Novel two-stroke engine

Abstract

The invention relates to the technical field of engines, and particularly discloses a novel two-stroke engine which comprises an oil pan, an oil cylinder and a piston. An air cylinder is installed at the top end of the oil pan, air inlet and outlet mechanisms are installed in the middles of the two ends of the air cylinder in an embedded mode, a cylinder cover is installed at the top end of the air cylinder, and a lubricating mechanism is installed on the outer wall of the oil pan. Through cooperative work of the intake and exhaust passage, the intake and exhaust hole, the intake and exhaust valve, the limiting groove and the limiting block, opening or closing of a gas passage is achieved by rotating the intake and exhaust valve, gasoline is directly injected, so that the engine does not need to combust mixed gas, emission is reduced, and the problem of emission pollution caused by mixed gas combustion of a traditional two-stroke engine is effectively solved; meanwhile, according to the design, the air-fuel ratio can be accurately regulated and controlled, mixed gas short circuit and unburned HC emission are reduced, the environment-friendly performance and combustion efficiency of the engine are improved, the two-stroke engine is longer in service life, and compared with a four-stroke engine, the two-stroke engine is lighter in dead weight, low in production cost and more suitable for hybrid power vehicle types.

Description

Technical Field

[0001] The invention belongs to the technical field of engines, and in particular relates to a novel two-stroke engine. Background Art

[0002] A two-stroke engine is an internal combustion engine that completes a complete working cycle through two piston strokes. Its core features are simple structure, high power density and light weight. Ventilation is directly achieved through the intake and exhaust ports on the cylinder wall without the need for a complex valve mechanism. Compared with a four-stroke engine, its structure is simpler and its power density is higher. Therefore, it is often used in small power equipment such as motorcycles, lawn mowers, and drones.

[0003] Traditional two-stroke engines usually complete ventilation through the intake and exhaust ports on the cylinder wall. Therefore, the engine needs to burn a mixture of gasoline and lubricating oil. During the combustion process, the combustion of lubricating oil will produce more pollutants, resulting in higher engine emissions and short service life. Summary of the Invention

[0004] The object of the present invention is to provide a novel two-stroke engine to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A new two-stroke engine, comprising:

[0007] Oil pan;

[0008] A cylinder is installed at the top of the oil pan, an intake and exhaust mechanism is embedded in the middle of both ends of the cylinder, a cylinder head is installed at the top of the cylinder, a lubrication mechanism is installed on the outer wall of the oil pan, and an electronically controlled oil injector is embedded on one side of the top of the cylinder head;

[0009] The intake and exhaust mechanism includes an intake and exhaust duct, an intake and exhaust hole, an intake and exhaust valve, a limit groove and a limit block. The intake and exhaust duct is embedded in the middle of one end of the cylinder, the intake and exhaust hole is opened on the outer wall of the intake and exhaust duct close to the cylinder, and the intake and exhaust valve is installed inside the intake and exhaust duct. There are two limit grooves and two limit blocks. The two limit grooves are respectively opened on both sides of the outer wall of the intake and exhaust duct, and the two limit blocks are respectively installed on both sides of the outer wall of the intake and exhaust valve.

[0010] Preferably, the intake and exhaust holes are communicated with the cylinder, an intake and exhaust valve in the intake and exhaust mechanism for intake is installed with an intake pressurizing device, the limit block is configured as a convex structure, and the limit block is slidably connected to the corresponding limit groove.

[0011] Preferably, a crankshaft is mounted between the inner walls of both sides of the oil pan via bearings, a connecting rod is mounted on the middle of the outer surface of the crankshaft via bearings, a piston is mounted on the upper part of the outer surface of the connecting rod via bearings, and a spark plug is embedded in the middle of the top end of the cylinder head.

[0012] Preferably, an intake and exhaust pipeline is opened in the middle of one end of the intake and exhaust valve, a coolant pipeline is arranged inside the intake and exhaust valve, and an avoidance groove is opened in the middle of the outer wall of the intake and exhaust valve.

