An engine and vehicle

Abstract

The application provides an engine and a vehicle, wherein the engine comprises a cylinder head, a cylinder body and an oil-gas separator, the cylinder head is provided with a cylinder head oil pool and a cylinder head flow channel, the cylinder head flow channel penetrates the cylinder head along the thickness direction of the cylinder head, the upper end of the cylinder head flow channel is connected with the cylinder head oil pool, the cylinder body is provided with a cylinder body flow channel, the upper end of the cylinder body flow channel is communicated with the lower end of the cylinder head flow channel, and the lower end of the cylinder body flow channel is communicated with the crankcase of the cylinder body, and the oil-gas separator is arranged above the cylinder head and is used for carrying out oil-gas separation on the gas which flows out from the crankcase and sequentially passes through the cylinder body flow channel, the cylinder head flow channel and the cylinder head oil pool. Through the application, the occupied space of the cylinder head can be reduced, and the compactness of the overall structure of the engine is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle parts, and more particularly, to an engine and a vehicle. BACKGROUND

[0002] In the related art, an oil return channel is arranged in an oil pool chamber of an engine cylinder head, and an independent crankcase gas extraction pipeline is arranged on the other side of the cylinder head. The oil return channel is used to return a large amount of lubricating oil accumulated on the top side of the cylinder head during engine operation to an oil pan of an engine cylinder block, and the gas extraction pipeline is used to discharge high-temperature gas from the engine cylinder into the crankcase.

[0003] However, the coexistence of the oil return channel and the gas extraction pipeline in the cylinder head increases the occupied space of the cylinder head and reduces the compactness of the overall structure of the engine. SUMMARY

[0004] The present application provides an engine and a vehicle, which can reduce the occupied space of the cylinder head and improve the compactness of the overall structure of the engine.

[0005] In a first aspect, the present application provides an engine, comprising:

[0006] a cylinder head, the cylinder head being provided with a cylinder head oil pool and a cylinder head flow channel, the cylinder head flow channel penetrating through the cylinder head along the thickness direction of the cylinder head, and the upper end of the cylinder head flow channel being connected to the cylinder head oil pool;

[0007] a cylinder block, the cylinder block being provided with a cylinder block flow channel, the upper end of the cylinder block flow channel being in communication with the lower end of the cylinder head flow channel, and the lower end of the cylinder block flow channel being in communication with a crankcase of the cylinder block;

[0008] an oil-gas separator, the oil-gas separator being arranged above the cylinder head and being used for oil-gas separation of gas flowing out from the crankcase and sequentially passing through the cylinder block flow channel and the cylinder head flow channel into the cylinder head oil pool;

[0009] wherein the cylinder head flow channel is a tapered hole flow channel, the upper end diameter of the tapered hole flow channel is greater than the lower end diameter, and the angle of the tapered hole is 2° to 40°.

[0010] In the above technical solution, the independent crankcase gas extraction pipeline arranged on the other side of the cylinder head is omitted, and the oil return of the cylinder head and the gas extraction of the crankcase can be simultaneously realized through only one channel including the cylinder head flow channel and the cylinder block flow channel. It can be seen that the occupied space of the cylinder head can be reduced and the compactness of the overall structure of the engine can be improved through the present solution.

[0011] In some possible implementation manners of the first aspect, a cross-sectional area of the port at the upper end of the cylinder block flow passage is larger than a cross-sectional area of the port at the lower end of the cylinder head flow passage.

[0012] In the technical solution, the port at the upper end of the cylinder block flow passage is larger than the port at the lower end of the cylinder head flow passage, so that a larger cavity space is formed at the joint of the cylinder block flow passage and the cylinder head flow passage, and the lubricating oil flowing down from the cylinder head flow passage is separated from the gas flowing up from the cylinder block flow passage. In this way, the lubricating oil flowing down from the cylinder head flow passage directly flows back downward, and the gas flowing up from the cylinder block flow passage can gather on the side of the cylinder block top surface far away from the cylinder head flow passage, and the gathered gas has higher rising energy and can effectively overcome the gravity of the lubricating oil flowing downward, so that more gas can more smoothly move upward through the cylinder head flow passage and enter the cylinder head oil pool. Therefore, the backflow performance of the gas in the crankcase can be improved.

