Oil pressure control method, device, medium and equipment for direct injection engine

Abstract

The present disclosure relates to an oil pressure control method, device, medium and equipment for a direct injection engine. The method comprises: obtaining a target injection amount of an injector when a vehicle is running; determining an injector driving time corresponding to the target injection amount and a predetermined minimum injection pressure value; determining a target driving time according to the determined injector driving time; determining a target injection pressure value of the injector according to the target driving time and the target injection amount; and controlling the injector to inject oil according to the target injection pressure value. In this way, the target injection pressure value of the injector can be determined flexibly and reasonably in real time, so that the target injection pressure value is small, thereby increasing the injector driving time. Since the injection time is increased, more active multiple injections are achieved, and particulate matter emissions when the engine is running are reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle automatic control, and in particular, to an oil pressure control method, device, medium and equipment for a direct injection engine. Background Art

[0002] At present, the control strategies for reducing particulate matter emissions from direct injection engines include high-pressure injection, multiple injection, variable injection phase, etc. Among them, the multiple injection strategy makes the injected gasoline atomization effect better, the oil and gas mixing is more complete, and the particulate matter emission control is better. Especially when the engine is in a cold state, multiple injection can reduce particulate matter emissions more effectively than high-pressure injection.

[0003] The target injection pressure value of existing direct injection engines is a fixed value calibrated through a test bench based on optimal fuel economy or maximum torque sweep points. The calibrated target injection pressure value is not necessarily the optimal point for particulate matter emissions and may result in larger emissions. Summary of the invention

[0004] The purpose of the present disclosure is to provide an oil pressure control method, device, medium and equipment for a direct injection engine, which can effectively reduce the emission of particulate matter by controlling multiple injections.

[0005] In order to achieve the above object, the present disclosure provides an oil pressure control method for a direct injection engine, the method comprising:

[0006] When the vehicle is running, the target injection amount of the injector is obtained;

[0007] determining an injector driving time corresponding to both the target injection amount and a predetermined minimum injection pressure value;

[0008] determining a target driving time according to the determined injector driving time;

[0009] Determining a target injection pressure value of the injector according to the target driving time and the target injection amount;

[0010] The fuel injector is controlled to inject fuel according to the target fuel injection pressure value.

[0011] Optionally, the determining of the injector driving time corresponding to both the target injection amount and a predetermined minimum injection pressure value comprises:

[0012] The injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value is determined according to the following formula:

[0013] Tmax=A0*Q1+B

[0014] Among them, Tmax is the injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value, Q1 is the target injection amount, A0 is the first coefficient corresponding to the predetermined minimum injection pressure value, wherein there is a predetermined corresponding relationship between the injection pressure value and the first coefficient, and B is a predetermined second coefficient.

[0015] Optionally, determining the target driving time according to the determined injector driving time includes:

[0016] If Tmax>M*T0, the target driving time is determined to be M*T0, wherein M is a predetermined positive integer and T0 is the shortest response time of the injector;

[0017] If N*T0>Tmax>(N-1)*T0, the target driving time is determined to be (N-1)*T0, wherein N is a positive integer and N<M.

[0018] Optionally, the method further comprises:

[0019] If T0 ≥ Tmax, the target injection pressure value of the injector is determined to be a preset minimum injection pressure value.

[0020] Optionally, determining the target injection pressure value of the injector according to the target driving time and the target injection amount includes:

[0021] Determine a first coefficient corresponding to the target fuel injection pressure value according to T1=A1*Q1+B, wherein T1 is the target driving time, Q1 is the target fuel injection amount, A1 is the first coefficient corresponding to the target fuel injection pressure value, wherein the fuel injection pressure value and the first coefficient have a predetermined corresponding relationship, and B is a predetermined second coefficient;

[0022] The injection pressure value corresponding to A1 is found in the corresponding relationship between the injection pressure value and the first coefficient and is used as the target injection pressure value.

