Engine oil pressure control method and device

Abstract

The application relates to an engine oil pressure control method and device, belonging to the technical field of automobile thermal management, wherein the method comprises the following steps: acquiring current operation parameters of an engine, and current engine oil pressures of a main oil passage and a secondary oil passage; determining a target engine oil pressure according to the current operation parameters; respectively performing filtering processing on the current engine oil pressures of the main oil passage and the secondary oil passage to obtain filtered engine oil pressures; obtaining a proportional factor according to the target engine oil pressure and the filtered engine oil pressures; and controlling a first opening degree of a variable engine oil pump of the main oil passage or a second opening degree of a piston cooling nozzle electromagnetic valve of the secondary oil passage according to the proportional factor, so that the variable engine oil pump and the piston cooling nozzle electromagnetic valve of the engine lubrication system are controlled in real time.

Description

Technical Field

[0001] This invention relates to the field of automotive thermal management technology, and more particularly to an oil pressure control method and device. Background Technology

[0002] With the rapid development of automotive technology, society is paying increasing attention to vehicle reliability, and engine reliability is particularly important. The reliability of engine lubrication largely determines the overall engine reliability. The engine lubrication system must operate under specific temperature and pressure conditions; therefore, ensuring the temperature and pressure of the lubrication system is crucial for guaranteeing engine reliability. The variable oil pump and piston cooling nozzle solenoid valve are important components of the engine lubrication system, and their operating status affects the engine's mechanical efficiency and lifespan.

[0003] Most piston cooling nozzle solenoid valves operate on an open-loop switching control mode. The variable oil pump and piston cooling nozzle solenoid valves are primarily controlled independently. When both the variable oil pump and the piston cooling nozzle valve simultaneously regulate the lubricating oil pressure, the variable oil pump regulates the main oil passage pressure, while the piston cooling nozzle valve regulates the secondary oil passage pressure. There is a coupling effect between the two: when the piston cooling nozzle valve opening is constant, the secondary oil passage pressure increases with increasing variable oil pump output and decreases with decreasing output. Similarly, when the variable oil pump output is constant, the main oil passage pressure decreases with increasing piston cooling nozzle valve opening and increases with decreasing opening. Therefore, real-time oil pressure monitoring is necessary. However, current technologies do not incorporate oil pressure and temperature sensors for real-time feedback of specific operating conditions. This prevents real-time control of the variable oil pump and piston cooling nozzle solenoid valves based on the actual operating state of the lubrication system, leading to energy waste.

[0004] Therefore, there is an urgent need to propose an oil pressure control method and device to solve the technical problem in the existing technology that the variable oil pump and piston cooling nozzle solenoid valve cannot be controlled in real time according to the actual working state of the lubrication system, resulting in energy waste. Summary of the Invention

[0005] In view of this, it is necessary to provide an oil pressure control method and device to solve the technical problem in the prior art that the variable oil pump and piston cooling nozzle solenoid valve cannot be controlled in real time according to the actual working state of the lubrication system, resulting in energy waste.

[0006] To address the above problems, the present invention provides an oil pressure control method, the method comprising: The engine's current operating parameters and the current oil pressure of the main oil passage and auxiliary oil passage are obtained, and the target oil pressure is determined based on the current operating parameters. The current oil pressure in the main oil passage and the auxiliary oil passage are filtered to obtain the filtered oil pressure. The scaling factor is obtained based on the target oil pressure and the filtered oil pressure. The first opening of the variable oil pump in the main oil passage is controlled according to the proportional factor, or the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage is controlled.

[0007] In one possible implementation, the current operating parameters include engine speed, torque, and oil temperature, and determining the target oil pressure based on the current operating parameters includes: Based on the engine speed, the torque, and the oil temperature, the target main oil passage oil pressure and the target auxiliary oil passage oil pressure are obtained.

[0008] In one possible implementation, the current oil pressure includes the main oil passage oil pressure of the main oil passage and the auxiliary oil passage oil pressure of the auxiliary oil passage. The step of filtering the current oil pressures of the main oil passage and the auxiliary oil passage to obtain filtered oil pressure includes: The main oil passage is filtered based on the main oil passage oil pressure and the target main oil passage oil pressure to obtain the filtered main oil passage oil pressure. The auxiliary oil passage is filtered based on the oil pressure in the auxiliary oil passage and the target oil pressure in the target auxiliary oil passage to obtain the filtered oil pressure in the auxiliary oil passage.

