阅读说明：本技术 一种点燃式二冲程发动机具有加速扫气作用的缸盖结构 (Cylinder cover structure with accelerated scavenging effect of spark-ignition two-stroke engine ) 是由 王旭兰 王尚学 仲蕾 郝勇刚 白军爱 陈晓飞 王红丽 李旭东 葛玉霞 赵斌 于 2021-09-17 设计创作，主要内容包括：本发明提供了一种点燃式二冲程发动机具有加速扫气作用的缸盖结构,包括壳体,壳体内部为空心圆柱结构,壳体内部均布若干进气口,每个进气口的空腔处设有一个凸筋,凸筋的方向于进气口的进气方向呈夹角。本发明所述的点燃式二冲程发动机具有加速扫气作用的缸盖结构,有效的防止了点燃式二冲程发动机进气困难的问题,降低了工程应用中的风险；本发明对此种结构的点燃式二冲程发动机进气困难的问题皆适用,工艺性较好且成本较低。(The invention provides a cylinder cover structure with an accelerated scavenging effect for a spark-ignition two-stroke engine, which comprises a shell, wherein the interior of the shell is of a hollow cylindrical structure, a plurality of air inlets are uniformly distributed in the shell, a cavity of each air inlet is provided with a convex rib, and the direction of each convex rib forms an included angle with the air inlet direction of each air inlet. The spark-ignition two-stroke engine has the cylinder cover structure with the function of accelerating scavenging, so that the problem of difficult air intake of the spark-ignition two-stroke engine is effectively solved, and the risk in engineering application is reduced; the invention is suitable for the problem that the ignition type two-stroke engine with the structure has difficult air intake, and has better manufacturability and lower cost.)

1. A cylinder cover structure of a spark-ignition two-stroke engine with an accelerating scavenging effect is characterized in that: the air inlet structure comprises a shell, wherein a cavity structure is arranged inside the shell, a plurality of air inlets are uniformly distributed on the outer wall of the cavity structure, a convex rib is arranged at the cavity of each air inlet, and the direction of each convex rib is an included angle with the air inlet direction of each air inlet.

2. A cylinder head structure of a spark ignition two-stroke engine with an accelerated scavenging action according to claim 1, characterized in that: the convex ribs are of a blade-shaped structure.

3. A cylinder head structure of a spark ignition two-stroke engine with an accelerated scavenging action according to claim 1, characterized in that: the quantity of air inlet is 2, and the symmetry sets up in casing both sides.

4. A cylinder head structure of a spark ignition two-stroke engine with an accelerated scavenging action according to claim 1, characterized in that: the cavity structure comprises an integrated upper part, a middle part and a lower part, wherein the upper part is of a cylindrical structure, the middle part is of a semicircular structure, the lower part is of a cylindrical structure, the inner diameter of the lower part is larger than that of the upper part, and a plurality of air inlets are uniformly distributed in the lower part.

Technical Field

The invention belongs to the technical field of internal combustion engines, and particularly relates to a cylinder cover structure of a spark-ignition two-stroke engine with an accelerating scavenging effect.

Background

In a spark-ignition two-stroke engine, the cylinder head has the function of air intake. Due to some special structures, the air inlet of the cylinder cover is limited by the structure and cannot meet the requirement of air inflow, so that the problem of difficult air inflow is caused. Therefore, a cylinder head structure of a spark ignition type two-stroke engine with an accelerated scavenging effect is provided. Researchers have taken various measures to improve the problem of difficulty in intake of two-stroke engines, such as increasing a large intake port, changing the shape of the intake port, and the like. These measures are often not applicable to special configurations of the product, such as where the air inlet cannot be enlarged and where there is no way to change the shape of the air inlet. In order to solve the above-mentioned dilemma, it is necessary to provide a cylinder head structure of a spark-ignition two-stroke engine with an accelerated scavenging function to solve the problem of difficulty in air intake.

Disclosure of Invention

In view of the above, the present invention is directed to a cylinder head structure of a spark-ignition two-stroke engine with an accelerated scavenging effect, so as to solve the problem of difficult air intake of the cylinder head.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a cylinder cover structure with an accelerating scavenging effect of a spark-ignition two-stroke engine comprises a shell, wherein a cavity structure is arranged inside the shell, a plurality of air inlets are uniformly distributed on the outer wall of the cavity structure, a convex rib is arranged at the cavity of each air inlet, and the direction of each convex rib is an included angle with the air inlet direction of each air inlet.

Furthermore, the convex ribs are of a blade-shaped structure.

Furthermore, the number of the air inlets is 2, and the air inlets are symmetrically arranged on two sides of the shell.

Further, the cavity structure comprises an upper portion, a middle portion and a lower portion which are integrated, the upper portion is of a cylindrical structure, the middle portion is of a semicircular structure, the lower portion is of a cylindrical structure, the inner diameter of the lower portion is larger than that of the upper portion, and a plurality of air inlets are evenly distributed in the lower portion.

Compared with the prior art, the cylinder cover structure of the spark-ignition two-stroke engine with the function of accelerating scavenging has the following advantages:

(1) the spark-ignition two-stroke engine has the cylinder cover structure with the function of accelerating scavenging, so that the problem of difficult air intake of the spark-ignition two-stroke engine is effectively solved, and the risk in engineering application is reduced; the invention is suitable for the problem that the ignition type two-stroke engine with the structure has difficult air intake, and has better manufacturability and lower cost.

(2) The spark-ignition two-stroke engine has a cylinder cover structure with an accelerating scavenging effect, and is simple in structure and easy to realize.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a top view of a cylinder head structure with accelerated scavenging of a spark-ignition two-stroke engine according to an embodiment of the present invention;

fig. 2 is a sectional view of a cylinder head structure of a spark-ignition two-stroke engine having an accelerated scavenging action according to an embodiment of the present invention.

Description of reference numerals:

1-convex ribs; 2-air inlet.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

A cylinder cover structure of a spark-ignition two-stroke engine with an accelerating scavenging effect comprises a shell, wherein a cavity structure is arranged in the shell, a plurality of air inlets 2 are uniformly distributed on the outer wall of the cavity structure, a convex rib 1 is arranged at the cavity of each air inlet 2, and the direction of each convex rib 1 is an included angle with the air inlet direction of each air inlet 2.

The cavity structure comprises an integrated upper part, a middle part and a lower part, wherein the upper part is of a cylindrical structure, the middle part is of a semicircular structure, the lower part is of a cylindrical structure, the inner diameter of the lower part is larger than that of the upper part, and a plurality of air inlets 2 are uniformly distributed in the lower part.

The convex rib 1 is of a blade-shaped structure. The inclination direction of the convex rib is designed according to the simulation calculation of the air inlet performance.

Preferably, the number of the air inlets 2 is 2, and the air inlets are symmetrically arranged on two sides of the shell.

When the air inlet 2 of the cylinder cover is used for air inlet, the scavenging of the cylinder cover is accelerated through the convex ribs 1 in the shape of the air inlet blades.

The invention better meets the design requirements in the practical process, and by adopting the design structure, the problem of insufficient air intake of the ignition type two-stroke engine is better solved. The cylinder cover structure with the function of accelerating scavenging effectively prevents the problem of difficult air intake of the spark-ignition two-stroke engine and reduces the risk in engineering application. The invention is suitable for the problem that the ignition type two-stroke engine with the structure has difficult air intake, and has better manufacturability and lower cost.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.