[0023] The present disclosure also provides an oil pressure control device for a direct injection engine, the device comprising:

[0024] An acquisition module, used for acquiring a target fuel injection amount of the fuel injector when the vehicle is running;

[0025] A first determination module is used to determine the injector driving time corresponding to the target injection amount and a predetermined minimum injection pressure value;

[0026] a second determination module, configured to determine a target driving time according to the determined injector driving time;

[0027] A third determination module, configured to determine a target injection pressure value of the injector according to the target driving time and the target injection amount;

[0028] The control module is used to control the injector to inject fuel according to the target injection pressure value.

[0029] Optionally, the first determining module is used to:

[0030] The injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value is determined according to the following formula:

[0031] Tmax=A0*Q1+B

[0032] Among them, Tmax is the injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value, Q1 is the target injection amount, A0 is the first coefficient corresponding to the predetermined minimum injection pressure value, wherein there is a predetermined corresponding relationship between the injection pressure value and the first coefficient, and B is a predetermined second coefficient.

[0033] Optionally, the second determining module is used to:

[0034] If Tmax>M*T0, the target driving time is determined to be M*T0, wherein M is a predetermined positive integer and T0 is the shortest response time of the injector;

[0035] If N*T0>Tmax>(N-1)*T0, the target driving time is determined to be (N-1)*T0, wherein N is a positive integer and N<M.

[0036] The present disclosure also provides a non-temporary computer-readable storage medium having a computer program stored thereon, which implements the steps of the above method provided by the present disclosure when the program is executed by a processor.

[0037] The present disclosure also provides an electronic device, comprising:

[0038] a memory having a computer program stored thereon;

[0039] A processor is used to execute the computer program in the memory to implement the steps of the above method provided by the present disclosure.

[0040] Through the above technical solution, the injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value is determined; the target driving time is determined according to the determined injector driving time; and the target injection pressure value of the injector is determined according to the target driving time. In this way, the target injection pressure value of the injector can be flexibly and reasonably determined in real time, so that the target injection pressure value is small, thereby increasing the injector driving time. Since the injection time is increased, more active multiple injections are achieved, reducing particulate matter emissions when the engine is running.

[0041] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0043] Figure 1 is a flow chart of an oil pressure control method for a direct injection engine provided by an exemplary embodiment;

[0044] Figure 2 is a block diagram of an oil pressure control device for a direct injection engine provided by an exemplary embodiment;

[0045] Figure 3 It is a block diagram of an electronic device shown in an exemplary embodiment. DETAILED DESCRIPTION

[0046] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0047] The operation of the injector has the characteristic of the shortest response time, that is, if the injector driving time is less than the shortest response time, the injector cannot be turned on. Moreover, if the injection amount is the same, the injection pressure increases, and the injector driving time will be shortened accordingly. In this way, the shortest response time characteristic of the injector will cause the original working condition that can achieve multiple injections to become a single injection. For example, under a certain injection pressure value, the injector driving time is 2t, and the injector can achieve two injections at this time. If the injection pressure value increases, the injector driving time will be less than 2t, and the injector can only achieve a single injection in this case. Since the multiple injection strategy makes the injected gasoline atomization effect better, the oil and gas mixing is more complete, and the particulate matter emission control is better, therefore, the inventor thought of calculating the corresponding target injection pressure value according to different injection amounts, the purpose is to increase the injection time, achieve more active multiple injections, and make full use of multiple injections before using high-pressure injection.

[0048] Figure 1 FIG. 1 is a flow chart of an oil pressure control method for a direct injection engine provided by an exemplary embodiment. Figure 1 As shown, the method may include the following steps:

[0049] Step S11, when the vehicle is running, obtaining the target injection amount of the injector. In the related art, the target injection amount of the injector can be calculated according to the working condition of the engine.

[0050] Step S12, determining the injector drive time corresponding to the target injection amount and the predetermined minimum injection pressure value. The minimum injection pressure value is the minimum value of the pressure required for the system composed of the engine and the injector to inject, which can be provided by the supplier and is a fixed value. As mentioned above, the injection pressure value and the injector drive time have an inverse correlation, that is, the smaller the injection pressure value (needs to be greater than the predetermined minimum injection pressure value), the longer the injector drive time. Therefore, when the target injection amount is determined and unchanged, the predetermined minimum injection pressure value corresponds to the maximum value of the injector drive time.

