Engine, hybrid power assembly and vehicle

Abstract

The invention discloses an engine, a hybrid power assembly and a vehicle, relates to the technical field of vehicles, and aims to solve the problem that the Z-direction space of a vehicle engine is limited. The engine comprises an oil can, an oil pan, a cylinder cover and an oil scavenger pump. The cylinder cover is provided with a cylinder cover oil return opening, the oil pan is provided with a pan oil return opening, an inlet of the oil return pump is connected with the cylinder cover oil return opening and the pan oil return opening respectively, and an outlet of the oil return pump is connected with the oil can.

Description

[0001] This invention claims the priority of the Chinese patent application titled "Engine and Vehicle Therewith" with the application number 202311760055.8 and filed with the National Intellectual Property Administration on December 19, 2023. The entire content thereof is incorporated herein by reference. Technical Field

[0002] This application relates to the technical field of vehicles, and particularly to an engine, a hybrid assembly, and a vehicle. Background Art

[0003] As the main power device of an automobile, the engine plays a crucial role in the stable operation of the automobile. And the oil pan of the engine, as an important component of the engine, mainly functions to store and provide the lubricating oil required for the engine working cycle.

[0004] Currently, the oil pan is usually disposed at the bottom of the engine block. After the lubricating oil in the block is lubricated, it returns to the oil pan under the action of gravity. And since the oil pan is a component for storing lubricating oil, the oil pan occupies a relatively large Z - direction space of the vehicle. Thus, undoubtedly, it will lead to limited Z - direction space for the vehicle engine. Summary of the Invention

[0005] This application provides an engine, a hybrid assembly, and a vehicle to solve the problem of limited Z - direction space for the vehicle engine.

[0006] In a first aspect, this application provides an engine, including an oil pot, an oil pan, a cylinder head, and an oil return pump; the cylinder head is provided with a cylinder head oil return port, the oil pan is provided with a bottom shell oil return port, the inlet of the oil return pump is respectively connected to the cylinder head oil return port and the bottom shell oil return port, and the outlet of the oil return pump is connected to the oil pot.

[0007] In the embodiments of this application, by connecting the inlet of the oil return pump to the cylinder head oil return port and the outlet of the oil return pump to the oil pot, thus, after lubricating the cylinder head, the lubricating oil can, under the action of the oil return pump, return to the oil pot through the cylinder head oil return port and the oil return pump. Additionally, the inlet of the oil return pump is also connected to the bottom shell oil return port. Then, after lubricating the cylinder head, the lubricating oil can, under the action of the oil return pump, return to the oil pot through the cylinder block oil return port, the bottom shell oil return port, and the oil return pump. In this way, since the lubricating oil in the cylinder head and the cylinder block returns to the oil pot under the action of the oil return pump, the lubricating oil can be stored in the oil pot. Then, the oil pan does not need to have the function of storing lubricating oil anymore, and the oil pan does not need to occupy a large amount of Z - direction space, which is beneficial to the downward shift of the center of gravity of the whole vehicle, thereby enhancing the driving stability of the vehicle. At the same time, it can alleviate the problem of limited Z - direction space design for the vehicle.

[0008] In some embodiments of the present application, the oil return pump includes a first type of oil return pump and a second type of oil return pump. The inlet of the first type of oil return pump is connected to the oil pan oil return port, and the inlet of the second type of oil return pump is connected to the cylinder head oil return port.

[0009] In some embodiments of the present application, the first type of oil return pump includes a first oil return pump and a fourth oil return pump. The number of oil pan oil return ports is multiple. At least one oil pan oil return port is provided on the front side of the oil pan, and at least one oil pan oil return port is provided on the rear side of the oil pan. The first oil return pump is connected to the oil pan oil return port on the rear side of the oil pan, and the fourth oil return pump is connected to the oil pan oil return port on the front side of the oil pan.

[0010] In some embodiments of the present application, the second type of oil return pump includes a second oil return pump and a third oil return pump. The cylinder head includes a left cylinder head and a right cylinder head. The left cylinder head is provided with a cylinder head oil return port on the front side of the left cylinder head and a cylinder head oil return port on the rear side of the left cylinder head. The right cylinder head is provided with a cylinder head oil return port on the front side of the right cylinder head and a cylinder head oil return port on the rear side of the right cylinder head. The second oil return pump is respectively connected to the cylinder head oil return port on the front side of the left cylinder head and the cylinder head oil return port on the rear side of the right cylinder head, and the third oil return pump is respectively connected to the cylinder head oil return port on the rear side of the left cylinder head and the cylinder head oil return port on the front side of the right cylinder head.

[0011] In some embodiments of the present application, the engine further includes a left cylinder block and a right cylinder block. The left cylinder block and the right cylinder block are arranged side by side left and right. The cylinder head includes a left cylinder head and a right cylinder head. The left cylinder head is provided on the side of the left cylinder block facing away from the right cylinder block, and the right cylinder head is provided on the side of the right cylinder block facing away from the left cylinder block.

[0012] In some embodiments of the present application, the left cylinder head is provided with a left cylinder head oil return port, and the left cylinder block is provided with a left cylinder block oil return port. The left cylinder head oil return port and the left cylinder block oil return port are communicated through a first oil passage. The left cylinder head oil return port is sequentially communicated to the oil return pump through the first oil passage and the left cylinder block oil return port; and / or, the right cylinder head is provided with a right cylinder head oil return port, and the right cylinder block is provided with a right cylinder block oil return port. The right cylinder head oil return port and the right cylinder block oil return port are communicated through the first oil passage of the right cylinder block. The right cylinder head oil return port is sequentially communicated to the oil return pump through the first oil passage of the right cylinder block and the right cylinder block oil return port.

[0013] In some embodiments of the present application, the engine further includes an oil supply pump and a cylinder block. The cylinder head covers one side of the cylinder block. A cylinder block lubricating oil passage is provided in the cylinder block. The cylinder block lubricating oil passage is provided with a cylinder block oil inlet. The inlet of the oil supply pump is connected to an oil pot, and the outlet of the oil supply pump is connected to the cylinder block oil inlet.

[0014] In some embodiments of the present application, the oil pan is communicated with the cylinder block lubricating oil passage to recover the lubricating oil in the cylinder block lubricating oil passage.