[0013] In the first aspect and the above implementation manners, the end of the cylinder head close to the cylinder block is provided with a groove, and the groove opening corresponds to the port at the upper end of the cylinder block flow passage.

[0014] The cylinder head flow passage penetrates the groove bottom.

[0015] In the technical solution, the groove corresponding to the port at the upper end of the cylinder block flow passage is arranged at the end of the cylinder head close to the cylinder block, so that the cavity space at the joint of the cylinder block flow passage and the cylinder head flow passage is increased, and the smoothness of the gas backflow in the crankcase is further improved.

[0016] In the first aspect and the above implementation manners, the hole diameter of the cylinder head flow passage gradually decreases from the upper end to the lower end of the cylinder head flow passage.

[0017] In the technical solution, the structure that the cylinder head flow passage is wide at the upper end and narrow at the lower end makes the part of the passage gradually expand, which is beneficial to the rapid diffusion of the gas. Therefore, the collision of the gas flowing up from the cylinder block flow passage and the lubricating oil flowing down from the cylinder head flow passage in the cylinder head flow passage can be effectively prevented, and the backflow of the oil and the upward movement of the gas are not impeded.

[0018] In the first aspect and the above implementation manners, the upper end of the cylinder block flow passage is provided with a tilt portion, a transition portion and an extension portion connected in sequence.

[0019] The tilt portion is located below the cylinder head flow passage.

[0020] In the technical solution, the lubricating oil flowing back down from the cylinder head flow passage can flow downward along the tilt portion by using the tilt portion below the cylinder head flow passage, so that the breaking of the lubricating oil droplets is effectively prevented, the carrying amount of the lubricating oil droplets in the rising gas in the cylinder head flow passage is reduced, and the pressure of the oil-gas separator is reduced.

[0021] In combination with the first aspect and the above implementation manners, the cylinder head flow channel and the cylinder block flow channel are arranged at an engine intake side and / or an engine exhaust side.

[0022] In the above technical solution, the change of the installation angle of the engine can be adapted to, and the oil return requirement of the engine cylinder head and the air intake requirement of the crankcase under different engine compartments can be met.

[0023] In combination with the first aspect and the above implementation manners, the engine further comprises an oil pump seat and a high-pressure oil pump; the cylinder head is provided with a cam operation hole; the oil pump seat is arranged at a position corresponding to the cam operation hole, and the oil pump seat is provided with an oil pump mounting hole coaxial with the cam operation hole;

[0024] The high-pressure oil pump is arranged in the oil pump mounting hole; and an angle between an axis of the oil pump mounting hole and a top surface of the cylinder head is less than or equal to 80°.

[0025] In the above technical solution, the high-pressure oil pump is arranged on the cylinder head through the oil pump mounting hole on the cylinder head, and the angle between the axis of the oil pump mounting hole and the top surface of the cylinder head is set to be less than or equal to 80°, that is, the top of the high-pressure oil pump is arranged towards the bottom surface of the cylinder head, which can effectively reduce the height of the high-pressure oil pump relative to the bottom surface of the cylinder head, improve the mode of the cylinder head and the high-pressure oil pump, improve the vibration mode of the entire engine, and improve the NVH (Noise, Vibration, Harshness) performance of the engine.

[0026] In combination with the first aspect and the above implementation manners, the cylinder head is further provided with an oil return hole; the oil return hole is arranged at one end of the cam operation hole close to the oil pump mounting hole;

[0027] The oil return hole is in communication with the cam operation hole and the cylinder head flow channel respectively, and one end of the oil return hole connected to the cam operation hole is located above one end of the oil return hole connected to the cylinder head flow channel.