[0013] Preferably, the intake and exhaust pipes are configured as a T-shaped structure, and the intake and exhaust pipes are communicated with the avoidance groove, the coolant pipe is configured as a spiral structure, and oil channels are provided inside the crankshaft and inside the connecting rod.

[0014] Preferably, the lubrication mechanism includes an oil pump, a drive shaft, an oil extraction pipe, a cooling pipe and an oil cooler, the drive shaft is installed in the middle of one end of the oil pump, and the other end of the drive shaft is installed at one end of the crankshaft, the oil extraction pipe is installed in the middle of the bottom end of the oil pump, and the other end of the oil extraction pipe is installed at the lower part of one end of the oil pan, the cooling pipe is installed in the middle of the top end of the oil pump, and the oil cooler is installed in the middle of the outer surface of the cooling pipe.

[0015] Preferably, an oil filter is installed at the other end of the cooling pipe, an oil pipe is installed at the middle of the top end of the oil filter, and two shunt pipes are provided on one side of the outer surface of the oil pipe.

[0016] Preferably, the other ends of the two diversion pipes are respectively connected to bearings at the connection between the oil pan and the crankshaft, and the oil extraction pipe is located in the bottom area of the oil pan.

[0017] Preferably, mounting holes are provided at the four corners of the top of the cylinder cover, mounting bolts are placed inside the four mounting holes, mounting grooves are provided at the four corners of the top of the cylinder, a sealing groove is provided in the middle of the top of the cylinder, a sealing ring is embedded in the middle of the bottom end of the cylinder cover, and a plurality of sealing sheets are installed on the lower part of the outer surface of the sealing ring.

[0018] Preferably, the mounting hole is configured as a convex structure, the sealing groove and the sealing ring are both configured as annular structures, and the sealing sheet is configured as an annular sealing sheet in contact with the inner wall of the sealing groove.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] (1) The present invention realizes the opening or closing of the gas channel by rotating the intake and exhaust valves through the coordinated work of the intake and exhaust passages, intake and exhaust holes, intake and exhaust valves, limit grooves and limit blocks. The direct injection of gasoline eliminates the need for the engine to burn the mixture, thereby reducing emissions and effectively avoiding the emission pollution problems caused by the combustion of the mixture in traditional two-stroke engines. At the same time, the design can accurately control the air-fuel ratio, reduce the short circuit of the mixture and the emission of unburned HC, and improve the environmental performance and combustion efficiency of the engine.

[0021] (2) The present invention realizes the precise circulation and efficient cooling of the engine oil through the coordinated work of components such as the oil pump, transmission shaft, oil extraction pipe, cooling pipe and oil cooler, and accurately delivers the engine oil to key moving parts such as the crankshaft and connecting rod, ensuring that these parts are fully lubricated during high-speed operation. At the same time, the complete separation design of the engine oil and the combustion process avoids the carbon deposit problem caused by the participation of the lubricating oil in combustion, further improving the reliability and economy of the engine.

[0022] (3) The present invention forms a double sealing structure through the coordinated work of the cylinder, cylinder head, sealing groove, sealing ring and sealing sheet, and the close fit between the sealing ring and sealing sheet and the sealing groove, which effectively prevents the leakage of high-pressure gas or lubricating oil in the cylinder. This design not only improves the sealing performance of the engine and reduces energy loss, but also adapts to complex working conditions through the high temperature resistance and corrosion resistance of silicone material, further ensuring the long-term stable operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A perspective view of the present invention;

[0024] Figure 2 is a cross-sectional view of the engine of the present invention;

[0025] Figure 3 is a cross-sectional view of the intake and exhaust mechanism of the present invention;

[0026] Figure 4 is a cross-sectional view of the intake and exhaust valves of the present invention;

[0027] Figure 5 is a three-dimensional diagram of the lubrication mechanism of the present invention;

