CN213392389U

CN213392389U - Novel two-stroke engine

Info

Publication number: CN213392389U
Application number: CN202022390939.7U
Authority: CN
Inventors: 苏毅博
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-06-08
Anticipated expiration: 2030-10-23

Abstract

The application discloses a novel two-stroke engine, which comprises a casing, a crankshaft, a piston and a connecting rod with the length capable of being adjusted in a telescopic mode, wherein the casing comprises a crankcase and a cylinder, an air inlet, an air outlet and a limiting structure are arranged on the side wall of the cylinder, when the piston acts with the limiting structure, the air inlet and the air outlet are located above the piston, an opening and closing mechanism is arranged at the air inlet and the air outlet, and the sum of the distance between the upper end of the connecting rod and a crankshaft main shaft and the length of a crankshaft crank is smaller than; the rotation process of the crankshaft includes a first process of making the piston approach the limit structure downward, a second process of making the piston stay at the limit structure, and a third process of making the piston move away from the limit structure upward. So set up, when the bent axle is in the second in-process, through opening and closing of independent control air inlet and gas vent, make the exhaust process and the process of breathing in go on alone, each other does not influence, can avoid the combustible mixture who newly gets into the cylinder directly to discharge from the gas vent, avoids the fuel loss, reduces and discharges the pollution.

Description

Novel two-stroke engine

Technical Field

The utility model relates to the technical field of engines, especially, relate to a novel two-stroke engine.

Background

The two-stroke engine completes one working cycle in two strokes, and the crankshaft rotates one circle to do work once. The cylinder block of a two-stroke engine is provided with three ports, an inlet port, an exhaust port and a transfer port, which are closed by pistons at certain times. When the piston moves upwards from the lower dead point, the air inlet hole, the exhaust hole and the scavenging hole are closed simultaneously, the mixed gas entering the cylinder is compressed, the air inlet hole can be gradually exposed below the piston along with the upward movement of the piston, and when the air inlet hole is exposed, the combustible mixed gas can enter the crankcase. When the piston moves to the vicinity of the top dead center, the spark plug ignites the combustible mixed gas, the combustible mixed gas expands to push the piston to move downwards to do work, the air inlet is closed, and the combustible mixed gas sealed in the crankcase is compressed; when the piston moves to be close to the bottom dead center, the exhaust hole is gradually exposed above the piston, and when the exhaust hole is exposed, the exhaust gas is flushed out of the cylinder; then the air vent is exposed above the piston, the combustible mixture pre-pressed in the crankcase is flushed into the cylinder to expel waste gas, and the air exchange process is carried out. In the process of air exchange, part of combustible mixed gas newly entering the cylinder can be directly discharged through the exhaust hole, so that fuel loss is caused, the fuel consumption rate of the two-stroke engine is increased, and meanwhile, emission pollution is caused.

Therefore, how to solve the problems of fuel loss and emission pollution caused by the exhaust hole and the scavenging hole being simultaneously opened during scavenging of the two-stroke engine in the prior art becomes an important technical problem to be solved by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the related art at least to a certain extent, the present application provides a novel two-stroke engine, which can solve the problems of fuel loss and emission pollution caused by the fact that an exhaust hole and a scavenging hole are simultaneously in an open state when the two-stroke engine in the prior art is scavenging.

The utility model discloses a realize like this: a novel two-stroke engine comprises a casing, a crankshaft, a piston and a connecting rod with the length capable of being adjusted in a telescopic mode, wherein the casing comprises a crankcase and a cylinder arranged above the crankcase, the piston is arranged in the cylinder in a vertically movable mode, the crankshaft is arranged in the crankcase in a fixed-shaft rotating mode, two ends of the connecting rod are respectively in rotating connection with the lower end of the piston and a connecting rod shaft neck of the crankshaft, a rotating axis is parallel to a rotating axis of the crankshaft, an air inlet, an air outlet and a limiting structure used for limiting the piston to move downwards are arranged on the side wall of the cylinder, when the piston moves to act on the limiting structure, the sum of the distance between the upper end of the connecting rod and a crankshaft main shaft and the length of the crankshaft crank is smaller than or equal to the maximum length of the connecting rod, and the air inlet and the air outlet are located above the, the air inlet and the air outlet are both provided with an opening and closing mechanism; the rotation process of the crankshaft comprises a first process of enabling the piston to be close to the limiting structure downwards, a second process of enabling the piston to stay at the limiting structure and a third process of enabling the piston to be far away from the limiting structure upwards, the rotation angle of the crankshaft in the first process is smaller than 180 degrees, and the rotation angle of the crankshaft in the third process is smaller than 180 degrees.