[0028] In the above technical solution, the oil return hole in communication with the cam operation hole and the cylinder head flow channel is arranged at one end of the cam operation hole close to the oil pump mounting hole, that is, at the lower part of the cam operation hole, which can guide the lubricating oil gathered in the oil pump mounting hole to flow to the cylinder head oil return channel, effectively prevent the lubricating oil from gathering in the oil pump mounting hole, avoid the oil stirring of the oil pump spring when the high-pressure oil pump is working, affect the normal working of the high-pressure oil pump, and reduce the performance of the engine.

[0029] In combination with the first aspect and the above implementation manners, a distance between the oil return hole and a bottom end surface of the oil pump mounting hole is less than or equal to 10 mm.

[0030] In the technical scheme, the oil return hole is arranged at the bottom end face of the oil pump mounting hole or close to the bottom end face of the oil pump mounting hole, so that the lubricating oil in the oil pump mounting hole can smoothly flow to the cylinder head oil return passage when the high-pressure oil pump is working, the oil pump spring oil stirring phenomenon is effectively prevented, and the working reliability of the high-pressure oil pump is improved.

[0031] In a second aspect, the application further provides a vehicle comprising the engine of any one of the first aspect. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is a partial structure schematic diagram of an engine provided by an embodiment of the application;

[0033] Figure 2 is Figure 1 is a structure schematic diagram of an engine in which a high-pressure oil pump is mounted on a cylinder head;

[0034] Figure 3 is Figure 2 is a sectional view along the line A-A in the figure;

[0035] Figure 4 is Figure 3 is a sectional view along the line B-B in the figure.

[0036] The explanation of each reference numeral in the figure is as follows:

[0037] 1 - cylinder head; 11 - cylinder head oil pool; 12 - cylinder head flow passage; 13 - groove; 14 - cam operating hole; 15 - oil pump mounting hole; 16 - oil return hole; 17 - plugging;

[0038] 2 - cylinder block; 21 - cylinder block flow passage; 211 - inclined part; 212 - transition part; 213 - extension part;

[0039] 3 - high-pressure oil pump;

[0040] 41 - oil pump cam;

[0041] α - included angle between oil pump mounting hole axis and cylinder head top surface;

[0042] d - distance between oil return hole and bottom end face of oil pump mounting hole. DETAILED DESCRIPTION

[0043] The technical solutions in the application will be clearly and completely described below with reference to the drawings. In the description of the embodiments of the application, unless otherwise specified, " / " represents the meaning of or, for example, A / B can represent A or B: "and / or" in the text only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, in the description of the embodiments of the application, "multiple" means two or more than two.

[0044] Hereinafter, the terms "first" and "second" are used only for descriptive purposes and cannot be understood as implying or suggesting relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more features.

[0045] In the related art, the oil return channel and the independent crankcase gas taking pipeline coexist in the engine cylinder head, which increases the occupied space of the cylinder head and reduces the compactness of the overall structure of the engine.

[0046] To solve the above technical problems, the application provides an engine and a vehicle. First, a kind of engine provided by the embodiments of the application is introduced in detail with reference to the drawings of the specification.

[0047] Please refer to Figure 1 , Figure 1 is a partial structure schematic diagram of the engine in an embodiment of the application. First, the first aspect of the application provides an engine, which includes a cylinder head 1, a cylinder block 2 and an oil-gas separator (not shown in the figure).

[0048] The cylinder head 1 is provided with a cylinder head oil pool 11 and a cylinder head flow channel 12; the cylinder head flow channel 12 penetrates the cylinder head 1 along the thickness direction of the cylinder head 1; the upper end of the cylinder head flow channel 12 is connected with the cylinder head oil pool 11.

[0049] The cylinder block 2 is provided with a cylinder block flow channel 21, the upper end of the cylinder block flow channel 21 is communicated with the lower end of the cylinder head flow channel 12, and the lower end of the cylinder block flow channel 21 is communicated with the crankcase (not shown in the figure) of the cylinder block 2.

