Engine control method, system, device, medium and vehicle

Abstract

This application discloses an engine control method, system, device, medium, and vehicle. The method obtains the vehicle's battery charge and engine water temperature; selects an engine control strategy based on the vehicle's battery charge and engine water temperature, the engine control strategy being used to instruct segmented adjustment of engine speed and rail pressure based on the vehicle's battery charge; and controls the engine starting speed and rail pressure based on the engine control strategy. By obtaining different remaining battery levels, the vehicle's battery charge is segmented, and the engine starting speed and rail pressure are adjusted based on the different segmented power levels, achieving differentiated control under different battery levels. In this way, the engine speed and rail pressure can be adjusted according to different situations, resolving the issue of loud oil pump knocking noise.

Description

Technical Field

[0001] The present application relates to the field of automotive technology, and in particular to an engine control method, system, device, medium and vehicle. Background Art

[0002] Current direct-injection gasoline engine high-pressure fuel pumps are typically single-plunger pumps. The engine-driven cam and stopper drive the pump plunger, thereby supplying fuel to the fuel rail. A relief valve is built into the pump to precisely control fuel flow. The movement of the plunger increases fuel pressure. When the fuel pressure exceeds the pressure within the rail, fuel enters the high-pressure fuel rail through the pump outlet and high-pressure fuel line.

[0003] During cold idle charging in some existing hybrid vehicles, the engine maintains a high idle speed, and the high-pressure fuel pump operates at a continuously high rail pressure. During this period, the high-pressure fuel pump's impact energy against the relief valve cover seat is high, producing a knocking sound similar to a "tapping" noise. This unusual noise is easily noticeable during vehicle parking and charging, affecting engine sound quality and impairing the user experience.

[0004] Therefore, how to optimize the defect of high noise during engine startup is a technical problem that technicians in this field urgently need to solve. Summary of the Invention

[0005] Based on the above problems, the present application provides an engine control method, system, device, medium and vehicle, which aims to optimize the defect of high noise during engine starting by adjusting the engine starting idle speed and rail pressure value.

[0006] To solve the above problems, the technical solutions provided in the embodiments of the present application are as follows:

[0007] A first aspect of the present application provides an engine control method, comprising:

[0008] Get vehicle power and engine water temperature;

[0009] Selecting an engine control strategy according to the vehicle power and the engine water temperature, the engine control strategy being used to instruct segmented adjustment of the engine speed and rail pressure according to the vehicle power;

[0010] The engine starting speed and rail pressure value are controlled according to the engine control strategy.

[0011] Optionally, selecting an engine control strategy according to the vehicle power and the engine water temperature includes:

[0012] When the vehicle power is not greater than a preset threshold and the water temperature is greater than a preset water temperature, the selected engine control strategy at least includes: the engine starting speed is a first speed value, and the rail pressure value is a first rail pressure value.

[0013] Optionally, selecting an engine control strategy according to the vehicle power and the engine water temperature includes:

[0014] When the water temperature is not greater than the preset water temperature and the vehicle power level meets the first power range, the selected engine control strategy at least includes: the engine starting speed is a second speed value, and the rail pressure value is a second rail pressure value.

[0015] Optionally, selecting an engine control strategy according to the vehicle power and the engine water temperature includes:

[0016] When the water temperature is not greater than the preset water temperature and the vehicle power level is within the second power range, the selected engine control strategy at least includes: the engine starting speed is a third speed value, and the rail pressure value is a third rail pressure value.

[0017] Optionally, selecting an engine control strategy according to the vehicle power and the engine water temperature includes:

[0018] When the water temperature is not greater than the preset water temperature and the vehicle power level meets the third power range, the selected engine control strategy at least includes: the engine starting speed is a fourth speed value, and the rail pressure value is a fourth rail pressure value.

[0019] In a second aspect, an embodiment of the present application provides a system, including:

[0020] An acquisition unit, used to obtain vehicle power and engine water temperature;

[0021] a strategy selection unit, configured to select an engine control strategy based on the vehicle power level and the engine water temperature, wherein the engine control strategy is configured to indicate segmented adjustment of the engine speed and rail pressure based on the vehicle power level;

[0022] The control unit is used to control the engine starting speed and rail pressure value according to the engine control strategy.

