Oil pressure control method, device and equipment of engine

Abstract

The invention discloses an oil pressure control method, device and equipment for an engine, and the method comprises the steps: in the operation process of a target engine, obtaining a plurality of historical operation working conditions of the target engine, and the historical operation duration of each working condition in the plurality of historical operation working conditions; determining a first friction pair gap of the target engine based on the plurality of historical operation conditions and the historical operation duration of each of the plurality of historical operation conditions; based on the first friction pair gap of the target engine and a preset corresponding relation, target oil pressure is determined; the preset corresponding relation is obtained by testing the oil consumption of the test engine when the test engine is in different working states; an oil pressure of the target engine is controlled based on the target oil pressure. The technical problem that the oil consumption of the engine is too high is solved.

Description

Technical Field

[0001] This invention belongs to the field of engine technology, and particularly relates to an engine oil pressure control method, device and equipment. Background Technology

[0002] During vehicle use, engine fuel consumption gradually increases with engine operating time. To reduce fuel consumption, current technologies primarily focus on improving combustion efficiency by optimizing the intake or fuel injection system, or by increasing intake volume. While these methods reduce fuel consumption to some extent, they are insufficient. Lower fuel consumption remains a goal for automakers; only by producing engines with lower fuel consumption can automakers further expand their market share. Therefore, excessively high engine fuel consumption is a pressing technical problem that needs to be solved. Summary of the Invention

[0003] This invention provides an engine oil pressure control method, device, and equipment, which solves the technical problem of excessive engine oil consumption.

[0004] In a first aspect, embodiments of the present invention provide an engine oil pressure control method, comprising: during the operation of a target engine, acquiring multiple historical operating conditions of the target engine, and the historical running time of each of the multiple historical operating conditions; determining a first friction pair clearance of the target engine based on the multiple historical operating conditions and the historical running time of each of the multiple historical operating conditions; determining a target oil pressure based on the first friction pair clearance of the target engine and a preset correspondence; the preset correspondence is obtained by performing fuel consumption tests on the test engine under different operating conditions; and controlling the oil pressure of the target engine based on the target oil pressure.

[0005] In conjunction with the first aspect of the present invention, in some embodiments, determining the first friction pair clearance of the target engine based on the plurality of historical operating conditions and the historical operating duration of each of the plurality of historical operating conditions includes: for each of the plurality of historical operating conditions, determining a sub-clearance corresponding to the historical operating condition based on the historical operating condition and the historical operating duration of the historical operating condition; and determining the first friction pair clearance of the target engine based on the sub-clearance of each of the plurality of historical operating conditions.

[0006] In conjunction with the first aspect of the present invention, in some embodiments, determining the first friction pair clearance of the target engine based on the sub-clearance of each of the plurality of historical operating conditions includes: summing the sub-clearances of each of the plurality of historical operating conditions as the first friction pair clearance of the target engine.

[0007] In conjunction with the first aspect of the present invention, in some embodiments, determining the target oil pressure based on the first friction pair clearance of the target engine and a preset correspondence includes: obtaining the current oil temperature of the target engine; correcting the first friction pair clearance of the target engine based on the current oil temperature to obtain a second friction pair clearance; and determining the target oil pressure based on the second friction pair clearance and the preset correspondence.

[0008] In conjunction with the first aspect of the present invention, in some embodiments, the step of correcting the first friction pair clearance of the target engine based on the current oil temperature to obtain a second friction pair clearance includes: correcting the first friction pair clearance of the target engine based on the current oil temperature, as well as a preset reference oil temperature, the coefficient of thermal expansion of the bearing outer ring material of the target engine, the bearing outer ring diameter, the coefficient of thermal expansion of the bearing inner ring material, and the bearing inner ring diameter, to obtain a second friction pair clearance.

[0009] In conjunction with the first aspect of the present invention, in some embodiments, the preset correspondence is a correspondence between the friction pair clearance and the oil pressure; determining the target oil pressure based on the second friction pair clearance and the preset correspondence includes: inputting the second friction pair clearance into the preset correspondence to obtain the target oil pressure.

