Engine oil pressure monitoring method, device, system, vehicle control unit and storage medium

Abstract

The present application relates to the technical field of vehicle control, and discloses an engine oil pressure monitoring method, device, system, vehicle controller and storage medium, wherein the engine oil pressure monitoring method comprises the following steps: obtaining an actual engine oil pressure value sent by an engine control unit, wherein the engine control unit sends the actual engine oil pressure value to the vehicle controller when the actual engine oil pressure value is less than a preset first threshold value; determining whether the actual engine oil pressure value is less than a preset second threshold value and greater than a preset third threshold value; when the actual engine oil pressure value is less than the second threshold value and greater than the third threshold value, adjusting the engine speed based on the actual engine oil pressure value; and when the actual engine oil pressure value is less than the third threshold value, issuing an engine shutdown instruction. Therefore, the driver cannot drive due to false positives, thereby affecting the experience of the driver. Moreover, through the adjustment of the engine speed, the engine can run in a safe range and be free from damage.

Description

Technical Field

[0001] This invention relates to the field of vehicle control technology, specifically to an oil pressure monitoring method, device, system, vehicle controller, and storage medium. Background Technology

[0002] When the engine is running, the oil pressure must be kept within a reasonable range. If the oil pressure is abnormal, it will damage the engine's lubrication conditions, resulting in poor lubrication, cooling and cleaning, which will further cause adhesive wear of parts and damage the engine.

[0003] The purpose of this study is to monitor oil pressure by setting a limit in the engine control unit (ECU). If the actual oil pressure obtained by the oil pressure sensor is less than this limit, the oil pressure is considered to be abnormal.

[0004] However, in actual use, it has been found that the limit cannot be set very precisely due to the influence of the engine's operating environment. If the limit is set too high, false alarms may occur regarding whether the oil pressure is abnormal. That is, the oil pressure may be normal, but because the limit is set too high, it may be judged that the actual oil pressure is lower than the limit, thus generating a false alarm and affecting the driver's experience. If the limit is set too low, in some cases, the oil pressure may actually be abnormal before it is detected, which could damage the engine. Therefore, it is clear that the current method for determining whether the oil pressure is abnormal still needs improvement. Summary of the Invention

[0005] In view of this, the present invention provides an oil pressure monitoring method, device, system, vehicle controller, and storage medium to solve the problem that when determining whether the oil pressure is abnormal by setting a limit value in the engine control unit (ECU), if the limit value is set too high, false alarms will occur, and if the limit value is set too low, the engine will be damaged.

[0006] In a first aspect, embodiments of the present invention provide an oil pressure monitoring method applied to a vehicle controller. The oil pressure monitoring method includes the following steps: acquiring an actual oil pressure value sent by an engine control unit, wherein the engine control unit sends the actual oil pressure value to the vehicle controller when the actual oil pressure value is less than a preset first threshold; determining whether the actual oil pressure value is less than a preset second threshold and greater than a preset third threshold; adjusting the engine speed based on the actual oil pressure value when the actual oil pressure value is less than the second threshold and greater than the third threshold; and issuing an engine shutdown command when the actual oil pressure value is less than the third threshold; wherein the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold.

[0007] The oil pressure monitoring method provided in this invention involves the vehicle controller acquiring the actual oil pressure value sent by the engine control unit. When the actual oil pressure value is less than a preset first threshold, the engine control unit sends the actual oil pressure value to the vehicle controller. Then, it determines whether the actual oil pressure value is less than a preset second threshold and greater than a preset third threshold. When the actual oil pressure value is less than the second threshold and greater than the third threshold, the engine speed is adjusted based on the actual oil pressure value. When the actual oil pressure value is less than the third threshold, an engine shutdown command is issued. In other words, this invention compares the actual oil pressure value with the first, second, and third thresholds respectively, and uses different processing methods based on different comparison results. Specifically, when the actual oil pressure value is less than the second threshold and greater than the third threshold, the engine speed is adjusted based on the actual oil pressure value, thus preventing false alarms from causing the driver to be unable to drive and affecting the driver's experience. Furthermore, by adjusting the engine speed, the engine can operate within a safe range, preventing damage. In addition, since the oil pressure monitoring method uses the vehicle controller, the modification to the engine control unit is relatively small. Since the modification cost and difficulty of the engine control unit are relatively large, the embodiments of the present invention can reduce the modification cost and difficulty.

