Engine, hybrid assembly and vehicle

Abstract

The invention discloses an engine, a hybrid power assembly and a vehicle, the engine comprises a component to be subjected to oil return and an oil return pump assembly, the component to be subjected to oil return is provided with a plurality of oil return areas, and at least part of the oil return areas are located at the two opposite ends of the component to be subjected to oil return; the oil return pump assembly is provided with an oil return opening, and the oil return opening is connected with the oil return areas at the two opposite ends. Therefore, at least part of the oil return areas are arranged at the two opposite ends of the component to be subjected to oil return respectively, so that the oil return pump assembly can return oil to the component to be subjected to oil return from different positions, the oil return efficiency can be improved, oil return dead angles are eliminated, the oil return pump assembly is not prone to air suction, and then the operation stability of an engine is guaranteed.

Description

[0001] Cross - reference to related applications

[0002] This invention is based on a Chinese patent application with the application number: 2023117600558 and the filing date of December 19, 2023, and claims the priority of this Chinese patent application. The entire content of this Chinese patent application is hereby incorporated into this invention by reference. Technical field

[0003] This invention relates to the technical field of vehicles, and particularly to an engine, a hybrid assembly, and a vehicle. Background art

[0004] In related technologies, in order to make the engine run smoothly, the engine is usually continuously lubricated. The lubricating oil flowing into the engine will fall into the oil pan, and the oil return pump is used to recover the lubricating oil in the oil pan to supply it back to the engine again. The oil return efficiency of the oil return pump will affect the lubrication effect and thus the running stability of the engine. Summary of the invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. For this reason, one objective of this invention is to provide an engine with high oil return efficiency, few oil return dead - ends, the oil return pump assembly is not easily sucked empty, and has good running stability.

[0006] The engine according to an embodiment of this invention includes: a component to be oil - returned, the component to be oil - returned is provided with a plurality of oil return areas, and at least part of the oil return areas are located at opposite ends of the component to be oil - returned; an oil return pump assembly, the oil return pump assembly has an oil return port, and the oil return port is respectively connected to the oil return areas at opposite ends.

[0007] The engine according to an embodiment of this invention, by arranging at least part of the oil return areas at opposite ends of the component to be oil - returned respectively, enables the oil return pump assembly to return oil to the component to be oil - returned from different positions, can improve the oil return efficiency, eliminate oil return dead - ends, and the oil return pump assembly is not easily sucked empty, thereby ensuring the running stability of the engine.

[0008] In the engine according to some embodiments of this invention, the component to be oil - returned includes an oil pan, and both the first end and the second end of the oil pan along the first direction are provided with the oil return areas, and the oil return port is respectively connected to the oil return area at the first end and the oil return area at the second end.

[0009] In the engine according to some embodiments of this invention, the oil return pump assembly includes a first oil return pump and a second oil return pump. The first oil return pump has a first oil return port, the second oil return pump has a second oil return port, the first oil return port is connected to the oil return area at the first end, and the second oil return port is connected to the oil return area at the second end.

[0010] An engine according to some embodiments of the present invention, at least two of the oil return regions are provided at the first end, the first oil return pump is provided with at least two of the first oil return ports, and at least two of the first oil return ports are connected to at least two of the oil return regions at the first end in a one-to-one correspondence; and / or, at least two of the oil return regions are provided at the second end, the second oil return pump is provided with at least two of the second oil return ports, and at least two of the first oil return ports are connected to at least two of the oil return regions at the second end in a one-to-one correspondence.

[0011] An engine according to some embodiments of the present invention, the first direction is the front-rear direction.

[0012] An engine according to some embodiments of the present invention, the component to be oil-returned includes a main cylinder block, and oil return regions are provided at both the third end and the fourth end of the main cylinder block along the second direction, and the oil return ports are respectively connected to the oil return regions at the third end and the oil return regions at the fourth end.

[0013] An engine according to some embodiments of the present invention, the oil return pump assembly includes a third oil return pump and a fourth oil return pump, the third oil return pump has a third oil return port, the fourth oil return pump has a fourth oil return port, the third oil return port is connected to the oil return region at the third end, and the fourth oil return port is connected to the oil return region at the fourth end.

[0014] An engine according to some embodiments of the present invention, at least two of the oil return regions are provided at the third end, the third oil return pump is provided with at least two of the third oil return ports, and at least two of the third oil return ports are connected to at least two of the oil return regions at the third end in a one-to-one correspondence; and / or, at least two of the oil return regions are provided at the fourth end, the fourth oil return pump is provided with at least two of the fourth oil return ports, and at least two of the fourth oil return ports are connected to at least two of the oil return regions at the fourth end in a one-to-one correspondence.

[0015] An engine according to some embodiments of the present invention, there are at least two of the third oil return ports, one of the third oil return ports is connected to the oil return region at the third end, and the other of the third oil return ports is connected to the oil return region at the fourth end.

[0016] An engine according to some embodiments of the present invention, wherein there are at least two fourth oil return ports, one of the fourth oil return ports is connected to the oil return area of the third end, and the other fourth oil return port is connected to the oil return area of the fourth end; the oil return area of the third end includes a first sub-area and a second sub-area oppositely arranged in a first direction, the first sub-area is connected to one of the third oil return ports, and the second sub-area is connected to one of the fourth oil return ports; the oil return area of the fourth end includes a third sub-area and a fourth sub-area oppositely arranged in the first direction, the third sub-area is connected to the other fourth oil return port, and the fourth sub-area is connected to the other third oil return port; wherein, the first direction and the second direction are perpendicularly arranged.

[0017] An engine according to some embodiments of the present invention, wherein the second direction is the left-right direction.

[0018] An engine according to some embodiments of the present invention, wherein the main cylinder block includes a left main cylinder block and a right main cylinder block, the left main cylinder block and the right main cylinder block are arranged side by side in the left-right direction, and the left main cylinder block and the right main cylinder block define a crankshaft cavity for installing a crankshaft; the second direction is the left-right direction, the third end is arranged on the left main cylinder block, and the fourth end is arranged on the right main cylinder block.

[0019] An engine according to some embodiments of the present invention, wherein the left main cylinder block includes a left cylinder body and a left cylinder head, the left cylinder head is covered on a side of the left cylinder body facing away from the right main cylinder block, and the third end is arranged on the left cylinder head; and / or, the right main cylinder block includes a right cylinder body and a right cylinder head, the right cylinder head is covered on a side of the right cylinder body facing away from the left main cylinder block, and the fourth end is arranged on the right cylinder head.

[0020] An engine according to some embodiments of the present invention, wherein the component to be oil-returned includes a main cylinder block and an oil pan, the oil pan is arranged at the bottom of the main cylinder block, and oil return areas are provided on both the oil pan and the main cylinder block; the number of oil return areas of the oil pan is multiple, and the multiple oil return areas on the oil pan are located at opposite ends of the oil pan, and the oil return ports are respectively connected to the oil return areas at opposite ends of the oil pan; or, the number of oil return areas of the main cylinder block is multiple, and the multiple oil return areas on the main cylinder block are located at opposite ends of the main cylinder block, and the oil return ports are respectively connected to the oil return areas at opposite ends of the main cylinder block; or, oil return areas are provided on both the main cylinder block and the oil pan, the oil return area of the main cylinder block and the oil return area of the oil pan are located at opposite ends, and the oil return ports are respectively connected to the oil return areas on the main cylinder block and the oil return areas on the oil pan at opposite ends.

[0021] An engine according to some embodiments of the present invention, wherein the component to be returned with oil includes a main cylinder block and an oil pan. The oil pan is provided at the bottom of the main cylinder block, and the oil return regions are provided on both the oil pan and the main cylinder block; the number of oil return regions of the oil pan is multiple, and the multiple oil return regions on the oil pan are located at opposite ends of the oil pan; the number of oil return regions of the main cylinder block is multiple, and the multiple oil return regions on the main cylinder block are located at opposite ends of the main cylinder block; the oil return pump assembly includes a first oil return pump, a second oil return pump, and a cylinder block oil return pump. The first oil return pump is communicated with the oil return region at one opposite end of the oil pan, and the second oil return pump is connected to the oil return region at the other opposite end of the oil pan; the cylinder block oil return pump is respectively connected to the oil return regions at opposite ends of the main cylinder block.

[0022] An engine according to some embodiments of the present invention, wherein the opposite ends of the oil pan are divided into a first end and a second end, and the first end and the second end are arranged opposite to each other in the front-rear direction; the first oil return pump and the second oil return pump are arranged in the front-rear direction, and the cylinder block oil return pump is located between the first oil return pump and the second oil return pump.

[0023] An engine according to some embodiments of the present invention, wherein the main cylinder block includes a left main cylinder block and a right main cylinder block. The left main cylinder block and the right main cylinder block are arranged in the left-right direction, and the left main cylinder block and the right main cylinder block define a crankshaft cavity for installing a crankshaft; the left main cylinder block is provided with an oil return region, and the oil return region of the left main cylinder block includes a first sub-region and a second sub-region arranged opposite to each other in the front-rear direction. The right main cylinder block is provided with an oil return region, and the oil return region of the right main cylinder block includes a third sub-region and a fourth sub-region arranged opposite to each other in the front-rear direction; the cylinder block oil return pump includes a third oil return pump and a fourth oil return pump. The third oil return pump and the fourth oil return pump are sequentially arranged in the front-rear direction between the first oil return pump and the second oil return pump. The third oil return pump includes two third oil return ports, the first sub-region is connected to one of the third oil return ports, and the fourth sub-region is connected to the other of the third oil return ports; the fourth oil return pump includes two fourth oil return ports, the second sub-region is connected to one of the fourth oil return ports, and the third sub-region is connected to the other of the fourth oil return ports.

[0024] An engine according to some embodiments of the present invention, wherein the left main cylinder block includes a left cylinder body and a left cylinder head. The left cylinder head is covered on the side of the left cylinder body facing away from the right main cylinder block, and the oil return region is provided on the left cylinder head; the right main cylinder block includes a right cylinder body and a right cylinder head. The right cylinder head is covered on the side of the right cylinder body facing away from the left main cylinder block, and the oil return region is provided on the right cylinder head; in the projection plane in the up-down direction, the projection regions of the left cylinder body and the right cylinder body cover the projection region of the oil pan.