[0015] In some embodiments of the present application, the cylinder block includes a left cylinder block and a right cylinder block, the cylinder head includes a left cylinder head and a right cylinder head, the left cylinder block and the right cylinder block are arranged side by side left and right, the cylinder head includes a left cylinder head and a right cylinder head, the left cylinder head is disposed on one side of the left cylinder block facing away from the right cylinder block, and the right cylinder head is disposed on one side of the right cylinder block facing away from the left cylinder block; both the left cylinder block and the right cylinder block are provided with cylinder block lubricating oil channels, both the left cylinder head and the right cylinder head are provided with cylinder head lubricating oil channels, the cylinder block lubricating oil channel is provided with a cylinder block oil inlet, the cylinder block oil inlet is adapted to be connected to an oil supply pump, the cylinder head lubricating oil channel is provided with a cylinder head upper oil channel and a cylinder head oil return port, the cylinder head upper oil channel is communicated with the cylinder block lubricating oil channel, and the cylinder head oil return port is adapted to be connected to an oil return pump.

[0016] In a second aspect of the present application, a hybrid assembly is provided, and the hybrid assembly includes the engine described in the first aspect above.

[0017] In a third aspect of the present application, a vehicle is provided, and the vehicle includes the engine described in the first aspect above, or the hybrid assembly described in the second aspect.

[0018] It should be noted that for the technical effects brought by the implementation manners in the second aspect and the third aspect, reference may be made to the technical effects brought by the corresponding implementation manners in the first aspect, which will not be elaborated herein. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the technical solutions of the present invention, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solutions of the present invention, and do not constitute a limitation to the technical solutions of the present invention.

[0020] Figure 1 It is a schematic structural diagram of a vehicle provided by an embodiment of the present application;

[0021] Figure 2 It is one of the partial three-dimensional structural diagrams of an engine provided by an embodiment of the present application;

[0022] Figure 3 It is the second of the partial three-dimensional structural diagrams of an engine provided by an embodiment of the present application;

[0023] Figure 4 Provided by an embodiment of the present application Figure 2 It is one of the connection structure diagrams of the engine shown;

[0024] Figure 5 Provided by an embodiment of the present application Figure 2 The front view of the engine;

[0025] Figure 6 Provided by an embodiment of the present application Figure 2 It is the three-dimensional structural diagram of the oil pan shown;

[0026] Figure 7 The second schematic diagram of the connection structure of the engine provided by the embodiment of the present application Figure 2 as shown Specific embodiments

[0027] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0029] The terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0030] In the description of the present application, it should be noted that unless otherwise clearly defined and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations. In addition, when describing pipelines, the terms "connected" and "coupled" used in the present application have the meaning of conducting. The specific meaning needs to be understood in combination with the context.

[0031] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Rather, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific manner.

[0032] In the description of this specification, specific features, structures, materials, or characteristics may be combined in a suitable manner in any one or more embodiments or examples. This application provides a vehicle 1000. The vehicle 1000 can be a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid vehicle, a fuel vehicle, etc. The vehicle 1000 can also be a sedan, a truck, a bus, a lorry, a trailer, etc.

[0033] As Figure 1 shown, Figure 1 This is a schematic structural diagram of a vehicle provided by an embodiment of the present application. The vehicle 1000 includes a body and wheels. The body is for the driver and passengers to ride in and carry items, and the wheels are installed below the body to carry the body and can roll on the road surface to enable the vehicle 1000 to travel.

[0034] In some embodiments, the vehicle may further include a hybrid assembly, which is arranged on the body.

[0035] In a possible structural design, the hybrid assembly can be a drive assembly, which is used to convert electrical energy or thermal energy into mechanical energy and transmit the mechanical energy to the wheels to drive the wheels of the vehicle 1000 to rotate, enabling the vehicle 1000 to travel.

[0036] In another possible structural design, the hybrid assembly can also be a power generation assembly, which is used to convert other forms of energy (such as fuel combustion, etc.) into electrical energy. The power generation assembly can transmit the electrical energy to the drive assembly to enable the drive assembly to drive the wheels to rotate; it can also transmit the electrical energy to the vehicle's battery, and the battery outputs the electrical energy to the drive assembly to enable the drive assembly to drive the wheels to rotate; in other designs, the electrical energy output by the power generation assembly can also be transmitted to other electrical devices of the vehicle.

[0037] In a possible structural design, the hybrid assembly can include an engine, which is an energy conversion device that can convert the thermal energy or other forms of energy generated by fuel combustion into mechanical energy to drive the wheels to rotate.

[0038] Among them, the engine can be an internal combustion engine, an external combustion engine, a jet engine, etc., and this application does not make any limitations in this regard.

[0039] In another possible structural design, the hybrid assembly can include a motor, which is used to convert electrical energy into mechanical energy to drive the wheels to rotate.

[0040] In yet another possible structural design, the vehicle is a hybrid vehicle, and the hybrid assembly can include an engine and a motor.

[0041] It should be noted that in a hybrid vehicle, the relative positions of the engine and the motor may be affected by the power transmission path of the hybrid assembly. To simplify the power transmission system, reduce energy loss, or improve transmission efficiency, the engine may be disposed above the motor.

[0042] Among them, the engine, as the core power source of the vehicle 1000, plays a crucial role. And the lubrication system of the engine is the key to the operation and performance of the engine. The lubrication system of the engine transmits lubricating oil to the relevant components of the engine. The lubricating oil forms a thin film inside the engine to reduce friction and wear between the relevant components of the engine. Poor lubrication of the engine will have a negative impact on both the operation and life of the engine.

[0043] Based on this, an engine provided by an embodiment of the present application can be applicable to hybrid sedans, hybrid off-road vehicles, sport utility vehicles, etc. Among them, the overall Z-direction height of the engine is relatively low, especially suitable for being installed in the front engine compartment of a sedan with a relatively low overall Z-direction height. Due to the relatively low overall Z-direction height of the engine, an electric drive assembly can also be integrated in the front engine compartment of the sedan. The electric drive assembly may include one motor, and the power of one motor is distributed to two front wheels through a differential. The electric drive assembly may also include two motors, and the two motors respectively drive the two front wheels. In the front engine compartment of the sedan, the engine can be stacked above the drive assembly.

[0044] Please refer to Figure 2 、 Figure 3 and Figure 4 , Figure 2 and Figure 3 All show partial three-dimensional structural schematic diagrams of an engine provided by an embodiment of the present application. Figure 2 and Figure 3 are three-dimensional structural schematic diagrams of different perspectives of the engine. Figure 4 shows the Figure 2 connection structural schematic diagram of the engine shown in the present application. The engine 100 includes: an oil return pump 10, an oil pot 20, a cylinder block 30, and an oil pan 40. Among them, the oil pot 20 may be disposed outside the cylinder block 30.

