Air cooling structure of motorcycle engine cylinder head and cylinder head
By designing the intake flow path, outlet flow path and heat dissipation fins on the cylinder head of the motorcycle engine, the problem of insufficient heat dissipation of the air-cooled structure is solved, the cylinder head temperature is reduced, the engine life is extended and the failure rate is reduced.
Patent Information
- Application Number
- CN202421216483.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The air-cooled structure of existing motorcycle engines is insufficient in terms of heat dissipation effect, resulting in high temperatures having high failure rate for engine operation and short service life.
An air-cooled structure of the cylinder head of a motorcycle engine is designed. By setting an intake and outlet flow path on the cylinder head body, the air flow rate is accelerated by the diverter plate and heat dissipation fins, the heat is taken away, and the intake box is passed and The reinforcement plate improves structural strength and drainage effect.
It effectively reduces the cylinder head temperature, extends the engine service life, reduces the damage to the transmission components by high temperatures, and reduces the operating failure rate.
Smart Images
Figure CN222254154U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of motorcycle engine accessories, in particular to an air cooling structure of a motorcycle engine cylinder head and a cylinder head. Background Art
[0002] A motorcycle engine is a machine that ignites the fuel mixture that enters the cylinder, converts the heat energy generated by its combustion into mechanical energy, and transmits the power to the rear wheel of the motorcycle through the transmission mechanism via the crankshaft, thereby converting it into the driving force of the vehicle.
[0003] The cooling technology of motorcycle engines is mainly divided into two types: air cooling and water cooling. Water cooling technology dissipates heat by circulating coolant (usually water or ethylene glycol). This technology uses a complete water tank and water circulation system to circulate the coolant inside the engine, absorbing and taking away the heat generated by the engine to achieve the purpose of cooling. The main configuration of a water-cooled engine includes a water pump, a water tank temperature control, and a fan. When the temperature is high, the throttle valve will open all the water tanks to start working, and when the temperature is too high, the fan will turn on to cool down to the optimal operating temperature of the engine. The heat dissipation efficiency of the water cooling system is usually higher than that of the air cooling system, and it can maintain a stable working state under higher loads and longer periods of high-intensity driving. In addition, the water cooling system can also ensure that the oil does not cool prematurely before achieving proper lubrication through the adjustment of the throttle valve, so that the motorcycle can perform well under various environmental conditions. However, the cooling system of the water cooling system is relatively complex and requires more components such as pipes and pumps, so the overall weight and volume may be greater than that of an air-cooled motorcycle. In addition, the water cooling system requires regular replacement of the coolant and inspection of the working condition of the cooling system, and the maintenance cost is relatively high.
[0004] Air cooling technology mainly dissipates heat through air convection. When the motorcycle is running, the air passes through the heat sink outside the cylinder head to take away the heat inside the cylinder. A cooling air duct is also set up in the cylinder head to assist in heat dissipation. The design of the cooling air duct is one of the important factors to ensure the performance and life of the engine. The heat generated by the engine during operation and the heat dissipation requirements of different parts (such as the cylinder head, valves, spark plugs, etc.) determine the number and layout of the cooling air duct. The layout of the cooling air duct should ensure that the cooling airflow can take away as much heat from the cylinder head as possible, especially the high temperature around the dome of the combustion chamber, which will be radiated to the crankshaft and transmission mechanism through heat transfer. Excessive temperature will not only increase the failure rate of the engine, but also reduce its service life. Utility Model Content
[0005] In view of the above-mentioned deficiencies of the prior art, the technical problem to be solved by the present invention is: how to provide an air-cooling structure for the engine cylinder head that can improve the heat dissipation effect of the engine cylinder head, reduce the engine operation failure rate caused by high temperature, and extend the engine working life.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:
[0007] A wind-cooling structure for a motorcycle engine cylinder head comprises a cylinder head body, a camshaft chamber is arranged at the front end of the cylinder head body, a combustion chamber dome is arranged at the rear end of the cylinder head body, a transmission chamber is arranged on one side of the left and right directions of the cylinder head body, an intake air flow channel is arranged on the side of the cylinder head body facing away from the transmission chamber, the intake air flow channel extends through a position between the combustion chamber dome and the camshaft chamber and extends close to the transmission chamber, an end of the intake air flow channel away from the transmission chamber has an intake end capable of taking in air toward the front of the cylinder head body, a diverter plate is arranged in the intake air flow channel, the diverter plate extends from one end of the intake air flow channel facing the direction of the transmission chamber to the other end of the intake air flow channel, so that the diverter plate can divert the intake air flow channel to form a diverter air flow channel, and the end of the diverter air flow channel facing the direction of the transmission chamber extends to form an outlet air flow channel, one of the outlet air flow channels extends to the top of the cylinder head body, and the other outlet air flow channel extends to the bottom of the cylinder head body, and the end of the outlet air flow channel has an exhaust port for taking in and exhausting air toward the rear of the cylinder head body.