[0025] An engine according to some embodiments of the present invention, the oil return pump assembly includes at least one oil return pump, and the oil return pump includes: a housing provided with an accommodation cavity, the housing is provided with a first oil inlet passage, a second oil inlet passage and an oil outlet passage communicating with the accommodation cavity, the first oil inlet passage and the second oil inlet passage are respectively located on opposite sides of the housing and both are formed with the oil return port; a first rotating member and a second rotating member, the first rotating member is disposed in the accommodation cavity for guiding oil from the first oil inlet passage to the oil outlet passage when rotating, and the second rotating member is disposed in the accommodation cavity for guiding oil from the second oil inlet passage to the oil outlet passage when rotating.

[0026] An engine according to some embodiments of the present invention, the inlet end of the oil outlet passage is located below the first rotating member and the second rotating member.

[0027] An engine according to some embodiments of the present invention, the first rotating member and the second rotating member are respectively formed as gears and are meshed with each other, and the inlet end of the oil outlet passage is located directly below the meshing portion of the first rotating member and the second rotating member.

[0028] An engine according to some embodiments of the present invention, one of the first rotating member and the second rotating member is a driving gear and the other is a driven gear.

[0029] An engine according to some embodiments of the present invention further includes: a first rotating shaft and a second rotating shaft, the first rotating shaft is a driving shaft, the driving gear is sleeved on the first rotating shaft and is in interference fit with the first rotating shaft, and / or, the driven gear is sleeved on the second rotating shaft and is key-connected to the second rotating shaft.

[0030] An engine according to some embodiments of the present invention, the accommodation cavity includes a first sub-cavity and a second sub-cavity that are communicated, in the same cross-section, the cross-sectional shape of the first sub-cavity and the cross-sectional shape of the second sub-cavity are both formed as circles, the inlet end of the oil outlet passage is located at the connection of the first sub-cavity and the second sub-cavity, and the cross-section is perpendicular to the rotation axis of the first rotating member.

[0031] An engine according to some embodiments of the present invention, one of the connections of the first sub-cavity and the second sub-cavity is formed as a guiding protrusion extending towards the inlet end of the oil outlet passage.

[0032] An engine according to some embodiments of the present invention, the first oil inlet passage and the second oil inlet passage are equidistantly arranged relative to the oil outlet passage.

[0033] The present invention also proposes a hybrid assembly.

[0034] The hybrid assembly according to an embodiment of the present invention includes: the engine according to any one of the above embodiments.

[0035] The hybrid assembly according to an embodiment of the present invention has high running stability and good overall performance, which is beneficial to improving the overall performance of the vehicle.

[0036] The present invention further provides a vehicle.

[0037] The vehicle according to an embodiment of the present invention includes: the engine according to any one of the above embodiments; or, the hybrid assembly according to any one of the above embodiments.

[0038] The vehicle according to an embodiment of the present invention has good running stability as a whole, which is beneficial to improving the brand image.

[0039] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0040] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0041] Figure 1 is a schematic diagram of the engine according to an embodiment of the present invention;

[0042] Figure 2 is a bottom view of the oil return pump assembly according to an embodiment of the present invention;

[0043] Figure 3 is a schematic diagram of the cooperation between the oil return pump assembly and the oil pan according to an embodiment of the present invention;

[0044] Figure 4 is a flow path simulation diagram of the oil return pump assembly and the oil pan according to an embodiment of the present invention;

[0045] Figure 5 is a flow path simulation diagram of the oil return pump assembly and the oil pan according to another embodiment of the present invention;

[0046] Figure 6 is a left view of the oil return pump assembly according to an embodiment of the present invention;

[0047] Figure 7 is a right view of the oil return pump assembly according to an embodiment of the present invention;

[0048] Figure 8 is a flow path simulation diagram of the oil return pump assembly and the main cylinder block according to an embodiment of the present invention;

[0049] Figure 9It is a flow path simulation diagram of an oil return pump assembly and a main cylinder block according to another embodiment of the present invention;

[0050] Figure 10 It is a cross-sectional view of an oil return pump according to an embodiment of the present invention;

[0051] Figure 11 It is an installation schematic diagram of a first rotating shaft and a second rotating shaft according to an embodiment of the present invention;

[0052] Figure 12 It is a schematic diagram of a receiving cavity according to an embodiment of the present invention;

[0053] Figure 13 It is an exploded view of a hybrid assembly according to an embodiment of the present invention.

[0054] Reference numerals:

[0055] Hybrid assembly 1000,

[0056] Engine 100, generator 200, first direction L1, second direction L2,

[0057] Oil return pump assembly 1, bottom wall 1a, oil return pump 11, bottom shell oil return pump 111, first oil return pump 1111, first oil return port 11111, second oil return pump 1112, second oil return port 11121,

[0058] Cylinder block oil return pump 112, third oil return pump 1121, third oil return port 11211, fourth oil return pump 1122, fourth oil return port 11221, oil return port 113,

[0059] Shell 12, receiving cavity 121, first sub-cavity 1211, second sub-cavity 1212, first oil inlet passage 122, second oil inlet passage 123, oil outlet passage 124, inlet end 124a, guiding protrusion 125, central hole 126,

[0060] Driving gear 13, driven gear 14, first rotating shaft 15, second rotating shaft 16, oil transportation space 17,

[0061] Main cylinder block 2, third end 2a, fourth end 2b, left cylinder block 21, left cylinder body 211, left cylinder head 212, right cylinder block 22, right cylinder body 221, right cylinder head 222, crankshaft cavity 23,

[0062] Oil pan 3, first end 3a, second end 3b. Detailed implementation manners

[0063] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0064] Next, with reference to the accompanying drawings, an engine 100 according to an embodiment of the present invention will be described.

[0065] As Figures 1 - 13 shown, an engine 100 according to an embodiment of the present invention includes: a component to be oil-returned and an oil return pump assembly 1. The component to be oil-returned is provided with a plurality of oil return areas, and at least part of the oil return areas are located at opposite ends of the component to be oil-returned; the oil return pump assembly 1 has an oil return port 113, and the oil return port 113 is respectively connected to the oil return areas at opposite ends.

[0066] Thereby, the oil return efficiency can be improved, and the oil return dead angle can be eliminated, so that the oil return pump assembly 1 is not easily sucked empty, thereby ensuring the operation stability of the engine 100.

[0067] First, as Figures 1 - 3 shown, the engine 100 includes a component to be oil-returned, and the component to be oil-returned is provided with a plurality of oil return areas, and at least part of the oil return areas are located at opposite ends of the component to be oil-returned. For example, the oil return areas can be set to four, two oil return areas are arranged at intervals at the front end of the component to be oil-returned, and two oil return areas are arranged at intervals at the rear end of the component to be oil-returned.

[0068] At the same time, the engine 100 further includes an oil return pump assembly 1 and an oil pot. The oil return pump assembly 1 is connected to the component to be oil-returned, the oil return pump assembly 1 is communicated with the oil pot, the oil return pump assembly 1 has an oil return port 113, and the oil return port 113 can be respectively communicated with the oil return areas at opposite ends, so that the oil return pump assembly 1 can return oil from a plurality of oil return areas simultaneously through the oil return port 113 and convey the recovered lubricating oil into the oil pot.

[0069] It should be noted that the component to be oil-returned can be any one of the main cylinder block 2 and the oil pan 3, or can include the main cylinder block 2 and the oil pan 3. The oil pan 3 is arranged at the lower part of the main cylinder block 2 and is communicated with the main cylinder block 2, so as to close the lower part of the main cylinder block 2 to prevent impurities from entering the lower part of the main cylinder block 2, and the oil pan 3 can be used to temporarily collect and store the lubricating oil flowing back from various lubricated parts (such as the crankshaft surface, intake VVT, exhaust VVT, etc.) in the main cylinder block 2.

[0070] Specifically, when the component to be oil-returned is the oil pan 3, the oil return pump assembly 1 can return oil to the oil pan 3; when the component to be oil-returned is the main cylinder block 2, the oil return pump assembly 1 can return oil to the main cylinder block 2; when the component to be oil-returned includes the oil pan 3 and the main cylinder block 2, the oil return pump assembly 1 can return oil to the oil pan 3 or return oil to the main cylinder block 2.

[0071] It can be understood that by respectively arranging at least part of the oil return areas at opposite ends of the component to be oil-returned, the oil return pump assembly 1 can return oil to the component to be oil-returned from different positions, improving the oil return efficiency and reducing the oil return dead corners. In addition, when the engine 100 is tilted, the oil return pump assembly 1 is not easily sucked empty, which is beneficial to improving the oil return stability.

[0072] For the engine 100 according to the embodiment of the present invention, by respectively arranging at least part of the oil return areas at opposite ends of the component to be oil-returned, the oil return pump assembly 1 can return oil to the component to be oil-returned from different positions, which can improve the oil return efficiency, eliminate the oil return dead corners, and the oil return pump assembly 1 is not easily sucked empty, thereby ensuring the operation stability of the engine 100.

[0073] In some embodiments of the present invention, as Figures 2 - 3 shown, the component to be oil-returned includes the oil pan 3. The two ends of the oil pan 3 along the first direction L1 are respectively a first end 3a and a second end 3b. Oil return areas are provided at both the first end 3a and the second end 3b, and the oil return ports 113 are respectively connected to the oil return areas at the first end 3a and the second end 3b. Thus, the oil return pump assembly 1 can return oil from both the first end 3a and the second end 3b of the oil pan 3 simultaneously, which can improve the oil return efficiency of the oil return pump assembly 1 and reduce the probability of the oil return pump assembly 1 being sucked empty, facilitating reducing the possibility of oil overflowing from the oil pan 3.

[0074] In some embodiments of the present invention, the oil return pump assembly 1 includes a first oil return pump 1111 and a second oil return pump 1112. The first oil return pump 1111 has a first oil return port 11111, and the second oil return pump 1112 has a second oil return port 11121. The first oil return port 11111 is connected to the oil return area at the first end 3a, and the second oil return port 11121 is connected to the oil return area at the second end 3b.

[0075] For example, as shown in Figures 2 - 5 the figure, the oil return pump assembly 1 includes an oil pan oil return pump 111. The oil pan oil return pump 111 includes a first oil return pump 1111 and a second oil return pump 1112. The first oil return pump 1111 and the second oil return pump 1112 are arranged at intervals along the first direction L1. The first oil return pump 1111 is arranged close to the first end 3a and has a first oil return port 11111, and the second oil return pump 1112 is arranged close to the second end 3b and has a second oil return port 11121.

[0076] Among them, the first oil return port 11111 of the first oil return pump 1111 can be connected to the oil return area of the first end 3a, so that the first oil return pump 1111 can be used to return the oil located at the first end 3a, and the second oil return pump 1112 can be connected to the oil return area of the second end 3b, so that the second oil return pump 1112 can be used to return the oil located at the second end 3b. Through the above settings, the flow path of the oil can be shortened, and the oil return efficiency can be improved.

