Pre-pressing type two-stroke star engine

Abstract

The invention discloses a pre-pressing type two-stroke star-shaped engine, relates to the technical field of engines, and solves the problems that an existing two-stroke engine cannot be in star-shaped layout, and air supply is unstable due to the fact that multiple cylinders share a crankcase. The engine comprises a crankcase, a plurality of cylinders distributed in a star shape, a crankshaft, a piston, a connecting rod, a reciprocating compressor, a carburetor, a one-way valve and the like. When the crankshaft drives the piston to reciprocate, the reciprocating compressor is driven to operate, mixed gas prepared by the carburetor and the one-way valve is compressed by the compressor and then is fed into the crankcase, and the multiple air cylinders are fed into the crankcase through the air inlet holes and the air inlet channels, compressed, ignited and acted by the sparking plug and exhausted through the exhaust holes, and are circulated in sequence. The engine achieves two-stroke star-shaped layout, the number of the air cylinders is not limited by odd and even, the power-to-weight ratio is high, the structure is compact, air supply is stable, and the engine is suitable for scenes with high requirements for the power-to-weight ratio and the structure compactness of the engine.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engines, in particular to a pre-pressing two-stroke star engine. BACKGROUND

[0002] The structural form of the existing two-stroke engine is mostly single-cylinder single-crankcase or multi-cylinder multi-crankcase layout, which cannot realize star layout design due to the limitation of valve mechanism and air supply mode. The power of single-cylinder two-stroke engine is limited, the structure of multi-cylinder multi-crankcase two-stroke engine is loose, the power-to-weight ratio is low, and there are problems of poor cylinder coordination and unstable air supply. At present, there is no two-stroke engine with shared crankcase as the core and star-distributed multiple cylinders, which is difficult to meet the use demand for compact structure and high power-to-weight ratio of the engine. SUMMARY

[0003] Therefore, the embodiments of the present application aim to provide a pre-pressing two-stroke star engine to solve or alleviate the technical problems in the prior art, and at least provide a beneficial choice.

[0004] The technical scheme of the embodiments of the present application is implemented as follows: A pre-pressing two-stroke star engine, comprising a crankcase, a crankshaft, a plurality of cylinders, a piston, a connecting rod and a reciprocating compressor; The plurality of cylinders are distributed in a star shape on the circumferential outer side of the crankcase, and all the cylinders share the crankcase; The crankshaft transversely penetrates the crankcase and is rotationally connected with the crankcase, and each cylinder is adapted with a piston, and the piston is hinged with the crankshaft through a connecting rod; The reciprocating compressor is arranged in the axial direction of the crankcase and is drivingly connected with the crankshaft, and the displacement of the reciprocating compressor is equal to the total displacement of all the cylinders, and the exhaust end of the reciprocating compressor is in communication with the inside of the crankcase; Each cylinder is provided with an exhaust hole and a spark plug, and the crankcase is provided with an intake hole, and the intake hole is adapted with the intake port of each cylinder through an intake passage.

[0005] Preferably, the number of cylinders is multiple and is not limited by odd or even number.

[0006] Preferably, a carburetor and a one-way valve are further included, the intake end of the carburetor is in communication with external air through the one-way valve, and the exhaust end of the carburetor is in communication with the intake end of the reciprocating compressor.

[0007] Preferably, the reciprocating compressor is directly linked with the crankshaft, rotates synchronously with the crankshaft and performs reciprocating compression action.

[0008] Preferably, the intake passage is a multi-branch structure, each branch corresponds to the intake port of one cylinder to realize synchronous distribution of the mixed gas in the crankcase to multiple cylinders.

[0009] Preferably, the position of the exhaust hole and the intake passage matches the reciprocating movement stroke of the piston, when the piston moves upward, the intake passage is closed, the intake is completed to realize compression work. When the piston moves downward to a preset position, the exhaust is opened to realize exhaust, and the intake passage is opened to make the compressed combustible gas press into the cylinder to realize intake.

