Engine oil pump, vehicle, and control method for engine oil pump of vehicle

Abstract

The application discloses an engine oil pump, an automobile and a control method of the engine oil pump, and relates to the technical field of automobiles, wherein the engine oil pump comprises an oil pan and an engine main oil passage, and further comprises an oil pump body, an oil inlet pipeline and an anti-blocking pressure relief oil passage; one end of the oil pump body is connected to the engine main oil passage; one end of the oil inlet pipeline is connected to an oil inlet of the oil pump body, and the other end is arranged corresponding to the bottom of the oil pan; the anti-blocking pressure relief oil passage comprises an electric control valve and a pressure relief pipe, and the electric control valve is arranged on the pressure relief pipe; the technical scheme of the application can control the opening degree of the electric control valve according to the actual conditions of oil temperature and oil pressure, thereby effectively improving the actual working efficiency of the oil pump and effectively reducing the energy consumption of the oil pump. Especially under the condition of extremely low temperature, the oil supply of the engine in the initial stage of operation is ensured, and the service life of the whole engine structure is improved.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and in particular to an engine oil pump, an automobile, and a control method for the engine oil pump. Background Technology

[0002] The engine uses an oil pump to deliver oil from the oil pan to various parts of the engine lubrication system. This provides lubrication and cleaning for friction pairs such as engine bearings, cools the engine pistons, and provides pressure to components like the VVT ​​(Variable Valve Timing) to drive VVT ​​angle adjustment. The proper functioning of the engine lubrication system affects engine reliability. The oil pump's suction chamber is connected to a suction plate assembly. The suction port at the end of the suction plate is immersed below the oil level in the oil pan, and the suction plate is equipped with a filter screen of a specific size (generally with small holes of about 0.8x0.8mm) to coarsely filter the oil drawn in by the oil pump. When vehicles frequently travel short distances in extremely cold regions, the engine oil temperature is low. Exhaust gases from engine combustion enter the crankcase through the piston rings, and the piston leakage contains a large amount of water vapor. This water vapor condenses into liquid water upon contact with the cold engine oil, entering the oil. Frequent short-distance travel in extremely cold regions leads to a continuous increase in the water content of the engine oil. Furthermore, the current usage scenarios for hybrid engines lead to more frequent engine start-stop cycles, resulting in a slower oil temperature rise and a faster increase in oil water content. For current hydrogen engines, combustion produces even more water vapor, causing a more significant increase in oil water content. When the oil in the engine oil pan has a high water content, the water in the oil can easily freeze when the vehicle is stationary in extremely cold regions. When the engine is started again, the frozen ice particles will gradually accumulate on the oil pump's suction screen. When a large amount of ice accumulates, it can clog the oil pump's suction screen, preventing the oil pump from drawing oil and ultimately damaging the engine. Summary of the Invention

[0003] The main objective of this invention is to propose an engine oil pump, a car, and a control method for the engine oil pump, aiming to solve the problem that when the water in the oil freezes at extremely low ambient temperatures, the frozen ice particles gradually accumulate on the oil pump's suction plate filter, causing the oil pump to fail to draw oil and easily damaging the engine.

[0004] To achieve the above objectives, the present invention provides an engine oil pump, comprising an oil pan and an engine main oil passage, and the engine oil pump further comprising:

[0005] The oil pump body is connected at one end to the engine's main oil passage;

[0006] An oil inlet pipe, one end of which is connected to the oil inlet of the oil pump body, and the other end which is disposed at the bottom of the oil pan; and,

[0007] The anti-blocking pressure relief oil circuit includes an electronically controlled valve and a pressure relief pipe. The electronically controlled valve is located on the pressure relief pipe. One end of the pressure relief pipe is connected to the pressure relief port of the oil pump body, and the other end of the pressure relief pipe is located corresponding to the oil inlet end of the oil inlet pipe.

[0008] In one embodiment, the oil inlet pipeline includes:

[0009] An oil inlet pipe is connected to the oil inlet of the oil pump body; and,

[0010] An oil suction structure includes an oil suction plate and a filter screen. The oil suction plate is located at one end of the oil inlet pipe corresponding to the bottom of the oil pan, and the filter screen is located at the downward end of the oil suction plate.

