Method for regulating oil pressure of diesel engine supercharger, controller and diesel engine system

Abstract

The application provides a diesel engine supercharger oil inlet pressure adjusting method, a controller and a diesel engine system. The method comprises the following steps: obtaining the temperature of lubricating oil flowing to the supercharger, the engine speed of the diesel engine, and the oil inlet pressure of the supercharger, to obtain the detected lubricating oil temperature, the detected engine speed and the detected oil inlet pressure; obtaining the target maximum oil inlet pressure of the supercharger corresponding to the detected lubricating oil temperature and the detected engine speed; in the case that the detected oil inlet pressure is greater than or equal to the target maximum oil inlet pressure of the supercharger, and the duration that the detected oil inlet pressure is greater than or equal to the target maximum oil inlet pressure of the supercharger is greater than a first preset duration, a first control instruction is sent to control the control valve to open, so as to reduce the detected oil inlet pressure of the supercharger to a preset oil inlet pressure range. In the case that the detected oil inlet pressure is high, the control valve is controlled to open, so that the lubricating oil flows back to the oil pan through the control valve, and the oil inlet pressure of the supercharger is reduced.

Description

Technical Field

[0001] This application relates to the field of diesel engines, and more specifically, to a method for adjusting the oil inlet pressure of a diesel engine turbocharger, a controller in a diesel engine system, a storage medium, and a diesel engine system. Background Technology

[0002] The turbocharger matched with a large diesel engine requires a high oil inlet pressure. The traditional oil supply method is to take lubricating oil from the main oil passage of the diesel engine. The oil inlet pressure of the turbocharger changes with the main oil passage and cannot be adjusted. Especially when the diesel engine is being lubricated after being stopped, the high pressure of the backup oil pump can easily cause the turbocharger bearing oil seal to fail, resulting in oil leakage, oil coking and other faults, which will reduce the performance and reliability of the turbocharger and affect the normal operation of the diesel engine. Summary of the Invention

[0003] The main objective of this application is to provide a method for adjusting the oil inlet pressure of a diesel engine turbocharger, a controller in a diesel engine system, a storage medium, and a diesel engine system, so as to at least solve the problem that existing solutions cannot achieve precise adjustment of the oil inlet pressure of the diesel engine turbocharger.

[0004] To achieve the above objectives, according to one aspect of this application, a method for adjusting the oil inlet pressure of a diesel engine turbocharger is provided. The diesel engine system includes an oil pan, a turbocharger located above the oil pan, a main lubrication channel, and an oil pump. The oil pump pumps lubricating oil from the oil pan into the main lubrication channel, thereby allowing the lubricating oil to flow from the main lubrication channel to the turbocharger. The diesel engine system further includes a control valve, a first end of which is connected to the connection between the main lubrication channel and the turbocharger, and a second end of which is connected to the oil pan. The control valve includes: obtaining the lubricating oil flowing to the turbocharger... The system obtains the detected lubricating oil temperature, detected engine speed, and detected inlet oil pressure from the temperature, diesel engine speed, and turbocharger inlet oil pressure; it acquires the target maximum inlet oil pressure of the turbocharger corresponding to the detected lubricating oil temperature and the detected engine speed; when the detected inlet oil pressure is greater than or equal to the target maximum inlet oil pressure of the turbocharger, and the duration of the detected inlet oil pressure being greater than or equal to the target maximum inlet oil pressure of the turbocharger is greater than a first preset duration, it sends a first control command to control the control valve to open, so as to reduce the detected inlet oil pressure of the turbocharger to a preset inlet oil pressure range.

[0005] Optionally, obtaining the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and the detected engine speed includes: obtaining a first mapping relationship between the lubricating oil temperature, engine speed and turbocharger maximum inlet pressure; and determining the target turbocharger maximum inlet pressure based on the first mapping relationship, the detected lubricating oil temperature and the detected engine speed.

[0006] Optionally, the method further includes: after sending the first control command to control the control valve to open for a second preset time, acquiring the detected oil inlet pressure again; if the detected oil inlet pressure is greater than or equal to the target turbocharger alarm oil inlet pressure, and the duration of the detected oil inlet pressure being greater than or equal to the target turbocharger alarm oil inlet pressure is greater than the first preset time, determining that the control valve opening has failed.

[0007] Optionally, the method further includes: obtaining a second mapping relationship between lubricating oil temperature, engine speed and turbocharger alarm inlet pressure; and determining the target turbocharger alarm inlet pressure based on the mapping relationship, the detected lubricating oil temperature and the detected engine speed.

