CN210829524U

CN210829524U - Structure capable of increasing air-fuel ratio of two-stroke internal combustion engine

Info

Publication number: CN210829524U
Application number: CN201921484476.1U
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: 2020-06-23
Anticipated expiration: 2029-09-06

Abstract

The utility model discloses a can increase two-stroke internal-combustion engine air-fuel ratio structure, including spark plug cylinder and piston, spark plug movable mounting is at the top of cylinder, piston movable mounting is in the inside of cylinder, the bottom of cylinder is equipped with the crankcase rather than the intercommunication, the bottom activity of piston is equipped with crankshaft connecting rod assembly, and one side middle part of crankcase is equipped with empty filter, and the inboard that the crankcase corresponds with empty filter is equipped with the reed check valve, and the side of empty filter is equipped with the pure air inlet with the inside intercommunication of crankcase. The structure capable of increasing the air-fuel ratio of the two-stroke internal combustion engine reduces about 1/4 of incompletely combusted waste gas, and prolongs the service life of the engine; meanwhile, the complexity of parts is simplified, parts such as a cylinder, a piston and an air filter do not need to be redesigned, the parts can be used commonly with parts of a traditional two-stroke internal combustion engine, and later-stage maintenance and maintenance are facilitated.

Description

Structure capable of increasing air-fuel ratio of two-stroke internal combustion engine

Technical Field

The utility model relates to a two-stroke piston internal-combustion engine technical field specifically is a can increase two-stroke internal-combustion engine air-fuel ratio 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 internal combustion engine on the market at present has the following defects: 1. incomplete combustion of exhaust gas; 2. the pollution is large; 3. the noise is high; 4. the service life is short.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide one kind and can increase two-stroke internal-combustion engine air-fuel ratio structure, improve at the air intake in-process, divided into two steps with the air intake stroke, improved the air-fuel ratio, can reach the best air-fuel ratio when making the gas mixture participate in the burning in the cylinder to improve the thermal efficiency of engine, the problem among the background art can effectively be solved in the emission of reduction of pollutants.

In order to achieve the above object, the utility model provides a following technical scheme: the structure capable of increasing the air-fuel ratio of the two-stroke internal combustion engine comprises a spark plug, a cylinder and a piston, wherein the spark plug is movably arranged at the top of the cylinder, the piston is movably arranged in the cylinder, a crankcase body communicated with the cylinder is arranged at the bottom of the cylinder, a crankshaft connecting rod assembly is movably arranged at the bottom of the piston, an air filter is arranged in the middle of one side of the crankcase body, and a reed one-way valve is arranged on the inner side, corresponding to the air filter, of the crankcase body.

As an optimized technical scheme of the utility model, the side upper end of cylinder is equipped with the exhaust gas vent.

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

As an optimized technical proposal of the utility model, the top of the piston is provided with a scavenging port.

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.

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

1. the utility model discloses can increase two-stroke internal-combustion engine air-fuel ratio structure, used the structure that can change the air-fuel ratio, reduced about 1/4 the waste gas of complete combustion not, so the waste gas of emission does not need subsequent processing nearly just can directly discharge, perhaps only needs a small amount of catalyst to handle the back and just can discharge, so the temperature of waste gas can not rise again yet, therefore the heat load of engine can not increase yet, has prolonged the life of engine.

2. The utility model discloses can increase two-stroke internal-combustion engine air-fuel ratio structure, simplify spare part's complexity, need not redesign spare parts such as cylinder, piston, intake pipe, can carry out generally with traditional two-stroke internal-combustion engine's spare part, the maintenance and the maintenance in the later stage of being convenient for.

Drawings

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

fig. 2 is a schematic structural diagram of the first air intake process step of the present invention.

FIG. 3 is a schematic structural diagram of step two of the air intake process of the present invention

In the figure: 1 spark plug, 2 cylinders, 3 pistons, 4 crankshaft connecting rod assemblies, 5 air filters, 6 reed one-way valves and 7 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. 1-3, the present invention provides a technical solution: the utility model provides a can increase two-stroke internal-combustion engine air-fuel ratio structure, includes spark plug 1, cylinder 2 and piston 3, spark plug 1 movable mounting is at the top of cylinder 2, and piston 3 movable mounting is in the inside of cylinder 2, and the side upper end of cylinder 2 is equipped with the waste gas exhaust mouth, and the side lower extreme of cylinder 2 is equipped with the gas mixture air inlet, the entering of the gas mixture of being convenient for.

The bottom of the cylinder 2 is provided with a crankcase body 7 communicated with the cylinder, the bottom of the piston 3 is movably provided with a crankshaft connecting rod assembly 4, the top of the piston 3 is provided with a scavenging port, the middle part of one side of the crankcase body 7 is provided with an air filter 5, and the inner side of the crankcase body 7 corresponding to the air filter 5 is provided with a reed one-way valve 6, so that air can only enter the crankcase body 7 in one way.