[0011] One end of the pressure relief pipe is positioned corresponding to the downward-facing end face of the filter screen.

[0012] In one embodiment, the oil inlet pipeline further includes an oil collecting component, which includes an oil collecting hole with a variable diameter. The oil collecting hole includes a first end with a smaller diameter and a second end with a larger diameter, and the first end is connected to the downward end of the oil suction plate.

[0013] One end of the pressure relief pipe is connected to the oil collection component and is in communication with the oil collection hole.

[0014] In one embodiment, the oil collecting component has a connection port on its arc-shaped sidewall. The connection port is located at one end of the oil collecting component, and its opening is tangential to the arc-shaped sidewall of the oil collecting hole. One end of the pressure relief pipe is connected to the other end of the connection port.

[0015] In one embodiment, the engine oil pump further includes an oil outlet pipe, which is used to connect the oil outlet end of the oil pump body and the main oil passage of the engine.

[0016] In one embodiment, the engine oil pump further includes a temperature sensor and a pressure sensor. The temperature sensor is connected to the oil pan to monitor the oil temperature, and the pressure sensor is located in the main oil passage of the engine to monitor the oil pressure in the main oil passage.

[0017] The present invention also proposes an automobile, including an engine oil pump, the engine oil pump including an oil pan and an engine main oil passage, and the engine oil pump further including:

[0018] The oil pump body is connected at one end to the engine's main oil passage;

[0019] An oil inlet pipe, one end of which is connected to the oil inlet of the oil pump body, and the other end which is disposed at the bottom of the oil pan; and,

[0020] The anti-blocking pressure relief oil circuit includes an electronically controlled valve and a pressure relief pipe. The electronically controlled valve is located on the pressure relief pipe. One end of the pressure relief pipe is connected to the pressure relief port of the oil pump body, and the other end of the pressure relief pipe is located corresponding to the oil inlet end of the oil inlet pipe.

[0021] The present invention also proposes a control method for an automotive engine oil pump. Based on the automotive described in the above embodiments, the control method for the automotive engine oil pump includes the following control steps:

[0022] Set the temperature threshold for the oil in the oil pan and the oil pressure threshold for the main oil passage of the engine;

[0023] After the engine is started, the oil temperature value of the oil pan and the real-time oil pressure value of the engine main oil passage are obtained.

[0024] The opening state of the electronically controlled valve is controlled based on the relationship between the oil temperature value in the oil pan and the temperature threshold, and the relationship between the real-time oil pressure value in the main oil passage of the engine and the oil pressure threshold.

[0025] In one embodiment, the step of "controlling the opening state of the electronically controlled valve based on the relationship between the oil temperature value in the oil pan and the temperature threshold, and the real-time oil pressure value in the main oil passage of the engine" includes:

[0026] When the oil temperature in the oil pan is lower than the temperature threshold, the electronic control valve is opened to a certain degree, and the relationship between the real-time oil pressure value of the engine main oil passage and the oil pressure threshold is obtained simultaneously to adjust the opening degree of the electronic control valve.

[0027] When the oil temperature in the oil pan is greater than the temperature threshold and the real-time oil pressure in the engine main oil passage is less than the oil pressure threshold, the electronically controlled valve closes.

[0028] When the oil temperature in the oil pan is greater than the temperature threshold and the real-time oil pressure in the engine main oil passage is greater than the oil pressure threshold, the electronically controlled valve opens.

[0029] In one embodiment, the step of "when the oil temperature in the oil pan is less than the temperature threshold, controlling the electronically controlled valve to open to a certain degree, and simultaneously acquiring the relationship between the real-time oil pressure value of the engine main oil passage and the oil pressure threshold, so as to adjust the opening degree of the electronically controlled valve" includes:

[0030] When the real-time oil pressure value of the engine main oil passage is less than the oil pressure threshold, the opening degree of the electronically controlled valve increases;

[0031] When the real-time oil pressure value of the engine main oil passage is greater than the oil pressure threshold, the opening degree of the electronically controlled valve decreases.

