Engine oil pump, automobile and control method of automobile engine oil pump

Abstract

The invention discloses an engine oil pump, an automobile and a control method of the engine oil pump, and relates to the technical field of automobiles, the engine oil pump comprises an oil pan and an engine main oil duct, the engine oil pump further comprises an oil pump body, an oil inlet pipeline and an anti-blocking pressure relief oil way, and one end of the oil pump body is connected to the engine main oil duct; one end of the oil inlet pipeline is connected to an oil inlet of the oil pump body, the other end of the oil inlet pipeline corresponds to the bottom of an oil pan, the anti-blocking pressure relief oil way comprises an electric control valve and a pressure relief pipe, and the electric control valve is arranged on the pressure relief pipe; according to the technical scheme, the opening degree condition of the electric control valve can be controlled according to the actual conditions of the oil temperature and the oil pressure, so that the actual working efficiency of the oil pump is effectively improved, and the energy consumption of the oil pump can be effectively reduced. Particularly, under the condition of extremely low temperature, supply of engine oil in the initial operation stage of the engine is guaranteed, and the service life of the whole engine structure is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of automobiles, and in particular to an engine oil pump, an automobile, and a control method for an automobile engine oil pump. Background Art

[0002] The engine pumps the oil in the oil pan to various positions of the engine lubrication system through the oil pump. It provides lubrication and cleaning for friction parts such as engine bearings, cools the engine pistons, and provides pressure for components such as VVT to drive VVT ​​angle adjustment. Whether the engine lubrication system can work normally affects the reliability of the engine. The oil pump suction chamber is connected to an oil suction plate component. The oil suction port at the end of the oil suction plate is immersed below the oil level of the oil pan, and a filter of a certain specification is arranged on the oil suction plate (generally with a small hole of about 0.8x0.8mm) to coarsely filter the oil sucked in by the oil pump. When the vehicle frequently travels short distances in extremely cold areas, the engine oil temperature is low due to short-distance travel in extremely cold areas. The exhaust gas generated by engine combustion enters the crankcase through the piston ring, and the piston leakage contains a large amount of water vapor. After the water vapor encounters the cold oil, it condenses into liquid water and enters the oil; frequent short-distance travel in extremely cold areas leads to a continuous increase in the water content in the oil. In addition, the current use scenarios of hybrid engines cause the engine to start and stop more frequently, the oil temperature rises more slowly, and the water content in the oil increases faster. For current hydrogen engines, the combustion produces more water vapor, and the increase in water content in the oil is more obvious. When the water content in the engine oil pan is high, it is easy for the water in the oil to freeze when the vehicle is stationary in extremely cold areas. When the engine is started next time, the frozen ice particles will gradually gather on the oil pump suction pan filter. When more ice gathers, the oil pump suction pan filter will be blocked by ice, causing the oil pump to be unable to suck up oil, and eventually causing engine damage. Summary of the invention

[0003] The main purpose of the present invention is to propose an engine oil pump, an automobile and a control method for an automobile engine oil pump, aiming to solve the problem that at extremely low ambient temperatures, water in the oil freezes, and the frozen ice particles gradually gather on the oil pump suction pan filter, causing the oil pump to be unable to suck up the oil, which can easily damage the engine.

[0004] To achieve the above-mentioned purpose, the engine oil pump proposed in the present invention comprises an oil pan and an engine main oil channel, and the engine oil pump further comprises:

[0005] An oil pump body, one end of which is connected to the main oil channel of the engine;

[0006] An oil inlet pipeline, one end of which is connected to the oil inlet of the oil pump body, and the other end of which is arranged corresponding to the bottom of the oil pan; and

[0007] The anti-blocking pressure relief oil circuit includes an electric control valve and a pressure relief pipe, wherein the electric control valve is arranged 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 arranged corresponding to the oil inlet end of the oil inlet pipeline.

