Exhaust structure of engine cylinder head, engine and pedal motorcycle

Abstract

The exhaust structure of the engine cylinder head comprises a cylinder head body, the cylinder head body is provided with an exhaust passage, an air outlet of the exhaust passage is provided with a flange plate, the flange plate is used for being in flange connection with an exhaust pipe of the engine, and the end, close to the flange plate, of the exhaust pipe is provided with a bent pipe section. Therefore, the exchange efficiency of fresh air and waste gas in the combustion chamber of the engine cylinder head can be improved.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle technology, and in particular to an exhaust structure for an engine cylinder head, an engine, and a scooter. Background Technology

[0002] The cylinder head of a motorcycle engine is an important component of the engine power system, and includes major structural components such as the combustion chamber, valves, spark plugs, intake manifold, and exhaust manifold.

[0003] Currently, the exhaust structure of the engine cylinder head is poorly designed, which hinders the smooth exhaust of exhaust gas in the engine cylinder head, thereby reducing the exchange efficiency of fresh air and exhaust gas in the combustion chamber. Utility Model Content

[0004] Therefore, in order to solve the above problems, this utility model provides an exhaust structure for an engine cylinder head, an engine, and a scooter, which can improve the exchange efficiency of fresh air and exhaust gas in the combustion chamber of the engine cylinder head.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] This utility model provides an exhaust structure for an engine cylinder head, including a cylinder head body, the cylinder head body having an exhaust passage, the exhaust passage having an outlet with a flange, the flange being used to flange-connect the engine's exhaust pipe; the exhaust pipe having a bent section at one end near the flange.

[0007] Furthermore, the bending angle of the pipe section is 100° to 150°.

[0008] Furthermore, the cylinder head body has an exhaust side on the same side as the air outlet, and the exhaust side and the flange are arranged in a cross configuration.

[0009] Furthermore, the included angle between the exhaust side and the flange is 30° to 70°.

[0010] Furthermore, the flange has two locking points spaced apart to fix the exhaust pipe to the outlet; the cylinder head body has a combustion chamber side plane, and the line connecting the locking points of the flange and the combustion chamber side plane are arranged intersectingly.

[0011] Furthermore, the combustion chamber side plane is a plane, and the angle between the line connecting the locking points and the combustion chamber side plane is 15° to 35°.

[0012] Furthermore, the cylinder head body is provided with a heat dissipation channel near the air outlet to dissipate heat from the cylinder head body.

[0013] This utility model also provides an engine, which includes at least the exhaust structure of the engine cylinder head described above.

[0014] This utility model also provides a scooter, which includes at least the engine described above.

[0015] The technical solution provided by this utility model has the following beneficial effects:

[0016] By providing a bend in the exhaust pipe at one end near the flange, the resistance to exhaust gas discharge from the engine cylinder head is effectively reduced, and the exchange efficiency of fresh air and exhaust gas in the combustion chamber of the cylinder head body is improved, while the length of the exhaust pipe is shortened. Attached Figure Description

[0017] Figure 1 The diagram shown is a schematic of the exhaust structure of the engine cylinder head equipped with a bent pipe section in Embodiment 1.

[0018] Figure 2 The diagram shown is a first-view schematic of the exhaust structure of the engine cylinder head in Embodiment 1.

[0019] Figure 3 The diagram shown is a second-view schematic of the exhaust structure of the engine cylinder head in Embodiment 1;

[0020] Figure 4 The diagram shown is a third-view schematic of the exhaust structure of the engine cylinder head in Embodiment 1. Detailed Implementation

[0021] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0022] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0023] Example 1

[0024] Reference Figures 1 to 4 As shown, Embodiment 1 provides an exhaust structure for an engine cylinder head (hereinafter referred to as the exhaust structure) to facilitate the discharge of exhaust gas from the engine of a scooter.

[0025] like Figure 1 and Figure 2As shown, the exhaust structure of this embodiment includes a cylinder head body 1, the cylinder head body 1 has an exhaust passage, the exhaust port 11 of the exhaust passage is provided with a flange 111, the flange 111 is used to flange connect the exhaust pipe of the engine, and the exhaust pipe is provided with a bend section 2 at one end near the flange 111.

[0026] In this embodiment, as Figure 1 As shown, the bending angle α of the bend section 2 is 100° to 150°.

