Engine and motorcycles using the engine

Abstract

This application discloses an engine and a motorcycle using the engine. The engine includes a housing, a crankshaft, and an intake mechanism. The housing includes a crankcase and a cylinder head. The cylinder head forms an intake passage, and the intake mechanism includes an intake pipe communicating with the intake passage. The cylinder head has a mounting surface, and the port of the intake passage is located on the mounting surface. At least two intake passages and mounting surfaces are provided, with each intake passage corresponding to one mounting surface. The cylinder head has a fixing part for fixing the intake pipe and communicating with the port of the intake passage. The fixing part is located between two adjacent intake passages. The outer wall of the cylinder head and the fixing part together form a groove. A drain groove is formed on the cylinder head, and the upper end of the drain groove communicates with the groove. A gap exists between the bottom of the drain groove and the mounting surface along a direction perpendicular to the mounting surface. These features can improve the service life of the engine.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to an engine and a motorcycle using the engine. Background Technology

[0002] Motorcycles are vehicles that are steered by using handlebars to turn the front wheel. They are lightweight, agile, and fast, and are widely used in patrol, passenger and freight transportation, and other fields.

[0003] A motorcycle typically consists of a frame, body panels, running gear, suspension system, seat, electrical system, and engine. The engine includes a cylinder head, which has intake manifolds for air intake. However, because the protruding structures on the cylinder head, such as the intake manifolds, form grooves, rainwater and other liquids can accumulate in these grooves during rain or riding. If this liquid is not drained, it can overflow into the intake manifolds, causing the air supplied to the engine to contain moisture, leading to engine damage and reduced engine lifespan. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of this application is to provide an engine and a motorcycle using the engine, the engine having a long service life.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] An engine includes a housing, a crankshaft, and an intake mechanism. The housing includes a crankcase and a cylinder head, the cylinder head forming an intake passage. The crankshaft is located within the crankcase and rotatably connected to it. The intake mechanism includes an intake pipe communicating with the intake passage. The cylinder head has a mounting surface, and the port of the intake passage is located on the mounting surface. At least two intake passages and mounting surfaces are provided, with each intake passage corresponding to one mounting surface. The cylinder head has a fixing part for fixing the intake pipe and communicating with the port of the intake passage; the fixing part is located between two adjacent intake passages. The outer wall of the cylinder head and the fixing part together form a groove, the groove being located between two adjacent intake passages. A drain groove is formed on the cylinder head, located between the fixing part and the intake passage, with its upper end communicating with the groove. A gap exists between the bottom of the drain groove and the mounting surface along a direction perpendicular to the mounting surface.

[0007] Furthermore, the bottom of the drain tank extends basically along a plane, which is defined as the bottom plane. Both the bottom plane and the mounting plane are basically parallel to the center line of the crankshaft. A plane perpendicular to the center line of the crankshaft is defined as the projection plane. The orthographic projection of the bottom plane onto the projection plane is the first projection line, and the orthographic projection of the mounting plane onto the projection plane is the second projection line. The acute angle between the first projection line and the second projection line ranges from 0° to 20°.

[0008] Furthermore, the acute angle formed by the first projection line and the second projection line ranges from 5° to 18°.

[0009] Furthermore, the minimum distance between the first projection line and the second projection line ranges from 4.2 mm to 7.6 mm.

[0010] Furthermore, the minimum distance between the first projection line and the second projection line ranges from 4.7 mm to 6.4 mm.

[0011] Furthermore, the fixing part is provided with a fixing plane for connecting with the intake pipe. The fixing plane is basically parallel to the axis of the crankshaft. The orthographic projection of the fixing plane on the projection plane is the third projection line. The maximum distance between the third projection line and the first projection line is 4.4mm to 7.9mm.

[0012] Furthermore, a drain groove is provided between the fixed part and each of the two adjacent air intakes.

[0013] Furthermore, the width of the drain opening is greater than the width of the drain bottom.

[0014] Furthermore, the cross-sectional area of ​​the outer wall of the fixing part away from the cylinder head is smaller than the cross-sectional area of ​​the outer wall of the fixing part close to the cylinder head.

[0015] Furthermore, the distance between the end of the groove bottom plane closest to the groove and the mounting plane is greater than the distance between the end of the groove bottom plane furthest from the groove and the mounting plane.

