Oil pan structure, lubricating system, engine assembly, aircraft and automobile

Abstract

The utility model provides an oil pan structure, a lubricating system, an engine assembly, an aircraft and an automobile. The oil pan structure comprises an upper oil pan, a lower oil pan and a valve plate assembly. The upper oil pan is connected with the lower oil pan, and an oil return opening is formed in the upper oil pan; the valve plate assembly is rotatably installed on the upper oil pan and matched with the oil return opening so that the oil return opening can be in a blocked state or an opened state. According to the utility model, the valve plate assembly is rotatably arranged on the upper oil pan and is matched with the oil return port, so that the valve plate assembly can be rotated to different postures according to the real-time state of the oil pan structure, and the oil return port is in a blocked state or an opened state; the requirement that the engine oil pump assembly can pump lubricating oil in the containing cavity to lubricate an engine is met, and normal lubrication of the engine is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil pan structures, in particular to an oil pan structure, a lubrication system, an engine assembly, an aircraft and a car. Background Art

[0002] The oil sump structure is mounted on the engine, sealing the engine and acting as the outer shell of the oil reservoir. The oil sump prevents external impurities from entering the engine's interior. It also collects and stores lubricating oil that flows back from the friction surfaces and dissipates some of the lubricating oil's heat, preventing oxidation.

[0003] In many cases, existing oil pan structures cannot meet the requirements of the oil pump assembly to pump lubricating oil from the oil pan to lubricate the engine. For example, when the engine is used in certain overload conditions, the lubricating oil in the oil pan may flow upward, preventing the lubricating oil from the engine from smoothly returning to the oil pan. This can cause the oil pump assembly to lose oil at the suction port, resulting in insufficient lubrication for the engine. Furthermore, when the engine experiences short-term excessive acceleration in all directions, causing the lubricating oil in the oil pan to deflect to one side, the oil pump assembly can also lose oil, potentially damaging the engine. Utility Model Content

[0004] The utility model provides an oil pan structure, a lubrication system, an engine assembly, an aircraft and an automobile, so as to solve the problem that the existing oil pan structure cannot meet the requirement of the oil pump assembly to pump lubricating oil into the oil pan structure to lubricate the engine in many cases.

[0005] An oil sump structure comprises an upper oil sump, a lower oil sump and a valve plate assembly;

[0006] The upper oil pan is connected to the lower oil pan, and the upper oil pan is provided with an oil return port;

[0007] The valve plate assembly can be rotatably mounted on the upper oil pan and matched with the oil return port so that the oil return port is in a blocked state or an open state.

[0008] Preferably, the valve plate assembly comprises a mounting seat and a valve plate body;

[0009] The mounting seat is fixed on the upper oil pan, and one end of the valve plate body is rotatably mounted on the mounting seat;

[0010] The valve plate body matches the oil return port so that the oil return port is in a blocked state or an open state.

[0011] Preferably, the number of the valve plate assemblies is at least two, and at least two of the valve plate assemblies are arranged on the upper oil pan at intervals.

[0012] Preferably, the oil pan structure further includes an oil pan baffle; the oil pan baffle is mounted on the upper oil pan, or the oil pan baffle and the upper oil pan are integrally formed; the oil return port is provided on the oil pan baffle.

[0013] Preferably, a first recess and a second recess are provided on a side of the upper oil pan away from the lower oil pan, and the depth of the first recess is greater than the depth of the second recess; the first recess is used to install the oil pump assembly, and the valve plate assembly is provided on both the first recess and the second recess.

[0014] A lubrication system comprises an oil pump assembly and the oil pan structure; the oil pump assembly is mounted on the oil pan structure.

[0015] Preferably, the oil pump assembly includes an oil pump body and an oil suction pipe; the oil pump body is mounted on the upper oil pan, the first end of the oil suction pipe is connected to the oil pump body, and the second end of the oil suction pipe extends between the upper oil pan and the lower oil pan.

[0016] An engine assembly comprises an engine and the lubrication system; the lubrication system is installed on the engine.

