Injection rail pressure correction method and device, electronic equipment and storage medium

Abstract

The invention provides an injection rail pressure correction method and device, electronic equipment and a storage medium, belongs to the technical field of diesel engine fuel system control, and is applied to a high-pressure common rail fuel system which comprises a current working cylinder and a plurality of to-be-working cylinders. The method comprises the steps that a target cylinder, corresponding to the current working cylinder, in the multiple to-be-worked cylinders is determined; determining a rail pressure correction value of the target cylinder during last injection; the reference rail pressure of the current working cylinder is obtained based on a rail pressure sensor arranged at the fixed position; and the sum of the reference rail pressure and the rail pressure correction value serves as the injection rail pressure of the current working cylinder during next injection. The method does not need to design dynamic interruption to collect the rail pressure, avoids the problems of conflict and the like existing in dynamic interruption, improves the safety during injection, improves the accuracy of the finally determined injection rail pressure, and further improves the injection precision of fuel oil.

Description

Technical Field

[0001] The present invention relates to the technical field of diesel engine fuel system control, and in particular to an injection rail pressure correction method, device, electronic equipment and storage medium. Background Art

[0002] Due to the advantages of high injection pressure, precise injection control, and multiple injection technology of the high-pressure common rail fuel system, it has now become the mainstream technology of diesel engine fuel system. The calculation of the injection pulse width of the injector directly affects the injection accuracy of the fuel. In the calculation process of the injection pulse width of the injector, the injection rail pressure is the key factor affecting the injection accuracy.

[0003] In the prior art, the method of determining the injection rail pressure is as in CN10301618A, which sets a dynamic injection switch and controls the dynamic injection switch to close before each injection to collect the current rail pressure. This solution collects and calculates the actual rail pressure before each injection of each cylinder, and uses this rail pressure as the injection rail pressure to calculate the pulse width of each injection. Although this solution can obtain a more accurate injection rail pressure, on the one hand, it requires the basic software (Basic Software, BSW) to develop dynamic interrupts, which increases the difficulty of development. When there are many dynamic interrupt tasks, the expected tasks cannot be completed within the interrupt time, which will lead to unexpected consequences (such as: unexpected injection pulse width, causing the engine to run away or stall).

[0004] Therefore, there is an urgent need to provide an injection rail pressure correction method, device, electronic device and storage medium, which are used to ensure the accuracy of the injection rail pressure while avoiding uncontrolled injection pulse width, thereby improving injection safety and reliability. Summary of the invention

[0005] In view of this, it is necessary to provide an injection rail pressure correction method, device, electronic device and storage medium to solve the technical problems existing in the prior art that dynamic interrupts are required for basic software development and too many interrupts make it impossible to ensure safety during the injection process.

[0006] On the one hand, in order to solve the above technical problems, the present invention provides an injection rail pressure correction method, which is applied to a high-pressure common rail fuel system, wherein the high-pressure common rail fuel system includes a current working cylinder and a plurality of cylinders to be worked; the method includes: Determine a target cylinder corresponding to the current working cylinder among the plurality of cylinders to be worked; Determining a rail pressure correction value of the target cylinder at the last injection; obtaining a reference rail pressure of the current working cylinder based on a rail pressure sensor disposed at the fixed position; The sum of the reference rail pressure and the rail pressure correction value is used as the injection rail pressure during the next injection of the current working cylinder.

[0007] In a possible implementation, the high-pressure common rail fuel system is a synchronous pump / injection system or an asynchronous pump / injection system; then determining a target cylinder among the multiple cylinders to be worked that has the same operating characteristic as the current working cylinder includes: When the high-pressure common rail fuel system is a synchronous pump / injection system, the target cylinder is the first cylinder; When the high-pressure common rail fuel system is an asynchronous pumping / injection system, the injection characteristics of the high-pressure common rail fuel system are obtained, and the target cylinder is determined based on the correlation of the injection characteristics.

[0008] In a possible implementation, the injection characteristics include an oil pumping cycle, an oil injection cycle, an interval angle between two cylinders, and an ignition sequence.

[0009] In a possible implementation, determining the rail pressure correction value of the target cylinder at the last injection includes: Acquire at least one sample rail pressure collected by a rail pressure sensor during the last injection of the target cylinder; determining a rail pressure average of the at least one sampled rail pressure; A target reference rail pressure at the last injection of the target cylinder is acquired based on the rail pressure sensor disposed at the fixed position, and a difference between the target reference rail pressure and the rail pressure average is used as the rail pressure correction value.