[0045] In a possible structural design, the cylinder block 30 may include a cylinder block 31 and a cylinder head 32. The cylinder head 32 is covered on one side of the cylinder block 31. The cylinder head 32 is used to seal the cylinder block 31 to jointly form a closed combustion space. Inside this combustion space, the piston of the engine 100 can normally compress fuel and the mixture gas to generate power.

[0046] It can be understood that during the operation of the engine 100, lubricating oil is required to reduce the friction and wear between various moving parts (such as the crankshaft), thereby increasing the service life of the engine 100. To facilitate the collection of lubricating oil, the oil pan 40 is disposed below the engine block 30. Specifically, the oil pan 40 can be disposed below the cylinder block 31, so that the lubricating oil in the cylinder block 31 can fully flow back into the oil pan 40 under the action of gravity for continuous use of the engine 100.

[0047] Among them, the cylinder block 31 can provide support and positioning for components such as the pistons and crankshaft of the engine 100 to ensure that they can move along a predetermined trajectory and speed. Exemplarily, a crankshaft cavity 310 can be provided on the cylinder block 31, and the crankshaft is installed in the crankshaft cavity 310, and the crankshaft cavity 310 can provide support and positioning for the crankshaft. The cylinder block 31 can be made of a material with high strength and high rigidity. For example, the material of the cylinder block 31 can be cast iron or aluminum alloy, so as to ensure the stability and durability of the engine 100 during high-speed operation.

[0048] In addition, the cylinder block 31 can be provided with a cylinder block lubricating oil passage 31A, and the cylinder block lubricating oil passage 31A can be used to lubricate one or more of multiple components such as pistons, piston rings, cylinder walls, connecting rod bearings, and crankshaft bearings in the cylinder block 31. The oil pan 40 can be communicated with the cylinder block lubricating oil passage 31A to recover the lubricating oil in the cylinder block lubricating oil passage 31A. Among them, a cylinder block oil return port communicated with the cylinder block lubricating oil passage 31A can be provided on the cylinder block 31, and the orthographic projection of the cylinder block oil return port on the plane where the oil pan 40 is located is located in the oil pan 40. In this way, the lubricating oil can flow out from the cylinder block oil return port through the lubricating oil passage and can flow back into the oil pan 40 under the action of gravity.

[0049] In addition, a cylinder head lubricating oil passage 32A is provided in the cylinder head 32, and the cylinder head lubricating oil passage 32A can be used to lubricate one or more of multiple components such as cylinder head valves and camshafts. A cylinder head oil return port communicated with the cylinder head lubricating oil passage 32A is provided on the cylinder head 32. The cylinder head lubricating oil passage 32A is communicated with the cylinder block lubricating oil passage 31A, and the cylinder head oil return port is adapted to be connected to the oil return pump 10. Thus, the lubricating oil can enter the cylinder head lubricating oil passage 32A to lubricate the inner cavity of the cylinder head 32, and then the lubricating oil in the cylinder head lubricating oil passage 32A flows to the oil return pump 10 through the cylinder head oil return port to achieve oil return.

[0050] An accommodation space is provided in the oil pan 40, and a bottom shell oil return port communicated with the accommodation space is provided on the oil pan 40, and the accommodation space is used to accommodate lubricating oil. The inlet of the oil return pump 10 is respectively connected to the cylinder head oil return port and the bottom shell oil return port, and the outlet of the oil return pump 10 is connected to the oil pot 20.

[0051] In some examples of the present invention, the oil pot 20 is formed as an external oil pot 20, that is, the oil pot 20 is arranged outside the engine 100, so as to facilitate the installation of the oil pot 20.

[0052] In the embodiment of the present application, by connecting the inlet of the oil return pump 10 with the cylinder head oil return port and the outlet of the oil return pump 10 with the oil pot 20, in this way, after lubricating the cylinder head 32, the lubricating oil can return to the oil pot 20 under the action of the oil return pump 10 through the cylinder head oil return port and the oil return pump 10. In addition, the inlet of the oil return pump 10 is also connected to the oil pan oil return port. Then, after lubricating the cylinder head, the lubricating oil can return to the oil pot 20 under the action of the oil return pump 10 through the cylinder block oil return port, the oil pan oil return port and the oil return pump 10. In this way, since the lubricating oil in the cylinder head 32 and the cylinder block 31 returns to the oil pot 20 under the action of the oil return pump 10, the lubricating oil can be stored in the oil pot 20. Then, the oil storage requirement of the oil pan 40 is greatly reduced, and the oil pan 40 does not need to occupy a large amount of Z-direction space, which is beneficial to the downward movement of the center of gravity of the whole engine, thereby enhancing the driving stability of the vehicle 1000. At the same time, the problem of limited Z-direction space design of the vehicle 1000 can be alleviated.

[0053] Please refer to Figure 2 、 Figure 3 and Figure 5 , Figure 5 which shows the front view of the engine provided by the embodiment of the present application. In some embodiments of the present application, the cylinder block 31 may include a left cylinder block 311 and a right cylinder block 312. The left cylinder block 311 and the right cylinder block 312 are arranged side by side (i.e., along the width direction of the vehicle body). Figure 2 Among them, both the left cylinder block 311 and the right cylinder block 312 can be arranged above the oil pan 40. In addition, a cylinder block lubricating oil passage 31A can be arranged in both the left cylinder block 311 and the right cylinder block 312. The cylinder block lubricating oil passage 31A can be used to lubricate one or more of multiple components such as pistons, piston rings, cylinder walls, connecting rod bearings and crankshaft bearings in the cylinder block 31. The present application does not make any limitation on this.

[0054]

[0055] The orthographic projections of the cylinder lubricating oil passages 31A of the left cylinder 311 and the right cylinder 312 on the plane where the oil pan 40 is located can be located in the oil pan 40, so that the lubricating oil in the left cylinder 311 and the right cylinder 312 can be fully returned to the oil pan 40 under the action of gravity for continuous use of the engine 100. In other words, the oil pan 40 only needs to temporarily store the lubricating oil returned by gravity from the left cylinder 311 and the right cylinder 312, and this temporarily stored lubricating oil will be sucked into the oil pot 20 by the oil return pump 10 after a short stay. The return oil pump 10 of the present embodiment does not actively suck the return oil from the left cylinder 311 and the right cylinder 312. The reason is that the return oil pump 10 is arranged in the oil pan 40. In order to accommodate the return oil pump 10, a certain space is necessarily required in the oil pan 40. The present embodiment reuses the space of the oil pan 40 used to accommodate the return oil pump 10, and uses this space to temporarily store lubricating oil. On the one hand, the space utilization rate is improved. On the other hand, when the return oil pump 10 sucks the lubricating oil in the oil pan 40, the pipeline structure is simple, which simplifies the return oil pipeline setting of the return oil pump 10.