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

[0009] an oil inlet pipe connected to the oil inlet of the oil pump body; and

[0010] The oil suction structure comprises an oil suction plate and a filter screen, wherein the oil suction plate is arranged at one end of the oil inlet pipe corresponding to the bottom of the oil pan, and the filter screen is arranged at one end of the oil suction plate facing downward;

[0011] One end of the pressure relief pipe is arranged corresponding to the downward end surface of the filter screen.

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

[0013] One end of the pressure relief pipe is connected to the oil collecting member and communicates with the oil collecting hole.

[0014] In one embodiment, a connecting port is provided on the arcuate side wall of the oil collecting member, the connecting port is located at one end inside the oil collecting member, the opening is arranged tangent to the arcuate side wall of the oil collecting hole, and one end of the pressure relief pipe is connected to the other end of the connecting port.

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

[0016] In one embodiment, the engine oil pump further includes a temperature sensor and a pressure sensor, wherein the temperature sensor is connected to the oil pan for monitoring the oil temperature, and the pressure sensor is disposed in the main oil channel of the engine for monitoring the oil pressure in the main oil channel of the engine.

[0017] The present invention further provides an automobile, comprising an engine oil pump, wherein the engine oil pump comprises an oil pan and an engine main oil channel, and the engine oil pump further comprises:

[0018] An oil pump body, one end of which is connected to the main oil channel of the engine;

[0019] An oil inlet pipeline, one end of which is connected to the oil inlet of the oil pump body, and the other end of which is arranged corresponding to the bottom of the oil pan; and

[0020] The anti-blocking pressure relief oil circuit includes an electric control valve and a pressure relief pipe, wherein the electric control valve is arranged 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 arranged corresponding to the oil inlet end of the oil inlet pipeline.

[0021] The present invention further proposes a method for controlling an automobile engine oil pump. Based on the automobile as described in the above embodiment, the method for controlling an automobile engine oil pump comprises the following control steps:

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

[0023] After the engine is started, obtaining the oil temperature value of the oil pan and the real-time oil pressure value of the main oil channel of the engine;

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

[0025] In one embodiment, the “controlling the opening state of the electronically controlled valve according to the relationship between the oil temperature value of the oil pan and the temperature threshold value, and the real-time oil pressure value of the main oil gallery of the engine” includes:

[0026] When the oil temperature value of the oil pan is less than the temperature threshold, the electronically controlled valve is controlled to open to a certain degree, and the relationship between the real-time oil pressure value and the oil pressure threshold value of the main oil channel of the engine is simultaneously obtained to adjust the opening degree of the electronically controlled valve;

[0027] When the oil temperature of the oil pan is greater than the temperature threshold, and the real-time oil pressure of the main oil channel of the engine is less than the oil pressure threshold, the electric control valve is closed;

[0028] When the oil temperature value of the oil pan is greater than the temperature threshold, and the real-time oil pressure value of the main oil channel of the engine is greater than the oil pressure threshold, the electronically controlled valve is opened.

[0029] In one embodiment, the “when the oil temperature value of the oil pan is less than the temperature threshold, controlling the electronically controlled valve to open a certain opening, and synchronously obtaining the relationship between the real-time oil pressure value and the oil pressure threshold of the main oil channel of the engine to adjust the opening degree of the electronically controlled valve” includes:

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

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

[0032] The technical solution of the present invention improves the traditional engine oil pump structure and can control the opening of the electric control valve according to the actual oil temperature and oil pressure, thereby effectively improving the actual working efficiency of the oil pump and effectively reducing its energy consumption. Especially under extremely low temperature conditions, the electric control valve can be opened at the same time as the engine, and the oil pump body can simultaneously discharge part of the high-pressure oil to the oil inlet end of the oil inlet pipeline through the pressure relief pipe while absorbing the oil through the oil suction plate, thereby removing ice residues at the end of the oil inlet pipeline as much as possible, ensuring the supply of oil in the early stage of engine operation at low temperatures, and helping to increase the service life of the entire engine structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0034] Figure 1 A schematic structural diagram of an embodiment of an engine oil pump provided by the present invention;

[0035] Figure 2 for Figure 1 Schematic diagram of the structure of the oil collection parts;

[0036] Figure 3 Based on including Figure 1 A flow chart of a method for controlling an engine oil pump of an automobile having an engine oil pump;

[0037] Figure 4 for Figure 3 Specific control flow chart of some control steps in the middle;

[0038] Figure 5 for Figure 4 Specific control flow chart of some control steps in the figure.

