Control method, system and electronic equipment for engine dual-circuit lubrication system

Abstract

The present application provides a control method, system, and electronic device for an engine dual-circuit lubrication system, relating to the field of vehicle engine technology. The method comprises: obtaining the main bearing lubricating oil temperature; determining whether the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit; if the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit, obtaining the lubricating oil temperature of the main oil gallery; determining the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil gallery; determining whether the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil gallery exceeds the maximum temperature difference limit; if the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil gallery exceeds the maximum temperature difference limit, controlling the main bearing to cool down. The method solves the problem of insufficient main bearing oil flow, increased oil temperature, and decreased viscosity in a dual-circuit lubrication system, which leads to wear of the main bearing and inability to ensure reliable operation of the main bearing.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle engines, and in particular to a control method, system and electronic equipment for a dual-circuit lubrication system of an engine. Background Art

[0002] Lubricating oil is a liquid or semi-solid lubricant used in various types of automobiles and mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the role of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering.

[0003] As engine thermal efficiency continues to improve, higher requirements are placed on engine lubrication systems. Specifically, the system's lubricating oil pressure should be as consistent as possible with the required lubricating oil pressure. This ensures reliability while reducing oil consumption and avoids oil pump power loss caused by excessive oil pressure. However, in engine lubrication systems, various bearings, gears, and accessories are connected in parallel between the main oil gallery and the oil pan. The oil pressure requirements of each component vary. To ensure reliable operation of all components, the maximum oil pressure required by each component determines the target pressure in the main oil gallery. Consequently, for some components with low pressure requirements, the lubricating oil pressure and flow rate are excessive. Dual-circuit lubrication systems exist in the prior art, but these systems typically separate the main bearings and piston cooling nozzles for oil supply. When the main oil gallery pressure does not exceed the limit, the components with the highest lubricating oil flow in the engine lubrication system, namely the main bearings and piston cooling nozzles, are separated. This still results in excessive lubricating oil pressure and flow for some components with low pressure requirements. Therefore, improvements to the prior art dual-circuit lubrication systems are still needed.

[0004] In addition, in the dual-circuit lubrication system, the preset value of the oil target pressure of the main bearing branch may deviate, resulting in insufficient main bearing oil flow, increased oil temperature and decreased viscosity, which in turn causes main bearing wear and cannot ensure reliable operation of the main bearing. Summary of the Invention

[0005] The present application provides a control method, system and electronic equipment for an engine dual-circuit lubrication system to at least solve the technical problems existing in the related art.

[0006] According to one aspect of an embodiment of the present application, a control method for an engine dual-circuit lubrication system is provided, wherein the engine dual-circuit lubrication system includes a first lubrication circuit and a second lubrication circuit, the first lubrication circuit includes a main oil channel and an electronically controlled oil pump, and the second lubrication circuit includes a mechanical oil pump; the first lubrication circuit is used to lubricate the main bearing and the piston cooling nozzle; the control method for the engine dual-circuit lubrication system includes: obtaining the main bearing lubricating oil temperature; judging whether the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit; if the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit, obtaining the lubricating oil temperature of the main oil channel; determining the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel; judging whether the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel exceeds the maximum temperature difference limit; if the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel exceeds the maximum temperature difference limit, controlling the main bearing to cool down.

[0007] As an optional implementation manner, if the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel does not exceed a maximum temperature difference limit, the main bearing load is reduced.

[0008] As an optional embodiment, the first lubrication circuit also includes a main bearing control valve, which is arranged between the main oil channel and the main bearing. If the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel exceeds the maximum temperature difference limit, controlling the main bearing to cool down includes: obtaining a first preset target pressure value of the main bearing front pressure; and increasing the first preset target pressure value of the main bearing front pressure according to the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel.

[0009] As an optional embodiment, the first lubrication circuit also includes a nozzle control valve, which is arranged between the main oil channel and the piston cooling nozzle; obtaining the first preset target pressure value of the main bearing front pressure includes: obtaining the engine speed and the throttle opening; confirming the first preset target pressure value of the main bearing front pressure and the nozzle preset target pressure value of the piston cooling nozzle front pressure based on the engine speed and the throttle opening.