[0010] In conjunction with the first aspect of the present invention, in some embodiments, the preset correspondence is a correspondence between operating conditions, engine oil temperature, friction pair clearance, and oil pressure; determining the target oil pressure based on the second friction pair clearance and the preset correspondence includes: obtaining the current operating conditions of the target engine; inputting the current operating conditions, the current engine oil temperature, and the second friction pair clearance into the preset correspondence to obtain the target oil pressure.

[0011] In conjunction with the first aspect of the present invention, in some embodiments, the preset correspondence is established through the following steps: acquiring multiple sets of test data, each set of test data including the test operating conditions of the test engine, the test oil temperature, and the test friction pair clearance; for each set of test data, controlling the test engine based on that set of test data to put the test engine in a test operating state; in the test operating state, controlling the test engine in time periods based on multiple preset test oil pressures to obtain the test oil consumption corresponding to each of the multiple test oil pressures; selecting the test oil pressure corresponding to the minimum test oil consumption among the multiple test oil pressures as the optimal test oil pressure corresponding to that set of test data; and obtaining the preset correspondence based on the multiple sets of test data and the optimal test oil pressure corresponding to each set of test data.

[0012] Secondly, embodiments of the present invention provide an engine oil pressure control device, comprising: an information acquisition unit, configured to acquire multiple historical operating conditions of the target engine and the historical running time of each of the multiple historical operating conditions during the operation of the target engine; a clearance determination unit, configured to determine a first friction pair clearance of the target engine based on the multiple historical operating conditions and the historical running time of each of the multiple historical operating conditions; an oil pressure determination unit, configured to determine a target oil pressure based on the first friction pair clearance of the target engine and a preset correspondence; the preset correspondence is obtained by performing fuel consumption tests on the test engine under different operating conditions; and an oil pressure control unit, configured to control the oil pressure of the target engine based on the target oil pressure.

[0013] Thirdly, embodiments of the present invention provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in any of the first aspects.

[0014] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages: This invention, through its embodiments, acquires multiple historical operating conditions of the target engine during operation, along with the historical duration of each of these conditions. Based on these historical operating conditions and their durations, it determines the first friction pair clearance of the target engine. Then, based on the first friction pair clearance and a preset correspondence, it determines the target oil pressure. This preset correspondence is obtained by conducting fuel consumption tests on the test engine under different operating conditions. Finally, it controls the oil pressure of the target engine based on the target oil pressure. Since different engine oil pressures result in different oil film thicknesses on the friction pairs when the friction pair clearance is constant, and these different oil film thicknesses lead to different friction coefficients between the friction pairs, resulting in different frictional work generated by the relative motion of the friction pairs, ultimately affecting the engine's fuel consumption. Therefore, engine oil pressure can influence engine fuel consumption by affecting the oil film thickness on the friction pairs. In other words, by controlling the first friction pair clearance of the target engine, a lower target oil pressure can be determined, thereby reducing engine fuel consumption. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of the oil pressure control method for an engine in an embodiment of the present invention; Figure 2 This is a functional block diagram of the oil pressure control device for the engine in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0019] This invention provides an engine oil pressure control method, referring to... Figure 1 As shown, the method includes the following steps S101 to S104: S101: During the operation of the target engine, acquire multiple historical operating conditions of the target engine, as well as the historical operating duration of each of the multiple historical operating conditions.

[0020] It should be noted that historical operating conditions refer to all operating conditions that the target engine has undergone since its production.

[0021] S102: Determine the first friction pair clearance of the target engine based on multiple historical operating conditions and the historical operating time of each of the multiple historical operating conditions.

[0022] It should be noted that there are various types of friction pairs in an engine, such as the crankshaft-connecting rod friction pair, the piston-connecting rod friction pair, etc. Preferably, the friction pair is the crankshaft-connecting rod friction pair, and the first friction pair clearance is the clearance between the crankshaft and connecting rod friction pairs. Because the friction work of the crankshaft-connecting rod friction pair is the greatest and has the greatest impact on engine fuel consumption, the oil pressure determined based on the clearance of the crankshaft-connecting rod friction pair makes the target oil pressure more targeted, which can significantly reduce the friction work of the crankshaft-connecting rod friction pair, and thus further reduce engine fuel consumption.

