WO2012122820A1

WO2012122820A1 - Vertical-shaft gasoline engine cylinder head assembly and gasoline engine having same

Info

Publication number: WO2012122820A1
Application number: PCT/CN2011/082489
Authority: WO
Inventors: 车毕波
Original assignee: 隆鑫通用动力股份有限公司
Priority date: 2011-03-14
Filing date: 2011-11-18
Publication date: 2012-09-20
Also published as: CN102305147B; CN102305147A

Abstract

Disclosed are a vertical-shaft gasoline engine cylinder head assembly and a gasoline engine having same, comprising a cylinder head body (1), an intake passage (12) disposed on said cylinder head body (1), and an exhaust passage (11) disposed on said cylinder head body (1). An intake valve (5) corresponding to the intake passage (12) is provided on the cylinder head body (1). An exhaust valve (9) corresponding to the exhaust passage (11) is provided on the cylinder head body (1). An intake rocker arm (8) and an intake push rod are provided corresponding to the intake valve (5). An exhaust rocker arm (2) and exhaust push rod are provided corresponding to the exhaust valve (9). A line connecting the axis of the intake valve and the axis of the exhaust valve and a line connecting the axis of the intake push rod and the axis of the exhaust push rod intersect between the axis of the intake push rod and the axis of the exhaust push rod.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention generally relates to a power machine component, and more particularly to a vertical shaft gasoline engine cylinder head assembly and a gasoline engine thereof. BACKGROUND OF THE INVENTION A gasoline engine is a power machine that uses gasoline as a fuel. It is composed of a cylinder, a crank connecting rod mechanism, a gas distribution system, a fuel supply system, a lubrication system and an ignition system; the cylinder head is provided with an intake passage and an exhaust passage, and together with the cylinder constitutes a combustion chamber surface, and thus, belongs to a gasoline engine More important parts. Gasoline, as a mixture of fuel and air, burns in the combustion chamber, generating a large amount of heat for use as driving energy. The gas distribution system of the gasoline engine is a necessary component for ensuring the normal operation of the gasoline engine. Generally, the intake and exhaust valves provided on the cylinder head are included. The opening and closing of the intake and exhaust valves are driven by the rocker arm assembly and the like. Controlled separately; the intake and exhaust valves are respectively provided with rocker arm assemblies that drive their opening and closing. The intake and exhaust valves are used to open and close the intake and exhaust passages, and to accommodate the inhalation, combustion work and exhaust in the combustion chamber to maintain the normal operation of the gasoline engine. Therefore, the arrangement of the intake and exhaust valves as well as the intake and exhaust passages plays a crucial role in the normal intake, combustion and exhaust of the combustion chamber. The opening and closing of the intake and exhaust valves is generally achieved by the interaction of the return spring and the rocker drive assembly. In the prior art, the rocker arm and the valve are arranged in a rectangular shape, that is, the parallel and nearly parallel rocker arms, and the inlet and exhaust passages are adapted to the valve, and a certain spacing needs to be staggered to affect the intake and exhaust quality; Some valve arrangements not only occupy a large space, but also can not adapt to the intake and exhaust directions of the intake and exhaust passages, reduce the power of the gasoline engine, and affect the emissions; especially for the structure of the inclined valve, it will further Increase the footprint and affect the placement of other components such as carburetor/air filter. According to the theory, the inclined valve is generally beneficial to the organization of intake air, reducing the intake and exhaust resistance, which is beneficial to improve the efficient operation of the gasoline engine and reduce emissions. However, for gasoline engines, the arrangement of intake and exhaust valves on the cylinder head has limitations. The use of inclined valves increases the valve layout and affects other components (such as carburetor/air filter). Arrangement; especially for vertical axis gasoline engines with lower camshafts, the use of a tilted valve affects the placement of the push rod and camshaft. Therefore, it is necessary to improve the valve head of the gasoline engine, and reduce the occupied space of the valve and the rocker arm under the premise of facilitating the arrangement of other components. The intake and exhaust passages can be set according to the requirements of intake and exhaust, and can be inclined. The valve organizes the intake and intake vortex in the cylinder to improve the intake efficiency, increase the airflow disturbance in the cylinder, accelerate the combustion, reduce the exhaust resistance, increase the engine power and reduce the emissions. SUMMARY OF THE INVENTION In view of the above, the present invention provides a vertical axis gasoline engine cylinder head assembly and a gasoline engine thereof, which can reduce the occupied space of the valve and the rocker arm under the premise of facilitating the arrangement