[0010] As an optional embodiment, the control method also includes: determining the relationship between the first preset target pressure value and the nozzle preset target pressure value; if the first preset target pressure value is greater than the nozzle preset target pressure value, controlling the main bearing control valve to fully open, controlling the opening of the nozzle control valve according to the nozzle preset target pressure value, and adjusting the speed of the electronically controlled oil pump until the main bearing control valve reaches the first preset target pressure value and the nozzle control valve reaches the nozzle preset target pressure value.

[0011] As an optional embodiment, the control method also includes: if the first preset target pressure value is less than the nozzle preset target pressure value, controlling the nozzle control valve to be fully opened, controlling the opening of the main bearing control valve according to the first preset target pressure value, and adjusting the speed of the electronically controlled oil pump until the main bearing control valve reaches the first preset target pressure value and the nozzle control valve reaches the nozzle preset target pressure value.

[0012] As an optional implementation, the control method further includes: determining whether the engine speed is 0; if the engine speed is 0, controlling the main bearing control valve and the nozzle control valve to be closed.

[0013] According to another aspect of an embodiment of the present application, an engine dual-circuit lubrication system is also provided, comprising a first lubrication circuit and a second lubrication circuit, wherein the first lubrication circuit comprises a main oil channel for lubricating a main bearing and a piston cooling nozzle, and further comprising: an oil temperature acquisition module for acquiring the lubricating oil temperature of the main bearing; a temperature limit judgment module for judging whether the lubricating oil temperature of the main bearing exceeds the maximum temperature limit of the main bearing; a lubricating oil temperature acquisition module for acquiring the lubricating oil temperature of the main oil channel if the lubricating oil temperature of the main bearing exceeds the maximum temperature limit of the main bearing; a temperature difference determination module for determining the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel; a temperature difference limit judgment module for judging whether the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel exceeds the maximum temperature difference limit; and a cooling module for controlling the main bearing to cool down if the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel exceeds the maximum temperature difference limit.

[0014] According to another aspect of an embodiment of the present application, an electronic device is provided, comprising a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus, and the memory is used to store a computer program; and the processor is used to execute the steps of the control method for the engine dual-circuit lubrication system by running the computer program stored in the memory.

[0015] According to another aspect of the embodiment of the present application, a computer-readable storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the control method steps of the engine dual-circuit lubrication system when running.

[0016] In an embodiment of the present application, a control method for an engine dual-circuit lubrication system is provided, wherein the engine dual-circuit lubrication system includes a first lubrication circuit and a second lubrication circuit, wherein the first lubrication circuit includes a main oil channel for lubricating the main bearings and piston cooling nozzles. This arrangement allows the first lubrication circuit to supply oil and lubricate the main bearings and piston cooling nozzles, so that the components with the largest lubricating oil flow, namely the main bearings and piston cooling nozzles, share a lubrication circuit, and allow other components to share the second lubrication circuit, greatly reducing the oil demand of the second lubrication circuit, thereby reducing the amount of lubricating oil used and saving costs. In addition, the present method determines the wear condition of the main bearing by the lubricating oil temperature of the main bearing, thereby solving the technical problem that in a dual-circuit lubrication system, the preset value of the target oil pressure of the main bearing branch may deviate, resulting in insufficient oil flow to the main bearing, increased oil temperature, decreased viscosity, and thus wear of the main bearing, making it impossible to ensure the reliable operation of the main bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] Figure 1 This is a flow chart of an optional control method for a dual-circuit lubrication system of an engine provided in accordance with an embodiment of the present application;

[0020] Figure 2 1 is a schematic structural diagram of an optional dual-circuit lubrication system for an engine according to an embodiment of the present application;

