Engine oil aeration prevention device and method

Abstract

The application discloses an engine oil suction emptying prevention device and method, and relates to the field of engine oil suction emptying prevention devices.The engine oil suction emptying prevention device comprises an oil pump, an oil filter and a main oil passage, the oil filter is connected to an oil suction pipe inlet of the oil pump and is arranged below an oil liquid level in an oil pan, the main oil passage is connected to an oil suction pipe outlet of the oil pump, the oil filter is used for sucking the oil in the oil pan to the main oil passage under the action of the oil pump, at least one electromagnetic controller is arranged at a position close to the oil filter at the bottom of the oil pan, when the oil liquid level fluctuation exceeds a first preset value, the oil filter can adjust the position under the action of the electromagnetic controller, so that the oil filter is always below the oil liquid level, thereby preventing the engine oil from being sucked empty, and improving the service life of the engine.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to a device and method for preventing engine oil from sucking into the air. Background Technology

[0002] In order to reduce frictional wear between internal parts, the engine needs to be lubricated with engine oil during operation. An oil filter is usually used to draw the oil from the oil pan and distribute it through the main oil passage to the various parts of the engine that need lubrication.

[0003] In related technologies, oil filters are fixedly installed. However, due to the complex actual operating conditions of the engine, such as when the vehicle is going uphill or downhill, accelerating rapidly, braking suddenly, or turning, the oil in the oil pan will maintain its original motion state due to inertia. This causes the oil level in the oil pan to form a certain angle with the oil filter, resulting in the oil filter being partially exposed to air. This prevents the oil filter from drawing in enough oil (i.e., oil cavitation), leading to an increase in the air content of the drawn-in oil. This reduces the efficiency of the lubrication system or even causes it to fail, affecting the service life of the engine.

[0004] Therefore, there is an urgent need for a solution that can prevent engine oil from being sucked into the air. Summary of the Invention

[0005] This invention provides a device and method for preventing engine oil from drawing in air, in order to solve the problem of reduced efficiency or failure of the lubrication system caused by the increased air content in the drawn-in engine oil due to engine oil drawing in air.

[0006] According to one aspect of the present invention, an engine oil anti-cavitation device is provided, the engine oil anti-cavitation device comprising:

[0007] Oil pump, oil strainer and main oil passage;

[0008] The oil strainer is connected to the oil pump's suction pipe inlet and is positioned below the oil level in the oil pan. The main oil passage is connected to the oil pump's suction pipe outlet. The oil strainer is used to draw oil from the oil pan into the main oil passage under the action of the oil pump.

[0009] At least one electromagnetic controller is provided at the bottom of the oil pan near the oil filter. When the oil level fluctuates beyond a first preset value, the oil filter can adjust its position under the action of the electromagnetic controller so that the oil filter is always below the oil level.

[0010] Optionally, the electromagnetic controller includes a current direction adjustment module, a current magnitude adjustment module, and an electromagnet, and the oil filter is provided with a magnetic component on the side adjacent to the bottom of the oil pan;

[0011] The current direction adjustment module is used to adjust the direction of the current flowing through the electromagnet under the control of the vehicle's electronic control unit, thereby adjusting the direction of the magnetic field generated by the electromagnet. The current magnitude adjustment module is used to adjust the magnitude of the current flowing through the electromagnet under the control of the vehicle's electronic control unit, thereby adjusting the magnitude of the magnetic field generated by the electromagnet. The oil filter can adjust its position under the action of the magnetic field generated by the electromagnet so that the oil filter is always below the oil level.

[0012] Optionally, the current direction adjustment module includes a first controller and a double-pole double-throw switch. The first controller is used to drive the double-pole double-throw switch to switch the path connected to the electromagnet under the control of the vehicle's electronic control unit, thereby adjusting the direction of the current flowing through the electromagnet.

[0013] Optionally, the current adjustment module includes a second controller and a sliding rheostat. The second controller is used to adjust the position of the slider of the sliding rheostat under the control of the vehicle's electronic control unit, thereby adjusting the magnitude of the current passing through the sliding rheostat.

[0014] Optionally, an ultrasonic sensor is provided on the side of the oil filter near the bottom of the oil pan. The ultrasonic sensor is communicatively connected to the vehicle's electronic control unit. The ultrasonic sensor is used to obtain the distance between the side of the oil filter near the bottom of the oil pan and the oil level in real time, and to send the distance between the side of the oil filter near the bottom of the oil pan and the oil level to the vehicle's electronic control unit.