[0008] In the utility model, the front end of the cylinder head body is the windward surface, so that when the motorcycle is riding, the intake air channel located on the side of the cylinder head body can be used for intake, and the outlet air channel is provided with an outlet facing the rear of the cylinder head body, so that it will not be affected by the airflow in front of the cylinder head, and the gas flow in the entire cooling air channel can be smooth. The combustion chamber dome on the cylinder head body serves as the heat source of the engine, and the heat generated by it is transferred to the transmission chamber and the camshaft chamber through the cylinder body. The intake air channel extends from the side of the cylinder head body toward the position between the camshaft chamber and the combustion chamber dome, so that most of the heat that should be transferred to the camshaft chamber can be taken away, and the influence of high temperature on the camshaft transmission mechanism in the camshaft chamber can be reduced. The intake air channel extends and is close to the transmission chamber, and the gas in the intake air channel is diverted by the diverter plate, and extends to the upper end and the lower end of the cylinder head body through the outlet air channel, so that the outlet air channel can also take away the heat transferred to the transmission chamber, and the influence of high temperature on the power transmission structure in the transmission chamber can be reduced. In addition, the splitter plate can also increase the strength of the intake air duct, avoiding a reduction in the strength of the cylinder head body due to an excessively large cross-sectional area of the intake air duct.
[0009] As an optimization, an air intake box for accommodating the air intake end of the air intake channel is formed at a position corresponding to the air intake end of the air intake channel on the cylinder head body, and an air intake port is arranged at the front end of the air intake box, and the projection of the air intake port of the air intake box along the front-back direction of the cylinder head body is located outside the projection of the cylinder head body along the front-back direction of the cylinder head body, and an upper rib plate and a lower rib plate are arranged in the air intake box and at the upper and lower sides of the air intake end of the air intake channel, respectively, and the upper rib plate and the lower rib plate are fixedly connected to the air intake box and the cylinder head body, respectively, and the upper surface of the lower rib plate is inclined and can make water flow to the drainage surface outside the air intake box. The air intake box with an outward convex setting can effectively reduce the weight of the entire cylinder head body, and the air intake port located on the side of the cylinder head body will not be blocked by the cylinder head, ensuring the smooth intake. The rib plate in the air intake box can increase the strength of the air intake box, and rainwater entering the air intake box can also be discharged outward through the inclined drainage surface.
[0010] As an optimization, two valve holes connected to the inner side of the combustion chamber dome are pierced on the cavity wall of the camshaft chamber, the intake flow passage passes through the position between the two valve holes, the cylinder head body is recessed with an intake hole connected to the intake flow passage at the position corresponding to the intake end of the intake flow passage, and a spark plug hole connected to the inner side of the combustion chamber dome is pierced at the intake hole. The intake flow passage passes through the position between the two valve holes, and can also take away the heat around the valve holes, which can prevent the high temperature from affecting the control of the throttle valve; in addition, installing the spark plug at the position of the intake hole can also have a good cooling effect on the spark plug, so that the spark plug resistance value remains stable, thereby ensuring that its ignition efficiency will not be attenuated due to the high temperature of the cylinder head.