[0008] In one optional implementation, adjusting the engine speed based on the actual oil pressure value includes: obtaining the set engine speed; calculating the difference between the actual oil pressure value and a second threshold; obtaining an engine speed correction value based on the difference between the actual oil pressure value and the second threshold, and the set engine speed, so as to adjust the engine speed according to the speed correction value.

[0009] This allows for the determination of a suitable engine speed correction value, enabling the engine to operate within a safe range and avoid damage.

[0010] In one optional embodiment, the oil pressure monitoring method further includes the following steps: when the actual oil pressure value is less than a second threshold and greater than a third threshold, issuing a first alarm message; when the actual oil pressure value is less than the third threshold, issuing a second alarm message.

[0011] This allows for the issuance of different notification messages in different scenarios, not only reminding users but also enhancing their experience.

[0012] In one optional implementation, before determining whether the actual oil pressure value is less than a preset first threshold, the method further includes the following steps: obtaining the set engine speed; obtaining the preset correspondence between the engine speed and the pressure threshold; and obtaining the first threshold, the second threshold, and the third threshold based on the correspondence between the engine speed and the pressure threshold and the set engine speed.

[0013] This allows for more accurate setting of the first, second, and third thresholds.

[0014] In one optional implementation, obtaining the set engine speed includes: obtaining the engine throttle opening; obtaining a preset correspondence between the throttle opening and the engine speed; and obtaining the set engine speed based on the correspondence between the throttle opening and the engine speed, and the throttle opening.

[0015] This allows us to obtain the accurate engine speed setting.

[0016] Secondly, embodiments of the present invention also provide an oil pressure monitoring device applied to a vehicle controller. The method includes an acquisition module, a judgment module, a first processing module, and a second processing module. The acquisition module is used to acquire the actual oil pressure value sent by the engine control unit, wherein the engine control unit sends the actual oil pressure value to the vehicle controller when the actual oil pressure value is less than a preset first threshold. The judgment module is used to determine whether the actual oil pressure value is less than a preset second threshold and greater than a preset third threshold. The first processing module is used to adjust the engine speed based on the actual oil pressure value when the actual oil pressure value is less than the second threshold and greater than the third threshold. The second processing module is used to issue an engine shutdown command when the actual oil pressure value is less than the third threshold. The first threshold is greater than the second threshold, and the second threshold is greater than the third threshold.

[0017] Thirdly, embodiments of the present invention also provide a vehicle controller, including a memory and a processor, which are interconnected. The memory stores computer instructions, and the processor executes the computer instructions to perform the oil pressure monitoring method of the first aspect or any corresponding embodiment described above.

[0018] Fourthly, embodiments of the present invention also provide an oil pressure monitoring system, including an engine control unit and a vehicle controller as described in the third aspect.

[0019] In one alternative implementation, the engine control unit is further configured to issue a third alarm message when the actual oil pressure value is less than a first threshold.

[0020] Fifthly, embodiments of the present invention also provide a computer-readable storage medium storing computer instructions, which are used to cause a computer to execute the oil pressure monitoring method of the first aspect or any corresponding embodiment described above. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a flowchart of an oil pressure monitoring method according to an embodiment of the present invention;

[0023] Figure 2 This is a flowchart of another oil pressure monitoring method according to an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the engine speed correction principle according to an embodiment of the present invention;

[0025] Figure 4 This is a flowchart of another oil pressure monitoring method according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram illustrating an example of the correspondence between throttle opening and engine speed according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram illustrating an example of the correspondence between rotational speed and pressure threshold according to an embodiment of the present invention;