[0015] The electronic control unit is used to adjust the magnitude and / or direction of the magnetic field generated by the electromagnetic controller when the distance fluctuation between the side of the oil filter near the bottom of the oil pan and the oil surface exceeds a first preset value.

[0016] Optionally, the engine oil anti-cavitation device also includes an oil pressure sensor;

[0017] The oil pressure sensor is located in the main oil passage and is communicatively connected to the vehicle's electronic control unit. The oil pressure sensor is used to acquire the oil pressure in the main oil passage and send the oil pressure in the main oil passage to the vehicle's electronic control unit. When the oil pressure in the main oil passage is greater than or equal to a second preset value after a preset time after the engine starts, and the oil level fluctuation exceeds a first preset value, the oil filter can adjust its position under the action of the electromagnetic controller so that the oil filter is always below the oil level.

[0018] Optionally, the engine oil anti-cavitation device also includes a display module;

[0019] The display module is communicatively connected to the vehicle's electronic control unit, and is used to display the oil pressure of the main oil passage.

[0020] According to another aspect of the present invention, an engine oil anti-cavitation method is provided, applied to any of the above-described engine oil anti-cavitation devices, the method comprising:

[0021] Determine whether the fluctuation of the engine oil level exceeds the first preset value;

[0022] When the oil level fluctuates beyond a first preset value, the position of the oil filter is adjusted to ensure that the oil filter is always below the oil level.

[0023] Optionally, determining whether the oil level fluctuation exceeds a first preset value includes:

[0024] The distance between the side of the oil filter near the bottom of the oil pan and the oil surface is obtained. If the distance between the side of the oil filter near the bottom of the oil pan and the oil surface exceeds a first preset value, it is determined that the oil level fluctuation exceeds the first preset value.

[0025] The step of controlling the oil filter to adjust its position so that the oil filter is always below the oil level when the oil level fluctuation exceeds a first preset value includes:

[0026] When the oil level fluctuation exceeds the first preset value, the magnitude and / or direction of the magnetic field generated by the electromagnetic controller are adjusted so that the oil filter can adjust its position under the action of the electromagnetic controller so that the oil filter is always below the oil level.

[0027] Optionally, before determining whether the oil level fluctuation exceeds a first preset value, the method further includes:

[0028] Determine if the engine has started successfully;

[0029] The determination of whether the engine has started successfully includes:

[0030] The oil pressure in the main oil passage is obtained. When the oil pressure in the main oil passage is greater than or equal to a second preset value after a preset time after the engine starts, the engine is judged to have started successfully.

[0031] According to the technical solution of this invention, when the oil level fluctuation exceeds a first preset value, the oil filter can adjust its position under the action of an electromagnetic controller so that the oil filter is always below the oil level, thereby preventing the engine oil from being sucked into the air and avoiding the reduction or failure of the lubrication system efficiency caused by the increased air content in the sucked-in oil due to the engine oil being sucked into the air, thus improving the service life of the engine.

[0032] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0033] 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of an engine oil anti-cavitation device provided in an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of the structure of an electromagnetic controller provided in an embodiment of the present invention;

[0036] Figure 3 A schematic diagram of another engine oil anti-cavitation device provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of a current direction adjustment module provided in an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of a current magnitude adjustment module provided in an embodiment of the present invention;

[0039] Figure 6 A flowchart of a method for preventing engine oil from cavitating, provided as an embodiment of the present invention;

[0040] Figure 7 A flowchart of another method for preventing engine oil from sucking into cavitation provided in an embodiment of the present invention. Detailed Implementation

[0041] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0042] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0043] Figure 1 This is a schematic diagram of an engine oil anti-cavitation device provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the engine oil anti-cavitation device 10 includes: an oil pump 11, an oil strainer 12, and a main oil passage 13. The oil strainer 12 is connected to the oil suction pipe inlet of the oil pump 11 and is disposed within the oil pan 14 at the oil level. Figure 1 Below the dashed line, the main oil passage 13 is connected to the oil suction pipe outlet of the oil pump 11. The oil filter 12 is used to draw the oil in the oil pan 14 into the main oil passage 13 under the action of the oil pump 11. At least one electromagnetic controller 15 is provided at the bottom of the oil pan 14 near the position of the oil filter 12. When the oil level fluctuates beyond a first preset value, the oil filter 12 can adjust its position under the action of the electromagnetic controller 15 so that the oil filter 12 is always below the oil level.