Preferably, the rotation angle of the crankshaft in the first process is the same as the rotation angle of the crankshaft in the second process.

Preferably, the limiting structure is a limiting ring arranged on the inner side wall of the cylinder, and the inner diameter of the limiting ring is smaller than the diameter of the piston.

Preferably, the connecting rod comprises a first rod piece and a second rod piece which are coaxially arranged, the upper end of the first rod piece is rotatably connected with the piston, the lower end of the second rod piece is rotatably connected with a connecting rod journal of the crankshaft, and a sliding rail structure is arranged between the first rod piece and the second rod piece, so that the first rod piece can move relative to the second rod piece along the length direction of the second rod piece.

Preferably, an air inlet channel communicated with the air inlet and an air outlet channel communicated with the air outlet extend out of the cylinder, and a pressurization system is arranged in each of the air inlet channel and the air outlet channel.

Preferably, the supercharging system comprises a fan and a first motor for driving the fan to rotate.

Preferably, the opening and closing mechanism includes a fixed block disposed outside the cylinder, a valve reciprocally movable in a radial direction of the cylinder with respect to the fixed block, and a drive transmission assembly for driving the valve to move, and the moving position of the valve includes a first position at which the exhaust port or the intake port is in an open state and a second position at which the exhaust port or the intake port is in a closed state.

Preferably, the axis of the valve is arranged along the horizontal direction, the driving transmission assembly comprises a cam capable of rotating in a fixed shaft mode and a second motor driving the cam to rotate, the rotating axis of the cam is perpendicular to the axis of the valve, and a reset assembly is arranged between the valve and the fixed block.

Preferably, the reset assembly comprises a coil spring coaxially arranged with the valve, the coil spring is sleeved outside the valve, one end of the coil spring is fixedly connected with the fixed block, and the other end of the coil spring is fixedly connected with the valve.

Preferably, a pressing block is arranged between the valve and the cam, the pressing block is fixedly connected with the tail of the valve, and one side of the pressing block, which is close to the cam, is an arc surface.

The technical scheme provided by the application comprises the following beneficial effects:

the application provides a novel two-stroke engine, including casing, bent axle, piston and connecting rod, wherein, the casing includes crankcase and cylinder, and the cylinder setting is in the top of crankcase, links together with the crankcase. The piston can move up and down in the cylinder, and the crankshaft can be fixed-shaft rotated in the crankcase. The connecting rod sets up between piston and bent axle, and the both ends of connecting rod rotate with the lower extreme of piston and the connecting rod journal of bent axle respectively and be connected, relative pivoted axis of rotation between connecting rod and the piston is parallel with relative pivoted axis of rotation between connecting rod and the bent axle, be provided with the air inlet on the lateral wall of cylinder, gas vent and limit structure, when the piston moves down to limit structure position department, limit structure and piston interact, in order to restrict the piston and continue downstream, at this moment, air inlet and gas vent all are located the top of piston, air inlet and gas vent position department all are provided with closing mechanism, can open and close of independent control air inlet and gas vent through closing mechanism. The rotation process of the crankshaft comprises a first process of enabling the piston to be close to the limiting structure downwards, a second process of enabling the piston to stay at the limiting structure and a third process of enabling the piston to be far away from the limiting structure upwards, wherein the rotation angle of the crankshaft in the first process is smaller than 180 degrees, and the rotation angle of the crankshaft in the third process is smaller than 180 degrees. The length of the connecting rod can be telescopically adjusted, and when the crankshaft is in the second process, the sum of the distance between the upper end of the connecting rod and the crankshaft main shaft and the length of the crankshaft crank is smaller than or equal to the maximum length of the connecting rod, so that the crankshaft can rotate by 360 degrees. When the piston moves downwards, the space above the piston is increased and can correspond to a working process, and at the moment, the air inlet and the air outlet are required to be in a closed state; when the crankshaft is in the second process, the position of the piston is unchanged, the air inlet and the air outlet are both positioned above the piston, in the process, the air outlet can be opened firstly to perform the air outlet process, after the air outlet is finished, the air outlet is closed, then the air inlet is opened to perform the air suction process; when the crankshaft is in the third process, the connecting rod is in the shortest length state, the crankshaft rotates to drive the piston to move upwards, the space above the piston is reduced, the compression process can be corresponded, and at the moment, the air inlet and the air outlet are both in the closed state. The piston reciprocates once to complete one work doing, exhausting, inhaling and compressing process, and this completes one work cycle in two strokes of the piston. So set up, when the bent axle is in the second in-process, through opening and closing of independent control air inlet and gas vent, make the exhaust process go on alone with the process of breathing in, each other does not influence, can avoid the combustible mixture who newly gets into the cylinder directly to discharge from the gas vent, has avoided the fuel loss to two-stroke engine's fuel consumption rate has been reduced, has reduced emission pollution.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a two-stroke engine according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a two-cycle engine shown in an embodiment of the present invention beginning to exhaust;