[0008] Optionally, after determining that the control valve failed to open, the method further includes: generating a failure message and sharing the failure message to a display terminal, wherein the failure message indicates that the control valve failed to open.

[0009] Optionally, after reducing the detected inlet pressure of the booster to a preset inlet pressure range, the method further includes: sending a second control command to control the control valve to close.

[0010] Optionally, the method further includes: when the detected inlet pressure is less than the minimum value of the preset inlet pressure range, increasing the rotational speed of the lubricating oil pump to increase the detected inlet pressure to within the preset inlet pressure range.

[0011] According to another aspect of this application, a controller is provided in a diesel engine system. The diesel engine system further includes an oil pan, a turbocharger located above the oil pan, a main lubrication channel, and an oil pump. The oil pump pumps lubricating oil from the oil pan into the main lubrication channel, thereby allowing the lubricating oil to flow from the main lubrication channel to the turbocharger. The diesel engine system also includes a control valve. A first end of the control valve is connected to a connection between the main lubrication channel and the turbocharger, and a second end of the control valve is connected to the oil pan. The controller includes a first acquisition unit for acquiring the temperature of the lubricating oil flowing to the turbocharger and the engine temperature of the diesel engine. The engine speed and the turbocharger's inlet pressure are used to obtain the detected lubricating oil temperature, the detected engine speed, and the detected inlet pressure; a second acquisition unit is used to acquire the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and the detected engine speed; an adjustment unit is used to send a first control command to control the control valve to open, so as to reduce the detected inlet pressure of the turbocharger to a preset inlet pressure range, when the detected inlet pressure is greater than or equal to the target turbocharger maximum inlet pressure and the duration of the detected inlet pressure being greater than or equal to the target turbocharger maximum inlet pressure is greater than a first preset duration.

[0012] According to another aspect of this application, a computer-readable storage medium is provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform any of the described methods for adjusting the oil inlet pressure of a diesel engine turbocharger.

[0013] According to another aspect of this application, a diesel engine system is provided, comprising: a controller for executing any of the methods for regulating the oil inlet pressure of the diesel engine turbocharger; an oil pan, a turbocharger located above the oil pan, a main lubrication channel, and an oil pump, the oil pump pumping lubricating oil from the oil pan into the main lubrication channel, thereby the lubricating oil flowing from the main lubrication channel to the turbocharger; and a control valve electrically connected to the controller, a first end of the control valve communicating with the connection between the main lubrication channel and the turbocharger, and a second end of the control valve communicating with the oil pan.

[0014] By applying the technical solution of this application, the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the inlet pressure of the turbocharger are obtained to detect the lubricating oil temperature, the engine speed, and the inlet pressure. The target maximum inlet pressure of the turbocharger corresponding to the detected lubricating oil temperature and the detected engine speed is obtained. When the detected inlet pressure is greater than or equal to the target maximum inlet pressure of the turbocharger, and the duration of the detected inlet pressure being greater than or equal to the target maximum inlet pressure of the turbocharger is greater than a first preset duration, a first control command is sent to control the control valve to open, thereby reducing the detected inlet pressure of the turbocharger to a preset inlet pressure range. When the detected inlet pressure is high, the control valve is opened to allow the lubricating oil to flow back to the oil pan through the control valve (i.e., through pressure relief), reducing the turbocharger inlet pressure. This achieves turbocharger inlet pressure control for the diesel engine at different speeds and under different operating conditions. Attached Figure Description

[0015] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0016] Figure 1 A hardware block diagram of a mobile terminal for performing a method for adjusting the inlet oil pressure of a diesel engine turbocharger, according to an embodiment of this application, is shown.

[0017] Figure 2 A schematic flowchart of a method for adjusting the oil inlet pressure of a diesel engine turbocharger according to an embodiment of this application is shown.

[0018] Figure 3 A structural diagram of a diesel engine system according to an embodiment of this application is shown;

[0019] Figure 4 A flowchart illustrating a specific method for determining a target turbocharger alarm inlet pressure according to an embodiment of this application is shown;

[0020] Figure 5 A flowchart illustrating a specific method for adjusting the inlet oil pressure of a diesel engine turbocharger according to an embodiment of this application is shown.

[0021] Figure 6 A structural block diagram of a controller in a diesel engine system according to an embodiment of this application is shown;

[0022] The above figures include the following reference numerals:

[0023] 01. Oil pan; 02. Turbocharger; 03. Main lubrication channel; 04. Oil pump; 05. Control valve; 06. Standby pump; 07. Controller. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] As described in the background section, existing solutions cannot accurately adjust the inlet pressure of a diesel engine turbocharger, especially for higher turbocharger inlet pressures. To address this issue, embodiments of this application provide a method for adjusting the inlet pressure of a diesel engine turbocharger, a controller in a diesel engine system, a storage medium, and a diesel engine system.