[0010] In a possible implementation manner, a sampling interval of the at least one sampled rail pressure is 0.1 milliseconds.

[0011] In a possible implementation, obtaining the reference rail pressure of the current working cylinder based on the rail pressure sensor disposed at the fixed position includes: A peak rail pressure or an average rail pressure of the current working cylinder is obtained based on a rail pressure sensor arranged at the fixed position, and the peak rail pressure or the average rail pressure is used as the reference rail pressure.

[0012] In a possible implementation, the method further includes: An injection pulse width is determined based on the injection rail pressure, and a pulse width of the next injection of the current working cylinder is controlled to be the injection pulse width.

[0013] On the other hand, the present invention further provides an injection rail pressure correction device, which is applied to a high-pressure common rail fuel system, wherein the high-pressure common rail fuel system includes a current working cylinder and a plurality of cylinders to be worked; the device includes: a target cylinder determining unit, configured to determine a target cylinder corresponding to the current working cylinder among the plurality of cylinders to be worked; a rail pressure correction value determination unit, used to determine the rail pressure correction value of the target cylinder at the last injection; a reference rail pressure obtaining unit, configured to obtain the reference rail pressure of the current working cylinder based on a rail pressure sensor disposed at the fixed position; The injection rail pressure correction unit is used to use the sum of the reference rail pressure and the rail pressure correction value as the injection rail pressure for the next injection of the current working cylinder.

[0014] On the other hand, the present invention also provides an electronic device, including a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory, and is used to execute the program stored in the memory to implement the steps of the injection rail pressure correction method described in any one of the possible implementations above.

[0015] On the other hand, the present invention further provides a computer-readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps in the injection rail pressure correction method described in any possible implementation manner are implemented.

[0016] The beneficial effects of the present invention are as follows: the injection rail pressure correction method provided by the present invention can obtain the reference rail pressure of the current working cylinder only through the rail pressure sensor set at a fixed position, without the need to design a dynamic interruption to collect the rail pressure, thus avoiding problems such as conflicts in dynamic interruptions, thereby avoiding safety issues caused by uncontrolled injection pulse width, and improving the safety during injection. In addition, the development difficulty of BSW is reduced, the project development cycle is shortened, the BSW function is simplified, and its reliability is improved.

[0017] Furthermore, the present invention determines the target cylinder corresponding to the current working cylinder through the correlation between the cylinders in the high-pressure common rail fuel system, and determines the rail pressure correction value of the target cylinder at the last injection, determines the injection rail pressure at the next injection of the current working cylinder based on the rail pressure correction value, and corrects the reference rail pressure based on the rail pressure correction value, thereby improving the accuracy of the injection rail pressure finally determined, and further improving the injection accuracy of the fuel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1A schematic flow chart of an embodiment of the injection rail pressure correction method provided by the present invention; Figure 2 For the present invention Figure 1 A schematic flow chart of an embodiment of step S102; Figure 3 A schematic structural diagram of an embodiment of the injection rail pressure correction device provided by the present invention; Figure 4 A schematic structural diagram of an embodiment of an electronic device provided by the present invention. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0021] It should be understood that the schematic drawings are not drawn to scale. The flowchart used in the present invention shows the operations implemented according to some embodiments of the present invention. It should be understood that the operations of the flowchart can be implemented out of order, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art, under the guidance of the content of the present invention, can add one or more other operations to the flowchart, and can also remove one or more operations from the flowchart. Some of the block diagrams shown in the accompanying drawings are functional entities, which do not necessarily correspond to physically or logically independent entities. These functional entities can be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor systems and / or microcontroller systems.

[0022] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0023] The present invention provides an injection rail pressure correction method, device, electronic device and storage medium, which are respectively described below.

[0024] The embodiment of the present invention provides an injection rail pressure correction method, which is applied to a high-pressure common rail fuel system. The high-pressure common rail fuel system includes a current working cylinder and a plurality of cylinders to be worked, such as Figure 1As shown, the injection rail pressure correction method includes: S101, determining a target cylinder corresponding to a current working cylinder among a plurality of cylinders to be worked; S102, determining a rail pressure correction value of the target cylinder at the time of the last injection; S103, obtaining a reference rail pressure of a current working cylinder based on a rail pressure sensor disposed at a fixed position; S104: The sum of the reference rail pressure and the rail pressure correction value is used as the injection rail pressure for the next injection of the current working cylinder.