[0017] An aircraft comprises the engine assembly.

[0018] A car comprising the engine assembly

[0019] The oil pan structure provided by the embodiment of the present invention is applied to the engine, specifically installed at the bottom of the engine, and is detachably connected to the engine, sealing the engine as the outer shell of the oil storage tank. The oil pan structure specifically includes an upper oil pan, a lower oil pan and a valve plate assembly; the upper oil pan is connected to the lower oil pan, and the two cooperate to form a closed accommodating cavity for storing lubricating oil. An oil return port is provided on the upper oil pan, and the lubricating oil at the engine can be smoothly returned through the oil return port, so that the lubricating oil can be recycled. The valve plate assembly is rotatably mounted on the upper oil pan and matched with the oil return port. This setting can rotate the valve plate assembly to different postures according to the real-time status of the oil pan structure, so that the oil return port is in a blocked state or an open state, meeting the requirement that the oil pump assembly can draw the lubricating oil in the accommodating cavity to lubricate the engine, thereby ensuring normal lubrication of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. 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 these drawings without paying any creative labor.

[0021] Figure 1 This is an exploded view of a lubrication system in one embodiment of the present invention;

[0022] Figure 2 This is a first state diagram of the valve plate assembly in one embodiment of the present utility model;

[0023] Figure 3 This is a second state diagram of the valve plate assembly in one embodiment of the present utility model;

[0024] Figure 4 This is a top view of the upper oil pan in one embodiment of the present utility model;

[0025] Figure 5 This is a top view of the lower oil pan in one embodiment of the present utility model;

[0026] Figure 6 It is a top view of the valve plate assembly in one embodiment of the present utility model.

[0027] Among them, 1. upper oil pan; 11. first depression; 12. second depression; 2. lower oil pan; 3. valve plate assembly; 31. mounting seat; 32. valve plate body; 4. oil pan baffle; 5. oil pump assembly; 51. oil pump body; 52. oil suction pipe; 521. first oil pipe; 522. second oil pipe. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0029] In the description of the present invention, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0030] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] The utility model embodiment provides an oil pan structure, referring to Figure 1 、 Figure 2 、 Figure 3 and Figure 5 The oil pan structure includes an upper oil pan 1, a lower oil pan 2 and a valve plate assembly 3; the upper oil pan 1 is connected to the lower oil pan 2, and an oil return port is provided on the upper oil pan 1; the valve plate assembly 3 can be rotatably mounted on the upper oil pan 1 and matched with the oil return port to keep the oil return port in a blocked state or an open state.

[0032] As an example, the oil pan structure is applied to an engine, specifically installed at the bottom of the engine, detachably connected to the engine, and sealing the engine as the outer shell of the oil storage tank. The oil pan structure specifically includes an upper oil pan 1, a lower oil pan 2, and a valve plate assembly 3; the upper oil pan 1 is connected to the lower oil pan 2, and the two cooperate to form a closed accommodating cavity for storing lubricating oil. The upper oil pan 1 is provided with an oil return port, through which the lubricating oil in the engine can be smoothly returned, allowing the lubricating oil to be recycled. The valve plate assembly 3 is rotatably mounted on the upper oil pan 1 and matched with the oil return port. This setting allows the valve plate assembly 3 to be rotated to different postures according to the real-time status of the oil pan structure, so that the oil return port is in a blocked state or an open state, meeting the requirement that the oil pump assembly 5 can draw lubricating oil from the accommodating cavity to lubricate the engine, thereby ensuring normal lubrication of the engine.