[0016] To achieve the above objectives, this application also adopts the following technical solution:

[0017] A motorcycle includes a frame, a body panel, a running gear, and an engine as described in any of the above embodiments, wherein the body panel at least partially covers the frame; the running gear is at least partially located below the frame; and the engine is supported by the frame and drivenly connected to the running gear.

[0018] In this application, by opening a drain groove, the accumulated liquid in the groove can be drained, thereby preventing the accumulated liquid from overflowing into the intake manifold, which in turn helps to improve the service life of the engine. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a motorcycle provided in an embodiment of this application.

[0020] Figure 2 This is a schematic diagram of the overall structure of a motorcycle engine provided in an embodiment of this application.

[0021] Figure 3 This is an exploded schematic diagram of a motorcycle engine provided in an embodiment of this application.

[0022] Figure 4 This is a schematic diagram of the cylinder head structure of an engine provided in an embodiment of this application.

[0023] Figure 5 This is a cross-sectional schematic diagram of the cylinder head of an engine provided in an embodiment of this application.

[0024] Figure 6 Examples of embodiments of this application Figure 5 A schematic diagram of the cross-sectional view. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in specific embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0026] like Figure 1 and Figure 2 As shown, this application provides a motorcycle 100, which includes a frame 11, a body panel 12, a running system 13, a suspension system 14, a seat 15, an electrical system 16, a transmission system (not shown) and an engine 200.

[0027] For ease of description, this application defines the directions of front, back, left, right, up, and down. The front-back direction refers to the length direction of the motorcycle frame 11, the left-right direction refers to the width direction of the motorcycle frame 11, and the up-down direction refers to the height direction of the motorcycle frame 11. In this embodiment, the directions of front, back, left, right, up, and down are based on the motorcycle 100 traveling on a level road surface, not on a sloping road surface.

[0028] The frame 11 serves as the basic framework of the motorcycle 100, supporting the body panel 12, running system 13, suspension system 14, seat 15, electrical system 16, transmission system, and engine 200. The body panel 12 is at least partially located on and connected to the frame 11, protecting the internal components of the motorcycle 100. The running system 13 is at least partially located below the frame 11, and the suspension system 14 connects the running system 13 to the frame 11. The engine 200 is supported by the frame 11. The electrical system 16 is supported by the frame 11 and is at least partially mounted on the body panel 12 or the frame 11. The electrical system 16 is used to display the motorcycle 100's driving data and control the motorcycle 100's operation. The seat 15 is supported by the frame 11 and is used to support the driver and / or passenger. The transmission system is used to transmit power from the engine 200. The transmission system includes a gear shift mechanism, which is supported by the frame 11 and connects the engine 200 to the running system 13.

[0029] like Figure 3 As shown, the engine 200 includes a housing 21, a crankshaft 22, an intake mechanism 23, an ignition mechanism (not shown), a timing mechanism 25, and a piston mechanism 26. The housing 21 serves as the basic frame of the engine 200, supporting the crankshaft 22, intake mechanism 23, ignition mechanism, timing mechanism 25, and piston mechanism 26. Specifically, the housing 21 includes a cylinder head cover 211, a cylinder head 212, a cylinder block 213, a crankcase 214, and an oil pan 215, which are connected sequentially. The cylinder head 212 and cylinder block 213 are connected to form a combustion chamber. The intake mechanism 23 is connected to the cylinder head 212 and supplies air to the combustion chamber to mix air and fuel to form an air-fuel mixture. The ignition mechanism is at least partially located within the combustion chamber and is used to ignite the air-fuel mixture. A piston mechanism 26 is at least partially located within the cylinder block 213. The piston mechanism 26 converts the thermal energy generated by the combustion of the air-fuel mixture into mechanical energy. Specifically, the piston mechanism 26 includes a piston that converts thermal energy into reciprocating mechanical energy. A crankshaft 22 is at least partially located within the crankcase 214 and is rotatably connected to the crankcase 214. The crankshaft 22 converts the reciprocating motion of the piston into rotational motion and is drively connected to a transmission mechanism. A timing mechanism 25 is at least partially located within the cylinder head 212 and is drively connected to the crankshaft 22. The timing mechanism 25 controls the intake and exhaust of the engine 200.