The side surface of the air filter 5 is provided with a pure air inlet communicated with the inside of the crankcase body 7, so that air can enter conveniently; the air-fuel ratio of the whole structure capable of increasing the air-fuel ratio of the two-stroke internal combustion engine can be changed, about 1/4 of incompletely combusted waste gas is reduced, so that the discharged waste gas can be directly discharged without subsequent treatment or can be discharged after treatment of a small amount of catalyst, the temperature of the waste gas cannot be increased, the heat load of the engine cannot be increased, and the service life of the engine is prolonged.

Meanwhile, the whole air-fuel ratio structure of the two-stroke internal combustion engine can be increased, related parts such as the cylinder 2, the piston 3 and the air filter 5 do not need to be redesigned, most parts can be used commonly with the traditional two-stroke internal combustion engine, the complexity of the whole engine is reduced, the research and development cost is greatly reduced, the structure is simple, the later maintenance is facilitated, and the cost is saved.

When in use:

an intake stroke: step one, as the piston 3 moves upwards from the lower dead point, the scavenging port is closed, the exhaust port is opened, the gas mixture inlet is not opened, the pressure in the crankcase 7 is reduced, the reed one-way valve 6 is opened, and pure air enters the crankcase 7; and step two, as the piston 3 continues to move upwards, the gas mixture inlet is opened, the reed one-way valve 6 is closed, the waste gas exhaust port is closed, the gas mixture enters the crankcase body 7 through the gas mixture inlet on the cylinder 2 and is mixed with pure air originally entering the crankcase body 7 again, the air-fuel ratio is improved, the gas mixture can reach the optimal air-fuel ratio when participating in combustion in the cylinder 2, and therefore the heat efficiency of the engine is improved, and the emission of pollutants is reduced.

Compression stroke: the piston 3 moves further upward, compressing the combustible mixture while closing the exhaust gas outlet.

And (3) power stroke: when the piston 3 reaches the top dead center, the ignition plug 1 ignites the gas mixture, the energy generated by the combustion of the combustible mixture pushes the piston 3 downward, then the pure air intake port is closed, and the combustible mixture in the crankcase 7 is compressed.

Exhaust stroke: when the piston 3 moves downward, the exhaust port is initially opened and hot exhaust gas begins to be discharged. As the piston 3 moves, the scavenging port opens and through the scavenging port, the compressed combustible mixture enters the cylinder 2 and the remaining exhaust gases are expelled from the cylinder 2.

The utility model uses the structure capable of changing the air-fuel ratio, reduces about 1/4 waste gas which is not completely combusted, so the discharged waste gas can be directly discharged without subsequent treatment, or can be discharged after being treated by a small amount of catalyst, so the temperature of the waste gas can not rise, the heat load of the engine can not be increased, and the service life of the engine is prolonged; meanwhile, the complexity of parts is simplified, the parts such as the cylinder 2, the piston 3, the air filter 5 and the like do not need to be redesigned, and the two-stroke internal combustion engine can be used universally with the parts of the traditional two-stroke internal combustion engine, and is convenient for later maintenance and maintenance.

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. A structure capable of increasing the air-fuel ratio of a two-stroke internal combustion engine including an ignition plug (1), a cylinder (2), and a piston (3), characterized in that: the spark plug (1) is movably mounted at the top of the cylinder (2), the piston (3) is movably mounted inside the cylinder (2), a crank case body (7) communicated with the cylinder (2) is arranged at the bottom of the cylinder (2), a crank connecting rod assembly (4) is movably arranged at the bottom of the piston (3), an air filter (5) is arranged in the middle of one side of the crank case body (7), and a reed one-way valve (6) is arranged on the inner side of the crank case body (7) corresponding to the air filter (5).

2. The structure capable of increasing the air-fuel ratio of a two-stroke internal combustion engine according to claim 1, characterized in that: and an exhaust gas outlet is formed in the upper end of the side surface of the cylinder (2).

3. The structure capable of increasing the air-fuel ratio of a two-stroke internal combustion engine according to claim 1, characterized in that: and a gas mixture inlet is formed in the lower end of the side surface of the cylinder (2).

4. The structure capable of increasing the air-fuel ratio of a two-stroke internal combustion engine according to claim 1, characterized in that: and a scavenging port is arranged at the top of the piston (3).

5. The structure capable of increasing the air-fuel ratio of a two-stroke internal combustion engine according to claim 1, characterized in that: and a pure air inlet communicated with the interior of the crankcase body (7) is formed in the side surface of the air filter (5).