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0029] The methods and embodiments provided in this application can be executed on a mobile terminal, computer terminal, or similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for a method of adjusting the oil inlet pressure of a diesel engine turbocharger according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0030] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the diesel engine turbocharger inlet pressure adjustment method in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0031] This embodiment provides a method for adjusting the oil inlet pressure of a diesel engine turbocharger that runs on a mobile terminal, computer terminal, or similar computing device. 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. Also, 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.

[0032] Figure 2 This is a flowchart of a method for adjusting the oil inlet pressure of a diesel engine turbocharger according to an embodiment of this application. Figure 3A structural diagram of a diesel engine system according to an embodiment of this application is shown. Figure 3 The diesel engine system includes an oil pan 01, a turbocharger 02 located above the oil pan 01, a main lubrication channel 03, and an oil pump 04. The oil pump 04 pumps lubricating oil from the oil pan 01 into the main lubrication channel 03, thereby allowing lubricating oil to flow from the main lubrication channel 03 to the turbocharger 02. The system is characterized by further including a control valve 05. The first end of the control valve 05 is connected to the connection between the main lubrication channel 03 and the turbocharger 02, and the second end of the control valve 05 is connected to the oil pan 01. Figure 2 As shown, the method for adjusting the oil inlet pressure of a diesel engine turbocharger includes:

[0033] Step S201: Obtain the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the oil inlet pressure of the turbocharger to obtain the detected lubricating oil temperature, detected engine speed, and detected oil inlet pressure;

[0034] The temperature of the lubricating oil is detected using a temperature sensor installed at the temperature detection location. Figure 3 In Chinese, T represents this.

[0035] The inlet oil pressure of the turbocharger is detected by a pressure sensor installed at the pressure detection location. Figure 3 In this context, P is used to represent it.

[0036] Step S202: Obtain the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and detected engine speed;

[0037] That is, the target turbocharger's maximum inlet pressure changes with the detected lubricating oil temperature and the detected engine speed. In other words, the detected lubricating oil temperature and the detected engine speed together determine the corresponding target turbocharger's maximum inlet pressure.

[0038] Step S203: When the detected oil inlet pressure is greater than or equal to the target turbocharger's maximum oil inlet pressure, and the duration of the detected oil inlet pressure being greater than or equal to the target turbocharger's maximum oil inlet pressure is greater than a first preset duration, a first control command is sent to control the control valve to open, so as to reduce the detected oil inlet pressure of the turbocharger to the preset oil inlet pressure range.

[0039] The first control command is the control valve opening command;

[0040] The first preset duration is set to 3s, 5s, 7s, etc.; the purpose of setting the first preset duration is to prevent misjudgment due to instantaneous fluctuations in pressure.

[0041] The preset inlet pressure range is the range of inlet pressure that ensures the turbocharger operates normally, neither too high nor too low. It is related to the structural characteristics of the turbocharger.

[0042] In other words, if the detected inlet oil pressure is greater than or equal to the target turbocharger's maximum inlet oil pressure, and the duration meets the time requirement, it is determined that the turbocharger's inlet oil pressure is too high and needs to be reduced. Therefore, the control valve is opened to allow the lubricating oil to flow back to the oil pan through the control valve, thereby reducing the turbocharger's inlet oil pressure.

[0043] It also includes: keeping the control valve closed when the detected inlet oil pressure is less than the target turbocharger's maximum inlet oil pressure.

[0044] The method for adjusting the inlet oil pressure of a diesel engine turbocharger disclosed in this application obtains the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the inlet oil pressure of the turbocharger to obtain the detected lubricating oil temperature, detected engine speed, and detected inlet oil pressure; obtains the target maximum inlet oil pressure of the turbocharger corresponding to the detected lubricating oil temperature and detected engine speed; when the detected inlet oil pressure is greater than or equal to the target maximum inlet oil pressure of the turbocharger, and the duration of the detected inlet oil pressure being greater than or equal to the target maximum inlet oil pressure of the turbocharger is greater than a first preset duration, a first control command is sent to control the control valve to open, so as to reduce the detected inlet oil pressure of the turbocharger to a preset inlet oil pressure range. When the detected inlet oil pressure is high, the control valve is opened to allow the lubricating oil to flow back to the oil pan through the control valve (i.e., through pressure relief), thereby reducing the turbocharger inlet oil pressure. This achieves turbocharger inlet pressure control of the diesel engine at different speeds and under different operating conditions.