[0023] In some implementations, determining the first friction pair clearance of the target engine based on multiple historical operating conditions and the historical operating duration of each of the multiple historical operating conditions includes: for each of the multiple historical operating conditions, determining the sub-clearance corresponding to the historical operating condition based on the historical operating condition and the historical operating duration of the historical operating condition; and determining the first friction pair clearance of the target engine based on the sub-clearance of each of the multiple historical operating conditions.

[0024] In some implementations, the first friction pair clearance of the target engine is determined based on the sub-clearances of each of the multiple historical operating conditions, including: summing the sub-clearances of each of the multiple historical operating conditions as the first friction pair clearance of the target engine.

[0025] S103: Determine the target oil pressure based on the first friction pair clearance of the target engine and the preset correspondence; the preset correspondence is obtained by testing the fuel consumption of the test engine under different working conditions.

[0026] In some implementations, the target oil pressure is determined based on the first friction pair clearance of the target engine and a preset correspondence, including the following steps S1031 to S1033: S1031: Obtain the current oil temperature of the target engine.

[0027] S1032: Based on the current oil temperature, correct the clearance of the first friction pair of the target engine to obtain the clearance of the second friction pair.

[0028] In some implementations, the first friction pair clearance of the target engine is corrected based on the current oil temperature to obtain the second friction pair clearance. This includes: correcting the first friction pair clearance of the target engine based on the current oil temperature, as well as a preset reference oil temperature, the coefficient of thermal expansion of the outer ring material of the bearing, the outer ring diameter of the bearing, the coefficient of thermal expansion of the inner ring material of the bearing, and the inner ring diameter of the bearing.

[0029] Specifically, the correction can be made using the following formula:

[0030] Where, α 外 D is the coefficient of thermal expansion of the bearing outer ring material. 外 Where T1 is the bearing outer ring diameter, T2 is the current oil temperature, and α is the reference oil temperature. 内 D is the coefficient of thermal expansion of the bearing inner ring material. 内 The inner ring diameter of the bearing. h is the correction amount, h1 is the clearance of the first friction pair, and h2 is the clearance of the second friction pair.

[0031] It should be noted that the degree of expansion of the friction pair varies at different temperatures, which in turn causes the friction pair clearance to change. Therefore, the embodiments of the present invention not only determine the friction pair clearance based on the historical running time of each of the multiple historical operating conditions, but also correct the friction pair clearance by temperature, taking into account the influence of different temperatures on the expansion of the friction pair, thereby improving the accuracy of the friction pair clearance data.

[0032] S1033: Determine the target oil pressure based on the clearance of the second friction pair and the preset correspondence.

[0033] It should be noted that, given a fixed clearance between the friction pairs in an engine, different engine oil pressures will result in varying oil film thicknesses on the friction pairs. These different oil film thicknesses, in turn, lead to different coefficients of friction between the pairs, resulting in varying frictional work generated by the relative motion of the pairs, ultimately affecting engine fuel consumption. Therefore, engine oil pressure can influence engine fuel consumption by affecting the thickness of the oil film on the friction pairs. In other words, by controlling the clearance between the friction pairs, a target oil pressure with lower fuel consumption can be determined, thereby reducing engine fuel consumption.

[0034] It should be noted that, in addition to the clearance of the second friction pair affecting the determination of the target oil pressure, the operating conditions of the target engine and the oil temperature also affect the target oil pressure. These factors can be considered individually, or a combination of some or all of them can be used to determine the target oil pressure. The details are explained below: In some implementations, the preset correspondence is the correspondence between the friction pair clearance and the oil pressure; determining the target oil pressure based on the second friction pair clearance and the preset correspondence includes: inputting the second friction pair clearance into the preset correspondence to obtain the target oil pressure.

[0035] When the preset correspondence is between friction pair clearance and oil pressure, the preset correspondence is established through the following steps: Acquire multiple sets of test data, each set including the test friction pair clearance of the test engine; for each set of test data, control the test engine based on that set of test data to put the test engine into test operation mode; in test operation mode, control the test engine based on multiple preset test oil pressures in time periods to obtain the test oil consumption corresponding to each test oil pressure; among the test oil consumption corresponding to each test oil pressure in the multiple test oil pressures, select the test oil pressure corresponding to the minimum test oil consumption as the optimal test oil pressure corresponding to that set of test data; based on multiple sets of test data and the optimal test oil pressure corresponding to each set of test data, obtain the preset correspondence.