[0044] Specifically, the oil strainer 12, near the bottom of the oil pan, generally has a metal mesh structure. It is used to filter out impurities such as metal shavings, mechanical debris, and oil oxides from the oil. Under the action of the oil pump 11, the filtered oil is drawn into the main oil passage 13. The main oil passage 13 can then distribute the filtered oil to the engine cylinders (not shown) of the bearings in the crankshaft connecting rod mechanism, the camshaft bearings, the valve drive mechanism, and the lubrication points of the transmission mechanism. In this embodiment, at least one electromagnetic controller 15 is provided at the bottom of the oil pan 14 near the oil strainer 12, and there is a preset distance between the electromagnetic controller 15 and the oil strainer 12. Preferably, with the vehicle's front direction X as the front of the vehicle, at least one electromagnetic controller 15 is provided at the bottom of the oil pan 14 near the oil strainer 12 in each of the four directions: front, rear, left, and right. Figure 1 An example is given of two electromagnetic controllers 15 arranged in the front-rear direction of the vehicle. The electromagnetic controllers 15 are connected to the vehicle's electronic control unit 20. The electromagnetic controllers 15 can generate magnetic force under the action of control signals issued by the vehicle's electronic control unit 20 to adjust the position of the oil filter 12. When the oil level fluctuation exceeds the first preset value, the oil filter 12 can adjust its position under the action of the electromagnetic controller 15 so that the oil filter 12 is always below the oil level. It is easy to understand that the greater the instantaneous acceleration of the vehicle, the greater the fluctuation of the oil level. When the vehicle's electronic control unit 20 detects that the instantaneous acceleration of the vehicle in the X direction (forward) is greater than the first threshold, it is determined that the oil level fluctuation exceeds the first preset value (the correspondence between the magnitude of instantaneous acceleration and the magnitude of oil level fluctuation can be measured experimentally). It is easy to determine that the oil level is lower in the front and higher in the rear. At this time, the vehicle's electronic control unit 20 controls the electromagnetic controller 15 at the front of the vehicle to generate magnetic force so that the oil filter 12 adjusts its position so that the oil filter 12 is always below the oil level, thereby preventing the engine oil from being sucked into the air. In other embodiments, a spiral tube 16 is provided between the oil suction pipe inlet of the oil pump 11 and the oil filter 12. The spiral tube 16 is made of a metal material with certain toughness and fatigue strength, which is beneficial for the oil filter 12 to change position under the action of the magnetic force generated by the electromagnetic controller 15, and to return to its initial position when the magnetic force of the electromagnetic controller 15 disappears.

[0045] The engine oil anti-cavitation device provided in this embodiment of the invention includes an oil pump, an oil strainer, and a main oil passage. The oil strainer is connected to the oil pump's suction pipe inlet and is positioned below the oil level in the oil pan. The main oil passage is connected to the oil pump's suction pipe outlet. The oil strainer is used to draw oil from the oil pan into the main oil passage under the action of the oil pump. At least one electromagnetic controller is provided at the bottom of the oil pan near the oil strainer. When the oil level fluctuation exceeds a first preset value, the oil strainer can adjust its position under the action of the electromagnetic controller to ensure that the oil strainer is always below the oil level, thereby preventing engine oil from cavitating. This avoids the lubrication system efficiency reduction or failure caused by the increased air content in the drawn-in oil due to engine oil cavitation, and improves the engine's service life.

[0046] In an optional embodiment of the present invention, Figure 2 This is a schematic diagram of the structure of an electromagnetic controller provided in an embodiment of the present invention. Figure 3 This is a schematic diagram of another engine oil anti-cavitation device provided in an embodiment of the present invention, which is also referred to in the present invention. Figure 2 and Figure 3 The electromagnetic controller 15 includes a current direction adjustment module 151, a current magnitude adjustment module 152, and an electromagnet 153. The oil filter 12 has a magnetic component 121 on one side near the bottom of the oil pan. The current direction adjustment module 151 is used to adjust the direction of the current flowing through the electromagnet 153 under the control of the vehicle's electronic control unit 20, thereby adjusting the direction of the magnetic field generated by the electromagnet 153. The current magnitude adjustment module 152 is used to adjust the magnitude of the current flowing through the electromagnet 153 under the control of the vehicle's electronic control unit 20, thereby adjusting the magnitude of the magnetic field generated by the electromagnet 153. The oil filter 12 can adjust its position under the action of the magnetic field generated by the electromagnet 153 so that the oil filter 12 is always below the oil level.