[0030] like Figure 4 , Figure 5 and Figure 6 As shown, in one embodiment, the cylinder head 212 is formed with an intake passage 2124, and the intake mechanism 23 includes an intake pipe 231, which is connected to the intake passage 2124 so that the intake pipe 231 and the intake passage 2124 can deliver gas supplied by the engine 200.

[0031] It should be noted that in this application, the intake pipe 231 is a throttle valve (not shown) connecting pipe, that is, the intake pipe 231 of this application is used to connect the throttle valve and the intake manifold 2124.

[0032] In this embodiment, the cylinder head 212 is provided with a mounting surface 2124c, and the port of the intake manifold 2124 is located on the mounting surface 2124c. At least two intake manifolds 2124 and mounting surfaces 2124c are provided, with each intake manifold 2124 corresponding to one mounting surface 2124c. The cylinder head 212 is provided with a fixing part 2125, which is used to fix the intake pipe 231 connection and to connect the intake pipe 231 to the port of the intake manifold 2124. The fixing part 2125 is located between two adjacent intake manifolds 2124.

[0033] Specifically, the outer wall of the cylinder head 212 and the fixing part 2125 together form a groove 2129. The groove 2129 is located between two adjacent intake ports 2124, and the cylinder head 212 is provided with a drain groove 2126. The drain groove 2126 is located between the fixing part 2125 and the intake port 2124, and the upper end of the drain groove 2126 is connected to the groove 2129. Along the direction perpendicular to the mounting plane, there is a gap between the bottom of the drain groove 2126 and the mounting plane 2124c.

[0034] It should be noted that both the fixing part 2125 and the air intake 2124 are convex relative to the outer wall of the cylinder head 212, so that the groove 2129 will accumulate rainwater and other liquids.

[0035] In this application, the drain groove 2126 is connected to the groove 2129, so that the liquid accumulated in the groove 2129 can be discharged through the gap of the drain groove 2126. This can prevent excessive liquid accumulation in the groove 2129 from overflowing into the intake manifold 2124, thereby preventing the air transported by the intake manifold 2124 from containing liquid and causing the liquid-containing air to mix with the fuel in the engine 200, which would damage the engine 200. This is beneficial to improving the service life of the engine 200.

[0036] It should be noted that the two outermost air intakes 2124 are defined as the first air intake 2124a and the second air intake 2124b. The cylinder head 212 is also provided with a first fixing part 212i and a second fixing part 212j. The first fixing part 212i is provided on the side of the first air intake 2124a away from the second air intake 2124b along the axis of the crankshaft 22. The second fixing part 212j is provided on the side of the second air intake 2124b away from the first air intake 2124a along the axis of the crankshaft 22. Both the first fixing part 212i and the second fixing part 212j are used to connect with the intake pipe 231, thereby improving the connection stability between the intake pipe 231 and the cylinder head 212.

[0037] In one embodiment, a drain trough 2126 is provided between the fixing part 2125 and each of the two adjacent air intakes 2124. This arrangement can improve the drainage capacity of the aforementioned drain trough, thereby preventing the water accumulation rate of the drain trough from exceeding the drainage rate of a single drain trough 2126, which would result in excessive liquid accumulation in the drain trough. This prevents the liquid in the drain trough from overflowing into the air intake 2124 and causing damage to the engine 200, thereby further improving the service life of the engine 200.

[0038] In one implementation, the bottom of the drain groove 2126 extends substantially along a plane, defined as the bottom plane 109. Both the bottom plane 109 and the mounting plane 2124c are substantially parallel to the centerline of the crankshaft 22, and the height of the end of the bottom plane 109 near the cylinder head 212 is higher than the height of the end of the bottom plane 109 away from the cylinder head 212, so that accumulated liquid can be smoothly drained from the drain groove 2126. A plane perpendicular to the centerline of the crankshaft 22 is defined as the projection plane 103. The orthographic projection of the bottom plane 109 onto the projection plane 103 is the first projection line, and the orthographic projection of the mounting plane 2124c onto the projection plane 103 is the second projection line.