[0036] In other embodiments, the preset correspondence is the correspondence between operating conditions, oil temperature, friction pair clearance, and oil pressure; the target oil pressure is determined based on the second friction pair clearance and the preset correspondence, including: obtaining the current operating conditions of the target engine; and inputting the current operating conditions, current oil temperature, and second friction pair clearance into the preset correspondence to obtain the target oil pressure.

[0037] When the preset correspondence is between operating conditions, engine oil temperature, friction pair clearance, and oil pressure, the preset correspondence is established through the following steps: Acquire multiple sets of test data, each set including the test engine's test operating conditions, test engine oil temperature, and test friction pair clearance; for each set of test data, control the test engine based on that set to put the test engine into test operation mode; in test operation mode, control the test engine at different time periods based on multiple preset test oil pressures to obtain the test oil consumption corresponding to each of the multiple test oil pressures; among the test oil consumption corresponding to each of the multiple test oil pressures, select the test oil pressure corresponding to the minimum test oil consumption as the optimal test oil pressure corresponding to that set of test data; based on the multiple sets of test data and the optimal test oil pressure corresponding to each set of test data, obtain the preset correspondence.

[0038] In some other embodiments, the preset correspondence is the correspondence between operating conditions, friction pair clearance, and oil pressure; the target oil pressure is determined based on the second friction pair clearance and the preset correspondence, including: obtaining the current operating conditions of the target engine; and inputting the current operating conditions and the second friction pair clearance into the preset correspondence to obtain the target oil pressure.

[0039] When the preset correspondence is a correspondence between operating conditions, friction pair clearance, and oil pressure, the preset correspondence is established through the following steps: Acquire multiple sets of test data, each set including the test operating conditions of the test engine and the test friction pair clearance; for each set of test data, control the test engine based on that set of test data to put the test engine in a test operating state; in the test operating state, control the test engine in time periods based on multiple preset test oil pressures to obtain the test oil consumption corresponding to each of the multiple test oil pressures; among the test oil consumption corresponding to each of the multiple test oil pressures, select the test oil pressure corresponding to the minimum test oil consumption as the optimal test oil pressure corresponding to that set of test data; based on the multiple sets of test data and the optimal test oil pressure corresponding to each set of test data, obtain the preset correspondence.

[0040] It should be noted that when the preset correspondence is between friction pair clearance and oil pressure, the amount of input data is small, thus achieving the beneficial effect of quickly determining the target oil pressure, but the accuracy is low. Therefore, in some embodiments, the present invention specifies the preset correspondence as the correspondence between operating conditions, oil temperature, friction pair clearance, and oil pressure. This achieves the comprehensive consideration of operating conditions, oil temperature, and friction pair clearance to determine oil pressure, avoiding the situation where low oil pressure accuracy is caused by considering only a single factor, thereby improving the accuracy of the engine's target oil pressure.

[0041] It should be noted that the oil temperature and target oil pressure mentioned in the above method can be set for the main oil passage of the target engine. This avoids adjusting the oil pressure of the main oil passage by using data from other branch oil passages, making the target oil pressure more targeted to adjust the main oil passage. Since the main oil passage is the most important part of engine fuel consumption control, this further reduces engine fuel consumption.

[0042] S104: Control the oil pressure of the target engine based on the target oil pressure.

[0043] It should be noted that an oil pressure sensor can be installed in the main oil passage of the engine. The actual oil pressure in the main oil passage is measured by the oil pressure sensor, and then the oil pump displacement is adjusted to make the actual oil pressure in the main oil passage reach the target oil pressure.

