Engine, hybrid powertrain, and vehicle

Abstract

An engine (100), comprising: an engine body (1) provided with an accommodating cavity (12) and a first passage (11); an oil pan (2), wherein the oil pan (2) is used for storing engine oil, the oil pan (2) is provided with a second passage (21) for discharging the engine oil, and when the engine (100) is in a shutdown state, the engine oil in the oil pan (2) is discharged through the second passage (21); a first pump (5), wherein when the engine (100) is in a working state, the first pump (5) is used for pumping the engine oil in the accommodating cavity (12) into the first passage (11); and a second pump (6), wherein when the engine (100) is in the working state, the second pump (6) is used for pumping the engine oil in the oil pan (2) into the first passage (11). The engine (100) solves the problem of abnormal noise caused by oil-gas mixing during the initial stage of engine startup. Also provided are a hybrid powertrain (200) and a vehicle (300).

Description

Engines, hybrid powertrains and vehicles

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202510381191.9, filed with the Chinese Patent Office on March 27, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of vehicle technology, and more particularly to an engine, a hybrid powertrain, and a vehicle. Background Technology

[0004] The engine oil pan, as a crucial component, primarily stores and provides the lubricating oil needed for the engine's working cycle. Currently, the oil pan is typically located at the bottom of the engine block; after lubrication, the lubricating oil in the cylinders returns to the oil pan under gravity.

[0005] However, this setup causes abnormal noises during the initial engine startup. Summary of the Invention

[0006] This application provides an engine capable of switching between an operating state and a stopped state; the engine includes a body, an oil pan, a first pump, and a second pump; the body has a receiving cavity and a first channel; the oil pan is used to store engine oil, and the oil pan has a second channel for draining the engine oil; when the engine is in the stopped state, the engine oil in the oil pan is drained through the second channel; when the engine is in the operating state, the first pump is used to draw the engine oil in the receiving cavity into the first channel; when the engine is in the operating state, the second pump is used to draw the engine oil in the oil pan into the first channel.

[0007] This application also provides an engine, which includes a body, an oil pan, a first pump, and a second pump; the body has a receiving cavity and a first channel; the oil pan is used to store engine oil and has a second channel for discharging engine oil; the first pump is used to draw engine oil from the receiving cavity into the first channel; and the second pump is used to draw engine oil from the oil pan into the first channel.

[0008] This application also provides a hybrid powertrain, which includes the engine as described above, or the engine as described above.

[0009] This application also provides a vehicle that includes the engine as described above, or includes the engine as described above, or includes the hybrid powertrain as described above.

[0010] The engine provided in this application, when in operation, uses a first pump to draw oil from the receiving chamber into a first channel, and a second pump to draw oil from the oil pan into the first channel, with oil from different areas converging in the first channel. However, initially, when the engine is running, since there is no oil in the receiving chamber but some oil remains in the oil pan, the first pump pumps air into the first channel, and the second pump draws oil into the first channel, causing oil and air to mix and produce a loud abnormal noise. To address this, this application drains the oil when the engine is off, ensuring that both the first and second pumps draw air into the first channel during the initial engine startup. This prevents the air from mixing and causing a loud abnormal noise, thus avoiding oil-air mixing and resolving the abnormal noise problem caused by oil-air mixing during engine startup. Attached Figure Description

[0011] Figure 1 is a schematic diagram of the engine provided in some embodiments of this application.

[0012] Figure 2 is a schematic diagram of the engine provided in some embodiments of this application.

[0013] Figure 3 is a schematic diagram of the working process of the engine provided in some embodiments of this application.

[0014] Figure 4 is a schematic diagram of the working process of the engine provided in some embodiments of this application.

[0015] Figures 5 and 6 are schematic diagrams of the engine body from two perspectives in some embodiments of this application;

[0016] Figure 7 is a structural schematic diagram of the vehicle provided in some embodiments of this application;

[0017] Figure 8 is a structural schematic diagram of a vehicle provided in some other embodiments of this application.