[0045] In addition, the method for adjusting the turbocharger inlet pressure of the diesel engine in this application is applicable to the adjustment of turbocharger inlet pressure under different operating conditions of the diesel engine.

[0046] In addition, the method for adjusting the oil inlet pressure of the diesel engine turbocharger in this application has the advantages of simple logic and easy implementation; the diesel engine system in this application has the advantages of simple architecture and easy design.

[0047] Specifically, such as Figure 4 As shown, step S202, obtaining the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and detected engine speed, includes:

[0048] Step S2021: Obtain the first mapping relationship between lubricating oil temperature, engine speed and turbocharger maximum inlet pressure;

[0049] The first mapping relationship can be represented by the first MAP table, where the X1 variable of the first MAP table is the lubricating oil temperature, the X2 variable of the first MAP table is the engine speed, and the Y variable of the first MAP table is the turbocharger's maximum inlet oil pressure.

[0050] Specifically, the engine speed is 0 when the engine is parked, and the engine speed is greater than 0 when the engine is running.

[0051] Step S2022: Determine the target turbocharger maximum inlet pressure based on the first mapping relationship, the detected lubricating oil temperature, and the detected engine speed.

[0052] In other words, by obtaining a correspondence between lubricating oil temperature, engine speed, and the maximum inlet pressure of the turbocharger in advance, and then substituting the real-time detected lubricating oil temperature and detected engine speed into this correspondence, the maximum inlet pressure of the target turbocharger can be determined.

[0053] Furthermore, the method also includes:

[0054] After sending the first control command to open the control valve for a second preset time, the oil inlet pressure is detected again.

[0055] The second preset duration can be set to 30s, 45s, 60s, etc.

[0056] If the detected inlet oil pressure is greater than or equal to the target booster alarm inlet oil pressure, and the duration of the detected inlet oil pressure being greater than or equal to the target booster alarm inlet oil pressure is greater than the first preset duration, it is determined that the control valve has failed to open.

[0057] In this case, the target turbocharger alarm inlet pressure is higher than the target turbocharger's maximum inlet pressure. This means that after sending the control command to open the control valve, the turbocharger's inlet pressure rises instead of falling after a period of time, confirming that the control valve opening has failed. This failure is most likely due to mechanical jamming, indicating a mechanical fault.

[0058] Specifically, the methods also include:

[0059] Obtain the second mapping relationship between lubricating oil temperature, engine speed, and turbocharger alarm inlet pressure;

[0060] The target turbocharger alarm inlet pressure is determined based on the mapping relationship, the detection of lubricating oil temperature, and the detection of engine speed.

[0061] The second mapping relationship can be represented by the second MAP table. The X1 variable of the second MAP table is the lubricating oil temperature, the X2 variable of the second MAP table is the engine speed, and the Y variable of the second MAP table is the turbocharger alarm inlet pressure.

[0062] In other words, by obtaining a correspondence between lubricating oil temperature, engine speed, and turbocharger alarm inlet pressure in advance, and then substituting the real-time detected lubricating oil temperature and engine speed into this correspondence, the target turbocharger alarm inlet pressure can be determined.

[0063] In embodiments of this application, after determining that the control valve has failed to open, the method further includes:

[0064] A failure message is generated and shared to the display terminal. The failure message indicates that the control valve failed to open. This message prompts operators to take timely action, such as checking for mechanical faults in the booster.

[0065] In embodiments of this application, after reducing the detected inlet pressure of the booster to a preset inlet pressure range, the method further includes: sending a second control command to control the control valve to close. That is, closing the control valve after the pressure requirement is met.

[0066] In embodiments of this application, the method further includes:

[0067] If the detected inlet oil pressure is lower than the minimum value of the preset inlet oil pressure range, the speed of the lubricating oil pump is increased to raise the detected inlet oil pressure to within the preset inlet oil pressure range. In other words, if the turbocharger inlet oil pressure is too low, the inlet oil pressure can be increased to meet lubrication requirements.

[0068] To enable those skilled in the art to better understand the technical solution of this application, the implementation process of the method for adjusting the oil inlet pressure of the diesel engine turbocharger of this application will be described in detail below with reference to specific embodiments.

[0069] This embodiment relates to a specific method for adjusting the oil inlet pressure of a diesel engine turbocharger, such as... Figure 5 As shown, it includes the following steps:

[0070] Step S1: Begin;

[0071] Step S2: Power on the control system. Here, the system refers to the diesel engine control system. The diesel engine control system is a control unit responsible for controlling the detection of diesel engine parameters, fault handling, etc., including the controller in the diesel engine system mentioned above, as well as pressure sensors, temperature sensors, etc.