[0050] The oil-gas separator is arranged above the cylinder head 1, and is used for oil-gas separation of the gas flowing out from the crankcase and entering the cylinder head oil pool 11 in sequence through the cylinder block flow channel 21 and the cylinder head flow channel 12.

[0051] It should be noted that the cylinder block 2 is integrated by each cylinder and the crankcase. The crankcase includes an upper crankcase and a lower crankcase, which is also called an oil pan, for storing lubricating oil (engine oil) and enclosing the upper crankcase. The cylinder head 1 is installed on the upper part of the cylinder block 2, seals the cylinder from the upper part of the cylinder block 2 to form a combustion chamber, and serves as a carrier of the valve train. During engine operation, the valve train of the cylinder head 1 is lubricated by a large amount of lubricating oil, so a large amount of lubricating oil will accumulate on the top side of the cylinder head. These lubricating oils first flow back to the cylinder head oil pool 11. If these lubricating oils do not flow back to the oil pan of the crankcase in time, not only will the cylinder head cover leak oil, but also under the high-speed movement of the valve spring of the valve train, a large amount of bubbles will appear in the lubricating oil, accelerating the oxidation of the lubricating oil and affecting the lubricating performance of the lubricating oil.

[0052] In addition, during the compression and expansion strokes of the engine piston, high-temperature gases in the cylinder will enter the crankcase through the gap between the piston and the cylinder liner during engine operation. If these high-temperature gases cannot be discharged from the crankcase in time, the pressure in the oil pan will rise, causing the lubricating oil to be contaminated, diluted and deteriorated, and shortening the service life of the lubricating oil.

[0053] In the present application, the length of the cylinder head flow channel 12 can be 0.3-0.8 times the overall height of the cylinder head 1. The one-end port of the cylinder head flow channel 12 can be located on the bottom wall of the cylinder head oil pool 11, or on the side wall of the cylinder head oil pool 11, or outside the cylinder head oil pool 11. When the one-end port of the cylinder head flow channel 12 is located on the side wall of the cylinder head oil pool 11 or outside the cylinder head oil pool 11, only when the liquid level of the cylinder head oil pool 11 reaches a certain height or the lubricating oil overflows the cylinder head oil pool 11, the lubricating oil will flow into the cylinder head flow channel 12 and flow back to the oil pan of the crankcase. Therefore, by locating the one-end port of the cylinder head flow channel 12 on the side wall of the cylinder head oil pool 11 or outside the cylinder head oil pool 11, the amount of lubricating oil flowing into the cylinder head flow channel 12 from the cylinder head oil pool 11 can be reduced, and the auxiliary oil return of the lubricating oil in the cylinder head oil pool 11 can be achieved.

[0054] In the present application, by providing the cylinder head flow channel 12 on the cylinder head 1 and the cylinder block flow channel 21 on the cylinder block 2, and connecting the cylinder head flow channel 12 and the cylinder block flow channel 21, on the one hand, the gases in the crankcase of the cylinder block 2 can enter the cylinder head flow channel 12 through the cylinder block flow channel 21, then enter the cylinder head oil pool 11, and finally be separated into oil and gas in the oil-gas separator on the upper part of the cylinder head 1; on the other hand, the lubricating oil in the cylinder head oil pool 11 can flow back to the cylinder block flow channel 21 through the cylinder head flow channel 12, and finally return to the oil pan of the crankcase.

[0055] The application scheme eliminates the independent crankcase gas taking pipeline arranged on the other side of the cylinder cover 1, and only one channel including the cylinder cover flow channel 12 and the cylinder body flow channel 21 can realize the oil return of the cylinder cover 1 and the gas taking of the crankcase at the same time. It can be seen that the application scheme can reduce the occupied space of the cylinder cover 1 and improve the compactness of the overall structure of the engine.