[0056] Exemplarily, the engine 100 may be a horizontally opposed engine 100, and the left cylinder block 311 and the right cylinder block 312 are arranged in a horizontal direction.

[0057] Since the design of the horizontally opposed engine 100 requires that the left cylinder 311 and the right cylinder 312 are arranged relative to each other at an angle of 180 degrees, this layout allows the pistons of the left cylinder 311 and the right cylinder 312 to reciprocate in the horizontal direction. If the two cylinders are set as an integrated structure, the complexity of design and manufacturing will be greatly increased. Therefore, in order to ensure that the left cylinder 311 and the right cylinder 312 are aligned at a precise position and angle, and at the same time ensure the tight fit and sealing between the components, the left cylinder 311 and the right cylinder 312 can be a split structure, and the left cylinder 311 and the right cylinder 312 can be connected by a connector.

[0058] Please refer to Figure 2 , Figure 3 , Figure 4 and Figure 5 The cylinder head may include a left cylinder head 321 and a right cylinder head 322. The left cylinder head 321 is arranged on the left side of the left cylinder body 311, and the right cylinder head 322 is arranged on the right side of the right cylinder body 312. That is, the left cylinder head 321 is arranged on the side of the left cylinder body 311 away from the right cylinder body 312, and the right cylinder head 322 is arranged on the side of the right cylinder body 312 away from the left cylinder body 311. The left cylinder head 321 is used to seal the left cylinder body 311 to form a closed combustion space together. The right cylinder head 322 is also used to seal the right cylinder body 312 to form a closed combustion space together.

[0059] Among them, a cylinder head lubricating oil passage 32A can be provided in both the left cylinder head 321 and the right cylinder head 322. The cylinder head lubricating oil passage 32A can be used to lubricate one or more of the components such as the cylinder head valves and camshafts. This application does not make any limitations in this regard.

[0060] It can be understood that when the engine 100 is a horizontally opposed engine 100, since the cylinders of the horizontally opposed engine 100 are arranged horizontally opposite to each other, this layout makes the overall height of the engine 100 decrease and the length shorten, thereby alleviating the problem that the Z - direction space design of the vehicle 1000 is restricted. At the same time, the center of gravity of the whole vehicle is also lower, thereby enhancing the driving stability of the vehicle 1000. To achieve this layout, the cylinder block of the engine 100 must adopt a design of splicing on the left and right, that is, the cylinder blocks on both sides are butt - jointed to form a complete engine 100 structure. This design results in relatively large dimensions of the engine 100 in the left - right direction (i.e., along the arrangement direction of the left cylinder block 311 and the right cylinder block 312) to accommodate moving parts such as cylinders, pistons, connecting rods, as well as the corresponding lubrication system and cooling system.

[0061] In addition, since the moving parts such as the cylinder block and piston of the engine 100 move in the horizontal direction, there is no need to set too many support structures in the middle part. And, in order to reduce the overall weight of the engine 100 and improve fuel economy, therefore, the Z - direction height of the middle part of the horizontally opposed engine 100 is set relatively thin.

[0062] The oil pan 40 of this application is arranged directly below the cylinder block, so as to make full use of the clearance below the horizontally opposed engine 100. To further alleviate the problem that the Z - direction space design of the vehicle 1000 is restricted, in the Z - direction, the orthographic projections of the left cylinder head 321 and the right cylinder head 322 of the embodiments of this application are located outside the orthographic projection of the oil pan 40, that is, the oil pan 40 arranged directly below the cylinder block does not extend directly below the left cylinder head 321 and the right cylinder head 322.

[0063] In this way, the oil pan 40 can make full use of the clearance below the horizontally opposed engine 100 without occupying the Z - direction space of the vehicle 1000, which is beneficial to the downward movement of the center of gravity of the whole vehicle, thereby enhancing the driving stability of the vehicle 1000. At the same time, it can further alleviate the technical problem that the Z - direction space design of the vehicle 1000 is restricted.

[0064] Please refer to Figures 1 to 6 , Figure 6 which shows the embodiments provided by this application Figure 2Schematic three-dimensional structure diagram of the oil pan shown. In some embodiments of the present application, at least one oil pan oil return port 41 is provided on the front side of the oil pan 40 (i.e., the side close to the vehicle head), and at least one oil pan oil return port 41 is provided on the rear side of the oil pan 40 (i.e., the side close to the vehicle tail). Each oil pan oil return port 41 is adapted to be connected to the oil return pump 10.

[0065] Thereby, at least one oil pan oil return port 41 is distributed on both the front side and the rear side of the oil pan 40. Thus, the lubricating oil on the front side and the rear side of the oil pan 40 can both achieve oil return through the oil return pump 10. In this way, it is convenient to improve the recovery efficiency of the lubricating oil at the oil pan 40, so that the oil pan 40 is formed into a dry sump oil pan 40. And by providing oil pan oil return ports 41 on both the rear side and the front side of the oil pan 40, no matter what working condition the vehicle 1000 is in (such as climbing or descending), the lubricating oil in the oil pan 40 can be pumped by the oil return pump 10 to achieve oil return.

[0066] In some embodiments of the present application, the oil return pump 10 may include a first type of oil return pump 10 and a second type of oil return pump 10. The inlet of the first type of oil return pump 10 is connected to the oil pan oil return port, and the inlet of the second type of oil return pump 10 is connected to the cylinder head oil return port.

[0067] Specifically, the oil return pump 10 may include a first type of oil return pump 101 and a second type of oil return pump 102. The first type of oil return pump 101 is in communication with the accommodation space in the oil pan 40. The first type of oil return pump 101 is used to extract the lubricating oil flowing from the cylinder block into the oil pan 40 and convey the lubricating oil into the oil pot 20. The second type of oil return pump 102 is in communication with the cylinder head lubricating oil passage 32A in the cylinder head 32. The second type of oil return pump 102 extracts the lubricating oil in the cylinder head 32 and conveys the lubricating oil into the oil pot 20.