[0072] Step S3: Determine whether P≥P1 is true. P represents the detected oil inlet pressure, and P1 represents the target turbocharger maximum oil inlet pressure. If yes, proceed to step S4; otherwise, proceed to step S7.

[0073] Step S4: Open the control valve;

[0074] Step S5: Determine whether P≥P2 is true. P represents the detected oil inlet pressure, and P2 represents the target turbocharger alarm oil inlet pressure. If yes, proceed to step S6; otherwise, proceed to step S7.

[0075] Step S6: Determine that the control valve failed to open.

[0076] Step S7: End.

[0077] This application also provides a controller in a diesel engine system. It should be noted that the controller in the diesel engine system of this application can be used to execute the method for regulating the inlet pressure of a diesel engine turbocharger provided in this application. This device is used to implement 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.

[0078] The controller in the diesel engine system provided in the embodiments of this application will be described below.

[0079] Figure 6 This is a schematic diagram of a controller in a diesel engine system according to an embodiment of this application. The structure of the diesel engine system is as follows: Figure 3 As shown, Figure 3 The diesel engine system includes an oil pan 01, a turbocharger 02 located above the oil pan 01, a main lubrication channel 03, and an oil pump 04. The oil pump 04 pumps lubricating oil from the oil pan 01 into the main lubrication channel 03, thereby allowing lubricating oil to flow from the main lubrication channel 03 to the turbocharger 02. The system is characterized by further including a control valve 05. The first end of the control valve 05 is connected to the connection between the main lubrication channel 03 and the turbocharger 02, and the second end of the control valve 05 is connected to the oil pan 01. Figure 6 As shown, the controller in the diesel engine system includes:

[0080] The first acquisition unit 61 is used to acquire the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the oil inlet pressure of the turbocharger, so as to obtain the detected lubricating oil temperature, the detected engine speed, and the detected oil inlet pressure.

[0081] The second acquisition unit 62 is used to acquire the target turbocharger maximum oil inlet pressure corresponding to the detection of lubricating oil temperature and engine speed.

[0082] The regulating unit 63 is used to send a first control command to control the control valve to open when the detected oil inlet pressure is greater than or equal to the target turbocharger's maximum oil inlet pressure and the duration of the detected oil inlet pressure being greater than or equal to the target turbocharger's maximum oil inlet pressure is greater than a first preset duration, so as to reduce the detected oil inlet pressure of the turbocharger to the preset oil inlet pressure range.

[0083] The controller in the diesel engine system of this application acquires the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the inlet pressure of the turbocharger through a first acquisition unit, thereby obtaining the detected lubricating oil temperature, detected engine speed, and detected inlet pressure. A second acquisition unit acquires the target maximum inlet pressure of the turbocharger corresponding to the detected lubricating oil temperature and detected engine speed. When the detected inlet pressure is greater than or equal to the target maximum inlet pressure of the turbocharger, and the duration of the detected inlet pressure being greater than or equal to the target maximum inlet pressure of the turbocharger is greater than a first preset duration, the regulating unit sends a first control command to control the control valve to open, thereby reducing the detected inlet pressure of the turbocharger to a preset inlet pressure range. When the detected inlet pressure is high, the control valve is opened to allow the lubricating oil to flow back to the oil pan through the control valve, reducing the turbocharger inlet pressure.

[0084] In an optional embodiment of this application, the second acquisition unit includes an acquisition module and a determination module. The acquisition module is used to acquire a first mapping relationship between lubricating oil temperature, engine speed, and the maximum inlet pressure of the turbocharger. The determination module is used to determine the target maximum inlet pressure of the turbocharger based on the first mapping relationship, the detected lubricating oil temperature, and the detected engine speed. In other words, by acquiring a correspondence between lubricating oil temperature, engine speed, and the maximum inlet pressure of the turbocharger in advance, and then substituting the real-time detected lubricating oil temperature and engine speed into this correspondence, the target maximum inlet pressure of the turbocharger can be determined.

[0085] In an optional embodiment of this application, the controller further includes a first sending unit and a first determining unit. The first sending unit is used to send a first control command to control the control valve to open for a second preset time, and then acquire the detected inlet oil pressure again. The first determining unit is used to determine that the control valve opening has failed if the detected inlet oil pressure is greater than or equal to the target turbocharger alarm inlet oil pressure, and the duration of the detected inlet oil pressure being greater than or equal to the target turbocharger alarm inlet oil pressure is greater than the first preset time. Specifically, the target turbocharger alarm inlet oil pressure is greater than the target turbocharger's maximum inlet oil pressure; that is, after sending the control command to open the control valve, the turbocharger's inlet pressure rises instead of falling after a period of time, thus determining that the control valve opening has failed. The opening failure is most likely due to mechanical jamming, i.e., a mechanical fault exists.