[0056] In addition, the overall structure of the application scheme is simple, the processing and manufacturing process is good, the weight of the cylinder cover 1 can be effectively reduced, and the cost of the engine is reduced.

[0057] Referring to Figure 1 In some embodiments of the application, the cross-sectional area size of the upper end port of the cylinder body flow channel 21 is larger than the cross-sectional area size of the lower end port of the cylinder cover flow channel 12.

[0058] The cross-sectional area size of the upper end port of the cylinder body flow channel 21 and the lower end port of the cylinder cover flow channel 12 can be selected according to different models of engines. For example, the diameter of the upper end port of the cylinder body flow channel 21 can be 50mm~150mm. The diameter of the lower end port of the cylinder cover flow channel 12 can be 5mm~30mm.

[0059] In the embodiments of the application, the port at the upper end of the cylinder body flow channel 21 is larger than the port at the lower end of the cylinder cover flow channel 12, which can form a larger cavity space at the connection between the cylinder body flow channel 21 and the cylinder cover flow channel 12, so that the lubricating oil flowing down from the cylinder cover flow channel 12 and the gas flowing up from the cylinder body flow channel 21 are separated. In this way, the lubricating oil flowing down from the cylinder cover flow channel 12 directly flows back downward, and the gas flowing up from the cylinder body flow channel 21 can be gathered on the side of the top surface of the cylinder body 2 away from the cylinder cover flow channel 12. The gathered gas has a high rising energy, which can effectively overcome the gravity of the lubricating oil flowing downward, so that more gas can more smoothly move upward through the cylinder cover flow channel 12 and enter the cylinder cover oil pool 11. Therefore, the application scheme can improve the backflow performance of the gas in the crankcase.

[0060] In some embodiments of the application, the end of the cylinder cover 1 close to the cylinder body 2 is provided with a groove 13; the slot of the groove 13 corresponds to the port at the upper end of the cylinder body flow channel 21. The cylinder cover flow channel 12 penetrates the slot bottom of the groove 13.

[0061] The size of the groove 13 can change with the size of the port at the upper end of the cylinder body flow channel 21, and the depth of the groove 13 can be selected according to different engine models, experience data or test results, for example, it can be 2mm~30mm.

[0062] The application embodiment can increase the cavity space of the connecting part of the cylinder flow channel 21 and the cylinder head flow channel 12, and further improve the smoothness of the crankcase gas backflow, by setting the groove 13 corresponding to the upper end port of the cylinder flow channel 21 at the end of the cylinder head 1 close to the cylinder body 2.

[0063] Referring to Figure 1 In some embodiments of the application, the hole diameter of the cylinder head flow channel 12 gradually decreases from the upper end to the lower end of the cylinder head flow channel 12.

[0064] The cross-sectional shape of the hole diameter of the cylinder head flow channel 12 can be various, such as circular, oval, etc., which is not limited in the application. The hole diameter of the cylinder head flow channel 12 gradually decreases, that is, the cylinder head flow channel 12 is set to be wide at the top and narrow at the bottom. The cylinder head flow channel 12 can be a conical hole flow channel, and the angle of the conical hole can be 2°-40°.

[0065] The lubricating oil in the cylinder head flow channel 12 flows close to the inner wall under the action of vehicle inertia, and part of the channel can be left for gas to pass through. The structure of the cylinder head flow channel 12 being wide at the top and narrow at the bottom in the application scheme makes the part of the channel gradually expand, which is beneficial to the rapid diffusion of gas. Therefore, it can effectively prevent the gas flowing upward from the cylinder flow channel 21 from colliding with the lubricating oil flowing downward from the cylinder head flow channel 12 in the cylinder head flow channel 12, resulting in poor oil return and poor gas flow.

[0066] In some embodiments of the application, the upper end of the cylinder flow channel 21 is provided with an inclined part 211, a transition part 212 and an extension part 213 connected in turn. The inclined part 211 is located below the cylinder head flow channel 12.