[0051] Step S13, determining the target drive time according to the determined injector drive time. The injector drive time determined according to the above step S12 is the maximum value of the drive time that can be achieved. On the basis of the determined injector drive time, it can be slightly adjusted in terms of rationality and operability to obtain the target drive time. The target drive time is the time when the injector is expected to actually spray. The target drive time is closer to the maximum value of the drive time that can be achieved, so that the number of injections is large.

[0052] Step S14, determining the target injection pressure value of the injector according to the target driving time and the target injection amount. In order to achieve the target driving time, an appropriate injection pressure value can be used to complete the determined target injection amount, and the appropriate injection pressure value is used as the target injection pressure value.

[0053] Step S15, controlling the fuel injector to inject fuel according to the target fuel injection pressure value.

[0054] Through the above technical solution, the injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value is determined; the target driving time is determined according to the determined injector driving time; and the target injection pressure value of the injector is determined according to the target driving time. In this way, the target injection pressure value of the injector can be flexibly and reasonably determined in real time, so that the target injection pressure value is small, thereby increasing the injector driving time. Since the injection time is increased, more active multiple injections are achieved, reducing particulate matter emissions when the engine is running.

[0055] In another embodiment, the step S12 of determining the injector driving time corresponding to both the target injection amount and the predetermined minimum injection pressure value may include:

[0056] The injector actuation time corresponding to the target injection amount and the predetermined minimum injection pressure value is determined according to the following formula:

[0057] Tmax=A0*Q1+B (1)

[0058] Among them, Tmax is the injector driving time corresponding to both the target injection amount and the predetermined minimum injection pressure value, Q1 is the target injection amount, A0 is the first coefficient corresponding to the predetermined minimum injection pressure value, and B is the predetermined second coefficient.

[0059] There is a predetermined corresponding relationship between the injection pressure value and the first coefficient, which can be obtained in advance by experiment. A0 is the first coefficient corresponding to the predetermined minimum injection pressure value found from the corresponding relationship.

[0060] In this embodiment, the corresponding relationship between the injector driving time and the injection amount is applied:

[0061] T=A*Q+B (2)

[0062] Wherein, T is the injector driving time, Q is the injection amount, A is the first coefficient corresponding to the injection pressure value, and the unit can be seconds / gram. B is the predetermined second coefficient, and the unit can be seconds. That is, through experiments, the corresponding arrays of the injector driving time T, the injection amount Q and the injection pressure value C are obtained, and T and Q when B and C are equal are substituted into formula (2) for fitting to obtain the corresponding first coefficient A and second coefficient B. The first coefficient A is the first coefficient corresponding to the C. By analogy, the A corresponding to different Cs is obtained, that is, the predetermined corresponding relationship between the injection pressure value and the first coefficient is obtained.

[0063] Then, returning to the embodiment of formula (1), the known injection amount is the target injection amount Q1, the predetermined minimum injection pressure value is known, and the first coefficient A0 corresponding to the predetermined minimum injection pressure value is obtained according to the corresponding relationship, and the second coefficient B is known. According to formula (1), the injector drive time Tmax corresponding to the target injection amount Q1 and the predetermined minimum injection pressure value is calculated, and this Tmax is the maximum drive time (i.e., injection time) that can theoretically achieve the target injection amount Q1, because it corresponds to the minimum injection pressure value.

[0064] In yet another embodiment, the step S13 of determining the target driving time according to the determined injector driving time may include:

[0065] If Tmax>M*T0, the target driving time is determined to be M*T0, where M is a predetermined positive integer and T0 is the shortest response time of the injector;

[0066] If N*T0>Tmax>(N-1)*T0, the target driving time is determined to be (N-1)*T0, where N is a positive integer and N<M.

[0067] Wherein, M is the maximum number of injections that can be achieved, which depends on the driving capabilities of the injector and the engine control unit and can be predetermined as a fixed value. T0 is a fixed value.