[0009] In one possible implementation, obtaining the scaling factor based on the target oil pressure and the filtered oil pressure includes: The oil pressure in the target main oil passage and the oil pressure in the filter main oil passage are calculated to obtain the scaling factor.

[0010] In one possible implementation, controlling the first opening of the variable oil pump in the main oil passage according to the proportional factor, or controlling the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage, includes: The target main oil passage oil pressure and the filtered main oil passage oil pressure are calculated based on the proportional factor to obtain the first control output of the variable oil pump. The target auxiliary oil passage oil pressure and the filter auxiliary oil passage oil pressure are calculated based on the proportional factor to obtain the second control output of the piston cooling nozzle solenoid valve. The first opening degree of the variable oil pump in the main oil passage is controlled according to the first control output, or the second opening degree of the piston cooling nozzle solenoid valve in the auxiliary oil passage is controlled according to the second control output.

[0011] In one possible implementation, controlling the first opening of the variable oil pump in the main oil passage according to the first control output, or controlling the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage according to the second control output, includes: The first opening degree of the variable oil pump is determined based on the first control output; The second opening degree of the piston cooling nozzle solenoid valve is determined based on the second control output; The variable oil pump is controlled according to the first opening degree, or the piston cooling nozzle solenoid valve is controlled according to the second opening degree.

[0012] In one possible implementation, controlling the variable oil pump according to the first opening degree, or controlling the piston cooling nozzle solenoid valve according to the second opening degree, includes: The error value is determined based on the target main oil passage oil pressure and the filter main oil passage oil pressure. Determine whether the error value is greater than a preset error threshold; If so, the variable oil pump is controlled according to the first opening degree; If not, the piston cooling nozzle solenoid valve is controlled according to the second opening degree.

[0013] In one possible implementation, filtering the main oil passage based on the main oil passage oil pressure and the target main oil passage oil pressure to obtain the filtered main oil passage oil pressure includes: The first error change value is obtained based on the main oil passage oil pressure and the target main oil passage oil pressure; Determine whether the first error change value is greater than a preset pressure threshold; If so, the main oil passage is filtered according to the first main oil passage filtering coefficient to obtain the filtered main oil passage oil pressure. If not, the main oil passage is filtered according to the second main oil passage filtering coefficient to obtain the filtered main oil passage oil pressure; the first main oil passage filtering coefficient is less than the second main oil passage filtering coefficient.

[0014] In one possible implementation, filtering the auxiliary oil passage based on the auxiliary oil passage oil pressure and the target auxiliary oil passage oil pressure to obtain the filtered auxiliary oil passage oil pressure includes: The second error change value is obtained based on the oil pressure in the auxiliary oil passage and the oil pressure in the target auxiliary oil passage; Determine whether the second error change value is greater than a preset pressure threshold; If so, the auxiliary oil passage is filtered according to the first auxiliary oil passage filter coefficient to obtain the filtered auxiliary oil passage oil pressure; If not, the auxiliary oil passage is filtered according to the second auxiliary oil passage filter coefficient to obtain the filtered auxiliary oil passage oil pressure; the first auxiliary oil passage filter coefficient is less than the second auxiliary oil passage filter coefficient.

[0015] On the other hand, the present invention also provides an oil pressure control device, the device comprising: The parameter acquisition module is used to acquire the current operating parameters of the engine, as well as the current oil pressure of the main oil passage and the auxiliary oil passage, and determine the target oil pressure based on the current operating parameters. The filtering module is used to filter the current oil pressure of the main oil passage and the auxiliary oil passage respectively to obtain the filtered oil pressure. The factor determination module is used to obtain a proportional factor based on the target oil pressure and the filtered oil pressure; The opening control module is used to control the first opening of the variable oil pump in the main oil passage according to the proportional factor, or to control the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage.