[0010] Preferably, the plurality of cylinders are uniformly distributed along the circumference of the crankcase, and the included angle between adjacent cylinders is equal.

[0011] Preferably, the spark plug is arranged at the top of the cylinder and located in the compression end region of the mixed gas in the cylinder, for igniting work when the mixed gas is compressed to a preset stroke.

[0012] The embodiment of the present application has the following advantages due to the adoption of the above technical solutions: I. Breakthrough in the layout limitation of two-stroke engines, first realization of star-shaped design, multiple cylinders sharing one crankcase, compact structure, and significant improvement in power-to-weight ratio.

[0013] II. Reciprocating compressor directly linked with the crankshaft, accurate matching of gas supply pressure and cylinder demand, solving the problems of gas storage and compression when multiple cylinders share a crankcase, and ensuring stable supply of mixed gas.

[0014] III. Number of cylinders not limited by odd or even, suitable for different power requirements, and simple transmission structure, reducing the synchronization error caused by multiple crankcases, and higher working efficiency.

[0015] IV. Inheritance of the advantages of simple structure and rapid response of two-stroke engines, while having the space utilization advantage of star-shaped layout, wider application range.

[0016] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features will be readily apparent to those skilled in the art by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0018] Fig. 1 is a structural diagram of the present application; Fig. 2 is a structural diagram of another perspective of the present application.

[0019] Reference numerals: 1, crankcase; 2, piston; 3, connecting rod; 4, cylinder; 5, crankshaft; 6, intake hole; 8, spark plug; 10, intake port; 11, one-way valve; 12, exhaust hole. DETAILED DESCRIPTION

[0020] Hereinafter, only certain exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0021] It should be noted that the terms "first", "second", "symmetric", "array" and the like are only used for distinguishing description and position description purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "symmetric" and the like can explicitly or implicitly include one or more of the features; similarly, for some features that are not limited in number by the words "two", "three" and the like, it should be noted that the features also belong to explicitly or implicitly including one or more feature numbers. In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "fixing" and the like should be understood broadly; for example, it can be fixed connection, or detachable connection, or one-piece; it can be mechanical connection, it can be direct connection, it can be welding, it can be indirect connection through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the description and drawings in combination with specific circumstances.

[0022] The embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0023] As Figs. 1-2 shown, the present application provides a pre-press two-stroke star engine, which comprises a crankcase mixture 1, a crankshaft mixture 5, a plurality of cylinder mixtures 4, a piston mixture 2, a connecting rod mixture 3 mixture and a reciprocating compressor; The engine breaks through the structural limitation of traditional two-stroke engine single cylinder or multi-cylinder multi-crankcase through innovative star layout design, providing a new configuration for the compactness and high efficiency of power system. The plurality of cylinder mixtures 4 are distributed in a star-shaped manner on the circumferential outside of the crankcase mixture 1, and all the cylinder mixtures 4 share the crankcase mixture 1. This shared crankcase design greatly reduces the structural redundancy of the engine, making the overall layout more compact and laying a structural foundation for improving the power-to-weight ratio.

[0024] The crankshaft mixed gas 5 is mixed with the crankcase mixed gas 1 and is rotationally connected with the crankcase mixed gas 1, and each cylinder mixed gas 4 is fitted with a piston mixed gas 2, which is articulated with the crankshaft mixed gas 5 through a connecting rod mixed gas 3; The classic transmission cooperation of the piston, the crankshaft and the connecting rod, combined with the star-shaped cylinder layout, can realize synchronous and balanced power output of multiple cylinders, avoiding power coordination errors of multiple crankcases. The reciprocating compressor is arranged in the axial direction of the crankcase mixed gas 1 and is transmissionally connected with the crankshaft mixed gas 5. The exhaust capacity of the reciprocating compressor is equal to the total exhaust capacity of all cylinder mixed gases 4, and the exhaust end thereof is in communication with the inside of the crankcase mixed gas 1. By accurately matching the exhaust capacity of the compressor with the total exhaust capacity of the cylinders, it can ensure that the mixed gas pressure in the crankcase is always stable, completely solving the problem of insufficient gas supply or pressure fluctuation when multiple cylinders share a crankcase, and ensuring the uniformity and stability of the intake of each cylinder.