[0068] In the embodiments of the present application, by providing the first type of oil return pump 101 and the second type of oil return pump 102 to separately suck the lubricating oil in the oil pan 40 and the cylinder head 32. Since the positions of the lubricating oil in the oil pan 40 and the cylinder head 32 are different, their flow characteristics and recovery difficulties also vary. The lubricating oil in the oil pan 40 mainly converges at the bottom under the action of gravity, while the lubricating oil in the cylinder head 32 is distributed around components such as the valve mechanism and the camshaft. Setting two types of oil return pumps 10 can perform specialized recovery for these two different regions to improve the recovery efficiency of the lubricating oil. And for the recovery of the lubricating oil in the oil pan 40, since its oil volume is relatively larger than that of the cylinder head 32, an independent oil return pump 10 (i.e., the first type of oil return pump 101) can precisely control the recovery flow rate and pressure. This helps to keep the lubricating oil volume in the oil pan 40 within a reasonable range and prevent the normal oil suction of the oil return pump 10 from being affected due to too much or too little lubricating oil.

[0069] In this way, the height of the engine 100 in the Z direction can also be reduced. The specific reasons are as follows:

[0070] Since the first type of oil return pump 101 and the second type of oil return pump 102 are provided, firstly, since the first type of oil return pump 101 can extract the lubricating oil from the cylinder head 32, the oil pan 40 no longer needs to recover the lubricating oil from the cylinder head 32, and therefore the oil pan 40 does not need to be located under the cylinder head 32; secondly, since the second type of oil return pump 102 can extract the lubricating oil from the oil pan 40, the oil pan 40 no longer needs to store the lubricating oil that flows back under the gravity of the cylinder body 31 for a long time, but instead serves as a transfer area for the lubricating oil that flows back under the gravity of the cylinder body 31, that is, the lubricating oil will not accumulate in the oil pan 40, and therefore the volume of the oil pan 40 can be made smaller.

[0071] Therefore, under the action of the first type of oil return pump 101 and the second type of oil return pump 102, the size of the oil pan 40 can be made smaller in the horizontal direction, and the height of the oil pan 40 can also be made smaller in the vertical direction, so the height of the engine 100 in the Z direction can be reduced.

[0072] See also Figures 1 to 7 , Figure 7 The embodiment of the present application provides Figure 2 In the schematic diagram of the connection structure of the engine shown in FIG. 1 , in some embodiments of the present application, the first type of oil return pump 101 includes a first oil return pump 1011 and a fourth oil return pump 1012. The number of the bottom shell oil return ports 41 is multiple. Optionally, the number of the bottom shell oil return ports 41 can be 2, 3, 4, 5, 6, 7, 8, etc., which is not limited in the embodiments of the present application.

[0073] In some embodiments, at least one sump oil return port 41 is provided on the front side of the oil sump 40, at least one sump oil return port 41 is provided on the rear side of the oil sump 40, the first oil return pump 1011 is connected to the sump oil return port 41 on the rear side of the oil sump 40, and the fourth oil return pump 1012 is connected to the sump oil return port 41 on the front side of the oil sump 40. Optionally, the inlets of the first oil return pump 1011 and the fourth oil return pump 1012 can be directly connected to the sump oil return port 41. Optionally, the inlets of the first oil return pump 1011 and the fourth oil return pump 1012 can also be indirectly connected to the sump oil return port 41. Exemplarily, the inlets of the first oil return pump 1011 and the fourth oil return pump 1012 can also be connected to the sump oil return port 41 through a pipeline and / or a component provided with a flow channel, which is not limited in the present application.

[0074] In some examples, there may be two sump oil return ports 41, which are relatively arranged at the front side of the oil sump 40 (i.e., the side close to the front of the vehicle) and the rear side of the oil sump 40 (i.e., the side close to the rear of the vehicle).

[0075] Since the number of the oil return ports 41 on the bottom shell is multiple and they are distributed on the front side and the rear side of the oil pan 40, lubricating oil at different positions can have corresponding oil return paths, avoiding the situation of local lubricating oil accumulation and untimely oil return that may occur when relying solely on the oil return port at a single position. The first oil return pump 1011 and the fourth oil return pump 1012 are respectively connected to the oil return ports 41 on different front and rear sides of the bottom shell, and can simultaneously extract and return the lubricating oil in the oil pan 40 from multiple directions, which can accelerate the overall oil return speed, ensure the efficient operation of the lubricating oil circulation system, enable each component of the engine 100 to be fully lubricated in a timely manner, and reduce problems such as wear caused by insufficient lubrication.

[0076] Moreover, the multiple oil return ports 41 on the bottom shell cooperate with two different oil return pumps 10 in the first type of oil return pump 101, which helps to make the oil distribution in the oil pan 40 more uniform. For example, the fourth oil return pump 1012 on the front side can timely extract and return the lubricating oil on the front side of the oil pan 40, and the first oil return pump 1011 on the rear side can also perform the same operation on the oil on the rear side, preventing the phenomenon of too large a local oil level drop in the oil pan 40. Furthermore, the entire lubricating oil circulation becomes more stable and orderly, ensuring that each lubricated part can receive an appropriate supply of lubricating oil as needed, and improving the stability and reliability of the entire lubrication system.

[0077] Please continue to refer to Figure 6 , in some other examples, the number of the oil return ports 41 on the bottom shell can be four, and the four oil return ports 41 can be respectively arranged at the left front, left rear, right front and right rear of the oil pan 40.

[0078] Exemplarily, as Figure 6 shown, the oil return port 41 on the bottom shell includes a first bottom shell oil return port 411, a second bottom shell oil return port 412, a third bottom shell oil return port 413 and a fourth bottom shell oil return port 414. The first bottom shell oil return port 411, the second bottom shell oil return port 412, the third bottom shell oil return port 413 and the fourth bottom shell oil return port 414 are arranged in a rectangular pattern and are respectively located at the left front, left rear, right front and right rear of the oil pan 40.

[0079] Specifically, the inlet of the first oil return pump 1011 is connected to the first bottom shell oil return port 411 and the fourth bottom shell oil return port 414, and the inlet of the fourth oil return pump 1012 is connected to the second bottom shell oil return port 412 and the third bottom shell oil return port 413.

[0080] Since the four bottom shell oil return ports 41 are arranged in a rectangle at the four corner positions (front left, rear left, front right, and rear right) of the oil pan 40, a wider area within the oil pan 40 can be covered. This ensures that regardless of how the lubricating oil flows and distributes within the oil pan 40, there is a suitable bottom shell oil return port 41 for collection. The first oil return pump 1011 is connected to the bottom shell oil return ports 41 at the front left and rear right, and the fourth oil return pump 1012 is connected to the bottom shell oil return ports 41 at the rear left and front right, enabling the lubricating oil within the oil pan 40 to be evenly pumped back from the four corner positions, avoiding the situation of lubricating oil accumulation in local areas while insufficient lubricating oil in other areas.