[0044] It should be noted that during vehicle use, fuel consumption gradually increases with engine operating time. To reduce fuel consumption, current technologies primarily improve combustion efficiency by optimizing the intake or fuel injection system, or by increasing intake volume. While these methods reduce fuel consumption to some extent, they are insufficient. Lower fuel consumption remains a goal for automakers; only by producing engines with lower fuel consumption can automakers further expand their market share. Additionally, the engine lubrication system, through an oil pump, provides lubricating oil at a certain pressure to each friction pair, forming an oil film of a certain thickness on the friction pair surfaces. This reduces the coefficient of friction, lowers engine friction work, and also reduces fuel consumption. However, as engine usage time increases, the clearances of bearings and other friction pairs widen, reducing the thickness of the oil film formed under the same oil pressure. This results in poorer lubrication of the friction pair surfaces and increased friction work. To address this issue, if a variable displacement oil pump is used to set a target oil pressure, that is, when the bearing clearance increases, leading to increased oil leakage and a drop in oil pressure, the increased oil leakage is compensated by adjusting the displacement of the variable displacement oil pump, so that the actual oil pressure can still reach the target oil pressure. While this technique can maintain the actual oil pressure in the engine's main oil passage at the set target oil pressure by adjusting the oil pump displacement, the target oil pressure determined by this method cannot achieve the lowest possible fuel consumption. Therefore, the method proposed in this embodiment of the invention aims to reduce fuel consumption.

[0045] It should be noted that different engine bearing clearances result in varying oil film thicknesses due to the oil pressure applied to the bearing clearances. Different oil film thicknesses lead to different friction coefficients between the bearing friction pairs, and consequently, different frictional work generated by the relative motion of the bearing friction pairs. Increasing the oil pressure applied to the bearing clearances can increase the oil film thickness and reduce frictional work. However, increasing the oil pressure requires increasing the oil pump's displacement, which consumes more power to drive the pump. Therefore, the oil pump's displacement cannot be increased indefinitely. Adjusting the oil pump displacement to increase oil pressure and thus increase the oil film thickness in the bearing clearances reduces frictional work between the bearing friction pairs, but it also increases the power consumed by the oil pump. A balance must be struck between these two factors to achieve optimal overall power consumption and reduce the engine's total power consumption. To address this balance issue, the embodiments of this invention propose the above-mentioned method, which can determine the optimal oil pressure to reduce fuel consumption.

[0046] It should be noted that the pre-defined correspondence can be determined through testing on an engine performance test bench. Specifically, an electric dynamometer can accurately measure the engine's output power and torque. The test bench uses a fuel consumption meter to measure the engine's fuel consumption rate. The engine crankshaft drives the engine oil pump via a chain, and an oil pressure sensor is installed in the main oil passage to measure the main oil pressure. By assembling customized bearing samples, engines with bearing clearances within these four ranges are obtained. The electric dynamometer precisely controls the engine's output speed, power, and torque to correspond to different engine operating conditions. The fuel consumption meter can dynamically measure the engine's fuel consumption rate under different operating conditions. Additionally, it should be noted that before the first service of a new car, because the engine has not yet undergone break-in, the clearances between the friction pairs are small, and more metal particles are generated in the engine oil. These need to be drained by changing the engine oil during the first service. Furthermore, the first service mileage is generally short, and the wear of the friction pairs is minimal, so oil pressure self-learning and the above-mentioned adjustment methods are not necessary.

[0047] This invention, through its embodiments, acquires multiple historical operating conditions of the target engine during operation, along with the historical duration of each of these conditions. Based on these historical operating conditions and their durations, it determines the first friction pair clearance of the target engine. Then, based on the first friction pair clearance and a preset correspondence, it determines the target oil pressure. This preset correspondence is obtained by conducting fuel consumption tests on the test engine under different operating conditions. Finally, it controls the oil pressure of the target engine based on the target oil pressure. Since different engine oil pressures result in different oil film thicknesses on the friction pairs when the friction pair clearance is constant, and these different oil film thicknesses lead to different friction coefficients between the friction pairs, resulting in different frictional work generated by the relative motion of the friction pairs, ultimately affecting the engine's fuel consumption. Therefore, engine oil pressure can influence engine fuel consumption by affecting the oil film thickness on the friction pairs. In other words, by controlling the first friction pair clearance of the target engine, a lower target oil pressure can be determined, thereby reducing engine fuel consumption.

