CN220134071U

CN220134071U - Double cam motorcycle engine cylinder head

Info

Publication number: CN220134071U
Application number: CN202321553856.2U
Authority: CN
Inventors: 王鹏; 李小波; 曾珂; 郑伟; 李飞龙; 姚中吉
Original assignee: Chongqing Zongshen Engine Manufacturing Co Ltd
Current assignee: Chongqing Zongshen Engine Manufacturing Co Ltd
Priority date: 2023-06-19
Filing date: 2023-06-19
Publication date: 2023-12-05
Anticipated expiration: 2033-06-19

Abstract

The utility model relates to the technical field of cylinders of combustion engines and discloses a double-cam motorcycle engine cylinder head which comprises a cylinder head body, a cam shaft support, an exhaust port and an air inlet, wherein the cam shaft support is positioned on the upper end face of the cylinder head body, an exhaust cam shaft hole and an air inlet cam shaft hole are formed in the cam shaft support, and the exhaust port and the air inlet are respectively positioned on the left side and the right side of the cylinder head body. The engine has the advantages of small rotational inertia of the cylinder head and good engine performance.

Description

Double cam motorcycle engine cylinder head

Technical Field

The utility model relates to the technical field of cylinders of combustion engines, in particular to a cylinder head of a double-cam motorcycle engine.

Background

The current market has increasingly greater demands for high-power and high-rotation-speed motorcycles, and further stricter requirements are put forward on the design of engines. For a double-cam motorcycle engine, a cylinder head is an important design point and carries most parts of a valve mechanism, and the valve mechanism comprises an exhaust cam shaft hole, an intake cam shaft hole, an exhaust port and an air inlet, and meanwhile, the functions of cooling, intake and exhaust are ensured.

Chinese patent document CN215170414U discloses a double cam motorcycle engine cylinder head, including cylinder head body and camshaft support, the camshaft support can be dismantled with the cylinder head body and be connected, be provided with the first half hole of camshaft on the cylinder head body, be provided with the camshaft second half hole that forms the camshaft hole with first half hole cooperation on the camshaft support, when camshaft support and cylinder head body coupling, intake camshaft first half hole and intake camshaft second half hole lock form with intake camshaft complex intake camshaft hole, simultaneously, exhaust camshaft first half hole and exhaust camshaft second half hole lock form with exhaust camshaft complex exhaust camshaft hole.

This prior art has the following disadvantages: at present, the rotational inertia of a valve actuating mechanism of a conventional engine cylinder head in the running process can directly influence the service performance of the engine, and the mass is reduced by reducing the overall size of the cylinder head, so that the rotational inertia of the valve actuating mechanism is reduced, but the overall size is reduced, the air inlet and outlet circulation capacity is poor, the power of the engine can be influenced, and therefore, the rotational inertia of the cylinder head cannot be simultaneously satisfied, and the air inlet and outlet circulation capacity is good.

Disclosure of Invention

The utility model provides a double-cam motorcycle engine cylinder head for solving the technical problems of large moment of inertia and good air inlet and outlet circulation capacity of the cylinder head, which comprises a cylinder head body, a cam shaft support, an air outlet and an air inlet, wherein the cam shaft support is positioned on the upper end face of the cylinder head body, an air outlet cam shaft hole and an air inlet cam shaft hole are arranged on the cam shaft support, and the air outlet and the air inlet are respectively positioned on the left side and the right side of the cylinder head body.

In order to further reduce the volume of the cylinder head, the exhaust cam shaft hole is positioned at a low position of the upper end face of the cylinder head body, the intake cam shaft hole is positioned at a high position of the upper end face of the cylinder head body, and the exhaust cam shaft hole is closer to the lower end face of the cylinder head body than the intake cam shaft hole.

Preferably, the air inlet is in a double-semicircle flat shape, so that the air inlet circulation capacity is improved, and the maximum performance of the engine is facilitated.

In order to prevent oil film failure on the surfaces of engine oil and parts caused by overhigh temperature, a cooling water outlet is arranged above the exhaust port, a cooling water inlet is arranged on the lower end face of the cylinder head body, and cooling water takes away more heat when passing through a plurality of exhaust ports, so that the heat dissipation effect is improved, and the temperature of the engine is in an optimal working state.

In order to facilitate installation, the air inlet connection end face of the air inlet is of an inclined quadrilateral structure, and bolt holes are formed in the air inlet connection end face and the air outlet connection end face of the air outlet.

Further, the air inlet, the air outlet and the bolt holes are integrally formed.

The utility model has the following beneficial effects:

1. the rotary inertia is small, and the engine performance is good: by lowering the gravity center of the valve mechanism at one side of the exhaust port and matching with the engine cylinder head with the inclined upper end surface, the rotational inertia of the valve mechanism can be reduced, and the reliability of the valve mechanism is improved; meanwhile, the inclined engine cylinder head structure enables the layout to be more compact, the volume of the cylinder head can be reduced, and more space is reserved for the whole vehicle frame; meanwhile, the shape of the air inlet and outlet openings is designed in a flat shape, so that the unit area is increased, the circulation of air inlet and outlet media is facilitated, and the air inlet and outlet opening structure has a performance promoting effect on a high-power high-rotation-speed engine. The cooling water outlet is arranged at one side of the exhaust port, and because the temperature of the exhaust port is high, more heat can be taken away by the cooling water, so that the temperature of the engine is in an optimal working state, and further, the performance requirement of the existing motorcycle is met.