[0018] Explanation of reference numerals in the attached drawings: 100, Engine; 101, Drive shaft; 102, Cylinder block; 103, Cylinder head; 1, Engine block; 11, First channel; 12, Receiving cavity; 2, Oil pan; 21, Second channel; 3, Oil reservoir; 4, Fuel supply pump; 5, First pump; 6, Second pump; 7, Third pump; 8, Valve; 9, Fuel tank; 200, Hybrid assembly; 300, Vehicle. Detailed Implementation

[0019] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0020] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, where the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, where the first feature is at a lower horizontal level than the second feature.

[0021] In the description of some embodiments of this application, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. These terms are used for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive distinction and have no special meaning.

[0022] The following description, with reference to FIG1, describes an engine 100 according to some embodiments of the present application. When the engine 100 is in a stopped state, the oil in the oil pan 2 is drained through the second channel 21. This ensures that both the first pump 5 and the second pump 6 pump gas into the first channel 11 during the initial start-up of the engine 100, preventing oil-gas mixing and thus solving the problem of abnormal noise caused by oil-gas mixing during the initial start-up of the engine 100.

[0023] As shown in Figure 1, an engine 100 according to some embodiments of this application includes: a body 1, a first channel 11, a receiving cavity 12, an oil pan 2, a second channel 21, a first pump 5, and a second pump 6, etc.

[0024] The engine 100 is capable of switching between an operating state and a stopped state; the engine 100 includes a body 1, an oil pan 2, a first pump 5, and a second pump 6; the body 1 has a receiving cavity 12 and a first channel 11; the oil pan 2 is used to store engine oil, and the oil pan 2 has a second channel 21 for draining engine oil; when the engine 100 is in the stopped state, the engine oil in the oil pan 2 is drained through the second channel 21; when the engine 100 is in the operating state, the first pump 5 is used to draw the engine oil in the receiving cavity 12 into the first channel 11; when the engine 100 is in the operating state, the second pump 6 is used to draw the engine oil in the oil pan 2 into the first channel 11.

[0025] As shown in Figure 1, the engine block 100 has a housing 12 containing components to be lubricated, such as a camshaft or crankshaft. The housing 12 can be a camshaft housing or a crankshaft housing. When the engine is running, the housing 12 contains oil, which lubricates the components. Then, some of the oil in the housing 12 is drawn into the first channel 11 by the first pump 5, while the remaining oil, which is difficult for the first pump 5 to draw in, flows to the oil pan 2 under gravity. Furthermore, the oil flowing into the oil pan 2 under gravity is drawn into the first channel 11 by the second pump 6. The oil collected in the first channel 11 can participate in the next cycle.

[0026] To ensure that the oil that is difficult to be drawn by the first pump 5 can flow back smoothly into the oil pan 2, the oil pan 2 is installed below the body 1 in the direction of gravity.

[0027] When engine 100 is used in vehicles and other equipment, it operates in a start-stop mode, meaning it can switch between a working state and a stopped state. Furthermore, when engine 100 is used in hybrid vehicles, its start-stop frequency is significantly higher than when engine 100 is used in gasoline vehicles.

[0028] When the engine 100 enters the shutdown state, the first pump 5 and the second pump 6 stop working. At this time, the oil in the receiving cavity 12 slowly flows back into the oil pan 2 under the action of gravity. There is basically no oil residue in the receiving cavity 12, while the oil pan 2 contains the oil that has flowed back from the receiving cavity 12.

[0029] At this time, if the engine 100 is started directly, and the engine 100 enters the working state, in the initial stage when the engine just enters the working state, that is, when the receiving cavity 12 has not yet received the oil for lubricating the parts to be lubricated, since there is no oil in the receiving cavity 12, while the oil pan 2 contains the oil that flowed back into the oil pan 2 during the shutdown state, the first pump 5 will draw the air in the receiving cavity 12 into the first channel 11, and the second pump 6 will draw the oil in the oil pan 2 into the first channel 11. As a result, the oil and air will mix in the first channel 11. The mixing of the two different forms of media will cause severe abnormal noise and affect the NVH performance of the engine 100.

