced, and waste gas emission pollution is reduced.

[0125] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as Figure 11 shown. The computer device includes a processor, a memory, and a network interface connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store XX data. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, it realizes a control method for a fuel injector.

[0126] Those skilled in the art can understand that Figure 11 the structure shown in

[0127] In one embodiment, a computer device is provided, including a memory and a processor. A computer program is stored in the memory. When the processor executes the computer program, the following steps are implemented:

[0128] Obtain the pressure change parameter of the fuel storage module and the injection amount of fuel injected by the fuel injector; wherein, the fuel injector is connected to the fuel storage module, and the pressure change parameter is used to represent the pressure change generated by the fuel storage module due to the fuel injection of the fuel injector;

[0129] Determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship; wherein, the first mapping relationship is used to represent the corresponding relationship between the pressure change parameter of the fuel storage module and the injection amount of the fuel injector when the injection duration of the fuel injector is a preset duration;

[0130] Determine the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value;

[0131] Control the fuel injection duration of the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

[0132] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0133] Obtain the current pressure and pressure drop parameter of the fuel storage module; wherein, the pressure drop parameter is used to represent the degree of pressure drop generated by the fuel storage module due to the fuel injection of the fuel injector;

[0134] Determine the injection amount of fuel injected by the fuel injector according to the current pressure, the pressure drop parameter, and a pre-stored second mapping relationship; wherein, the second mapping relationship is used to represent the corresponding relationship between the pressure drop parameter of the fuel storage module and the injection amount of the fuel injector when the current pressure of the fuel storage module is a preset pressure.

[0135] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0136] Judge whether the difference between the injection amount and the target injection amount exceeds a preset threshold range;

[0137] In the case that the difference between the injection amount and the target injection amount exceeds the preset threshold range, determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship.

[0138] In one embodiment, when the processor executes the computer program, the following steps are further implemented:

[0139] Determine the actual injection duration of the fuel injector according to the pressure change parameter, the injection quantity, and the pre-stored first mapping relationship;

[0140] Determine the injection duration compensation value of the fuel injector according to the preset injection duration corresponding to the actual injection duration and the target injection quantity.

[0141] In one embodiment, when the injection quantity is greater than the target injection quantity, the actual injection duration is directly proportional to the injection quantity and the target injection duration respectively; when the injection quantity is less than the target injection quantity, the actual injection duration is inversely proportional to the injection quantity, and the actual injection duration is directly proportional to the target injection duration.

[0142] In one embodiment, when the injection quantity is greater than the target injection quantity, the injection duration compensation value is the difference between the actual injection duration and the preset injection duration, and the target injection duration is the difference between the preset injection duration and the injection duration compensation value; when the injection quantity is less than the target injection quantity, the injection duration compensation value is the difference between the preset injection duration and the actual injection duration, and the target injection duration is the sum of the preset injection duration and the injection duration compensation value.

[0143] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0144] Obtain the pressure change parameter of the fuel storage module and the injection quantity of the fuel injector injecting fuel; wherein, the fuel injector is connected to the fuel storage module, and the pressure change parameter is used to represent the pressure change generated by the fuel storage module due to the fuel injector injecting fuel;

[0145] Determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection quantity, and the pre-stored first mapping relationship; wherein, the first mapping relationship is used to represent the corresponding relationship between the pressure change parameter of the fuel storage module and the injection quantity of the fuel injector when the injection duration of the fuel injector is a preset duration;

[0146] Determine the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value;

[0147] Control the fuel injection duration of the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

[0148] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0149] Obtain the current pressure and pressure drop parameter of the fuel storage module; wherein, the pressure drop parameter is used to represent the degree of pressure drop of the fuel storage module due to fuel injection by the fuel injector;

[0150] Determine the fuel injection amount of the fuel injector according to the current pressure, the pressure drop parameter, and a pre-stored second mapping relationship; wherein, the second mapping relationship is used to represent the corresponding relationship between the pressure drop parameter of the fuel storage module and the fuel injection amount of the fuel injector when the current pressure of the fuel storage module is a preset pressure.

[0151] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0152] Judge whether the difference between the injection amount and the target injection amount exceeds a preset threshold range;

[0153] In the case where the difference between the injection amount and the target injection amount exceeds the preset threshold range, determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship.

[0154] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0155] Determine the actual injection duration of the fuel injector according to the pressure change parameter, the injection amount, and the pre-stored first mapping relationship;

[0156] Determine the injection duration compensation value of the fuel injector according to the actual injection duration and the preset injection duration corresponding to the target injection amount.