[0033] For example, when the engine is horizontal or at a slight tilt angle, the valve plate assembly 3 is in an open state due to its own weight and the weight of the lubricating oil on the upper oil pan 1. The lubricating oil returns smoothly through the oil return port, ensuring that the oil suction port of the oil pump assembly 5 can smoothly draw the lubricating oil, thereby ensuring normal lubrication of the engine. When the engine is at an extremely large tilt angle or experiences a short period of high acceleration (such as a car accelerating, braking, or turning quickly on a racetrack), the valve plate assembly 3 will close under the hydraulic pressure of the lubricating oil in the accommodating chamber, preventing the lubricating oil from flowing out of the accommodating chamber. The lubricating oil in the accommodating chamber is deflected to one side of the accommodating chamber, ensuring that the oil suction port of the oil pump assembly 5 can draw lubricating oil for a short period of time, thereby ensuring normal lubrication of the engine under these operating conditions, thereby improving the engine's cornering performance and reliability. When the engine is used in a certain negative overload situation (such as an aircraft), the engine is in a state of weightless acceleration (specifically, the weightless acceleration reaches 1g). At this time, the valve plate assembly 3 loses gravity and is in a closed state. The lubricating oil in the accommodating cavity is on the upper surface of the accommodating cavity. At this time, the oil pump assembly 5 can still maintain its oil suction capacity for a short time, thereby ensuring normal lubrication of the engine in this situation, thereby expanding the engine's usage scenarios.

[0034] In one embodiment, referring to Figure 2 、 Figure 3 and Figure 6 The valve plate assembly 3 includes a mounting seat 31 and a valve plate body 32; the mounting seat 31 is fixed on the upper oil pan 1, and one end of the valve plate body 32 can be rotatably mounted on the mounting seat 31; the valve plate body 32 matches the oil return port so that the oil return port is in a blocked state or an open state.

[0035] As an example, the valve plate assembly 3 includes a mounting base 31 and a valve plate body 32. During installation, the mounting base 31 is fixed to the upper oil pan 1, specifically by rivets or bolts. One end of the valve plate body 32 is rotatably mounted on the mounting base 31. Specifically, an opening is provided on the mounting base 31, and a rotating shaft is provided on the inner wall of the opening. One end of the valve plate body 32 is sleeved on the rotating shaft. Alternatively, a rotating shaft is provided at one end of the valve plate body 32, and a slot is provided on the inner wall of the opening of the mounting base 31, and the rotating shaft is embedded in the slot. The valve plate body 32 matches the oil return port. This setting allows the valve plate body 32 to rotate to different postures according to the real-time status of the oil pan structure, so that the oil return port is in a blocked state or an open state, meeting the requirement that the oil pump assembly 5 can draw lubricating oil from the accommodating cavity to lubricate the engine, thereby ensuring normal lubrication of the engine.

[0036] During design, the structural form of the valve plate assembly 3 is selected according to actual needs. The valve plate assembly 3 can be configured as either a diaphragm or a movable valve plate, as long as the oil return port can be placed in a blocked or open state. The diaphragm can be a metal diaphragm or a rubber diaphragm.

[0037] In one embodiment, referring to Figure 4 The number of the valve plate assemblies 3 is at least two, and at least two valve plate assemblies 3 are arranged on the upper oil pan 1 at intervals.

[0038] As an example, at least two valve plate assemblies 3 are provided, and at least two valve plate assemblies 3 are spaced apart on the upper oil pan 1. That is, at least two oil return ports are spaced apart on the upper oil pan 1. This arrangement improves lubricating oil return to the engine. Specifically, four valve plate assemblies 3 are provided, and the four valve plate assemblies 3 are spaced apart in a rectangular shape on the upper oil pan 1, which achieves a more balanced lubricating oil return to the engine.

[0039] In one embodiment, referring to Figure 2 and Figure 3 The oil pan structure further includes an oil pan baffle 4 ; the oil pan baffle 4 is mounted on the upper oil pan 1 , or the oil pan baffle 4 is integrally formed with the upper oil pan 1 ; the oil return port is provided on the oil pan baffle 4 .

[0040] As an example, the oil pan structure also includes an oil pan baffle 4. This baffle 4 is designed in two ways: one in which the oil pan baffle 4 is directly mounted on the upper oil pan 1, and the other in which the oil pan baffle 4 and the upper oil pan 1 are integrally formed. An oil return port is provided on the oil pan baffle 4. This arrangement not only allows lubricating oil from the engine to flow back into the oil pan structure, but also prevents impact and splashing of the lubricating oil, promotes the settling of impurities, and facilitates oil level inspection.

