Engine high rail pressure alarm protection method and related device

Abstract

The present application provides an engine high rail pressure alarm protection method and related devices, the method comprising: real-time monitoring of the rail pressure of the engine's high-pressure oil rail; if the rail pressure is greater than a first preset threshold and less than or equal to a maximum rail pressure target value, controlling the engine's oil pump to stop pumping oil until the rail pressure is less than a second preset threshold; if the rail pressure is greater than the maximum rail pressure target value, limiting the engine's torque output. When the rail pressure is too high but not higher than the maximum rail pressure target value, the present application controls the high-pressure oil rail to reduce pressure by stopping pumping oil to prevent the rail pressure from continuing to rise; it can not only effectively prevent the high-pressure oil rail from having too high a pressure, but also reduce the situation where the vehicle is unable to accelerate due to the high rail pressure alarm, thereby improving the stability of the vehicle.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to an engine high rail pressure alarm protection method and related devices. Background Art

[0002] During the development of the dual-injection system, the applicant discovered that when the target rail pressure and vehicle speed continue to increase during vehicle driving, if the engine speed and torque suddenly drop, the actual oil rail pressure will exceed the target pressure, triggering the hardware protection logic to report a high engine rail pressure fault, lighting up the engine fault indicator light and triggering a high oil pressure fault. At this time, the vehicle will switch to the engine torque limiting mode, resulting in the entire vehicle being unable to accelerate. Summary of the invention

[0003] The present application provides an engine high rail pressure alarm protection method and related devices to solve the problem of the whole vehicle being unable to accelerate due to the high rail pressure fault triggering the vehicle to switch to a torque-limiting mode.

[0004] In a first aspect, the present application provides an engine high rail pressure alarm protection method, comprising:

[0005] Real-time monitoring of the rail pressure of the engine's high-pressure oil rail;

[0006] If the rail pressure is greater than a first preset threshold and less than or equal to a maximum rail pressure target value, the oil pump of the engine is controlled to stop pumping oil until the rail pressure is less than a second preset threshold; the second preset threshold is less than or equal to the first preset threshold; the maximum rail pressure target value is greater than the first preset threshold;

[0007] If the rail pressure is greater than the maximum rail pressure target value, the torque output of the engine is limited.

[0008] Preferably, if the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value, controlling the oil pump of the engine to stop pumping oil comprises:

[0009] If the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value for a duration that reaches a first preset duration, the oil pump is controlled to stop pumping oil.

[0010] Preferably, controlling the oil pump of the engine to stop pumping oil comprises:

[0011] A continuous power-off signal is sent to the oil pump, wherein the continuous power-off signal is used to instruct the oil pump to stop working and control the overflow valve to maintain a normally open state.

[0012] Preferably, the method further comprises:

[0013] If the rail pressure is greater than the maximum rail pressure target value, an alarm signal is generated.

[0014] Preferably, if the rail pressure is greater than the maximum rail pressure target value, limiting the torque output of the engine comprises:

[0015] If the cumulative duration during which the rail pressure is greater than the maximum rail pressure target value exceeds a second preset duration within a preset time period, the torque output of the engine is limited until the rail pressure drops to a third preset threshold; the third preset threshold is less than the second preset threshold.

[0016] In a second aspect, the present application provides an engine high rail pressure alarm protection device, which includes:

[0017] Rail pressure monitoring module, used for real-time monitoring of the rail pressure of the engine's high-pressure oil rail;

[0018] a first control module, configured to control the oil pump of the engine to stop pumping oil if the rail pressure is greater than a first preset threshold and less than or equal to a maximum rail pressure target value, until the rail pressure is less than a second preset threshold; the second preset threshold is less than or equal to the first preset threshold; and the maximum rail pressure target value is greater than the first preset threshold;

[0019] The second control module is configured to limit the torque output of the engine if the rail pressure is greater than the maximum rail pressure target value.

[0020] Preferably, the first control module specifically includes:

[0021] If the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value for a duration that reaches a first preset duration, the oil pump is controlled to stop pumping oil.