[0077] In some embodiments of the present invention, as Figures 2 - 5 shown, the first end 3a is provided with at least two oil return areas, the first oil return pump 1111 is provided with at least two first oil return ports 11111, and the at least two first oil return ports 11111 are connected to the at least two oil return areas of the first end 3a in a one-to-one correspondence. Exemplarily, two oil return areas can be provided at the first end 3a, and two first oil return ports 11111 are provided on the first oil return pump 1111, and the two oil return areas of the first end 3a are connected to the two first oil return ports 11111 in a one-to-one correspondence.

[0078] Through the above settings, the oil return efficiency of the first oil return pump 1111 can be improved, and the first oil return pump 1111 is not easily blocked or sucked empty, and the reliability of the first oil return pump 1111 is improved.

[0079] In some embodiments of the present invention, as Figures 2 - 5 shown, the second end 3b is provided with at least two oil return areas, the second oil return pump 1112 is provided with at least two second oil return ports 11121, and the at least two first oil return ports 11111 are connected to the at least two oil return areas of the second end 3b in a one-to-one correspondence. Exemplarily, two oil return areas can be provided at the second end 3b, and two second oil return ports 11121 are provided on the second oil return pump 1112, and the two oil return areas of the second end 3b are connected to the two second oil return ports 11121 in a one-to-one correspondence.

[0080] Through the above settings, the oil return efficiency of the second oil return pump 1112 can be improved, and the second oil return pump 1112 is not easily blocked or sucked empty, and the reliability of the second oil return pump 1112 is improved.

[0081] In some embodiments of the present invention, as Figure 5 shown, the first end 3a and the second end 3b can be arranged at intervals in the front-rear direction. The first end 3a is provided with two oil return areas, the two oil return areas of the third end 3a are arranged at intervals in the left-right direction, and the second end 3b is provided with two oil return areas, and the two oil return areas of the second end 3b are arranged at intervals in the left-right direction.

[0082] Among them, the first oil return pump 1111 is provided with two first oil return ports 11111. One of the two first oil return ports 11111 is connected to the oil return area on the left side of the first end 3a, and the other is connected to the oil return area on the right side of the second end 3b. At the same time, the second oil return pump 1112 is provided with two second oil return ports 11121. One of the two second oil return ports 11121 is connected to the oil return area on the right side of the first end 3a, and the other is connected to the oil return area on the left side of the second end 3b.

[0083] Through the above settings, the two first oil return ports 11111 of the first oil return pump 1111 can be diagonally arranged, and the two second oil return ports 11121 of the second oil return pump 1112 can be diagonally arranged. In each extreme posture (uphill / downhill, left / right tilt), the oil return stability of the first oil return pump 1111 and the second oil return pump 1112 can be ensured, which is beneficial to avoiding problems such as cylinder flooding, dry grinding, abnormal noise, and insufficient oil pressure caused by poor oil return, and improves the reliability of the oil return pump assembly 1.

[0084] In some embodiments of the present invention, as Figure 3 shown, the first direction L1 can be set as the front-rear direction, so that the oil return pump assembly 1 can return oil to the oil pan 3 from the front and rear ends; or, the first direction L1 can be set as the left-right direction, so that the oil return pump assembly 1 can return oil to the oil pan 3 from the left and right ends. Thus, it is beneficial to meet different working conditions.

[0085] In some embodiments of the present invention, as Figure 1 shown, the component to be oil-returned includes the main cylinder block 2. The two ends of the main cylinder block 2 along the second direction L2 are the third end 2a and the fourth end 2b respectively. Both the third end 2a and the fourth end 2b are provided with oil return areas, and the oil return ports 113 are respectively connected to the oil return areas of the third end 2a and the fourth end 2b.

[0086] Through the above settings, the oil return pump assembly 1 can return oil from both the third end 2a and the fourth end 2b of the main cylinder block 2 at the same time, which can improve the oil return efficiency and oil return stability of the main cylinder block 2, is beneficial to increasing the circulation speed of the lubricating oil, and ensures the lubrication effect.

[0087] In some embodiments of the present invention, the oil return pump assembly 1 includes a third oil return pump 1121 and a fourth oil return pump 1122. The third oil return pump 1121 has a third oil return port 11211, and the fourth oil return pump 1122 has a fourth oil return port 11221. The third oil return port 11211 is connected to the oil return area of the third end 2a, and the fourth oil return port 11221 is connected to the oil return area of the fourth end 2b.

[0088] For example, referring to Figures 6 - 8As shown, the oil return pump assembly 1 includes a cylinder block oil return pump 112. The cylinder block oil return pump 112 includes a third oil return pump 1121 and a fourth oil return pump 1122. The third oil return pump 1121 and the fourth oil return pump 1122 are arranged at intervals along the first direction L1. The third oil return pump 1121 is disposed near the third end 2a and has a third oil return port 11211. The fourth oil return pump 1122 is disposed near the fourth end 2b and has a fourth oil return port 11221.

[0089] Among them, the third oil return port 11211 of the third oil return pump 1121 can be connected to the oil return area of the third end 2a, so that the third oil return pump 1121 can be used to return the oil located at the third end 2a. And the fourth oil return pump 1122 can be connected to the oil return area of the fourth end 2b, so that the fourth oil return pump 1122 can be used to return the oil located at the fourth end 2b. Through the above settings, the flow path of the lubricating oil can be shortened, and the oil return efficiency is improved.

[0090] In some embodiments of the present invention, referring to Figures 6 - 8 As shown, the third end 2a is provided with at least two oil return areas. The third oil return pump 1121 is provided with at least two third oil return ports 11211. The at least two third oil return ports 11211 are connected to the at least two oil return areas of the third end 2a in a one-to-one correspondence. Exemplarily, two oil return areas can be provided at the third end 2a, and two third oil return ports 11211 are provided on the third oil return pump 1121. The two oil return areas of the third end 2a are connected to the two third oil return ports 11211 in a one-to-one correspondence.

[0091] Through the above settings, the oil return efficiency of the third oil return pump 1121 can be improved, and the third oil return pump 1121 is not easily blocked or sucked empty, improving the reliability of the third oil return pump 1121.

[0092] In some embodiments of the present invention, referring to Figures 6 - 8 As shown, the fourth end 2b is provided with at least two oil return areas. The fourth oil return pump 1122 is provided with at least two fourth oil return ports 11221. The at least two fourth oil return ports 11221 are connected to the at least two oil return areas of the fourth end 2b in a one-to-one correspondence. Exemplarily, two oil return areas can be provided at the fourth end 2b, and two fourth oil return ports 11221 are provided on the fourth oil return pump 1122. The two oil return areas of the fourth end 2b are connected to the two fourth oil return ports 11221 in a one-to-one correspondence.

[0093] Through the above settings, the oil return efficiency of the fourth oil return pump 1122 can be improved, and the fourth oil return pump 1122 is not easily blocked or sucked empty, improving the reliability of the fourth oil return pump 1122.

[0094] In some embodiments of the present invention, such as Figure 6 、Figure 7 and Figure 9 As shown in Figure 9 , the number of the third oil return ports 11211 is at least two, one of the third oil return ports 11211 is connected to the oil return area of the third end 2a, and the other third oil return port 11211 is connected to the oil return area of the fourth end 2b, so that the third oil return pump 1121 can return oil to the third end 2a and the fourth end 2b of the main cylinder block 2 simultaneously. Thereby, the probability of the third oil return pump 1121 sucking air can be reduced, and the reliability of the third oil return pump 1121 can be improved.

[0095] In some embodiments of the present invention, the number of the fourth oil return ports 11221 is at least two, one of the fourth oil return ports 11221 is connected to the oil return area of the third end 2a, and the other fourth oil return port 11221 is connected to the oil return area of the fourth end 2b; the oil return area of the third end 2a includes a first sub - area and a second sub - area arranged in sequence along the first direction L1, the first sub - area is connected to one of the third oil return ports 11211, and the second sub - area is connected to one of the fourth oil return ports 11221; the oil return area of the fourth end 2b includes a third sub - area and a fourth sub - area arranged oppositely along the first direction L1, the third sub - area is connected to the other fourth oil return port 11221, and the fourth sub - area is connected to the other third oil return port 11211; wherein, the first direction L1 and the second direction L2 are perpendicularly arranged.

[0096] For example, referring to Figure 6 、 Figure 7 and Figure 9 As shown in Figure 7 and Figure 9 , the fourth oil return pump 1122 can be provided with at least two fourth oil return ports 11221, one of the fourth oil return ports 11221 is connected to the oil return area of the third end 2a, and the other fourth oil return port 11221 is connected to the oil return area of the fourth end 2b, so that the fourth oil return pump 1122 can return oil to the third end 2a and the fourth end 2b of the main cylinder block 2 simultaneously. Thereby, the probability of the fourth oil return pump 1122 sucking air can be reduced, and the reliability of the fourth oil return pump 1122 can be improved.

[0097] Wherein, the oil return area of the third end 2a can be set to include a first sub - area and a second sub - area, the first sub - area and the second sub - area are arranged oppositely along the first direction L1, the first sub - area is connected to one of the third oil return ports 11211, so that the third oil return pump 1121 can return oil to the first sub - area, and the second sub - area is connected to one of the fourth oil return ports 11221, so that the fourth oil return pump 1122 can return oil to the second sub - area.

[0098] Meanwhile, it is possible to set the oil return area of the fourth end 2b to include a third sub-area and a fourth sub-area. The third sub-area and the fourth sub-area are oppositely arranged along the first direction L1. The first sub-area and the fourth sub-area are located at the diagonal positions of the main cylinder block 2, and the second sub-area and the third sub-area are located at the diagonal positions of the main cylinder block 2. The third sub-area is connected to one of the other fourth oil return ports 11221 so that the fourth oil return pump 1122 can return oil from the third sub-area, and the fourth sub-area is connected to one of the other third oil return ports 11211 so that the third oil return pump 1121 can return oil from the fourth sub-area.

[0099] It should be noted that the first direction L1 is perpendicular to the second direction L2. For example, when the second direction L2 is the left-right direction, the first direction L1 can be the front-back direction; or when the second direction L2 is the front-back direction, the first direction L1 can be the left-right direction.

[0100] Through the above settings, at least two third oil return ports 11211 of the third oil return pump 1121 can be located at the diagonal positions of the main cylinder block 2, and at least two fourth oil return ports 11221 of the fourth oil return pump 1122 can also be located at the diagonal positions of the main cylinder block 2. In various extreme postures (uphill / downhill, left / right tilt), the oil return stability of the third oil return pump 1121 and the fourth oil return pump 1122 can be ensured, which helps to avoid problems such as cylinder flooding, dry grinding, abnormal noise, and insufficient oil pressure caused by poor oil return, and improves the reliability of the oil return pump assembly 1.