[0039] Description of Figure Numbers:

[0040] 100. Engine oil pump; 1. Oil pan; 2. Engine main oil channel; 3. Oil pump body; 4. Oil inlet pipeline; 41. Oil inlet pipe; 42. Oil suction structure; 421. Oil suction plate; 422. Filter; 43. Oil collecting part; 431. Oil collecting hole; 432. Connecting port; 5. Anti-blocking pressure relief oil circuit; 51. Electric control valve; 52. Pressure relief pipe; 6. Oil outlet pipe.

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

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] When vehicles frequently travel short distances in extremely cold areas, the engine oil temperature is low due to short-distance travel in extremely cold areas. The exhaust gas generated by engine combustion enters the crankcase through the piston ring, and the piston leakage contains a large amount of water vapor. After the water vapor encounters the cold oil, it condenses into liquid water and enters the oil; frequent short-distance travel in extremely cold areas causes the water content in the oil to increase continuously. In addition, the current hybrid engine usage scenario causes the engine to start and stop more frequently, the oil temperature rises more slowly, and the water content in the oil increases faster. For current hydrogen engines, the water vapor generated by combustion is more, and the increase in water content in the oil is more obvious. When the oil in the engine oil pan has a large amount of water content, it is easy to cause the water in the oil to freeze when the vehicle is stationary in an extremely cold area. When the engine is started next time, the frozen ice particles will gradually gather on the oil pump suction plate filter. When more ice gathers, the oil pump suction plate filter will be blocked by ice, causing the oil pump to be unable to absorb oil, and eventually causing engine damage.

[0046] The present invention provides an engine oil pump 100 .

[0047] The engine oil pump 100 is mainly improved on the traditional pressure relief structure. The traditional engine oil pump structure has a filter screen on the oil suction plate to coarsely filter the oil in the oil pan. The oil suction plate is connected to the oil inlet of the oil pump through an oil inlet pipe. The oil pump is connected to the oil pump outlet to the main oil channel of the engine through an oil outlet pipe. A pressure relief valve is provided in the engine oil outlet cavity. When the pressure exceeds the opening pressure of the pressure relief valve, the pressure relief valve opens to discharge excess oil and reduce the pressure of the oil pump outlet. When the engine is started, the crankshaft drives the oil pump to operate. The oil pump suction port extracts the oil in the oil pan filtered by the oil suction plate filter and pumps it to the main oil channel of the engine. When the oil pump pumps excessive oil, it will cause the oil pump outlet pressure to be high. After exceeding the opening pressure of the pressure relief valve, the pressure relief valve opens, and the excess oil is discharged to the oil pan through the pressure relief valve, reducing the oil pressure of the oil pump outlet and the main oil channel of the engine. Since the pressure relief valve is generally used to release excess oil when the oil pressure is high at low temperatures to reduce the oil pressure, the pressure relief valve generally cannot be opened at high oil temperatures, otherwise the release of more pressurized oil will cause the oil pump energy consumption to increase. Therefore, the opening pressure of the pressure relief valve is set to a larger value to ensure that the pressure relief valve opens at low temperatures and does not open at high oil temperatures (generally set to above 700kPa).

[0048] Under extremely low temperatures, the water in the oil in the oil pan freezes to form ice debris. The density of ice is greater than the density of oil. The ice debris is generally at the bottom of the oil pan. When the engine is started, the crankshaft drives the oil pump to operate. The oil pump continuously sucks the oil in the oil pan through the oil suction plate. The ice debris in the oil in the oil pan is quickly sucked around the oil suction plate and gathered on the oil suction plate filter, eventually causing the oil suction plate filter to be blocked, resulting in the oil pump being unable to suck up the oil, the pressure drops to 0, and causing engine damage.