FIG. 3 is a schematic diagram of a two-cycle engine according to an embodiment of the present invention shown in a configuration at the beginning of intake;

fig. 4 is a schematic diagram of a two-stroke engine according to an embodiment of the present invention at the start of compression.

Reference numerals:

1. a crankshaft; 2. a piston; 3. a connecting rod; 4. a crankcase; 5. a cylinder; 6. an air inlet; 7. an exhaust port; 8. a limiting structure; 9. an air intake passage; 10. an exhaust passage; 11. a pressurization system; 12. a fixed block; 13. an air valve; 14. a cam; 15. a coil spring; 16. and (7) briquetting.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The present embodiment aims to provide a novel two-stroke engine, which solves the problems of fuel loss and emission pollution caused by the fact that an exhaust hole and a scavenging hole are simultaneously in an open state when the two-stroke engine in the prior art is scavenging.

Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.

Referring to FIGS. 1-4, schematic structural views of a novel two-stroke engine in some exemplary embodiments are shown. The novel two-stroke engine provided by the embodiment comprises a shell, a crankshaft 1, a piston 2 and a connecting rod 3, wherein the shell comprises a crankcase 4 and a cylinder 5, an ignition mechanism is arranged at the upper end of the cylinder 5, and the cylinder 5 is arranged above the crankcase 4 and connected with the crankcase 4. The piston 2 is movable up and down in the cylinder 5, and the crankshaft 1 is rotatable in the crankcase 4. Connecting rod 3 sets up between piston 2 and bent axle 1, and the both ends of connecting rod 3 rotate with the lower extreme of piston 2 and the connecting rod journal of bent axle 1 respectively and be connected, the axis of rotation of relative rotation between connecting rod 3 and the piston 2 is parallel with the axis of rotation of relative rotation between connecting rod 3 and the bent axle 1, be provided with air inlet 6 on the lateral wall of cylinder 5, gas vent 7 and limit structure 8, when piston 2 moves down to limit structure 8 position department, limit structure 8 and piston 2 interact, in order to restrict piston 2 and continue the downward movement, at this moment, air inlet 6 and gas vent 7 all are located the top of piston 2, air inlet 6 and gas vent 7 position department all are provided with closing mechanism, can open and close of independent control air inlet 6 and gas vent 7 through closing mechanism.

The rotation process of the crankshaft 1 includes a first process of making the piston 2 approach the limit structure 8 downward, a second process of making the piston 2 stay at the limit structure 8, and a third process of making the piston 2 move away from the limit structure 8 upward, the rotation angle of the crankshaft 1 in the first process is less than 180 degrees, and the rotation angle of the crankshaft 1 in the third process is less than 180 degrees. The length of the connecting rod 3 can be telescopically adjusted, and when the crankshaft 1 is in the second process, the sum of the distance between the upper end of the connecting rod 3 and the main shaft of the crankshaft 1 and the length of the crank of the crankshaft 1 is less than or equal to the maximum length of the connecting rod 3, so that the crankshaft 1 can rotate by 360 degrees.

