CN204627795U - A kind of Carburetor of two stroke engine - Google Patents
A kind of Carburetor of two stroke engine Download PDFInfo
- Publication number
- CN204627795U CN204627795U CN201520151318.XU CN201520151318U CN204627795U CN 204627795 U CN204627795 U CN 204627795U CN 201520151318 U CN201520151318 U CN 201520151318U CN 204627795 U CN204627795 U CN 204627795U
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- CN
- China
- Prior art keywords
- air
- air inlet
- carburetor
- inlet port
- oil
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- Expired - Fee Related
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Abstract
The utility model relates to a kind of Carburetor of two stroke engine, comprises bypass air inlet port, and this bypass air inlet port connects suction port and oil-feed duct, is provided with the air inlet component with air jet in bypass air inlet port.The diameter of air jet is 0.3-0.6mm, is provided with the high speed screw for adjusting oil mass in oil-feed duct.In air inlet component, air jet both sides are respectively equipped with auxiliary hole, and the aperture of auxiliary hole is greater than the aperture of air jet, and the length of air jet is 0.8-1mm.Bypass air inlet port is made up of the air inclined channel be connected and air straight hole road.Air inlet component is installed in air inclined channel.Sufficient combustion when this model utility solves existing two stroke engine low-speed running, the shortcoming that toxic emission rate is high, has production and assembly easy, effectively can improve the rate of combustion of oil plant, reduces the advantage of toxic emission.
Description
Technical field
The utility model relates to a kind of Carburetor, is especially applied to two-stroke mini engine.
Background technique
Current national Abgasgesetz is more and more stricter, and state-two, state three standard are implemented successively.Day by day remarkable along with road vehicle Exhaust Emission Control effect, and the application of non-road mini engine is increasingly extensive, waste gas one of main source rising to pollution of atmosphere of mini engine discharge.Wherein the discharge of CH is very with two-stroke small-sized universal engine especially.Because two-stroke put-put is the irreplaceable power of numerous Portable agriculture and forestry machineries, contact closely with user, and due to the narrow limitation of two-stroke put-put structure, its exhaust emissions CO, CH, NO
xbe worth all higher, the existing technology path that can adopt of reply Abgasgesetz also and limited, is difficult to the emission limit set requirement reaching regulation.Although and in Carburetor, be provided with bypass air inlet port in prior art, as the patent of CN201310122645, because its air inlet port manufactures complexity, be difficult to accurately control bypass air inflow, what easily cause mixer to burn is insufficient.Therefore improve matching used Carburetor with it, improve mixed gas and enter the atomizing effect of motor, with improve rate of combustion become when business urgently.
Model utility content
The utility model provides a kind of Carburetor of two stroke engine, sufficient combustion when which overcoming existing two-stroke mini engine low-speed running, the shortcoming that toxic emission rate is high, has production and assembly easy, effectively can improve the rate of combustion of oil plant, reduce the advantage of toxic emission.
The technical solution of the utility model is as follows:
A kind of Carburetor of two stroke engine, comprise carburetor body, be provided with in carburetor body connect successively suction port, Venturi duct and air outlet, also be provided with in carburetor body connect successively nozzle assembly, spatial hole and oil-feed duct, Venturi is provided with rotary valve in duct, and nozzle assembly is arranged in rotary valve.Also be provided with bypass air inlet port in carburetor body, this bypass air inlet port one end connects suction port, and the other end connects oil-feed duct by spatial hole, is provided with the air inlet component with air jet in bypass air inlet port.This air inlet component is copper piece, its integrated design, is convenient to the air jet that rapid batch processes same specification, effectively can save production and human cost, and accurately can control air inflow, be beneficial to the Thorough combustion of mixed gas.After the first preliminary mixed aerosol of the design gasoline come in oil-feed duct and the air entered by air jet of bypass air inlet port, the air entered with suction port again secondary in Venturi duct mixes, and mixes sufficient mixed gas and engine combustion can be made more complete.