[0028] Figure 7 This is a structural block diagram of an oil pressure monitoring device according to an embodiment of the present invention;

[0029] Figure 8 This is a schematic diagram of the hardware structure of the vehicle controller according to an embodiment of the present invention;

[0030] Figure 9 This is a structural flowchart of the oil pressure monitoring system according to an embodiment of the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] According to an embodiment of the present invention, an embodiment of an oil pressure monitoring method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0033] This embodiment provides an oil pressure monitoring method that can be used in a vehicle controller. Figure 1 This is a flowchart of an oil pressure monitoring method according to an embodiment of the present invention, such as... Figure 1 As shown, the process includes the following steps:

[0034] Step S101: Obtain the actual oil pressure value sent by the engine control unit, wherein the engine control unit sends the actual oil pressure value to the vehicle controller when the actual oil pressure value is less than a preset first threshold.

[0035] Specifically, the actual oil pressure value can be obtained through a pressure sensor.

[0036] Step S102: Determine whether the actual oil pressure value is less than the preset second threshold and greater than the preset third threshold.

[0037] Among them, the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold.

[0038] Step S103: When the actual oil pressure value is less than the second threshold and greater than the third threshold, the engine speed is adjusted based on the actual oil pressure value.

[0039] Step S104: When the actual oil pressure value is less than the third threshold, issue a command to stop the engine.

[0040] The oil pressure monitoring method provided in this invention involves the vehicle controller acquiring the actual oil pressure value sent by the engine control unit. When the actual oil pressure value is less than a preset first threshold, the engine control unit sends the actual oil pressure value to the vehicle controller. Then, it determines whether the actual oil pressure value is less than a preset second threshold and greater than a preset third threshold. When the actual oil pressure value is less than the second threshold and greater than the third threshold, the engine speed is adjusted based on the actual oil pressure value. When the actual oil pressure value is less than the third threshold, an engine shutdown command is issued. In other words, this invention compares the actual oil pressure value with the first, second, and third thresholds respectively, and uses different processing methods based on different comparison results. Specifically, when the actual oil pressure value is less than the second threshold and greater than the third threshold, the engine speed is adjusted based on the actual oil pressure value, thus preventing false alarms from causing the driver to be unable to drive and affecting the driver's experience. Furthermore, by adjusting the engine speed, the engine can operate within a safe range, preventing damage. In addition, since the oil pressure monitoring method uses the vehicle controller, the modification to the engine control unit is relatively small. Since the modification cost and difficulty of the engine control unit are relatively large, the embodiments of the present invention can reduce the modification cost and difficulty.

[0041] This embodiment provides an oil pressure monitoring method that can be used in a vehicle controller. Figure 2 This is a flowchart of another oil pressure monitoring method according to an embodiment of the present invention, such as... Figure 2 As shown, the process includes the following steps:

[0042] Step S201: Obtain the actual oil pressure value sent by the engine control unit, wherein the engine control unit sends the actual oil pressure value to the vehicle controller when the actual oil pressure value is less than a preset first threshold.

[0043] Step S202: Determine whether the actual oil pressure value is less than the preset second threshold and greater than the preset third threshold.

[0044] Step S203: When the actual oil pressure value is less than the second threshold and greater than the third threshold, the engine speed is adjusted based on the actual oil pressure value.

[0045] In one optional implementation, when the actual oil pressure value is less than a second threshold and greater than a third threshold, adjusting the engine speed based on the actual oil pressure value includes the following steps:

[0046] Step S2031: When the actual oil pressure value is less than the second threshold and greater than the third threshold, obtain the engine's set speed.

[0047] Step S2032: Calculate the difference between the actual oil pressure value and the second threshold.

[0048] Step S2033: Obtain the engine speed correction value based on the difference between the actual oil pressure value and the second threshold and the engine's set speed, and adjust the engine speed according to the speed correction value.

[0049] For example, such as Figure 3 As shown, the engine speed correction value can be obtained using Formula 1 below.