[0016] The beneficial effects of this invention are: it can acquire the current operating parameters of the engine, as well as the current oil pressure of the main oil passage and the auxiliary oil passage, and then determine the target oil pressure based on the current operating parameters. Furthermore, it can filter the current oil pressure of the main oil passage and the auxiliary oil passage to obtain filtered oil pressure. Then, based on the target oil pressure and the filtered oil pressure, a proportional factor can be obtained. This proportional factor can then be used to control the first opening of the variable oil pump in the main oil passage, or the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage. This allows for control of the oil pressure in the engine lubrication system based on the controlled opening, thereby achieving real-time control of the variable oil pump and piston cooling nozzle solenoid valve in the engine lubrication system. Attached Figure Description

[0017] Figure 1 A schematic flowchart of an embodiment of the oil pressure control method provided by the present invention; Figure 2 A schematic diagram of an embodiment of the engine lubrication system provided by the present invention; Figure 3 A schematic flowchart of an embodiment of the main oil passage filter provided by the present invention; Figure 4 A schematic flowchart of an embodiment of the auxiliary oil passage filter provided by the present invention; Figure 5 A schematic diagram of an embodiment of the oil pressure control device provided by the present invention; Figure 6 A schematic diagram of an embodiment of the electronic device provided by the present invention. Detailed Implementation

[0018] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0019] like Figure 1 As shown in the figure, a specific embodiment of the present invention discloses an oil pressure control method, the method comprising: S101. Obtain the current operating parameters of the engine, as well as the current oil pressure of the main oil passage and the auxiliary oil passage, and determine the target oil pressure based on the current operating parameters; S102. Filter the current oil pressure of the main oil passage and the auxiliary oil passage to obtain the filtered oil pressure. S103. Obtain the proportional factor based on the target oil pressure and the filtered oil pressure; S104. Control the first opening of the variable oil pump in the main oil passage according to the proportional factor, or control the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage.

[0020] The embodiments of the present invention can be applied to engine lubrication systems, such as engine lubrication systems. Figure 2 As shown, the main components of the engine lubrication system include rocker arm shaft oil passage, main oil passage, auxiliary oil passage, oil collector, variable oil pump, oil thermostat, bypass valve, oil cooler, oil coarse filter, piston cooling nozzle solenoid valve, oil temperature and level sensor, turbocharger, main oil passage oil pressure sensor, and auxiliary oil passage oil pressure sensor. By controlling the flow rate of the variable oil pump, the opening degree of the piston cooling nozzle solenoid valve, and the opening degree of the oil thermostat, the system achieves lubrication, cooling, and cleaning of engine accessories.

[0021] In this embodiment of the invention, the target oil pressure is the oil pressure required by the engine lubrication system. When the current operating parameters of the engine lubrication system change, and the change exceeds a preset range, the opening degree of the variable oil pump or piston cooling nozzle solenoid valve in the engine lubrication system can be controlled through this embodiment of the invention, thereby achieving the purpose of controlling the oil pressure in the engine lubrication system. For example, if the current engine speed, torque, or oil temperature exceeds a certain threshold range, it indicates that the load in the engine lubrication system has changed, and the current oil pressure cannot meet the needs of the engine lubrication system, so the oil pressure of the engine lubrication system needs to be adjusted.

[0022] Compared with the prior art, this embodiment provides the ability to acquire the current operating parameters of the engine, as well as the current oil pressure of the main oil passage and the auxiliary oil passage. Based on the current operating parameters, a target oil pressure can be determined. Furthermore, the current oil pressures of the main and auxiliary oil passages can be filtered to obtain filtered oil pressures. A proportionality factor can then be obtained based on the target oil pressure and the filtered oil pressure. This proportionality factor can then be used to control the first opening of the variable oil pump in the main oil passage, or the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage. This allows for control of the oil pressure in the engine lubrication system based on the controlled openings, thereby achieving real-time control of the variable oil pump and piston cooling nozzle solenoid valve in the engine lubrication system.

[0023] In some embodiments of the present invention, the current operating parameters include engine speed, torque, and oil temperature, and step S101 includes: Based on engine speed, torque, and oil temperature, the target main oil passage oil pressure and the target auxiliary oil passage oil pressure are obtained.