[0025] The currently working cylinder refers to a cylinder that is currently performing an injection action, and the waiting-to-work cylinder refers to a cylinder that has already performed an injection action.

[0026] It should be understood that: injection includes pre-injection, main injection and post-injection, and the injection rail pressure in step S104 includes the pre-injection injection rail pressure, the main injection injection rail pressure and the post-injection injection rail pressure corresponding to the pre-injection, the main injection and the post-injection respectively. Then the rail pressure correction value includes the pre-injection rail pressure correction value, the main injection rail pressure correction value and the post-injection rail pressure correction value.

[0027] In a specific embodiment of the present invention, the fixed position is the top dead center, which refers to the position where the piston moves in the cylinder and the top of the piston reaches the highest point.

[0028] It should be noted that the fixed position may also be other positions besides the top dead center, which will not be described in detail here.

[0029] Compared with the prior art, the injection rail pressure correction method provided by the embodiment of the present invention can obtain the reference rail pressure of the current working cylinder only through the rail pressure sensor set at a fixed position, without the need to design a dynamic interruption to collect the rail pressure, thus avoiding problems such as conflicts in dynamic interruptions, thereby avoiding safety issues caused by uncontrolled injection pulse width, and improving safety during injection. In addition, the difficulty of BSW development is reduced, the project development cycle is shortened, the BSW function is simplified, and its reliability is improved.

[0030] Furthermore, the embodiment of the present invention determines the target cylinder corresponding to the current working cylinder through the correlation between the cylinders in the high-pressure common rail fuel system, and determines the rail pressure correction value of the target cylinder at the last injection, determines the injection rail pressure at the next injection of the current working cylinder based on the rail pressure correction value, and corrects the reference rail pressure based on the rail pressure correction value, thereby improving the accuracy of the injection rail pressure finally determined, and further improving the injection accuracy of the fuel.

[0031] In actual application scenarios, the high-pressure common rail fuel system can be divided into a pumping / injection synchronous system or a pumping / injection asynchronous system according to the pumping and injection cycles; a pumping / injection synchronous system refers to a system in which fuel is injected once for every pumping, and the number of pumping times and injection times are the same, and the rail pressure cycle is constant, while a pumping / injection asynchronous system refers to a system in which the number of pumping times and injection times are different, and the rail pressure cycle fluctuates.

[0032] In order to accurately determine the injection rail pressure of the synchronous pump / injection system and the asynchronous pump / injection system, in some embodiments of the present invention, step S101 is specifically as follows: When the high-pressure common rail fuel system is a pump / injection synchronization system, the target cylinder is the first cylinder; When the high-pressure common rail fuel system is an asynchronous pumping / injection system, the injection characteristics of the high-pressure common rail fuel system are obtained, and the target cylinder is determined based on the correlation of the injection characteristics.

[0033] Since the rail pressure state of each cylinder in the pump / injection synchronous system is consistent, all cylinders can perform injection rail pressure correction based on the rail pressure correction value of the target cylinder. However, the rail pressure state of each cylinder in the pump / injection asynchronous system is not completely consistent. Therefore, the cylinder with a stronger correlation with the current working cylinder is determined from the cylinders to be worked as the target cylinder to ensure the accuracy of the injection rail pressure.

[0034] The embodiment of the present invention respectively sets the target cylinder determination method in the oil pumping / injection synchronous system and the oil pumping / injection asynchronous system to find out the correlation between the cylinders, solves the problem of inconsistent injection amount when the oil injection / pumping is asynchronous, and ensures the accuracy of the determined injection rail pressure.

[0035] It should be noted that the target cylinder refers to a cylinder with the same working similarity as the current working cylinder, that is, the rail pressure correction value of the target cylinder is the same as the rail pressure correction value of the current working cylinder. In other words, the injection rail pressure of the current working cylinder can be corrected based on the rail pressure correction value of the target cylinder.

[0036] In a specific embodiment of the present invention, the injection characteristics include a pumping period, an injection period, an interval angle between two cylinders, and an ignition sequence.