[0041] In one embodiment, referring to Figure 2 and Figure 3 A first recess 11 and a second recess 12 are provided on one side of the upper oil pan 1 away from the lower oil pan 2, and the depth of the first recess 11 is greater than the depth of the second recess 12; the first recess 11 is used to install the oil pump assembly 5, and the valve plate assembly 3 is provided on the first recess 11 and the second recess 12.

[0042] As an example, a first recess 11 and a second recess 12 are provided on one side of the upper oil pan 1 away from the lower oil pan 2. During design, the depth of the first recess 11 is greater than the depth of the second recess 12. The first recess 11 is used to install the oil pump assembly 5, which facilitates the installation of the oil pump assembly 5, so that the oil pump assembly 5 is embedded in the upper oil pan 1, reducing the space occupied by the equipment; the first recess 11 and the second recess 12 can effectively gather the lubricating oil at the engine, and through the rotation of the valve plate assembly 3, control the oil return port to be in a blocked state or an open state, so as to ensure that the lubricating oil at the engine can be smoothly returned through the oil return port, so that the lubricating oil can be recycled; meet the requirement that the oil pump assembly 5 can draw the lubricating oil in the accommodating cavity to lubricate the engine, and ensure normal lubrication of the engine.

[0043] The present invention provides a lubrication system. Figure 1 、 Figure 2 and Figure 3 , including an oil pump assembly 5 and an oil pan structure; the oil pump assembly 5 is installed on the oil pan structure.

[0044] As an example, a lubrication system is used in an engine and specifically includes an oil pump assembly 5 and an oil pan structure. During installation, the oil pump assembly 5 is mounted on the oil pan structure, located at the bottom of the engine and removably connected to the engine. Specifically, it is mounted within the first recess 11 of the upper oil pan 1. The oil pan structure specifically includes an upper oil pan 1, a lower oil pan 2, and a valve plate assembly 3. The upper oil pan 1 and the lower oil pan 2 are connected, and the two cooperate to form a closed storage chamber for storing lubricating oil. The upper oil pan 1 is provided with an oil return port, through which lubricating oil from the engine can be smoothly returned, allowing the lubricating oil to be recycled. The valve plate assembly 3 is rotatably mounted on the upper oil pan 1 and matched with the oil return port. This arrangement allows the valve plate assembly 3 to rotate to different positions depending on the current state of the oil pan structure, such that the oil return port is blocked or opened, ensuring that the oil pump assembly 5 can draw lubricating oil from the storage chamber to lubricate the engine, thereby ensuring proper engine lubrication. For example, when the engine is horizontal or at a slight tilt angle, the valve plate assembly 3 is in an open state due to its own weight and the weight of the lubricating oil on the upper oil pan 1. The lubricating oil returns smoothly through the oil return port, ensuring that the oil suction port of the oil pump assembly 5 can smoothly draw the lubricating oil, thereby ensuring normal lubrication of the engine. When the engine is at an extremely large tilt angle or experiences a short period of high acceleration (such as a car accelerating, braking, or turning quickly on a racetrack), the valve plate assembly 3 will close under the hydraulic pressure of the lubricating oil in the accommodating chamber, preventing the lubricating oil from flowing out of the accommodating chamber. The lubricating oil in the accommodating chamber is deflected to one side of the accommodating chamber, ensuring that the oil suction port of the oil pump assembly 5 can draw lubricating oil for a short period of time, thereby ensuring normal lubrication of the engine under these operating conditions, thereby improving the engine's cornering performance and reliability. When the engine is used in a certain negative overload situation (such as an aircraft), the engine is in a state of weightless acceleration (specifically, the weightless acceleration reaches 1g). At this time, the valve plate assembly 3 loses gravity and is in a closed state. The lubricating oil in the accommodating cavity is on the upper surface of the accommodating cavity. At this time, the oil pump assembly 5 can still maintain its oil suction capacity for a short time, thereby ensuring normal lubrication of the engine in this situation, thereby expanding the engine's usage scenarios.