[0022] Preferably, the first control module specifically includes:

[0023] A continuous power-off signal is sent to the oil pump, wherein the continuous power-off signal is used to instruct the oil pump to stop working and control the overflow valve to maintain a normally open state.

[0024] Preferably, the engine high rail pressure alarm protection device further comprises:

[0025] The alarm module is configured to generate an alarm signal if the rail pressure is greater than the maximum rail pressure target value.

[0026] Preferably, the second control module includes:

[0027] If the cumulative duration during which the rail pressure is greater than the maximum rail pressure target value exceeds a second preset duration within a preset time period, the torque output of the engine is limited until the rail pressure drops to a third preset threshold; the third preset threshold is less than the second preset threshold.

[0028] In a third aspect, the present application provides a controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of the method described in the first aspect or any possible implementation of the first aspect are implemented.

[0029] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, it implements the steps of the method described in the first aspect or any possible implementation method of the first aspect.

[0030] In a fifth aspect, the present application provides a vehicle comprising a controller as described in the third aspect.

[0031] The embodiment of the present application provides an engine high rail pressure alarm protection method and related devices. When the rail pressure of the high-pressure oil rail is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value, the method controls the pressure reduction of the high-pressure oil rail by stopping the oil pump to prevent the rail pressure from continuing to increase; and limits the torque output of the engine only when the rail pressure of the high-pressure oil rail is greater than the maximum rail pressure target value, thereby effectively preventing the situation where the rail pressure of the high-pressure oil rail is too high, and reducing the situation where the whole vehicle is unable to accelerate due to the high rail pressure alarm, thereby improving the stability of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 paying creative labor.

[0033] Figure 1 This is an application scenario diagram of the engine high rail pressure alarm protection method provided in an embodiment of the present application;

[0034] Figure 2 is a flow chart for implementing the engine high rail pressure alarm protection method provided in an embodiment of the present application;

[0035] Figure 3 It is a structural schematic diagram of an engine high rail pressure alarm protection device provided in an embodiment of the present application;

[0036] Figure 4 It is a schematic diagram of a controller provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0038] In order to make the purpose, technical solutions and advantages of the present application clearer, specific embodiments will be described below in conjunction with the accompanying drawings.

[0039] Figure 1 This is an application scenario diagram of the engine high rail pressure alarm protection method provided in the embodiment of the present application. Figure 1 As shown, the key components of the engine fuel supply system include: a high-pressure fuel pump inlet 1, a high-pressure fuel pump outlet 2, a high-pressure fuel rail inlet pipe 3, a high-pressure fuel rail and a fuel injector 4; wherein, the high-pressure fuel pump inlet 1 is connected to the fuel supply device outlet, the high-pressure fuel pump outlet 2 is connected to the high-pressure fuel rail inlet pipe 3, and the high-pressure outlet of the high-pressure fuel rail is connected to the fuel injector.

[0040] Specifically, the high-pressure rail is used to store fuel and suppress pressure fluctuations caused by the high-pressure oil pump and the injector to ensure stable system pressure. The injector is used to realize fuel injection and accurately control the amount of fuel injection. Under normal circumstances, low-pressure oil is converted into high-pressure oil by the high-pressure oil pump and enters the high-pressure rail. The high-pressure oil control amount is determined by the opening of the oil metering unit on the high-pressure oil pump to ensure that the actual rail pressure of the high-pressure rail follows the rail pressure target value. However, when the engine requires a sudden drop in the rail pressure, the pressure relief speed through the oil metering unit is not enough, and the rail pressure of the high-pressure rail will exceed the rail pressure target value, causing a high rail pressure alarm.

[0041] See also Figure 2 , which shows a flowchart of the implementation of the engine high rail pressure alarm protection method provided by the embodiment of the present application. The execution subject of the process can be the engine controller, which is described in detail as follows:

[0042] S101: Real-time monitoring of the rail pressure of the high-pressure fuel rail of the engine.