[0039] In this embodiment, the acute angle γ formed by the first projection line and the second projection line ranges from 0° to 20°. Specifically, the acute angle γ formed by the first projection line and the second projection line ranges from 5° to 18°. More specifically, the acute angle γ formed by the first projection line and the second projection line is 15°. This setting avoids the acute angle γ formed by the first projection line and the second projection line being too large, which would result in the bottom of the drain trough 2126 having an excessively small inclination angle relative to the water accumulation trough. This, in turn, avoids the water accumulation trough having an excessively small inclination angle, which would reduce the drainage capacity of the drain trough 2126. Consequently, it prevents the excessive accumulation of liquid in the water accumulation trough from overflowing into the intake manifold 2124 due to insufficient drainage capacity of the drain trough 2126, thereby improving the service life of the engine 200.

[0040] In one implementation, the minimum distance D1 between the first projection line and the second projection line ranges from 4.2 mm to 7.6 mm. Specifically, the minimum distance D1 between the first projection line and the second projection line ranges from 4.7 mm to 6.4 mm. More specifically, the minimum distance D1 between the first projection line and the second projection line is 5.3 mm. With this configuration, when the length of the bottom of the drainage trough 2126 along the bottom plane 109 remains constant, it avoids the minimum distance D1 between the first projection line and the second projection line being too small, which would result in an excessively small inclination angle of the bottom of the drainage trough 2126 relative to the aforementioned water accumulation trough, thereby improving the drainage capacity of the drainage trough 2126.

[0041] Furthermore, in this application, along the width direction of the frame 11, the drain groove 2126 is respectively formed on both sides of the adjacent fixing part 2125 and the air intake duct 2124. Also, along the length direction of the frame 11, the thickness of the area on the fixing part 2125 where the drain groove 2126 is formed is less than the thickness of the area on the fixing part 2125 where the drain groove 2126 is not formed. Therefore, when the length of the bottom of the drain trough 2126 along the flow direction of the accumulated liquid in the drain trough 2126 remains unchanged, it can also avoid the minimum distance D1 between the first projection line and the second projection line being too large, which would result in too many areas of the drain trough 2126 being opened on the fixing part 2125. This avoids the area of ​​the drain trough 2126 being opened on the fixing part 2125 being too large, which would result in too small an overall thickness of the fixing part 2125. In turn, it avoids the overall thickness of the fixing part 2125 being too small, which would reduce the structural strength of the fixing part 2125. This is conducive to improving the structural strength of the fixing part 2125, and consequently, to improving the connection stability between the air intake pipe 231 and the fixing part 2125.

[0042] In one embodiment, the fixing part 2125 is provided with a fixing plane 2125a, which is used to connect the fixing part 2125 to the intake pipe 231. The fixing plane 2125a is substantially parallel to the axis of the crankshaft 22. The orthographic projection of the fixing plane 2125a onto the projection plane 103 is a third projection line. The maximum distance D2 between the third projection line and the first projection line ranges from 4.4 mm to 7.9 mm. Specifically, the maximum distance D2 between the third projection line and the first projection line ranges from 4.9 mm to 6.6 mm. More specifically, the maximum distance D2 between the third projection line and the first projection line is 5.5 mm. This arrangement avoids the maximum distance D2 between the third projection line and the first projection line being too small, which would result in the drain trough 2126 being too small. This prevents the drainage capacity of the drain trough 2126 from being less than the water storage capacity of the water accumulation trough, thus preventing the accumulated liquid in the water accumulation trough from overflowing into the intake manifold 2124, thereby improving the service life of the engine 200.

[0043] In addition, it can also avoid the maximum distance D2 between the third projection line and the first projection line being too large, which would result in too many areas of the fixing part 2125 having drainage grooves 2126, thereby helping to improve the structural strength of the fixing part 2125.

[0044] In one embodiment, the cylinder head 212 includes a cylinder head body 2127 and intake protrusions 2128. There are at least two intake protrusions 2128, and the opening of each intake passage 2124 is located on a corresponding intake protrusion 2128. Specifically, a fixing portion 2125 is located between two adjacent intake protrusions 2128, and the fixing portion 2125 is integrally formed with the cylinder head body 2127. A drain groove 2126 is located between the fixing portion 2125 and the intake protrusions 2128. In this embodiment, the mounting plane 2124c is located on the intake protrusion 2128.

[0045] In one implementation, the width of the opening of the drainage channel 2126 is greater than the width of the bottom of the drainage channel 2126. This design allows the drainage channel 2126 to be flared, which facilitates the drainage of accumulated liquid in the groove 2129.