When the piston 2 moves downwards, the space above the piston 2 is increased, and the working process can be performed correspondingly, at this time, the air inlet 6 and the air outlet 7 are both required to be in a closed state, in the process, the connecting rod 3 is in a state of shortest length, the piston 2 has downward pressure on the connecting rod 3, and the connecting rod journal of the crankshaft 1 is also subjected to downward pressure, so that the crankshaft 1 is driven to rotate, namely, the first process of the crankshaft 1 is shown in fig. 1-2; when the crankshaft 1 is in the second process, the position of the piston 2 is unchanged, the air inlet 6 and the air outlet 7 are both positioned above the piston 2, in the process, the air outlet 7 can be opened first to perform an air exhaust process, after the air exhaust process is finished, the air outlet 7 is closed, then the air inlet 6 is opened to perform an air suction process, in the process, the rotation of the crankshaft 1 can change the distance between the connecting rod journal of the crankshaft 1 and the piston 2, the length of the connecting rod 3 can be freely adjusted in a telescopic mode to just adapt to the change of the distance, and reference is made to fig. 2-4; when the crankshaft 1 is in the third process, the connecting rod 3 is in the shortest length state, the rotation of the crankshaft 1 drives the piston 2 to move upwards, the space above the piston 2 is reduced, the compression process can be corresponded, and at this time, the air inlet 6 and the air outlet 7 are both in the closed state. The piston 2 reciprocates once to complete one working, exhausting, inhaling and compressing process, i.e. one working cycle is completed in two strokes of the piston 2.

So set up, when bent axle 1 was in the second in-process, through opening and closing of independent control air inlet 6 and gas vent 7, make the exhaust process go on alone with the process of breathing in, each other does not influence, can avoid newly getting into the combustible mixture of cylinder 5 and directly discharge from gas vent 7, has avoided the fuel loss to the fuel consumption rate of two-stroke engine has been reduced, has reduced emission pollution.

It should be noted that, the crankshaft 1 is rotationally connected to the crankcase 4, two ends of the crankshaft 1 extend to the outside of the crankcase 4, and one end of the crankshaft 1 is provided with a flywheel, a starter, and the like, which are prior art and are not described in detail in this application.

In practice, the rotation angle of the crankshaft 1 in the first process is the same as the rotation angle of the crankshaft 1 in the third process, the rotation angle of the crankshaft 1 in the second process corresponding to the exhaust process is the same as the rotation angle corresponding to the intake process, and when the crankshaft 1 rotates to the point where the connecting rod journal of the crankshaft 1 is located at the lowest point, that is, the crankshaft 1 rotates to the position where the axis of the connecting rod 3 coincides with the vertical line, the exhaust process ends and the intake process begins.

In this embodiment, above-mentioned limit structure 8 is the spacing ring that sets up on the 5 inside walls of cylinder, and the spacing ring is located the lower extreme of 5 inside walls of cylinder, and the axis of spacing ring and the coincidence of the axis of cylinder 5, and the internal diameter of spacing ring is less than the diameter of piston 2, and when piston 2 removed to limit structure 8 position department, spacing ring upper surface and 2 lower surfaces of piston interact to restriction piston 2's removal.

In implementation, the connecting rod 3 can be freely stretched and retracted, and specifically comprises a first rod piece and a second rod piece which are distributed up and down, wherein the first rod piece and the second rod piece are coaxially arranged. The upper end of the first rod piece is rotationally connected with the piston 2, the lower end of the second rod piece is rotationally connected with a connecting rod journal of the crankshaft 1, a sliding rail structure is arranged between the first rod piece and the second rod piece, so that the second rod piece can move relative to the first rod piece along the length direction of the first rod piece, and the overall length of the connecting rod 3 can be adjusted by enabling the first rod piece and the second rod piece to move relatively. The sliding rail structure comprises a sliding groove arranged on the first rod piece, the extending direction of the sliding groove is consistent with the length direction of the first rod piece, and the upper end of the second rod piece can extend into the sliding groove and can reciprocate along the length direction of the sliding groove. The lower extreme of first member is provided with first stopper, the upper end of second member is provided with the second stopper, first stopper is located the lateral wall of spout, when the upper end of first member and the lower extreme of second member kept away from each other to the maximum distance, even the upper end of second member moves to the lower extreme of first member, the first stopper of first member lower extreme also can interact with the second stopper of second member upper end, make the removal of first stopper restriction second stopper, thereby prevent that the second member from deviating from in the spout.