[0032] The technical solution of this invention improves the traditional engine oil pump structure, enabling the control of the electronically controlled valve opening based on actual oil temperature and pressure. This effectively enhances the actual working efficiency of the oil pump and reduces its energy consumption. Especially under extremely low temperature conditions, the electronically controlled valve can open simultaneously with the engine. While the oil pump body draws oil through the suction plate, it can simultaneously discharge a portion of the high-pressure oil to the inlet end of the inlet pipe through the pressure relief pipe. This effectively removes ice deposits from the end of the inlet pipe, ensuring sufficient oil supply during the initial engine operation at low temperatures and contributing to a longer service life for the entire engine structure. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of an embodiment of the engine oil pump provided by the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of CIMC oil fittings;

[0036] Figure 3 For based on including Figure 1 Flowchart of the control method for the oil pump in a car engine;

[0037] Figure 4 for Figure 3 Detailed control flowchart of the middle part of the control steps;

[0038] Figure 5 for Figure 4 The detailed control flowchart for the middle part of the control steps.

[0039] Explanation of icon numbers:

[0040] 100. Engine oil pump; 1. Oil pan; 2. Engine main oil passage; 3. Oil pump body; 4. Oil inlet pipe; 41. Oil inlet pipe; 42. Oil suction structure; 421. Oil suction plate; 422. Filter screen; 43. Oil collection component; 431. Oil collection hole; 432. Connection port; 5. Anti-clogging pressure relief oil circuit; 51. Electronic control valve; 52. Pressure relief pipe; 6. Oil outlet pipe.

[0041] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] 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.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0044] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are 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. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0045] When vehicles frequently travel short distances in extremely cold regions, the engine oil temperature drops significantly. Exhaust gases from combustion enter the crankcase through the piston rings, and the leaking gases contain a large amount of water vapor. This water vapor condenses into liquid water upon contact with the cold engine oil, further increasing the water content in the oil. Furthermore, the frequent start-stop cycles of hybrid engines result in even more frequent engine starts and stops, leading to a slower oil temperature rise and a faster increase in water content. For current hydrogen engines, the even greater amount of water vapor produced during combustion causes a more pronounced increase in oil water content. When the oil in the oil pan has a high water content, the water in the oil can easily freeze when the vehicle is stationary in extremely cold regions. Upon the next engine start, these ice particles gradually accumulate on the oil pump's suction screen. If too much ice accumulates, the oil pump will be unable to draw oil, ultimately damaging the engine.

[0046] This invention proposes an engine oil pump 100.

[0047] The engine oil pump 100 is primarily an improvement on the traditional pressure relief structure. The traditional engine oil pump structure has a filter screen on the suction plate to coarsely filter the oil in the oil pan. The suction plate is connected to the oil pump inlet via an inlet pipe, and the oil pump is connected to the engine main oil passage via an outlet pipe. A pressure relief valve is installed in the engine outlet chamber. When the pressure exceeds the opening pressure of the pressure relief valve, the valve opens, releasing excess oil and reducing the oil pump outlet pressure. When the engine starts, the crankshaft drives the oil pump. The oil pump suction port draws oil from the oil pan after it has been filtered by the suction plate filter screen and pumps it to the engine main oil passage. When the oil pump pumps excess oil, the oil pump outlet pressure becomes high. If this pressure exceeds the opening pressure of the pressure relief valve, the valve opens, and the excess oil is released into the oil pan, reducing the oil pressure at the oil pump outlet and in the engine main oil passage. Since pressure relief valves are generally used to release excess oil and reduce oil pressure when the oil pressure is high at low temperatures, they generally cannot open at high oil temperatures. Otherwise, releasing too much pressurized oil would increase the energy consumption of the oil pump. Therefore, the opening pressure of the pressure relief valve is set relatively high to ensure that the pressure relief valve opens at low temperatures and does not open at high oil temperatures (generally set to above 700 kPa).

[0048] At extremely low temperatures, water in the engine oil inside the oil pan freezes to form ice slag. Ice is denser than engine oil, and the ice slag is usually located at the bottom of the oil pan. When the engine starts, the crankshaft drives the oil pump to operate. The oil pump continuously draws engine oil from the oil pan through the oil suction plate. The ice slag in the oil pan is quickly drawn to the vicinity of the oil suction plate and accumulates on the oil suction plate filter screen. Eventually, the oil suction plate filter screen becomes clogged, causing the oil pump to be unable to draw engine oil, the pressure drops to 0, and the engine is damaged.