[0047] Specifically, the magnetic component 121 is configured in a one-to-one correspondence with the electromagnetic controller 15. The magnetic component 121 can be a permanent magnet (such as a natural lodestone) or a non-permanent magnet (such as an electromagnet), and this application does not impose any restrictions on this. The electromagnetic controller 15 is also connected to the power supply module 30, which is connected to the electromagnet 153 via the current direction adjustment module 151 and the current magnitude adjustment module 152. This embodiment uses the magnetic component 121 as a permanent magnet for illustrative purposes. When the instantaneous acceleration of the vehicle in the X direction (forward) exceeds the first threshold, it is determined that the oil level fluctuation exceeds the first preset value. It is easy to determine that the oil level is lower in the front and higher in the rear. At this time, the vehicle's electronic control unit 20 controls the current direction adjustment module 151 in the electromagnetic controller 15 at the front of the vehicle to adjust the direction of the current flowing through the electromagnet 153, thereby controlling the electromagnet 153 in the electromagnetic controller 15 at the front of the vehicle to generate a magnetic force that attracts the corresponding magnetic component 121. The vehicle's electronic control unit 20 controls the current direction adjustment module 151 in the electromagnetic controller 15 at the rear of the vehicle to adjust the direction of the current flowing through the electromagnet 153, thereby controlling the electromagnet 153 in the electromagnetic controller 15 at the rear of the vehicle to generate a magnetic force that repels the corresponding magnetic component 121, thereby controlling the oil filter 12 to adjust its position so that the position of the oil filter 12 is consistent with the oil level (i.e., lower in the front and higher in the rear), ensuring that the oil filter 12 is always below the oil level. When the instantaneous acceleration of the vehicle in the X direction (forward) is greater, the fluctuation of the oil level is greater. To ensure that the oil strainer 12 is always below the oil level, the magnetic force generated by the electromagnetic controller 15 needs to be increased to increase the adjustment angle of the oil strainer 12. At this time, the current adjustment module 152 in the electromagnetic controller 15 at the front of the vehicle is controlled by the vehicle's electronic control unit 20 to adjust the current flowing through the electromagnet 153, thereby controlling the electromagnet 153 in the electromagnetic controller 15 at the front of the vehicle to generate a larger magnetic force that attracts the corresponding magnetic component 121. This is controlled by the vehicle's electronic control unit 20. The current adjustment module 152 in the electromagnetic controller 15 at the rear of the vehicle adjusts the current flowing through the electromagnet 153, thereby controlling the electromagnet 153 in the electromagnetic controller 15 at the rear of the vehicle to generate a larger magnetic force that repels the corresponding magnetic component 121. This further ensures that the position of the oil filter 12 is consistent with the oil level (i.e., lower in the front and higher in the rear), ensuring that the oil filter 12 is always below the oil level. This prevents the engine oil from being sucked into the air, avoids the reduction or failure of the lubrication system due to the increased air content in the sucked-in oil caused by the engine oil being sucked into the air, and improves the service life of the engine.

[0048] In an optional embodiment of the present invention, Figure 4 This is a schematic diagram of a current direction adjustment module provided in an embodiment of the present invention, which is also referred to herein. Figure 2 and Figure 4 The current direction adjustment module 151 includes a first controller 1511 and a double-pole double-throw switch 1512. The first controller 1511 is used to drive the double-pole double-throw switch 1512 to switch the path connected to the electromagnet 153 under the control of the vehicle's electronic control unit 20, thereby adjusting the direction of the current flowing through the electromagnet 153. For example, when the vehicle's electronic control unit 20 detects that the instantaneous acceleration of the vehicle in the X direction (forward) is greater than a first threshold, it is determined that the oil level fluctuation exceeds a first preset value (the correspondence between the magnitude of the instantaneous acceleration and the magnitude of the oil level fluctuation can be measured experimentally), and it is easy to determine that the oil level is lower in the front and higher in the back. At this time, the vehicle's electronic control unit 20 controls the first controller 1511 in the electromagnetic controller 15 at the front of the vehicle to drive the double-pole double-throw switch 1512 to switch the path connected to the electromagnet 153, thereby controlling the electromagnet 153 in the electromagnetic controller 15 at the front of the vehicle to generate a magnetic force that attracts the corresponding magnetic component 121. The vehicle's electronic control unit 20 controls the first controller 1511 in the rear electromagnetic controller 15 to drive the double-pole double-throw switch 1512, thereby switching the path connected to the electromagnet 153. This controls the electromagnet 153 in the rear electromagnetic controller 15 to generate a magnetic force that repels the corresponding magnetic component 121. This, in turn, controls the oil filter 12 to adjust its position so that it is aligned with the oil level (i.e., lower in the front and higher in the rear), ensuring that the oil filter 12 is always below the oil level.