[0025] Each cylinder mixed gas 4 is provided with an exhaust hole 12 and a spark plug 8, and the crankcase mixed gas 1 is provided with an intake hole 6, which is adapted to the intake port of each cylinder mixed gas 4 through an intake passage 10. The coordinated design of the intake hole, the intake passage and the exhaust hole, combined with the two-stroke working cycle, enables efficient connection of the intake and exhaust processes of each cylinder, improving the gas exchange efficiency. The number of cylinder mixed gases 4 is multiple and is not limited by the odd or even number. This design breaks through the limitation of the odd or even number of cylinders in traditional engines and can flexibly configure the number of cylinders according to the actual power demand, adapting to different application scenarios from low power to high power and having strong scene adaptability. It also includes a carburetor 8 and a one-way valve 11. The intake end of the carburetor 8 is in communication with the external air through the one-way valve 11, and the exhaust end of the carburetor 8 is in communication with the intake end of the reciprocating compressor; The cooperation of the carburetor and the one-way valve can stably prepare combustible mixed gas, and the one-way valve effectively prevents backflow of the mixed gas, ensuring the one-way nature and stability of the preparation and delivery of the mixed gas, and providing a high-quality source of mixed gas for reliable combustion of the engine.

[0026] In this embodiment, specifically, the reciprocating compressor is directly linked with the crankshaft mixed gas 5, rotates synchronously with the crankshaft mixed gas 5 and performs reciprocating compression action; This direct linkage mode, saves additional transmission components, not only reduces energy loss, but also simplifies the structure, improves transmission efficiency, makes the compression process and the crankshaft operation highly synchronized, and guarantees the timeliness of the mixed gas supply. The design of the multi-branch intake port can ensure that each cylinder can synchronously obtain uniform mixed gas, avoid the intake difference between cylinders, make the working process of each cylinder highly consistent, and further improve the power output smoothness of the engine. The uniform circumferential distribution makes the center of gravity of the engine closer to the center of the crankshaft, greatly improves the dynamic balance performance of the whole machine, reduces the vibration during operation, and improves the operation stability and service life of the engine. The spark plug mixed gas 8 is arranged at the top of the cylinder mixed gas 4 and located in the compression end region of the mixed gas in the cylinder mixed gas 4, and is used for igniting work when the mixed gas is compressed to a preset stroke; The precise layout of the spark plug ensures that the mixed gas is ignited when it is compressed to the optimal combustion state, so that the mixed gas burns more fully, improves the thermal efficiency, reduces harmful emissions, and realizes the balance between power and environmental protection.

[0027] When the present application works: When starting operation, first make the crankshaft 5 rotate, the crankshaft 5 drives the articulated connecting rod 3 and the piston 2 to reciprocate in the cylinder 4, and drives the reciprocating compressor in the crankcase 1 to rotate synchronously; In the preparation of mixed gas stage, the external air enters the carburetor 8 through the one-way valve 11, mixes with the fuel to form a combustible mixture, and the reciprocating compressor continuously discharges the mixed gas into the crankcase 1 after compression. Because the displacement of the compressor is equal to the total displacement of all cylinders 4, the stable gas supply pressure is maintained in the crankcase 1; During the exhaust and intake process, when the piston 2 moves downward to the preset position, the exhaust port 12 opens to realize exhaust, and at the same time, the intake passage 10 opens synchronously. The compressed combustible gas in the crankcase 1 is forced into the cylinder 4 through the intake port 6 and the multi-branch intake passage 10 to complete the intake action. During the compression and power stroke process, piston 2 moves upward and intake port 10 is closed. After the intake is completed, the combustible gas in cylinder 4 is compressed. When the compression reaches the preset stroke, spark plug 8 ignites, and the combustible gas burns and expands, pushing piston 2 downward. This drives crankshaft 5 to rotate and output power through connecting rod 3. In summary, for each rotation of crankshaft 5, the star-shaped cylinders 4 sequentially complete the working cycle of "exhaust + intake → compression and power stroke". This device adjusts the piston stroke and the coordination logic of the intake and exhaust components to synchronize the exhaust and intake, and efficiently link compression and power, further optimizing the operating efficiency of the two-stroke cycle. At the same time, it solves the problem of air supply for multiple cylinders 4 sharing the crankcase 1, ensuring uniform and stable air intake for each cylinder 4. The star-shaped cylinder layout is not limited by the number of odd or even cylinders. Multiple cylinders work in sequence, which significantly improves the power-to-weight ratio and structural compactness. The power output is more continuous and smooth, making it suitable for scenarios with high requirements for engine power-to-weight ratio and compactness.