[0049] If a traditional pressure-controlled pressure relief valve is used, the pressure relief pressure is set relatively high and it is necessary to wait for a certain period of time until the oil pressure pumped out by the oil pump exceeds the opening pressure of the pressure relief valve before the pressure relief valve can open. During this period of time, the oil pump suction pan may have been blocked.

[0050] See also Figure 1 to Figure 2In view of the above problems, in this embodiment, the pressure relief structure of the engine oil pump 100 is improved by combining the existing structure thereof, so as to utilize its own working effect to automatically remove ice debris from the end of the oil inlet pipe 4 after the engine is turned on under extremely low temperature conditions, thereby ensuring the pumping effect of the oil pump body 3 under extremely low temperature conditions. Specifically, in this embodiment, the traditional pressure relief valve is abandoned, and the electric control valve 51 is used to actively control the pressure relief process. When the low temperature condition is reached, the electric control valve 51 is controlled to open to a certain degree. At this time, the oil inlet pipe 4 guides the oil in the oil pan 1 into the oil pump body 3. A part of the high-pressure oil pumped out of the oil pump body 3 passes through the oil pump outlet to the main oil gallery 2 of the engine, and a part of it is discharged to the end face of the lower end of the oil inlet pipe 4 through the electric control valve 51 and the pressure relief pipe 52. At this time, the ice debris collected at the end of the oil inlet pipe 41 of the oil pan 1 will be washed away by the high-pressure oil discharged from the end of the pressure relief pipe 52, and the leaked oil will be sucked into the oil pump body 3 again. The above structure is set up so that the electric control valve 51 can be opened to a certain degree after the engine is started at low temperature, and part of the high-pressure oil pumped out by the oil pump body 3 is quickly sprayed to the oil inlet end of the oil inlet pipeline 4 through the pressure relief pipe 52 (the oil inlet end is provided with an oil suction structure 42). The large pieces of ice debris at the bottom of the oil pan 1 cannot approach the end of the oil inlet pipeline 4 under the high-pressure oil spray, thereby avoiding the blockage of the oil suction structure 42 at the end of the oil inlet pipeline 4. In addition, the sprayed high-pressure oil increases the pressure at the inlet of the oil inlet pipeline 4, and the oil pump body 3 sucks oil more smoothly, reducing the risk of cavitation of the oil pump at low temperatures. Then, as the engine continues to run, the oil temperature gradually rises, and the ice debris in the oil will gradually melt.

[0051] The oil inlet pipeline 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 422. During installation, the filter 422 is arranged at the input end of the oil suction plate 421 to filter solid matter in the engine oil. The filter aperture of the filter 422 is generally set to about 0.8x0.8mm. In a low temperature environment, when the actual engine is working, the viscosity of the oil is greater when the temperature is low, and the engine lubrication system oil demand is also less (for example, at an engine idle speed, the oil flow demand is 1L / min at -10°C, and the oil flow demand is 10L / min at 90°C). In this state, when the engine just starts to work, the oil suction plate 421 absorbs less oil when it just starts to absorb oil. At this time, there is relatively little ice debris at the position of the filter 422. If a traditional pressure relief valve is used, it will take a certain amount of time for it to reach the oil leakage state. As the engine works, before the oil temperature rises, the ice debris at the filter 422 will gradually increase. Therefore, it is inevitable that ice debris will block the filter 422, making it difficult for the oil suction plate 421 to absorb oil. The structure in this embodiment solves the above problem very well. When the engine just starts to work, the electronically controlled valve 51 can be opened synchronously. When the initial oil demand is small, a part of the high-pressure oil can be discharged to the filter 422 through the anti-blocking pressure relief pipe 5. The filter 422 is flushed with high-pressure oil to prevent ice debris from gathering on the filter 422, thereby ensuring that the oil suction plate 421 can continuously absorb oil.