[0021] Figure 3 This is a structural block diagram of an optional electronic device according to an embodiment of the present application. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] The lubricating oil pressure in a lubrication system should be as consistent as possible with the required lubricating oil pressure. This not only reduces oil consumption while ensuring reliability, but also avoids oil pump power loss caused by excessive oil pressure. However, in an engine lubrication system, various bearings, gears, and accessories are connected in parallel between the main oil gallery and the oil pan. The oil pressure requirements of each component are not consistent. To ensure reliable operation of all components, the maximum oil pressure required by each component determines the target pressure of the main oil gallery. Therefore, for certain components with low pressure requirements, the lubricating oil pressure and flow rate are excessive. Dual-circuit lubrication systems exist in the prior art, but these systems all supply oil to the main bearings and piston cooling nozzles separately. When the main oil gallery pressure does not exceed the limit, the components with the largest lubricating oil flow in the engine lubrication system, namely the main bearings and piston cooling nozzles, are separated. This still results in excessive lubricating oil pressure and flow rate for certain components with low pressure requirements. Therefore, the dual-circuit lubrication systems in the prior art still need to be improved. In addition, in the dual-circuit lubrication system, the preset value of the oil target pressure of the main bearing branch may deviate, resulting in insufficient main bearing oil flow, increased oil temperature and decreased viscosity, which in turn causes main bearing wear and cannot ensure reliable operation of the main bearing.

[0025] Therefore, if Figure 1 、 Figure 2 As shown, an embodiment of the present application provides a control method for an engine dual-circuit lubrication system, wherein the engine dual-circuit lubrication system includes a first lubrication circuit and a second lubrication circuit, wherein the first lubrication circuit includes a main oil gallery and an electronically controlled oil pump, and the second lubrication circuit includes a mechanical oil pump; the first lubrication circuit is used to lubricate the main bearing and the piston cooling nozzle; the control method for the engine dual-circuit lubrication system includes:

[0026] S101 obtains the main bearing lubricating oil temperature;

[0027] S102 determines whether the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit;

[0028] S103: If the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit, obtain the lubricating oil temperature of the main oil channel;

[0029] S104: determining a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery;

[0030] S105: determining whether the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery exceeds a maximum temperature difference limit;

[0031] S106: If the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel exceeds a maximum temperature difference limit, the main bearing is controlled to cool down.

[0032] First, the engine dual-circuit lubrication system includes a first lubrication circuit and a second lubrication circuit. The first lubrication circuit includes a main oil channel for lubricating the main bearings and piston cooling nozzles. This arrangement allows the first lubrication circuit to supply oil and lubricate the main bearings and piston cooling nozzles, so that the components with the largest lubricating oil flow, namely the main bearings and piston cooling nozzles, share a lubrication circuit, and other components share the second lubrication circuit. By precisely controlling the flow of the first lubrication circuit, the amount of lubricating oil used is reduced, and the power consumption of the oil pump is reduced. Secondly, the control method of the engine dual-circuit lubrication system determines the wear condition of the main bearing by the lubricating oil temperature of the main bearing, solving the technical problem that in the dual-circuit lubrication system, the preset value of the oil target pressure of the main bearing branch may deviate, resulting in insufficient oil flow to the main bearing, increased oil temperature, decreased viscosity, and thus wear of the main bearing, making it impossible to ensure the reliable operation of the main bearing. Specifically, it is judged whether the main bearing lubricating oil temperature exceeds the maximum temperature limit of the main bearing. When the main bearing lubricating oil temperature exceeds the maximum temperature limit of the main bearing, the risk of main bearing wear increases. Therefore, the cause of the high oil temperature of the main bearing is judged, the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel is determined, and it is judged whether the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel exceeds the maximum temperature difference limit. When the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel exceeds the maximum temperature difference limit, that is, the rise value of the main bearing lubricating oil temperature is greater than the maximum temperature difference limit, it can be considered that the high main bearing oil temperature is caused by insufficient main bearing oil flow. At this time, the main bearing is controlled to cool down.

[0033] As an optional implementation manner, if the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel does not exceed a maximum temperature difference limit, the main bearing load is reduced.

[0034] Specifically, when the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel does not exceed the maximum temperature difference limit, it can be considered that the increase in the main bearing lubricating oil temperature is caused by other reasons. At this time, the engine can be controlled to fundamentally reduce the load on the main bearing. For example, the engine can be speed-limited and torque-limited to reduce the oil temperature.