[0043] During the operation of the engine, the engine controller may obtain the pressure of the high-pressure fuel rail through a pressure sensor disposed on the high-pressure fuel rail.

[0044] Specifically, the rail pressure mentioned in this embodiment is the abbreviation of the pressure in the high-pressure oil rail.

[0045] S102: If the rail pressure is greater than a first preset threshold and less than or equal to a maximum rail pressure target value, control the oil pump of the engine to stop pumping oil until the rail pressure is less than a second preset threshold; the second preset threshold is less than or equal to the first preset threshold; and the maximum rail pressure target value is greater than the first preset threshold.

[0046] In this embodiment, the maximum rail pressure target value is the rail pressure target value corresponding to the maximum engine speed. The first preset threshold is slightly smaller than the maximum rail pressure target value. The engine controller controls the high-pressure oil volume so that the actual rail pressure value of the high-pressure oil rail follows the rail pressure setting value. In order to ensure the stable operation of the vehicle and avoid the vehicle frequently switching to the torque limiting mode due to the high rail pressure alarm, this embodiment does not perform a high rail pressure alarm when the actual rail pressure value exceeds the rail pressure setting value. Instead, when it is detected that the rail pressure of the high-pressure oil rail is greater than the first preset threshold value and less than or equal to the maximum rail pressure target value, that is, when it is detected that the rail pressure is too high but not higher than the maximum rail pressure target value, the high rail pressure protection logic is triggered, and the engine oil pump is controlled to stop pumping oil, so that the rail pressure of the high-pressure oil rail is quickly reduced to below the second preset threshold value.

[0047] Specifically, since it is still necessary to ensure that the fuel in the pipeline can support engine combustion and avoid engine stalling when the high rail pressure protection logic is triggered, it is sufficient to make the rail pressure drop slightly when the high rail pressure protection logic is triggered. Therefore, when setting several preset thresholds, the second preset threshold can be set to be slightly smaller than the first preset threshold.

[0048] For example, if the maximum rail pressure target value is 40 MPa, the first preset threshold value may be set to 38 MPa, and the second preset threshold value may be set to 35 MPa.

[0049] S103: If the rail pressure is greater than the maximum rail pressure target value, limiting the torque output of the engine.

[0050] In this embodiment, if the rail pressure of the high-pressure fuel rail is greater than the maximum rail pressure target value, the engine switches to the torque limiting mode to reduce the output torque of the engine, thereby reducing the pressure of the high-pressure fuel rail.

[0051] It can be seen from the above embodiments that the method provided in this embodiment controls the high-pressure oil rail to rapidly reduce the pressure by stopping the oil pump when the rail pressure of the high-pressure oil rail is greater than the first preset threshold value and less than or equal to the maximum rail pressure target value, so as to prevent the rail pressure from continuing to increase; and limits the torque output of the engine only when the rail pressure of the high-pressure oil rail is greater than the maximum rail pressure target value, thereby not only effectively avoiding the situation where the rail pressure of the high-pressure oil rail is too high, but also achieving the effect of hardware protection on the basis of realizing oil pressure control, reducing the situation where the whole vehicle is unable to accelerate due to the high rail pressure alarm, and improving the stability of the vehicle.

[0052] In one embodiment of the present application, the specific implementation process of S102 includes:

[0053] If the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value for a duration that reaches a first preset duration, the oil pump is controlled to stop pumping oil.

[0054] In this embodiment, in order to avoid the situation where the rail pressure occasionally fluctuates greatly and exceeds the first preset threshold value, this embodiment can start timing when monitoring that the rail pressure is greater than the first preset threshold value and less than or equal to the maximum rail pressure target value, and monitor the duration of the rail pressure being greater than the first preset threshold value and less than or equal to the maximum rail pressure target value. If the duration exceeds the first preset duration, it can be determined that the rail pressure is too high, and the oil pump is controlled to stop pumping oil until the rail pressure is monitored to be lower than the second preset threshold value, and then the oil pump is controlled to resume normal operation.

[0055] Exemplarily, the first preset duration may be 2 seconds.