[0028] Figure 6 is a cross-sectional view of the lubrication mechanism of the present invention;

[0029] Figure 7 This is a diagram showing the connection between the cylinder and the cylinder head of the present invention;

[0030] Figure 8 is a cross-sectional view of the sealing ring and sealing sheet of the present invention;

[0031] Figure: 1. Oil pan; 2. Cylinder; 3. Intake and exhaust mechanism; 4. Cylinder head; 5. Lubrication mechanism; 6. Electronic fuel injector; 7. Crankshaft; 8. Connecting rod; 9. Piston; 10. Spark plug; 11. Mounting hole; 12. Mounting bolt; 13. Mounting slot; 14. Sealing slot; 15. Sealing ring; 16. Sealing disc;

[0032] 31. Intake and exhaust ducts; 32. Intake and exhaust holes; 33. Intake and exhaust valves; 34. Limiting grooves; 35. Limiting blocks; 36. Intake and exhaust pipes; 37. Coolant pipes; 38. Avoidance grooves;

[0033] 51. Oil pump; 52. Drive shaft; 53. Oil extraction pipe; 54. Cooling pipe; 55. Oil cooler; 56. Oil filter; 57. Oil pipeline; 58. Diverter pipe. DETAILED DESCRIPTION

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] Example 1:

[0036] See also Figures 1 to 8 As shown, a new two-stroke engine comprises:

[0037] Oil pan 1;

[0038] A cylinder 2 is mounted on the top of the oil pan 1. An intake and exhaust mechanism 3 is embedded in the middle of both ends of the cylinder 2. A cylinder head 4 is mounted on the top of the cylinder 2. A lubrication mechanism 5 is mounted on the outer wall of the oil pan 1. An electronically controlled fuel injector 6 is embedded on one side of the top of the cylinder head 4.

[0039] The intake and exhaust mechanism 3 includes an intake and exhaust duct 31, an intake and exhaust hole 32, an intake and exhaust valve 33, a limiting groove 34 and a limiting block 35. The intake and exhaust duct 31 is embedded in the middle of one end of the cylinder 2. The intake and exhaust hole 32 is opened on the outer wall of the intake and exhaust duct 31 close to the cylinder 2. The intake and exhaust valve 33 is installed inside the intake and exhaust duct 31. There are two limiting grooves 34 and two limiting blocks 35. The two limiting grooves 34 are respectively opened on both sides of the outer wall of the intake and exhaust duct 31, and the two limiting blocks 35 are respectively installed on both sides of the outer wall of the intake and exhaust valve 33.

[0040] Depend on Figures 1 to 4It can be seen that a crankshaft 7 is mounted between the inner walls of both sides of the oil pan 1 via bearings, a connecting rod 8 is mounted on the middle of the outer surface of the crankshaft 7 via bearings, a piston 9 is mounted on the upper part of the outer surface of the connecting rod 8 via bearings, and a spark plug 10 is embedded in the middle of the top end of the cylinder head 4;

[0041] An intake and exhaust pipeline 36 is opened in the middle of one end of the intake and exhaust valve 33 , a coolant pipeline 37 is arranged inside the intake and exhaust valve 33 , and an avoidance groove 38 is opened in the middle of the outer wall of the intake and exhaust valve 33 .