The diameter of described air jet is 0.3-0.6mm, is provided with the high speed screw for adjusting oil mass in oil-feed duct.Air jet needs to mate with engine performance, unsuitable excessive or too small.Air jet is too small, and air inlet is not enough, burns insufficient, not only wastes oil plant, also can cause the rising of toxic emission rate; Air jet is excessive, can cause the phenomenon that mixed at high speed gas is partially rare, because the proportion of air is less than gasoline, and the phenomenon that air first suction can cause engine speed to rise in engine operation process.Motor is under different operating mode, as air under idling, transition, acceleration, deceleration, full-speed state is different from the ratio demand of fuel oil quality, namely different air fuel ratios (excess air coefficient Φ a numerical value) is needed, the size of air jet can be selected according to the difference of different motor required optimal air-fuel ratio under different operating state, simultaneously by high speed screw 6 adjusting oil mass, and the different amount coordinating rotary valve to rotate, jointly adjust the air fuel ratio of needs, to meet the needs of gasoline combustion.Rational air jet size, can make engine combustion complete, to motor property indices as the indexs such as power, moment of torsion, minimum specific fuel consumption, toxic emission rate all can improve.
In described air inlet component, air jet both sides are respectively equipped with auxiliary hole, and the aperture of auxiliary hole is greater than the aperture of air jet, and the length of air jet is 0.8-1mm.The setting of auxiliary hole is the processing for the ease of intermediate hole.Because intermediate hole is too little, the oversize not easily processing drill in aperture can be easily broken, and hole oversize adding also cannot ensure pore size dimensional stability man-hour, and therefore generally intermediate hole reserves processing length is that 0.8-1mm is advisable.
Described bypass air inlet port is made up of air inclined channel and air straight hole road.One end, air straight hole road is closed, the other end connection space hole.Air inclined channel one end is communicated with the cell walls between two ends, air straight hole road, and the other end connects suction port.Air inlet component is installed in air inclined channel.The design in air inclined channel and air straight hole road, and after allowing air arrive first air straight hole road by air inclined channel, the design of the oil mixing entered with oil-feed duct again overcomes due to limited the caused processing technology difficulty in Carburetor inner space, make the layout of bypass air inlet port more reasonable, air circulation is more smooth and easy, is beneficial to the mixing of oil gas.
When this Carburetor can overcome time of engine low speed, accelerator open degree is little, be vented insufficient, scavenging is incomplete, in firing chamber, incoming mixture concentration is low, the shortcomings such as and part incoming mixture is together discharged with waste gas during scavenging, the mixture combustion easily caused is insufficient, and in waste gas CH compounds content is high.Found by experimental test, the data that this Carburetor is applied on two stroke engine are as follows: in the waste gas of its discharge, CO content is reduced to 612g/kw.h by 785g/kw.h, HC and NO
xtotal value is reduced to 35-40g/kw.h by 60.2g/kw.h, reduce 30-40%, Europe two emission regulation demands can be met, also reach requirement (i.e. CO < 805g/kw.h, HC and NO of the limit value that discharges pollutants that two-stroke lawn mower engine (Chinese second stage) specifies simultaneously
xtotal value < 50g/kw.h).Use Carburetor described in the utility model, the power of equal type can improve 10-15%, and minimum specific fuel consumption is seen and reduced 15-20%.Visible, this Carburetor effectively can improve machine power, improves the rate of combustion of oil plant, reduces toxic emission.
Accompanying drawing explanation
Fig. 1 is the worm's eye view of the Carburetor of two stroke engine described in the utility model
Fig. 2 is the plan view of the Carburetor of two stroke engine described in the utility model
Fig. 3 is the A-A sectional view of the Carburetor of two stroke engine described in the utility model
Fig. 4 is the B-B revolved sectional view of the Carburetor of two stroke engine described in the utility model
Embodiment
Below in conjunction with Figure of description, the technical solution of the utility model is described in detail.
As Figure 1-4, a kind of Carburetor of two stroke engine, comprise carburetor body, be provided with in carburetor body connect successively suction port 2, Venturi duct 5 and air outlet 9, also be provided with in carburetor body connect successively nozzle assembly 7, spatial hole 10 and oil-feed duct 3, be provided with rotary valve 8 in Venturi duct 5, nozzle assembly 7 is arranged in rotary valve 8.Also be provided with bypass air inlet port 1 in carburetor body, this bypass air inlet port 1 one end connects suction port 2, and the other end connects oil-feed duct 3 by spatial hole 10, is provided with the air inlet component 4 with air jet 41 in bypass air inlet port 1.The diameter of air jet 41 is 0.3-0.6mm, is provided with the high speed screw 6 for adjusting oil mass in oil-feed duct 3.In air inlet component 4, air jet 41 both sides are respectively equipped with auxiliary hole 42, and the aperture of auxiliary hole 42 is greater than the aperture of air jet 41, and the length of air jet 41 is 0.8-1mm.Bypass air inlet port 1 is made up of air inclined channel 11 and air straight hole road 12.One end, air straight hole road 12 is closed, the other end connection space hole 10.Air inclined channel 11 one end is communicated with the cell walls between two ends, air straight hole road 12, and the other end connects suction port 2.Air inlet component 4 is installed in air inclined channel 11.