[0101] In some embodiments of the present invention, the second direction L2 can be the front-back direction so that the oil return pump assembly 1 can return oil to the main cylinder block 2 from the front and rear ends; or the second direction L2 can be set to the left-right direction so that the oil return pump assembly 1 can return oil to the main cylinder block 2 from the left and right ends. Thus, it is beneficial to meet different working conditions.

[0102] In some embodiments of the present invention, the main cylinder block 2 includes a left cylinder block 21 and a right cylinder block 22. The left cylinder block 21 and the right cylinder block 22 are arranged along the left-right direction, and the left cylinder block 21 and the right cylinder block 22 define a crankshaft cavity 23 for installing the crankshaft; the second direction L2 is the left-right direction, the third end 2a is provided on the left cylinder block 21, and the fourth end 2b is provided on the right cylinder block 22.

[0103] For example, referring to Figure 1 As shown, the main cylinder block 2 includes a left cylinder block 21 and a right cylinder block 22. The left cylinder block 21 and the right cylinder block 22 are arranged along the left-right direction, and a crankshaft cavity 23 is defined between the left cylinder block 21 and the right cylinder block 22. Among them, the fixing methods of the left cylinder block 21 and the right cylinder block 22 include but are not limited to welding, or bolt connection, or clamping, etc.

[0104] The crankshaft is rotatably mounted within the crankshaft cavity 23, and both the left cylinder block 21 and the right cylinder block 22 are provided with combustion chambers. There can be multiple combustion chambers. For example, the left cylinder block 21 is provided with two combustion chambers, and the right cylinder block 22 is provided with two combustion chambers. The four combustion chambers are spaced apart along the axial direction of the crankshaft, and each combustion chamber extends in the horizontal direction. Among them, a piston is respectively arranged in each combustion chamber, and the piston is connected to the crankshaft through a connecting rod. In this way, the piston can move along the extending direction of the combustion chamber to drive the crankshaft to rotate.

[0105] Since the combustion chamber extends in the horizontal direction, the piston moves in the horizontal direction. In this way, the space occupied by the combustion chamber and the piston in the up and down direction can be reduced, so that the overall height of the engine 100 is lower and the length is shorter, and further the center of gravity of the engine 100 is lower, so as to improve the driving stability during vehicle driving.

[0106] Among them, the second direction L2 is the left and right direction. The third end 2a can be arranged on the left cylinder block 21, and the fourth end 2b can be arranged on the right cylinder block 22, so that the oil return pump assembly 1 can return oil to the left cylinder block 21 and the right cylinder block 22 respectively.

[0107] It can be understood that since the main cylinder block 2 has a relatively large size in the left and right direction, by arranging the third end 2a and the fourth end 2b on the left and right sides of the main cylinder block 2 respectively, the oil return efficiency of the oil return pump assembly 1 to the main cylinder block 2 can be ensured, and the oil return dead angle of the main cylinder block 2 can be eliminated, improving the oil return effect of the oil return pump assembly 1.

[0108] In some embodiments of the present invention, the left cylinder block 21 includes a left cylinder body 211 and a left cylinder head 212. The left cylinder head 212 is covered on the side of the left cylinder body 211 facing away from the right cylinder block 22, and the third end 2a is arranged on the left cylinder head 212.

[0109] For example, with reference to Figure 1 As shown, the left cylinder block 21 includes a left cylinder body 211 and a left cylinder head 212. The left cylinder head 212 is arranged on the side of the left cylinder body 211 facing away from the right cylinder block 22 (i.e., the left side of the left cylinder body 211), and the left cylinder head 212 is used to block the combustion chamber of the left cylinder block 21 on the side of the left cylinder block 21 facing away from the right cylinder block 22. The left cylinder head 212 is provided with a first chamber and a second chamber communicating with the corresponding combustion chamber. The first chamber is used to place the fuel injector, and the second chamber is used to place the spark plug. The fuel injector is used to spray the oil liquid into the combustion chamber, and the spark plug is used to ignite the combustible mixture in the combustion chamber, so that the combustible mixture burns to drive the piston to move, and further realizes the rotation of the crankshaft. Among them, the third end 2a can be arranged on the left cylinder head 212, so that the oil return pump assembly 1 can return oil from the left cylinder head 212.

[0110] Through the above settings, the connection difficulty between the main cylinder block 2 and the oil return pump assembly 1 can be reduced, and the oil return effect of the oil return pump assembly 1 on the main cylinder block 2 can be improved.

[0111] In some embodiments of the present invention, the right cylinder block 22 includes a right cylinder body 221 and a right cylinder head 222. The right cylinder head 222 is disposed on the side of the right cylinder body 221 facing away from the left cylinder block 21, and the fourth end 2b is disposed on the right cylinder head 222.

[0112] For example, with reference to Figure 1 As shown, the right cylinder block 22 includes a right cylinder body 221 and a right cylinder head 222. The right cylinder head 222 is disposed on the side of the right cylinder body 221 facing away from the left cylinder block 21 (i.e., the right side of the right cylinder body 221), and the right cylinder head 222 is used to block the combustion chamber of the right cylinder block 22 on the side of the right cylinder block 22 facing away from the left cylinder block 21. A first chamber and a second chamber communicating with the corresponding combustion chamber are provided in the right cylinder head 222. The first chamber is used to place an injector, and the second chamber is used to place a spark plug. The injector is used to spray oil into the combustion chamber, and the spark plug is used to ignite the combustible mixture in the combustion chamber so that the combustible mixture burns to drive the piston to move, thereby realizing the rotation of the crankshaft. Among them, the fourth end 2b can be disposed on the right cylinder head 222 so that the oil return pump assembly 1 can return oil from the right cylinder head 222.

[0113] Through the above settings, the connection difficulty between the main cylinder block 2 and the oil return pump assembly 1 can be reduced, and the oil return effect of the oil return pump assembly 1 on the main cylinder block 2 can be improved.

[0114] In some embodiments of the present invention, the component to be returned with oil includes the main cylinder block 2 and the oil pan 3. The oil pan 3 is disposed at the bottom of the main cylinder block 2, and oil return areas are provided on both the oil pan 3 and the main cylinder block 2; the number of oil return areas on the oil pan 3 is multiple, and the multiple oil return areas on the oil pan 3 are at opposite ends of the oil pan 3, and the oil return ports 113 are respectively connected to the oil return areas at opposite ends of the oil pan 3; or, the number of oil return areas on the main cylinder block 2 is multiple, and the multiple oil return areas on the main cylinder block 2 are at opposite ends of the main cylinder block 2, and the oil return ports 113 are respectively connected to the oil return areas at opposite ends of the main cylinder block 2; or, oil return areas are provided on both the main cylinder block 2 and the oil pan 3, the oil return area on the main cylinder block 2 and the oil return area on the oil pan 3 are at opposite ends, and the oil return ports 113 are respectively connected to the oil return areas on the main cylinder block 2 and the oil return areas on the oil pan 3 at opposite ends.

[0115] For example, with reference to Figure 1As shown in the figure, the component to be oil-returned includes a main cylinder block 2 and an oil pan 3. The oil pan 3 is arranged at the lower part of the main cylinder block 2 and is communicated with the main cylinder block 2, so as to enclose the main cylinder block 2 at the lower part of the main cylinder block 2, prevent impurities from entering the lower part of the main cylinder block 2, and the oil pan 3 can be used to temporarily collect and store the lubricating oil flowing back from the parts that need to be lubricated everywhere in the main cylinder block 2 (such as the surface of the crankshaft, intake VVT, exhaust VVT, etc.). Both the oil pan 3 and the main cylinder block 2 are provided with oil-return areas, so that the oil-return pump assembly 1 can return oil to the oil pan 3 and the main cylinder block 2 respectively.

[0116] Among them, as Figure 4 shown, the number of oil-return areas of the oil pan 3 can be set to multiple. The multiple oil-return areas on the oil pan 3 are at opposite ends of the oil pan 3, and the oil-return ports 113 are respectively connected to the multiple oil-return areas on the oil pan 3, so that the oil-return pump assembly 1 can return oil from opposite ends of the oil pan 3.

[0117] Or, as Figure 8 shown, the number of oil-return areas of the main cylinder block 2 can be set to multiple. The multiple oil-return areas on the main cylinder block 2 are at opposite ends of the main cylinder block 2, and the oil-return ports 113 are respectively connected to the multiple oil-return areas on the main cylinder block 2, so that the oil-return pump assembly 1 can return oil from opposite ends of the main cylinder block 2.

[0118] Or again, as Figure 4 and Figure 8 shown, multiple oil-return areas can be respectively provided on the oil pan 3 and the main cylinder block 2. The multiple oil-return areas on the oil pan 3 are at opposite ends of the oil pan 3, and the multiple oil-return areas on the main cylinder block 2 are also at opposite ends of the main cylinder block 2. The oil-return ports 113 can be connected to the multiple oil-return areas on the oil pan 3, so that the oil-return pump assembly 1 can return oil from opposite ends of the oil pan 3, and the oil-return ports 113 can also be connected to the multiple oil-return areas on the main cylinder block 2, so that the oil-return pump assembly 1 can return oil from opposite ends of the main cylinder block 2.

[0119] It should be noted that the multiple oil-return areas of the oil pan 3 can be arranged oppositely along the first direction L1, and the multiple oil-return areas on the oil-return pump assembly 1 can be arranged oppositely along the second direction L2, and the first direction L1 intersects with the second direction L2; or, the multiple oil-return areas of the oil pan 3 and the multiple oil-return areas on the oil-return pump assembly 1 can both be arranged oppositely along the first direction L1. Through the above settings, different working conditions can be satisfied, and the practicability of the engine 100 is improved.

[0120] In some embodiments of the present invention, the component to be oil-returned includes a main cylinder block 2 and an oil pan 3. The oil pan 3 is disposed at the bottom of the main cylinder block 2. Both the oil pan 3 and the main cylinder block 2 are provided with oil-return regions. The number of oil-return regions of the oil pan 3 is multiple, and the multiple oil-return regions on the oil pan 3 are located at opposite ends of the oil pan 3. The number of oil-return regions of the main cylinder block 2 is multiple, and the multiple oil-return regions on the main cylinder block 2 are located at opposite ends of the main cylinder block 2. The oil-return pump assembly 1 includes a first oil-return pump 1111, a second oil-return pump 1112, and a cylinder block oil-return pump 112. The first oil-return pump 1111 is communicated with the oil-return region at one opposite end of the oil pan 3, and the second oil-return pump 1112 is connected to the oil-return region at the other opposite end of the oil pan 3. The cylinder block oil-return pump 112 is respectively connected to the oil-return regions at opposite ends of the main cylinder block 2.