[0042] As can be seen from the above, during the working process, one or more intake and exhaust mechanisms 3 can be arranged according to actual needs, and the installation position of the intake and exhaust mechanism 3 is between the upper and lower dead centers of the piston 9. When the engine is in the intake stroke, the intake and exhaust valve 33 on one side is rotated to open the intake and exhaust pipe 36, and fresh air enters the cylinder 2 through the intake and exhaust pipe 36 and the intake and exhaust hole 32 to provide the necessary oxygen for combustion. During the rotation of the intake and exhaust valve 33, the limit block 35 of the convex structure is slidably connected with the limit groove 34 to ensure that the intake and exhaust valve 33 moves within a predetermined range and prevents it from being over-opened or over-closed, thereby ensuring smooth and stable intake. The two inner seals are arranged precisely at the junction of the intake and exhaust valves 33 and the intake and exhaust duct 31 near the inside of the cylinder 2, which can prevent the gas in the cylinder 2 from leaking from the gap between the intake and exhaust valves 33 and the inner wall of the intake and exhaust duct 31 when the valve is closed, thereby ensuring the sealing of the cylinder 2 and enabling the combustion chamber to effectively compress and perform work. The two outer seals are arranged at the outer junction of the intake and exhaust valves 33 and the intake and exhaust duct 31 away from the cylinder 2, which can prevent external air or impurities from entering the intake and exhaust pipes 36, and at the same time can also prevent the gas in the intake and exhaust pipes 36 from leaking outward to a certain extent, thereby maintaining the gas in the intake and exhaust pipes 36. The stable flow of fuel, such a sealing design helps to ensure the smooth progress of the engine's intake and exhaust process, improve the engine's working efficiency and performance, and then reduce emissions through gasoline direct injection. The electronically controlled fuel injector 6 sprays fuel directly into the cylinder 2, mixing it with air to form a combustible mixture, effectively avoiding the emission pollution problem caused by the combustion of the mixture in the traditional two-stroke engine. When the piston 9 moves upward to compress the mixture to near the top dead center, the spark plug 10 ignites and ignites the mixture, pushing the piston 9 downward to do work. At the end of the power stroke, in the exhaust stroke, the intake and exhaust valve 33 on the other side is rotated in the same way to open the intake and exhaust pipes 36 therein. The exhaust gas is discharged from the cylinder 2 through the intake and exhaust holes 32 and the intake and exhaust pipes 36. In addition, the spiral structure coolant pipe 37 arranged inside the intake and exhaust valves 33 effectively reduces the temperature of the intake and exhaust valves 33 by increasing the flow path and residence time of the coolant in the pipe, thereby improving its working stability and durability. Ultimately, the engine achieves efficient combustion and power output through the above-mentioned cycle process. This design prevents the two-stroke engine from emitting blue smoke, prolongs its service life, and reduces emission pollution. Moreover, this design can accurately control the air-fuel ratio, reduce the short-circuiting of the mixture and the emission of unburned HC, and significantly improve the environmental performance and combustion efficiency of the engine.

[0043] Specifically, refer to Figures 1 to 4As shown, the intake and exhaust holes 32 are communicated with the cylinder 2, and an intake and exhaust valve 33 in the intake and exhaust mechanism 3 for intake is installed with an intake pressurizing device, the limit block 35 is set to a convex structure, and the limit block 35 is slidably connected with the corresponding limit groove 34; the intake and exhaust pipeline 36 is set to a T-type structure, and the intake and exhaust pipeline 36 is communicated with the avoidance groove 38, the coolant pipeline 37 is set to a spiral structure, and oil channels are provided inside the crankshaft 7 and the connecting rod 8.

[0044] As can be seen from the above, it is ensured that fresh air can smoothly enter the cylinder 2 for combustion, and at the same time the exhaust gas can be discharged from the cylinder 2 to maintain the normal working cycle of the engine. The intake pressure device can provide intake pressure to ensure normal ventilation and improve the engine charging efficiency. The convex structure of the limit block 35 is slidably connected to the limit groove 34, which can limit the movement range of the intake and exhaust valves 33 to prevent them from excessive movement, which is conducive to the intake and exhaust pipes 36 to input air into the cylinder 2 or discharge exhaust gas from the cylinder 2, thereby improving the intake and exhaust efficiency; the avoidance groove 38 provides avoidance space for the movement of the piston 9, and the spiral structure of the coolant pipeline 37 can increase the flow path and residence time of the coolant in the pipeline, thereby improving the cooling effect. The oil channel is used to transport engine oil to lubricate and cool moving parts such as the crankshaft 7 and connecting rod 8, reduce friction and wear, and extend the service life of the components.