[0048] Based on the same inventive concept, and referring to Figure 2As shown, this embodiment of the invention provides an engine oil pressure control device 10, including: an information acquisition unit 110, used to acquire multiple historical operating conditions of the target engine and the historical running time of each of the multiple historical operating conditions during the operation of the target engine; a clearance determination unit 120, used to determine the first friction pair clearance of the target engine based on the multiple historical operating conditions and the historical running time of each of the multiple historical operating conditions; an oil pressure determination unit 130, used to determine the target oil pressure based on the first friction pair clearance of the target engine and a preset correspondence; the preset correspondence is obtained by performing fuel consumption tests on the test engine under different operating conditions; and an oil pressure control unit 140, used to control the oil pressure of the target engine based on the target oil pressure.

[0049] It is understood that the clearance determination unit 120 is specifically used for: determining the sub-clearance corresponding to each of the multiple historical operating conditions based on the historical operating condition and its historical operating duration; and determining the first friction pair clearance of the target engine based on the sub-clearance of each of the multiple historical operating conditions. Specifically, determining the first friction pair clearance of the target engine based on the sub-clearance of each of the multiple historical operating conditions includes: summing the sub-clearances of each of the multiple historical operating conditions as the first friction pair clearance of the target engine.

[0050] It is understood that the oil pressure determination unit 130 includes: a temperature acquisition subunit for acquiring the current oil temperature of the target engine; a correction subunit for correcting the first friction pair clearance of the target engine based on the current oil temperature to obtain the second friction pair clearance; and an oil pressure determination subunit for determining the target oil pressure based on the second friction pair clearance and a preset correspondence.

[0051] Understandably, the correction subunit is specifically used to: based on the current oil temperature, as well as the preset reference oil temperature, the coefficient of thermal expansion of the outer ring material of the target engine bearing, the outer ring diameter of the bearing, the coefficient of thermal expansion of the inner ring material of the bearing, and the inner ring diameter of the bearing, to correct the clearance of the first friction pair of the target engine, so as to obtain the clearance of the second friction pair.

[0052] It is understandable that the preset correspondence is the correspondence between the friction pair clearance and the oil pressure; the oil pressure determination subunit is specifically used to: input the second friction pair clearance into the preset correspondence to obtain the target oil pressure.

[0053] Understandably, the preset correspondence is the correspondence between operating conditions, oil temperature, friction pair clearance, and oil pressure; the oil pressure determination subunit is specifically used to: obtain the current operating conditions of the target engine; and input the current operating conditions, current oil temperature, and second friction pair clearance into the preset correspondence to obtain the target oil pressure.

[0054] It is understood that the engine oil pressure control device 10 also includes: a relationship establishment unit, used to establish a preset correspondence relationship, specifically including the following steps: acquiring multiple sets of test data, each set of test data including the test operating conditions of the test engine, the test oil temperature, and the test friction pair clearance; for each set of test data, controlling the test engine based on that set of test data to put the test engine in a test working state; in the test working state, controlling the test engine in time periods based on multiple preset test oil pressures to obtain the test oil consumption corresponding to each test oil pressure in the multiple test oil pressures; selecting the test oil pressure corresponding to the minimum test oil consumption among the test oil consumptions corresponding to each test oil pressure in the multiple test oil pressures as the optimal test oil pressure corresponding to that set of test data; obtaining the preset correspondence relationship based on multiple sets of test data and the optimal test oil pressure corresponding to each set of test data in the multiple sets of test data.

[0055] It should be understood that further implementation details of the engine oil pressure control device 10 in the embodiments of the present invention are described in the aforementioned engine oil pressure control method, and will not be repeated here for the sake of brevity.

[0056] Based on the same inventive concept, embodiments of the present invention also provide an electronic device, such as... Figure 3 As shown, it includes a memory 304, a processor 302, and a computer program stored in the memory 304 and executable on the processor 302. The processor 302 executes the program to implement the steps described in any embodiment of the oil pressure control method for the engine.

[0057] Among them, Figure 3 In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 305 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 can be used to store data used by processor 302 during operation.