[0024] In a specific embodiment of the present invention, a traditional variable oil pump is driven by the engine crankshaft and always outputs maximum power, consuming more power. A variable oil pump, however, calculates the required oil pressure, i.e., the target main oil passage oil pressure, based on engine speed, torque, and oil temperature, thereby precisely controlling the main oil passage oil pressure. Compared to a traditional oil pump, the variable oil pump can adjust the main oil passage pressure value according to the required oil pressure, so a pressure relief valve is not needed after the variable oil pump. The piston cooling nozzle solenoid valve calculates the required auxiliary oil pressure, i.e., the target auxiliary oil passage oil pressure, based on engine speed, torque, and oil temperature, thereby precisely controlling the auxiliary oil passage oil pressure. Engine speed and torque can be obtained from the operating parameters of the engine lubrication system, and oil temperature can be detected by an oil temperature and level sensor. For example, an engine speed range can be set, and the corresponding main oil passage oil pressure range can be determined based on the range satisfied by the engine speed. Then, the initial oil pressure of the main oil passage corresponding to the main oil passage oil pressure range can be determined based on the torque. The initial oil pressure of the main oil passage can also be corrected by the oil temperature to obtain the target main oil passage oil pressure. Similarly, the target secondary oil passage oil pressure can be obtained. The specific process of obtaining the target main oil passage oil pressure and the target secondary oil passage oil pressure is not limited in this embodiment of the invention. The specific range setting can be set according to the actual situation. The target main oil passage oil pressure is the oil pressure that the main oil passage needs to achieve, and the target secondary oil passage oil pressure is the oil pressure that the secondary oil passage needs to achieve.

[0025] It should be noted that, in order to more accurately control the variable oil pump and the piston cooling nozzle solenoid valve, the main oil passage and the auxiliary oil passage can be filtered according to the different operating parameters of the engine lubrication system. In some embodiments of the present invention, the current oil pressure includes the main oil passage oil pressure of the main oil passage and the auxiliary oil passage oil pressure of the auxiliary oil passage. Step S102 includes: The main oil passage is filtered based on the main oil passage oil pressure and the target main oil passage oil pressure to obtain the filtered main oil passage oil pressure. The auxiliary oil passage is filtered based on the auxiliary oil passage oil pressure and the target auxiliary oil passage oil pressure to obtain the filtered auxiliary oil passage oil pressure.

[0026] In a specific embodiment of the present invention, the main oil passage oil pressure can be detected by a main oil passage oil pressure sensor in the engine lubrication system, and the auxiliary oil passage oil pressure can be detected by an auxiliary oil passage oil pressure sensor in the engine lubrication system. After obtaining the operating parameters of the engine lubrication system, the main oil passage can be filtered according to the main oil passage oil pressure, so that the filtered main oil passage oil pressure can be obtained by the sensor. Similarly, the auxiliary oil passage can be filtered according to the auxiliary oil passage oil pressure, so that the filtered auxiliary oil passage oil pressure can be obtained by the sensor.

[0027] It should be noted that, in order to achieve more accurate control of the variable oil pump and piston cooling nozzle solenoid valve, the main oil passage and auxiliary oil passage can be filtered according to different current operating parameters of the engine lubrication system. In some embodiments of this invention, such as... Figure 3 As shown, the main oil passage is filtered based on the main oil passage oil pressure and the target main oil passage oil pressure to obtain the filtered main oil passage oil pressure, including: S301. Based on the main oil passage oil pressure and the target main oil passage oil pressure, obtain the first error change value; S302. Determine whether the first error change value is greater than the preset pressure threshold; S303. If so, the main oil passage is filtered according to the first main oil passage filter coefficient to obtain the filtered main oil passage oil pressure. S304. If not, the main oil passage is filtered according to the second main oil passage filter coefficient to obtain the filtered main oil passage oil pressure; the first main oil passage filter coefficient is less than the second main oil passage filter coefficient. In a specific embodiment of the present invention, a first error change value can be calculated based on the main oil passage oil pressure and the target main oil passage oil pressure, such as calculating the difference. The specific calculation process is not limited in this embodiment of the present invention. The first error change value is used to represent the change in the oil pressure demand value in the main oil passage. It can be determined whether the first error change value of the main oil passage is greater than a preset pressure threshold. If it is, the filtering coefficient of the main oil passage can be determined to be a smaller first main oil passage filtering coefficient. The main oil passage is filtered according to the first main oil passage filtering coefficient to obtain the filtered main oil passage oil pressure. If it is not, the filtering coefficient of the main oil passage can be determined to be a larger second main oil passage filtering coefficient. The main oil passage is filtered according to the second main oil passage filtering coefficient to obtain the filtered main oil passage oil pressure.

