Motorcycle single-cylinder engine cylinder arrangement structure and engine

Abstract

The utility model belongs to the technical field of motorcycle engines, and particularly discloses a motorcycle single-cylinder engine air cylinder arrangement structure and an engine, the engine comprises a clutch and an air cylinder, the air cylinder comprises an air cylinder body, an air cylinder head and an air cylinder cover which are sequentially arranged from bottom to top, and the air cylinder body extends towards the air cylinder cover along the air cylinder body. The air cylinder inclines in the direction close to the clutch. By changing the overall inclination direction of the air cylinder from forward inclination to backward inclination, the overall gravity center of the engine moves backwards, so that the overall gravity center position of the motorcycle is optimized, the motorcycle is more flexible during low-speed running and turning, the operation of the motorcycle is facilitated due to the fact that the axle load of the rear wheel is large, and the service life of the motorcycle is prolonged. And meanwhile, front wheel burden and front wheel abrasion can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycle engines, in particular to a cylinder arrangement structure of a single-cylinder motorcycle engine and the engine. Background Art

[0002] The combustion of fuel in the cylinder of a motorcycle engine generates heat energy, which is converted into mechanical energy and then drives the wheels of the motorcycle through the crankshaft to make the motorcycle move. Due to the limited space on a motorcycle, its engine has the advantages of small size and low noise.

[0003] Cylinders play a crucial role in motorcycle engine assemblies. Prior art, such as the automatic shifting engine and motorcycle disclosed in Chinese Patent No. CN220298685U, have cylinders that are tilted. This arrangement shifts the engine's center of gravity forward, shifting the motorcycle's center of gravity forward. This impacts the motorcycle's maneuverability, particularly at low speeds and during cornering. It also places increased strain on the front wheel, potentially causing it to wear faster and requiring the driver to significantly adjust their posture to control the vehicle. In light of this, the applicant has proposed a cylinder arrangement structure and engine for a single-cylinder motorcycle engine. Utility Model Content

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a cylinder arrangement structure and an engine for a single-cylinder motorcycle engine, so as to solve the problem of the engine's center of gravity being too far forward in the prior art.

[0005] To achieve the above-mentioned and other related purposes, the present invention provides a cylinder arrangement structure for a single-cylinder motorcycle engine, wherein the engine includes a clutch and a cylinder, and is characterized in that the cylinder includes a cylinder block, a cylinder head and a cylinder cover arranged in sequence from bottom to top, and along the extension direction of the cylinder block toward the cylinder head, the cylinder is inclined toward the direction close to the clutch.

[0006] Optionally, an air intake port and an exhaust port are provided on the cylinder head, the air intake port is arranged on a side of the cylinder head away from the clutch, and the exhaust port is arranged on an opposite side of the air intake port.

[0007] Optionally, an intake valve assembly and an exhaust valve assembly are provided in the cylinder head.

[0008] Optionally, the intake valve assembly includes a pair of intake valves slidably connected to the cylinder head, and the intake valves are arranged close to the intake port.

[0009] Optionally, the exhaust valve assembly includes a pair of exhaust valves slidably connected to the cylinder head, and the exhaust valves are arranged near the exhaust port.

[0010] Optionally, a piston is provided in the cylinder body, and the piston is movably provided in the cylinder body. The piston can move along the axial direction of the cylinder body, and the piston, the cylinder body and the cylinder head form a combustion chamber.

[0011] Optionally, a camshaft is provided in the cylinder head, and an intake cam and an exhaust cam are provided on the camshaft. When the camshaft rotates, it can drive the intake valve and the exhaust valve to approach the combustion chamber or move away from the combustion chamber.

[0012] Optionally, a spark plug is provided on the cylinder head, and an ignition portion of the spark plug penetrates into the cylinder head and is located in the combustion chamber.

[0013] Optionally, the angle between the cylinder and the vertical direction is -15°.

[0014] An engine comprises the above-mentioned cylinder arrangement structure of a single-cylinder motorcycle engine.

[0015] As mentioned above, the present invention proposes a single-cylinder motorcycle engine cylinder arrangement structure and engine, which has the following features:

[0016] Beneficial effects:

[0017] Compared with the prior art, the utility model changes the tilt direction of the cylinder from forward to backward, so that the overall center of gravity of the engine moves backward, thereby optimizing the overall center of gravity position of the motorcycle. The motorcycle is more flexible when traveling at low speeds and turning because the axle load of the rear wheel is larger, which helps to control the motorcycle. At the same time, it can reduce the burden on the front wheel and reduce the wear of the front wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Shown is a schematic structural diagram of an embodiment of the present utility model;

[0019] Figure 2 Shown is a schematic diagram of the back ear structure of an embodiment of the present utility model;

[0020] Figure 3 Shown is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0021] Figure 4 Shown is a cross-sectional view of an embodiment of the present invention;

[0022] Figure 5 Shown is a front view of an engine in one embodiment of the present invention.