[0049] If a traditional pressure-controlled pressure relief valve is used, the pressure relief setting is relatively high, and it takes a certain amount of time for the pressure of the oil pumped out to exceed the opening pressure of the pressure relief valve before it can open. During this time, the oil pump suction plate may be blocked.

[0050] Please see Figures 1 to 2Considering the above problems, this embodiment mainly improves the pressure relief structure of the engine oil pump 100 by combining its existing structure. This allows the pump to automatically remove ice from the end of the oil inlet pipe 4 after the engine is started under extremely low temperatures, thus ensuring the pumping effect of the oil pump body 3 under these conditions. Specifically, in this embodiment, the traditional pressure relief valve is abandoned, and an electronically controlled valve 51 is used to actively control the pressure relief process. Under low-temperature conditions, the electronically controlled valve 51 is opened to a certain degree. At this time, the oil inlet pipe 4 introduces the engine oil from the oil pan 1 into the oil pump body 3. Part of the high-pressure oil pumped out by the oil pump body 3 flows through the oil pump outlet to the engine main oil passage 2, and part flows through the electronically controlled valve 51 and the pressure relief pipe 52 to the lower end face of the oil inlet pipe 4. At this time, the ice collected at the end of the oil inlet pipe 41 in the oil pan 1 is flushed away by the high-pressure oil discharged from the end of the pressure relief pipe 52, and the discharged oil is drawn back into the oil pump body 3. The above structure allows the electronically controlled valve 51 to open to a certain degree after the engine starts at low temperatures. A portion of the high-pressure oil pumped out by the oil pump body 3 is quickly sprayed through the pressure relief pipe 52 to the oil inlet end of the oil inlet pipe 4 (which has an oil suction structure 42). Large ice deposits at the bottom of the oil pan 1 cannot approach the end of the oil inlet pipe 4 under the high-pressure oil spray, thus preventing blockage of the oil suction structure 42 at the end of the oil inlet pipe 4. Furthermore, the sprayed high-pressure oil increases the pressure at the inlet of the oil inlet pipe 4, making the oil pump body 3 draw oil more smoothly and reducing the risk of oil pump cavitation at low temperatures. As the engine continues to run, the oil temperature gradually rises, and the ice deposits in the oil gradually melt.

[0051] The oil inlet pipe 4 specifically includes an oil inlet pipe 41 and an oil suction structure 42. The oil suction structure 42 includes an oil suction plate 421 and a filter screen 422. During installation, the filter screen 422 is located at the input end of the oil suction plate 421 and is used to filter solids in the engine oil. The filter pore size of the filter screen 422 is generally set to about 0.8 x 0.8 mm. In low-temperature environments, when the engine is actually running, the oil viscosity is higher due to the lower temperature, and the oil demand of the engine lubrication system is also lower (for example, at the idle speed of a certain engine, the oil flow rate requirement is 1L / min at -10℃ and 10L / min at 90℃). Under these conditions, when the engine first starts running, the oil suction plate 421 initially sucks in a small amount of oil, and at this time, there is also relatively little ice residue at the filter screen 422. If a traditional pressure relief valve is used, it takes a certain amount of time to reach the oil discharge state. As the engine runs, before the oil temperature rises, the ice residue at the filter screen 422 will gradually increase, so it is inevitable that ice residue will clog the filter screen 422, making it difficult for the oil suction plate 421 to suck in oil. The structure in this embodiment effectively solves the above problems. When the engine starts working, the electronic control valve 51 can open synchronously. When the initial oil demand is small, a portion of the high-pressure oil can be discharged to the filter screen 422 through the anti-clogging pressure relief pipe 5. The high-pressure oil flushes the filter screen 422, preventing ice slag from accumulating on the filter screen 422, thereby ensuring the continuous oil suction of the oil suction plate 421.

