CN211008854U

CN211008854U - Novel layering scavenging structure

Info

Publication number: CN211008854U
Application number: CN201921475302.9U
Authority: CN
Inventors: 杨慧明; 何涛涛; 谢晶
Original assignee: Zhejiang Painier Technology Inc
Current assignee: Zhejiang Painier Technology Inc
Priority date: 2019-09-06
Filing date: 2019-09-06
Publication date: 2020-07-14
Anticipated expiration: 2029-09-06

Abstract

The utility model discloses a novel layering scavenging structure, including spark plug, crankcase, cylinder, piston and crankshaft connecting rod assembly, spark plug movable mounting is at the top of cylinder, piston movable mounting is in the inside of cylinder, the installation of cylinder is on the crankcase to through intercommunication in scavenging passageway and the crankcase, crankshaft connecting rod assembly installs on the crankcase, the cylinder side is equipped with the carburetor, one side middle part that the carburetor was kept away from to the crankcase is equipped with empty filter, the crankcase is equipped with the reed check valve with the inboard that empty filter corresponds. This novel layering scavenging structure need not redesign relevant spare parts such as cylinder, piston, carburetor, empty filter, and most spare parts can be general with in the traditional two-stroke, have reduced the complexity of complete machine, the research and development expense that has significantly reduced, simple structure has also made things convenient for later maintenance, practices thrift the cost.

Description

Novel layering scavenging structure

Technical Field

The utility model relates to a two-stroke piston internal-combustion engine technical field specifically is a novel layering scavenging structure.

Background

The local emission standards are different depending on the regulations of each country and region. Recently, international emission standards have become more stringent. In the market, the requirements of the emission standards can hardly be met by common traditional two-stroke internal combustion engines, and in order to meet the latest emission standards, a four-stroke internal combustion engine with better fuel economy is used by a plurality of enterprises to replace the two-stroke internal combustion engine; the light weight, high power output and greater availability of two-stroke engines still have great advantages in some markets.

The two-stroke stratified scavenging internal combustion engine on the market at present has the following defects; 1. The complexity of the cylinder is increased because a pure air inlet needs to be added on the cylinder; 2. related parts such as a cylinder, a piston, a carburetor, an air filter and the like need to be redesigned, so that the complexity of the whole machine is increased, and the cost is greatly increased; 3. because the structure is more complicated, compact, lead to later maintenance, the maintenance cost increases.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a novel layering scavenging structure, need not redesign relevant spare parts such as cylinder, piston, carburetor, empty filter, most spare parts can be general with traditional two-stroke in, have reduced the complexity of complete machine, the research and development expense that has significantly reduced, simple structure has also made things convenient for later maintenance, practices thrift the cost, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a novel layering scavenging structure, includes spark plug, crankcase, cylinder, piston and crankshaft connecting rod assembly, spark plug movable mounting is at the top of cylinder, piston movable mounting is in the inside of cylinder, the installation of cylinder is on the crankcase to through the intercommunication in scavenging passage and the crankcase, crankshaft connecting rod assembly installs on the crankcase, the cylinder side is equipped with the carburetor, one side middle part that the carburetor was kept away from to the crankcase is equipped with empty filter, the crankcase is equipped with the reed check valve with the inboard that empty filter corresponds.

As an optimized technical scheme of the utility model, the side of empty filter is equipped with the pure air inlet with the inside intercommunication of crankcase body.

As an optimized technical scheme of the utility model, the side of carburetor is equipped with the gas mixture air inlet with the cylinder intercommunication.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses the novel layering scavenging structure of example improves on the basis of traditional two-stroke internal-combustion engine, redesigns the mode of admitting air, scavenging, makes two-stroke internal-combustion engine in the scavenging process, produces twice and admits air and scavenging, compresses the gas mixture through the piston at last to ignite the gas mixture through the spark plug.

2. The utility model discloses the novel layering scavenging structure of example does not need relevant spare parts such as redesign cylinder, piston, carburetor, empty filter, and most spare parts can be general with in the traditional two-stroke, has reduced the complexity of complete machine, the research and development expense that has significantly reduced, simple structure has also made things convenient for later maintenance, practices thrift the cost.

Drawings

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

FIG. 2 is a diagram of the working process of the present invention;

fig. 3 is a timing diagram of the structure of the present invention.