[0056] In one embodiment of the present application, the specific implementation process of controlling the oil pump of the engine to stop pumping oil in S102 includes:

[0057] A continuous power-off signal is sent to the oil pump, wherein the continuous power-off signal is used to instruct the oil pump to stop working and control the overflow valve to maintain a normally open state.

[0058] In this embodiment, when it is monitored that the rail pressure of the high-pressure oil rail is greater than the first preset threshold value and less than or equal to the maximum rail pressure target value for a continuous period reaching the first preset period, the engine controller sends a continuous power-off signal to forcibly shut down the oil pump drive control to stop the oil pump from working.

[0059] Specifically, the overflow valve in the oil pump is used to increase the pressure of the fuel entering the oil pump and then enter the high-pressure oil rail in the closed state. In order to prevent the rail pressure from continuing to increase, the overflow valve needs to be controlled to remain in a normally open state during the high rail pressure protection period. If the rail pressure of the high-pressure oil rail is monitored to be less than the second preset threshold, the drive control of the oil pump is restored, and the overflow valve is controlled to close.

[0060] In one embodiment, the implementation process of the engine high rail pressure alarm protection method provided by the present application also includes:

[0061] If the rail pressure is greater than the maximum rail pressure target value, an alarm signal is generated.

[0062] In this embodiment, when an alarm signal is generated, the engine controller sends the alarm signal to the vehicle controller, and the vehicle controller controls the high rail pressure warning light set on the front operating console of the vehicle or the high rail pressure warning symbol on the central control screen to light up according to the alarm signal, so as to promptly remind the driver of the specific engine conditions.

[0063] In one embodiment, the specific implementation process of S103 includes:

[0064] If the cumulative duration during which the rail pressure is greater than the maximum rail pressure target value exceeds a second preset duration within a preset time period, the torque output of the engine is limited until the rail pressure drops to a third preset threshold; the third preset threshold is less than the second preset threshold.

[0065] In this embodiment, the time when the rail pressure of the high-pressure fuel rail is first monitored to be greater than the maximum rail pressure target value is taken as the starting point. Within a preset time period after the starting point, the duration of each time when the rail pressure is greater than the maximum rail pressure target value is monitored and accumulated. If the accumulated duration of the rail pressure greater than the maximum rail pressure target value within the preset time period exceeds a second preset duration, the engine is controlled to switch to the torque limiting mode until the rail pressure of the high-pressure fuel rail drops below a third preset threshold value, and the engine operating mode is restored to the normal operating mode.

[0066] Furthermore, the method for limiting the torque output of the engine may specifically include:

[0067] The time when the rail pressure is detected to be greater than the maximum rail pressure target value within the preset time period and the accumulated time period exceeding the second preset time period is taken as the target time, the difference between the rail pressure at the target time and the maximum rail pressure target value is calculated, and the torque limiting degree for limiting the torque output is determined according to the difference between the rail pressure at the target time and the maximum rail pressure target value, and the larger the difference is, the larger the torque limiting degree is, so as to accelerate the speed at which the rail pressure drops to the third preset threshold value.

[0068] Exemplarily, the third preset threshold may be 0.05 MPa, the second preset time length may be 10 seconds, and the preset time period may be 20 seconds.

[0069] Through the above method, this embodiment can significantly reduce the pressure of the high-pressure oil rail by limiting the torque output when it is determined that the rail pressure exceeds the maximum rail pressure target value, so that the oil pressure can be well controlled.

[0070] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0071] The following is an embodiment of the device of the present application. For details not described in detail, please refer to the corresponding method embodiment described above.

