阅读说明：本技术 一种分层扫气活塞 (Layered scavenging piston ) 是由 杨慧明 刘晓庆 陈军 于 2020-06-02 设计创作，主要内容包括：本发明公开了一种分层扫气活塞,包括活塞,所述活塞的侧面上端设有环形槽,所述活塞的侧面上端设有两个对称设置的辅助扫气凹槽,活塞与辅助扫气凹槽对应的侧面下端设有两个对称设置的扫气凹槽,扫气凹槽的内部设有水平穿插活塞的柱形槽,且两个扫气凹槽通过柱形槽连通,且柱形槽的中部与活塞底部连通,且柱形槽的内部活动穿插有活塞销,活塞的侧面上端设有第二凹槽,且活塞的侧面下端设有两个对称设置的第一凹槽。该分层扫气活塞,结构简单,通过增加第一凹槽和第二凹槽可以减少未燃烧的燃油混合气直接随排气排出,提高燃油效率,从而降低油耗比例,降低废气排放,还可以节省催化剂,降低成本,使用方便。(The invention discloses a layered scavenging piston which comprises a piston, wherein an annular groove is formed in the upper end of the side surface of the piston, two auxiliary scavenging grooves which are symmetrically arranged are formed in the upper end of the side surface of the piston, two scavenging grooves which are symmetrically arranged are formed in the lower end of the side surface of the piston, which corresponds to the auxiliary scavenging grooves, the scavenging grooves are internally provided with cylindrical grooves, the pistons are horizontally inserted in the scavenging grooves, the two scavenging grooves are communicated through the cylindrical grooves, the middle parts of the cylindrical grooves are communicated with the bottom of the piston, piston pins are movably inserted in the cylindrical grooves, second grooves are formed in the upper end of the side surface of the piston, and two first grooves which are symmetrically arranged are formed in the lower end. This layering scavenging piston, simple structure can reduce the direct exhaust along with the exhaust of the fuel gas mixture that unburnt through increasing first recess and second recess, improves fuel efficiency to reduce the oil consumption proportion, reduce exhaust emissions, can also save the catalyst, reduce cost, convenient to use.)

1. The layered scavenging piston comprises a piston (8), wherein an annular groove (7) is formed in the upper end of the side surface of the piston (8), and the layered scavenging piston is characterized in that: the piston type air-conditioner is characterized in that two auxiliary scavenging grooves (2) which are symmetrically arranged are formed in the upper end of the side face of the piston (8), two scavenging grooves (4) which are symmetrically arranged are formed in the lower end of the side face of the piston (8) corresponding to the auxiliary scavenging grooves (2), a cylindrical groove for horizontally inserting the piston (8) is formed in the scavenging grooves (4), the two scavenging grooves (4) are communicated through the cylindrical groove, the middle of the cylindrical groove is communicated with the bottom of the piston (8), and a piston pin (3) is movably inserted in the cylindrical groove;

the upper end of the side surface of the piston (8) is provided with a second groove (6), and the lower end of the side surface of the piston (8) is provided with two first grooves (5) which are symmetrically arranged.

2. The layered scavenging piston of claim 1, characterized in that: the first groove (5) is communicated with the scavenging groove (4).

3. The layered scavenging piston of claim 1, characterized in that: the first groove (5) and the scavenging groove (4) are positioned at the same height.

4. The layered scavenging piston of claim 1, characterized in that: the second groove (6) and the auxiliary scavenging groove (2) are positioned at the same height.

Technical Field

The invention relates to the technical field of internal combustion engines, in particular to a layered scavenging piston.

Background

The operating cycle of a two-stroke internal combustion engine is completed in two piston strokes, i.e., one revolution of the crankshaft. In a four-stroke internal combustion engine, the exhaust process and the intake process are often collectively referred to as a scavenging process. The scavenging process in a two-stroke internal combustion engine refers to the process in which exhaust gases are swept from the cylinder and replaced by fresh air. The operating cycles of these two internal combustion engines differ primarily in the gas exchange process. The emissions requirements for two-cycle gasoline engines meet the national two-stage emissions requirements and the European Union two-stage emissions requirements and the EPA requirements for North American regions.