[0023] Optionally, the strategy selection unit is specifically used to select the engine control strategy when the vehicle power is not greater than a preset threshold and the water temperature is greater than a preset water temperature, at least including: the engine starting speed is a first speed value, and the rail pressure value is a first rail pressure value.

[0024] In a third aspect, an embodiment of the present application provides a device comprising a memory and a processor, wherein the memory is used to store instructions or codes, and the processor is used to execute the instructions or codes so that the device executes the engine control method described in any one of the first aspects above.

[0025] In a fourth aspect, an embodiment of the present application provides a computer storage medium, in which a code is stored. When the code is executed, a device executing the code implements the engine control method described in any one of the first aspects above.

[0026] In a fifth aspect, an embodiment of the present application provides a vehicle, wherein the vehicle includes a central electronic control module, and the central electronic control module is configured to execute the engine control method described in any one of the first aspects.

[0027] Compared with the existing technology, this application has the following beneficial effects:

[0028] The engine control method, system, device, medium, and vehicle provided herein obtain vehicle power and engine water temperature; select an engine control strategy based on the vehicle power and engine water temperature, the engine control strategy indicating segmented adjustment of engine speed and rail pressure based on the vehicle power; and control the engine starting speed and rail pressure based on the engine control strategy. By obtaining different remaining power levels, the vehicle power level is segmented, and the engine starting speed and rail pressure are adjusted based on the power levels of the different segments, achieving differentiated control under different power levels. In this way, the problem of loud oil pump knocking noise is resolved by adjusting the engine speed and rail pressure according to different situations. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in this embodiment or the prior art, the following briefly introduces the drawings required for use in the embodiment or the prior art description. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A flow chart of an engine control method provided in an embodiment of the present application;

[0031] Figure 2 This is a structural diagram of an engine control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to help those skilled in the art better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 this application.

[0033] As mentioned above, in the cold idle charging conditions of some existing hybrid models, the engine maintains a high idle speed and the high-pressure oil pump is continuously in a high rail pressure state when working. At this time, during the oil pumping process, the impact energy of the overflow valve cover seat is large, resulting in a knocking sound, similar to an abnormal sound of "da da". When the vehicle is parked and charging, this abnormal sound is easily perceived, affecting the engine sound quality, the user experience of the vehicle user is poor, or even causing user complaints.

[0034] In view of this, under normal circumstances, when the cold engine is started, the engine will increase the idle speed to increase the engine torque output, and the rail pressure will increase at the same time; in order to solve the problem of "clicking" sound caused by the high rail pressure of the cold engine idle charging, a rail pressure adjustment strategy is formulated. The engine control method provided by the embodiment of the present application obtains the vehicle power and engine water temperature; according to the vehicle power and the engine water temperature, the engine control strategy is selected, and the engine control strategy is used to indicate the adjustment of the engine speed and rail pressure in sections according to the vehicle power; the engine starting speed and rail pressure value are controlled according to the engine control strategy. By obtaining different remaining power conditions, the vehicle power is segmented, and the engine starting speed and rail pressure value are adjusted according to the power of different sections, so as to achieve differentiated control under different power conditions. In this way, the problem of loud oil pump knocking sound is solved according to the engine speed and rail pressure adjustment in different situations.

[0035] The methods provided in the embodiments of this application can be executed by an ECU (Electronic Control Unit), also known as a "vehicle computer." The ECU consists of a microcontroller (MCU), memory (ROM, RAM), input / output (I / O) interfaces, an analog-to-digital converter (A / D), and large-scale integrated circuits such as shapers and drivers. The ECU obtains the current remaining battery capacity (SOC) value of the vehicle battery and determines different remaining battery levels.

[0036] The following describes an engine control method provided by this application through an embodiment. Figure 1 , Figure 1 This is a flow chart of an engine control method provided in an embodiment of the present application. The control method provided in this embodiment can be executed by an engine control system, including:

[0037] S101. Obtain vehicle power and engine water temperature.

[0038] The vehicle power level is the current remaining power SOC value of the vehicle battery. When it is detected that the vehicle power level is not greater than a preset threshold, it means that the current vehicle SOC value is low and the engine needs to be started for charging.

[0039] The engine water temperature may be detected in real time by a temperature sensor installed inside the vehicle.

[0040] S102: Select an engine control strategy according to the vehicle power level and the engine water temperature.

[0041] The engine control strategy is used to instruct the engine speed and rail pressure to be adjusted in stages according to the vehicle power level.