[0121] For example, with reference to Figures 1 - 4 and Figures 6 - 8 as shown, the component to be oil-returned includes a main cylinder block 2 and an oil pan 3. The oil pan 3 is disposed at the lower part of the main cylinder block 2 and is communicated with the main cylinder block 2, so as to seal the lower part of the main cylinder block 2 to prevent impurities from entering the lower part of the main cylinder block 2, and the oil pan 3 can be used to temporarily collect and store the lubricating oil flowing back from various lubricated parts (such as the surface of the crankshaft, intake VVT, exhaust VVT, etc.) in the main cylinder block 2. Both the oil pan 3 and the main cylinder block 2 are provided with oil-return regions, so that the oil-return pump assembly 1 can return oil to the oil pan 3 and the main cylinder block 2 respectively through the oil-return regions.

[0122] The number of oil-return regions of the oil pan 3 can be set to be multiple. The multiple oil-return regions on the oil pan 3 are located at opposite ends of the oil pan 3. The oil-return ports 113 are respectively connected to the multiple oil-return regions on the oil pan 3, so that the oil-return pump assembly 1 can return oil from opposite ends of the oil pan 3.

[0123] The number of oil-return regions of the main cylinder block 2 can be set to be multiple. The multiple oil-return regions on the main cylinder block 2 are located at opposite ends of the main cylinder block 2. The oil-return ports 113 are respectively connected to the multiple oil-return regions on the main cylinder block 2, so that the oil-return pump assembly 1 can return oil from opposite ends of the main cylinder block 2.

[0124] Among them, the oil-return pump assembly 1 includes an oil pan oil-return pump 111 and a cylinder block oil-return pump 112. The oil pan oil-return pump 111 includes a first oil-return pump 1111 and a second oil-return pump 1112. The first oil-return pump 1111 is communicated with the oil-return region at one opposite end of the oil pan 3, and the second oil-return pump 1112 is connected to the oil-return region at the other opposite end of the oil pan 3, so that the oil-return pump assembly 1 can return oil to opposite ends of the oil pan 3 respectively through the first oil-return pump 1111 and the second oil-return pump 1112.

[0125] Meanwhile, the cylinder block oil return pump 112 can be respectively connected to the oil return areas at the opposite ends of the main cylinder block 2, so that the cylinder block oil return pump 112 can return oil to the opposite ends of the oil pan 3.

[0126] It can be understood that by providing the oil pan oil return pump 111 for returning oil to the opposite ends of the oil pan 3 and providing the cylinder block oil return pump 112 for returning oil to the opposite ends of the main cylinder block 2, the oil return effect of the oil return pump assembly 1 on the oil pan 3 and the main cylinder block 2 can be ensured, and the design rationality of the engine 100 is improved.

[0127] In some embodiments of the present invention, the opposite ends of the oil pan 3 are divided into a first end 3a and a second end 3b, and the first end 3a and the second end 3b are oppositely arranged in the front-rear direction; the first oil return pump 1111 and the second oil return pump 1112 are arranged in the front-rear direction, and the cylinder block oil return pump 112 is located between the first oil return pump 1111 and the second oil return pump 1112.

[0128] For example, as shown in Figures 2 - 4 the opposite ends of the oil pan 3 can be respectively set as the first end 3a and the second end 3b, and the first end 3a and the second end 3b are oppositely arranged in the front-rear direction. Among them, the first oil return pump 1111 and the second oil return pump 1112 can be arranged in the front-rear direction. The first oil return pump 1111 is used to be connected to the oil return area of the first end 3a, and the second oil return pump 1112 is used to be connected to the oil return area of the second end 3b, so that the oil return pump assembly 1 can return oil from the front and rear ends of the oil pan 3. Meanwhile, the cylinder block oil return pump 112 can be arranged between the first oil return pump 1111 and the second oil return pump 1112, and the cylinder block oil return pump 112 is used to be connected to the main cylinder block 2, so that the cylinder block oil return pump 112 can return oil to the main cylinder block 2.

[0129] Through the above settings, the structure of the oil return pump assembly 1 can be relatively symmetrical, which is beneficial to improving the balance performance of the engine 100 and shortening the distance between the oil return port 113 and the oil return area, ensuring the oil return effect of the oil return pump assembly 1. In addition, since the size of the oil pan 3 in the front-rear direction is large, by respectively setting the two ends of the oil pan 3 in the front-rear direction as the first end 3a and the second end 3b, the oil return effect of the oil return pump assembly 1 on the oil pan 3 can be better ensured.

[0130] In some embodiments of the present invention, as shown in Figure 2 the oil return pump assembly 1 is installed in the oil pan 3. The first oil return port 11111 of the first oil return pump 1111 can be opened on the bottom wall 1a of the oil return pump assembly 1, and the second oil return port 11121 of the second oil return pump 1112 can also be opened on the bottom wall 1a of the oil return pump assembly 1. Thus, the oil return pump assembly 1 directly sucks oil from the oil pan 3, which can simplify the pipeline layout, shorten the path of the oil fluid, reduce the pressure loss, and improve the pressure response.

[0131] Further, the distance between the bottom wall 1a of the oil return pump assembly 1 and the bottom surface of the oil pan 3 can be set to 5 mm - 10 mm, such as 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, etc. Thus, the first oil return pump 1111 and the second oil return pump 1112 can better extract the lubricating oil in the oil pan 3, improving the reliability of the engine 100.

[0132] In some embodiments of the present invention, the main cylinder block 2 includes a left cylinder block 21 and a right cylinder block 22. The left cylinder block 21 and the right cylinder block 22 are arranged along the left - right direction. The left cylinder block 21 and the right cylinder block 22 define a crankshaft cavity 23 for installing a crankshaft; a oil return area is provided on the left cylinder block 21. The oil return area of the left cylinder block 21 includes a first sub - area and a second sub - area oppositely arranged along the front - rear direction. A oil return area is provided on the right cylinder block 22. The oil return area of the right cylinder block 22 includes a third sub - area and a fourth sub - area oppositely arranged along the front - rear direction; the cylinder block oil return pump 112 includes a third oil return pump 1121 and a fourth oil return pump 1122. The third oil return pump 1121 and the fourth oil return pump 1122 are sequentially arranged between the first oil return pump 1111 and the second oil return pump 1112 along the front - rear direction. The third oil return pump 1121 includes two third oil return ports 11211. The first sub - area is connected to one of the third oil return ports 11211, and the fourth sub - area is connected to the other third oil return port 11211; the fourth oil return pump 1122 includes two fourth oil return ports 11221. The second sub - area is connected to one of the fourth oil return ports 11221, and the third sub - area is connected to the other fourth oil return port 11221.

[0133] For example, as shown in Figure 1 the main cylinder block 2 includes a left cylinder block 21 and a right cylinder block 22. The left cylinder block 21 and the right cylinder block 22 are arranged along the left - right direction, and a crankshaft cavity 23 is defined between the left cylinder block 21 and the right cylinder block 22. Among them, the fixing methods of the left cylinder block 21 and the right cylinder block 22 include but are not limited to welding, or bolt connection, or clamping, etc.

[0134] A crankshaft is rotatably installed in the crankshaft cavity 23. Combustion chambers are provided on both the left cylinder block 21 and the right cylinder block 22. There can be multiple combustion chambers. For example, the left cylinder block 21 is provided with two combustion chambers, and the right cylinder block 22 is provided with two combustion chambers. The four combustion chambers are spaced apart along the axial direction of the crankshaft, and each combustion chamber extends along the horizontal direction. Among them, a piston is respectively arranged in each combustion chamber, and the piston is connected to the crankshaft through a connecting rod. In this way, the piston can move along the extending direction of the combustion chamber to drive the crankshaft to rotate.

[0135] Since the combustion chamber extends horizontally, the piston moves horizontally. In this way, the space occupied by the combustion chamber and the piston in the vertical direction can be reduced, so that the overall height of the engine 100 is lower and the length is shorter, and further the center of gravity of the engine 100 is lower, thereby improving the driving stability during vehicle driving.

[0136] Wherein, an oil return area can be provided on the left cylinder block 21. The oil return area of the left cylinder block 21 includes a first sub-area and a second sub-area, and the first sub-area and the second sub-area are arranged oppositely in the front-rear direction. The right cylinder block 22 is also provided with an oil return area. The oil return area of the right cylinder block 22 includes a third sub-area and a fourth sub-area, and the third sub-area and the fourth sub-area are arranged oppositely in the front-rear direction. The first sub-area and the fourth sub-area are located at the diagonal positions of the main cylinder block 2, and the second sub-area and the third sub-area are located at the diagonal positions of the main cylinder block 2.

[0137] At the same time, the cylinder block oil return pump 112 can be provided to include a third oil return pump 1121 and a fourth oil return pump 1122. The third oil return pump 1121 and the fourth oil return pump 1122 are sequentially arranged between the first oil return pump 1111 and the second oil return pump 1112 in the front-rear direction. The third oil return pump 1121 includes two third oil return ports 11211. The first sub-area is connected to one of the third oil return ports 11211, so that the third oil return pump 1121 can return oil from the first sub-area, and the fourth sub-area is connected to the other third oil return port 11211, so that the third oil return pump 1121 can return oil from the fourth sub-area.

[0138] The fourth oil return pump 1122 includes two fourth oil return ports 11221. The second sub-area is connected to one of the fourth oil return ports 11221, so that the fourth oil return pump 1122 can return oil from the second sub-area, and the third sub-area is connected to the other fourth oil return port 11221, so that the fourth oil return pump 1122 can return oil from the third sub-area.

[0139] Through the above settings, the two third oil return ports 11211 of the third oil return pump 1121 can be located at the diagonal positions of the main cylinder block 2, and the two fourth oil return ports 11221 of the fourth oil return pump 1122 can also be located at the diagonal positions of the main cylinder block 2. In each extreme attitude (uphill / downhill, left / right tilt), the oil return stability of the third oil return pump 1121 and the fourth oil return pump 1122 can be ensured, which is beneficial to avoiding problems such as cylinder flooding, dry grinding, abnormal noise, and insufficient oil pressure caused by poor oil return, and improves the reliability of the oil return pump assembly 1.