[0049] In an optional embodiment of the present invention, Figure 5 This is a schematic diagram of a current adjustment module provided in an embodiment of the present invention, which is also referred to herein. Figure 2 and Figure 5The current adjustment module 152 includes a second controller 1521 and a sliding rheostat 1522. The second controller 1521 is used to adjust the position of the slider of the sliding rheostat 1512 under the control of the vehicle's electronic control unit 20, thereby adjusting the magnitude of the current through the sliding rheostat 1512. For example, when the vehicle's electronic control unit 20 detects that the instantaneous acceleration of the vehicle in the X direction (forward) is greater than a first threshold, it determines that the oil level fluctuation exceeds a first preset value (the correspondence between the magnitude of instantaneous acceleration and the magnitude of oil level fluctuation can be experimentally determined), and it is easy to determine that the oil level is lower in the front and higher in the back. At this time, the vehicle's electronic control unit 20 controls the current direction adjustment module 151 in the electromagnetic controller 15 at the front of the vehicle to adjust the direction of the current flowing through the electromagnet 153, thereby controlling the current in the electromagnetic controller 15 at the front of the vehicle. Magnet 153 generates a magnetic force that attracts the corresponding magnetic component 121. The electronic control unit 20 of the vehicle controls the current direction adjustment module 151 in the electromagnetic controller 15 at the rear of the vehicle to adjust the direction of the current flowing through the electromagnet 153, thereby controlling the electromagnet 153 in the electromagnetic controller 15 at the rear of the vehicle to generate a magnetic force that repels the corresponding magnetic component 121. This, in turn, controls the oil filter 12 to adjust its position so that the position of the oil filter 12 is consistent with the oil level (i.e., lower in the front and higher in the back), ensuring that the oil filter 12 is always below the oil level. When the instantaneous acceleration of the vehicle in the X direction (forward) is greater, the fluctuation of the oil level is greater. To ensure that the oil strainer 12 is always below the oil level, the magnetic force generated by the electromagnetic controller 15 needs to be increased to increase the adjustment angle of the oil strainer 12. At this time, the electronic control unit 20 of the vehicle controls the second controller 1521 in the electromagnetic controller 15 at the front of the vehicle to adjust the position of the slider of the sliding rheostat 1512, thereby adjusting the current through the sliding rheostat 1512. This, in turn, controls the electromagnet 153 in the electromagnetic controller 15 at the front of the vehicle to generate a larger magnetic force that attracts the corresponding magnetic component 121. This is then controlled by the electronic control unit 20 of the vehicle. The second controller 1521 in the electromagnetic controller 15 at the rear of the vehicle adjusts the position of the slider of the sliding rheostat 1512, thereby adjusting the current through the sliding rheostat 1512. This, in turn, controls the electromagnet 153 in the electromagnetic controller 15 at the rear of the vehicle to generate a larger magnetic force that repels the corresponding magnetic component 121. This further ensures that the position of the oil filter 12 is consistent with the oil level (i.e., lower in the front and higher in the rear), ensuring that the oil filter 12 is always below the oil level. This prevents the engine oil from being sucked into the air, avoids the lubrication system efficiency reduction or failure caused by the increased air content in the oil due to the engine oil being sucked into the air, and improves the service life of the engine.

[0050] In an optional embodiment of the present invention, reference continues to be made to... Figure 3An ultrasonic sensor 17 is provided on the side of the oil filter 12 adjacent to the bottom of the oil pan 14. The ultrasonic sensor 17 is communicatively connected to the vehicle's electronic control unit 20. The ultrasonic sensor 17 is used to acquire the distance between the side of the oil filter 12 adjacent to the bottom of the oil pan 14 and the oil surface in real time, and sends the distance between the side of the oil filter 12 adjacent to the bottom of the oil pan 14 and the oil surface to the vehicle's electronic control unit 20. The electronic control unit 20 is used to adjust the magnitude and / or direction of the magnetic field generated by the electromagnetic controller 15 when the fluctuation value of the distance between the side of the oil filter 12 adjacent to the bottom of the oil pan 14 and the oil surface exceeds a first preset value.