[0042] S103 : Control the engine starting speed and rail pressure value according to the engine control strategy.

[0043] In some possible implementations, the implementation of selecting the engine control strategy according to the vehicle power and the engine water temperature includes four methods: AD:

[0044] A: When the vehicle power is not greater than a preset threshold and the water temperature is greater than a preset water temperature, the selected engine control strategy at least includes: the engine starting speed is a first speed value, and the rail pressure value is a first rail pressure value.

[0045] Engine starting speed includes the engine idle starting speed. Idle speed is a vehicle operating condition where the engine is operating in neutral. This means the engine is operating without load, simply overcoming the frictional resistance of its internal components without outputting power. The engine speed at idle speed is called idle speed. Idle speed can be adjusted by adjusting the air damper, for example. Idle speed means the engine is "exerting power but not producing any results."

[0046] As described in S101, when it is detected that the vehicle's charge level is not greater than a preset threshold, it means that the current vehicle SOC value is low and the engine needs to be started for charging. The current engine water temperature is obtained. When the water temperature is greater than the preset water temperature, the engine is started at a first speed value and a first rail pressure value. That is, when SOC ≤ X% and the engine water temperature T is greater than the preset water temperature, the engine starting speed is determined to be the first speed value and the rail pressure value is the first rail pressure value, wherein the first speed value is a calibrated value determined based on the vehicle's charge level and the water temperature, and the first rail pressure value is a calibrated value determined based on the first speed value. The values ​​of the calibration values ​​can be adjusted according to the actual vehicle conditions and are not limited here.

[0047] That is, if the vehicle's engine is currently charging and the water temperature is greater than the preset temperature, the engine idle speed is controlled to the calibrated speed value at normal temperature, and the rail pressure is the calibrated rail pressure value at normal temperature idle speed. In this case, the vehicle engine is in the normal starting process, and there will be no knocking noise during driving, or the frequency and sound of abnormal noise are so low that they can be almost ignored. The idle speed can be adjusted by adjusting the throttle opening and the idle fuel supply.

[0048] B: When the water temperature is not greater than the preset water temperature and the vehicle power level is within the first power range, the selected engine control strategy at least includes: the engine starting speed is the second speed value, and the rail pressure value is the second rail pressure value.

[0049] For example, the preset water temperature can be set to 10 degrees, and the first power interval can be (X-10)%<SOC<X, where X is the preset threshold and X-10 is the lower limit of the first power interval. The above two values ​​can be adaptively adjusted according to actual conditions and are not limited here. For example, when the value of X is 70, the second power interval is 60%<SOC<70%. When the value of X is 60, the second power interval is 50%<SOC<60%, that is, the second power interval is a power interval with a difference of 10% between the upper and lower limits. Among them, the value of X and the upper and lower limits of the interval can be adaptively adjusted according to the specific conditions of the vehicle and are not limited here.

[0050] When it is detected that the vehicle's charge level is within the first charge range and the engine water temperature is no greater than a preset temperature, the engine is started at the second speed and second rail pressure values. For example, the second engine speed can be set to 900 rpm, and the second rail pressure value P = Pa - 2 MPa, where Pa represents the first rail pressure calibration value, which is the rail pressure calibration value at idle speed at normal temperature and determined based on the second speed. 2 represents the first rail pressure adjustment value, which is a preset value determined based on the second speed and the first charge range and used to adjust the first rail pressure calibration value. The second rail pressure value is the difference between the first rail pressure calibration value and the first rail pressure adjustment value.

[0051] That is, if it is currently detected that the vehicle engine is on and charging and the water temperature is no greater than a preset water temperature, the engine startup idle speed is controlled to a preset second speed value, and the rail pressure is controlled to a preset second rail pressure value. In this case, if the vehicle engine is still in the above-mentioned conventional startup process, the rail pressure calibration value and the normal temperature idle speed calibration value are applied. During the high-pressure oil pump pumping process, due to improper rail pressure and speed settings, the impact energy of the relief valve cover seat is large, resulting in knocking sounds and abnormal noises. At this time, the engine is started using the control strategy corresponding to the preset low idle speed, the engine startup waiting speed is adjusted to the preset low idle speed value, and the rail pressure is reduced to avoid wear on the engine caused by improper speed and rail pressure settings. This can significantly reduce the frequency and volume of abnormal noises, or even eliminate the abnormal noises.