[0037] Based on the above injection characteristics, the specific process of determining the target cylinder is: The lowest common multiple of the pumping cycle and the injection cycle is calculated, and the ratio of the lowest common multiple and the interval angle between the two cylinders is calculated. The target cylinder is determined based on the ratio and the ignition sequence.

[0038] In some embodiments of the present invention, Figure 2 As shown, step S102 includes: S201, obtaining at least one sample rail pressure of the target cylinder during the last injection collected by the rail pressure sensor; S202, determining a rail pressure average of at least one sampled rail pressure; S203 , obtaining a target reference rail pressure of the target cylinder at the time of last injection based on a rail pressure sensor disposed at a fixed position, and taking a difference between the target reference rail pressure and the rail pressure mean as a rail pressure correction value.

[0039] The embodiment of the present invention calculates the rail pressure correction value based on the rail pressure average value of at least one sampled rail pressure, thereby ensuring the accuracy of the rail pressure correction value, and further ensuring the accuracy of the determined injection rail pressure.

[0040] It should be understood that: the more the number of sampled rail pressures is, the more accurate the rail pressure correction value is, but the accuracy requirement for the rail pressure sensor is higher. In a specific embodiment of the present invention, the sampling interval of at least one sampled rail pressure is 0.1 milliseconds.

[0041] In some embodiments of the present invention, step S103 is specifically: The peak rail pressure or average rail pressure of the current working cylinder is obtained based on a rail pressure sensor arranged at a fixed position, and the peak rail pressure or the average rail pressure is used as a reference rail pressure.

[0042] Since the purpose of determining the injection rail pressure is to determine the injection pulse width to achieve control of the injection, in some embodiments of the present invention, after step S104, the following is further included: The injection pulse width is determined based on the injection rail pressure, and the pulse width of the next injection of the current working cylinder is controlled to be the injection pulse width.

[0043] The embodiment of the present invention achieves accurate control of the next injection by determining the injection pulse width based on the injection rail pressure.

[0044] In a specific embodiment of the present invention, a 6-cylinder diesel engine is taken as an example, the pumping cycle and the injection cycle are consistent, both of which are 120 crankshaft angles, and the ignition sequence is 1-5-3-6-2-4. The specific process of the injection pulse width is: 1. When the engine runs to a fixed angle before the top dead center of cylinder 1 (such as a crankshaft angle of 78 degrees), the ECU collects the current actual rail pressure p1_cyl1 (the rail pressure can be the peak or average rail pressure within the crankshaft angle range of 120 degrees); 2. When the engine performs pilot injection of cylinder 1, collect and record the rail pressure sampled at 0.1ms. If there are multiple rail pressures of 0.1ms corresponding to the injection pulse width, take the average value to obtain the rail pressure p_pilot_cyl1; 3. When the engine performs the main injection of cylinder 1, the rail pressure sampled at 0.1ms is collected and recorded. If there are multiple rail pressures of 0.1ms corresponding to the injection pulse width, the average value is taken to obtain the rail pressure p_main_cyl1; 4. When the engine performs post injection of cylinder 1, collect and record the rail pressure sampled at 0.1ms. If there are multiple rail pressures of 0.1ms corresponding to the injection pulse width, take the average value to obtain the rail pressure p_post_cyl1; 5. Calculate the corrected rail pressure for each injection: p_pilot_cor_cyl1 = p1_cyl1-p_pilot_cyl1; p_main_cor_cyl1 = p1_cyl1-p_main_cyl1; p_post_cor_cyl1 = p1_cyl1-ppost_cyl1; 6. When the engine runs to a fixed angle before the top dead center of cylinder 5 (such as a crankshaft angle of 78 degrees), the ECU collects the current actual rail pressure p1_cyl5 (the rail pressure can be the peak or average rail pressure within the crankshaft angle range of 120 degrees); 7. At this time, calculate the injection rail pressure for each injection: a) Pilot injection rail pressure: p_pilot_inj5 = p1_cyl5-p_pilot_cor_cyl1; b) Main injection rail pressure: p_main_inj5 = p1_cyl5-p_main_cor_cyl1; c) Post injection rail pressure: p_post_inj5 = p1_cyl5-p_post_cor_cyl1; 8. Calculate the injection pulse width according to the injection rail pressure of each injection and execute the injection; 9. The same applies to the subsequent cylinders.