[0045] In one embodiment, referring to Figure 1 、 Figure 2 and Figure 3The oil pump assembly 5 includes an oil pump body 51 and an oil suction pipe 52; the oil pump body 51 is installed on the upper oil pan 1, the first end of the oil suction pipe 52 is connected to the oil pump body 51, and the second end of the oil suction pipe 52 extends between the upper oil pan 1 and the lower oil pan 2.

[0046] As an example, the oil pump assembly 5 includes an oil pump body 51 and an oil suction pipe 52; during installation, the oil pump body 51 is installed on the upper oil pan 1, specifically in the first recess 11, the first end of the oil suction pipe 52 is connected to the oil pump body 51, and the second end of the oil suction pipe 52 extends to between the upper oil pan 1 and the lower oil pan 2, so that the oil pump body 51 sucks out the lubricating oil in the oil pan structure through the oil suction pipe 52 and flows to the engine to lubricate the engine.

[0047] In one example, referring to Figure 1 、 Figure 2 and Figure 3 The oil suction pipe 52 includes a first oil pipe 521 and a second oil pipe 522; when installed, the first end of the first oil pipe 521 is connected to the oil pump body 51, the first end of the second oil pipe 522 is close to the upper oil pan 1, and the second end of the second oil pipe 522 is close to the lower oil pan 2. This arrangement makes the oil suction port of the oil suction pipe 52 located at the lower part of the oil pan structure, which is convenient for sucking out the lubricating oil in the oil pan structure and flowing it to the engine to lubricate the engine.

[0048] An embodiment of the utility model provides an engine assembly, comprising an engine and a lubrication system; the lubrication system is installed on the engine.

[0049] As an example, an engine assembly includes an engine and a lubrication system; the lubrication system includes an oil pump assembly 5 and an oil sump structure. During installation, the oil pump assembly 5 is mounted on the oil sump structure, located at the bottom of the engine and removably connected to the engine, specifically within the first recess 11 of the upper oil sump 1. The oil sump structure is mounted on the engine block and specifically includes an upper oil sump 1, a lower oil sump 2, and a valve plate assembly 3. The upper oil sump 1 and the lower oil sump 2 are connected to form a closed chamber for storing lubricating oil. The upper oil sump 1 is provided with an oil return port, which allows lubricating oil from the engine to be smoothly returned through the oil return port, allowing the lubricating oil to be recycled. The valve plate assembly 3 is rotatably mounted on the upper oil pan 1, aligned with the oil return port. This arrangement allows the valve plate assembly 3 to be rotated to different positions depending on the real-time state of the engine, i.e., the real-time state of the oil pan structure, so that the oil return port is either blocked or open. This ensures that the oil pump assembly 5 can draw lubricating oil from the accommodating chamber to lubricate the engine, thereby ensuring proper lubrication of the engine. For example, when the engine is horizontal or at a slight inclination, the valve plate assembly 3 is in an open position due to its own weight and the weight of the lubricating oil in the upper oil pan 1. The lubricating oil can be smoothly returned through the oil return port, ensuring that the oil pump assembly 5 can smoothly draw lubricating oil to the oil suction port, thereby ensuring proper lubrication of the engine. When the engine is at an extremely large tilt angle or undergoes a short period of high acceleration (such as when a car is accelerating, braking, or cornering rapidly on a racetrack), the valve plate assembly 3 closes under the hydraulic pressure of the lubricating oil in the chamber, preventing the lubricating oil from flowing out of the chamber. The lubricating oil in the chamber is deflected to one side of the chamber, ensuring that the oil pump assembly 5 can extract lubricating oil for a short period of time, thereby ensuring normal engine lubrication under these operating conditions and improving the engine's cornering performance and reliability. When the engine is used in certain negative overload situations (such as aircraft), the engine is subjected to a state of weightless acceleration (specifically, weightless acceleration reaching 1g). At this time, the valve plate assembly 3 loses gravity and is in a closed state. The lubricating oil in the chamber is located on the upper surface of the chamber. At this time, the oil pump assembly 5 can still maintain its short-term oil suction capacity, ensuring normal engine lubrication in this situation, thereby expanding the engine's usage scenarios. It can also improve the engine's racing performance and ensure that the engine's lubrication system will not fail under intense driving conditions, thereby improving the vehicle's extreme performance.