[0052] In another embodiment, an oil collecting member 43 is further provided at one end of the oil inlet pipeline 4. The oil collecting member 43 is arranged in a trumpet shape, and an oil collecting hole 431 with a variable aperture is arranged inside the oil collecting member 43. The first end with a smaller aperture is connected to the end of the oil suction plate 421 on which the filter screen 422 is installed, and the second end with a larger aperture is arranged corresponding to the oil pan 1. Then, one end of the pressure relief pipe 52 is connected to the oil collecting member 43 and communicates with the oil collecting hole 431. After such arrangement, the trumpet-shaped oil collecting member 43 can be used to guide the movement of part 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 member 43, so that the ice debris on the oil pan 1 corresponding to the second end is thrown to the circumferential outer side of the second end by centrifugal force, thereby further reducing the adhesion rate of ice debris on the filter screen 422 during the oil suction process of the oil suction plate 421.

[0053] In order to enable the engine oil to form an eddy flow on the oil collecting piece 43 more quickly, in the present embodiment, a corresponding guide structure is provided on the oil collecting piece 43 to guide the engine oil discharged from the pressure relief pipe 52. Specifically, a connecting port 432 is provided on the arc-shaped side wall of the oil collecting piece 43. The connecting port 432 is located at one end inside the oil collecting piece 43, and the opening is tangent to the arc-shaped side wall of the oil collecting hole 431. The engine oil in the pressure relief pipe 52 enters from the end of the connecting port 432 located on the outside of the oil collecting piece 43. When the engine oil is discharged to the arc-shaped wall of the oil collecting hole 431, since the connecting port 432 is tangent to its arc-shaped side wall, the engine oil can flow better along the arc-shaped inner wall of the oil collecting hole 431, so that an eddy flow can be better formed in the oil collecting piece 43 and at the end of the oil collecting piece 43 corresponding to the oil pan 1, so as to avoid the ice debris outside the oil collecting piece 43 from gathering at the oil collecting piece 43 during the operation of the oil suction plate 421.

[0054] An oil outlet pipe 6 is also provided on the output end of the oil pump body 3 , and the oil pump body 3 is connected to the main oil channel of the engine through the oil outlet pipe 6 .

[0055] In this embodiment, corresponding sensor elements are also provided for monitoring the oil temperature and oil pressure. Specifically, a temperature sensor is provided on the oil pan 1 for obtaining the real-time temperature of the oil in the oil pan 1, and a pressure sensor is provided in the main oil channel of the engine for obtaining the real-time oil pressure value in the main oil channel 2 of the engine. During the use of the entire 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, and the actual opening size of the electric control valve 51 can be controlled through the control terminal to achieve precise regulation.

[0056] The present invention also discloses a car, which includes an engine oil pump 100. The specific structural scheme of the engine oil pump 100 refers to the relevant contents in the above-mentioned embodiments. Because the car applies all the technical solutions in the above-mentioned embodiments, it has the relevant beneficial effects described in the above-mentioned embodiments, which will not be repeated here one by one.

[0057] The present invention also discloses a control method for an automobile engine oil pump 100, please refer to Figures 1 to 5 The control method of the automobile engine oil pump 100 is based on an automobile. The specific structural scheme of the automobile refers to the implementation scheme of the above automobile. Because the control method of the automobile engine oil pump 100 is based on the above automobile, the control method of the automobile engine oil pump 100 has the relevant beneficial effects of the above automobile, which will not be described one by one here. Among them, the control method of the automobile engine oil pump 100 includes the following control steps:

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

[0059] First, it is necessary to set the temperature threshold of the sump oil and the oil pressure threshold of the engine main oil channel 2. Generally speaking, because oil freezing occurs under extremely low temperature conditions, the temperature threshold is set according to the low temperature conditions, for example, at -10°C. For the oil pressure threshold, because the electric control valve 51 is used in this solution to actively control the pressure relief process, the oil pressure threshold is relatively small, generally set at around 100 kPa.