[0081] In addition, the design of this double first - type oil return pumps 101 and the four bottom shell oil return ports 41 distributed in a rectangle forms a redundant backup mechanism. For example, if one of the first - type oil return pumps 101 or one of the bottom shell oil return ports 41 fails, the other first - type oil return pump 101 can still perform the oil return work through the two bottom shell oil return ports 41 connected to it, ensuring that the oil return system will not completely fail. Moreover, since the bottom shell oil return ports 41 are distributed in four different positions, even if the oil return port in a certain area is blocked or damaged, the bottom shell oil return ports 41 in other areas can still work properly to maintain the circulation of the lubricating oil. In addition, the rectangular distribution of the four bottom shell oil return ports 41 and the connection method of the double first - type oil return pumps 101 make the flow path of the lubricating oil within the oil pan 40 more reasonable. That is, the lubricating oil can be pumped away by the first - type oil return pump 101 along the shortest path from each corner of the oil pan 40, reducing the ineffective flow and energy loss of the lubricating oil within the oil pan 40. At the same time, this layout can avoid the formation of vortices or dead zones of the oil fluid within the oil pan 40, improving the oil return efficiency.

[0082] Please continue to refer to Figures 1 to 7 , in some embodiments of the present application, the second - type oil return pump 102 includes a second oil return pump 1021 and a third oil return pump 1022. The left cylinder head 321 is provided with a cylinder head oil return port 321A on the front side of the left cylinder head 321 and a cylinder head oil return port 321B on the rear side of the left cylinder head 321. Both the cylinder head oil return port 321A on the front side of the left cylinder head 321 and the cylinder head oil return port 321B on the rear side of the left cylinder head 321 are connected to the cylinder head lubricating oil passage 32A of the left cylinder head 321.

[0083] The right cylinder head 322 is provided with an oil return port 322A on the front side of the right cylinder head 322 and an oil return port 322B on the rear side of the right cylinder head 322. Both the oil return port 322A on the front side of the right cylinder head 322 and the oil return port 322B on the rear side of the right cylinder head 322 are communicated with the cylinder head lubricating oil passage 32A of the right cylinder head 322. The second oil return pump 1021 is respectively connected to the oil return port 321A on the front side of the left cylinder head 321 and the oil return port 322B on the rear side of the right cylinder head 322, and the third oil return pump 1022 is respectively connected to the oil return port 321B on the rear side of the left cylinder head 321 and the oil return port 322A on the front side of the right cylinder head 322.

[0084] Optionally, the second oil return pump 1021 can be directly communicated with the oil return port 321A on the front side of the left cylinder head 321 and the oil return port 322B on the rear side of the right cylinder head 322, and the third oil return pump 1022 can also be directly communicated with the oil return port 321B on the rear side of the left cylinder head 321 and the oil return port 322A on the front side of the right cylinder head 322.

[0085] Optionally, the inlet of the second oil return pump 1021 can be indirectly communicated with the oil return port 321A on the front side of the left cylinder head 321 and the oil return port 322B on the rear side of the right cylinder head 322, and the inlet of the third oil return pump 1022 can also be indirectly communicated with the oil return port 321B on the rear side of the left cylinder head 321 and the oil return port 322A on the front side of the right cylinder head 322. Exemplarily, the inlets of the second oil return pump 1021 and the third oil return pump 1022 can also be communicated with the oil return port of the cylinder head through a pipeline and / or a component provided with a flow passage, and the present application does not limit this.

[0086] In the embodiment of the present application, by respectively connecting the second oil return pump 1021 and the third oil return pump 1022 to the oil return ports on different sides of the left cylinder head 321 and the right cylinder head 322, it can ensure that the lubricating oil from all positions of the cylinder head 32 can be effectively recovered. The left cylinder head 321 and the right cylinder head 322 are respectively provided with oil return ports on the front side and the rear side, and this distribution method can cover all regions where the lubricating oil may be distributed during the operation of the cylinder head 32.

[0087] In addition, this cross-connection method of the second oil return pump 1021 and the third oil return pump 1022 helps to balance the oil recovery of the left cylinder head 321 and the right cylinder head 322. When the engine 100 is running, the lubricating oil quantity and flow conditions in the left cylinder head 321 and the right cylinder head 322 may slightly vary due to the working states of the components. Through the cross-connection of the oil return pumps 10, it can ensure that no matter which side of which cylinder head the lubricating oil quantity suddenly increases or decreases, it can be recovered in time, maintaining the relative stability of the oil quantity in the cylinder head, and further maintaining the stability of the system pressure. A stable system pressure is crucial for the normal operation of the engine 100 because pressure fluctuations may affect the supply and lubrication effect of the lubricating oil.

[0088] In addition, if one of the second type of oil return pumps 102 (for example, the second oil return pump 1021) fails, the other second type of oil return pump 102 (for example, the third oil return pump 1022) can still recover part of the lubricating oil through the cylinder head oil return port it is connected to. This design provides a redundant backup mechanism, so that the oil return system will not completely fail due to the failure of a single oil return pump 10. At the same time, even if a certain cylinder head oil return port is blocked or damaged, the combination of other cylinder head oil return ports and the oil return pump 10 can still continue to work, maintaining the lubricating oil recovery process, and improving the fault tolerance of the entire system in the face of local failures.

[0089] Finally, this connection method between the oil return pump 10 and the cylinder head oil return port makes the path of the lubricating oil returning from the cylinder head to the oil pan 40 or other storage locations more reasonable. The lubricating oil can flow efficiently along the preset path, reducing the detours and ineffective flow of the oil in the cylinder head 32, thereby reducing the energy loss during the oil flow process.

[0090] In some embodiments of the present application, both the left cylinder block 311 and the right cylinder block 312 are provided with a first oil passage 33. One end of the first oil passage 33 is communicated with the cylinder head oil return port on the same side, and the other end of the first oil passage 33 is adapted to be connected to the oil return pump 10.

[0091] Thus, the lubricating oil at the cylinder head oil return port can flow to the oil return pump 10 via the first oil passage 33, so as to reduce the connection difficulty between the cylinder head oil return port and the oil return pump 10.