[0023] Description of reference numerals:

[0024] Cylinder block 1, cylinder head 2, cylinder head 3, intake port 4, exhaust port 5, piston 6, intake valve 7, exhaust valve 8, camshaft 9, intake cam 10, exhaust cam 11, combustion chamber 12, spark plug 13, clutch 14. DETAILED DESCRIPTION

[0025] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0026] It should be noted that the diagrams provided in this embodiment are only used to illustrate the basic concept of the present invention. Therefore, the diagrams only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. The type, quantity and proportion of each component in actual implementation can be changed at will, and the component layout type may also be more complex. The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read. They are not used to limit the conditions for the implementation of the present invention, so they have no technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the effect and purpose that can be achieved by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should also be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0027] like Figure 1-Figure 5 As shown, the utility model proposes a cylinder arrangement structure of a single-cylinder motorcycle engine and an engine.

[0028] In an exemplary embodiment, the engine includes a clutch 14 and a cylinder, and the cylinder includes a cylinder block 1, a cylinder head 2 and a cylinder head 3 arranged in sequence from bottom to top. Along the extension direction of the cylinder block 1 to the cylinder head 3, the cylinder is inclined toward the direction close to the clutch 14.

[0029] In this embodiment, the utility model changes the overall inclination direction of the cylinder from forward inclination to backward inclination, so that the overall center of gravity of the engine moves backward, thereby optimizing the overall center of gravity position of the motorcycle. The motorcycle is more flexible when traveling at low speeds and turning because the axle load of the rear wheel is larger, which helps to control the motorcycle. At the same time, it can reduce the burden on the front wheel and reduce the wear of the front wheel.

[0030] For example, in this embodiment, the cylinder block 1 and the cylinder head 2 may be provided in an integrated manner or in a separate manner.

[0031] It is worth mentioning that Figure 5 As shown, in this embodiment, the tilt direction of the cylinder is from bottom to top, from the lower right to the upper left, wherein the clutch 14 is arranged on the left side of the cylinder.

[0032] It should also be noted that the angle between the cylinder and the vertical direction is -15°.

[0033] In an exemplary embodiment, an intake port 4 and an exhaust port 5 are provided on the cylinder head 2 . The intake port 4 is provided on a side of the cylinder head 2 away from the clutch 14 , and the exhaust port 5 is provided on an opposite side of the intake port 4 .

[0034] In this embodiment, the direction of air intake is changed from the original rear intake to the front intake. The front intake makes the intake system more direct and efficient because the air intake 4 is located at the front end of the motorcycle, which can directly draw in fresh air from the front. This also helps improve intake efficiency, especially when driving at high speeds, by utilizing the vehicle's forward momentum to increase the intake volume. Changing the original front exhaust to the rear exhaust helps reduce the exhaust system's impact on the vehicle's center of gravity distribution. Since the exhaust system is typically heavier, placing it at the rear of the vehicle helps balance the vehicle's weight distribution and improve handling stability. At the same time, the rear exhaust reduces heat radiation from the exhaust pipe to passengers and the driver, enhancing the driving experience.

[0035] Illustratively, in this embodiment, the air intake port 4 is arranged at the front side of the cylinder head 2 , and the exhaust port 5 is arranged at the rear side of the cylinder head 2 .

[0036] In an exemplary embodiment, an intake valve 7 assembly and an exhaust valve 8 assembly are provided in the cylinder head 2 .

[0037] In this embodiment, the intake valve 7 assembly is used to open the valve to allow air and energy medium to enter the combustion chamber 12, and the exhaust valve 8 assembly is used to open the combustion chamber 12 to discharge exhaust gas.

[0038] Exemplarily, the intake valve 7 assembly includes a pair of intake valves 7 slidably connected to the cylinder head 2 , and the intake valves 7 are arranged near the intake port 4 .

[0039] Exemplarily, the exhaust valve 8 assembly includes a pair of exhaust valves 8 slidably connected to the cylinder head 2 , and the exhaust valves 8 are arranged near the exhaust port 5 .

[0040] In an exemplary embodiment, a piston 6 is provided in the cylinder block 1 . The piston 6 is movably disposed in the cylinder block 1 and can move axially along the cylinder block 1 . The piston 6 , the cylinder block 1 and the cylinder head 2 form a combustion chamber 12 .