In the implementation, an intake passage 9 communicated with the intake port 6 and an exhaust passage 10 communicated with the exhaust port 7 are extended outside the cylinder 5, and a pressurization system 11 is arranged in each of the intake passage 9 and the exhaust passage 10 to ensure the smooth proceeding of the intake process and the exhaust process.

The supercharging system 11 located in the intake passage 9 and the supercharging system 11 located in the exhaust passage 10 may be a mechanical supercharging system, a gas wave supercharging system, an electric turbocharging system or a compound supercharging system, and may be specifically selected according to the use scenario of the engine. The charging system 11 located in the intake channel 9 may also be an exhaust gas turbocharging system. The above-mentioned mechanical supercharging system, the gas wave supercharging system, the electric turbocharging system, the compound supercharging system or the exhaust gas turbocharging system are mature prior arts, and are not described herein again.

In implementation, the supercharging system 11 located in the intake passage 9 and the supercharging system located in the exhaust passage 10 may be both provided in the form of a fan, and specifically include a fan and a first motor for driving the fan to rotate, and through rotation of the fan, an air flow is formed, so that intake efficiency and exhaust efficiency of the air cylinder 5 are improved. Alternatively, the fan may be connected to the crankshaft 1 by a transmission mechanism, and the fan may be driven by the rotation of the crankshaft 1.

In this embodiment, the opening and closing mechanism provided in the intake port 6 and the opening and closing mechanism provided in the exhaust port 7 have the same structure, and each of the opening and closing mechanisms includes a fixed block 12, a valve 13, and a drive transmission assembly, the fixed block 12 is provided outside the cylinder 5 and is configured to support the valve 13, the valve 13 is capable of reciprocating relative to the fixed block 12 along the radial direction of the cylinder 5, the moving position of the valve 13 includes a first position at which the exhaust port 7 or the intake port 6 is in an open state and a second position at which the exhaust port 7 or the intake port 6 is in a closed state, when the head of the valve 13 moves to the position of the intake port 6 or the exhaust port 7, the intake port 6 or the exhaust port 7 is in a closed state, and when the head of the valve 13.

In implementation, the axis of the valve 13 may be arranged in a horizontal direction, the driving transmission assembly is used for driving the valve 13 to move, and specifically includes a cam 14 capable of rotating in a fixed axis manner and a second motor driving the cam 14 to rotate, the rotation axis of the cam 14 is perpendicular to the axis of the valve 13, the tail of the valve 13 contacts with the arc surface of the cam 14, the contact position of the tail of the valve 13 and the cam 14 is different, and the distance between the tail of the valve 13 and the rotation axis of the cam 14 is different, so that the rotation of the cam 14 drives the valve 13 to move. In order to ensure that the valve 13 is always contacted with the cambered surface of the cam 14, a resetting component is arranged between the valve 13 and the fixed block 12.

In implementation, the reset assembly includes a coil spring 15, and the coil spring 15 is disposed coaxially with the valve 13 and sleeved outside the valve 13. The coil spring 15 may be an extension spring, one end of which is fixedly connected to the fixed block 12, and the other end of which is fixedly connected to the valve 13.

In implementation, a pressing block 16 is arranged between the valve 13 and the cam 14, the pressing block 16 is fixedly connected with the tail of the valve 13, one side of the pressing block 16, which is close to the cam 14, is an arc surface, the circle center corresponding to the arc surface is located on the rotation axis of the cam 14, and the arrangement of the arc surface on the pressing block 16 is beneficial to accurately controlling the opening time of the valve 13 and is beneficial to ensuring the stable opening degree of the air inlet 6 and the air outlet 7. The length of the cambered surface on the pressing block 16 is related to the opening time of the air inlet 6 and the air outlet 7, and is set according to the requirement.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A novel two-stroke engine is characterized by comprising a shell, a crankshaft (1), a piston (2) and a connecting rod (3) with the length capable of being telescopically adjusted,