[0086] In an optional embodiment of this application, the controller further includes a third acquisition unit and a second determination unit. The third acquisition unit is used to acquire a second mapping relationship between lubricating oil temperature, engine speed, and turbocharger alarm inlet pressure. The second determination unit is used to determine the target turbocharger alarm inlet pressure based on the mapping relationship, the detected lubricating oil temperature, and the detected engine speed. In other words, a correspondence between lubricating oil temperature, engine speed, and turbocharger alarm inlet pressure is acquired in advance, and then the real-time detected lubricating oil temperature and detected engine speed are substituted into this correspondence to determine the target turbocharger alarm inlet pressure.

[0087] In an optional embodiment of this application, the controller further includes a generation unit. This unit generates a failure message after determining that the control valve has failed to open, and shares the failure message with a display terminal. The failure message indicates that the control valve has failed to open. The failure message prompts the operator to take timely countermeasures, such as detecting mechanical faults in the booster.

[0088] In an optional embodiment of this application, the controller further includes a second sending unit, which is used to send a second control command to control the control valve to close after the detected inlet pressure of the booster has been reduced to a preset inlet pressure range. That is, the control valve is closed after the pressure requirement is met.

[0089] In an optional embodiment of this application, the controller further includes a control unit. The control unit is used to increase the speed of the lubricating oil pump to increase the detected inlet oil pressure to within the preset inlet oil pressure range when the detected inlet oil pressure is less than the minimum value of the preset inlet oil pressure range. That is, if the turbocharger inlet oil pressure is too low, the inlet oil pressure can be increased to meet lubrication requirements.

[0090] The controller in the diesel engine system includes a processor and a memory. The first acquisition unit, the second acquisition unit, and the adjustment unit mentioned above are all stored as program units in the memory. The processor executes the program units stored in the memory to achieve the corresponding functions. All of the above modules are located in the same processor; or, the above modules are located in different processors in any combination.

[0091] The processor contains a core, which retrieves the corresponding program unit from memory. One or more cores can be configured, and precise adjustment of the turbocharger's inlet pressure can be achieved by modifying the core parameters.

[0092] The memory may include non-permanent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip.

[0093] This invention provides a diesel engine system, such as... Figure 3 As shown, it includes:

[0094] Controller 07 is used to execute any one of the methods for adjusting the oil inlet pressure of the diesel engine turbocharger;

[0095] Oil pan 01, turbocharger 02 located above oil pan 01, main lubrication channel 03, lubricating oil pump 04. The lubricating oil pump 04 pumps the lubricating oil in oil pan 01 into main lubrication channel 03, so that the lubricating oil flows from main lubrication channel 03 to turbocharger 02.

[0096] Control valve 05 is electrically connected to controller 07. The first end of control valve 05 is connected to the connection between main lubrication channel 03 and booster 02, and the second end of control valve 05 is connected to oil pan 01.

[0097] The diesel engine system also includes a backup pump 06.

[0098] This invention provides a computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform a method for adjusting the oil inlet pressure of a diesel engine turbocharger.

[0099] Specifically, the methods for adjusting the oil inlet pressure of a diesel engine turbocharger include:

[0100] Step S201: Obtain the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the oil inlet pressure of the turbocharger to obtain the detected lubricating oil temperature, detected engine speed, and detected oil inlet pressure;

[0101] Step S202: Obtain the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and detected engine speed;

[0102] Step S203: When the detected oil inlet pressure is greater than or equal to the target turbocharger's maximum oil inlet pressure, and the duration of the detected oil inlet pressure being greater than or equal to the target turbocharger's maximum oil inlet pressure is greater than a first preset duration, a first control command is sent to control the control valve to open, so as to reduce the detected oil inlet pressure of the turbocharger to the preset oil inlet pressure range.

[0103] This invention provides a processor for running a program, wherein the program executes a method for adjusting the oil inlet pressure of a diesel engine turbocharger.

[0104] Specifically, the methods for adjusting the oil inlet pressure of a diesel engine turbocharger include:

[0105] Step S201: Obtain the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the oil inlet pressure of the turbocharger to obtain the detected lubricating oil temperature, detected engine speed, and detected oil inlet pressure;

[0106] Step S202: Obtain the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and detected engine speed;

[0107] Step S203: When the detected oil inlet pressure is greater than or equal to the target turbocharger's maximum oil inlet pressure, and the duration of the detected oil inlet pressure being greater than or equal to the target turbocharger's maximum oil inlet pressure is greater than a first preset duration, a first control command is sent to control the control valve to open, so as to reduce the detected oil inlet pressure of the turbocharger to the preset oil inlet pressure range.