[0028] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in the present invention, and these should all be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A pre-compressed two-stroke radial engine, characterized in that, It includes a crankcase (1), a crankshaft (5), multiple cylinders (4), a piston (2), a connecting rod (3), and a reciprocating compressor; The plurality of cylinders (4) are distributed in a star shape on the circumferential outer side of the crankcase (1), and all cylinders (4) share the crankcase (1); The crankshaft (5) passes through the crankcase (1) laterally and is rotatably connected to the crankcase (1). Each cylinder (4) is equipped with a piston (2), and the piston (2) is hinged to the crankshaft (5) through the connecting rod (3). The reciprocating compressor is located on the axial side of the crankcase (1) and is connected to the crankshaft (5) in a drive. The exhaust volume of the reciprocating compressor is equal to the total exhaust volume of all cylinders (4), and its exhaust end is connected to the inside of the crankcase (1). Each cylinder (4) is provided with an exhaust port (12) and a spark plug (8), and the crankcase (1) is provided with an intake port (6), which is adapted to the intake port of each cylinder (4) through an intake passage (10).

2. The pre-compressed two-stroke radial engine according to claim 1, characterized in that: The number of cylinders (4) is multiple and is not limited by odd or even numbers.

3. The pre-compressed two-stroke radial engine according to claim 1, characterized in that: It also includes a carburetor (8) and a one-way valve (11). The air inlet of the carburetor (8) is connected to the outside air through the one-way valve (11), and the air outlet of the carburetor (8) is connected to the air inlet of the reciprocating compressor.

4. A pre-compressed two-stroke radial engine according to claim 1, characterized in that: The reciprocating compressor is directly linked to the crankshaft (5), and rotates synchronously with the crankshaft (5) to perform reciprocating compression.

5. A pre-compressed two-stroke radial engine according to claim 1, characterized in that: The intake manifold (10) has a multi-branch structure, with each branch corresponding to the intake port of a cylinder (4), thereby realizing the synchronous distribution of the air-fuel mixture in the crankcase (1) to multiple cylinders (4).

6. A pre-compressed two-stroke radial engine according to claim 1, characterized in that: The positions of the exhaust port (12) and the intake port (10) are matched with the reciprocating stroke of the piston (2). When the piston (2) moves upward, the intake port (10) closes, and the intake ends to achieve compression and work. When the piston (2) moves downward to the preset position, the exhaust port (9) opens to achieve exhaust, and at the same time, the intake port (10) opens to force the compressed combustible gas into the cylinder to achieve intake.

7. A pre-compressed two-stroke radial engine according to claim 1, characterized in that: The plurality of cylinders (4) are evenly distributed around the crankcase (1), and the included angle between adjacent cylinders (4) is equal.

8. A pre-compressed two-stroke radial engine according to claim 1, characterized in that: The spark plug (8) is located at the top of the cylinder (4) and in the compression end region of the gas mixture inside the cylinder (4), and is used to ignite and perform work when the gas mixture is compressed to a preset stroke.

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