[0140] In some embodiments of the present invention, the left cylinder block 21 includes a left cylinder body 211 and a left cylinder head 212. The left cylinder head 212 is disposed on the side of the left cylinder body 211 facing away from the right cylinder block 22, and an oil return area is provided on the left cylinder head 212; the right cylinder block 22 includes a right cylinder body 221 and a right cylinder head 222. The right cylinder head 222 is disposed on the side of the right cylinder body 221 facing away from the left cylinder block 21, and an oil return area is provided on the right cylinder head 222; in the projection plane in the up-down direction, the projection areas of the left cylinder body 211 and the right cylinder body 221 cover the projection area of the oil pan 3.

[0141] For example, as shown in Figure 1 , the left cylinder block 21 includes a left cylinder body 211 and a left cylinder head 212. The left cylinder head 212 is disposed on the side of the left cylinder body 211 facing away from the right cylinder block 22 (i.e., the left side of the left cylinder body 211), and the left cylinder head 212 is used to seal the combustion chamber of the left cylinder block 21 on the side of the left cylinder block 21 facing away from the right cylinder block 22. A first chamber and a second chamber communicating with the corresponding combustion chamber are provided in the left cylinder head 212. The first chamber is used to place an injector, and the second chamber is used to place a spark plug. The injector is used to spray oil into the combustion chamber, and the spark plug is used to ignite the combustible mixture in the combustion chamber, so that the combustible mixture burns to drive the piston to move, and further realize the rotation of the crankshaft. Among them, the third end 2a can be disposed on the left cylinder head 212 so that the oil return pump assembly 1 can return oil from the left cylinder head 212.

[0142] The right cylinder block 22 includes a right cylinder body 221 and a right cylinder head 222. The right cylinder head 222 is disposed on the side of the right cylinder body 221 facing away from the left cylinder block 21 (i.e., the right side of the right cylinder body 221), and the right cylinder head 222 is used to seal the combustion chamber of the right cylinder block 22 on the side of the right cylinder block 22 facing away from the left cylinder block 21. A first chamber and a second chamber communicating with the corresponding combustion chamber are provided in the right cylinder head 222. The first chamber is used to place an injector, and the second chamber is used to place a spark plug. The injector is used to spray oil into the combustion chamber, and the spark plug is used to ignite the combustible mixture in the combustion chamber, so that the combustible mixture burns to drive the piston to move, and further realize the rotation of the crankshaft. Among them, the fourth end 2b can be disposed on the right cylinder head 222 so that the oil return pump assembly 1 can return oil from the right cylinder head 222.

[0143] At the same time, in the projection plane in the up-down direction, the projection areas of the left cylinder body 211 and the right cylinder body 221 can be set to cover the projection area of the oil pan 3, that is, the overall size of the oil pan 3 is smaller than the overall size of the main cylinder block 2.

[0144] It can be understood that by arranging the main cylinder block 2 to be connected to the oil return pump assembly 1 through the cylinder head, the connection difficulty between the main cylinder block 2 and the oil return pump assembly 1 can be reduced, and the oil return effect of the oil return pump assembly 1 on the main cylinder block 2 can be improved. In addition, by arranging the overall size of the oil pan 3 to be smaller than the overall size of the main cylinder block 2, the oil return difficulty of the oil pan 3 can be reduced, ensuring that the oil return pump assembly 1 can fully return oil to the oil pan 3.

[0145] In some embodiments of the present invention, the oil return pump assembly 1 includes at least one oil return pump 11, and the oil return pump 11 includes: a housing 12, a first rotating member, and a second rotating member. The housing 12 is provided with an accommodation cavity 121, and the housing 12 is provided with a first oil inlet passage 122, a second oil inlet passage 123, and an oil outlet passage 124 that communicate with the accommodation cavity 121. The first oil inlet passage 122 and the second oil inlet passage 123 are respectively located on opposite sides of the housing 12 and both are formed with oil return ports 113; the first rotating member is arranged in the accommodation cavity 121 to guide the oil from the first oil inlet passage 122 to the oil outlet passage 124 when rotating, and the second rotating member is arranged in the accommodation cavity 121 to guide the oil from the second oil inlet passage 123 to the oil outlet passage 124 when rotating.

[0146] First, as Figures 10 - 12 shown, the oil return pump assembly 1 includes at least one oil return pump 11, and the oil return pump 11 includes a housing 12, and an accommodation cavity 121 is formed inside the housing 12. The housing 12 is further provided with a first oil inlet passage 122, a second oil inlet passage 123, and an oil outlet passage 124. The first oil inlet passage 122, the second oil inlet passage 123, and the oil outlet passage 124 respectively communicate with the accommodation cavity 121. The oil outlet passage 124 is located between the first oil inlet passage 122 and the second oil inlet passage 123. Both the first oil inlet passage 122 and the second oil inlet passage 123 are formed with oil return ports 113, and the oil return ports 113 are used to communicate with the components to be oil-returned of the engine 100 (such as the main cylinder block 2, the oil pan 3), and the oil outlet passage 124 is used to communicate with the oil pot.

[0147] At the same time, the first oil inlet passage 122 and the second oil inlet passage 123 can be arranged on opposite sides of the housing 12 so that the first oil inlet passage 122 and the second oil inlet passage 123 can better communicate with the components to be oil-returned. For example, the first oil inlet passage 122 and the second oil inlet passage 123 can be respectively arranged on the left and right sides of the housing 12, and the first oil inlet passage 122 and the second oil inlet passage 123 can respectively communicate with the left and right ends of the components to be oil-returned; or, the first oil inlet passage 122 and the second oil inlet passage 123 can be respectively arranged on the front and back sides of the housing 12, and the first oil inlet passage 122 and the second oil inlet passage 123 can respectively communicate with the front and back ends of the components to be oil-returned.

[0148] Among them, the oil return pump 11 further includes a first rotating member and a second rotating member. The first rotating member is installed in the accommodating cavity 121 and is rotatable relative to the housing 12. The first rotating member is located between the oil outlet passage 124 and the first oil inlet passage 122. When the first rotating member rotates in the third direction, the oil outlet passage 124 is located downstream of the first oil inlet passage 122, and the first rotating member can guide the oil from the first oil inlet passage 122 to the oil outlet passage 124; the second rotating member is installed in the accommodating cavity 121 and is rotatable relative to the housing 12. The second rotating member is located between the oil outlet passage 124 and the second oil inlet passage 123. When the second rotating member rotates in the fourth direction, the oil outlet passage 124 is located downstream of the second oil inlet passage 123, and the second rotating member can guide the oil from the second oil inlet passage 123 to the oil outlet passage 124.

[0149] It should be noted that the first rotating member and the second rotating member can be any one of a gear, a ratchet, or a screw. In addition, one of the third direction and the fourth direction is the clockwise direction, and the other is the counterclockwise direction.

[0150] In the specific working process, the first rotating member can be driven to rotate in the third direction and the second rotating member can be driven to rotate in the fourth direction, so that the lubricating oil in the component to be oil-returned can flow into the accommodating cavity 121 through the first oil inlet passage 122 and the second oil inlet passage 123 respectively. The oil flowing in from the first oil inlet passage 122 can flow into the oil outlet passage 124 under the drive of the first rotating member, and the oil flowing in from the second oil inlet passage 123 can flow into the oil outlet passage 124 under the drive of the second rotating member. The oil flowing in from the first oil inlet passage 122 and the oil flowing in from the second oil inlet passage 123 can converge in the oil outlet passage 124 and flow to the oil pot through the oil outlet passage 124.

[0151] Through the above settings, the flow path can be simplified, the structural complexity of the oil return pump 11 can be reduced, and the oil can flow out more stably, improving the oil return efficiency of the oil return pump 11. In addition, by arranging the first oil inlet passage 122 and the second oil inlet passage 123 on opposite sides of the housing 12, the first oil inlet passage 122 and the second oil inlet passage 123 can respectively correspond to the opposite side walls of the component to be oil-returned, which is conducive to reducing the installation difficulty of the oil return pump assembly 1.

[0152] In some embodiments of the present invention, as Figure 10 shown, the inlet end 124a of the oil outlet passage 124 can be arranged below the first rotating member and the second rotating member, so that the height of the inlet end 124a of the oil outlet passage 124 is lower than that of the first oil inlet passage 122 and the second oil inlet passage 123, so that the oil flowing into the accommodating cavity 121 can flow downward into the oil outlet passage 124. Thus, the flow process of the oil can be made smoother, and the backflow of the oil can be prevented, improving the design rationality of the oil return pump 11.

[0153] In some embodiments of the present invention, the first rotating member and the second rotating member are respectively formed as gears and are meshed with each other, and the inlet end 124a of the oil outlet passage 124 is located directly below the meshing portion of the first rotating member and the second rotating member.

[0154] For example, with reference to Figure 10 As shown, the first rotating member and the second rotating member are respectively formed as gears and are meshed with each other. An oil transportation space 17 that rotates with the gears is formed between two adjacent tooth portions of the gears. The volume of the oil transportation space 17 decreases when the first rotating member and the second rotating member are meshed and increases when the first rotating member and the second rotating member are disengaged from meshing. The oil transportation space 17 can store oil and drive the oil to move synchronously, and the oil in the oil transportation space 17 can be pressured out when the first rotating member and the second rotating member are meshed.

[0155] Wherein, the inlet end 124a of the oil outlet passage 124 can be set to be directly below the meshing portion of the first rotating member and the second rotating member and opposite to the side where the first rotating member and the second rotating member are meshed, so that the oil flowing out of the oil transportation space 17 can directly flow to the inlet end 124a of the oil outlet passage 124 and flow out into the oil pot through the oil outlet passage 124.

[0156] Exemplarily, the first oil inlet passage 122 is communicated with the oil transportation space 17 on the first rotating member. The first rotating member can transport the oil flowing into the oil transportation space 17 from the first oil inlet passage 122 to the meshing portion of the first rotating member and the second rotating member; the second oil inlet passage 123 is communicated with the oil transportation space 17 on the second rotating member. The second rotating member can transport the oil flowing into the oil transportation space 17 from the second oil inlet passage 123 to the meshing portion of the first rotating member and the second rotating member.

[0157] Through the above settings, the oil flowing into the accommodation cavity 121 can stably flow to the oil outlet passage 124, improving the reliability of the oil return pump 11.

[0158] In some embodiments of the present invention, as Figure 10 shown, the first oil inlet passage 122 can be arranged on the side of the first rotating member facing away from the second rotating member, and the second oil inlet passage 123 can be arranged on the side of the second rotating member facing away from the first rotating member. Through the above settings, the mutual influence between the first oil inlet passage 122 and the second oil inlet passage 123 can be reduced, improving the reliability of the oil return pump 11.