[0067] Referring to Figure 1 The inclined part 211, the transition part 212 and the extension part 213 are connected to form a concave structure, so that the upper end of the cylinder flow channel 21 is gradually narrowed. The inclined part 211 has a certain angle with the dropping direction of the lubricating oil in the cylinder head flow channel 12, and is used to receive the lubricating oil dropped from the cylinder head flow channel 12. The inclined part 211 can be provided as an inclined surface, which forms a certain angle with the top surface of the cylinder body 2, and the angle can be 2°-50°. The transition part 212 is used to connect the inclined part 211 and the extension part 213, so that the lubricating oil dropped on the inclined part 211 flows smoothly to the extension part 213. The transition part 212 can adopt a circular arc transition, and the radius of the circular arc can be 20mm-100mm.

[0068] The application scheme uses the inclined part 211 below the cylinder head flow channel 12 to receive the lubricating oil, so that the lubricating oil flowing downward from the cylinder head flow channel 12 flows downward along the inclined part 211, effectively preventing the lubricating oil droplets from breaking, reducing the amount of lubricating oil droplets carried in the rising gas of the cylinder head flow channel 12, and reducing the pressure of the oil-gas separator.

[0069] In some embodiments of the present application, the cylinder head flow channel 12 and the cylinder block flow channel 21 are arranged on the engine intake side and / or the engine exhaust side.

[0070] The engine intake side is provided with an air inlet and connected with an air intake manifold, and the engine exhaust side is provided with an exhaust port and connected with an exhaust manifold.

[0071] In some embodiments of the present application, a set of cylinder head flow channels 12 and cylinder block flow channels 21 can be arranged on the engine intake side, or a set of cylinder head flow channels 12 and cylinder block flow channels 21 can be arranged on the engine exhaust side, or a set of cylinder head flow channels 12 and cylinder block flow channels 21 can be arranged on the engine intake side and the exhaust side respectively.

[0072] Even if the engine compartment structure is different, and the installation angle of the engine changes due to the transverse or longitudinal arrangement, the arrangement of the cylinder head flow channel 12 and the cylinder block flow channel 21 on the engine intake side and / or the engine exhaust side in the present application can adapt to the change of the installation angle of the engine, and meet the oil return requirement of the engine cylinder head 1 and the air intake requirement of the crankcase under different engine compartment conditions.

[0073] Referring to Figure 2 and Figure 3 , Figure 2 is a structural schematic view of the installation of the high-pressure oil pump 3 on the engine cylinder head in an embodiment of the present application; Figure 3 is Figure 2 the cross-sectional view along the line A-A in

[0074] In some embodiments of the present application, the engine further comprises an oil pump seat and a high-pressure oil pump 3; the cylinder head 1 is provided with a cam operating hole 14; the oil pump seat is arranged at the corresponding cam operating hole 14, and the oil pump seat is provided with an oil pump mounting hole 15 coaxial with the cam operating hole 14.

[0075] The high-pressure oil pump 3 is arranged in the oil pump mounting hole 15; the angle a between the axis of the oil pump mounting hole 15 and the top surface of the cylinder head 1 is less than or equal to 80°.

[0076] The cylinder head 1 and the oil pump seat can be integrally cast, and the oil pump mounting hole 15 can be formed by machining.

[0077] It should be noted that the intake camshaft or the exhaust camshaft of the valve gear mechanism of the cylinder head 1 is provided with an oil pump cam 41, and the intake camshaft or the exhaust camshaft moves with the movement of the piston to drive the oil pump cam 41 to rotate. The cam edge of the oil pump cam 41 is always in contact with the plunger of the high-pressure oil pump 3, and when the oil pump cam 41 rotates, it drives the plunger of the high-pressure oil pump 3 to move linearly, establishing high-pressure oil pressure.