[0050] N = N _ Sf(P _ OM-P _ O) Formula 1

[0051] Where N represents the speed correction value, N _ S indicates the set speed, P _ OM represents the second threshold, P _ O represents the actual oil pressure value, and f represents the correction factor.

[0052] exist Figure 3 In this context, APP_r represents the throttle opening.

[0053] In one optional implementation, the oil pressure monitoring method further includes: issuing a first alarm message when the actual oil pressure value is less than a second threshold and greater than a third threshold.

[0054] Step S204: When the actual oil pressure value is less than the third threshold, issue a command to stop the engine.

[0055] In one optional implementation, the oil pressure monitoring method further includes issuing a second alarm message when the actual oil pressure value is less than a third threshold.

[0056] In this embodiment of the invention, the actual oil pressure value is compared with a first threshold, a second threshold, and a third threshold, respectively. Different processing methods are adopted according to different comparison results. In particular, when the actual oil pressure value is less than the second threshold but greater than the third threshold, the engine speed is adjusted based on the actual oil pressure value. This prevents the driver from being unable to drive due to false alarms, thus avoiding affecting the driver's experience. Moreover, by adjusting the engine speed, the engine can be kept within a safe operating range and protected from damage.

[0057] This embodiment provides an oil pressure monitoring method that can be used in a vehicle controller. Figure 4 This is a flowchart of another oil pressure monitoring method according to an embodiment of the present invention, such as... Figure 4 As shown, the process includes the following steps:

[0058] Step S401: Obtain the engine throttle opening.

[0059] Step S402: Obtain the preset correspondence between throttle opening and engine speed.

[0060] Example, Figure 5 This illustrates the relationship between throttle opening and engine speed.

[0061] Step S403: Obtain the set engine speed based on the correspondence between throttle opening and engine speed, and the throttle opening.

[0062] Step S404: Obtain the preset correspondence between rotational speed and pressure threshold.

[0063] Example, Figure 6 This illustrates a relationship between rotational speed and pressure threshold. Figure 6 Oil pressure limit 1 is the first threshold mentioned above, oil pressure limit 2 is the second threshold mentioned above, and oil pressure limit 3 is the third threshold mentioned above.

[0064] Step S405: Obtain the first threshold, the second threshold, and the third threshold based on the correspondence between the rotation speed and the pressure threshold, and the set rotation speed.

[0065] Step S406: Obtain the actual oil pressure value sent by the engine control unit, wherein the engine control unit sends the actual oil pressure value to the vehicle controller when the actual oil pressure value is less than a preset first threshold.

[0066] Step S407: Determine whether the actual oil pressure value is less than the preset second threshold and greater than the preset third threshold.

[0067] Step S408: When the actual oil pressure value is less than the second threshold and greater than the third threshold, adjust the engine speed based on the actual oil pressure value. For details, please refer to [link to relevant documentation]. Figure 2 Step S203 of the illustrated embodiment will not be described again here.

[0068] Step S409: When the actual oil pressure value is less than the third threshold, issue an engine shutdown command. See details below. Figure 2 Step S204 of the illustrated embodiment will not be described again here.

[0069] In this embodiment of the invention, the actual oil pressure value is compared with a first threshold, a second threshold, and a third threshold, respectively. Different processing methods are adopted according to different comparison results. In particular, when the actual oil pressure value is less than the second threshold but greater than the third threshold, the engine speed is adjusted based on the actual oil pressure value. This prevents the driver from being unable to drive due to false alarms, thus avoiding affecting the driver's experience. Moreover, by adjusting the engine speed, the engine can be kept within a safe operating range and protected from damage.

[0070] This embodiment also provides an oil pressure monitoring device for implementing the above embodiments and preferred embodiments; details already described will not be repeated. As used below, the term "module" can refer to a combination of software and / or hardware that performs a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0071] This embodiment provides an oil pressure monitoring device, such as... Figure 7 As shown, it includes:

[0072] The acquisition module 701 is used to acquire the actual oil pressure value sent by the engine control unit, wherein the engine control unit sends the actual oil pressure value to the vehicle controller when the actual oil pressure value is less than a preset first threshold.