[0030] Since the engine 100 has a high start-stop frequency when used in a hybrid vehicle, the NVH of the hybrid vehicle will be significantly affected.

[0031] To address the issue of abnormal noise during engine startup, this application provides an engine 100 with a second channel 21 on its oil pan 2 for draining engine oil. When the engine 100 is in a stopped state, the engine oil in the oil pan 2 is drained through the second channel 21, leaving the oil pan 2 and the receiving cavity 12 free of oil. In the initial stage of engine startup, a first pump 5 draws air from the receiving cavity 12 into the first channel 11, and a second pump 6 draws air from the oil pan 2 into the first channel 11. The air mixes within the first channel 11 without producing abnormal noise, thus preventing oil and air from mixing and resolving the abnormal noise problem caused by oil-air mixing during engine startup.

[0032] It should be noted that the time from when the engine 100 enters the working state to when the first pump 5 can draw oil is generally short, typically ranging from 5 to 60 seconds. The specific time varies depending on the oil supply capacity into the receiving cavity 12, with most cases taking 10 to 20 seconds. For example, the greater the power of the oil supply pump pumping oil into the receiving cavity 12, the shorter the time from when the engine 100 enters the working state to when the first pump 5 can draw oil.

[0033] It should be noted that after receiving the oil in the receiving cavity 12, the oil in the receiving cavity 12 cannot be immediately drawn into the first channel 11 by the first pump 5. Only when the oil in the receiving cavity 12 is above a certain amount can the first pump 5 draw the oil in the receiving cavity 12. At this time, some of the oil in the receiving cavity 12 can flow to the oil pan 2 under the action of gravity. Therefore, when the first pump 5 can draw the oil, the second pump 6 can also draw the oil. The first pump 5 and the second pump 6 can draw the same medium into the first channel 11 at basically the same time, and the abnormal noise problem of the engine 100 is basically solved.

[0034] It should be noted that when the engine 100 is in the stopped state, when draining the oil from the oil pan through the second channel 21, it is not necessary to drain all the oil from the oil pan 2. The goal is simply to ensure that the second pump 6 cannot draw oil during the initial stage when the engine 100 is just starting to operate. For example, the oil in the oil pan 2 can be drained until the oil level in the oil pan 2 is lower than the inlet of the second pump 6. Specifically, the oil level in the oil pan 2 can be determined using a sensor.

[0035] In some possible embodiments of this application, as shown in Figures 5 and 6, the engine body 1 includes a cylinder block 102, a cylinder head 103, and a housing for mounting a first pump 5 and a second pump 6. The oil pan 2 is located below the cylinder block 102 in the direction of gravity, and the cylinder head 103 can be located on the side of the cylinder block 102 opposite to the oil pan 2, i.e., the cylinder head 103, cylinder block 102, and oil pan 2 are arranged sequentially in the vertical direction; the cylinder head 103 can also be located in the horizontal direction of the cylinder block 102, with the horizontal direction perpendicular to the vertical direction. Both the cylinder block 102 and the cylinder head 103 are provided with receiving cavities 12. The engine oil in the receiving cavity 12 on the cylinder block 102 can flow back to the oil pan 2 under gravity. The first pump 5 is used to draw engine oil from the receiving cavity 12 on the cylinder head 103. The first channel 11 is provided on the housing, which has at least two oil inlets and one oil outlet. One oil inlet is connected to the inlet of the first pump 5, through which the first pump 5 draws oil from the cylinder head 103's internal cavity 12. The other oil inlet is connected to the inlet of the second pump 6, through which the second pump 6 draws oil from the oil pan 2. The oil outlet is located on the first channel 11, and the combined oil flows out through the oil outlet of the first channel 11.