In fig. 1: 1 spark plug, 2 cylinders, 3 pistons, 4 crankshaft connecting rod assemblies, 5 air filters, 6 reed one-way valves, 7 carburetors and 8 crankcase bodies.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: the utility model provides a novel layering scavenging structure, includes spark plug 1, crankcase 8, cylinder 2, piston 3 and crankshaft connecting rod assembly 4, its characterized in that: the spark plug 1 is movably arranged at the top of the cylinder, the piston 3 is movably arranged in the cylinder 2, the cylinder 2 is arranged on a crankcase body 8 and is communicated with the inside of the crankcase body 8 through a scavenging channel, a crankshaft connecting rod assembly 4 is arranged on the crankcase body 8, a carburetor 7 is arranged on the side surface of the cylinder 2, an air filter 5 is arranged in the middle of one side of the crankcase body 8, which is far away from the carburetor 7, a reed one-way valve 6 is arranged on the inner side of the crankcase body 8, which corresponds to the air filter 5, the pressure in the crankcase body 8 is reduced, the reed one-way valve 6 of a pure air inlet is opened, fresh air enters the crankcase body 8 from the pure air inlet, a pure air inlet communicated with the inside of the crankcase body 8 is arranged on the side surface of the air filter 5, a gas mixture inlet communicated with the cylinder 2 is arranged on the, the air inlet and scavenging modes are redesigned, so that the two-stroke internal combustion engine generates two times of air inlet and scavenging in the scavenging process, finally, the gas mixture is compressed through the piston 3, and the gas mixture is ignited through the spark plug 1.

Whole novel layering scavenging structure need not redesign relevant spare parts such as cylinder 2, piston 3, carburetor 7, empty filter 5, and most spare parts can be general with in the traditional two-stroke, have reduced the complexity of complete machine, the research and development expense that has significantly reduced, simple structure has also made things convenient for later maintenance, practices thrift the cost.

When in use:

stage one, the piston 3 moves upward from the bottom dead center: the scavenging port is closed, the air inlet is not opened, the exhaust port is opened, the pressure in the crankcase body 8 is reduced, the reed one-way valve 6 of the pure air inlet is opened, and fresh air enters the crankcase body 8 from the pure air inlet; the pressure in the cylinder 2 starts to increase and the residual exhaust gas and part of the fresh air continue to be discharged from the exhaust gas outlet.

And stage two, the piston 3 continues to move to the top dead center: the gas mixture inlet starts to be opened, and because the negative pressure in the crankcase body 8 is insufficient, the reed one-way valve 6 of the pure air inlet is closed, and the waste gas outlet is closed; pure air stops entering the crankcase 8, the gas mixture starts entering the crankcase 8 from the gas mixture inlet, the gas mixture entering the cylinder 2 starts to be compressed and then ignited.

And step three, the piston 3 moves downwards from the upper dead point, and the exhaust gas outlet is opened: the scavenging port is not opened, and the gas mixture inlet and the pure air inlet are closed; most of the burned exhaust gas is discharged out of the cylinder 2 through the exhaust gas discharge port, and the pressure in the crankcase 8 increases.

And step four, the piston 3 continues to move downwards: the scavenging port starts to be opened, the waste gas outlet is kept opened, and the gas mixture inlet and the pure air inlet are closed; pure air in the crankcase body 8 close to the scavenging passage enters the cylinder 2 through the scavenging passage and extrudes the residual exhaust gas in the cylinder out of the cylinder 2 after combustion.

The piston 3 continues to move downwards until the bottom dead center is reached; the scavenging port is kept open, the exhaust port is kept open, and the gas mixture inlet and the pure air inlet are closed; the pressure in the crankcase 8 continuously increases and the mixed gas in the crankcase 8 starts to enter the cylinder 2 through the scavenging passage, so that a small amount of residual exhaust gas and most of pure air in the cylinder 2 are extruded out of the cylinder 2.

The utility model is improved on the basis of the traditional two-stroke internal combustion engine, redesigns the air intake and scavenging modes, and leads the two-stroke internal combustion engine to generate twice air intake and scavenging in the scavenging process, and finally compresses the gas mixture through the piston 3 and ignites the gas mixture through the spark plug 1; related parts such as the cylinder 2, the piston 3, the carburetor 7, the air filter 5 and the like do not need to be redesigned, most of the parts can be used in the traditional two-stroke process, the complexity of the whole machine is reduced, the research and development cost is greatly reduced, the structure is simple, the later maintenance is facilitated, and the cost is saved.

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.

Claims

1. The utility model provides a novel layering scavenging structure, includes spark plug (1), crankcase body (8), cylinder (2), piston (3), crankshaft connecting rod assembly (4), its characterized in that: the spark plug (1) is movably mounted at the top of the cylinder, the piston (3) is movably mounted inside the cylinder (2), the cylinder (2) is mounted on the crankcase body (8) and communicated with the inside of the crankcase body (8) through a scavenging channel, the crankshaft connecting rod assembly (4) is mounted on the crankcase body (8), a carburetor (7) is arranged on the side face of the cylinder (2), an air filter (5) is arranged in the middle of one side, away from the carburetor (7), of the crankcase body (8), and a reed one-way valve (6) is arranged on the inner side, corresponding to the air filter (5), of the crankcase body (8).

2. The novel layered scavenging structure according to claim 1, characterized in that: and a pure air inlet communicated with the interior of the crankcase body (8) is formed in the side surface of the air filter (5).

3. The novel layered scavenging structure according to claim 1, characterized in that: and a gas mixture inlet communicated with the cylinder (2) is formed in the side surface of the carburetor (7).