[0046] As an optional implementation, the cross-sectional area of ​​the outer wall of the fixing part 2125 away from the cylinder head 212 is smaller than the cross-sectional area of ​​the outer wall of the fixing part 2125 near the cylinder head 2122. This arrangement allows the fixing part 2125 to have a trapezoidal shape with a smaller upper end and a larger lower end, which helps to improve the structural strength of the fixing part 2125. Furthermore, when a drain groove 2126 is provided, drainage of the groove 2129 can be achieved while meeting the strength requirements of the fixing part 2125, which facilitates a stable connection between the intake manifold 2124 and the intake pipe 231.

[0047] In one implementation, the distance D2 between the end of the bottom plane 109 near the groove 2129 and the mounting plane 2124c is greater than the distance D1 between the end of the bottom plane 109 away from the groove 2129 and the mounting plane 2124c. This arrangement allows more liquid to drain from the groove 2129 through the end of the bottom plane 109 near the groove 2129, thus improving the drainage efficiency of the drain tank 2126. Furthermore, a smaller D1 increases the structural strength of the drain tank 2126, which in turn improves the overall strength of the air intake pipe 231.

[0048] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An engine, comprising: A housing, the housing including a crankcase and a cylinder head, the cylinder head having an intake manifold; A crankshaft located within the crankcase and rotatably connected to the crankcase; An air intake mechanism, the air intake mechanism including an air intake pipe communicating with the air intake passage; The cylinder head is provided with a mounting surface, and the port of the intake manifold is located on the mounting surface; there are at least two intake manifolds and at least two mounting surfaces, and the intake manifolds correspond one-to-one with the mounting surfaces; the cylinder head is provided with a fixing part, which is used to fix the intake pipe and connect the intake pipe to the port of the intake manifold, and the fixing part is located between two adjacent intake manifolds; Its features are, The outer wall of the cylinder head and the fixing part together form a groove, and the groove is located between two adjacent air intakes; a drain groove is provided on the cylinder head, the drain groove is located between the fixing part and the air intake, and the upper end of the drain groove is connected to the groove; along the direction perpendicular to the mounting plane, there is a gap between the bottom of the drain groove and the mounting plane.

2. The engine according to claim 1, characterized in that, The bottom of the drainage trough extends substantially along a plane, which is defined as the trough bottom plane. Both the trough bottom plane and the mounting plane are substantially parallel to the center line of the crankshaft. A plane perpendicular to the center line of the crankshaft is defined as the projection plane. The orthographic projection of the trough bottom plane onto the projection plane is the first projection line, and the orthographic projection of the mounting plane onto the projection plane is the second projection line. The acute angle formed by the first projection line and the second projection line ranges from 0° to 20°.

3. The engine according to claim 2, characterized in that, The acute angle formed by the first projection line and the second projection line ranges from 5° to 18°.

4. The engine according to claim 2, characterized in that, The minimum distance between the first projection line and the second projection line ranges from 4.7 mm to 6.4 mm.

5. The engine according to claim 2, characterized in that, The fixing part is provided with a fixing plane for connecting with the intake pipe. The fixing plane is basically parallel to the axis of the crankshaft. The orthographic projection of the fixing plane on the projection plane is a third projection line. The maximum distance between the third projection line and the first projection line is 4.4 mm to 7.9 mm.

6. The engine according to claim 1, characterized in that, A drain groove is provided between the fixed part and each of the two adjacent air intakes.

7. The engine according to claim 1, characterized in that, The width of the drain opening is greater than the width of the drain bottom.

8. The engine according to claim 7, characterized in that, The cross-sectional area of ​​the fixing part away from the outer wall of the cylinder head is smaller than the cross-sectional area of ​​the fixing part near the outer wall of the cylinder head.

9. The engine according to claim 2, characterized in that, The distance between the end of the groove bottom plane closest to the groove and the mounting plane is greater than the distance between the end of the groove bottom plane furthest from the groove and the mounting plane.

10. A motorcycle, comprising: Frame; A body panel that at least partially covers the vehicle frame; A walking system, at least partially located below the vehicle frame; Its features are, The motorcycle also includes an engine as described in any one of claims 1 to 9, the engine being supported by the frame and connected in drive to the running system.

Images