[0052] C: When the water temperature is not greater than the preset water temperature and the vehicle power level is within the second power range, the selected engine control strategy at least includes: the engine starting speed is the third speed value, and the rail pressure value is the third rail pressure value.

[0053] For example, the preset water temperature can be set to 10 degrees, and the second power interval can be set to (X-20)%≤SOC≤(X-10)%, where X is the preset threshold, X-20 is the lower limit of the second power interval, and X-10 is the upper limit of the second power interval, which is equal to the lower limit of the first power interval. The above three values ​​can be adaptively adjusted according to actual conditions and are not limited here. For example, when X is 70, the second power interval is 50%≤SOC≤60%. When X is 60, the second power interval is 40%≤SOC≤50%, that is, the second power interval is a power interval with a difference of 10% between the upper and lower limits. Among them, the value of X and the upper and lower limits of the interval can be adaptively adjusted according to the specific conditions of the vehicle and are not limited here.

[0054] When it is detected that the vehicle's charge level falls within the second charge range and the engine water temperature is no greater than a preset temperature, the engine is started at a third speed and a third rail pressure. For example, the third engine speed can be set to 1000 rpm, and the third rail pressure can be set to P = Pa - 5 MPa, where Pa represents the second rail pressure calibration value, which is the rail pressure calibration value at idle speed at normal temperature and determined based on the third speed. 5 represents the second rail pressure adjustment value, which is a preset value used to adjust the second rail pressure calibration value based on the third speed and the second charge range. The third rail pressure value is the difference between the second rail pressure calibration value and the second rail pressure adjustment value.

[0055] That is, if it is currently detected that the vehicle engine is on and charging and the water temperature is no greater than a preset water temperature, the engine startup idle speed is controlled to a preset third speed value, and the rail pressure is controlled to a preset third rail pressure value. In this case, if the vehicle engine is still in the above-mentioned conventional startup process, the rail pressure calibration value and the normal temperature idle speed calibration value are applied. During the high-pressure oil pump pumping process, due to improper rail pressure and speed settings, the overflow valve cover seat is hit with great energy, resulting in knocking sounds and abnormal noises. At this time, the engine is started using the control strategy corresponding to the preset medium idle speed, the engine startup waiting speed is adjusted to the preset medium idle speed value, and the rail pressure is reduced to avoid wear on the engine caused by improper speed and rail pressure settings. This can significantly reduce the frequency and volume of abnormal noises, or even eliminate them.

[0056] D: When the water temperature is not greater than the preset water temperature and the vehicle power level meets the third power range, the selected engine control strategy at least includes: the engine starting speed is the fourth speed value, and the rail pressure value is the fourth rail pressure value.

[0057] For example, the preset water temperature can be set to 10 degrees, and the third power interval can be SOC < (X-20)%, where X is the preset threshold, X-20 is the upper limit of the third power interval, and is equal to the lower limit of the second power interval. The above two values ​​can be adaptively adjusted according to actual conditions and are not limited here. For example, when X is 70, the third power interval is SOC < 50%. When X is 60, the third power interval is SOC < 60%, that is, the third power interval is a power interval with an upper limit value. The value of X and the upper limit of the interval can be adaptively adjusted according to the specific conditions of the vehicle and are not limited here.

[0058] When it is detected that the vehicle's charge level falls within the third charge range and the engine water temperature is no greater than a preset temperature, the engine is started at a fourth speed and a fourth rail pressure. For example, the fourth engine speed can be set to 1300 rpm, and the fourth rail pressure can be set to P = Pa - 8 MPa, where Pa represents the third rail pressure calibration value, which is the rail pressure calibration value at idle speed at normal temperature and determined based on the third speed. 8 represents the third rail pressure adjustment value, which is a preset value determined based on the fourth speed and the third charge range and used to adjust the third rail pressure calibration value. The fourth rail pressure value is the difference between the third rail pressure calibration value and the third rail pressure adjustment value.