[0028] In some embodiments of the present invention, such as Figure 4 As shown, the auxiliary oil passage is filtered based on the auxiliary oil passage oil pressure and the target auxiliary oil passage oil pressure to obtain the filtered auxiliary oil passage oil pressure, including: S401. Based on the auxiliary oil passage oil pressure and the target auxiliary oil passage oil pressure, obtain the second error change value; S402. Determine whether the second error change value is greater than the preset pressure threshold. S403. If so, then filter the secondary oil passage according to the first secondary oil passage filter coefficient to obtain the filtered secondary oil passage oil pressure. S404. If not, then filter the auxiliary oil passage according to the second auxiliary oil passage filter coefficient to obtain the filtered auxiliary oil passage oil pressure; the first auxiliary oil passage filter coefficient is less than the second auxiliary oil passage filter coefficient.

[0029] In a specific embodiment of the present invention, a second error change value can be calculated based on the oil pressure in the auxiliary oil passage and the target auxiliary oil passage, such as calculating the difference. The specific calculation process is not limited in this embodiment of the present invention. The second error change value is used to represent the change in the oil pressure demand value in the auxiliary oil passage. It can be determined whether the second error change value of the auxiliary oil passage is greater than a preset pressure threshold. If it is, the filtering coefficient of the auxiliary oil passage can be determined to be a smaller first auxiliary oil passage filtering coefficient. The auxiliary oil passage is filtered according to the first auxiliary oil passage filtering coefficient to obtain the filtered auxiliary oil passage oil pressure. If not, the filtering coefficient of the main oil passage can be determined to be a larger second auxiliary oil passage filtering coefficient. The auxiliary oil passage is filtered according to the second auxiliary oil passage filtering coefficient to obtain the filtered auxiliary oil passage oil pressure. The specific preset pressure threshold, the first main oil passage filtering coefficient, the second main oil passage filtering coefficient, the first auxiliary oil passage filtering coefficient, and the second auxiliary oil passage filtering coefficient can be set according to the actual situation. This embodiment of the present invention does not limit them.

[0030] In some embodiments of the present invention, step S103 includes: The proportionality factor is obtained by calculating the oil pressure in the target main oil passage and the oil pressure in the filter main oil passage.

[0031] In a specific embodiment of the present invention, after calculating the target main oil passage oil pressure and the filter main oil passage oil pressure, the scaling factor can be calculated as shown in formula (1): (1) In the formula, It is the target main oil passage oil pressure. It is the oil pressure in the main oil passage of the filter. b The adjustment coefficient can be selected based on the error between the target main oil passage oil pressure and the filter main oil passage oil pressure, i.e., the difference between the target main oil passage oil pressure and the filter main oil passage oil pressure. , b The value is between [0, 1] and decreases as the error increases.

[0032] In some embodiments of the present invention, step S103 includes The first control output of the variable oil pump is obtained by calculating the target main oil passage oil pressure and the filtered main oil passage oil pressure based on the proportional factor. The target auxiliary oil passage oil pressure and the filter auxiliary oil passage oil pressure are calculated based on the proportional factor to obtain the second control output of the piston cooling nozzle solenoid valve. The first control output controls the first opening degree of the variable oil pump in the main oil passage, or the second control output controls the second opening degree of the piston cooling nozzle solenoid valve in the auxiliary oil passage.

[0033] In a specific embodiment of the present invention, the difference between the target main oil passage oil pressure and the filter main oil passage oil pressure can be used as the input of the PID controller, and the output of the PID controller is the first control output. Calculate the first control output As shown in formulas (2) and (3): (2) (3) In the formula, It is the difference between the oil pressure in the main oil passage (filtered main oil passage) and the oil pressure in the target main oil passage; It is the proportional coefficient of the variable oil pump closed-loop regulation; It is the integral coefficient of the closed-loop regulation of the variable oil pump; It is the differential coefficient of the closed-loop regulation of the variable oil pump; It is the sum of the P, I, and D terms in the PID control calculation of the variable oil pump; wherein, the proportional coefficient, integral coefficient, and derivative coefficient can be set according to the actual situation, and the embodiments of the present invention do not impose any restrictions here.

[0034] The difference between the target auxiliary oil passage oil pressure and the filter auxiliary oil passage oil pressure can be used as the input to the PID controller, and the output of the PID controller is the second control output. Calculate the second control output As shown in formulas (4) and (5): (4) (5) In the formula, It is the difference between the oil pressure in the filter auxiliary oil passage and the oil pressure in the target auxiliary oil passage; It is the proportional coefficient for the closed-loop regulation of the piston cooling control valve; It is the integral coefficient of the closed-loop regulation of the piston cooling control valve; It is the differential coefficient of the closed-loop regulation of the piston cooling control valve; It is the sum of the P, I, and D terms in the PID control calculation of the piston cooling nozzle valve; wherein, the proportional coefficient, integral coefficient, and derivative coefficient can be set according to the actual situation, and the embodiments of the present invention do not impose any restrictions here.