[0045] Example 2:

[0046] refer to Figure 5 and Figure 6 As shown, the lubrication mechanism 5 includes an oil pump 51, a transmission shaft 52, an oil extraction pipe 53, a cooling pipe 54, and an oil cooler 55. The transmission shaft 52 is mounted in the middle of one end of the oil pump 51, and the other end of the transmission shaft 52 is mounted on one end of the crankshaft 7. The oil extraction pipe 53 is mounted in the middle of the bottom end of the oil pump 51, and the other end of the oil extraction pipe 53 is mounted on the lower part of one end of the oil pan 1. The cooling pipe 54 is mounted in the middle of the top end of the oil pump 51, and the oil cooler 55 is mounted in the middle of the outer surface of the cooling pipe 54.

[0047] An oil filter 56 is installed at the other end of the cooling pipe 54 , an oil delivery pipe 57 is installed at the middle of the top end of the oil filter 56 , and two shunt pipes 58 are provided on one side of the outer surface of the oil delivery pipe 57 .

[0048] As can be seen from the above, during the working process, the rotation of the crankshaft 7 drives the oil pump 51 to work through the transmission shaft 52, and the oil pump 51 extracts oil from the oil pan 1 through the oil extraction pipe 53. The oil then enters the cooling pipe 54 and then flows into the oil cooler 55 to reduce the temperature, so as to ensure that the oil can maintain a suitable temperature during the circulation process and improve the lubrication effect. The cooled oil flows into the oil filter 56 through the cooling pipe 54. After filtering out impurities, the oil enters the oil delivery pipe 57 and is respectively delivered to the bearings at the connection between the crankshaft 7 and the oil pan 1 through two branch pipes 58, ensuring that these components are fully lubricated during high-speed operation. Lubrication effectively reduces internal friction and wear and extends the service life of components. At the same time, oil channels are provided inside the crankshaft 7 and the connecting rod 8. These oil channels are used to transport engine oil, further lubricate and cool the crankshaft 7 and the connecting rod 8, thereby ensuring the stability and reliability of the engine at high speeds, extending the service life of the engine, and achieving precise circulation and efficient cooling of the engine oil. At the same time, the complete separation design of the engine oil and the combustion process avoids the carbon deposit problem caused by the participation of lubricating oil in combustion, further improving the reliability and economy of the engine, and providing solid support for the long-term stable operation of the engine.

[0049] Preferably, reference Figure 5 and Figure 6 As shown, the other ends of the two shunt pipes 58 are respectively connected to the bearings at the connection between the oil pan 1 and the crankshaft 7 , and the oil extraction pipe 53 is located in the bottom area of the oil pan 1 .

[0050] As can be seen from the above, it is beneficial for the diverter pipe 58 to transport the engine oil to the bearings at the connection between the crankshaft 7 and the oil pan 1, providing lubrication for these key components, ensuring that they can maintain stability and reduce wear during high-speed operation. The oil extraction pipe 53 is located at the bottom of the oil pan 1, which is convenient for extracting the engine oil in the oil pan 1 when the engine is working, realizing the circulation of the engine oil, and providing continuous lubrication and cooling for various engine components.

[0051] Example 3:

[0052] refer to Figure 7 and Figure 8 As shown, mounting holes 11 are provided at the four corners of the top of the cylinder head 4, mounting bolts 12 are placed inside the four mounting holes 11, mounting grooves 13 are provided at the four corners of the top of the cylinder 2, a sealing groove 14 is provided in the middle of the top of the cylinder 2, a sealing ring 15 is embedded in the middle of the bottom end of the cylinder head 4, and a plurality of sealing sheets 16 are installed on the lower part of the outer surface of the sealing ring 15.