[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 channel 2 are obtained;

[0061] After the engine is started, the temperature sensor and the pressure sensor are used to obtain the oil temperature of the oil pan 1 and the real-time oil pressure value of the main oil gallery 2 of the engine, respectively.

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

[0063] The real-time oil temperature of the oil in the oil pan 1 is compared with the temperature threshold value. At the same time, the real-time oil pressure value of the engine main oil channel 2 is compared with the oil pressure threshold value. According to the comparison result, the opening of the electric control valve 51 is controlled, so as to adjust 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 channel 2 and the amount of oil discharged from the pressure relief pipe 52 are in a state of dynamic balance as much as possible, so as to reduce the energy consumption of the oil pump body 3 as much as possible.

[0064] The degree of opening of the electric control valve 51 is not certain, and it needs to be compared with the set threshold value based on the actual oil temperature and oil pressure. In some cases, the opening of the electric control valve 51 needs to be adjusted from small to large, and in some cases, the opening of the electric control valve 51 needs to be adjusted from large to small. In some cases, the electric control valve 51 is in a closed state. Its specific action needs to be regulated according to the actual oil temperature and oil pressure, so as to realize self-intelligent regulation and keep the working efficiency of the oil pump body 3 at a high level.

[0065] Wherein, the “controlling the opening state of the electronically controlled valve 51 according to the relationship between the oil temperature value of the oil pan 1 and the temperature threshold value, and the real-time oil pressure value of the engine main oil gallery 2” includes:

[0066] When the oil temperature of the oil pan 1 is less than the temperature threshold, the electronically controlled valve 51 is controlled to open to a certain degree, and the relationship between the real-time oil pressure value and the oil pressure threshold of the main oil channel 2 of the engine is simultaneously obtained to adjust the opening degree of the electronically controlled 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, lower than -10 degrees Celsius, ice debris is formed on the engine pan. At this time, the electric control valve 51 is opened to a certain degree. Then, the real-time oil pressure value of the engine main oil channel 2 is compared with the oil pressure threshold. According to the comparison result, the opening of the electric control valve 51 is adjusted to increase or decrease.

[0068] When the oil temperature of the oil pan 1 is greater than the temperature threshold, and the real-time oil pressure of the engine main oil gallery 2 is less than the oil pressure threshold, the electric control valve 51 is closed;

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

[0070] When the oil temperature of the oil pan 1 is greater than the temperature threshold, and the real-time oil pressure of the engine main oil gallery 2 is greater than the oil pressure threshold, the electric control valve 51 is opened;

[0071] At the same time, when the oil temperature value of the oil pan 1 is greater than the temperature threshold, there is another situation, that is, when the real-time oil pressure value of the engine main oil channel 2 is greater than the oil pressure threshold, it is necessary to open the electric control valve 51 to the maximum opening to perform timely pressure relief processing to avoid excessive oil pressure in the engine main oil channel 2 causing oil leakage in the lubrication system.

[0072] When the engine oil pump 100 is working, 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 less than the temperature threshold, that is, when the oil collection temperature inside the oil pan 1 is low and there are more ice debris, the electric control valve 51 needs to start working at the same time as the engine and open a certain degree of opening, so that the oil pump body 3 can reduce the ice debris collected at the oil collecting part 43 in the above-mentioned way, so that the oil suction plate 421 can maintain a good working state. When the oil temperature value of the oil pan 1 is greater than the temperature threshold, the water in the oil in the oil pan 1 has not formed a lot of ice debris. At this time, the normal oil suction operation of the oil suction plate 421 can be guaranteed. At this time, it is mainly necessary to ensure the oil pumping efficiency of the oil pump body 3, so the electric control valve 51 will be closed to keep the oil pump body 3 in an efficient oil pumping state. When the real-time oil pressure value of the engine main oil channel 2 is greater than the oil pressure threshold, it is determined that the oil pumping amount of the oil pump body 3 is in an excess state. At this time, the electronically controlled valve 51 will open to relieve the pressure in the engine main oil channel 2.