[0011] As an optimization, the side wall of the diverter airway at the middle position in the length direction thereof is protruded toward the direction where the diverter plate is located to form a protrusion, and the protrusion makes the cross-sectional area of the diverter airway at its position smaller than the cross-sectional area of the diverter airway at both ends of the diverter airway. After the airflow enters the diverter airway, the cross-sectional area in the middle of the diverter airway is reduced, so the flow rate of the airflow will increase, which can accelerate the flow rate of the air and increase the ability to remove heat.
[0012] As an optimization, the upper and lower ends of the cylinder head body are respectively protruded to form a plurality of heat dissipation fins. The heat dissipation fins arranged outside the cylinder head body can accelerate the heat dissipation capacity of the cylinder head body.
[0013] The invention also discloses a motorcycle engine cylinder head, comprising the air cooling structure of the motorcycle engine cylinder head.
[0014] Compared with the prior art, the utility model has the following beneficial effects: the utility model effectively reduces the cylinder head temperature through the layout of the intake and outlet air ducts, thereby extending the service life of the engine; in addition, it reduces the high temperature impact on the camshaft chamber and the transmission chamber, reduces the damage to the transmission components caused by thermal stress, and reduces the failure rate of equipment operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the oblique front side of the utility model;
[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the oblique rear side of the utility model;
[0017] Figure 3 It is a cross-sectional view of the utility model. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.
[0019] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In the description of the utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when used, which is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In addition, the terms "horizontal", "vertical", etc. do not mean that the components are absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted. In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0020] like Figures 1 to 3 As shown, the air-cooling structure of the motorcycle engine cylinder head in this specific embodiment includes a cylinder head body 1, a camshaft chamber 2 is arranged at the front end of the cylinder head body 1, a combustion chamber dome 3 is arranged at the rear end of the cylinder head body 1, a transmission chamber 4 is arranged on one side of the left and right directions of the cylinder head body 1, and an intake flow channel is arranged on the side of the cylinder head body 1 facing away from the transmission chamber 4. The intake flow channel extends through a position between the combustion chamber dome 3 and the camshaft chamber 2 and extends close to the transmission chamber 4. The end of the intake flow channel away from the transmission chamber 4 has a portion that can be directed toward the cylinder head body 1 At the intake end for air intake in the front, a diverter plate 5 is arranged in the intake air duct, and the diverter plate 5 is extended from one end of the intake air duct toward the direction of the transmission chamber 4 to the other end of the intake air duct, so that the diverter plate 5 can divert the intake air duct to form a diverter air duct 6, and the diverter air duct 6 extends from one end in the direction of the transmission chamber 4 to form an outlet air duct 7, one of the outlet air ducts 7 extends to the top of the cylinder head body 1, and the other outlet air duct 7 extends to the bottom of the cylinder head body 1, and the end of the outlet air duct 7 has an exhaust port 15 for intake and exhaust toward the rear of the cylinder head body 1.
[0021] In this specific embodiment, an air intake box 8 for accommodating the air intake end of the intake air flow passage is formed at a position protruding on the cylinder head body 1 corresponding to the air intake end of the intake air flow passage, and an air intake port is arranged at the front end of the air intake box 8, and the projection of the air intake port of the air intake box 8 along the front-to-back direction of the cylinder head body 1 is located outside the projection of the cylinder head body 1 along the front-to-back direction of the cylinder head body 1, and an upper rib plate 9 and a lower rib plate 10 are respectively arranged in the air intake box 8 and at positions on the upper and lower sides of the air intake end of the intake air flow passage, and the upper rib plate 9 and the lower rib plate 10 are respectively fixedly connected to the air intake box 8 and the cylinder head body 1, and the upper surface of the lower rib plate 10 is inclined and can allow water to flow to the drainage surface outside the air intake box 8.
[0022] In this specific embodiment, two valve holes 11 connected to the inner side of the combustion chamber dome 3 are formed on the cavity wall of the camshaft chamber 2, and the intake flow passage passes through a position between the two valve holes 11. The cylinder head body 1 is recessed with an intake hole 12 connected to the intake flow passage at a position corresponding to the intake end of the intake flow passage, and a spark plug hole 13 connected to the inner side of the combustion chamber dome 3 is formed at the intake hole 12.