[0035] Therefore, it can be based on the first control output The first opening of the variable oil pump in the main oil passage is controlled, or, according to the second control output... The second opening degree of the solenoid valve for the piston cooling nozzle in the auxiliary oil passage is controlled.

[0036] In some embodiments of the present invention, controlling the first opening degree of the variable oil pump in the main oil passage according to a first control output, or controlling the second opening degree of the piston cooling nozzle solenoid valve in the auxiliary oil passage according to a second control output, includes: The first opening degree of the variable oil pump is determined based on the first control output; The second opening degree of the piston cooling nozzle solenoid valve is determined based on the second control output; The variable oil pump is controlled according to the first opening degree, or the piston cooling nozzle solenoid valve is controlled according to the second opening degree.

[0037] In a specific embodiment of the present invention, after determining the first control output of the variable oil pump and the second control output of the piston cooling nozzle solenoid valve through the PID controller, the first opening degree of the variable oil pump and the second opening degree of the piston cooling nozzle solenoid valve can be determined.

[0038] In some embodiments of the present invention, controlling the variable oil pump according to a first opening degree, or controlling the piston cooling nozzle solenoid valve according to a second opening degree, includes: The error value is determined based on the target main oil passage oil pressure and the filter main oil passage oil pressure. Determine whether the error value is greater than the preset error threshold; If so, the variable oil pump is controlled according to the first opening degree; If not, the piston cooling nozzle solenoid valve is controlled according to the second opening degree.

[0039] In a specific embodiment of the present invention, in the pressure regulation control, the variable oil pump valve opening has a wider range of influence on the oil pressure. Therefore, the error value can be determined based on the target main oil passage oil pressure and the filter main oil passage oil pressure, i.e., the difference between the target main oil passage oil pressure and the filter main oil passage oil pressure. It can be judged whether the error value is greater than the preset error threshold. If it is, it indicates that the error in the main oil passage is large. The opening of the variable oil pump can be adjusted according to the first opening to control the oil pressure of the engine lubrication system, so that the actual oil pressure gradually approaches the target main oil passage oil pressure. If it is not, it indicates that the error in the main oil passage is small. The opening of the piston cooling nozzle solenoid valve can be adjusted according to the second opening to control the oil pressure of the engine lubrication system, so that the actual oil pressure gradually approaches the target main oil passage oil pressure.

[0040] This invention takes into account the coupling effect of the variable oil pump and the piston cooling nozzle solenoid valve, and designs an adaptive PID closed-loop pressure controller, which can avoid frequent adjustment of the actuator and reduce the fluctuation of oil pressure in the main and auxiliary oil passages.

[0041] To better implement the oil pressure control method in the embodiments of the present invention, based on the oil pressure control method, the embodiments of the present invention also provide an oil pressure control device, such as... Figure 5 As shown, the oil pressure control device 500 includes: The parameter acquisition module 501 is used to acquire the current operating parameters of the engine, as well as the current oil pressure of the main oil passage and the auxiliary oil passage, and to determine the target oil pressure based on the current operating parameters. The filtering module 502 is used to filter the current oil pressure of the main oil passage and the auxiliary oil passage respectively to obtain the filtered oil pressure. The factor determination module 503 is used to obtain the proportional factor based on the target oil pressure and the filtered oil pressure; The opening control module 504 is used to control the first opening of the variable oil pump in the main oil passage according to the proportional factor, or to control the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage.

[0042] The oil pressure control device 500 provided in the above embodiments can realize the technical solutions described in the above oil pressure control method embodiments. The specific implementation principles of each module or unit can be found in the corresponding content of the above oil pressure control method embodiments, and will not be repeated here.

[0043] like Figure 6 As shown, the present invention also provides an electronic device 600. The electronic device 600 includes a processor 601, a memory 602, and a display 603. Figure 6 Only some components of the electronic device 600 are shown, but it should be understood that it is not required to implement all the components shown, and more or fewer components may be implemented instead.