[0078] In the embodiments of the present application, the high-pressure oil pump 3 is installed on the cylinder head 1 through the oil pump mounting hole 15 on the cylinder head 1, and the angle a between the axis of the oil pump mounting hole 15 and the top surface of the cylinder head 1 is set to be less than or equal to 80°, that is, the top of the high-pressure oil pump 3 is arranged towards the bottom surface of the cylinder head 1, which can effectively reduce the height of the high-pressure oil pump 3 relative to the bottom surface of the cylinder head 1, improve the modal of the cylinder head 1 and the high-pressure oil pump 3, improve the vibration modal of the entire engine, and improve the NVH (Noise, Vibration, Harshness) performance of the engine.

[0079] Referring to Figures 2 to 4 , Figure 4 is Figure 3 a sectional view along the line B-B in FIG. 1.

[0080] In some embodiments of the present application, the cylinder head 1 is further provided with an oil return hole 16; the oil return hole 16 is arranged at one end of the cam running hole 14 close to the oil pump mounting hole 15.

[0081] The oil return hole 16 is in communication with the cam running hole 14 and the cylinder head flow channel 12 respectively, and the one end of the oil return hole 16 connected with the cam running hole 14 is located above the one end of the oil return hole 16 connected with the cylinder head flow channel 12.

[0082] It should be noted that the oil pump cam 41 is installed in the cam running hole 14, and when the oil pump cam 41 is running, lubricating oil needs to be added in the cam running hole 14 for lubrication, so as to reduce the friction between the oil pump cam 41 and the cam running hole 14 and reduce the wear of the cam running hole 14. However, during the lubrication process, the lubricating oil is easy to flow from the cam running hole 14 into the oil pump mounting hole 15 and accumulate in the oil pump mounting hole 15, which causes the oil pump spring to stir the oil when the high-pressure oil pump 3 is working, thereby affecting the normal work of the high-pressure oil pump 3.

[0083] The one end of the oil return hole 16 connected with the cam running hole 14 being located above the one end of the oil return hole 16 connected with the cylinder head flow channel 12 means that the oil return hole 16 is arranged obliquely, that is, the one end of the oil return hole 16 connected with the cam running hole 14 is higher than the one end of the oil return hole 16 connected with the cylinder head flow channel 12, which means that the angle between the axis of the oil return hole 16 and the top surface of the cylinder head 1 is less than 90°. The diameter of the oil return hole 16 can be determined according to factors such as the specifications and models of the high-pressure oil pump 3, for example, can be 2mm-20mm.

[0084] In addition, the upper part of the oil return hole 16 can be sealed by a plugging 17 to prevent the lubricating oil from leaking to the outer surface of the cylinder head 1 through the oil return hole 16. The plugging 17 can be a steel ball, a bowl plug, a tapered plug or a plug with a rubber sealing ring.

[0085] The oil return hole 16 is arranged at the bottom end surface of the oil pump mounting hole 15 or close to the bottom end surface of the oil pump mounting hole 15, so that the lubricating oil in the oil pump mounting hole 15 can flow to the cylinder head oil return passage 3 when the high-pressure oil pump 3 is working, effectively preventing the oil pump spring from stirring the oil, affecting the normal work of the high-pressure oil pump 3, and reducing the performance of the engine.

[0086] Referring to Figure 3 In some embodiments of the present application, the distance d between the oil return hole 16 and the bottom end surface of the oil pump mounting hole 15 is less than or equal to 10 mm.

[0087] The oil return hole 16 is arranged at the bottom end surface of the oil pump mounting hole 15 or close to the bottom end surface of the oil pump mounting hole 15, so that the lubricating oil in the oil pump mounting hole 15 can flow to the cylinder head oil return passage 3 when the high-pressure oil pump 3 is working, effectively preventing the oil pump spring from stirring the oil, affecting the normal work of the high-pressure oil pump 3, and reducing the performance of the engine.