[0023] In this specific embodiment, the side wall of the diverter air channel 6 located in the middle position in its length direction is raised toward the direction of the diverter plate 5 to form a protrusion, and the protrusion makes the cross-sectional area of the diverter air channel 6 at its position smaller than the cross-sectional area of the diverter air channel 6 at both ends of the diverter air channel 6.
[0024] In this specific embodiment, a plurality of heat dissipation fins 14 are protruded from the upper and lower ends of the cylinder head body 1 .
[0025] A motorcycle engine cylinder head comprises the above-mentioned air cooling structure of the motorcycle engine cylinder head.
[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit the technical solution. Ordinary technicians in this field should understand that those modifications or equivalent replacements of the technical solution of the utility model without departing from the purpose and scope of the technical solution of the utility model should be included in the scope of the claims of the utility model.
Claims
1. An air cooling structure of a motorcycle engine cylinder head, comprising a cylinder head body, a camshaft chamber is arranged at the front end of the cylinder head body, a combustion chamber dome is arranged at the rear end of the cylinder head body, and a transmission chamber is arranged on one side of the cylinder head body in the left and right directions, characterized in that: An intake air flow passage is provided on the side of the cylinder head body facing away from the transmission chamber, and the intake air flow passage extends through a position between the combustion chamber dome and the camshaft cavity and extends close to the transmission chamber. An end of the intake air flow passage away from the transmission chamber has an intake end capable of taking in air toward the front of the cylinder head body. A diverter plate is provided in the intake air flow passage, and the diverter plate extends from one end of the intake air flow passage toward the direction where the transmission chamber is located to the other end of the intake air flow passage, so that the diverter plate can divert the intake air flow passage to form a diverter air flow passage, and an end of the diverter air flow passage toward the direction where the transmission chamber is located extends to form an outlet air flow passage, one of which extends to the top of the cylinder head body, and the other extends to the bottom of the cylinder head body. The end of the outlet air flow passage has an exhaust port for taking in and exhausting air toward the rear of the cylinder head body.
2. The air cooling structure of the motorcycle engine cylinder head according to claim 1, characterized in that: An air intake box for accommodating the air intake end of the air intake channel is formed on the cylinder head body at a position protruding thereon corresponding to the air intake end of the air intake channel, and an air intake port is arranged at the front end of the air intake box, and the projection of the air intake port of the air intake box along the front-to-back direction of the cylinder head body is located outside the projection of the cylinder head body along the front-to-back direction of the cylinder head body, and an upper rib plate and a lower rib plate are respectively arranged in the air intake box and at positions on the upper and lower sides of the air intake end of the air intake channel, the upper rib plate and the lower rib plate are respectively fixedly connected to the air intake box and the cylinder head body, and the upper surface of the lower rib plate is inclined and can allow water to flow to the drainage surface outside the air intake box.
3. The air cooling structure of the motorcycle engine cylinder head according to claim 1, characterized in that: The wall of the camshaft chamber is provided with two valve holes connected to the inner side of the combustion chamber dome, the intake air passage passes through a position between the two valve holes, the cylinder head body is provided with an intake hole connected to the intake air passage at a position corresponding to the intake end of the intake air passage, and a spark plug hole connected to the inner side of the combustion chamber dome is provided at the intake hole.
4. The air cooling structure of the motorcycle engine cylinder head according to claim 1 is characterized in that: The side wall of the diverter airway at the middle position in its length direction is protruded toward the direction of the diverter plate to form a protrusion, and the protrusion makes the cross-sectional area of the diverter airway at its position smaller than the cross-sectional area of the diverter airway at both ends of the diverter airway.
5. The air cooling structure of the motorcycle engine cylinder head according to claim 1, characterized in that: The upper and lower ends of the cylinder head body are respectively protruded to form a plurality of heat dissipation fins.
6. A motorcycle engine cylinder head, characterized in that: An air-cooling structure for a cylinder head of a motorcycle engine comprising any one of claims 1 to 5.