[0059] That is, if it is currently detected that the vehicle engine is on and charging and the water temperature is no greater than a preset water temperature, the engine startup idle speed is controlled to a preset fourth speed value, and the rail pressure is controlled to a preset fourth rail pressure value. In this case, if the vehicle engine is still in the above-mentioned conventional startup process, the mismatched rail pressure calibration value and normal temperature idle speed calibration value are applied. During the high-pressure oil pump pumping process, due to improper rail pressure and speed settings, the impact energy of the relief valve cover seat is large, resulting in knocking sounds and abnormal noises. At this time, the engine is started using the preset high idle control strategy, the engine startup waiting speed is adjusted to the preset high idle value, and the rail pressure is reduced to avoid wear on the engine caused by improper speed and rail pressure settings. This can significantly reduce the frequency and volume of abnormal noises, or even eliminate them.

[0060] In actual application scenarios, when the cold engine is idling at 900rpm and the rail pressure is 20MPa, there is no knocking noise. When the rail pressure is adjusted to 35MPa, the knocking noise occurs with a high frequency. When the rail pressure is adjusted to 30MPa, the noise still exists, but the frequency is significantly reduced. For different vehicle models and other actual conditions, the various power ranges, rail pressure calibration values, rail pressure adjustment values, rail pressure values, or speed values ​​can be adaptively adjusted according to the main ideas in the above steps. The values ​​in the above steps are for example only and are not limited to the example values ​​and do not limit the protection range.

[0061] The engine control method, system, device, medium, and vehicle provided herein obtain the vehicle's battery charge and engine water temperature; then determine the engine starting speed and rail pressure based on these values. By deriving different remaining battery levels, the vehicle's battery charge is divided into segments, and the engine starting speed and rail pressure are adjusted based on the different segments, achieving differentiated control under different battery levels. This allows those skilled in the art to adjust the engine speed and rail pressure based on different conditions, resolving the issue of loud oil pump knocking noise.

[0062] The above are some specific implementations of the engine control method provided in the embodiment of the present application. Based on this, the present application also provides a corresponding system for engine control. The system provided in the embodiment of the present application will be introduced from the perspective of functional modularization. Figure 2 This is a structural diagram of an engine control system provided in an embodiment of the present application.

[0063] The present application also provides an engine control system, including:

[0064] An acquisition unit 201 is used to acquire vehicle power and engine water temperature;

[0065] A strategy selection unit 202 is configured to select an engine control strategy based on the vehicle power level and the engine water temperature, wherein the engine control strategy is configured to indicate segmented adjustment of the engine speed and rail pressure based on the vehicle power level;

[0066] The control unit 203 is used to control the engine starting speed and rail pressure value according to the engine control strategy.

[0067] Optionally, the strategy selection unit is specifically used to select the engine control strategy when the vehicle power is not greater than a preset threshold and the water temperature is greater than a preset water temperature, at least including: the engine starting speed is a first speed value, and the rail pressure value is a first rail pressure value.

[0068] An embodiment of the present application provides a device, which includes a memory and a processor, wherein the memory is used to store instructions or codes, and the processor is used to execute the instructions or codes so that the device performs any of the aforementioned engine control methods.

[0069] An embodiment of the present application provides a computer storage medium having codes stored therein. When the codes are executed, a device executing the codes implements any one of the aforementioned engine control methods.

[0070] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the systems or devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0071] It should be understood that in this application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following items" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0072] It should also be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