[0159] In some embodiments of the present invention, as Figure 10 shown, the first rotating member and the second rotating member can be set to abut against the inner wall of the accommodation cavity 121, so that the inner wall of the accommodation cavity 121 can enclose the oil transportation space 17 to a certain extent. Thereby, it is beneficial to improve the sealing property of the oil transportation space 17 and the oil transportation efficiency of the oil transportation space 17.

[0160] In some embodiments of the present invention, as Figures 10 - 12 shown, one of the first rotating member and the second rotating member may be set as the driving gear 13 and the other as the driven gear 14. For example, the first rotating member may be set as the driving gear 13 and the second rotating member may be set as the driven gear 14. Thus, the first rotating member and the second rotating member can be driven to rotate synchronously by a single driving member, which is beneficial to simplifying the structure of the oil return pump 11, reducing costs, and improving the operating stability of the oil return pump 11.

[0161] In some embodiments of the present invention, the oil return pump 11 of the embodiments of the present invention further includes: a first rotating shaft 15 and a second rotating shaft 16. The first rotating shaft 15 is a driving shaft. The driving gear 13 is sleeved on the first rotating shaft 15 and is in interference fit with the first rotating shaft 15, and / or, the driven gear 14 is sleeved on the second rotating shaft 16 and is key-connected to the second rotating shaft 16.

[0162] For example, referring to Figures 10 - 11 shown, the oil return pump 11 further includes a first rotating shaft 15 and a second rotating shaft 16. The first rotating shaft 15 and the second rotating shaft 16 are arranged in parallel at intervals. Among them, the first rotating shaft 15 may be set as the driving shaft. The driving gear 13 is sleeved on the outer side of the first rotating shaft 15. The inner diameter of the driving gear 13 is slightly smaller than the outer diameter of the first rotating shaft 15, so that the driving gear 13 can be in interference fit with the first rotating shaft 15. At the same time, the driven gear 14 may be sleeved on the second rotating shaft 16. Key grooves are respectively provided on the inner side of the driven gear 14 and the outer side of the second rotating shaft 16. A flat key is arranged in the key groove, so that the driven gear 14 and the second rotating shaft 16 are key-connected. Of course, the driven gear 14 and the second rotating shaft 16 may also be connected by a spline.

[0163] Through the above settings, the continuous and stable transmission of the driving force can be ensured, and the assembly difficulty of the oil return pump 11 can be reduced, and the oil return efficiency of the oil return pump 11 is improved.

[0164] In some embodiments of the present invention, as Figures 10 - 12 shown, the housing 12 is provided with two central holes 126 arranged in parallel at intervals. The first rotating shaft 15 and the second rotating shaft 16 are respectively installed in the two central holes 126. The first rotating shaft 15, the second rotating shaft 16 and the central holes 126 are all in clearance fit, which can prevent excessive wear of the hole walls of the first rotating shaft 15, the second rotating shaft 16 and the central holes 126 while ensuring the positioning accuracy. Thus, the design rationality of the oil return pump 11 is improved.

[0165] In some embodiments of the present invention, as Figure 11 shown, the oil return pump assembly 1 may be provided with a plurality of oil return pumps 11, and the plurality of oil return pumps 11 may share the first rotating shaft 15 and the second rotating shaft 16. Thus, the structure of the oil return pump assembly 1 can be simplified.

[0166] In some embodiments of the present invention, the accommodation cavity 121 includes a first sub-cavity 1211 and a second sub-cavity 1212 that are connected. In the same cross-section, the cross-sectional shape of the first sub-cavity 1211 and the cross-sectional shape of the second sub-cavity 1212 are both circular. The inlet end 124a of the oil outlet passage 124 is located at the connection between the first sub-cavity 1211 and the second sub-cavity 1212, and the cross-section is perpendicular to the rotation axis of the first rotating member.

[0167] For example, with reference to Figures 10 - 12 As shown, the accommodation cavity 121 includes a first sub-cavity 1211 and a second sub-cavity 1212, and the first sub-cavity 1211 and the second sub-cavity 1212 are connected to each other. The first rotating member is installed in the first sub-cavity 1211, and the second rotating member is installed in the second sub-cavity 1212. In a cross-section perpendicular to the rotation axis of the first rotating member, the cross-sectional shape of the first sub-cavity 1211 and the cross-sectional shape of the second sub-cavity 1212 can be set to be circular. The first rotating member is correspondingly installed at the center of the circle of the first sub-cavity 1211, and the second rotating member is correspondingly installed at the center of the circle of the first sub-cavity 1211, so that the accommodation cavity 121 can be more matched with the first rotating member and the second rotating member, which is beneficial to improving the flow stability of the oil.

[0168] Among them, the inlet end 124a of the oil outlet passage 124 can be arranged at the connection between the first sub-cavity 1211 and the second sub-cavity 1212, so that the distance between the oil outlet passage 124 and the first sub-cavity 1211 is equal to the distance between the oil outlet passage 124 and the second sub-cavity 1212. Thus, the overall oil return effect of the oil return pump 11 can be ensured, and the design rationality of the oil return pump 11 is improved.

[0169] It should be noted that when both the first rotating member and the second rotating member are formed as gears, there is an overlapping area at the connection between the first sub-cavity 1211 and the second sub-cavity 1212, and the first rotating member and the second rotating member can mesh in the overlapping area.

[0170] In some embodiments of the present invention, as Figure 10 shown, the first sub-cavity 1211 and the second sub-cavity 1212 can be arranged in sequence in the left-right direction. Thus, the space of the engine 100 in the left-right direction can be fully utilized, which is beneficial to reducing the height dimension of the engine 100 and meeting the layout requirements of the overall machine space.

[0171] In some embodiments of the present invention, one of the connections between the first sub-cavity 1211 and the second sub-cavity 1212 is formed as a guiding protrusion 125 that extends toward the inlet end 124a of the oil outlet passage 124.

[0172] For example, with reference to Figure 12As shown, guiding protrusions 125 may be formed at the connection of the first sub-chamber 1211 and the second sub-chamber 1212 near the oil outlet passage 124. There are two guiding protrusions 125, and the two guiding protrusions 125 are respectively located on both sides of the inlet end 124a of the oil outlet passage 124 and extend towards the inlet end 124a of the extended oil outlet passage 124. The guiding protrusions 125 are used to guide the oil flowing out of the oil transportation space 17 to the oil outlet passage 124. Thus, the flow stability of the oil can be improved, which is conducive to improving the oil return efficiency.

[0173] In some embodiments of the present invention, as Figure 10 shown, the first oil inlet passage 122 and the second oil inlet passage 123 are arranged at an equal distance from the oil outlet passage 124, so that the distance between the oil outlet passage 124 and the first oil inlet passage 122 is equal to the distance between the oil outlet passage 124 and the second oil inlet passage 123. Thus, the oil return effect of the first oil inlet passage 122 and the second oil inlet passage 123 can be ensured, and the design rationality of the oil return pump 11 is improved.

[0174] In some embodiments of the present invention, filters may be installed in the first oil inlet passage 122 and the second oil inlet passage 123. The filters can be fixed by interference fit or riveting. The filters filter the oil flowing into the oil return pump 11. Thus, problems such as jamming and wear caused by impurities entering the oil return pump 11 can be avoided.

[0175] The present invention also proposes a hybrid assembly 1000.

[0176] As Figure 13 shown, the hybrid assembly 1000 according to an embodiment of the present invention includes: a generator 200, a battery, and the engine 100 according to any of the above embodiments. The engine 100 and the generator 200 are power-connected, the generator 200 is electrically connected to the battery, and the engine 100 is used to drive the generator 200 to generate electricity to charge the battery.

[0177] The hybrid assembly 1000 according to an embodiment of the present invention has high operating stability and good overall performance, which is conducive to improving the overall performance of the vehicle.

[0178] The present invention further proposes a vehicle.

[0179] The vehicle according to an embodiment of the present invention includes: the engine 100 according to any of the above embodiments; or, the hybrid assembly 1000 according to any of the above embodiments.

[0180] The vehicle according to an embodiment of the present invention has good overall operating stability, which is conducive to improving the brand image.

[0181] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0182] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0183] In the description of the present invention, the meaning of "a plurality of" is two or more.

[0184] In the description of the present invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween.

[0185] In the description of the present invention, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature.

[0186] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0187] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An engine (100), characterized in that: include: An oil return component to be returned, wherein the oil return component to be returned is provided with a plurality of oil return areas, at least part of the oil return areas being located at two opposite ends of the oil return component to be returned; An oil return pump assembly (1), the oil return pump assembly (1) having an oil return port (113), the oil return port (113) being respectively connected to the oil return areas at two opposite ends.

2. The engine (100) according to claim 1, characterized in that: The oil return component comprises an oil pan (3), the oil pan (3) having a first end (3a) and a second end (3b) along a first direction (L1) both provided with the oil return area, and the oil return port (113) being respectively connected to the oil return area of ​​the first end (3a) and the oil return area of ​​the second end (3b).

3. The engine (100) according to claim 2, characterized in that: The oil return pump assembly (1) comprises a first oil return pump (1111) and a second oil return pump (1112); the first oil return pump (1111) has a first oil return port (11111); the second oil return pump (1112) has a second oil return port (11121); the first oil return port (11111) is connected to the oil return area of ​​the first end (3a); and the second oil return port (11121) is connected to the oil return area of ​​the second end (3b).

4. The engine (100) according to claim 3, characterized in that: The first end (3a) is provided with at least two oil return areas, the first oil return pump (1111) is provided with at least two first oil return ports (11111), and the at least two first oil return ports (11111) are connected to the at least two oil return areas of the first end (3a) in a one-to-one correspondence; and / or, The second end (3b) is provided with at least two oil return areas, the second oil return pump (1112) is provided with at least two second oil return ports (11121), and at least two of the first oil return ports (11111) and at least two of the oil return areas of the second end (3b) are connected one-to-one.

5. The engine (100) according to any one of claims 2 to 4, characterized in that: The first direction (L1) is the front-rear direction.

6. The engine (100) according to claim 1, characterized in that The oil return component comprises a main cylinder body (2), and the third end (2a) and the fourth end (2b) of the main cylinder body (2) along the second direction (L2) are both provided with the oil return area, and the oil return port (113) is respectively connected to the oil return area of ​​the third end (2a) and the oil return area of ​​the fourth end (2b).