[0036] Furthermore, in some embodiments, the housing is installed inside the oil pan 2 to improve the integration of the engine 100, therefore the housing is not shown in the accompanying drawings.

[0037] In some implementations, to ensure that the second pump 6 cannot draw oil when the engine 100 is just entering the working state, the oil in the oil pan 2 can be drained through the second channel 21 immediately when the engine 100 is just entering the shutdown state, or the oil in the oil pan 2 can be drained through the second channel 21 after the engine 100 has been in the shutdown state for a period of time, or the oil in the oil pan 2 can be drained through the second channel 21 when the engine 100 is about to enter the working state.

[0038] In some implementations, as shown in FIG3, after a first predetermined time T1 when the engine 100 enters the shutdown state, the oil in the oil pan 2 is drained through the second channel 21.

[0039] When the engine 100 just enters the shutdown state, the oil in the engine block 1 flows back to the oil pan 2 due to gravity for a return time T. This return time T is generally a few minutes, but it varies depending on the engine model and the operating conditions of the same engine. Therefore, to ensure that the oil in the oil pan 2 is completely drained or that the oil level in the oil pan 2 is low, after the engine 100 enters the shutdown state, the oil in the oil pan 2 is drained through the second channel 21 after a first predetermined time T1.

[0040] Furthermore, in some embodiments, the first predetermined time T1 is greater than the oil return time T. For example, the first predetermined time can be T1 = T + 10s. If the oil in the oil pan 2 is drained through the second channel 21 before the first predetermined time T1, the oil in the subsequent engine block 1 will flow to the oil pan 2 due to gravity, resulting in residual oil in the oil pan 2. This is not conducive to solving the problem of abnormal noise caused by oil-air mixing in the initial stage of engine 100 startup.

[0041] On the other hand, if the oil in the oil pan 2 is drained through the second channel 21 before the first predetermined time T1, and the time the engine 100 is in the off state is less than the first predetermined time T1 (i.e., the engine 100 starts before the first predetermined time), at this time, there is still oil in the engine block 1, but the oil in the oil pan 2 has been drained. The oil drawn from the engine block 1 by the first pump 5 mixes with the air drawn from the oil pan 2 by the second pump 6 in the first channel 11, which will also produce abnormal noise due to the oil-air mixture. Therefore, draining the oil in the oil pan 2 through the second channel 21 after the engine 100 has entered the off state for the first predetermined time T1 can better solve the problem of abnormal noise caused by the oil-air mixture during the initial start-up of the engine 100.

[0042] The first predetermined time T1 can be related to the oil return time T, or it can be a specific time related to the state or type of the engine 100.

[0043] In some embodiments of this application, as shown in FIG4, during a second predetermined time T2 before the engine 100 enters the working state, the oil in the oil pan 2 is drained through the second channel 21. Specifically, after receiving the start signal, the engine 100 first performs the oil draining action during the second predetermined time T2, and then the engine 100 starts. The length of the second predetermined time T2 is longer than the time required for the oil draining action. This allows the oil to be drained before the engine 100 starts, which is more conducive to solving the problem of abnormal noise caused by the oil-air mixture in the engine 100.

[0044] In engine products, if an oil draining action occurs while the engine is in a stopped state, and the engine 100 enters the working state after the oil draining, it can be considered that the oil in the oil pan is drained through the second channel 21 within the second predetermined time T2 before the engine 100 enters the working state.

[0045] Compared to the embodiment where the oil in the oil pan 2 is drained through the second channel 21 after a first predetermined time T1 when the engine 100 enters the shutdown state, this embodiment further ensures that no oil remains in the oil pan 2 when the engine 100 enters the operating state, but it delays the engine's start-up time. The embodiment where the oil in the oil pan 2 is drained through the second channel 21 after the first predetermined time T1 when the engine 100 enters the shutdown state does not delay the engine's start-up time, but may cause some oil that cannot naturally fall back into the oil pan 2 under gravity during vehicle movement to enter the oil pan 2 due to vibration, resulting in some oil remaining in the oil pan 2 and posing a risk of abnormal noise.