[0052] In another embodiment, an oil collecting element 43 is provided at one end of the oil inlet pipe 4. The oil collecting element 43 is funnel-shaped, and its inner side has an oil collecting hole 431 with a variable diameter. The first end with a smaller diameter hole is connected to the end of the oil suction plate 421 where the filter screen 422 is installed, and the second end with a larger diameter hole is located corresponding to the oil pan 1. Then, one end of the pressure relief pipe 52 is connected to the oil collecting element 43 and communicates with the oil collecting hole 431. With this configuration, the funnel-shaped oil collecting element 43 can guide the movement of some of the high-pressure oil discharged from the pressure relief pipe 52, so that the high-pressure oil can form a rotating vortex in the oil collecting element 43. This uses centrifugal force to throw the ice slag on the oil pan 1 corresponding to the second end to the circumferential outer side of the second end, thereby further reducing the adhesion rate of ice slag on the filter screen 422 during the oil suction process of the oil suction plate 421.

[0053] To enable the oil to form a vortex on the oil collecting component 43 more quickly, in this embodiment, a corresponding guiding structure is provided on the oil collecting component 43 to guide the oil discharged from the pressure relief pipe 52. Specifically, a connection port 432 is provided on the arc-shaped sidewall of the oil collecting component 43. The connection port 432 is located at one end inside the oil collecting component 43, and its opening is tangential to the arc-shaped sidewall of the oil collecting hole 431. The oil in the pressure relief pipe 52 enters from the end of the connection port 432 located outside the oil collecting component 43. When the oil is discharged onto the arc-shaped wall of the oil collecting hole 431, since the connection port 432 is tangential to its arc-shaped sidewall, the oil can flow better along the arc-shaped inner wall of the oil collecting hole 431. This allows for better formation of a vortex within the oil collecting component 43 and at the end of the oil collecting component 43 corresponding to the oil pan 1, thereby preventing ice slag on the outside of the oil collecting component 43 from accumulating at the oil collecting component 43 during the operation of the oil suction plate 421.

[0054] The oil pump body 3 is also provided with an oil outlet pipe 6 at its output end, and the oil pump body 3 is connected to the main oil passage of the engine through the oil outlet pipe 6.

[0055] In this embodiment, corresponding sensor elements are also provided for monitoring oil temperature and oil pressure. Specifically, a temperature sensor is provided on the oil pan 1 to obtain the real-time temperature of the engine oil in the oil pan 1, and a pressure sensor is provided in the main oil passage of the engine to obtain the real-time oil pressure value in the main oil passage 2 of the engine. During the entire operation of the engine oil pump 100, the above oil pressure and oil temperature values ​​can be monitored in real time, and the oil pressure and oil temperature information can be fed back to the control terminal. The control terminal can control the actual opening degree of the electronic control valve 51 to achieve precise regulation.

[0056] The present invention also discloses an automobile, which includes an engine oil pump 100. The specific structural scheme of the engine oil pump 100 refers to the relevant content in the above embodiments. Since the automobile applies all the technical solutions in the above embodiments, it has the relevant beneficial effects described in the above embodiments, which will not be repeated here.

[0057] This invention also discloses a control method for an automotive engine oil pump 100, which please refer to accordingly. Figures 1 to 5 The control method for the automotive engine oil pump 100 is based on an automotive vehicle, and the specific structural scheme of the vehicle refers to the implementation scheme of the aforementioned automotive vehicle. Because the control method for the automotive engine oil pump 100 is based on the aforementioned automotive vehicle, the control method for the automotive engine oil pump 100 possesses the relevant beneficial effects of the aforementioned automotive vehicle, which will not be elaborated upon here. The control method for the automotive engine oil pump 100 includes the following control steps:

[0058] Set the temperature threshold of the oil in the oil pan 1 and the oil pressure threshold of the main oil passage 2 of the engine;

[0059] First, it is necessary to set the temperature threshold of the bottom oil and the oil pressure threshold of the main oil passage 2 of the engine. Generally speaking, since oil freezing occurs under extremely low temperature conditions, the temperature threshold is set according to the low temperature conditions, for example, it is set to -10℃. As for the oil pressure threshold, since this solution uses an electronically controlled valve 51 to actively control the pressure relief process, the oil pressure threshold is relatively small, generally set at around 100kPa.

[0060] After the engine is started, the oil temperature value of the oil pan 1 and the real-time oil pressure value of the engine main oil passage 2 are obtained.

[0061] After the engine is started, the temperature of the oil in the oil pan 1 and the real-time oil pressure of the engine main oil passage 2 are obtained by the temperature sensor and the pressure sensor, respectively.