[0044] In some embodiments, memory 602 may be an internal storage unit of electronic device 600, such as a hard disk or memory of electronic device 600. In other embodiments, memory 602 may also be an external storage device of electronic device 600, such as a plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, etc. equipped on electronic device 600.

[0045] Furthermore, the memory 602 may include both internal storage units of the electronic device 600 and external storage devices. The memory 602 is used to store application software and various types of data installed on the electronic device 600.

[0046] In some embodiments, processor 601 may be a central processing unit (CPU), a microprocessor, or other data processing chip, used to run program code stored in memory 602 or process data, such as the oil pressure control method of the present invention.

[0047] In some embodiments, display 603 may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen. Display 603 is used to display information from electronic device 600 and to display a visual user interface. Components 601-603 of electronic device 600 communicate with each other via a system bus.

[0048] In some embodiments of the present invention, when the processor 601 executes the oil pressure control program in the memory 602, the following steps can be implemented, including: Obtain the current operating parameters of the engine, as well as the current oil pressure of the main oil passage and the auxiliary oil passage, and determine the target oil pressure based on the current operating parameters; The current oil pressure in the main oil passage and the auxiliary oil passage is filtered to obtain the filtered oil pressure. The proportionality factor is obtained based on the target oil pressure and the filtered oil pressure. The first opening of the variable oil pump in the main oil passage is controlled according to the proportional factor, or the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage is controlled.

[0049] It should be understood that when the processor 601 executes the oil pressure control program in the memory 602, in addition to the functions mentioned above, it can also perform other functions, as detailed in the description of the corresponding method embodiments above.

[0050] Furthermore, this embodiment of the invention does not specifically limit the type of electronic device 600 mentioned. Electronic device 600 can be a mobile phone, tablet computer, personal digital assistant (PDA), wearable device, laptop computer, or other portable electronic device. Exemplary embodiments of portable electronic devices include, but are not limited to, portable electronic devices running iOS, Android, Microsoft, or other operating systems. The aforementioned portable electronic device can also be other portable electronic devices, such as a laptop computer with a touch-sensitive surface (e.g., a touch panel). It should also be understood that in some other embodiments of the invention, electronic device 600 may not be a portable electronic device, but rather a desktop computer with a touch-sensitive surface (e.g., a touch panel).

[0051] Accordingly, this application also provides a computer-readable storage medium for storing computer-readable programs or instructions. When the programs or instructions are executed by a processor, they can implement the oil pressure control method steps or functions provided in the above-described method embodiments.

[0052] Those skilled in the art will understand that all or part of the processes of the methods described in the above embodiments can be implemented by a computer program instructing related hardware (such as a processor, controller, etc.), and the computer program can be stored in a computer-readable storage medium. The computer-readable storage medium may be a disk, optical disk, read-only memory, or random access memory, etc.

[0053] The oil pressure control method and device provided by the present invention have been described in detail above. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for controlling engine oil pressure, characterized in that, The method includes: The engine's current operating parameters and the current oil pressure of the main oil passage and auxiliary oil passage are obtained, and the target oil pressure is determined based on the current operating parameters. The current oil pressure in the main oil passage and the auxiliary oil passage are filtered to obtain the filtered oil pressure. Based on the target oil pressure and the filtered oil pressure, the scaling factor a is obtained; The first opening of the variable oil pump in the main oil passage is controlled according to the proportional factor, or the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage is controlled. The step of obtaining the scaling factor 'a' based on the target oil pressure and the filtered oil pressure includes: The oil pressure in the target main oil passage and the oil pressure in the filtered main oil passage are calculated to obtain the scaling factor a; The control of the first opening degree of the variable oil pump in the main oil passage according to the proportional factor a, or the control of the second opening degree of the piston cooling nozzle solenoid valve in the auxiliary oil passage, includes: The target main oil passage oil pressure and the filtered main oil passage oil pressure are calculated based on the proportional factor a to obtain the first control output of the variable oil pump. The target auxiliary oil passage oil pressure and the filter auxiliary oil passage oil pressure are calculated based on the proportional factor a to obtain the second control output of the piston cooling nozzle solenoid valve. The first opening degree of the variable oil pump in the main oil passage is controlled according to the first control output, or the second opening degree of the piston cooling nozzle solenoid valve in the auxiliary oil passage is controlled according to the second control output. The step of controlling the first opening degree of the variable oil pump in the main oil passage according to the first control output, or controlling the second opening degree of the piston cooling nozzle solenoid valve in the auxiliary oil passage according to the second control output, includes: The first opening degree of the variable oil pump is determined based on the first control output; The second opening degree of the piston cooling nozzle solenoid valve is determined based on the second control output; The variable oil pump is controlled according to the first opening degree, or the piston cooling nozzle solenoid valve is controlled according to the second opening degree; The control of the variable oil pump according to the first opening degree, or the control of the piston cooling nozzle solenoid valve according to the second opening degree, includes: The error value is determined based on the target main oil passage oil pressure and the filter main oil passage oil pressure. Determine whether the error value is greater than a preset error threshold; If so, the variable oil pump is controlled according to the first opening degree; If not, the piston cooling nozzle solenoid valve is controlled according to the second opening degree; The formula for calculating the scaling factor 'a' is: In the formula, The target is the main oil passage oil pressure. To filter the oil pressure in the main oil passage, b The adjustment coefficient is selected based on the error between the target main oil passage oil pressure and the filter main oil passage oil pressure, i.e., the difference between the target main oil passage oil pressure and the filter main oil passage oil pressure. The value of b is between [0, 1], and the value decreases as the error increases.