[0050] An embodiment of the present utility model provides an aircraft, including an engine assembly.

[0051] As an example, when the engine is used on an aircraft, the engine is in a state of weightless acceleration (specifically, the weightless acceleration reaches 1g). At this time, the valve plate assembly 3 loses gravity and is in a closed state. The lubricating oil in the accommodating cavity is on the upper surface of the accommodating cavity. At this time, the oil pump assembly 5 can still maintain its oil suction capacity for a short time, thereby ensuring normal lubrication of the engine under this condition, thereby expanding the engine's usage scenarios; it can improve the engine's track performance and ensure that the engine's lubrication system will not fail even under intense driving conditions, thereby improving the vehicle's extreme performance.

[0052] An embodiment of the utility model provides a car, including an engine assembly.

[0053] As an example, when the engine is at an extremely large tilt angle or has a large acceleration in a short period of time (such as a car accelerating, braking suddenly or turning quickly on a racetrack), the valve plate assembly 3 will be closed under the action of the liquid pressure of the lubricating oil in the accommodating cavity, preventing the lubricating oil from flowing out of the accommodating cavity. The lubricating oil in the accommodating cavity is biased to one side of the accommodating cavity, ensuring that the oil suction port of the oil pump assembly 5 has lubricating oil extracted in a short period of time, thereby ensuring normal lubrication of the engine under this working condition, thereby improving the engine's cornering performance and reliability.

[0054] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. An oil pan structure, characterized in that: Includes upper oil pan, lower oil pan and valve plate assembly; The upper oil pan is connected to the lower oil pan, and the upper oil pan is provided with an oil return port; The valve plate assembly can be rotatably mounted on the upper oil pan and matched with the oil return port so that the oil return port is in a blocked state or an open state.

2. The oil sump structure according to claim 1, characterized in that: The valve plate assembly includes a mounting seat and a valve plate body; The mounting seat is fixed on the upper oil pan, and one end of the valve plate body is rotatably mounted on the mounting seat; The valve plate body matches the oil return port so that the oil return port is in a blocked state or an open state.

3. The oil sump structure according to claim 1, characterized in that: The number of the valve plate assemblies is at least two, and at least two of the valve plate assemblies are arranged on the upper oil pan at intervals.

4. The oil sump structure according to claim 1, characterized in that: The oil pan structure further includes an oil pan baffle; the oil pan baffle is mounted on the upper oil pan, or the oil pan baffle and the upper oil pan are integrally formed; the oil return port is provided on the oil pan baffle.

5. The oil sump structure according to claim 1, characterized in that: A first recess and a second recess are provided on a side of the upper oil pan away from the lower oil pan, and the depth of the first recess is greater than the depth of the second recess; the first recess is used to install the oil pump assembly, and the valve plate assembly is provided on both the first recess and the second recess.

6. A lubrication system, characterized in that: It comprises an oil pump assembly and the oil pan structure according to any one of claims 1 to 5; the oil pump assembly is mounted on the oil pan structure.

7. The lubrication system according to claim 6, characterized in that The oil pump assembly includes an oil pump body and an oil suction pipe; the oil pump body is installed on the upper oil pan, the first end of the oil suction pipe is connected to the oil pump body, and the second end of the oil suction pipe extends between the upper oil pan and the lower oil pan.

8. An engine assembly, characterized in that: The invention comprises an engine and a lubrication system according to any one of claims 6 to 7; the lubrication system is installed on the engine.

9. An aircraft, characterized in that: Includes the engine assembly described in claim 8.

10. An automobile, characterized in that: Includes the engine assembly described in claim 8.

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