[0088] In summary, in the above technical solution, by optimizing the structure of the cylinder head 1 and the cylinder block 2, setting the cylinder head flow passage 12 and the cylinder block flow passage 21, and integrating the high-pressure oil pump 3 in the cylinder head 1, the technical solution can be applied to various engine models, such as in-line engines, V-type engines, etc.

[0089] Secondly, the second aspect of the present application also provides a vehicle comprising the engine of any one of the above embodiments.

[0090] The vehicle provided by the present application has all the beneficial effects of the engine described above. The engine has been described in detail above and will not be described here.

[0091] The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present application, it should be understood that the orientations or positional relationships indicated by terms such as "upper", "lower", "left", "right" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary description, and cannot be understood as a limitation of the present patent, for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0092] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An engine, characterized in that, include: Cylinder head (1), the cylinder head (1) is provided with cylinder head oil sump (11) and cylinder head flow channel (12); the cylinder head flow channel (12) extends through the cylinder head (1) along the thickness direction of the cylinder head (1); the upper end of the cylinder head flow channel (12) is connected to the cylinder head oil sump (11); Cylinder block (2), the cylinder block (2) is provided with cylinder block flow channel (21), the upper end of the cylinder block flow channel (21) is connected to the lower end of the cylinder head flow channel (12), and the lower end of the cylinder block flow channel (21) is connected to the crankcase of the cylinder block (2). An oil-gas separator is disposed above the cylinder head (1) and is used to separate the oil and gas from the gas flowing out of the crankcase and passing through the cylinder block flow channel (21) and the cylinder head flow channel (12) in sequence into the cylinder head oil sump (11). The cross-sectional area of ​​the upper port of the cylinder block flow channel (21) is larger than the cross-sectional area of ​​the lower port of the cylinder head flow channel (12); The cylinder head (1) has a groove (13) at one end near the cylinder body (2). The groove (13) is aligned with the port at the upper end of the cylinder body flow channel (21). The cylinder head flow channel (12) passes through the bottom of the groove (13). The cylinder head flow channel (12) is a tapered hole flow channel, and the upper diameter of the tapered hole flow channel is larger than the lower diameter. The angle of the tapered hole is 2° to 40°.

2. The engine as claimed in claim 1, characterized in that, The diameter of the cylinder head flow channel (12) gradually decreases from the upper end to the lower end of the cylinder head flow channel (12).

3. The engine as described in claim 1 or 2, characterized in that, The upper end of the cylinder flow channel (21) is provided with an inclined part (211), a transition part (212) and an extension part (213) connected in sequence. The inclined portion (211) is located below the cylinder head flow channel (12).

4. The engine as claimed in claim 1, characterized in that, The cylinder head flow passage (12) and the cylinder block flow passage (21) are located on the engine intake side and / or the engine exhaust side.

5. The engine as described in claim 1 or 2, characterized in that, The engine also includes an oil pump seat and a high-pressure oil pump (3); the cylinder head (1) is provided with a cam running hole (14); the oil pump seat is located at the location corresponding to the cam running hole (14), and the oil pump seat is provided with an oil pump mounting hole (15) coaxial with the cam running hole (14). The high-pressure oil pump (3) is located in the oil pump mounting hole (15); the angle between the axis of the oil pump mounting hole (15) and the top surface of the cylinder head (1) is less than or equal to 80°.

6. The engine as described in claim 5, characterized in that, The cylinder head (1) is also provided with an oil return hole (16); the oil return hole (16) is located at one end of the cam running hole (14) near the oil pump mounting hole (15); The oil return hole (16) is connected to the cam running hole (14) and the cylinder head flow channel (12) respectively, and the end of the oil return hole (16) connected to the cam running hole (14) is located above the end of the oil return hole (16) connected to the cylinder head flow channel (12).

7. The engine as claimed in claim 6, characterized in that, The distance between the oil return hole (16) and the bottom end face of the oil pump mounting hole (15) is less than or equal to 10 mm.

8. A vehicle, characterized in that, Includes the engine as described in any one of claims 1 to 7.

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