[0073] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein may be implemented directly using hardware, a software module executed by a processor, or a combination of the two. The software module may be placed in a random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0074] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine control method, characterized in that: include: Get vehicle power and engine water temperature; Selecting an engine control strategy according to the vehicle power and the engine water temperature, the engine control strategy being used to instruct segmented adjustment of the engine speed and rail pressure according to the vehicle power; controlling the engine starting speed and rail pressure value according to the engine control strategy; The selecting of the engine control strategy according to the vehicle power and the engine water temperature includes: When the vehicle charge is not greater than a preset threshold and the water temperature is greater than a preset water temperature, the selected engine control strategy includes at least: the engine starting speed is a first speed value, and the rail pressure is a first rail pressure value; the first speed value is a calibrated value determined according to the vehicle charge and the water temperature, and the first rail pressure value is a calibrated value determined according to the first speed value; The selecting of the engine control strategy according to the vehicle power and the engine water temperature includes: When the water temperature is not greater than the preset water temperature and the vehicle power level meets the first power range, the selected engine control strategy at least includes: the engine starting speed is the second speed value, the rail pressure value is the second rail pressure value; the first power range is: ((X-10)%, X), X is the preset threshold value; the second rail pressure value P=Pa-2MPa; Pa is the first rail pressure calibration value, the first rail pressure calibration value is determined according to the second speed value, and 2 is the first rail pressure adjustment value; The selecting of the engine control strategy according to the vehicle power and the engine water temperature includes: When the water temperature is not greater than the preset water temperature and the vehicle power level meets the second power range, the selected engine control strategy at least includes: the engine starting speed is a third speed value, the rail pressure value is a third rail pressure value; the second power range is: ((X-20)%, (X-10)%); the third rail pressure value P=Pa-5MPa, where Pa is a second rail pressure calibration value, the second rail pressure calibration value is determined according to the third speed value, and 5 is a second rail pressure adjustment value; The selecting of the engine control strategy according to the vehicle power and the engine water temperature includes: When the water temperature is not greater than the preset water temperature and the vehicle power level meets the third power range, the selected engine control strategy at least includes: the engine starting speed is a fourth speed value, the rail pressure value is a fourth rail pressure value; the third power range is: (0, (X-20)%); the fourth rail pressure value P=Pa-8MPa, where Pa is a third rail pressure calibration value, the third rail pressure calibration value is determined according to the fourth speed value, and 8 is a third rail pressure adjustment value; The second speed value is smaller than the third speed value; and the third speed value is smaller than the fourth speed value.

2. An engine control system, characterized in that: include: An acquisition unit, used to obtain vehicle power and engine water temperature; a strategy selection unit, configured to select an engine control strategy based on the vehicle power level and the engine water temperature, wherein the engine control strategy is configured to indicate segmented adjustment of the engine speed and rail pressure based on the vehicle power level; A control unit, configured to control the engine starting speed and rail pressure value according to the engine control strategy; The selecting of the engine control strategy according to the vehicle power and the engine water temperature includes: When the vehicle charge is not greater than a preset threshold and the water temperature is greater than a preset water temperature, the selected engine control strategy includes at least: the engine starting speed is a first speed value, and the rail pressure is a first rail pressure value; the first speed value is a calibrated value determined according to the vehicle charge and the water temperature, and the first rail pressure value is a calibrated value determined according to the first speed value; The selecting of the engine control strategy according to the vehicle power and the engine water temperature includes: When the water temperature is not greater than the preset water temperature and the vehicle power level meets the first power range, the selected engine control strategy at least includes: the engine starting speed is the second speed value, the rail pressure value is the second rail pressure value; the first power range is: ((X-10)%, X), X is the preset threshold value; the second rail pressure value P=Pa-2MPa; Pa is the first rail pressure calibration value, the first rail pressure calibration value is determined according to the second speed value, and 2 is the first rail pressure adjustment value; The selecting of the engine control strategy according to the vehicle power and the engine water temperature includes: When the water temperature is not greater than the preset water temperature and the vehicle power level meets the second power range, the selected engine control strategy at least includes: the engine starting speed is a third speed value, the rail pressure value is a third rail pressure value; the second power range is: ((X-20)%, (X-10)%); the third rail pressure value P=Pa-5MPa, where Pa is a second rail pressure calibration value, the second rail pressure calibration value is determined according to the third speed value, and 5 is a second rail pressure adjustment value; The selecting of the engine control strategy according to the vehicle power and the engine water temperature includes: When the water temperature is not greater than the preset water temperature and the vehicle power level meets the third power range, the selected engine control strategy at least includes: the engine starting speed is a fourth speed value, the rail pressure value is a fourth rail pressure value; the third power range is: (0, (X-20)%); the fourth rail pressure value P=Pa-8MPa, where Pa is a third rail pressure calibration value, the third rail pressure calibration value is determined according to the fourth speed value, and 8 is a third rail pressure adjustment value; The second speed value is smaller than the third speed value; and the third speed value is smaller than the fourth speed value.

3. An electronic device, characterized in that: include: Processor, memory, system bus; The processor and the memory are connected via the system bus; The memory is used to store one or more programs, wherein the one or more programs include instructions, and when the instructions are executed by the processor, the processor is caused to perform the engine control method of claim 1 .

4. A computer-readable storage medium, characterized in that The computer-readable storage medium stores codes, and when the codes are executed, a device executing the codes implements the engine control method according to claim 1 .

5. A vehicle, characterized in that: The vehicle includes a central electronic control module, which is used to execute the engine control method according to claim 1.

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