of other components, and the intake and exhaust passages can be based on The exhaust gas needs to be set, and the inclined valve can be used to organize the intake tumble and the intake vortex in the cylinder, improve the intake efficiency, increase the in-cylinder airflow disturbance, accelerate the combustion, reduce the exhaust resistance, increase the engine power and reduce emission. The vertical axis gasoline engine cylinder head assembly of the present invention comprises a cylinder head body and an intake passage and an exhaust passage disposed on the cylinder head body, and the cylinder head body is provided with an intake air corresponding to the intake passage An exhaust valve is disposed corresponding to the exhaust passage, and the intake valve is correspondingly provided with an intake rocker arm and an intake push rod, and the exhaust valve is correspondingly provided with an exhaust rocker arm and an exhaust pusher. A line connecting the valve axis and the exhaust valve axis intersects the line of the intake push rod axis and the exhaust push rod axis between the intake push rod axis and the exhaust push rod axis. Further, the top of the intake valve is inclined toward the intake passage side, and the top of the exhaust valve is inclined toward the exhaust passage side. Further, an angle between a line connecting the intake valve axis and the exhaust valve axis and a line connecting the intake push rod axis and the exhaust push rod axis is 90°±20°. With a large angle, try to make the valve area an equilateral triangle structure, reduce the occupied area, make the components of the carburetor easier to arrange, and make the cylinder head lighter. Further, a line connecting the intake valve axis and the exhaust valve axis is perpendicular to a line connecting the intake push rod axis and the exhaust push rod axis. The structure of the structure is simple, and the production is easy to standardize. The connection between the intake valve axis and the exhaust valve axis is located between the intake push rod and the exhaust push rod, which facilitates the arrangement of the intake passage to achieve the resistance of the intake and exhaust. Minimize, improve gasoline engine performance; easy to arrange parts such as carburetor / air filter, reduce transformation costs. Further, a connection level of the intake valve axis and the exhaust valve axis, an intake direction of the intake passage and an exhaust direction of the exhaust passage are both located in a horizontal plane, the intake valve top The inlet passage side is inclined in a horizontal direction, and the exhaust valve top is inclined toward the exhaust passage side in a horizontal direction. Horizontal intake and exhaust, avoiding the mutual displacement of the intake and exhaust, which is more conducive to the smoothness of the intake and exhaust and the more regular arrangement of the air passage of the cylinder head, and facilitates the flow of air into the cylinder, forming a tumble flow, accelerating combustion, and improving the gasoline engine. Work efficiency. Further, the intake passage is located between the intake push rod and the exhaust push rod, the length of the intake rocker arm is shorter than the length of the exhaust rocker arm; The resistance arm is inclined in a vertical plane to the line connecting the intake valve axis and the exhaust valve axis. The structure adopts the inclined valve and does not need to change the arrangement of the original putter The structure, the inward tilting of the resistance arm of the exhaust rocker arm can be adapted to the horizontally arranged intake and exhaust valves; and the resistance arm is tilted so that the exhaust push rod drives the exhaust rocker arm without generating additional torque, ensuring flexibility. Further, an angle between the intake valve axis and the exhaust valve axis is less than or equal to 30°; the intake rocker arm is disposed on the intake rocker arm through the intake rocker shaft, and the exhaust shake The arm is disposed on the exhaust rocker arm seat through the exhaust rocker arm shaft; the intake valve rocker arm shaft axis and the exhaust valve rocker arm shaft axis are at an angle of 45°±20° in a vertical plane. Ensure sufficient angle of inclination to ensure smooth intake and exhaust, and also ensure that the nose bridge area has sufficient width; can adapt to the needs of the rocker arm arrangement, avoiding the additional torque generated by the push rod to drive the rocker arm, which is beneficial to ensure the rocker arm It can promote the coordination, sealing and flexible driving of the valve movement; the rocker arm can be arranged reasonably according to the position of the intake and exhaust valves, which is more conducive to ensuring the valve timing and ensuring the valve timing, thereby improving performance and reducing emissions. Further, the intake rocker arm seat and the exhaust rocker arm seat are both open structures, and both ends of the intake rocker arm shaft are correspondingly penetrated into the sides of the opening of the air intake rocker arm seat and can be wound around The rotation of the own axis is coordinated by a single degree of freedom, and the intake rocker arm is fixedly disposed on the intake rocker shaft in the opening of the intake rocker seat; the two ends of the exhaust