[0035] As an optional embodiment, the first lubrication circuit also includes a main bearing control valve, which is arranged between the main oil channel and the main bearing. If the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel exceeds the maximum temperature difference limit, controlling the main bearing to cool down includes: obtaining a first preset target pressure value of the main bearing front pressure; and increasing the first preset target pressure value of the main bearing front pressure according to the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel.

[0036] When the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel exceeds the maximum temperature difference limit, it can be considered that the high main bearing oil temperature is caused by insufficient main bearing oil flow. Therefore, at this time, the main bearing can be cooled and pressurized by increasing the amount of lubricating oil in the main bearing. Therefore, the main bearing pressure target value can be increased to be higher than the first preset target pressure value; specifically, the main bearing control valve opening can be increased and / or the electric motor oil pump speed can be increased.

[0037] In addition, a temperature safety value may be provided, and the temperature safety value may be less than the maximum temperature limit of the main bearing. When the main bearing lubricating oil temperature is less than the temperature safety value, it can be considered that the main bearing has sufficient lubricating oil remaining. After increasing the opening of the main bearing control valve to cool the main bearing lubricating oil, the main bearing lubricating oil temperature may be confirmed or acquired in real time to determine whether the main bearing lubricating oil temperature is greater than the temperature safety value. If the main bearing lubricating oil temperature is less than the temperature safety value, the main bearing inlet pressure value is acquired. It is determined whether the main bearing inlet pressure value is greater than the first preset target pressure value. If the main bearing inlet pressure value is greater than the first preset target pressure value, it can be considered that the main bearing inlet pressure is too high, and the target pressure value is lowered to the first preset target pressure value to reduce the main bearing lubricating oil quantity.

[0038] As an optional embodiment, the first lubrication circuit also includes a nozzle control valve, which is arranged between the main oil channel and the piston cooling nozzle; obtaining the first preset target pressure value of the main bearing front pressure includes: obtaining the engine speed and the throttle opening; confirming the first preset target pressure value of the main bearing front pressure and the nozzle preset target pressure value of the piston cooling nozzle front pressure based on the engine speed and the throttle opening.

[0039] Specifically, to achieve precise control of the first lubrication circuit, the corresponding target pressures must first be determined. The oil pressure requirements for the main bearing and piston cooling nozzles are related to engine speed and operating conditions. Therefore, the first preset target pressure value for the pressure in front of the main bearing and the preset target pressure value for the pressure in front of the piston cooling nozzles must be determined based on the engine speed and throttle opening.

[0040] As an optional embodiment, the control method also includes: determining the relationship between the first preset target pressure value and the nozzle preset target pressure value; if the first preset target pressure value is greater than the nozzle preset target pressure value, controlling the main bearing control valve to fully open, controlling the opening of the nozzle control valve according to the nozzle preset target pressure value, and adjusting the speed of the electronically controlled oil pump until the main bearing control valve reaches the first preset target pressure value and the nozzle control valve reaches the nozzle preset target pressure value.

[0041] As an optional embodiment, the control method also includes: if the first preset target pressure value is less than the nozzle preset target pressure value, controlling the nozzle control valve to be fully opened, controlling the opening of the main bearing control valve according to the first preset target pressure value, and adjusting the speed of the electronically controlled oil pump until the main bearing control valve reaches the first preset target pressure value and the nozzle control valve reaches the nozzle preset target pressure value.

[0042] As an optional implementation, the control method further includes: determining whether the engine speed is 0; if the engine speed is 0, controlling the main bearing control valve and the nozzle control valve to be closed.

[0043] Specifically, after the engine is shut down, the lubricating oil stored in the engine oil passages slowly flows back into the oil pan. When the engine is restarted, the lubricating oil needs to refill the passages, slowing the increase in lubricating oil pressure. Therefore, to increase the rate of lubricating oil pressure buildup during startup, various control valves can be closed after the engine is shut down to prevent lubricating oil backflow. This allows for rapid pressure buildup upon engine restart, further helping to reduce wear on the engine's main bearings.