[0072] Figure 3 The structural diagram of the engine high rail pressure alarm protection device provided by the embodiment of the present application is shown. For the convenience of explanation, only the part related to the embodiment of the present application is shown, which is described in detail as follows:

[0073] like Figure 3 As shown, the engine high rail pressure alarm protection device 100 includes:

[0074] A rail pressure monitoring module 110 is used to monitor the rail pressure of the high-pressure oil rail of the engine in real time;

[0075] The first control module 120 is used to control the oil pump of the engine to stop pumping oil if the rail pressure is greater than a first preset threshold and less than or equal to a maximum rail pressure target value, until the rail pressure is less than a second preset threshold; the second preset threshold is less than or equal to the first preset threshold; the maximum rail pressure target value is greater than the first preset threshold;

[0076] The second control module 130 is configured to limit the torque output of the engine if the rail pressure is greater than the maximum rail pressure target value.

[0077] Preferably, the first control module 120 specifically includes:

[0078] If the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value for a duration that reaches a first preset duration, the oil pump is controlled to stop pumping oil.

[0079] Preferably, the first control module 120 specifically includes:

[0080] A continuous power-off signal is sent to the oil pump, wherein the continuous power-off signal is used to instruct the oil pump to stop working and control the overflow valve to maintain a normally open state.

[0081] Preferably, the engine high rail pressure alarm protection device 100 further includes:

[0082] The alarm module is configured to generate an alarm signal if the rail pressure is greater than the maximum rail pressure target value.

[0083] Preferably, the second control module 130 includes:

[0084] If the cumulative duration during which the rail pressure is greater than the maximum rail pressure target value exceeds a second preset duration within a preset time period, the torque output of the engine is limited until the rail pressure drops to a third preset threshold; the third preset threshold is less than the second preset threshold.

[0085] It can be seen from the above embodiments that the device provided in this embodiment controls the pressure reduction of the high-pressure oil rail by stopping the oil pump when the rail pressure of the high-pressure oil rail is greater than the first preset threshold value and less than or equal to the maximum rail pressure target value, so as to prevent the rail pressure from continuing to increase; and limits the torque output of the engine only when the rail pressure of the high-pressure oil rail is greater than the maximum rail pressure target value, thereby effectively avoiding the situation where the rail pressure of the high-pressure oil rail is too high, and reducing the situation where the whole vehicle is unable to accelerate due to the high rail pressure alarm, thereby improving the stability of the vehicle.

[0086] The present application also provides a computer program product having a program code, which executes the steps of any of the above engine high rail pressure alarm protection method embodiments when the program code is executed in a corresponding processor, controller, computing device or controller, such as Figure 2 Steps 101 to 103 shown. Those skilled in the art will appreciate that the method and the device of the embodiment of the present application can be implemented in various forms of hardware, software, firmware, a dedicated processor or a combination thereof. The dedicated processor may include an application specific integrated circuit (ASIC), a reduced instruction set computer (RISC) and / or a field programmable gate array (FPGA). The proposed method and device are preferably implemented as a combination of hardware and software. The software is preferably installed on a program storage device as an application. It is typically based on a machine with a computer platform having hardware, such as one or more central processing units (CPUs), random access memories (RAMs) and one or more input / output (I / O) interfaces. An operating system is typically also installed on the computer platform. The various processes and functions described here may be part of an application, or a part thereof may be executed by an operating system.

[0087] Figure 4 is a schematic diagram of a controller provided in an embodiment of the present application. Figure 4 As shown, the controller 4 of this embodiment includes: a processor 40, a memory 41, and a computer program 42 stored in the memory 41 and executable on the processor 40. When the processor 40 executes the computer program 42, the steps in the above-mentioned engine high rail pressure alarm protection method embodiments are implemented, for example Figure 2 Alternatively, when the processor 40 executes the computer program 42, the functions of each module / unit in the above-mentioned device embodiments are realized, for example Figure 3 The functions of the modules 110 to 130 are shown.

[0088] Exemplarily, the computer program 42 may be divided into one or more modules / units, which are stored in the memory 41 and executed by the processor 40 to complete / implement the solution provided by the present application. The one or more modules / units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program 42 in the controller 4. For example, the computer program 42 may be divided into Figure 3 Modules 110 to 130 are shown.