[0058] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0059] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0060] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0061] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, 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. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0062] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for controlling oil pressure in an engine, characterized in that, include: During the operation of the target engine, multiple historical operating conditions of the target engine are acquired, as well as the historical operating duration of each of the multiple historical operating conditions. Based on the multiple historical operating conditions and the historical operating time of each of the multiple historical operating conditions, the first friction pair clearance of the target engine is determined. The target oil pressure is determined based on the first friction pair clearance of the target engine and the preset correspondence. The preset correspondence is obtained by testing the fuel consumption of the test engine under different operating conditions. Based on the target oil pressure, control the oil pressure of the target engine.

2. The oil pressure control method for an engine according to claim 1, characterized in that, The step of determining the first friction pair clearance of the target engine based on the multiple historical operating conditions and the historical operating duration of each of the multiple historical operating conditions includes: For each of the multiple historical operating conditions, the sub-gap corresponding to the historical operating condition is determined based on the historical operating condition and the historical operating duration of the historical operating condition. The first friction pair clearance of the target engine is determined based on the sub-clearance of each of the multiple historical operating conditions.

3. The oil pressure control method for an engine according to claim 2, characterized in that, The determination of the first friction pair clearance of the target engine based on the sub-clearance of each of the multiple historical operating conditions includes: The sum of the sub-clearances of each of the multiple historical operating conditions is taken as the first friction pair clearance of the target engine.

4. The oil pressure control method for an engine according to claim 1, characterized in that, The determination of the target oil pressure based on the first friction pair clearance of the target engine and a preset correspondence includes: Obtain the current oil temperature of the target engine; The first friction pair clearance of the target engine is corrected based on the current oil temperature to obtain the second friction pair clearance; The target oil pressure is determined based on the clearance of the second friction pair and the preset correspondence.

5. The oil pressure control method for an engine according to claim 4, characterized in that, The step of correcting the first friction pair clearance of the target engine based on the current oil temperature to obtain the second friction pair clearance includes: Based on the current oil temperature, as well as the preset reference oil temperature, the coefficient of thermal expansion of the bearing outer ring material, the bearing outer ring diameter, the coefficient of thermal expansion of the bearing inner ring material, and the bearing inner ring diameter of the target engine, the first friction pair clearance of the target engine is corrected to obtain the second friction pair clearance.

6. The oil pressure control method for an engine according to claim 4, characterized in that, The preset correspondence is the correspondence between the friction pair clearance and the oil pressure; The determination of the target oil pressure based on the second friction pair clearance and the preset correspondence includes: The second friction pair clearance is input into the preset correspondence to obtain the target oil pressure.

7. The oil pressure control method for an engine according to claim 4, characterized in that, The preset correspondence is the correspondence between operating conditions, oil temperature, friction pair clearance, and oil pressure; The determination of the target oil pressure based on the second friction pair clearance and the preset correspondence includes: Obtain the current operating condition of the target engine; The current operating condition, the current oil temperature, and the clearance of the second friction pair are input into the preset correspondence to obtain the target oil pressure.

8. The oil pressure control method for an engine according to claim 7, characterized in that, The preset correspondence is established through the following steps: Acquire multiple sets of test data, each set of test data including the test engine's test conditions, test oil temperature, and test friction pair clearance; For each set of test data in the multiple sets of test data, the test engine is controlled based on that set of test data to put the test engine into a test working state; In the test operation state, the test engine is controlled in time periods based on multiple preset test oil pressures to obtain the test oil consumption corresponding to each of the multiple test oil pressures; Among the multiple test oil pressures, the test oil pressure with the smallest test oil consumption is selected as the optimal test oil pressure for that set of test data. Based on the multiple sets of test data, and the optimal test oil pressure corresponding to each set of test data, the preset correspondence is obtained.

9. An oil pressure control device for an engine, characterized in that, include: The information acquisition unit is used to acquire multiple historical operating conditions of the target engine and the historical operating duration of each of the multiple historical operating conditions during the operation of the target engine. The clearance determination unit is used to determine the first friction pair clearance of the target engine based on the plurality of historical operating conditions and the historical operating time of each of the plurality of historical operating conditions; The oil pressure determination unit is used to determine the target oil pressure based on the first friction pair clearance of the target engine and a preset correspondence. The preset correspondence is obtained by testing the fuel consumption of the test engine under different operating conditions. The hydraulic pressure control unit is used to control the hydraulic pressure of the target engine based on the target hydraulic pressure.

10. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of any one of claims 1-8.

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