[0046] In some embodiments of this application, as shown in FIG1, the engine 100 further includes a third pump 7 connected to the second channel 21. When the engine 100 is in a stopped state, the third pump 7 is activated to discharge the oil in the oil pan 2 through the second channel 21.

[0047] The third pump 7 can be an electric pump. Its key feature is that its starting and stopping actions are not synchronized with the engine 100. Therefore, the third pump 7 can start when the engine 100 is stopped and drain the oil from the oil pan 2 through the second channel 21, thus resolving the abnormal noise problem caused by the oil-air mixture in the engine 100. Furthermore, the oil draining using the third pump 7 is more precise, reliable, and efficient, further contributing to solving the abnormal noise problem caused by the oil-air mixture in the engine 100.

[0048] On the other hand, in combination with the implementation method of draining the oil from the oil pan 2 through the second channel 21 within the second predetermined time T2 when the engine 100 is about to enter the working state, the power of the third pump 7 can be used to achieve rapid oil drainage, which can greatly reduce the time required for oil drainage, thereby reducing the second predetermined time T2, so that the engine 100 can start more quickly after receiving the start signal.

[0049] In some embodiments, as shown in FIG1, the engine 100 also includes an oil reservoir 3 for storing engine oil. When the engine 100 is in a stopped state, the third pump 7 is activated to discharge the engine oil in the oil pan 2 to the oil reservoir 7 through the second channel 21.

[0050] The engine oil is drained into the oil canister 3 and stored in the oil canister 3, which can effectively prevent engine oil waste or environmental pollution and realize the recycling of engine oil.

[0051] In some embodiments, as shown in FIG2, the engine 100 further includes a valve 8 disposed in the second channel 21. When the engine 100 is in a stopped state, the valve 8 is opened to discharge the oil in the oil pan 2 through the second channel 21.

[0052] Whether or not oil is discharged from the second channel 21 can be controlled by opening and closing valve 8. The opening and closing function of valve 8 can better utilize the function of the second channel 21 and is more conducive to solving the abnormal noise problem caused by the oil-air mixture in engine 100.

[0053] In some embodiments, as shown in FIG2, the engine 100 also includes an oil reservoir 3 for storing engine oil. When the engine is stopped, valve 8 is opened to discharge engine oil in the oil pan 2 through a second passage 21 to the oil reservoir 3.

[0054] The engine oil is drained into the oil canister 3 and stored in the oil canister 3, which can effectively prevent engine oil waste or environmental pollution and realize the recycling of engine oil.

[0055] In some embodiments, as shown in FIG1, the engine 100 further includes an oil reservoir 3 for storing engine oil. When the engine 100 is in a stopped state, the engine oil in the oil pan 2 is discharged to the oil reservoir 3 through the second channel 21. The first channel 11 is connected to the oil reservoir 3.

[0056] The first channel 11 is connected to the oil reservoir 3. When the engine 100 is running, after the oil in the receiving cavity 12 has completed its lubrication function, a portion of it is drawn into the first channel 11 by the first pump 5 and then flows back to the oil reservoir 3. The remaining portion of the oil in the receiving cavity 12 flows to the oil pan 2 due to gravity. The second pump 6 pumps the oil in the oil pan 2 into the first channel 11 and then back to the oil reservoir 3. When the engine 100 is running, the oil in the oil pan 2 is discharged to the oil reservoir 3 through the second channel 21. The engine oil of the engine 100 is stored in the oil reservoir 3, which avoids oil waste and environmental pollution. At the same time, the oil pan no longer needs to have the function of storing lubricating oil, and the oil pan does not need to occupy much Z-axis space, which is conducive to lowering the center of gravity of the vehicle, thereby enhancing the driving stability of the vehicle. At the same time, it can alleviate the problem of limited Z-axis space design of the vehicle.