[0045] In summary, the injection rail pressure correction method proposed in the embodiment of the present invention improves the accuracy of actual rail pressure collection and calculation, can determine the accurate injection rail pressure, and improves the fuel injection accuracy.

[0046] In order to better implement the injection rail pressure correction method in the embodiment of the present invention, based on the injection rail pressure correction method, the embodiment of the present invention also provides an injection rail pressure correction device, which is applied to a high-pressure common rail fuel system. The high-pressure common rail fuel system includes a current working cylinder and a plurality of cylinders to be worked, such as Figure 3 As shown, the injection rail pressure correction device 300 includes: A target cylinder determining unit 301 is used to determine a target cylinder corresponding to a current working cylinder among a plurality of cylinders to be worked; A rail pressure correction value determination unit 302 is used to determine the rail pressure correction value of the target cylinder at the last injection; A reference rail pressure acquisition unit 303, used to obtain a reference rail pressure of a current working cylinder based on a rail pressure sensor arranged at a fixed position; The injection rail pressure correction unit 304 is used to use the sum of the reference rail pressure and the rail pressure correction value as the injection rail pressure for the next injection of the current working cylinder.

[0047] It should be noted that the injection rail pressure correction device 300 provided in the above embodiment can implement the technical solution described in the above injection rail pressure correction method embodiment. The specific implementation principles or specific implementation details of the above modules or units can refer to the corresponding contents in the above injection rail pressure correction method embodiment, which will not be described one by one here.

[0048] like Figure 4 As shown, the present invention also provides an electronic device 400. The electronic device 400 includes a processor 401, a memory 402 and a display 403. Figure 4 Only some components of the electronic device 400 are shown, but it should be understood that it is not required to implement all of the components shown, and more or fewer components may be implemented instead.

[0049] In some embodiments, the processor 401 may be a central processing unit (CPU), a microprocessor or other data processing chip, and is used to run program codes or process data stored in the memory 402, such as the injection rail pressure correction method of the present invention.

[0050] In some embodiments of the present invention, processor 401 may be a single server or a server group. The server group may be centralized or distributed. In some embodiments, processor 401 may be local or remote. In some embodiments, processor 401 may be implemented in a cloud platform. In one embodiment, the cloud platform may include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an internal cloud, a multi-cloud, etc., or any combination thereof.

[0051] In some embodiments, the memory 402 may be an internal storage unit of the electronic device 400 , such as a hard disk or a memory of the electronic device 400 .

[0052] Furthermore, the memory 402 may include both an internal storage unit of the electronic device 400 and an external storage device. The memory 402 is used to store application software installed in the electronic device 400 and various data.

[0053] In some embodiments, the display 403 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, an OLED (Organic Light-Emitting Diode) touch device, etc. The display 403 is used to display information of the electronic device 400 and to display a visual user interface. The components 401-403 of the electronic device 400 communicate with each other via a system bus.

[0054] In some embodiments of the present invention, when the processor 401 executes the injection rail pressure correction program in the memory 402, the following steps may be implemented: Determine a target cylinder corresponding to the current working cylinder among the multiple cylinders to be worked; Determine the rail pressure correction value at the last injection of the target cylinder; obtaining a reference rail pressure of a current working cylinder based on a rail pressure sensor arranged at a fixed position; The sum of the reference rail pressure and the rail pressure correction value is used as the injection rail pressure for the next injection of the current working cylinder.

[0055] It should be understood that: when the processor 401 executes the injection rail pressure correction program in the memory 402 , in addition to the above functions, other functions may also be implemented, and details may refer to the description of the corresponding method embodiment above.

[0056] Furthermore, the embodiment of the present invention does not specifically limit the type of the electronic device 400 mentioned, and the electronic device 400 may be a portable electronic device such as a mobile phone, a tablet computer, a personal digital assistant (PDA), a wearable device, a laptop computer, etc. Exemplary embodiments of portable electronic devices include but are not limited to portable electronic devices equipped with IOS, Android, Microsoft or other operating systems. The above-mentioned portable electronic devices may also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the present invention, the electronic device 400 may not be a portable electronic device, but a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0057] Accordingly, an embodiment of the present invention further provides a computer-readable storage medium, which is used to store a computer-readable program or instruction. When the program or instruction is executed by a processor, the steps or functions of the injection rail pressure correction method provided by the above method embodiments can be implemented.