[0073] The judgment module 702 is used to determine whether the actual oil pressure value is less than a preset second threshold and greater than a preset third threshold.

[0074] The first processing module 703 is used to adjust the engine speed based on the actual oil pressure value when the actual oil pressure value is less than the second threshold and greater than the third threshold.

[0075] The second processing module 704 is used to issue an engine shutdown command when the actual oil pressure value is less than the third threshold.

[0076] Among them, the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold.

[0077] In one optional implementation, when the actual oil pressure value is less than the second threshold and greater than the third threshold, the first processing module 703 is specifically used to: obtain the set speed of the engine; calculate the difference between the actual oil pressure value and the second threshold; obtain the engine speed correction value based on the difference between the actual oil pressure value and the second threshold and the set speed of the engine, so as to adjust the engine speed according to the speed correction value.

[0078] In one optional implementation, when the actual oil pressure value is less than the second threshold and greater than the third threshold, the first processing module 703 is also used to issue a first alarm message.

[0079] In an optional implementation, when the actual oil pressure value is less than the third threshold, the second processing module 704 is further configured to: issue a second alarm message.

[0080] In one optional embodiment, the oil pressure monitoring device further includes a threshold determination module. The threshold determination module includes a set speed acquisition unit, a correspondence acquisition unit, and a threshold determination unit; the set speed acquisition unit is used to acquire a set engine speed; the correspondence acquisition unit is used to acquire a preset correspondence between engine speed and pressure thresholds; and the threshold determination unit is used to obtain a first threshold, a second threshold, and a third threshold based on the correspondence between engine speed and pressure thresholds and the set speed.

[0081] In one optional implementation, the set speed acquisition unit is specifically used to: acquire the engine throttle opening; acquire a preset correspondence between the throttle opening and the engine speed; and obtain the set engine speed based on the correspondence between the throttle opening and the engine speed, and the throttle opening.

[0082] In this embodiment, the oil pressure monitoring device is presented in the form of a functional unit. Here, a unit refers to an ASIC circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0083] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0084] This invention also provides a vehicle controller, which has the above-described features. Figure 7 The oil pressure monitoring device shown.

[0085] Please see Figure 8 , Figure 8 This is a schematic diagram of the structure of a vehicle controller provided in an optional embodiment of the present invention, such as... Figure 8As shown, the vehicle controller includes one or more processors 10, a memory 20, and interfaces for connecting the various components, including high-speed interfaces and low-speed interfaces. The various components communicate with each other via different buses and can be mounted on a common motherboard or otherwise as needed. The processors can process instructions executed within the vehicle controller, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple vehicle controllers can be connected, each providing some of the necessary operations (e.g., as a server array, a set of blade servers, or a multiprocessor system). Figure 8 Take a processor 10 as an example.

[0086] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GPA), or any combination thereof.

[0087] The memory 20 stores instructions executable by at least one processor 10 to cause at least one processor 10 to perform the method shown in the above embodiments.

[0088] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function. The data storage area may store data created based on the use of the vehicle controller as displayed on a mini-program landing page. Furthermore, the memory 20 may include high-speed random access memory and non-transient memory, such as at least one disk storage device, flash memory device, or other non-transient solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, which can be connected to the vehicle controller via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0089] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0090] The vehicle controller also includes an input device 30 and an output device 40. The processor 10, memory 20, input device 30, and output device 40 can be connected via a bus or other means. Figure 8 Taking the example of a connection between China and Israel via a bus.

[0091] Input device 30 can receive input digital or character information, and generate key signal inputs related to user settings and function control of the vehicle controller, such as a touch screen, keypad, mouse, trackpad, touchpad, indicator, one or more mouse buttons, trackball, joystick, etc. Output device 40 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some optional embodiments, the display device may be a touch screen.