7. The engine (100) according to claim 6, characterized in that The oil return pump assembly (1) comprises a third oil return pump (1121) and a fourth oil return pump (1122); the third oil return pump (1121) has a third oil return port (11211); the fourth oil return pump (1122) has a fourth oil return port (11221); the third oil return port (11211) is connected to the oil return area of ​​the third end (2a); and the fourth oil return port (11221) is connected to the oil return area of ​​the fourth end (2b).

8. The engine (100) according to claim 7, characterized in that The third end (2a) is provided with at least two oil return areas, the third oil return pump (1121) is provided with at least two third oil return ports (11211), and the at least two third oil return ports (11211) are connected to the at least two oil return areas of the third end (2a) in a one-to-one correspondence; and / or, The fourth end (2b) is provided with at least two oil return areas, the fourth oil return pump (1122) is provided with at least two fourth oil return ports (11221), and the at least two fourth oil return ports (11221) are connected to the at least two oil return areas of the fourth end (2b) in a one-to-one correspondence.

9. The engine (100) according to claim 7, characterized in that: There are at least two third oil return ports (11211), one of which is connected to the oil return area of ​​the third end (2a), and the other of which is connected to the oil return area of ​​the fourth end (2b).

10. The engine (100) according to claim 9, characterized in that There are at least two fourth oil return ports (11221), one of which is connected to the oil return area of ​​the third end (2a), and the other of which is connected to the oil return area of ​​the fourth end (2b); The oil return area of ​​the third end (2a) comprises a first sub-area and a second sub-area which are arranged opposite to each other along a first direction (L1), the first sub-area being connected to one of the third oil return ports (11211), and the second sub-area being connected to one of the fourth oil return ports (11221); The oil return area of ​​the fourth end (2b) comprises a third sub-area and a fourth sub-area which are arranged relatively to each other along the first direction (L1), the third sub-area being connected to another of the fourth oil return ports (11221), and the fourth sub-area being connected to another of the third oil return ports (11211); wherein the first direction (L1) and the second direction (L2) are arranged perpendicularly.

11. The engine (100) according to any one of claims 6 to 10, characterized in that: The second direction (L2) is the left-right direction.

12. The engine (100) according to claim 6, characterized in that The main cylinder body (2) comprises a left cylinder body (21) and a right cylinder body (22), wherein the left cylinder body (21) and the right cylinder body (22) are arranged in a left-right direction, and the left cylinder body (21) and the right cylinder body (22) define a crankshaft chamber (23) for mounting a crankshaft; The second direction (L2) is a left-right direction, the third end (2a) is arranged on the left cylinder body (21), and the fourth end (2b) is arranged on the right cylinder body (22).

13. The engine (100) according to claim 12, characterized in that The left cylinder body (21) comprises a left cylinder body (211) and a left cylinder cover (212), wherein the left cylinder cover (212) is arranged on a side of the left cylinder body (211) away from the right cylinder body (22), and the third end (2a) is arranged on the left cylinder cover (212); and / or, The right cylinder body (22) comprises a right cylinder main body (221) and a right cylinder cover (222); the right cylinder cover (222) is arranged on a side of the right cylinder main body (221) away from the left cylinder body (21); and the fourth end (2b) is arranged on the right cylinder cover (222).

14. The engine (100) according to claim 1, characterized in that The oil return component comprises a main cylinder body (2) and an oil pan (3), wherein the oil pan (3) is arranged at the bottom of the main cylinder body (2), and the oil return area is arranged on the oil pan (3) and the main cylinder body (2); The oil pan (3) has a plurality of oil return areas, the plurality of oil return areas on the oil pan (3) are located at two opposite ends of the oil pan (3), and the oil return port (113) is respectively connected to the oil return areas at the two opposite ends of the oil pan (3); or, The main cylinder (2) has a plurality of oil return areas, the plurality of oil return areas on the main cylinder (2) are located at two opposite ends of the main cylinder (2), and the oil return port (113) is respectively connected to the oil return areas at the two opposite ends of the main cylinder (2); or, The oil return area is provided on both the main cylinder body (2) and the oil pan (3); the oil return area of ​​the main cylinder body (2) and the oil return area on the oil pan (3) are located at opposite ends; and the oil return port (113) is respectively connected to the oil return area on the main cylinder body (2) and the oil return area on the oil pan (3) located at opposite ends.

15. The engine (100) according to claim 1, characterized in that The oil return component comprises a main cylinder body (2) and an oil pan (3), wherein the oil pan (3) is arranged at the bottom of the main cylinder body (2), and the oil return area is arranged on the oil pan (3) and the main cylinder body (2); The oil pan (3) has a plurality of oil return areas, and the plurality of oil return areas on the oil pan (3) are located at two opposite ends of the oil pan (3); The main cylinder (2) has a plurality of oil return areas, and the plurality of oil return areas on the main cylinder (2) are located at two opposite ends of the main cylinder (2); The oil return pump assembly (1) comprises a first oil return pump (1111), a second oil return pump (1112) and a cylinder oil return pump (112), wherein the first oil return pump (1111) is connected to the oil return area at one end opposite to the oil pan (3), and the second oil return pump (1112) is connected to the oil return area at the other end opposite to the oil pan (3); The cylinder oil return pump (112) is respectively connected to the oil return areas at two opposite ends of the main cylinder (2).

16. The engine (100) according to claim 15, characterized in that The oil pan (3) has two opposite ends divided into a first end (3a) and a second end (3b), wherein the first end (3a) and the second end (3b) are arranged opposite to each other in a front-rear direction; The first oil return pump (1111) and the second oil return pump (1112) are arranged in the front-to-rear direction, and the cylinder oil return pump (112) is located between the first oil return pump (1111) and the second oil return pump (1112).

17. The engine (100) according to claim 16, characterized in that The main cylinder body (2) comprises a left cylinder body (21) and a right cylinder body (22), wherein the left cylinder body (21) and the right cylinder body (22) are arranged in a left-right direction, and the left cylinder body (21) and the right cylinder body (22) define a crankshaft chamber (23) for mounting a crankshaft; The left cylinder body (21) is provided with an oil return area, the oil return area of ​​the left cylinder body (21) comprises a first sub-area and a second sub-area which are arranged opposite to each other in the front-rear direction, and the right cylinder body (22) is provided with an oil return area, the oil return area of ​​the right cylinder body (22) comprises a third sub-area and a fourth sub-area which are arranged opposite to each other in the front-rear direction; The cylinder oil return pump (112) comprises a third oil return pump (1121) and a fourth oil return pump (1122), wherein the third oil return pump (1121) and the fourth oil return pump (1122) are sequentially arranged between the first oil return pump (1111) and the second oil return pump (1112) in a front-to-rear direction, and the third oil return pump (1121) comprises two third oil return ports (11211), wherein the first sub-region is connected to one of the third oil return ports (11211), and the fourth sub-region is connected to the other of the third oil return ports (11211); The fourth oil return pump (1122) comprises two fourth oil return ports (11221), the second sub-region is connected to one of the fourth oil return ports (11221), and the third sub-region is connected to the other of the fourth oil return ports (11221).

18. The engine (100) according to claim 17, characterized in that The left cylinder body (21) comprises a left cylinder body (211) and a left cylinder cover (212); the left cylinder cover (212) is arranged on a side of the left cylinder body (211) away from the right cylinder body (22); and the oil return area is arranged on the left cylinder cover (212); The right cylinder body (22) comprises a right cylinder body (221) and a right cylinder cover (222), wherein the right cylinder cover (222) is arranged on a side of the right cylinder body (221) away from the left cylinder body (21), and the oil return area is arranged on the right cylinder cover (222); On the projection surface in the up-down direction, the projection areas of the left cylinder body (211) and the right cylinder body (221) cover the projection area of ​​the oil pan (3).

19. The engine (100) according to claim 1, characterized in that The oil return pump assembly (1) comprises at least one oil return pump (11), wherein the oil return pump (11) comprises: A housing (12), the housing (12) being provided with a containing chamber (121), the housing (12) being provided with a first oil inlet passage (122), a second oil inlet passage (123) and an oil outlet passage (124) which are communicated with the containing chamber (121), the first oil inlet passage (122) and the second oil inlet passage (123) being respectively located on two opposite sides of the housing (12) and both being formed with the oil return port (113); A first rotating member and a second rotating member, wherein the first rotating member is disposed in the accommodating cavity (121) and is used for guiding oil from the first oil inlet passage (122) to the oil outlet passage (124) when rotating, and the second rotating member is disposed in the accommodating cavity (121) and is used for guiding oil from the second oil inlet passage (123) to the oil outlet passage (124) when rotating.

20. The engine (100) according to claim 19, characterized in that The inlet end (124a) of the oil outlet passage (124) is located below the first rotating member and the second rotating member.

21. The engine (100) according to claim 20, characterized in that The first rotating member and the second rotating member are respectively formed as gears and mesh with each other, and the inlet end (124a) of the oil outlet channel (124) is located directly below the meshing position of the first rotating member and the second rotating member.

22. The engine (100) according to claim 21, characterized in that One of the first rotating member and the second rotating member is a driving gear (13) and the other is a driven gear (14).

23. The engine (100) according to claim 22, characterized in that Also includes: A first rotating shaft (15) and a second rotating shaft (16), wherein the first rotating shaft (15) is a driving shaft, the driving gear (13) is sleeved on the first rotating shaft (15) and is interference fit with the first rotating shaft (15), and / or the driven gear (14) is sleeved on the second rotating shaft (16) and is key-connected with the second rotating shaft (16).

24. The engine (100) according to claim 19, characterized in that The accommodating chamber (121) comprises a first sub-chamber (1211) and a second sub-chamber (1212) which are connected to each other. On the same cross-section, the cross-sectional shape of the first sub-chamber (1211) and the cross-sectional shape of the second sub-chamber (1212) are both formed into a circle. The inlet end (124a) of the oil outlet channel (124) is located at the connection between the first sub-chamber (1211) and the second sub-chamber (1212), and the cross-section is arranged perpendicular to the rotation axis of the first rotating member.

25. The engine (100) according to claim 24, characterized in that One of the connecting parts of the first sub-cavity (1211) and the second sub-cavity (1212) is formed as a guide protrusion (125) extending toward the inlet end (124a) of the oil outlet channel (124).

26. The engine (100) of claim 19, characterized in that The first oil inlet channel (122) and the second oil inlet channel (123) are arranged at an equal distance relative to the oil outlet channel (124).

27. A hybrid assembly (1000), characterized in that: include: An engine (100) according to any one of claims 1-26.

28. A vehicle, characterized in that: include: An engine (100) according to any one of claims 1-26; or a hybrid assembly (1000) according to claim 27.

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