[0051] Specifically, the ultrasonic sensor 17 and the electromagnetic controller 15 are configured in a one-to-one correspondence. Figure 3 The following example illustrates two electromagnetic controllers 15 and two corresponding ultrasonic sensors 17 arranged in the front-to-back direction of the vehicle. When the ultrasonic sensor 17 at the front of the vehicle (X direction) detects that the side of the oil filter 12 adjacent to the bottom of the oil pan 14 is higher than the oil level, and the distance between the side of the oil filter 12 adjacent to the bottom of the oil pan 14 and the oil level exceeds a first preset value, the vehicle's electronic control unit 20 controls the electromagnetic controller 15 at the front of the vehicle to generate a magnetic force that attracts the corresponding magnetic component 121, thereby controlling the oil filter 12 to adjust its position so that the position of the oil filter 12 is consistent with the oil level. When the distance between the side of the oil filter 12 adjacent to the bottom of the oil pan 14 and the oil level is greater, in order to ensure that the oil filter 12 is always below the oil level, it is necessary to increase the magnetic force generated by the electromagnetic controller 15 to increase the adjustment angle of the oil filter 12. At this time, the electromagnetic controller 15 at the front of the vehicle is controlled by the vehicle's electronic control unit 20 to generate a larger magnetic force that attracts the corresponding magnetic component 121, further ensuring that the position of the oil filter 12 is consistent with the oil level, ensuring that the oil filter 12 is always below the oil level, thereby preventing the engine oil from being sucked into the air, avoiding the reduction or failure of the lubrication system efficiency caused by the increased air content in the sucked-in oil due to the engine oil being sucked into the air, and improving the service life of the engine.

[0052] In an optional embodiment of the present invention, reference continues to be made to... Figure 3The engine oil anti-air intake device 10 also includes an oil pressure sensor 18. The oil pressure sensor 18 is located in the main oil passage 13 and is connected to the vehicle's electronic control unit 20. The oil pressure sensor 18 is used to obtain the oil pressure in the main oil passage 13 and send the oil pressure in the main oil passage 13 to the vehicle's electronic control unit 20. When the oil pressure in the main oil passage 13 is greater than or equal to a second preset value after a preset time after the engine starts, and the oil level fluctuation exceeds a first preset value, the oil filter 12 can adjust its position under the action of the electromagnetic controller 15 so that the oil filter 12 is always below the oil level.

[0053] Specifically, the preset time can be 10 seconds, and the second preset value can be 70 kPa. In this embodiment, if the oil pressure in the main oil passage is less than 70 kPa 10 seconds after the engine starts, the engine is determined to have failed to start. At this time, the engine oil anti-cavitation device can be de-energized and stop working to reduce power consumption. If the oil pressure in the main oil passage is greater than or equal to 70 kPa 10 seconds after the engine starts, the engine is determined to have started successfully. At this time, the engine oil anti-cavitation device starts working, thereby adjusting the position of the oil strainer when the oil level fluctuation exceeds the first preset value, so that the oil strainer is always below the oil level during engine operation, thereby preventing engine oil from cavitating and avoiding the reduction or failure of lubrication system efficiency caused by the increased air content in the oil due to engine oil cavitating, thus improving the service life of the engine.

[0054] In an optional embodiment of the present invention, reference continues to be made to... Figure 3 The engine oil cavitation prevention device 10 also includes a display module 40, which is communicatively connected to the vehicle's electronic control unit 20. The display module 40 is used to display the oil pressure of the main oil passage 13, allowing the driver to obtain the real-time oil pressure of the main oil passage through the display module 40. In other embodiments, the display module 40 can be the vehicle's instrument panel.

[0055] Figure 6 This is a flowchart of a method for preventing engine oil cavitation provided in an embodiment of the present invention. This method can be executed by the engine oil cavitation prevention device described in the above embodiments, such as... Figure 6 As shown, the method includes:

[0056] S110. Determine whether the fluctuation of the engine oil level exceeds the first preset value.

[0057] For details, please refer to the following: Figure 1The electronic control unit 20 can detect the instantaneous acceleration of the vehicle to determine whether the oil level fluctuation exceeds a first preset value. For example, when the vehicle's electronic control unit 20 detects that the instantaneous acceleration of the vehicle in the X direction (forward) is greater than the first threshold, it is determined that the oil level fluctuation exceeds the first preset value (the correspondence between the magnitude of the instantaneous acceleration and the magnitude of the oil level fluctuation can be measured experimentally).

[0058] In an optional embodiment of the present invention, determining whether the oil level fluctuation exceeds a first preset value includes:

[0059] The distance between the side of the oil strainer near the bottom of the oil pan and the oil level is obtained. If the distance between the side of the oil strainer near the bottom of the oil pan and the oil level exceeds a first preset value, it is determined that the oil level fluctuation exceeds the first preset value. For example, refer to... Figure 3 The distance between the oil level and the side of the oil filter 12 adjacent to the bottom of the oil pan 14 can be obtained in real time by the ultrasonic sensor 17.