[0092] This invention also provides an oil pressure monitoring system, including an engine control unit and a vehicle controller. For example,... Figure 9 As shown, the oil pressure monitoring system includes an oil pressure sensor, an engine control unit, a vehicle controller, and actuators.

[0093] The engine control unit is also used to issue a third alarm message, such as adding engine oil, when the actual oil pressure value is less than the first threshold.

[0094] The actuator is used to execute instructions sent by the engine control unit and / or the vehicle controller, such as receiving a first alarm message, a second alarm message and / or a third alarm message, and providing a prompt.

[0095] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0096] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An oil pressure monitoring method, applied to a vehicle controller, characterized in that, The method includes: The engine control unit acquires the actual oil pressure value sent by the engine control unit, wherein the engine control unit sends the actual oil pressure value to the vehicle controller when the actual oil pressure value is less than a preset first threshold. Determine whether the actual oil pressure value is less than a preset second threshold and greater than a preset third threshold; When the actual oil pressure value is less than the second threshold and greater than the third threshold, the engine speed is adjusted based on the actual oil pressure value; When the actual oil pressure value is less than the third threshold, a command to stop the engine is issued; Wherein, the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold; The adjustment of engine speed based on the actual oil pressure value includes: Obtain the set speed of the engine; Calculate the difference between the actual oil pressure value and the second threshold; The engine speed correction value is obtained based on the difference between the actual oil pressure value and the second threshold value, and the set engine speed, so as to adjust the engine speed according to the engine speed correction value; The engine speed correction value is obtained by formula 1 based on the difference between the actual oil pressure value and the second threshold and the set engine speed. Formula 1 is: N = N _ S-f(P) _ OM –P _ O) Where N represents the speed correction value, N _ S represents the set rotation speed, P _ OM represents the second threshold, P _ O represents the actual oil pressure value, and f represents the correction factor; Before determining whether the actual oil pressure value is less than a preset first threshold, the process also includes: Obtain the set speed of the engine; Obtain the preset relationship between rotational speed and pressure threshold; The first threshold, the second threshold, and the third threshold are obtained based on the correspondence between the rotational speed and the pressure threshold, and the set rotational speed.

2. The method according to claim 1, characterized in that, Also includes: When the actual oil pressure value is less than the second threshold and greater than the third threshold, a first alarm message is issued. When the actual oil pressure value is less than the third threshold, a second alarm message is issued.

3. The method according to claim 1, characterized in that, The process of obtaining the set speed of the engine includes: Obtain the throttle opening of the engine; Obtain the preset relationship between throttle opening and engine speed; The set engine speed is obtained based on the correspondence between the throttle opening and the engine speed, and the throttle opening.

4. An oil pressure monitoring device, applied to a vehicle controller, characterized in that, The device for implementing the oil pressure monitoring method according to any one of claims 1 to 3 includes: The acquisition module is used to acquire the actual oil pressure value sent by the engine control unit, wherein the engine control unit sends the actual oil pressure value to the vehicle controller when the actual oil pressure value is less than a preset first threshold. The judgment module is used to determine whether the actual oil pressure value is less than a preset second threshold and greater than a preset third threshold. The first processing module is used to adjust the engine speed based on the actual oil pressure value when the actual oil pressure value is less than the second threshold and greater than the third threshold. The second processing module is used to issue a command to stop the engine when the actual oil pressure value is less than the third threshold. Wherein, the first threshold is greater than the second threshold, and the second threshold is greater than the third threshold.

5. A vehicle controller, characterized in that, include: The system includes a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the oil pressure monitoring method of any one of claims 1 to 3.

6. An oil pressure monitoring system, characterized in that, It includes the engine control unit and the vehicle controller as described in claim 5.

7. The oil pressure monitoring system according to claim 6, characterized in that, The engine control unit is also used to issue a third alarm message when the actual oil pressure value is less than the first threshold.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to perform the oil pressure monitoring method according to any one of claims 1 to 3.

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