[0108] This invention provides a device including a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, it performs at least the following steps:

[0109] Step S201: Obtain the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the oil inlet pressure of the turbocharger to obtain the detected lubricating oil temperature, detected engine speed, and detected oil inlet pressure;

[0110] Step S202: Obtain the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and detected engine speed;

[0111] Step S203: When the detected oil inlet pressure is greater than or equal to the target turbocharger's maximum oil inlet pressure, and the duration of the detected oil inlet pressure being greater than or equal to the target turbocharger's maximum oil inlet pressure is greater than a first preset duration, a first control command is sent to control the control valve to open, so as to reduce the detected oil inlet pressure of the turbocharger to the preset oil inlet pressure range.

[0112] The devices mentioned in this article can be servers, PCs, tablets, mobile phones, etc.

[0113] This application also provides a computer program product, which, when executed on a data processing device, is suitable for executing an initialization program having at least the following method steps:

[0114] Step S201: Obtain the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the oil inlet pressure of the turbocharger to obtain the detected lubricating oil temperature, detected engine speed, and detected oil inlet pressure;

[0115] Step S202: Obtain the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and detected engine speed;

[0116] Step S203: When the detected oil inlet pressure is greater than or equal to the target turbocharger's maximum oil inlet pressure, and the duration of the detected oil inlet pressure being greater than or equal to the target turbocharger's maximum oil inlet pressure is greater than a first preset duration, a first control command is sent to control the control valve to open, so as to reduce the detected oil inlet pressure of the turbocharger to the preset oil inlet pressure range.

[0117] It is obvious to those skilled in the art that the modules or steps of the present invention described above can be implemented using general-purpose computing devices. They can be centralized on a single computing device or distributed across a network of multiple computing devices. They can be implemented using computer-executable program code, and thus can be stored in a storage device for execution by a computing device. In some cases, the steps shown or described can be performed in a different order than those described herein, or they can be fabricated as separate integrated circuit modules, or multiple modules or steps can be fabricated as a single integrated circuit module. Thus, the present invention is not limited to any particular combination of hardware and software.

[0118] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0119] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0120] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1The function specified in one or more boxes.

[0121] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0122] In a typical configuration, a computing device includes one or more processors (CPU), input / output interfaces, network interfaces, and memory.

[0123] Memory may include non-persistent memory in computer-readable media, such as random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash RAM. Memory is an example of computer-readable media.

[0124] Computer-readable media includes both permanent and non-permanent, removable and non-removable media that can store information using any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transferable medium that can be used to store information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals and carrier waves.

[0125] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0126] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0127] 1) The method for adjusting the inlet oil pressure of a diesel engine turbocharger according to this application obtains the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the inlet oil pressure of the turbocharger to obtain the detected lubricating oil temperature, the detected engine speed, and the detected inlet oil pressure; obtains the target maximum inlet oil pressure of the turbocharger corresponding to the detected lubricating oil temperature and the detected engine speed; when the detected inlet oil pressure is greater than or equal to the target maximum inlet oil pressure of the turbocharger, and the duration of the detected inlet oil pressure being greater than or equal to the target maximum inlet oil pressure of the turbocharger is greater than a first preset duration, a first control command is sent to control the control valve to open, so as to reduce the detected inlet oil pressure of the turbocharger to a preset inlet oil pressure range. When the detected inlet oil pressure is high, the control valve is opened to allow the lubricating oil to flow back to the oil pan through the control valve, thereby reducing the turbocharger inlet oil pressure.

[0128] 2) The controller in the diesel engine system of this application acquires the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the inlet pressure of the turbocharger through a first acquisition unit, thereby obtaining the detected lubricating oil temperature, detected engine speed, and detected inlet pressure; a second acquisition unit acquires the target maximum inlet pressure of the turbocharger corresponding to the detected lubricating oil temperature and detected engine speed; when the detected inlet pressure is greater than or equal to the target maximum inlet pressure of the turbocharger, and the duration of the detected inlet pressure being greater than or equal to the target maximum inlet pressure of the turbocharger is greater than a first preset duration, the adjustment unit sends a first control command to control the control valve to open, so as to reduce the detected inlet pressure of the turbocharger to a preset inlet pressure range. When the detected inlet pressure is high, the control valve is opened so that the lubricating oil flows back to the oil pan through the control valve, thereby reducing the turbocharger inlet pressure.