[0062] The opening state of the electronically controlled valve 51 is controlled according to the relationship between the oil temperature value of the oil pan 1 and the temperature threshold, and the relationship between the real-time oil pressure value of the engine main oil passage 2 and the oil pressure threshold.

[0063] The real-time oil temperature of the oil in the oil pan 1 is compared with the temperature threshold, and the real-time oil pressure of the engine main oil passage 2 is compared with the oil pressure threshold. Based on the comparison results, the opening of the electronic control valve 51 is controlled to regulate the amount of oil discharged from the pressure relief pipe 52 in real time, so that the amount of oil supplied to the engine main oil passage 2 and the amount of oil discharged from the pressure relief pipe 52 are kept in a dynamic balance as much as possible, thereby minimizing the energy consumption of the oil pump body 3.

[0064] The opening degree of the solenoid valve 51 is not constant. It needs to be compared with the actual oil temperature and oil pressure and the set threshold. In some cases, the opening degree of the solenoid valve 51 needs to be adjusted from small to large. In other cases, the opening degree of the solenoid valve 51 needs to be adjusted from large to small. In some cases, the solenoid valve 51 is in the closed state. Its specific action needs to be adjusted according to the actual oil temperature and oil pressure to achieve self-intelligent adjustment and keep the working efficiency of the oil pump body 3 at a high level.

[0065] The phrase "controlling the opening state of the electronically controlled valve 51 based on the relationship between the oil temperature value of the oil pan 1 and the temperature threshold, and the real-time oil pressure value of the engine main oil passage 2" includes:

[0066] When the oil temperature in the oil pan 1 is lower than the temperature threshold, the electronic control valve 51 is controlled to open to a certain degree, and the real-time oil pressure value of the engine main oil passage 2 and the relationship between the oil pressure threshold are obtained simultaneously to adjust the opening degree of the electronic control valve 51.

[0067] First, the oil temperature value of the oil pan 1 is compared with the temperature threshold. When the oil temperature value is lower than the temperature threshold, for example, below -10 degrees Celsius, ice slag forms on the engine pan. At this time, the electronic control valve 51 opens to a certain degree. Then, the real-time oil pressure value of the engine main oil passage 2 is compared with the oil pressure threshold. Based on the comparison result, the opening degree of the electronic control valve 51 is adjusted to increase or decrease.

[0068] When the oil temperature in the oil pan 1 is greater than the temperature threshold and the real-time oil pressure in the main oil passage 2 is less than the oil pressure threshold, the electronic control valve 51 closes.

[0069] When the oil temperature in the oil pan 1 is greater than the temperature threshold, it is determined that there is less ice on the oil pan 1. Then there are two situations: the first is that the real-time oil pressure in the main oil passage 2 of the engine is less than the oil pressure threshold. In this case, the oil pump body 3 needs to continuously pump oil into the main oil passage 2 of the engine. At this time, in order to improve the pumping efficiency of the oil, the electronic control valve 51 is set to the closed state, thereby improving the pumping effect of the oil.

[0070] When the oil temperature in the oil pan 1 is greater than the temperature threshold and the real-time oil pressure in the main oil passage 2 of the engine is greater than the oil pressure threshold, the electronic control valve 51 opens.

[0071] Meanwhile, when the oil temperature in the oil pan 1 is greater than the temperature threshold, there is another situation: when the real-time oil pressure in the engine main oil passage 2 is greater than the oil pressure threshold, the electronic control valve 51 needs to be opened to its maximum extent to release pressure in time and prevent the lubrication system from leaking oil due to excessively high oil pressure in the engine main oil passage 2.

[0072] When the engine oil pump 100 is operating, it is first necessary to determine the relationship between the oil temperature value of the oil pan 1 and the temperature threshold. When the oil temperature value of the oil pan 1 is lower than the temperature threshold, that is, when the oil temperature inside the oil pan 1 is low and there is a lot of ice, the electronic control valve 51 needs to start working simultaneously with the engine and open to a certain degree so that the oil pump body 3 can reduce the accumulation of ice at the oil collecting part 43 through the above method, allowing the oil suction plate 421 to maintain a good working condition. When the oil temperature value of the oil pan 1 is higher than the temperature threshold, the water in the oil inside the oil pan 1 has not yet formed a lot of ice. At this time, the normal oil suction operation of the oil suction plate 421 can be guaranteed. At this time, the main focus is on ensuring the pumping efficiency of the oil pump body 3, so the electronic control valve 51 will be closed to keep the oil pump body 3 in a high-efficiency pumping state. When the real-time oil pressure value of the engine main oil passage 2 is greater than the oil pressure threshold, it is determined that the pumping volume of the oil pump body 3 is in an excessive state. At this time, the electronic control valve 51 will open to release the pressure of the engine main oil passage 2.