[0089] The controller 4 may include, but is not limited to, a processor 40 and a memory 41. Those skilled in the art will appreciate that Figure 4It is only an example of the controller 4 and does not constitute a limitation of the controller 4. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the controller may also include input and output devices, network access devices, buses, etc.

[0090] The processor 40 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0091] The memory 41 may be an internal storage unit of the controller 4, such as a hard disk or memory of the controller 4. The memory 41 may also be an external storage device of the controller 4, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the controller 4. Further, the memory 41 may also include both an internal storage unit of the controller 4 and an external storage device. The memory 41 is used to store the computer program and other programs and data required by the controller. The memory 41 may also be used to temporarily store data that has been output or is to be output.

[0092] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0093] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0094] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0095] In the embodiments provided in the present application, it should be understood that the disclosed devices / controllers and methods can be implemented in other ways. For example, the device / controller embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0096] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0097] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0098] If the integrated module / unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by the processor, the steps of the above-mentioned engine high rail pressure alarm protection method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device that can carry the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practices in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practices, computer-readable media does not include electrical carrier signals and telecommunication signals.

[0099] In addition, the embodiments shown in the drawings of the present application or the features of the various embodiments mentioned in this specification are not necessarily understood as independent embodiments. Instead, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the drawings.

[0100] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. An engine high rail pressure alarm protection method, characterized in that: include: Real-time monitoring of the rail pressure of the engine's high-pressure oil rail; If the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value, controlling an oil pump of the engine to stop pumping oil until the rail pressure is less than a second preset threshold value; The second preset threshold is less than or equal to the first preset threshold; The maximum rail pressure target value is greater than the first preset threshold; If the rail pressure is greater than the maximum rail pressure target value, limiting the torque output of the engine; The maximum rail pressure target value is the rail pressure target value corresponding to the maximum engine speed.

2. The engine high rail pressure alarm protection method according to claim 1, characterized in that: If the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value, controlling the oil pump of the engine to stop pumping oil includes: If the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value for a duration that reaches a first preset duration, the oil pump is controlled to stop pumping oil.

3. The engine high rail pressure alarm protection method according to claim 1, characterized in that: The controlling the oil pump of the engine to stop pumping oil comprises: A continuous power-off signal is sent to the oil pump, wherein the continuous power-off signal is used to instruct the oil pump to stop working and control the overflow valve to maintain a normally open state.

4. The engine high rail pressure alarm protection method according to claim 1, characterized in that: The method further comprises: If the rail pressure is greater than the maximum rail pressure target value, an alarm signal is generated.

5. The engine high rail pressure alarm protection method according to claim 1, characterized in that: If the rail pressure is greater than the maximum rail pressure target value, limiting the torque output of the engine includes: If the cumulative duration during which the rail pressure is greater than the maximum rail pressure target value exceeds a second preset duration within a preset time period, the torque output of the engine is limited until the rail pressure drops to a third preset threshold; the third preset threshold is less than the second preset threshold.

6. An engine high rail pressure alarm protection device, characterized in that: include: Rail pressure monitoring module, used for real-time monitoring of the rail pressure of the engine's high-pressure oil rail; a first control module, configured to control an oil pump of the engine to stop pumping oil if the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value, until the rail pressure is less than a second preset threshold value; The second preset threshold is less than or equal to the first preset threshold; The maximum rail pressure target value is greater than the first preset threshold; a second control module, configured to limit the torque output of the engine if the rail pressure is greater than the maximum rail pressure target value; The maximum rail pressure target value is the rail pressure target value corresponding to the maximum engine speed.

7. The engine high rail pressure alarm protection device according to claim 6, characterized in that: The first control module specifically includes: If the rail pressure is greater than a first preset threshold value and less than or equal to a maximum rail pressure target value for a duration that reaches a first preset duration, the oil pump is controlled to stop pumping oil.

8. A controller comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the engine high rail pressure warning protection method as described in any one of claims 1 to 5 are implemented.

9. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the engine high rail pressure warning protection method as described in any one of claims 1 to 5 are implemented.

10. A vehicle, characterized in that: Comprising a controller as claimed in claim 8.

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