[0092] In some embodiments, the left cylinder head 321 is provided with a left cylinder head oil return port, the left cylinder block 311 is provided with a left cylinder block oil return port, the left cylinder block oil return port is communicated with the cylinder block lubricating oil passage 31A of the left cylinder block 311, the left cylinder head oil return port and the left cylinder block oil return port are communicated through the first oil passage 33, and the left cylinder head oil return port is sequentially communicated to the oil return pump 10 through the first oil passage 33 and the left cylinder block oil return port.

[0093] In this way, the left cylinder head oil return port and the left cylinder block oil return port are communicated through the first oil passage 33 and finally connected to the oil return pump 10, forming a complete oil return path. Such a design can ensure that the lubricating oil in the left cylinder head 321 and the left cylinder block 311 can be successfully recovered by the oil return pump 10. In the engine 100, the cylinder head 32 and the cylinder block 31 are important components and need lubricating oil for lubrication during operation. After these lubricating oils complete their lubrication missions, they need to be recovered in time. Through this connection method, the lubricating oil can flow out of the cylinder head 32 and the cylinder block 31 orderly, improving the oil return efficiency and avoiding the accumulation of lubricating oil in the cylinder head 32 and the cylinder block 31, thereby affecting the normal operation of the engine 100.

[0094] In addition, the existence of the first oil passage 33 enables the oil in the left cylinder head 321 and the left cylinder block 311 to flow more smoothly. It plays a buffering and regulating role, capable of balancing the oil pressure between the cylinder head 32 and the cylinder block 31. When the oil pressure in the cylinder head 32 is too high, the oil can quickly flow through the first oil passage 33 to the oil return port of the cylinder block; conversely, when the oil pressure in the cylinder block 31 is too high, the pressure can also be balanced through reverse flow. This pressure balance helps prevent oil leakage and ensures the uniform distribution of lubricating oil in the cylinder head 32 and the cylinder block 31, further improving the lubrication effect.

[0095] In some other embodiments, the right cylinder head 322 is provided with a right cylinder head oil return port, and the right cylinder block 312 is provided with a right cylinder block oil return port. The right cylinder block oil return port is communicated with the cylinder block lubricating oil passage 31A of the right cylinder block 312. The right cylinder head oil return port and the right cylinder block oil return port are communicated through the first oil passage 33 of the right cylinder block 312, and the right cylinder head oil return port is sequentially communicated to the oil return pump 10 through the first oil passage 33 of the right cylinder block 312 and the right cylinder block oil return port.

[0096] In this way, the right cylinder head oil return port and the right cylinder block oil return port are connected through the first oil passage 33 and finally communicated with the oil return pump 10, constructing an efficient lubricating oil recovery path. During the operation of the engine 100, the lubricating oil generated by either the right cylinder head 322 or the right cylinder block 312 can be smoothly collected by the oil return pump 10 through this passage, avoiding the residue of lubricating oil in the cylinder head and the cylinder block, thereby ensuring the cleanliness inside the engine 100 and improving the operating efficiency of the engine 100.

[0097] In addition, the first oil passage 33 can balance the lubricating oil pressure between the right cylinder head 322 and the right cylinder block 312. When the lubricating oil pressure in a certain area of the right cylinder head 322 or the right cylinder block 312 fluctuates, such as when the engine 100 starts, accelerates, or the load changes, the lubricating oil can flow between the two through the first oil passage 33 to restore the pressure balance. This pressure balance helps maintain the stable flow of lubricating oil in the cylinder head 32 and the cylinder block 31, preventing the occurrence of lubricating oil leakage or local lubrication insufficiency caused by too large a pressure difference, and thus ensuring the stable operation of the engine 100.

[0098] In addition, in some embodiments, since the oil pan 40 does not extend directly below the left cylinder head 321 and the right cylinder head 322, and the oil return pump 10 is disposed in the oil pan 40, and the second type of oil return pump 102 needs to be connected to the left cylinder head oil return port and the right cylinder head oil return port. If the second type of oil return pump 102 is directly connected to the left cylinder head oil return port and the right cylinder head oil return port through an external oil pipe, then an opening needs to be provided on the oil pan 40, and the opening needs to be sealed to ensure that the lubricating oil in the oil pan 40 does not leak. The solution is complex and the cost is high. In this embodiment, a first oil passage 33 is respectively provided on the left cylinder block 311 and the right cylinder block 312 to connect the second type of oil return pump 102 and the left cylinder head oil return port, and at the same time connect the second type of oil return pump and the right cylinder head oil return port. There is no need for an external oil pipe, nor is it necessary to make structural modifications and seals to the oil pan 40, which simplifies the solution and reduces the cost. It should be noted that the first oil passage 33 can be integrally formed during the machining of the left cylinder block 311 and the right cylinder block 312.

[0099] In some embodiments of the present application, the cylinder block lubricating oil passage 31A is provided with a cylinder block oil inlet, that is, a cylinder block oil inlet communicating with the cylinder block lubricating oil passage 31A is provided on the cylinder block 31. Please continue to refer to Figure 4 The engine 100 further includes an oil supply pump 50. The inlet of the oil supply pump 50 is connected to the oil pot 20, and the outlet of the oil supply pump 50 is connected to the cylinder block oil inlet to communicate with the cylinder block lubricating oil passage 31A through the cylinder block oil inlet.

[0100] In the embodiment of the present application, by connecting the inlet of the oil supply pump 50 to the oil pot 20 and the outlet to the cylinder block oil inlet, this design enables the lubricating oil to be accurately delivered to the cylinder block lubricating oil passage 31A. Through the action of the oil supply pump 50, an appropriate amount of lubricating oil can be delivered from the oil pot 20 to the inside of the cylinder block according to the actual requirements of the engine 100. During the operation of the engine 100, various components such as pistons and crankshafts require lubricating oil to reduce friction and wear. The setting of the cylinder block oil inlet ensures that the lubricating oil can directly enter the cylinder block lubricating oil passage 31A to provide timely and accurate lubrication for these components.

[0101] In some embodiments of the present application, the cylinder block lubricating oil passage 31A is provided with a cylinder block oil inlet, the cylinder block oil inlet is adapted to be connected to the oil supply pump 50, the cylinder head lubricating oil passage 32A is provided with a cylinder head upper oil passage and a cylinder head oil return port, the cylinder head upper oil passage is communicated with the cylinder block lubricating oil passage 31A, and the cylinder head oil return port is adapted to be connected to the oil return pump 10.