[0157] In one embodiment, when the injection amount is greater than the target injection amount, the actual injection duration is directly proportional to the injection amount and the target injection duration respectively; when the injection amount is less than the target injection amount, the actual injection duration is inversely proportional to the injection amount and directly proportional to the target injection duration.

[0158] In one embodiment, when the injection amount is greater than the target injection amount, the injection duration compensation value is the difference between the actual injection duration and the preset injection duration, and the target injection duration is the difference between the preset injection duration and the injection duration compensation value; when the injection amount is less than the target injection amount, the injection duration compensation value is the difference between the preset injection duration and the actual injection duration, and the target injection duration is the sum of the preset injection duration and the injection duration compensation value.

[0159] In one embodiment, a computer program product is provided, including a computer program, which when executed by a processor, implements the following steps:

[0160] Obtain the pressure change parameter of the fuel storage module and the injection amount of fuel injected by the fuel injector; wherein, the fuel injector is connected to the fuel storage module, and the pressure change parameter is used to represent the pressure change generated by the fuel storage module due to the fuel injection of the fuel injector;

[0161] Determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount and a pre-stored first mapping relationship; wherein, the first mapping relationship is used to represent the corresponding relationship between the pressure change parameter of the fuel storage module and the injection amount of the fuel injector when the injection duration of the fuel injector is a preset duration;

[0162] Determine the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value;

[0163] Control the fuel injection duration of the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

[0164] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0165] Obtain the current pressure and pressure drop parameter of the fuel storage module; wherein, the pressure drop parameter is used to represent the degree of pressure drop generated by the fuel storage module due to the fuel injection of the fuel injector;

[0166] Determine the injection amount of fuel injected by the fuel injector according to the current pressure, the pressure drop parameter and a pre-stored second mapping relationship; wherein, the second mapping relationship is used to represent the corresponding relationship between the pressure drop parameter of the fuel storage module and the injection amount of the fuel injector when the current pressure of the fuel storage module is a preset pressure.

[0167] In one embodiment, when the computer program is executed by the processor, the following steps are further implemented:

[0168] Determine whether the difference between the injection amount and the target injection amount exceeds a preset threshold range;

[0169] When the difference between the injection amount and the target injection amount exceeds the preset threshold range, determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship.

[0170] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0171] Determine the actual injection duration of the fuel injector according to the pressure change parameter, the injection amount, and the pre-stored first mapping relationship;

[0172] Determine the injection duration compensation value of the fuel injector according to the actual injection duration and the preset injection duration corresponding to the target injection amount.

[0173] In one embodiment, when the injection amount is greater than the target injection amount, the actual injection duration is directly proportional to the injection amount and the target injection duration respectively; when the injection amount is less than the target injection amount, the actual injection duration is inversely proportional to the injection amount and directly proportional to the target injection duration.

[0174] In one embodiment, when the injection amount is greater than the target injection amount, the injection duration compensation value is the difference between the actual injection duration and the preset injection duration, and the target injection duration is the difference between the preset injection duration and the injection duration compensation value; when the injection amount is less than the target injection amount, the injection duration compensation value is the difference between the preset injection duration and the actual injection duration, and the target injection duration is the sum of the preset injection duration and the injection duration compensation value.

[0175] It should be noted that the data involved in this application (including but not limited to data for analysis, stored data, displayed data, etc.) are all information and data authorized by the user or fully authorized by all parties.

[0176] Those of ordinary skill in the art can understand that all or part of the processes in the above-described embodiment methods can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above various methods. Among them, any reference to a memory, database, or other medium used in the various embodiments provided in the present application can include at least one of non-volatile and volatile memories. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the various embodiments provided in the present application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., without limitation. The processors involved in the various embodiments provided in the present application can be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, data processing logics based on quantum computing, etc., without limitation.

[0177] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0178] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A control method for a fuel injector, characterized in that, The method includes: Obtaining the pressure change parameter of the fuel storage module and the injection amount of fuel injected by the fuel injector; wherein, the fuel injector is connected to the fuel storage module, and the pressure change parameter is used to represent the pressure change generated by the fuel injector injecting fuel in the fuel storage module; the pressure change parameter includes the current pressure and the pressure drop parameter, and the pressure drop parameter is used to represent the degree of pressure drop generated by the fuel injector injecting fuel in the fuel storage module; the current pressure is the average value of multiple current pressure measurement values of the fuel storage module; the pressure drop parameter is the average value of multiple pressure drop parameter measurement values of the fuel storage module; Determining the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship; wherein, the first mapping relationship is used to represent the corresponding relationship between the pressure change parameter of the fuel storage module and the injection amount of the fuel injector when the injection duration of the fuel injector is a preset duration; Determining the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value; Controlling the fuel injection duration of the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