[0041] In this embodiment, the internal space of the cylinder body 1, the piston 6 and the bottom of the cylinder head 2 together form a combustion chamber 12 for compressing and burning the fuel. The piston 6 can move axially along the cylinder body 1 in the cylinder body 1, performing reciprocating motion from the top dead center to the bottom dead center and then to the top dead center.

[0042] Illustratively, a camshaft 9 is provided in the cylinder head 3 , and an intake cam 10 and an exhaust cam 11 are provided on the camshaft 9 . When the camshaft 9 rotates, it can drive the intake valve 7 and the exhaust valve 8 to approach the combustion chamber 12 or move away from the combustion chamber 12 .

[0043] Exemplarily, a spark plug 13 is provided on the cylinder head 2 , and an ignition portion of the spark plug 13 penetrates into the cylinder head 2 and is located in the combustion chamber 12 .

[0044] It is worth noting that in this embodiment, the opening and closing of the intake valve 7 and the exhaust valve 8 are mainly controlled by the timing system inside the engine. The timing system can drive the camshaft 9 to rotate, and during the rotation, the intake valve 7 and the exhaust valve 8 are driven to move back and forth close to or away from the combustion chamber 12. When the intake valve 7 moves downward and approaches the combustion chamber 12, the air and oil in the intake port 4 located on the front side of the cylinder enter the combustion chamber 12, the intake valve 7 is closed, and the piston 6 compresses the mixture in the combustion chamber 12, igniting and burning; the exhaust valve 8 moves downward and approaches the combustion chamber 12 to discharge the exhaust gas after combustion, and the above process is repeated.

[0045] The utility model also provides an engine, which includes the above-mentioned cylinder arrangement structure of the motorcycle single-cylinder engine.

[0046] In summary, the utility model changes the overall inclination direction of the cylinder from forward inclination to backward inclination, so that the overall center of gravity of the engine moves backward, thereby optimizing the overall center of gravity position of the motorcycle. The motorcycle is more flexible when traveling at low speeds and turning because the axle load of the rear wheel is larger, which helps to control the motorcycle. At the same time, it can reduce the burden on the front wheel and reduce the wear of the front wheel.

[0047] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by one of ordinary skill in the art without departing from the spirit and technical principles disclosed in the present invention are intended to be covered by the claims of the present invention.

Claims

1. A cylinder arrangement structure of a single-cylinder motorcycle engine, the engine comprising a clutch and a cylinder, characterized in that: The cylinder includes a cylinder body, a cylinder head and a cylinder cover which are sequentially arranged from bottom to top. Along the extending direction of the cylinder body toward the cylinder cover, the cylinder is inclined toward the direction close to the clutch.

2. The cylinder arrangement structure of a single-cylinder motorcycle engine according to claim 1, characterized in that: An air intake port and an exhaust port are provided on the cylinder head. The air intake port is arranged on a side of the cylinder head away from the clutch, and the exhaust port is arranged on an opposite side of the air intake port.

3. The cylinder arrangement structure of a single-cylinder motorcycle engine according to claim 2, characterized in that: An intake valve assembly and an exhaust valve assembly are arranged in the cylinder head.

4. The cylinder arrangement structure of a single-cylinder motorcycle engine according to claim 3, characterized in that: The intake valve assembly includes a pair of intake valves slidably connected to the cylinder head, and the intake valves are arranged close to the intake port.

5. The cylinder arrangement structure of a single-cylinder motorcycle engine according to claim 4, characterized in that: The exhaust valve assembly includes a pair of exhaust valves slidably connected to the cylinder head, and the exhaust valves are arranged close to the exhaust port.

6. The cylinder arrangement structure of a single-cylinder motorcycle engine according to claim 5, characterized in that: A piston is provided in the cylinder body. The piston is movably provided in the cylinder body and can move along the axial direction of the cylinder body. A combustion chamber is formed by the piston, the cylinder body and the cylinder head.

7. The cylinder arrangement structure of a single-cylinder motorcycle engine according to claim 6, characterized in that: A camshaft is provided in the cylinder head. An intake cam and an exhaust cam are provided on the camshaft. When the camshaft rotates, the intake valve and the exhaust valve can be driven to move closer to or away from the combustion chamber.

8. The cylinder arrangement structure of a single-cylinder motorcycle engine according to claim 6, characterized in that: A spark plug is provided in the cylinder head, and an ignition portion of the spark plug penetrates into the cylinder head and is located in the combustion chamber.

9. The cylinder arrangement structure of a single-cylinder motorcycle engine according to claim 1, characterized in that: The angle between the cylinder and the vertical direction is -15°.

10. An engine, characterized in that: It comprises the cylinder arrangement structure of a single-cylinder motorcycle engine as described in any one of claims 1-9.

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