[0044] According to another aspect of an embodiment of the present application, a dual-circuit lubrication system for an engine is provided, comprising a first lubrication circuit and a second lubrication circuit, wherein the first lubrication circuit comprises a main oil channel for lubricating a main bearing and a piston cooling nozzle, and further comprising:

[0045] Oil temperature acquisition module, used to obtain the main bearing lubricating oil temperature;

[0046] a temperature limit determination module, configured to determine whether the main bearing lubricating oil temperature exceeds a main bearing maximum temperature limit;

[0047] a lubricating oil temperature acquisition module, configured to acquire the lubricating oil temperature of the main oil channel if the lubricating oil temperature of the main bearing exceeds a maximum temperature limit of the main bearing;

[0048] a temperature difference determining module, configured to determine a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery;

[0049] a temperature difference limit determination module, configured to determine whether a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery exceeds a maximum temperature difference limit;

[0050] A cooling module is used to control the main bearing to cool down if the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel exceeds a maximum temperature difference limit.

[0051] Figure 3 is a structural block diagram of an optional electronic device according to an embodiment of the present application, such as Figure 3 As shown, it includes a processor 202, a communication interface 204, a memory 206 and a communication bus 208, wherein the processor 202, the communication interface 204 and the memory 206 complete communication with each other through the communication bus 208, wherein,

[0052] Memory 206, for storing computer programs;

[0053] The processor 202 is configured to execute the computer program stored in the memory 206 to implement the following steps:

[0054] Get the main bearing lubricating oil temperature;

[0055] Determining whether the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit;

[0056] If the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit, obtaining the lubricating oil temperature of the main oil channel;

[0057] determining a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery;

[0058] determining whether a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery exceeds a maximum temperature difference limit;

[0059] If the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel exceeds a maximum temperature difference limit, the main bearing is controlled to be cooled.

[0060] According to another aspect of the embodiment of the present application, an electronic device for a control method of an engine dual-circuit lubrication system is also provided. The electronic device may be a server, a terminal, or a combination thereof.

[0061] The communication interface is used for communication between the above electronic device and other devices.

[0062] The memory may include RAM, or may include non-volatile memory, such as at least one disk memory. Alternatively, the memory may also be at least one storage device located away from the aforementioned processor.

[0063] It may also include but is not limited to other module units in the above-mentioned engine dual-circuit lubrication system, which will not be described in detail in this example.

[0064] According to another aspect of the embodiment of the present application, a storage medium is further provided. Optionally, in this embodiment, the storage medium can be used to execute program code of a control method for a dual-circuit lubrication system of an engine.

[0065] Optionally, in this embodiment, the above-mentioned storage medium may be located on at least one network device among the multiple network devices in the network shown in the above-mentioned embodiment.

[0066] Optionally, in this embodiment, the storage medium is configured to store program codes for executing the following steps:

[0067] Get the main bearing lubricating oil temperature;

[0068] Determining whether the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit;

[0069] If the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit, obtaining the lubricating oil temperature of the main oil channel;

[0070] determining a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery;

[0071] determining whether a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery exceeds a maximum temperature difference limit;

[0072] If the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel exceeds a maximum temperature difference limit, the main bearing is controlled to be cooled.

[0073] For specific examples in this embodiment, reference can be made to the examples described in the above embodiments, which will not be described in detail in this embodiment.

[0074] Optionally, in this embodiment, the storage medium may include, but is not limited to, various media that can store program codes, such as a USB flash drive, a ROM, a RAM, a mobile hard disk, a magnetic disk, or an optical disk.

[0075] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0076] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above-mentioned computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling one or more electronic devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in each embodiment of the present application.

[0077] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0078] In the several embodiments provided in this application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are merely illustrative. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, and can be electrical or other forms.

[0079] The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected based on actual needs to achieve the purpose of the solution provided in this embodiment.