2. The control method of the fuel injector according to claim 1, characterized in that The obtaining the pressure change parameter of the fuel storage module and the injection amount of fuel injected by the fuel injector includes: Obtaining the current pressure and the pressure drop parameter of the fuel storage module; Determining the injection amount of fuel injected by the fuel injector according to the current pressure, the pressure drop parameter, and a pre-stored second mapping relationship; wherein, the second mapping relationship is used to represent the corresponding relationship between the pressure drop parameter of the fuel storage module and the injection amount of the fuel injector when the current pressure of the fuel storage module is a preset pressure.

3. The control method of the fuel injector according to claim 1, characterized in that The method further includes: Judging whether the difference between the injection amount and the target injection amount exceeds a preset threshold range; Wherein, the determining the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship includes: In the case where the difference between the injection amount and the target injection amount exceeds the preset threshold range, determining the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship.

4. The control method of the fuel injector according to claim 1, wherein, The determining the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship includes: Determining the actual injection duration of the fuel injector according to the pressure change parameter, the injection amount, and the pre-stored first mapping relationship; Determining the injection duration compensation value of the fuel injector according to the actual injection duration and the preset injection duration corresponding to the target injection amount.

5. The control method of the fuel injector according to claim 4, characterized in that, In the case where the injection amount is greater than the target injection amount, the actual injection duration is directly proportional to the injection amount and the target injection duration respectively; In the case where the injection amount is less than the target injection amount, the actual injection duration is inversely proportional to the injection amount and directly proportional to the target injection duration.

6. The control method of the fuel injector according to claim 4, characterized in that, When the injection amount is greater than the target injection amount, the injection duration compensation value is the difference between the actual injection duration and the preset injection duration, and the target injection duration is the difference between the preset injection duration and the injection duration compensation value; When the injection amount is less than the target injection amount, the injection duration compensation value is the difference between the preset injection duration and the actual injection duration, and the target injection duration is the sum of the preset injection duration and the injection duration compensation value.

7. A control device for a fuel injector, characterized in that, The device includes: An acquisition module, configured to acquire the pressure change parameter of the fuel storage module and the injection amount of the fuel injector injecting fuel; wherein, the fuel injector is connected to the fuel storage module, and the pressure change parameter is used to represent the pressure change generated by the fuel storage module due to the fuel injector injecting fuel; the pressure change parameter includes the current pressure and the pressure drop parameter, and the pressure drop parameter is used to represent the degree of pressure drop generated by the fuel storage module due to the fuel injector injecting fuel; the current pressure is the average value of multiple current pressure measurement values of the fuel storage module; the pressure drop parameter is the average value of multiple pressure drop parameter measurement values of the fuel storage module; A determination module, configured to determine the injection duration compensation value of the fuel injector according to the pressure change parameter, the injection amount, and a pre-stored first mapping relationship; and determine the target injection duration of the fuel injector in the next operation stage according to the injection duration compensation value; wherein, the first mapping relationship is used to represent the corresponding relationship between the pressure change parameter of the fuel storage module and the injection amount of the fuel injector when the injection duration of the fuel injector is the preset duration; A control module, configured to control the fuel injection duration of the fuel injector in the next operation stage to be the target injection duration according to the target injection duration.

8. A fuel injection system, characterized in that, The fuel injection system includes: A fuel storage module, configured to store fuel; A fuel injector, connected to the fuel storage module, configured to inject the fuel into the cylinder of the engine; A pressure detection module, connected to the fuel storage module, configured to detect the pressure change parameter of the fuel storage module; the pressure change parameter includes the current pressure and the pressure drop parameter, and the pressure drop parameter is used to represent the degree of pressure drop generated by the fuel storage module due to the fuel injector injecting fuel; the current pressure is the average value of multiple current pressure measurement values of the fuel storage module; the pressure drop parameter is the average value of multiple pressure drop parameter measurement values of the fuel storage module; The control device of the fuel injector according to claim 7.

9. A vehicle, characterized in that, The vehicle includes an engine and the fuel injection system according to claim 8; wherein, the fuel injection system is used to supply fuel to the engine.

10. A computer device, comprising a memory and a processor, the memory storing a computer program, characterized in that, When the processor executes the computer program, the steps of the control method of the fuel injector according to any one of claims 1 to 6 are implemented.

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