[0068] In this embodiment, if the injector drive time determined in step S12 is not an integer multiple of T0, the injector drive time determined is rounded according to T0, and then the target injection pressure value is calculated according to the rounded injector drive time (target drive time) and the target injection amount, and the particulate matter emission is reduced by high-pressure injection. If the injector drive time determined in step S12 is exactly an integer multiple of T0 (less than or equal to M), the injector drive time determined in step S12 is directly used as the target drive time. In this way, the injector drive time can be maximized, thereby greatly reducing particulate matter emissions.

[0069] In yet another embodiment, the method may further include: if T0 ≥ Tmax, determining the target injection pressure value of the injector to be a preset minimum injection pressure value.

[0070] That is, if the injector driving time determined in step S12 is less than the shortest response time of the injector, the target injection pressure value can be directly determined as T0, and the target driving time is no longer determined, so that the injection can be ensured.

[0071] In another embodiment, the step S14 of determining the target injection pressure value of the injector according to the target driving time and the target injection amount may include:

[0072] The first coefficient corresponding to the target injection pressure value is determined according to T1=A1*Q1+B. Wherein, T1 is the target driving time, Q1 is the target injection amount, and A1 is the first coefficient corresponding to the target injection pressure value. Wherein, there is a predetermined corresponding relationship between the injection pressure value and the first coefficient, and B is a predetermined second coefficient;

[0073] The injection pressure value corresponding to A1 is found in the corresponding relationship between the injection pressure value and the first coefficient and is used as the target injection pressure value.

[0074] That is, step S14 also uses the above formula (2) to calculate the target injection pressure value of the injector. Given the target driving time T1, the target injection amount Q1, and the predetermined second coefficient B, the first coefficient A1 corresponding to the target injection pressure value Q1 is calculated according to formula (2), and then the injection pressure value corresponding to A1 is found in the predetermined corresponding relationship as the target injection pressure value.

[0075] In the present disclosure, by constructing formula (2) and the above-mentioned corresponding relationship, a suitable target injection pressure value is calculated in real time, so that the injector driving time is maximized, thereby actively promoting multiple injections and greatly reducing particulate matter emissions.

[0076] Figure 2 FIG. 1 is a block diagram of an oil pressure control device for a direct injection engine provided by an exemplary embodiment. Figure 2 As shown, the oil pressure control device 200 for a direct injection engine may include an acquisition module 201 , a first determination module 202 , a second determination module 203 , a third determination module 204 and a control module 205 .

[0077] The acquisition module 201 is used to acquire the target fuel injection amount of the injector when the vehicle is running.

[0078] The first determination module 202 is configured to determine an injector driving time corresponding to both a target injection amount and a predetermined minimum injection pressure value.

[0079] The second determining module 203 is used to determine the target driving time according to the determined injector driving time.

[0080] The third determination module 204 is used to determine a target injection pressure value of the injector according to the target driving time and the target injection amount.

[0081] The control module 205 is used to control the injector to inject fuel according to the target injection pressure value.

[0082] Optionally, the first determining module 202 is used to:

[0083] The injector actuation time corresponding to the target injection amount and the predetermined minimum injection pressure value is determined according to the following formula:

[0084] Tmax=A0*Q1+B

[0085] Among them, Tmax is the injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value, Q1 is the target injection amount, A0 is the first coefficient corresponding to the predetermined minimum injection pressure value, wherein there is a predetermined corresponding relationship between the injection pressure value and the first coefficient, and B is the predetermined second coefficient.

[0086] Optionally, the second determining module 203 is used to:

[0087] If Tmax>M*T0, the target driving time is determined to be M*T0, where M is a predetermined positive integer and T0 is the shortest response time of the injector;

[0088] If N*T0>Tmax>(N-1)*T0, the target driving time is determined to be (N-1)*T0, where N is a positive integer and N<M.

[0089] Optionally, the oil pressure control device 200 for a direct injection engine may further include a fourth determination module.

[0090] The fourth determination module is used for determining the target injection pressure value of the injector to be a preset minimum injection pressure value if T0≥Tmax.