rocker shaft are correspondingly penetrated The sides of the opening of the exhaust rocker arm seat are matched with a single degree of freedom in a manner of being rotatable about an axis thereof, and the exhaust rocker arm is fixedly disposed in the opening of the exhaust rocker arm seat. Arm shaft. During the operation of the fixed rocker arm, the amount of sway or sway in all directions is small, which can effectively reduce the failure rate of the rocker arm and reduce the maintenance cost. It is suitable for the position of the intake and exhaust to properly arrange the rocker arm, which is also beneficial to ensure The valve timing ensures the valve timing, which improves performance and reduces emissions. Further, a combustion chamber surface is formed inside the cylinder head body, and a portion of the combustion chamber surface between the intake valve and the exhaust valve forms a nose bridge region, and the cylinder head body is located in the nose bridge region The outside is provided with an air-cooling passage that penetrates up and down. The completely unobstructed air-cooling passage greatly improves the cooling effect of the nose bridge area, reduces the deformation of the cylinder head at high temperatures, and improves the reliability of the valve seal. The present invention also provides a gasoline engine comprising a gasoline engine cylinder head assembly mounted to the gasoline engine, wherein the gasoline engine cylinder head is always the aforementioned vertical shaft gasoline engine cylinder head assembly. Advantageous Effects of Invention: The vertical axis gasoline engine cylinder head assembly of the present invention and its gasoline engine adopt a line connecting an intake valve axis and an exhaust valve axis to a line connecting an intake push rod axis and an exhaust push rod axis. The structure forms a triangular area and occupies a small layout area to facilitate the arrangement of other components. The vertical axis gasoline engine cylinder head assembly and the gasoline engine thereof of the invention do not change the arrangement of the existing push rods, and the intake and exhaust passages can be set according to the intake and exhaust requirements, thereby ensuring the cylinder intake and exhaust quality, reducing the exhaust resistance, and improving the engine. Power and reduce emissions. Especially for the vertical axis gasoline engine, the valve structure of the structure can realize the inclined valve structure of the lower camshaft, and the angle between the inlet and the exhaust valve and the inlet and exhaust passages is higher than that of the existing structure. Small, it is convenient to organize the intake tumble and intake vortex in the cylinder, improve the intake efficiency, increase the airflow disturbance in the cylinder, accelerate the combustion, increase the power of the gasoline engine; The resistance of the exhaust gas makes the intake and exhaust smoother, which is beneficial to increase the power of the gasoline engine, reduce fuel consumption and reduce exhaust emissions. The gasoline engine head assembly of the present invention and the HC+NOx discharged from the gasoline engine reach or exceed the US EPA standard. For a gasoline engine with a maximum power (3600 rpm) of 3.0 kW, the power can be increased to 3.6 kW, and the discharge is 9.0 g/ kW.h is reduced to 8.0g/kW.h; for a gasoline engine with a maximum power of 3.5kW, the power can be increased to 4.2kW, and the emission is reduced from 9.0g/kW.h to 8.1g/kW.h, which meets EPA3. The standard of stage 10g/kW.h. It can be seen that the gasoline engine of the present invention has higher power increase and emission reduction, which is beneficial to environmental protection. At the same time, the inclined valve can make the nose bridge area in the middle of the inlet and exhaust passages wider, which is conducive to cooling and increase the anti-deformation ability, greatly improving the cooling effect of the nose beam area, reducing the deformation of the cylinder head at high temperature, and improving Reliability. The vertical axis gasoline engine cylinder head assembly of the invention is used in a gasoline engine to save energy and reduce consumption. BRIEF DESCRIPTION OF THE DRAWINGS The invention will be further described below in conjunction with the drawings and embodiments. 1 is a schematic structural view of the present invention; and FIG. 2 is a cross-sectional view taken along line AA of FIG. 1 is a schematic structural view of the present invention, and FIG. 2 is a cross-sectional view taken along line AA of FIG. 1. FIG. 1 is a vertical axis gasoline engine cylinder head assembly of the present embodiment, including a cylinder head body 1 and a cylinder head body. The intake passage 12 and the exhaust passage 11 of the cylinder head 1 form a combustion chamber surface 13 . The cylinder head body 1 is provided with an intake valve 5 corresponding to the intake passage 12 , and is corresponding to the exhaust passage 11 . There is an exhaust valve 9, the intake valve 5 is correspondingly provided with an intake rocker arm 8 and an intake push rod (not shown), and the exhaust valve 9 is correspondingly provided with an exhaust rocker arm 2 and an exhaust push rod (there is no logo in the figure) ), the top of the intake valve 5 is inclined toward the