[0057] In some embodiments, as shown in FIG1, the engine 100 further includes an oil supply pump 4, which pumps oil from the oil reservoir 3 into the housing cavity 12 of the engine body 1 when the engine 100 is in operation.

[0058] The oil supply pump 4 pumps the engine oil stored in the oil reservoir 3 to the receiving cavity 12 of the engine block 1 for lubricating the parts of the engine 100 to be lubricated. After the engine oil in the receiving cavity 12 has completed its lubrication function, a portion of it is drawn by the first pump 5 into the first channel 11 and finally flows back to the oil reservoir 3, thus achieving circulation. The other portion of the engine oil in the receiving cavity 12 flows to the oil pan 2 due to gravity, and the second pump 6 pumps the engine oil in the oil pan 2 into the first channel 11 and finally flows back to the oil reservoir 3. In this way, the engine oil can be repeatedly recycled. The recycling of engine oil can avoid the waste of engine oil and environmental pollution. At the same time, the oil supply pump 4 provides power for the circulation of engine oil, which is more conducive to promoting the circulation of engine oil. The engine oil participating in the circulation flow can also improve the lubrication effect and effectively avoid engine overheating, wear and abnormal noise caused by poor lubrication. In some embodiments, an oil filter device is also included to filter the circulating engine oil to ensure that the engine oil flowing to the parts to be lubricated is clean and free of impurities each time. It can effectively prevent abnormal noises caused by impurities when the parts to be lubricated are moving.

[0059] In some embodiments, as shown in Figure 2, the first channel 11 connects to the oil tank 9, and the oil supply pump 4 pumps the oil from the oil tank 9 into the receiving cavity 12 of the engine block 1. The oil pan 2 discharges the oil into the oil reservoir 3 through the second channel. In this case, there are two oil storage devices: the oil tank 9 and the oil reservoir 3. The oil in the oil tank 9 participates in the circulation. In this configuration, the oil reservoir 3 is placed to the side and below the oil pan 2, allowing the oil in the oil pan 2 to be discharged into the oil reservoir 3 by gravity through the second channel 21. Without the need for an additional electric pump, the overall structure of the engine 100 is more streamlined.

[0060] In some embodiments, as shown in FIG1, the engine 100 further includes an output shaft for outputting power, and the first pump 5 and the second pump 6 are driven by the output shaft, respectively.

[0061] Because the start and stop of the output shaft are synchronized with the engine 100, and the first pump 5 and the second pump 6 are driven by the output shaft respectively, the start and stop of the first pump 5 and the second pump 6 are synchronized with the engine 100. The first pump 5 and the second pump 6 operate synchronously and the power source comes from the engine 100, eliminating the need for an additional power source, making the structure more streamlined and reliable.

[0062] Because the starting and stopping of the first pump 5 and the second pump 6 are synchronized with the engine 100, it is impossible to control the operation of the first pump 5 and the second pump 6 independently. Therefore, it is easier for oil and gas to mix in the first channel 11, causing abnormal noise. Therefore, this application provides a second channel 21 in the oil pan 2 so that when the engine 100 is in a stopped state, the oil in the oil pan 2 can be drained through the second channel 21.

[0063] Specifically, in some embodiments, the output shaft is connected to the linkage shaft 101 for transmission. The linkage shaft 101 is respectively provided with a first pump 5 and a second pump 6. When the linkage shaft 101 rotates, it drives the first pump 5 and the second pump 6 to work.

[0064] According to a second aspect of this application, a hybrid powertrain 200 is provided, which includes an engine 100 as described in the first aspect, and the hybrid powertrain 200 has all the beneficial effects of the engine 100 provided in the first aspect, which will not be repeated here.