2. The oil pressure control method according to claim 1, characterized in that, The current operating parameters include engine speed, torque, and oil temperature. Determining the target oil pressure based on the current operating parameters includes: Based on the engine speed, the torque, and the oil temperature, the target main oil passage oil pressure and the target auxiliary oil passage oil pressure are obtained.

3. The oil pressure control method according to claim 2, characterized in that, The current oil pressure includes the main oil passage oil pressure of the main oil passage and the auxiliary oil passage oil pressure of the auxiliary oil passage. The process of filtering the current oil pressures of the main oil passage and the auxiliary oil passage to obtain filtered oil pressure includes: The main oil passage is filtered based on the main oil passage oil pressure and the target main oil passage oil pressure to obtain the filtered main oil passage oil pressure. The auxiliary oil passage is filtered based on the auxiliary oil passage oil pressure and the target auxiliary oil passage oil pressure to obtain the filtered auxiliary oil passage oil pressure.

4. The oil pressure control method according to claim 3, characterized in that, The step of filtering the main oil passage based on the main oil passage oil pressure and the target main oil passage oil pressure to obtain the filtered main oil passage oil pressure includes: The first error change value is obtained based on the main oil passage oil pressure and the target main oil passage oil pressure; Determine whether the first error change value is greater than a preset pressure threshold; If so, the main oil passage is filtered according to the first main oil passage filtering coefficient to obtain the filtered main oil passage oil pressure. If not, the main oil passage is filtered according to the second main oil passage filtering coefficient to obtain the filtered main oil passage oil pressure; the first main oil passage filtering coefficient is less than the second main oil passage filtering coefficient.

5. The oil pressure control method according to claim 3, characterized in that, The step of filtering the auxiliary oil passage based on the auxiliary oil passage oil pressure and the target auxiliary oil passage oil pressure to obtain the filtered auxiliary oil passage oil pressure includes: The second error change value is obtained based on the oil pressure in the auxiliary oil passage and the oil pressure in the target auxiliary oil passage; Determine whether the second error change value is greater than a preset pressure threshold; If so, the auxiliary oil passage is filtered according to the first auxiliary oil passage filter coefficient to obtain the filtered auxiliary oil passage oil pressure; If not, the auxiliary oil passage is filtered according to the second auxiliary oil passage filter coefficient to obtain the filtered auxiliary oil passage oil pressure; the first auxiliary oil passage filter coefficient is less than the second auxiliary oil passage filter coefficient.

6. An oil pressure control device, characterized in that, The apparatus for performing the oil pressure control method according to any one of claims 1 to 5, the apparatus comprising: The parameter acquisition module is used to acquire the current operating parameters of the engine, as well as the current oil pressure of the main oil passage and the auxiliary oil passage, and determine the target oil pressure based on the current operating parameters. The filtering module is used to filter the current oil pressure of the main oil passage and the auxiliary oil passage respectively to obtain the filtered oil pressure. The factor determination module is used to obtain a proportional factor based on the target oil pressure and the filtered oil pressure; The opening control module is used to control the first opening of the variable oil pump in the main oil passage according to the proportional factor, or to control the second opening of the piston cooling nozzle solenoid valve in the auxiliary oil passage.

Images