intake passage 12 side, the top of the exhaust valve 9 is inclined toward the exhaust passage 11 side; the intake valve 5 axis and the exhaust valve 9 axis are connected and the intake push rod axis and the row The line of the air push rod axis intersects between the intake push rod axis and the exhaust push rod axis. Since the intake push rod and the exhaust push rod are vertically placed on the intake rocker arm 8 and the exhaust rocker arm 2, the intake rocker arm 8 and the exhaust rocker arm 2 and the intake push rod and the exhaust push rod are The contact point can reflect the axial position of the intake push rod and the exhaust push rod; the connection between the intake rocker arm 8 and the exhaust rocker arm 2 and the contact point of the intake push rod and the exhaust push rod in FIG. The angle a between the line connecting the axis of the intake valve 5 and the axis of the exhaust valve 9 is the connection between the axis of the intake valve 5 and the axis of the exhaust valve 9 and the axis of the intake push rod and the axis of the exhaust push rod The angle of the line. In this embodiment, the intake valve 5 is correspondingly provided with an intake rocker arm 8 and an intake push rod, and the exhaust valve 9 is correspondingly provided with an exhaust rocker arm 2 and an exhaust push rod, an intake valve 5 axis and an exhaust valve 9 axis. Connection and intake push rod axis and exhaust push rod The line connecting the axis intersects between the intake push rod axis and the exhaust push rod axis and the angle α is 90°±20°; in this embodiment, 90° is adopted; the structure forms a triangular mounting area on the cylinder head body, It occupies a small layout area, which is convenient for the arrangement of other components, and does not change the arrangement of the existing push rod. For the vertical axis gasoline engine, the inclined valve structure of the lower camshaft can be realized, the intake valve 5 and the intake air The angle between the passages 12 and the angle between the exhaust valve 9 and the exhaust passage 11 are smaller than that of the existing structure combustion chamber surface, and it is convenient to organize the intake tumble and the intake vortex in the cylinder to improve the intake efficiency. Increase the airflow disturbance in the cylinder, accelerate combustion, increase the power of the gasoline engine; reduce the resistance of the intake and exhaust, make the intake and exhaust more smooth, help to increase the power of the gasoline engine, reduce fuel consumption, and reduce exhaust emissions; especially with larger clamps Angle, maximizing the reduction of the occupied area, making the components of the carburetor easier to arrange and making the cylinder head lighter; The structure of the structure is simple, the production is easy to standardize, the intake valve 5 axis and the exhaust valve 9 axis The connection is located between the intake push rod and the exhaust push rod, which is convenient for arranging the intake passage to minimize the resistance of the intake and exhaust, and improve the performance of the gasoline engine. It is convenient to arrange the parts such as the carburetor/air filter, and reduce the transformation. cost. In this embodiment, the line connecting the axis of the intake valve 5 and the axis of the exhaust valve 9 is perpendicular to the line connecting the axis of the intake push rod and the axis of the exhaust push rod; the structure of the structure is simple, and the production is easy to standardize, the intake valve The connection between the 5 axis and the exhaust valve 9 axis is located between the intake push rod and the exhaust push rod, which facilitates the arrangement of the intake passage 12, minimizes the resistance of the intake and exhaust, and improves the performance of the gasoline engine; Parts such as air/air filters reduce the cost of retrofitting. In this embodiment, the connection level of the intake valve 5 axis and the exhaust valve 9 axis, the intake direction of the intake passage 12 and the exhaust direction of the exhaust passage 11 are both in the horizontal plane, and the top of the intake valve 5 is in the horizontal direction. Tilting to the intake passage side 12, the top of the exhaust valve 9 is inclined to the side of the exhaust passage 11 in the horizontal direction; the intake and exhaust in the horizontal direction prevent the intake and exhaust from being shifted from each other, which is more conducive to smoothing of the intake and exhaust. The airflow arrangement of the cylinder head is more regular, and it is conducive to the airflow entering the cylinder, forming a tumble flow, accelerating combustion, and improving the working efficiency of the gasoline engine. In this embodiment, the intake passage 12 is located between the intake push rod and the exhaust push rod, the length of the intake rocker arm 8 is shorter than the length of the exhaust rocker arm 2; the resistance arm of the exhaust rocker arm 2 is vertical The plane is inclined to the line connecting the intake valve 5 axis and the exhaust valve 9 axis. Since the (intake or exhaust valve) rocker arm is a lever structure, the rocker arm shaft is used as a fulcrum, and the portion for driving the valve is a resistance arm. The part that cooperates with the push rod is a power arm; the