[0073] Among them, the “when the oil temperature value of the oil pan 1 is less than the temperature threshold, the electronically controlled valve 51 is controlled to open to a certain degree, and the relationship between the real-time oil pressure value and the oil pressure threshold of the main oil channel 2 of the engine is simultaneously obtained 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 channel 2 is less than the oil pressure threshold, the opening of the electric control valve 51 increases;

[0075] When the real-time oil pressure value of the engine main oil channel 2 is greater than the oil pressure threshold, the opening of the electric control valve 51 decreases.

[0076] When the engine is started, the oil temperature of the oil pan 1 is monitored. When the oil temperature of the oil pan 1 is lower than the temperature threshold, the oil temperature is relatively low and the water in the oil is easy to freeze. The electronically controlled valve 51 is opened to a certain degree, and a part of the high-pressure oil in the oil pump body 3 is discharged to the main oil channel 2 of the engine through the oil pump outlet, and a part of the oil is discharged to the filter 422 through the electronically controlled valve 51 and the pressure relief pipe 52. The ice debris from the bottom of the oil pan 1 is washed away by the high-pressure oil, and the leaked oil re-enters the oil pump suction pan 421 to be sucked up by the oil pump. When the temperature is lower than the temperature threshold, the viscosity of the engine oil is relatively high and the engine oil demand of the engine lubrication system is also relatively low. At this time, the electric control valve 51 can be opened to an initial opening of approximately 10%, and then the opening of the electric control valve 51 is controlled according to the oil pressure feedback from the pressure sensor of the engine main oil channel 2. For example, when the oil pressure in the engine main oil channel 2 is greater than the oil pressure threshold, the opening of the electric control valve 51 is reduced; when the oil pressure in the engine main oil channel 2 is less than the oil pressure threshold, the opening of the electric control valve 51 is increased. When the temperature is lower than the threshold, the viscosity of the engine oil is higher and the engine lubrication system requires less oil. At this time, the amount of oil pumped out by the oil pump must be in excess. When the filter is not blocked, the oil pressure in the main oil channel will definitely exceed the oil pressure threshold. Therefore, when the oil pressure in the engine main oil channel 2 is greater than the oil pressure threshold, it means that the filter 422 is not blocked, and the opening of the electric control valve 51 can be reduced (reducing the opening of the electric control valve can increase the oil pressure in the main oil channel. Properly increasing the oil pressure in the main oil channel can speed up the oil pressure establishment time during startup, but it is also necessary to ensure that the oil pressure does not exceed the pressure upper limit, thereby causing oil leakage in the oil circuit). When the oil pressure in the engine main oil channel 2 is lower than the oil pressure threshold, it means that the filter 422 has been blocked, and the opening of the electric control valve 51 needs to be increased to increase the flushing effect of the ice debris on the filter 422. When the temperature is low, the electric control valve 51 is adjusted in real time through the above method. As the engine continues to run, the oil temperature in the oil pan 1 gradually increases, and the ice residue 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 of "when the oil temperature value of the oil pan 1 is greater than the temperature threshold" can be switched to control the electric control valve 51. In short, the control method of the electric control valve 51 proposed in this scheme is a continuous monitoring process. The control method that automatically switches according to the above actual situation can effectively solve the traditional problem that the oil pump body 3 has difficulty pumping oil when the temperature is extremely low. Through the above control method, the high efficiency of the oil pump body 3 can be effectively guaranteed, and it has excellent application value.