The working procedure of the Carburetor of two stroke engine described in the utility model is as follows:
1. the air after air filter of engine filters is divided into two-way through suction port 2, and a road directly enters in Venturi duct 5, and another road enters in bypass air inlet port 1;
2. enter the air in bypass air inlet port 1, successively by the air inclined channel 11 that is connected and air straight hole road 12, first mixed gas is formed, in the Venturi duct 5 that the inverted-triangular breach 71 of nozzle assembly 7 sprays into after the gasoline by entering oil inlet hole road 3 after high speed screw 6 adjusting oil mass mixes at spatial hole 10 place;
3. make to form turbulent flow in Venturi duct 5 by rotating rotary valve 8, first mixed gas is broken up into more tiny particle by the high-speed air air-flow directly entered in Venturi duct 5, forms secondary mixed gas, reaches the ideal effect be again atomized;
4. two mixed gass enter motor through air outlet 9.
The carburetor structure of two stroke engine described in the utility model has more than and is only confined to above-described embodiment, and every any improvement according to the utility model principle or replacement, all should within protection domain of the present utility model.
Claims (5)
1. the Carburetor of a two stroke engine, comprise carburetor body, be provided with in carburetor body connect successively suction port (2), Venturi duct (5) and air outlet (9), also be provided with in carburetor body connect successively nozzle assembly (7), spatial hole (10) and oil-feed duct (3), be provided with rotary valve (8) in Venturi duct (5), nozzle assembly (7) is arranged in rotary valve (8); Bypass air inlet port (1) is also provided with in carburetor body, this bypass air inlet port (1) one end connects suction port (2), the other end connects oil-feed duct (3) by spatial hole (10), it is characterized in that: be provided with the air inlet component (4) with air jet (41) in bypass air inlet port (1).
2. the Carburetor of two stroke engine according to claim 1, is characterized in that: the diameter of described air jet (41) is 0.3-0.6mm, is provided with the high speed screw (6) for adjusting oil mass in oil-feed duct (3).
3. the Carburetor of two stroke engine according to claim 1 and 2, it is characterized in that: in described air inlet component (4), air jet (41) both sides are respectively equipped with auxiliary hole (42), the aperture of auxiliary hole (42) is greater than the aperture of air jet (41), and the length of air jet (41) is 0.8-1mm.
4. the Carburetor of two stroke engine according to claim 1 and 2, is characterized in that: described bypass air inlet port (1) is made up of air inclined channel (11) and air straight hole road (12); Air straight hole road (12) one end is closed, the other end connection space hole (10); Air inclined channel (11) one end is communicated with the cell walls be positioned between air straight hole road (12) two ends, and the other end connects suction port (2); Air inlet component (4) is installed in air inclined channel (11).
5. the Carburetor of two stroke engine according to claim 3, is characterized in that: described bypass air inlet port (1) is made up of air inclined channel (11) and air straight hole road (12); Air straight hole road (12) one end is closed, the other end connection space hole (10); Air inclined channel (11) one end is communicated with the cell walls be positioned between air straight hole road (12) two ends, and the other end connects suction port (2); Air inlet component (4) is installed in air inclined channel (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151318.XU CN204627795U (en) | 2015-03-17 | 2015-03-17 | A kind of Carburetor of two stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520151318.XU CN204627795U (en) | 2015-03-17 | 2015-03-17 | A kind of Carburetor of two stroke engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204627795U true CN204627795U (en) | 2015-09-09 |
Family
ID=54046833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520151318.XU Expired - Fee Related CN204627795U (en) | 2015-03-17 | 2015-03-17 | A kind of Carburetor of two stroke engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204627795U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523191A (en) * | 2016-08-24 | 2017-03-22 | 福建省福鼎市金星通用机化油器有限公司 | Plastic carburetor |
-
2015
- 2015-03-17 CN CN201520151318.XU patent/CN204627795U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523191A (en) * | 2016-08-24 | 2017-03-22 | 福建省福鼎市金星通用机化油器有限公司 | Plastic carburetor |
| CN106523191B (en) * | 2016-08-24 | 2018-12-21 | 福建省福鼎市金星通用机化油器有限公司 | A kind of plastics carburetor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150909 Termination date: 20200317 |