resistance arm structure of the exhaust rocker arm 2 adopts an inclined valve without changing the arrangement structure of the original push rod, and the resistance arm of the exhaust rocker arm 2 is inclined inward to be adapted to The arrangement of the intake and exhaust valves; and, the resistance arm is inclined, so that the exhaust push rod drives the exhaust rocker arm 2 to generate no additional torque, thereby ensuring flexibility. In this embodiment, the portion of the combustion chamber surface 13 between the intake valve 5 and the exhaust valve 9 forms a nose bridge region 14 , and the cylinder head body 1 is located outside the nose bridge region 14 and is provided with an air-cooling passage 10 that penetrates up and down; The air-cooling passage greatly improves the cooling effect of the nose bridge region 14, reduces the deformation of the cylinder head at high temperatures, and improves the reliability of the valve seal; and the air-cooling passage 10 penetrates from the top to the bottom, and the vertical axis The cooling wind of the gasoline engine is consistent from the top to the bottom, and does not require additional air guiding settings, and has a better cooling effect. In this embodiment, the combustion chamber surface 13 is a spherical structure or an arched structure composed of a smooth curved surface; in this embodiment, it is an arched structure, the structure has a small surface area ratio, and the squish area is increased, compared with the spherical combustion chamber. , can increase the airflow disturbance, improve the working efficiency of the gasoline engine, and achieve the purpose of reducing fuel consumption and emissions; the intake valve axis and the exhaust valve axis are perpendicular to the intersection of the combustion chamber surface and its intersection; and the intake and exhaust of the combustion chamber The direction is adapted, the resistance is reduced, the efficiency of the gasoline engine is increased, and the power of the gasoline engine is increased. In this embodiment, the angle β between the axis of the intake valve 5 and the axis of the exhaust valve 9 is less than or equal to 30°, which is 30° in this embodiment; ensuring sufficient inclination angle and facilitating the arrangement to ensure intake and The exhaust gas is smooth, and at the same time, the nose bridge region 14 is also ensured to have a sufficient width; the intake rocker arm 8 is disposed on the intake rocker arm seat 6 through the intake rocker arm shaft 7, and the exhaust rocker arm 2 passes through the exhaust rocker arm shaft 3 It is disposed on the exhaust rocker arm seat 4; the axis of the intake valve rocker arm shaft 7 and the axis of the exhaust valve rocker arm shaft 3 are at an angle δ of 45°±20° in the vertical plane, which is 45° in this embodiment; Adapted to the needs of the rocker arm arrangement, avoiding the additional torque generated by the push rod driving the rocker arm, which is beneficial to ensure the coordination, sealing and flexible driving of the rocker arm to move the valve; the rocker arm can be arranged reasonably according to the position of the intake and exhaust valves. It is more conducive to ensuring valve timing and ensuring the phase of the valve, thereby improving performance and reducing emissions. In this embodiment, the intake rocker arm seat 6 and the exhaust rocker arm seat 4 are both open structures, and the two ends of the intake rocker arm shaft 7 are correspondingly inserted into the sides of the opening of the intake rocker arm seat 6 and can be wound around the axis thereof. The rotation mode is matched by a single degree of freedom. The intake rocker arm 8 is fixedly disposed in the opening of the intake rocker arm seat 6 and is disposed on the intake rocker arm shaft 7; the two ends of the exhaust rocker arm shaft 3 are correspondingly inserted into the exhaust rocker arm seat 4 The sides of the opening are matched by a single degree of freedom in a manner of being rotatable about the axis of the exhaust, and the exhaust rocker arm 2 is fixedly disposed in the opening of the exhaust rocker arm 4 to be disposed on the exhaust rocker shaft 3 so as to be rotatable about its own axis. Mode single degree of freedom. The prior art cooperation can be employed, including limiting the axial freedom with the shoulder and the like. During the operation of the fixed rocker arm, the amount of sway or sway in all directions is small, which can effectively reduce the failure rate of the rocker arm and reduce the maintenance cost. It is suitable for the position of the intake and exhaust to properly arrange the rocker arm. Ensure valve timing and ensure valve timing to improve performance and reduce emissions. The present invention also discloses a gasoline engine comprising the aforementioned vertical axis gasoline engine cylinder head assembly mounted on a gasoline engine. The gasoline engine can be used in general machinery, and the general machinery includes a lawn mower, a pump, a fan, a compressor, a downshifting machine, a generator, and the like. The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to be limiting, and the present invention will be described in detail with reference to the preferred embodiments. Modifications or equivalents are intended to be included within the scope of the appended claims.