[0060] S120. When the oil level fluctuates beyond the first preset value, control the oil filter to adjust its position so that the oil filter is always below the oil level.

[0061] In an optional embodiment of the present invention, when the oil level fluctuation exceeds a first preset value, controlling the oil filter to adjust its position so that the oil filter is always below the oil level includes:

[0062] When the oil level fluctuates beyond the first preset value, the magnitude and / or direction of the magnetic field generated by the electromagnetic controller are adjusted so that the oil filter can adjust its position under the action of the electromagnetic controller so that the oil filter is always below the oil level.

[0063] For details, please refer to the following: Figure 2 and Figure 3When the ultrasonic sensor 17 at the front of the vehicle (X direction) detects that the side of the oil filter 12 adjacent to the bottom of the oil pan 14 is higher than the oil level, and the distance between the side of the oil filter 12 adjacent to the bottom of the oil pan 14 and the oil level exceeds a first preset value, the electronic control unit 20 of the vehicle controls the electromagnetic controller 15 at the front of the vehicle to generate a magnetic force that attracts the corresponding magnetic component 121, thereby controlling the oil filter 12 to adjust its position so that the position of the oil filter 12 is consistent with the oil level. When the distance between the side of the oil filter 12 adjacent to the bottom of the oil pan 14 and the oil level is greater, in order to ensure that the oil filter 12 is always below the oil level, it is necessary to increase the magnetic force generated by the electromagnetic controller 15 to increase the adjustment angle of the oil filter 12. At this time, the electromagnetic controller 15 at the front of the vehicle is controlled by the vehicle's electronic control unit 20 to generate a larger magnetic force that attracts the corresponding magnetic component 121, further ensuring that the position of the oil filter 12 is consistent with the oil level, ensuring that the oil filter 12 is always below the oil level, thereby preventing the engine oil from being sucked into the air, avoiding the reduction or failure of the lubrication system efficiency caused by the increased air content in the sucked-in oil due to the engine oil being sucked into the air, and improving the service life of the engine.

[0064] Figure 7 A flowchart of another method for preventing engine oil from sucking into cavitation provided by an embodiment of the present invention is shown below. Figure 7 As shown, the method includes:

[0065] S200: Determine if the engine has started successfully.

[0066] Specifically, when the engine fails to start, the engine oil cavitation prevention device can be de-energized and stop working to reduce power consumption. When the engine starts successfully, the engine oil cavitation prevention device starts working, thereby adjusting the position of the oil strainer when the oil level fluctuation exceeds the first preset value, so that the oil strainer is always below the oil level during engine operation.

[0067] In an optional embodiment of the present invention, determining whether the engine has started successfully includes:

[0068] The oil pressure in the main oil passage is obtained. When the oil pressure in the main oil passage is greater than or equal to a second preset value after a preset time after the engine starts, the engine is judged to have started successfully.

[0069] Specifically, the preset time can be 10 seconds, and the second preset value can be 70 kPa. In this embodiment, if the oil pressure in the main oil passage is less than 70 kPa 10 seconds after the engine starts, the engine is determined to have failed to start. At this time, the engine oil anti-cavitation device can be de-energized and stop working to reduce power consumption. If the oil pressure in the main oil passage is greater than or equal to 70 kPa 10 seconds after the engine starts, the engine is determined to have started successfully. At this time, the engine oil anti-cavitation device starts working, thereby adjusting the position of the oil strainer when the oil level fluctuation exceeds the first preset value, so that the oil strainer is always below the oil level during engine operation, thereby preventing engine oil from cavitating and avoiding the reduction or failure of lubrication system efficiency caused by the increased air content in the oil due to engine oil cavitating, thus improving the service life of the engine.

[0070] S210. When the engine starts successfully, determine whether the oil level fluctuation exceeds the first preset value.

[0071] S220. When the oil level fluctuation exceeds the first preset value, control the oil filter to adjust its position so that the oil filter is always below the oil level.

[0072] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and no limitation is imposed herein.