[0080] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0081] In the above embodiments of the present application, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0082] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A control method for an engine dual-circuit lubrication system, characterized in that: The engine dual-circuit lubrication system includes a first lubrication circuit and a second lubrication circuit. The first lubrication circuit includes a main oil gallery and an electronically controlled oil pump, and the second lubrication circuit includes a mechanical oil pump. The first lubrication circuit is used to lubricate the main bearings and piston cooling nozzles. The control method of the engine dual-circuit lubrication system includes: Get the main bearing lubricating oil temperature; Determining whether the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit; If the main bearing lubricating oil temperature exceeds the main bearing maximum temperature limit, obtaining the lubricating oil temperature of the main oil channel; determining a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery; determining whether a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel exceeds a maximum temperature difference limit; If the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel exceeds a maximum temperature difference limit, controlling the main bearing to cool down; The first lubrication circuit further includes a main bearing control valve, which is disposed between the main oil gallery and the main bearing. If a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery exceeds a maximum temperature difference limit, controlling the main bearing to cool down includes: Obtaining a first preset target pressure value of the main bearing front pressure; The first preset target pressure value of the main bearing front pressure is increased according to the lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil channel.

2. The control method of the engine dual-circuit lubrication system according to claim 1, characterized in that: The first lubrication circuit further includes a nozzle control valve, which is disposed between the main oil gallery and the piston cooling nozzle. The step of obtaining the first preset target pressure value of the front pressure of the main bearing includes: Get engine speed and throttle opening; The first preset target pressure value of the main bearing front pressure and the nozzle preset target pressure value of the piston cooling nozzle front pressure are determined according to the engine speed and the throttle opening.

3. The control method of the engine dual-circuit lubrication system according to claim 2, characterized in that: The control method further includes: Determining the magnitude relationship between the first preset target pressure value and the nozzle preset target pressure value; If the first preset target pressure value is greater than the nozzle preset target pressure value, the main bearing control valve is controlled to be fully opened, the opening of the nozzle control valve is controlled according to the nozzle preset target pressure value, and the speed of the electronically controlled oil pump is adjusted until the main bearing control valve reaches the first preset target pressure value and the nozzle control valve reaches the nozzle preset target pressure value.

4. The control method of the engine dual-circuit lubrication system according to claim 3, characterized in that: The control method further includes: If the first preset target pressure value is less than the nozzle preset target pressure value, the nozzle control valve is controlled to be fully opened, the opening of the main bearing control valve is controlled according to the first preset target pressure value, and the speed of the electronically controlled oil pump is adjusted until the main bearing control valve reaches the first preset target pressure value and the nozzle control valve reaches the nozzle preset target pressure value.

5. The control method of the engine dual-circuit lubrication system according to claim 2, characterized in that: The control method further includes: Determining whether the engine speed is 0; If the engine speed is 0, the main bearing control valve and the nozzle control valve are controlled to be closed.

6. An engine dual-circuit lubrication system, characterized in that: A control method for an engine dual-circuit lubrication system according to any one of claims 1 to 5, comprising a first lubrication circuit and a second lubrication circuit, wherein the first lubrication circuit comprises a main oil channel for lubricating a main bearing and a piston cooling nozzle, and further comprising: Oil temperature acquisition module, used to obtain the main bearing lubricating oil temperature; a temperature limit determination module, configured to determine whether the lubricating oil temperature of the main bearing exceeds a maximum temperature limit of the main bearing; a lubricating oil temperature acquisition module, configured to acquire the lubricating oil temperature of the main oil channel if the lubricating oil temperature of the main bearing exceeds a maximum temperature limit of the main bearing; a temperature difference determination module, configured to determine a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery; a temperature difference limit determination module, configured to determine whether a lubricating oil temperature difference between the lubricating oil temperature of the main bearing and the lubricating oil temperature of the main oil gallery exceeds a maximum temperature difference limit; A cooling module is used to control the main bearing to cool down if the lubricating oil temperature difference between the main bearing lubricating oil temperature and the lubricating oil temperature of the main oil channel exceeds a maximum temperature difference limit.

7. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein: The processor, the communication interface and the memory communicate with each other via the communication bus, wherein: The memory is used to store computer programs; The processor is configured to execute the steps of the control method for the dual-circuit lubrication system of an engine according to any one of claims 1 to 5 by running the computer program stored in the memory.

8. A computer-readable storage medium, characterized in that: The storage medium stores a computer program, wherein the computer program is configured to execute the steps of the control method for the dual-circuit lubrication system of an engine according to any one of claims 1 to 5 when running.

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