the machine shell comprises a crankcase (4) and a cylinder (5) arranged above the crankcase (4), the piston (2) can be arranged in the cylinder (5) in a vertically moving mode, the crankshaft (1) can be arranged in the crankcase (4) in a fixed-shaft rotating mode, two ends of the connecting rod (3) are respectively in rotating connection with the lower end of the piston (2) and a connecting rod journal of the crankshaft (1), a rotating axis is parallel to the rotating axis of the crankshaft (1), an air inlet (6), an air outlet (7) and a limiting structure (8) used for limiting the piston (2) to move downwards are arranged on the side wall of the cylinder (5), when the piston (2) moves to act with the limiting structure (8), the sum of the distance between the upper end of the connecting rod (3) and the main shaft of the crankshaft (1) and the length of a crank of the crankshaft (1) is smaller than or equal to the maximum length of the connecting rod (3), the air inlet (6) and the air outlet (7) are positioned above the piston (2), and the air inlet (6) and the air outlet (7) are both provided with an opening and closing mechanism;

the rotation process of the crankshaft (1) comprises a first process of enabling the piston (2) to be close to the limiting structure (8) downwards, a second process of enabling the piston (2) to stay at the limiting structure (8) and a third process of enabling the piston (2) to be far away from the limiting structure (8) upwards, the rotation angle of the crankshaft (1) in the first process is smaller than 180 degrees, and the rotation angle of the crankshaft (1) in the third process is smaller than 180 degrees.

2. A new two-stroke engine according to claim 1, characterized in that the angle of rotation of the crankshaft (1) in the first process is the same as the angle of rotation of the crankshaft (1) in the second process.

3. A new two-stroke engine according to claim 1, characterized in that the stop structure (8) is a stop ring arranged on the inner side wall of the cylinder (5), the inner diameter of the stop ring being smaller than the diameter of the piston (2).

4. A new type of two-stroke engine according to claim 1, characterized in that the connecting rod (3) comprises a first rod and a second rod coaxially arranged, the upper end of the first rod is rotationally connected with the piston (2), the lower end of the second rod is rotationally connected with the connecting rod journal of the crankshaft (1), and a slide rail structure is arranged between the first rod and the second rod, so that the first rod can move relative to the second rod along the length direction of the second rod.

5. A new type of two-stroke engine according to claim 1, characterized in that the cylinder (5) is externally extended with an intake channel (9) communicating with the intake port (6) and an exhaust channel (10) communicating with the exhaust port (7), and a supercharging system (11) is arranged in both the intake channel (9) and the exhaust channel (10).

6. A new two-stroke engine according to claim 5, characterized in that the supercharging system (11) comprises a fan and a first electric machine for driving the fan in rotation.

7. A new type of two-stroke engine according to claim 1, characterized in that the opening and closing mechanism comprises a fixed block (12) arranged outside the cylinder (5), a valve (13) reciprocally movable in the radial direction of the cylinder (5) with respect to the fixed block (12) and a drive transmission assembly for driving the valve (13) to move, the moving position of the valve (13) comprising a first position in which the exhaust port (7) or the intake port (6) is in an open state and a second position in which the exhaust port (7) or the intake port (6) is in a closed state.

8. The novel two-stroke engine according to claim 7, characterized in that the axis of the valve (13) is arranged in a horizontal direction, the driving transmission assembly comprises a cam (14) capable of rotating in a fixed shaft mode and a second motor for driving the cam (14) to rotate, the rotating axis of the cam (14) is perpendicular to the axis of the valve (13), and a resetting assembly is arranged between the valve (13) and the fixed block (12).

9. The novel two-stroke engine according to claim 8, wherein the reset assembly comprises a coil spring (15) coaxially arranged with the valve (13), the coil spring (15) is sleeved outside the valve (13), one end of the coil spring (15) is fixedly connected with the fixed block (12), and the other end of the coil spring is fixedly connected with the valve (13).

10. The novel two-stroke engine according to claim 8, characterized in that a pressing block (16) is arranged between the valve (13) and the cam (14), the pressing block (16) is fixedly connected with the tail part of the valve (13), and one side of the pressing block (16) close to the cam (14) is an arc surface.