[0065] According to a third aspect of this application, a vehicle 300 is provided, as shown in FIG7, which includes an engine 100 as described in the first aspect, or as shown in FIG8, which includes a hybrid powertrain 200 as described in the second aspect. The vehicle 300 has all the beneficial effects of the engine 100 provided in the first aspect and all the beneficial effects of the hybrid powertrain 200 provided in the second aspect, which will not be elaborated further in this application.

[0066] The vehicle may be a gasoline vehicle, a plug-in hybrid vehicle, or a new energy vehicle, etc., and this application does not make any specific restrictions.

Claims

1. An engine (100), characterized in that, The engine (100) is capable of switching between an operating state and a stopped state; the engine (100) includes: The body (1) has a receiving cavity (12) and a first channel (11); An oil pan (2) is provided for storing engine oil and has a second channel (21) for draining the engine oil. When the engine (100) is in the stopped state, the engine oil in the oil pan (2) is drained through the second channel (21). The first pump (5), when the engine (100) is in the operating state, is used to draw oil from the receiving cavity (12) into the first channel (11); and The second pump (6) is used to draw oil from the oil pan (2) into the first channel (11) when the engine (100) is in the operating state.

2. The engine (100) according to claim 1, characterized in that, After a first predetermined time has elapsed since the engine (100) entered the shutdown state, the oil in the oil pan (2) is drained through the second channel (21); or During a second predetermined time when the engine (100) is about to enter the working state, the oil in the oil pan (2) is drained through the second channel (21).

3. The engine (100) according to any one of claims 1-2, characterized in that, It also includes a third pump (7) connected to the second channel (21), which, when the engine (100) is in the stopped state, starts the third pump (7) to discharge the oil in the oil pan (2) through the second channel (21).

4. The engine (100) according to claim 3, characterized in that, It also includes an oil reservoir (3) for storing engine oil. When the engine (100) is in the stopped state, the third pump (7) is started to discharge the engine oil in the oil pan (2) through the second channel (21) to the oil reservoir (3).

5. The engine (100) according to any one of claims 1-4, characterized in that, It also includes a valve (8) disposed in the second channel (21), which opens when the engine (100) is in the stopped state to discharge the oil in the oil pan (2) through the second channel (21).

6. The engine (100) according to claim 5, characterized in that, It also includes an oil reservoir (3) for storing engine oil, and when the engine (100) is in the stopped state, the valve (8) is opened to discharge the engine oil in the oil pan (2) through the second channel (21) to the oil reservoir (3).

7. The engine (100) according to any one of claims 1-4, characterized in that, It also includes an oil reservoir (3) for storing engine oil. When the engine (100) is in the stopped state, the engine oil in the oil pan (2) is discharged to the oil reservoir (3) through the second channel (21). The first channel (11) is connected to the oil reservoir (3).

8. The engine (100) according to claim 7, characterized in that, It also includes an oil supply pump (4), which pumps the oil in the oil reservoir (3) into the receiving cavity (12) of the engine body (1) when the engine (100) is in the working state.

9. The engine (100) according to any one of claims 1 to 8, characterized in that, It also includes an output shaft for outputting power outward, and the first pump (5) and the second pump (6) are respectively driven by the output shaft.

10. An engine (100), characterized in that, The engine (100) includes: The body (1) has a receiving cavity (12) and a first channel (11); An oil pan (2) is used to store engine oil and has a second channel (21) for draining the engine oil. A first pump (5) is used to draw oil from the receiving cavity (12) into the first channel (11); and The second pump (6) is used to draw the oil in the oil pan (2) into the first channel (11).

11. The engine (100) according to claim 10, characterized in that, Also includes: A third pump (7) is used to discharge engine oil from the oil pan (2) through the second channel (21); and / or, Valve (8) is disposed in the second channel (21).

12. A hybrid powertrain (200), characterized in that, Includes the engine (100) as described in any one of claims 1 to 11.

13. A vehicle (300), characterized in that, Includes the engine (100) according to any one of claims 1 to 11 or the hybrid powertrain (200) according to claim 12.

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