[0053] As can be seen from the above, a sealing layer is formed between the cylinder head 4 and the cylinder 2 through the sealing ring 15 and the sealing sheet 16, and the sealing groove 14 and the sealing ring 15 are both set as annular structures to ensure that the two are tightly fitted to form an effective sealing layer to prevent liquid leakage. The sealing sheet 16 is set as an annular sealing sheet in contact with the inner wall of the sealing groove 14, which has excellent elasticity and sealing performance. It is in close contact with the inner wall of the sealing groove 14 to form a multiple sealing structure, providing an additional sealing layer, further effectively preventing the leakage of gas or lubricating oil in the cylinder 2 and enhancing the sealing performance. This design not only improves the sealing performance of the engine and reduces energy loss, but also adapts to complex working conditions through the high temperature resistance and corrosion resistance of the silicone material, further ensuring the long-term stable operation of the engine, and the mounting hole 11 is set as a convex structure to accommodate the screw head of the mounting bolt 12, which is convenient for installation and fixation, and also convenient for opening the cylinder head 4 to inspect the inside of the cylinder 2.

[0054] Preferably, reference Figure 7 and Figure 8 As shown, the mounting hole 11 is configured as a convex structure, the sealing groove 14 and the sealing ring 15 are both configured as annular structures, and the sealing sheet 16 is configured as an annular sealing sheet in contact with the inner wall of the sealing groove 14 .

[0055] As can be seen from the above, the convex mounting hole 11 can accommodate the screw head of the mounting bolt 12, and the annular structure ensures that the sealing groove 14 and the sealing ring 15 fit tightly to form an effective sealing layer to prevent liquid leakage. The sealing sheet 16 is in close contact with the inner wall of the sealing groove 14, providing an additional sealing layer to further prevent liquid leakage and enhance the sealing performance.

[0056] Application examples:

[0057] This design is applied to power equipment that requires high power density, simple structure and light weight. By optimizing the intake and exhaust mechanism 3, the intake and exhaust pipes 36 therein can be controlled to open or close by rotating the intake and exhaust valves 33, and the gasoline is directly injected in conjunction with the electronically controlled fuel injector 6 to accurately control the air-fuel ratio. This not only effectively avoids the emission pollution problem caused by the combustion of the mixture in the traditional two-stroke engine, but also significantly improves the environmental performance and combustion efficiency of the engine. At the same time, the design also provides an efficient lubrication mechanism 5 to accurately deliver the engine oil to key moving parts such as the crankshaft 7 and connecting rod 8, thereby achieving complete separation of the lubricating oil and the combustion process, significantly reducing It reduces internal engine wear, extends service life, and reduces maintenance frequency. In addition, an annular sealing ring 15 and a sealing sheet 16 are used between the cylinder head 4 and the cylinder 2 to form a tight sealing layer to prevent gas or liquid leakage, further enhancing the sealing performance and reliability of the engine. This engine design is particularly suitable for equipment environments such as motorcycles, lawn mowers, drones, and small generators that have high requirements for power performance, fuel economy, environmental protection, and reliability. In these applications, the engine not only improves the overall performance of the equipment, but also reduces maintenance costs, providing a more efficient and environmentally friendly power solution for applications in various fields.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A new two-stroke engine, characterized in that: include: Oil pan (1); A cylinder (2) is installed at the top of the oil pan (1), an intake and exhaust mechanism (3) is embedded in the middle of both ends of the cylinder (2), a cylinder cover (4) is installed at the top of the cylinder (2), a lubrication mechanism (5) is installed on the outer wall of the oil pan (1), and an electronically controlled oil injection nozzle (6) is embedded on one side of the top of the cylinder cover (4); The intake and exhaust mechanism (3) comprises an intake and exhaust passage (31), an intake and exhaust hole (32), an intake and exhaust valve (33), a limiting groove (34) and a limiting block (35); the intake and exhaust passage (31) is embedded in the middle of one end of the cylinder (2); the intake and exhaust hole (32) is provided on the outer wall of the intake and exhaust passage (31) close to the cylinder (2); the intake and exhaust valve (33) is installed inside the intake and exhaust passage (31); two limiting grooves (34) and two limiting blocks (35) are provided; the two limiting grooves (34) are respectively provided on both sides of the outer wall of the intake and exhaust passage (31); and the two limiting blocks (35) are respectively installed on both sides of the outer wall of the intake and exhaust valve (33).