[0102] In the embodiment of the present application, by connecting the cylinder block oil inlet to the oil supply pump 50, lubricating oil can smoothly enter the cylinder block lubricating oil passage 31A to provide lubrication for the components inside the cylinder block 31. The cylinder head oil passage is communicated with the cylinder block lubricating oil passage 31A, ensuring that the lubricating oil can extend from the cylinder block 31 to the cylinder head 32 to effectively lubricate the components inside the cylinder head 32. At the same time, the cylinder head oil return port is connected to the oil return pump 10, enabling the lubricating oil after completing the lubrication task to be recycled in a timely manner. In this way, a complete circulation system from oil supply, lubrication to oil return is formed, ensuring that all key components of the engine 100 can continuously receive good lubrication during the working process, reducing the friction and wear between components, and extending the service life of the engine 100.

[0103] When understanding the scope of the present invention, as used herein, the term "comprising" and its derivatives are intended to be open-ended terms that specify the presence of the recited features, elements, components, groups, wholes, and / or steps, but do not exclude the presence of other unrecited features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "including", "having", and their derivatives.

[0104] As used herein, the term "attached" or "attachment" includes: a configuration in which an element is directly fixed to another element by directly fixing the element to the other element; a configuration in which an element is indirectly fixed to another element by fixing the element to an intermediate member, and the intermediate member is in turn fixed to the other element; and a configuration in which one element is integral with another element, that is, one element is substantially a part of the other element. This definition also applies to words with similar meanings, such as "connected", "coupled", "joined", "mounted", "adhered", "fixed", and their derivatives. Finally, degree terms such as "substantially", "about", and "approximately" as used herein represent the amount of deviation that modifies the term such that the final result will not change significantly.

[0105] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field of the present invention. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0106] The invention has been described through the above embodiments. However, it should be understood that the above embodiments are only for illustrative and explanatory purposes, and are not intended to limit the invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the invention, and these variations and modifications all fall within the scope of protection required by the invention.

Claims

1. An engine, characterized in that: It includes an oil pot, an oil pan, a cylinder head and an oil return pump; the cylinder head is provided with a cylinder head oil return port, the oil pan is provided with a bottom shell oil return port, the inlet of the oil return pump is respectively connected to the cylinder head oil return port and the bottom shell oil return port, and the outlet of the oil return pump is connected to the oil pot.

2. The engine according to claim 1, characterized in that The oil return pump includes a first type of oil return pump and a second type of oil return pump, the inlet of the first type of oil return pump is connected to the oil return port of the bottom shell, and the inlet of the second type of oil return pump is connected to the oil return port of the cylinder head.

3. The engine according to claim 2, characterized in that The first type of oil return pump includes a first oil return pump and a fourth oil return pump, the number of the sump oil return ports is multiple, at least one sump oil return port is provided on the front side of the oil sump, and at least one sump oil return port is provided on the rear side of the oil sump, the first oil return pump is connected to the sump oil return port on the rear side of the oil sump, and the fourth oil return pump is connected to the sump oil return port on the front side of the oil sump.

4. The engine according to claim 2, characterized in that The second type of oil return pump includes a second oil return pump and a third oil return pump, the cylinder head includes a left cylinder head and a right cylinder head, the left cylinder head is provided with a cylinder head oil return port on the front side of the left cylinder head and a cylinder head oil return port on the rear side of the left cylinder head, and the right cylinder head is provided with a cylinder head oil return port on the front side of the right cylinder head and a cylinder head oil return port on the rear side of the right cylinder head; The second oil return pump is respectively connected to the cylinder head oil return port on the front side of the left cylinder head and the cylinder head oil return port on the rear side of the right cylinder head, and the third oil return pump is respectively connected to the cylinder head oil return port on the rear side of the left cylinder head and the cylinder head oil return port on the front side of the right cylinder head.

5. The engine according to any one of claims 1 to 4, characterized in that: It also includes a left cylinder body and a right cylinder body, which are arranged left and right. The cylinder head includes a left cylinder head and a right cylinder head, the left cylinder head is arranged on the side of the left cylinder body away from the right cylinder body, and the right cylinder head is arranged on the side of the right cylinder body away from the left cylinder body.

6. The engine according to claim 5, characterized in that The left cylinder head is provided with a left cylinder head oil return port, the left cylinder body is provided with a left cylinder body oil return port, the left cylinder head oil return port and the left cylinder body oil return port are connected through a first oil passage, and the left cylinder head oil return port is connected to the oil return pump through the first oil passage and the left cylinder body oil return port in sequence; and / or, The right cylinder head is provided with a right cylinder head oil return port, and the right cylinder body is provided with a right cylinder body oil return port. The right cylinder head oil return port and the right cylinder body oil return port are connected through the first oil passage of the right cylinder body, and the right cylinder head oil return port is connected to the oil return pump in sequence through the first oil passage of the right cylinder body and the right cylinder body oil return port.

7. The engine according to any one of claims 1 to 4, characterized in that: It also includes an oil supply pump and a cylinder body, the cylinder head cover is arranged on one side of the cylinder body, a cylinder lubricating oil channel is arranged in the cylinder body, the cylinder lubricating oil channel is provided with a cylinder oil inlet, the inlet of the oil supply pump is connected to the oil pot, and the outlet of the oil supply pump is connected to the cylinder oil inlet.

8. The engine according to claim 7, characterized in that The oil pan is in communication with the cylinder lubricating oil passage to recover the lubricating oil in the cylinder lubricating oil passage.

9. The engine according to claim 8, characterized in that The cylinder body comprises a left cylinder body and a right cylinder body, the cylinder head comprises a left cylinder head and a right cylinder head, the left cylinder body and the right cylinder body are arranged left and right, the cylinder head comprises a left cylinder head and a right cylinder head, the left cylinder head is arranged on a side of the left cylinder body away from the right cylinder body, and the right cylinder head is arranged on a side of the right cylinder body away from the left cylinder body; The left cylinder block and the right cylinder block are both provided with cylinder block lubricating oil passages, the left cylinder head and the right cylinder head are both provided with cylinder head lubricating oil passages, the cylinder block lubricating oil passages are provided with cylinder block oil inlets, the cylinder block oil inlets are suitable for being connected to the oil supply pump, the cylinder head lubricating oil passages are provided with cylinder head upper oil passages and the cylinder head oil return port, the cylinder head upper oil passages are connected with the cylinder block lubricating oil passages, and the cylinder head oil return port is suitable for being connected to the oil return pump.

10. A hybrid assembly, characterized in that: Comprising the engine according to any one of claims 1 to 9.

11. A vehicle, characterized in that: It comprises the engine according to any one of claims 1 to 9, or the hybrid assembly according to claim 10.

Images