[0073] The phrase "when the oil temperature of the oil pan 1 is less than the temperature threshold, control the electronically controlled valve 51 to open to a certain degree, and simultaneously acquire the real-time oil pressure value of the engine main oil passage 2 and the relationship between the oil pressure threshold, so as to adjust the opening degree of the electronically controlled valve 51" includes:

[0074] When the real-time oil pressure value of the engine main oil passage 2 is less than the oil pressure threshold, the opening degree of the electronically controlled valve 51 increases;

[0075] When the real-time oil pressure value of the engine main oil passage 2 is greater than the oil pressure threshold, the opening degree of the electronically controlled valve 51 decreases.

[0076] When the engine starts, the oil temperature in the oil pan 1 is monitored. When the oil temperature in the oil pan 1 is lower than the temperature threshold, the oil temperature is low and water in the oil is prone to freezing. The electronic control valve 51 opens to a certain degree, and part of the high-pressure oil in the oil pump body 3 goes to the main oil passage 2 of the engine through the oil pump outlet. Part of the oil is discharged to the filter screen 422 through the electronic control valve 51 and the pressure relief pipe 52. The ice slag from the bottom of the oil pan 1 is washed away by the high-pressure oil, and the discharged oil re-enters the oil pump suction plate 421 and is sucked up by the oil pump. Furthermore, when the temperature is below the aforementioned temperature threshold, the oil viscosity is higher, and the engine lubrication system requires less oil. In this case, the electronic control valve 51 can be opened to an initial degree of approximately 10%. Then, the opening degree of the electronic control valve 51 is controlled based on the oil pressure feedback from the pressure sensor of the engine main oil passage 2. For example, when the oil pressure of the engine main oil passage 2 is greater than the aforementioned oil pressure threshold, the opening degree of the electronic control valve 51 is reduced; when the oil pressure of the engine main oil passage 2 is less than the aforementioned oil pressure threshold, the opening degree of the electronic control valve 51 is increased. When the temperature is below the threshold, the oil viscosity is high, and the engine lubrication system requires less oil. At this time, the amount of oil pumped out by the oil pump is definitely excessive. When the filter screen is not blocked, the oil pressure in the main oil passage will definitely exceed the oil pressure threshold. Therefore, when the oil pressure in the engine main oil passage 2 is greater than the oil pressure threshold, it means that the filter screen 422 is not blocked. The opening of the electronic control valve 51 can be reduced (reducing the opening of the electronic control valve can increase the oil pressure in the main oil passage. Appropriately increasing the oil pressure in the main oil passage can speed up the oil pressure build-up time during startup, but it is also necessary to ensure that the oil pressure does not exceed the pressure limit, thereby causing oil leakage). When the oil pressure in the engine main oil passage 2 is less than the oil pressure threshold, it means that the filter screen 422 is blocked. The opening of the electronic control valve 51 needs to be increased to increase the flushing effect on the ice slag on the filter screen 422. When the temperature is low, the electronically controlled valve 51 is adjusted in real time using the above method. As the engine continues to run, the temperature of the oil in the oil pan 1 gradually increases, and the ice in the oil slowly melts. When the real-time temperature of the oil in the oil pan 1 is greater than the temperature threshold, the control method described above, "when the oil temperature in the oil pan 1 is greater than the temperature threshold," is switched to control the electronically controlled valve 51. In summary, the control method of the electronically controlled valve 51 proposed in this solution is a continuous monitoring process that automatically switches according to the actual situation. This effectively solves the problem that the oil pump body 3 has difficulty pumping oil when the temperature is extremely low. Furthermore, the above control method effectively ensures the high efficiency of the oil pump body 3, and has excellent application value.