2. A novel two-stroke engine according to claim 1, characterized in that: The intake and exhaust holes (32) are in communication with the cylinder (2); an intake and exhaust valve (33) in the intake and exhaust mechanism (3) for intake is provided with an intake pressurizing device; the limit block (35) is provided as a convex structure, and the limit block (35) is slidably connected to the corresponding limit groove (34).

3. A novel two-stroke engine according to claim 1, characterized in that: A crankshaft (7) is mounted between the inner walls of both sides of the oil pan (1) via bearings, a connecting rod (8) is mounted on the middle portion of the outer surface of the crankshaft (7) via bearings, a piston (9) is mounted on the upper portion of the outer surface of the connecting rod (8) via bearings, and a spark plug (10) is embedded in the middle portion of the top end of the cylinder head (4).

4. A novel two-stroke engine according to claim 3, characterized in that: An intake and exhaust pipeline (36) is provided in the middle of one end of the intake and exhaust valve (33), a coolant pipeline (37) is arranged inside the intake and exhaust valve (33), and an avoidance groove (38) is provided in the middle of the outer wall of the intake and exhaust valve (33).

5. A novel two-stroke engine according to claim 4, characterized in that: The intake and exhaust pipeline (36) is configured as a T-shaped structure, and the intake and exhaust pipeline (36) is communicated with the avoidance groove (38). The coolant pipeline (37) is configured as a spiral structure. Oil passages are provided inside the crankshaft (7) and inside the connecting rod (8).

6. A novel two-stroke engine according to claim 1, characterized in that: The lubricating mechanism (5) comprises an oil pump (51), a transmission shaft (52), an oil extraction pipe (53), a cooling pipe (54) and an oil cooler (55); the transmission shaft (52) is mounted at the middle of one end of the oil pump (51), and the other end of the transmission shaft (52) is mounted on one end of the crankshaft (7); the oil extraction pipe (53) is mounted at the middle of the bottom end of the oil pump (51), and the other end of the oil extraction pipe (53) is mounted at the lower part of one end of the oil pan (1); the cooling pipe (54) is mounted at the middle of the top end of the oil pump (51), and the oil cooler (55) is mounted at the middle of the outer surface of the cooling pipe (54).

7. A novel two-stroke engine according to claim 6, characterized in that: An oil filter (56) is installed at the other end of the cooling pipe (54), an oil delivery pipe (57) is installed at the middle of the top end of the oil filter (56), and two shunt pipes (58) are provided on one side of the outer surface of the oil delivery pipe (57).

8. A novel two-stroke engine according to claim 7, characterized in that: The other ends of the two diversion pipes (58) are respectively connected to the bearings at the connection between the oil pan (1) and the crankshaft (7), and the oil extraction pipe (53) is located in the bottom area of the oil pan (1).

9. A novel two-stroke engine according to claim 1, characterized in that: The cylinder cover (4) is provided with mounting holes (11) at the four corners of the top end, and mounting bolts (12) are placed inside the four mounting holes (11). The cylinder (2) is provided with mounting grooves (13) at the four corners of the top end, and a sealing groove (14) is provided in the middle of the top end of the cylinder (2). A sealing ring (15) is embedded in the middle of the bottom end of the cylinder cover (4), and a plurality of sealing sheets (16) are installed on the lower part of the outer surface of the sealing ring (15).

10. A novel two-stroke engine according to claim 9, characterized in that: The mounting hole (11) is configured as a convex structure, the sealing groove (14) and the sealing ring (15) are both configured as annular structures, and the sealing sheet (16) is configured as an annular sealing sheet in contact with the inner wall of the sealing groove (14).

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