Claims

Claim

A vertical shaft gasoline engine cylinder head assembly comprising a cylinder head body (1) and an intake passage (12) and an exhaust passage (11) disposed on the cylinder head body (1), the cylinder head On the body (1) and the intake passage

(12) correspondingly provided with an intake valve (5), corresponding to the exhaust passage (11) is provided with an exhaust valve (9), the intake valve (5) corresponding to the intake rocker arm (8) and An intake push rod, the exhaust valve (9) is correspondingly provided with an exhaust rocker arm (2) and an exhaust push rod, and is characterized by: a line connecting the intake valve axis and the exhaust valve axis and an intake push rod axis A line connecting the axis of the exhaust push rod intersects between the intake push rod axis and the exhaust push rod axis.

2. The vertical axis gasoline engine cylinder head assembly according to claim 1, wherein: the top of the intake valve (5) is inclined toward the intake passage (12) side, and the exhaust valve (9) The top is inclined toward the side of the exhaust passage (11).

3. The vertical axis gasoline engine cylinder head assembly according to claim 2, wherein: a line connecting the intake valve axis and the exhaust valve axis with the intake push rod axis and the exhaust The angle between the lines of the push rod axis is 90 ° ± 20 °.

4. The vertical axis gasoline engine cylinder head assembly according to claim 3, wherein: a line connecting the intake valve axis and the exhaust valve axis is perpendicular to the intake push rod axis and the row The connection of the air push rod axis.

5. The vertical axis gasoline engine cylinder head assembly according to claim 4, wherein: a line level of the intake valve axis and the exhaust valve axis, an intake direction of the intake passage, and a The exhaust direction of the exhaust passage is located at a horizontal plane, and the top of the intake valve (5) is inclined to the side of the intake passage (12) in a horizontal direction, and the top of the exhaust valve (9) is oriented horizontally The side of the exhaust passage (11) is inclined.

6. The vertical axis gasoline engine cylinder head assembly according to claim 5, wherein the intake passage (12) is located between the intake push rod and the exhaust push rod, the intake air The length of the rocker arm (8) is shorter than the length of the exhaust rocker arm (2); the resistance arm of the exhaust rocker arm (2) faces the intake valve axis and the exhaust valve in a vertical plane The line of the axis is inclined.

7. The vertical axis gasoline engine cylinder head assembly according to claim 6, wherein: an angle between the intake valve axis and the exhaust valve axis is less than or equal to 30[deg.]; The arm (8) is disposed on the intake rocker arm (6) through the intake rocker shaft (7), and the exhaust rocker arm (2) is disposed through the exhaust rocker shaft (3) Exhaust rocker arm seat (4); the axis of the intake valve rocker arm and the axis of the exhaust valve rocker arm are at an angle of 45° ± 20° in the vertical plane. The vertical axis gasoline engine cylinder head assembly according to claim 7, wherein: the intake rocker arm seat (6) and the exhaust rocker arm seat (4) are both open structures, and the intake air is shaken The two ends of the arm shaft (7) are correspondingly inserted into the sides of the opening of the air intake rocker seat (6) and are fitted with a single degree of freedom in a manner rotatable about the axis thereof, and the air intake rocker arm (8) is located at the The opening of the intake rocker arm (6) is fixedly disposed on the intake rocker shaft (7); the two ends of the exhaust rocker shaft (3) are correspondingly inserted into the exhaust rocker seat (4) Both sides of the opening are matched with a single degree of freedom in a manner of being rotatable about an axis thereof, and the exhaust rocker arm (2) is fixedly disposed in the opening of the exhaust rocker arm (4) to the exhaust rocker arm Axis (3). The vertical axis gasoline engine cylinder head assembly according to any one of claims 1 to 8, characterized in that: the inner side of the cylinder head body (1) forms a combustion chamber surface (13), and the combustion chamber surface (13) A portion between the intake valve (5) and the exhaust valve (9) forms a nose bridge region (14), and the cylinder head body (1) is located above the nose bridge region (14) Through the air cooling channel (10). A gasoline engine comprising a gasoline engine cylinder head assembly mounted on the gasoline engine, characterized in that: the gasoline engine cylinder head is always a vertical shaft gasoline engine cylinder head assembly according to any one of claims 1-9.