[0073] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. An engine oil anti-cavitation device, characterized in that, include: Oil pump, oil strainer and main oil passage; The oil strainer is connected to the oil pump's suction pipe inlet and is positioned below the oil level in the oil pan. The main oil passage is connected to the oil pump's suction pipe outlet. The oil strainer is used to draw oil from the oil pan into the main oil passage under the action of the oil pump. At least one electromagnetic controller is provided at the bottom of the oil pan near the oil filter. When the oil level fluctuates beyond a first preset value, the oil filter can adjust its position under the action of the electromagnetic controller so that the oil filter is always below the oil level. The electromagnetic controller includes a current direction adjustment module, a current magnitude adjustment module, and an electromagnet. The oil filter is provided with a magnetic component on the side adjacent to the bottom of the oil pan. The current direction adjustment module is used to adjust the direction of the current flowing through the electromagnet under the control of the vehicle's electronic control unit, thereby adjusting the direction of the magnetic field generated by the electromagnet. The current magnitude adjustment module is used to adjust the magnitude of the current flowing through the electromagnet under the control of the vehicle's electronic control unit, thereby adjusting the magnitude of the magnetic field generated by the electromagnet. The oil filter can adjust its position under the action of the magnetic field generated by the electromagnet so that the oil filter is always below the oil level.

2. The engine oil anti-cavitation device according to claim 1, characterized in that, The current direction adjustment module includes a first controller and a double-pole double-throw switch. The first controller is used to drive the double-pole double-throw switch to switch the path connected to the electromagnet under the control of the vehicle's electronic control unit, thereby adjusting the direction of the current flowing through the electromagnet.

3. The engine oil anti-cavitation device according to claim 1, characterized in that, The current adjustment module includes a second controller and a sliding rheostat. The second controller is used to adjust the position of the slider of the sliding rheostat under the control of the vehicle's electronic control unit, thereby adjusting the magnitude of the current passing through the sliding rheostat.

4. The engine oil anti-cavitation device according to claim 1, characterized in that, An ultrasonic sensor is provided on the side of the oil filter near the bottom of the oil pan. The ultrasonic sensor is communicatively connected to the vehicle's electronic control unit. The ultrasonic sensor is used to obtain the distance between the side of the oil filter near the bottom of the oil pan and the oil level in real time, and to send the distance between the side of the oil filter near the bottom of the oil pan and the oil level to the vehicle's electronic control unit. The electronic control unit is used to adjust the magnitude and / or direction of the magnetic field generated by the electromagnetic controller when the distance fluctuation between the side of the oil filter near the bottom of the oil pan and the oil surface exceeds a first preset value.

5. The engine oil anti-cavitation device according to claim 1, characterized in that, It also includes an oil pressure sensor; The oil pressure sensor is located in the main oil passage and is communicatively connected to the vehicle's electronic control unit. The oil pressure sensor is used to acquire the oil pressure in the main oil passage and send the oil pressure in the main oil passage to the vehicle's electronic control unit. When the oil pressure in the main oil passage is greater than or equal to a second preset value after a preset time after the engine starts, and the oil level fluctuation exceeds a first preset value, the oil filter can adjust its position under the action of the electromagnetic controller so that the oil filter is always below the oil level.

6. The engine oil anti-cavitation device according to claim 1, characterized in that, It also includes a display module; The display module is communicatively connected to the vehicle's electronic control unit, and is used to display the oil pressure of the main oil passage.

7. A method for preventing engine oil from cavitating, applied to the engine oil cavitating prevention device according to any one of claims 1-6, characterized in that, include: Determine whether the fluctuation of the engine oil level exceeds the first preset value; When the oil level fluctuates beyond a first preset value, the position of the oil filter is adjusted to ensure that the oil filter is always below the oil level.

8. The method for preventing engine oil from sucking into cavitation according to claim 7, characterized in that, The determination of whether the oil level fluctuation exceeds the first preset value includes: The distance between the side of the oil filter near the bottom of the oil pan and the oil surface is obtained. If the distance between the side of the oil filter near the bottom of the oil pan and the oil surface exceeds a first preset value, it is determined that the oil level fluctuation exceeds the first preset value. The step of controlling the oil filter to adjust its position so that the oil filter is always below the oil level when the oil level fluctuation exceeds a first preset value includes: When the oil level fluctuation exceeds the first preset value, the magnitude and / or direction of the magnetic field generated by the electromagnetic controller are adjusted so that the oil filter can adjust its position under the action of the electromagnetic controller so that the oil filter is always below the oil level.

9. The method for preventing engine oil from sucking into cavitation according to claim 7, characterized in that, Before determining whether the oil level fluctuation exceeds a first preset value, the method further includes: Determine if the engine has started successfully; The determination of whether the engine has started successfully includes: The oil pressure in the main oil passage is obtained. When the oil pressure in the main oil passage is greater than or equal to a second preset value after a preset time after the engine starts, the engine is judged to have started successfully.

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