[0129] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for adjusting the inlet oil pressure of a diesel engine turbocharger, the diesel engine system comprising an oil pan, a turbocharger located above the oil pan, a main lubrication channel, and an oil pump, wherein the oil pump pumps lubricating oil from the oil pan into the main lubrication channel, thereby the lubricating oil flowing from the main lubrication channel to the turbocharger, characterized in that, The diesel engine system further includes a control valve, a first end of which is connected to the connection between the main lubrication passage and the turbocharger, and a second end of which is connected to the oil pan, including: The temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the oil inlet pressure of the turbocharger are obtained to obtain the detected lubricating oil temperature, detected engine speed, and detected oil inlet pressure; Obtain the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and the detected engine speed; If the detected inlet pressure is greater than or equal to the target turbocharger's maximum inlet pressure, and the duration of the detected inlet pressure being greater than or equal to the target turbocharger's maximum inlet pressure is greater than a first preset duration, a first control command is sent to control the control valve to open, so as to reduce the detected inlet pressure of the turbocharger to a preset inlet pressure range. The preset inlet pressure range is an inlet pressure range related to the structural characteristics of the turbocharger to ensure the normal operation of the turbocharger. The process of obtaining the target turbocharger maximum inlet pressure corresponding to the detected lubricating oil temperature and the detected engine speed includes: Obtain a first mapping relationship between lubricating oil temperature, engine speed, and turbocharger maximum inlet pressure; determine the target turbocharger maximum inlet pressure based on the first mapping relationship, the detected lubricating oil temperature, and the detected engine speed. The method further includes: If the detected inlet pressure is less than the minimum value of the preset inlet pressure range, the rotational speed of the lubricating oil pump is increased to increase the detected inlet pressure to within the preset inlet pressure range.

2. The method according to claim 1, characterized in that, The method further includes: After sending the first control command to control the control valve to open for a second preset time, the detection oil inlet pressure is obtained again; If the detected inlet pressure is greater than or equal to the target turbocharger alarm inlet pressure, and the duration of the detected inlet pressure being greater than or equal to the target turbocharger alarm inlet pressure is greater than the first preset duration, it is determined that the control valve has failed to open.

3. The method according to claim 2, characterized in that, The method further includes: Obtain the second mapping relationship between lubricating oil temperature, engine speed, and turbocharger alarm inlet pressure; The target turbocharger alarm inlet pressure is determined based on the second mapping relationship, the detected lubricating oil temperature, and the detected engine speed.

4. The method according to claim 2, characterized in that, After determining that the control valve has failed to open, the method further includes: A failure message is generated and shared to a display terminal, wherein the failure message indicates that the control valve failed to open.

5. The method according to claim 1, characterized in that, After reducing the detected inlet pressure of the turbocharger to a preset inlet pressure range, the method further includes: Send a second control command to close the control valve.

6. A controller in a diesel engine system, used to execute the method for adjusting the inlet oil pressure of a diesel engine turbocharger as described in any one of claims 1 to 5, comprising: The first acquisition unit is used to acquire the temperature of the lubricating oil flowing to the turbocharger, the engine speed of the diesel engine, and the oil inlet pressure of the turbocharger, so as to obtain the detected lubricating oil temperature, the detected engine speed, and the detected oil inlet pressure; The second acquisition unit is used to acquire the target turbocharger maximum oil inlet pressure corresponding to the detected lubricating oil temperature and the detected engine speed. The regulating unit is configured to send a first control command to control the control valve to open when the detected oil inlet pressure is greater than or equal to the target turbocharger's maximum oil inlet pressure, and the duration of the detected oil inlet pressure being greater than or equal to the target turbocharger's maximum oil inlet pressure is greater than a first preset duration, so as to reduce the detected oil inlet pressure of the turbocharger to a preset oil inlet pressure range.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the computer-readable storage medium to perform the method for adjusting the oil inlet pressure of a diesel engine turbocharger as described in any one of claims 1 to 5.

8. A diesel engine system, characterized in that, include: A controller for performing the method for adjusting the oil inlet pressure of a diesel engine turbocharger as described in any one of claims 1 to 5; An oil pan, a turbocharger located above the oil pan, a main lubrication channel, and an oil pump, wherein the oil pump pumps the lubricating oil in the oil pan into the main lubrication channel, so that the lubricating oil flows from the main lubrication channel to the turbocharger; A control valve is electrically connected to the controller. The first end of the control valve is connected to the connection between the main lubrication channel and the turbocharger, and the second end of the control valve is connected to the oil pan.

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