[0077] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An engine oil pump, comprising an oil pan and a main engine oil passage, characterized in that, The engine oil pump also includes: The oil pump body is connected at one end to the engine's main oil passage; An oil inlet pipe, one end of which is connected to the oil inlet of the oil pump body, and the other end which is disposed at the bottom of the oil pan; and, The anti-blocking pressure relief oil circuit includes an electronically controlled valve and a pressure relief pipe. The electronically controlled valve is installed on the pressure relief pipe. One end of the pressure relief pipe is connected to the pressure relief port of the oil pump body, and the other end of the pressure relief pipe is set corresponding to the oil inlet end of the oil inlet pipe. The oil inlet pipeline includes: An oil inlet pipe is connected to the oil inlet of the oil pump body; and, An oil suction structure includes an oil suction plate and a filter screen. The oil suction plate is located at one end of the oil inlet pipe corresponding to the bottom of the oil pan, and the filter screen is located at the downward end of the oil suction plate. One end of the pressure relief pipe is positioned corresponding to the downward-facing end face of the filter screen; The oil inlet pipeline also includes an oil collecting component, which includes an oil collecting hole with a variable diameter. The oil collecting hole includes a first end with a smaller diameter and a second end with a larger diameter. The first end is connected to the downward end of the oil suction plate. One end of the pressure relief pipe is connected to the oil collection component and is in communication with the oil collection hole; The oil collecting component has a connection port on its arc-shaped sidewall. The connection port is located at one end inside the oil collecting component, and its opening is tangential to the arc-shaped sidewall of the oil collecting hole. One end of the pressure relief pipe is connected to the other end of the connection port.

2. The engine oil pump as described in claim 1, characterized in that, The engine oil pump also includes an oil outlet pipe, which is used to connect the oil outlet end of the oil pump body to the main oil passage of the engine.

3. The engine oil pump as described in claim 1, characterized in that, The engine oil pump also includes a temperature sensor and a pressure sensor. The temperature sensor is connected to the oil pan to monitor the oil temperature, and the pressure sensor is located in the main oil passage of the engine to monitor the oil pressure in the main oil passage.

4. A car, characterized in that, Including the engine oil pump as described in any one of claims 1-3.

5. A control method for an oil pump in an automobile engine, based on the automobile described in claim 4, characterized in that, The control method for the automobile engine oil pump includes the following control steps: Set the temperature threshold for the oil in the oil pan and the oil pressure threshold for the main oil passage of the engine; After the engine is started, the oil temperature value of the oil pan and the real-time oil pressure value of the engine main oil passage are obtained. The opening state of the electronically controlled valve is controlled based on the relationship between the oil temperature value in the oil pan and the temperature threshold, and the relationship between the real-time oil pressure value in the main oil passage of the engine and the oil pressure threshold.

6. The control method for an automotive engine oil pump as described in claim 5, characterized in that, The phrase "controlling the opening state of the electronically controlled valve based on the relationship between the oil temperature value in the oil pan and the temperature threshold, and the real-time oil pressure value in the engine main oil passage" includes: When the oil temperature in the oil pan is lower than the temperature threshold, the electronic control valve is opened to a certain degree, and the relationship between the real-time oil pressure value of the engine main oil passage and the oil pressure threshold is obtained simultaneously to adjust the opening degree of the electronic control valve. When the oil temperature in the oil pan is greater than the temperature threshold and the real-time oil pressure in the engine main oil passage is less than the oil pressure threshold, the electronically controlled valve closes. When the oil temperature in the oil pan is greater than the temperature threshold and the real-time oil pressure in the engine main oil passage is greater than the oil pressure threshold, the electronically controlled valve opens.

7. The control method for an automotive engine oil pump as described in claim 6, characterized in that, The phrase "when the oil temperature in the oil pan is less than the temperature threshold, control the electronically controlled valve to open to a certain degree, and simultaneously acquire the real-time oil pressure value of the engine main oil passage and the relationship with the oil pressure threshold, so as to adjust the opening degree of the electronically controlled valve" includes: When the real-time oil pressure value of the engine main oil passage is less than the oil pressure threshold, the opening degree of the electronically controlled valve increases; When the real-time oil pressure value of the engine main oil passage is greater than the oil pressure threshold, the opening degree of the electronically controlled valve decreases.

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