[0027] By installing a bend section 2 at one end of the engine's exhaust pipe near the flange 111, the resistance to exhaust gas discharge from the engine cylinder head is effectively reduced, and the flow rate is improved. Figure 3 The efficiency of fresh air and exhaust gas exchange in the combustion chamber 13 of the cylinder head body 1 shown is improved, while the length of the exhaust pipe is shortened.

[0028] In another preferred embodiment, the cylinder head body 1 has an exhaust side 113 on the same side as the exhaust port 11, and the exhaust side 113 is the exhaust side of the cylinder head body 1.

[0029] like Figure 3 As shown, the exhaust side 113 and the flange 111 are arranged in a cross configuration, that is, the included angle A between the exhaust side 113 and the flange 111 is 30° to 70°.

[0030] Since scooter engines often employ a horizontal engine layout, the flange 111 or exhaust port 11 is located at the bottom of the vehicle. When assembling the exhaust pipe, one only needs to squat down to see the flange 111, meaning that one person can easily assemble the exhaust pipe onto the flange 111, thus improving assembly efficiency on the production line. Of course, with the assistance of an additional lifting platform, the exhaust pipe assembly can be even easier, requiring only standing.

[0031] More specifically, such as Figure 2 As shown, the flange 111 has two locking points 112 spaced apart to fix the exhaust pipe to the air outlet 11, and the two locking points 112 are arranged in a line to form a locking point line.

[0032] The cylinder head body 1 has a combustion chamber side plane, and the line connecting the locking points of the flange 111 and the combustion chamber side plane 131 are arranged to intersect.

[0033] In this specific embodiment, such as Figure 4 As shown, the combustion chamber side plane 131 is a plane, and the included angle B between the line connecting the locking points of the flange 111 and the combustion chamber side plane 131 is 15° to 35°.

[0034] By setting the included angle A between the exhaust side 113 and the flange 111 and then reducing the included angle B, the height H or width L of the cylinder head body 1 can be effectively reduced, thereby effectively reducing the total mass of the cylinder head body 1, thus achieving a lightweight design for the engine.

[0035] Further preferred, such as Figures 2 to 4 As shown, the cylinder head body 1 is provided with a heat dissipation channel 12 near the air outlet 11 to dissipate heat from the cylinder head body 1.

[0036] In addition, by further raising the position of the locking point 112, the occupancy of the flange 111 on the heat dissipation channel 12 can be reduced, allowing the cylinder head body 1 to further increase the cross-sectional area of ​​the heat dissipation channel 12 under the same design specifications and dimensions, so as to further improve the heat dissipation effect of the cylinder head body 1, and at the same time effectively dissipate heat from the spark plug seat, thereby meeting the design requirements of a higher performance engine.

[0037] Example 2

[0038] Embodiment 2 also provides an engine, which includes at least the exhaust structure of the engine cylinder head of Embodiment 1.

[0039] Example 3

[0040] Embodiment 3 also provides a scooter motorcycle, which includes at least the engine of Embodiment 2.

[0041] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. An exhaust structure of an engine cylinder head including a cylinder head main body having an exhaust passage, characterized by: The gas outlet of the exhaust passage is provided with a flange plate for flange connecting an exhaust pipe of the engine; the exhaust pipe is provided with an elbow section near the flange plate.

2. The exhaust structure of an engine cylinder head according to claim 1, characterized by: The bending angle of the elbow section is 100-150 degrees.

3. The exhaust structure of an engine cylinder head according to claim 1 or 2, characterized by: The cylinder head body has an exhaust side surface on the same side as the gas outlet, and the exhaust side surface and the flange plate are cross arranged.

4. The exhaust structure of an engine cylinder head according to claim 3, characterized by: The included angle between the exhaust side surface and the flange plate is 30-70 degrees.

5. The exhaust structure of an engine cylinder head according to claim 4, characterized by: The flange plate has two spaced locking points for fixedly connecting the exhaust pipe to the gas outlet; the cylinder head body has a combustion chamber side plane, and the locking point connecting line of the flange plate and the combustion chamber side plane are cross arranged.

6. The exhaust structure of an engine cylinder head according to claim 5, characterized by: The combustion chamber side plane is a plane, and the included angle between the locking point connecting line and the combustion chamber side plane is 15-35 degrees.

7. The exhaust structure of an engine cylinder head according to claim 1 or 2, characterized by: The cylinder head body is provided with a heat dissipation channel near the gas outlet for discharging heat in the cylinder head body.

8. An engine characterized by: At least an exhaust structure of an engine cylinder head as claimed in any one of claims 1-7.

9. Scooter, characterized in that: At least an engine as claimed in claim 8.

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