Drawings

FIG. 1 is a schematic diagram of an embodiment of a cylinder head of a dual cam motorcycle engine;

FIG. 2 is a schematic view of the engine cylinder head of the dual cam motorcycle of FIG. 1 from another perspective;

FIG. 3 is a front view of FIG. 1;

fig. 4 is a schematic view of the lower end face in fig. 1.

Detailed Description

The following is a further detailed description of the embodiments:

1. reference numerals in the drawings of the specification include: the cylinder head comprises a cylinder head body 1, an upper end face 101, a lower end face 102, an exhaust cam shaft hole 103, an intake cam shaft hole 104, a cam shaft bracket 2, an exhaust port 3, an exhaust bolt hole 301, an air inlet 4, an intake bolt hole 401, a cooling water outlet 5, an intake connection end face 6, an exhaust connection end face 7 and a cooling water inlet 8.

Example 1

As shown in fig. 1-4, a dual cam motorcycle engine cylinder head comprises a cylinder head body 1, a cam shaft support 2, an exhaust port 3 and an air inlet 4, wherein the cylinder head body 1 is provided with two end faces, namely an upper end face 101 and a lower end face 102, the cam shaft support 2 is detachably connected to the upper end face 101 of the cylinder head body 1, an exhaust cam shaft hole 103 and an air inlet cam shaft hole 104 are arranged on the cam shaft support 2, the exhaust port 3 and the air inlet 4 are respectively positioned on the left side and the right side of the cylinder head body 1, the upper end face 101 of the cylinder head body 1 is obliquely arranged relative to the lower end face 102, the exhaust cam shaft hole 103 and the air inlet cam shaft hole 104 are positioned at different heights, and the air inlet 4 is in a dual semicircular flat mouth shape, so that a fluid medium in unit time can be better introduced and discharged, and the performance is improved.

The exhaust camshaft hole 103 is located at a lower position of the upper end face 101 of the cylinder head body 1, the intake camshaft hole 104 is located at a higher position of the upper end face 101 of the cylinder head body 1, and the exhaust camshaft hole 103 is closer to the exhaust port 3.

The cooling water outlet 5 is connected above the exhaust port 3 in an interference manner, the lower end face 102 of the cylinder head body 1 is provided with a plurality of cooling water inlets 8, the cooling water inlets 8 are communicated with the cooling water outlet 5 through the flow channels inside the cylinder head body 1, the cooling water outlet 5 is arranged above the exhaust port 3, cooling water can take away more heat when passing through the exhaust port 3, thereby improving the heat dissipation effect, and preventing engine oil and part surface oil films from losing efficacy due to overhigh temperature under the optimal working state of the engine temperature.

The air inlet connection end face 6 of the air inlet 4 is of an inclined quadrilateral structure, the inclined face is upward, 4 air inlet bolt holes 401 are formed in the air inlet connection end face 6, 4 air outlet bolt holes 301 are formed in the air outlet connection end face 7 of the air outlet 3, and the air outlet 3, the air outlet bolt holes 301, the air inlet 4 and the air inlet bolt holes 401 are integrally formed and are used for connecting an air inlet pipe or a valve body.

The foregoing is merely an embodiment of the present utility model, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application date or before the priority date, can know all the prior art in the field, and has the capability of applying the conventional experimental means before the date, and a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present utility model, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present utility model is subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims

1. The utility model provides a double cam motorcycle engine cylinder head, includes cylinder head body (1), camshaft support (2), gas vent (3) and air inlet (4), camshaft support (2) are located up end (101) of cylinder head body (1), be equipped with exhaust camshaft hole (103) and inlet cam shaft hole (104) on camshaft support (2), gas vent (3) and air inlet (4) are located respectively the left and right sides of cylinder head body (1), a serial communication port, up end (101) of cylinder head body (1) are set up for lower terminal surface (102) slope, exhaust camshaft hole (103) and inlet cam shaft hole (104) are located not co-altitude, air inlet (4) are flat mouth form structure.

2. The dual cam motorcycle engine cylinder head of claim 1, wherein: the exhaust camshaft hole (103) is positioned at a low position of the upper end face (101) of the cylinder head body (1), and the intake camshaft hole (104) is positioned at a high position of the upper end face (101) of the cylinder head body (1).

3. The dual cam motorcycle engine cylinder head of claim 2, wherein: the air inlet (4) is in a shape of a double semicircle flat opening.

4. A dual cam motorcycle engine cylinder head according to any one of claims 1-3, characterized in that: a cooling water outlet (5) is arranged above the exhaust port (3), and a cooling water inlet (8) is arranged on the lower end face (102) of the cylinder head body (1).

5. The dual cam motorcycle engine cylinder head of claim 4, wherein: the air inlet connecting end face (6) of the air inlet (4) is of an inclined quadrilateral structure, and bolt holes are formed in the air inlet connecting end face (6) and the air outlet connecting end face (7) of the air outlet (3).

6. The dual cam motorcycle engine cylinder head of claim 5, wherein: the air inlet (4), the air outlet (3) and the bolt holes are integrally formed.