[0058] Those skilled in the art will appreciate that all or part of the processes of the above-mentioned embodiments can be implemented by instructing related hardware (such as a processor, a controller, etc.) through a computer program, and the computer program can be stored in a computer-readable storage medium, wherein the computer-readable storage medium is a disk, an optical disk, a read-only storage memory, or a random access memory, etc.

[0059] The above is a detailed introduction to an injection rail pressure correction method, device, electronic device and storage medium provided by the present invention. Specific examples are used herein to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A method for correcting injection rail pressure, characterized in that: Applied to a high-pressure common rail fuel system, the high-pressure common rail fuel system includes a current working cylinder and a plurality of cylinders to be worked; the method includes: Determine a target cylinder corresponding to the current working cylinder among the plurality of cylinders to be worked; Determining a rail pressure correction value of the target cylinder at the last injection; obtaining a reference rail pressure of the current working cylinder based on a rail pressure sensor disposed at the fixed position; The sum of the reference rail pressure and the rail pressure correction value is used as the injection rail pressure during the next injection of the current working cylinder.

2. The injection rail pressure correction method according to claim 1, characterized in that: The high-pressure common rail fuel system is a synchronous pump / injection system or an asynchronous pump / injection system; the step of determining a target cylinder among the plurality of cylinders to be worked that has the same operating characteristic as the current working cylinder includes: When the high-pressure common rail fuel system is a pump / injection synchronization system, the target cylinder is the first cylinder; When the high-pressure common rail fuel system is an asynchronous pumping / injection system, the injection characteristics of the high-pressure common rail fuel system are obtained, and the target cylinder is determined based on the correlation of the injection characteristics.

3. The injection rail pressure correction method according to claim 2, characterized in that: The injection characteristics include a pumping period, an injection period, an interval angle between two cylinders, and an ignition sequence.

4. The injection rail pressure correction method according to claim 1, characterized in that: The determining of the rail pressure correction value of the target cylinder at the last injection comprises: Acquire at least one sample rail pressure collected by a rail pressure sensor during the last injection of the target cylinder; determining a rail pressure average of the at least one sampled rail pressure; A target reference rail pressure at the last injection of the target cylinder is acquired based on the rail pressure sensor disposed at the fixed position, and a difference between the target reference rail pressure and the rail pressure average is used as the rail pressure correction value.

5. The injection rail pressure correction method according to claim 1, characterized in that: The sampling interval of the at least one sampled rail pressure is 0.1 millisecond.

6. The injection rail pressure correction method according to claim 1, characterized in that: The obtaining the reference rail pressure of the current working cylinder based on the rail pressure sensor arranged at the fixed position includes: A peak rail pressure or an average rail pressure of the current working cylinder is obtained based on a rail pressure sensor arranged at the fixed position, and the peak rail pressure or the average rail pressure is used as the reference rail pressure.

7. The injection rail pressure correction method according to claim 1, characterized in that: The method further comprises: An injection pulse width is determined based on the injection rail pressure, and a pulse width of the next injection of the current working cylinder is controlled to be the injection pulse width.

8. An injection rail pressure correction device, characterized in that: Applied to a high-pressure common rail fuel system, the high-pressure common rail fuel system includes a current working cylinder and a plurality of cylinders to be worked; the device includes: a target cylinder determining unit, configured to determine a target cylinder corresponding to the current working cylinder among the plurality of cylinders to be worked; a rail pressure correction value determination unit, used to determine the rail pressure correction value of the target cylinder at the last injection; a reference rail pressure obtaining unit, configured to obtain the reference rail pressure of the current working cylinder based on a rail pressure sensor disposed at the fixed position; The injection rail pressure correction unit is used to use the sum of the reference rail pressure and the rail pressure correction value as the injection rail pressure for the next injection of the current working cylinder.

9. An electronic device, characterized in that: comprising a memory and a processor, wherein: The memory is used to store programs; The processor is coupled to the memory and is used to execute the program stored in the memory to implement the steps of the injection rail pressure correction method according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a program or an instruction, and when the program or the instruction is executed by the processor, the steps in the injection rail pressure correction method according to any one of claims 1 to 7 are implemented.

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