[0091] Optionally, the third determining module 204 is used to:

[0092] Determine a first coefficient corresponding to the target injection pressure value according to T1=A1*Q1+B, wherein T1 is the target driving time, Q1 is the target injection amount, A1 is the first coefficient corresponding to the target injection pressure value, wherein the injection pressure value and the first coefficient have a predetermined corresponding relationship, and B is a predetermined second coefficient;

[0093] The injection pressure value corresponding to A1 is found in the corresponding relationship between the injection pressure value and the first coefficient and is used as the target injection pressure value.

[0094] Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0095] Through the above technical solution, the injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value is determined; the target driving time is determined according to the determined injector driving time; and the target injection pressure value of the injector is determined according to the target driving time. In this way, the target injection pressure value of the injector can be flexibly and reasonably determined in real time, so that the target injection pressure value is small, thereby increasing the injector driving time. Since the injection time is increased, more active multiple injections are achieved, reducing particulate matter emissions when the engine is running.

[0096] The present disclosure also provides an electronic device, including a memory and a processor.

[0097] A computer program is stored in the memory; the processor is used to execute the computer program in the memory to implement the steps of the above method provided by the present disclosure.

[0098] Figure 3FIG. 1 is a block diagram of an electronic device 300 shown in an exemplary embodiment. Figure 3 As shown, the electronic device 300 may include: a processor 301 , a memory 302 . The electronic device 300 may also include one or more of a multimedia component 303 , an input / output (I / O) interface 304 , and a communication component 305 .

[0099] The processor 301 is used to control the overall operation of the electronic device 300 to complete all or part of the steps in the above-mentioned oil pressure control method for a direct injection engine. The memory 302 is used to store various types of data to support the operation of the electronic device 300, and these data may include, for example, instructions for any application or method used to operate on the electronic device 300, and application-related data, such as contact data, sent and received messages, pictures, audio, video, etc. The memory 302 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (Static Random Access Memory, referred to as SRAM), electrically erasable programmable read-only memory (Electrically Erasable Programmable Read-Only Memory, referred to as EEPROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, referred to as EPROM), programmable read-only memory (Programmable Read-Only Memory, referred to as PROM), read-only memory (Read-Only Memory, referred to as ROM), magnetic memory, flash memory, magnetic disk or optical disk. The multimedia component 303 may include a screen and an audio component. The screen may be, for example, a touch screen, and the audio component is used to output and / or input audio signals. For example, the audio component may include a microphone for receiving external audio signals. The received audio signal may be further stored in the memory 302 or sent through the communication component 305. The audio component also includes at least one speaker for outputting audio signals. The I / O interface 304 provides an interface between the processor 301 and other interface modules, and the other interface modules may be keyboards, mice, buttons, etc. These buttons may be virtual buttons or physical buttons. The communication component 305 is used for wired or wireless communication between the electronic device 300 and other devices. Wireless communication, such as Wi-Fi, Bluetooth, Near Field Communication (NFC), 2G, 3G, 4G, NB-IOT, eMTC, or other 5G, etc., or a combination of one or more of them, is not limited here. Therefore, the corresponding communication component 305 may include: Wi-Fi module, Bluetooth module, NFC module, etc.

[0100] In an exemplary embodiment, the electronic device 300 can be implemented by one or more application specific integrated circuits (ASIC), digital signal processors (DSP), digital signal processing devices (DSPD), programmable logic devices (PLD), field programmable gate arrays (FPGA), controllers, microcontrollers, microprocessors or other electronic components to execute the above-mentioned oil pressure control method for direct injection engines.

[0101] In another exemplary embodiment, a non-transitory computer-readable storage medium including program instructions is also provided, and when the program instructions are executed by a processor, the steps of the oil pressure control method for a direct injection engine are implemented. For example, the computer-readable storage medium can be the memory 302 including the program instructions, and the program instructions can be executed by the processor 301 of the electronic device 300 to complete the oil pressure control method for a direct injection engine.