[0077] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An engine oil pump, comprising an oil pan and an engine main oil channel, characterized in that: The engine oil pump also includes: An oil pump body, one end of which is connected to the main oil channel of the engine; An oil inlet pipeline, one end of which is connected to the oil inlet of the oil pump body, and the other end of which is arranged corresponding to the bottom of the oil pan; and The anti-blocking pressure relief oil circuit includes an electric control valve and a pressure relief pipe, wherein the electric control valve is arranged 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 arranged corresponding to the oil inlet end of the oil inlet pipeline.

2. The engine oil pump according to claim 1, characterized in that: The oil inlet pipeline comprises: an oil inlet pipe connected to the oil inlet of the oil pump body; and The oil suction structure comprises an oil suction plate and a filter screen, wherein the oil suction plate is arranged at one end of the oil inlet pipe corresponding to the bottom of the oil pan, and the filter screen is arranged at one end of the oil suction plate facing downward; One end of the pressure relief pipe is arranged corresponding to the downward end surface of the filter screen.

3. The engine oil pump according to claim 2, characterized in that: The oil inlet pipeline also includes an oil collecting member, the oil collecting member includes an oil collecting hole with a variable aperture, the oil collecting hole includes a first end with a smaller aperture and a second end with a larger aperture, the first end is connected to a downward end of the oil suction plate; One end of the pressure relief pipe is connected to the oil collecting member and communicates with the oil collecting hole.

4. The engine oil pump according to claim 3, characterized in that: A connecting port is provided on the arcuate side wall of the oil collecting member, the connecting port is located at one end of the oil collecting member, the opening is tangent to the arcuate side wall of the oil collecting hole, and one end of the pressure relief pipe is connected to the other end of the connecting port.

5. The engine oil pump according to 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 and the main oil channel of the engine.

6. The engine oil pump according to 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. The pressure sensor is arranged in the main oil channel of the engine to monitor the oil pressure in the main oil channel of the engine.

7. A car, characterized in that: Comprising the engine oil pump according to any of claims 1-6.

8. A method for controlling an automobile engine oil pump, based on the automobile according to claim 7, characterized in that: The control method of the automobile engine oil pump comprises the following control steps: Set the temperature threshold of the oil in the oil pan and the oil pressure threshold of the main oil gallery of the engine; After the engine is started, obtaining the oil temperature value of the oil pan and the real-time oil pressure value of the main oil channel of the engine; The opening state of the electronically controlled valve is controlled according to the relationship between the oil temperature value of the oil pan and the temperature threshold value, and the relationship between the real-time oil pressure value of the main oil channel of the engine and the oil pressure threshold value.

9. The control method of the automobile engine oil pump according to claim 8, characterized in that: The “controlling the opening state of the electronically controlled valve according to the relationship between the oil temperature value of the oil pan and the temperature threshold value, and the real-time oil pressure value of the main oil channel of the engine” includes: When the oil temperature value of the oil pan is less than the temperature threshold, the electronically controlled valve is controlled to open to a certain degree, and the relationship between the real-time oil pressure value and the oil pressure threshold value of the main oil channel of the engine is simultaneously obtained to adjust the opening degree of the electronically controlled valve; When the oil temperature of the oil pan is greater than the temperature threshold, and the real-time oil pressure of the main oil channel of the engine is less than the oil pressure threshold, the electric control valve is closed; When the oil temperature value of the oil pan is greater than the temperature threshold, and the real-time oil pressure value of the main oil channel of the engine is greater than the oil pressure threshold, the electronically controlled valve is opened.

10. The control method of the automobile engine oil pump according to claim 9, characterized in that: The "when the oil temperature value of the oil pan is less than the temperature threshold, controlling the electronically controlled valve to open a certain opening, and synchronously acquiring the relationship between the real-time oil pressure value and the oil pressure threshold of the main oil channel of the engine to adjust the opening degree of the electronically controlled valve" includes: When the real-time oil pressure value of the main oil channel of the engine is less than the oil pressure threshold, the opening of the electronically controlled valve increases; When the real-time oil pressure value of the main oil channel of the engine is greater than the oil pressure threshold, the opening of the electronically controlled valve decreases.

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