With the increasing emission requirements of the existing regulations, the emission value of the traditional intake scavenging engine is higher, and the emission value is generally reduced by using a catalyst. However, when the engine works in the mode, the fuel consumption ratio is large, and more catalysts are needed, so that the cost is increased.

Disclosure of Invention

The invention aims to overcome the existing defects and provide a layered scavenging piston, which can reduce the direct discharge of unburned fuel mixture along with exhaust by adding a first groove and a second groove, improve the fuel efficiency, reduce the fuel consumption proportion and the exhaust emission, save a catalyst, reduce the cost, is convenient to use and can effectively solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a layering scavenging piston, includes the piston, the side upper end of piston is equipped with the ring channel, the side upper end of piston is equipped with the supplementary scavenging recess that two symmetries set up, the side lower extreme that the piston corresponds with supplementary scavenging recess is equipped with the scavenging recess that two symmetries set up, the inside of scavenging recess is equipped with the cylindrical recess that the level alternates the piston, and two scavenging recesses pass through the cylindrical recess intercommunication, and the middle part and the piston bottom intercommunication in cylindrical recess, and the inside activity interlude of cylindrical recess has the piston pin.

The side upper end of piston is equipped with the second recess, and the side lower extreme of piston is equipped with two first recesses that the symmetry set up.

As a preferable aspect of the present invention, the first groove communicates with the scavenging groove.

As a preferable technical solution of the present invention, the first groove and the scavenging groove are located at the same height.

As a preferable technical solution of the present invention, the second groove and the auxiliary scavenging groove are located at the same height.

Compared with the prior art, the invention has the beneficial effects that:

the layered scavenging piston disclosed by the invention has a simple structure, and the addition of the first groove and the second groove can reduce the direct discharge of unburned fuel mixture along with exhaust, thereby improving the fuel efficiency, reducing the fuel consumption ratio and the exhaust emission, saving the catalyst, reducing the cost and being convenient to use.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic sectional view of the bottom view of the present invention.

In the figure: 1 scavenging channel, 2 auxiliary scavenging groove, 3 piston pin, 4 scavenging groove, 5 first groove, 6 second groove, 7 ring groove, 8 piston.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a layering scavenging piston, including piston 8, piston 8's side upper end is equipped with ring channel 7, piston 8's side upper end is equipped with two symmetry settings's supplementary scavenging recess 2, the side lower extreme that piston 8 and supplementary scavenging recess 2 correspond is equipped with two symmetry settings's scavenging recess 4, scavenging recess 4's inside is equipped with the cylindrical slot that the level alternates piston 8, and two scavenging recesses 4 pass through the cylindrical slot intercommunication, and the middle part and the piston 8 bottom intercommunication in cylindrical slot, and the inside activity interlude in cylindrical slot has piston pin 3, be used for connecting outside connecting rod and piston 8.

The upper end of the side surface of the piston 8 is provided with a second groove 6, and the second groove 6 and the auxiliary scavenging groove 2 are positioned at the same height.

And the side lower extreme of piston 8 is equipped with two first recesses 5 that the symmetry set up, and first recess 5 and scavenge air recess 4 intercommunication, first recess 5 and scavenge air recess 4 are located same height.

Fresh air participates in engine scavenging through the cooperation of the second groove 6, the first groove 5, the pair of scavenging grooves 4 and the pair of auxiliary scavenging grooves 2, and therefore layered scavenging of air scavenging and fuel mixture is achieved.

Whole layering scavenging piston, simple structure can reduce the direct exhaust along with the exhaust of the fuel gas mixture that unburnt through increasing first recess 5 and second recess 6, improves fuel efficiency to reduce the oil consumption proportion, reduce exhaust emission, can also save catalyst, reduce cost, convenient to use.

According to the invention, by adding the first groove 5 and the second groove 6, unburned fuel mixed gas can be reduced to be directly discharged along with exhaust, and the fuel efficiency is improved, so that the fuel consumption proportion is reduced, the exhaust emission is reduced, a catalyst can be saved, the cost is reduced, and the use is convenient.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.