[0102] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0103] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0104] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A method for controlling oil pressure of a direct injection engine, characterized in that: The method comprises: When the vehicle is running, the target injection amount of the injector is obtained; determining an injector driving time corresponding to both the target injection amount and a predetermined minimum injection pressure value; determining a target driving time according to the determined injector driving time; Determining a target injection pressure value of the injector according to the target driving time and the target injection amount; Controlling the fuel injector to inject fuel according to the target fuel injection pressure value, thereby facilitating multiple injections; Wherein, determining the target driving time according to the determined injector driving time comprises: If Tmax>M*T0, the target driving time is determined to be M*T0, wherein M is the maximum number of injections that can be achieved, T0 is the shortest response time of the injector, and Tmax is the injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value; If N*T0>Tmax>(N-1)*T0, the target driving time is determined to be (N-1)*T0, where N is a positive integer and N<M; Wherein, determining the target injection pressure value of the injector according to the target driving time and the target injection amount includes: Determine a first coefficient corresponding to the target fuel injection pressure value according to T1=A1*Q1+B, wherein T1 is the target driving time, Q1 is the target fuel injection amount, A1 is the first coefficient corresponding to the target fuel injection pressure value, wherein the fuel injection pressure value and the first coefficient have a predetermined corresponding relationship, and B is a predetermined second coefficient; The injection pressure value corresponding to A1 is found in the corresponding relationship between the injection pressure value and the first coefficient and is used as the target injection pressure value.

2. The method according to claim 1, characterized in that The step of determining the injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value comprises: The injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value is determined according to the following formula: Tmax=A0*Q1+B Among them, Q1 is the target injection amount, A0 is a first coefficient corresponding to the predetermined minimum injection pressure value, wherein there is a predetermined corresponding relationship between the injection pressure value and the first coefficient, and B is a predetermined second coefficient.

3. The method according to claim 1, characterized in that The method further comprises: If T0≥Tmax, the target injection pressure value of the injector is determined to be a preset minimum injection pressure value, and the target injection time is determined to be T0 to ensure that the injection is achieved.

4. An oil pressure control device for a direct injection engine, characterized in that: The device comprises: An acquisition module, used for acquiring a target fuel injection amount of the fuel injector when the vehicle is running; A first determination module, configured to determine an injector driving time corresponding to the target injection amount and a predetermined minimum injection pressure value; a second determination module, configured to determine a target driving time according to the determined injector driving time; A third determination module, configured to determine a target injection pressure value of the injector according to the target driving time and the target injection amount; a control module, used for controlling the injector to inject fuel according to the target injection pressure value, thereby facilitating multiple injections; Wherein, the second determining module is used for: If Tmax>M*T0, the target driving time is determined to be M*T0, wherein M is the maximum number of injections that can be achieved, T0 is the shortest response time of the injector, and Tmax is the injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value; If N*T0>Tmax>(N-1)*T0, the target driving time is determined to be (N-1)*T0, where N is a positive integer and N<M; Wherein, the third determination module is used for: Determine a first coefficient corresponding to the target fuel injection pressure value according to T1=A1*Q1+B, wherein T1 is the target driving time, Q1 is the target fuel injection amount, A1 is the first coefficient corresponding to the target fuel injection pressure value, wherein the fuel injection pressure value and the first coefficient have a predetermined corresponding relationship, and B is a predetermined second coefficient; The injection pressure value corresponding to A1 is found in the corresponding relationship between the injection pressure value and the first coefficient and is used as the target injection pressure value.

5. The device according to claim 4, characterized in that The first determining module is used for: The injector driving time corresponding to the target injection amount and the predetermined minimum injection pressure value is determined according to the following formula: Tmax=A0*Q1+B Among them, Q1 is the target injection amount, A0 is a first coefficient corresponding to the predetermined minimum injection pressure value, wherein there is a predetermined corresponding relationship between the injection pressure value and the first coefficient, and B is a predetermined second coefficient.

6. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 3 are implemented.

7. An electronic device, characterized in that: include: a memory having a computer program stored thereon; A processor, configured to execute the computer program in the memory to implement the steps of the method according to any one of claims 1 to 3.

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