CN102080609A - Carburetor for all-purpose gasoline engine - Google Patents
Carburetor for all-purpose gasoline engine Download PDFInfo
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- CN102080609A CN102080609A CN 201110044092 CN201110044092A CN102080609A CN 102080609 A CN102080609 A CN 102080609A CN 201110044092 CN201110044092 CN 201110044092 CN 201110044092 A CN201110044092 A CN 201110044092A CN 102080609 A CN102080609 A CN 102080609A
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Abstract
The invention provides a carburetor for an all-purpose gasoline engine, wherein a carburetor main body is provided with a throat, a floater chamber and a main orifice, wherein a throttle valve is arranged in the throat; the main orifice is communicated with the floater chamber; a main spraying pipe is arranged in the main orifice; a plunger guide hole and a pneumatic control chamber are arranged on the carburetor main body; the plunger guide hole and the main orifice are arranged face to face; a plunger is arranged in the plunger guide hole; the plunger is connected to a gasoline needle; one end of the gasoline needle is inserted into the main spraying pipe; the plunger is connected to a return spring; the pneumatic control chamber is divided into a first chamber and a second chamber by a vacuum diaphragm; the plunger is connected to the vacuum diaphragm; the first chamber is formed between the vacuum diaphragm and the end cover of the pneumatic control chamber and is communicated with the throat; and the second chamber is communicated with the atmosphere. According to the technical scheme of the invention, gasoline can be atomized with the optimum atomized effect, the purpose of adjusting the concentration of a combustible gas mixture for meeting the working requirement of the engine is achieved, the engine emission is lowered, and the all-purpose gasoline engine can be reliably started under various conditions.
Description
Technical field
The invention belongs to the general-purpose petrol engine technical field, specifically, relate to the general-purpose petrol engine Carburetor.
Background technique
Because applying working condition and maneuverability pattern is different, existing common general-purpose petrol engine Carburetor is compared with the Carburetor of motor car engines such as automobile, motorcycle, structurally mainly contain following characteristics: one, aditus laryngis, metering-orifice and the jet size on the Carburetor body all is changeless, and be also non-adjustable in the use; Two, do not have the enriching of startup system, for guaranteeing smooth startup, also be provided with chock plate in the trunnion of Carburetor body except that closure, chock plate is closed during startup, and chock plate was opened after startup was finished, and regulated air inflow by the aperture of closure; Three, closure directly is connected with speed-regulating rack with the closure spring by throttle rod, is mechanical speed governors.
From above some as can be seen, though existing general-purpose petrol engine Carburetor is simple in structure, low cost of manufacture, but because the diameter of aditus laryngis, metering-orifice and jet pipe is changeless, though can guarantee fuel-saving environmental protection target under some operating mode by adjustment in advance, but can not be implemented in the gas concentration and the atomizing effect that all reach best under the various operating modes, therefore generally speaking fuel consume is generally higher, discharging is not very desirable, and is especially especially true under the operating conditions more complicated of general gasoline engines and situation about often changing; In addition, gasoline and air mass flow during Carburetor work all increase with throttle opening, but because the speed difference that both increase, the speed that the speed that the gasoline flow increases increases greater than air mass flow, increase along with throttle opening, the mixed gas that Carburetor provides is then more and more denseer, can not satisfy the actual requirement of motor to air fuel ratio.
Along with the gradually attention of society to environmental protection, country is also more and more higher to the emission request of general-purpose petrol engine, and the structure of existing general-purpose petrol engine Carburetor can not satisfy the energy-conserving and environment-protective requirement of present country.Therefore, be necessary the structure of existing general-purpose petrol engine Carburetor is improved,, make it the gas concentration and the atomizing effect that under various operating modes, all reach best not changing its Environmental Conditions and controlling under the prerequisite of custom.
Summary of the invention
The purpose of this invention is to provide a kind of can automatically adjusting, make it under various operating modes, all can reach best gas concentration and atomizing effect, and then obviously reduce discharging, realize the general-purpose petrol engine Carburetor of energy-conserving and environment-protective target according to various working conditions.
For realizing above-mentioned technical purpose, the invention provides a kind of general-purpose petrol engine Carburetor, the Carburetor body is provided with trunnion, float chamber and main jet, is provided with closure in the trunnion, main jet communicates with float chamber, the main jet pipe is installed in the main jet, is provided with the gentle pressure-controlled of plunger guide hole chamber on the Carburetor body, the plunger guide hole is relative with main jet, be provided with plunger in the plunger guide hole, be connected with spindle on the plunger, an end of spindle stretches in the main jet pipe, and plunger links to each other with return spring; The air pressure control chamber is divided into first chamber and second chamber by the vacuum diaphragm, and plunger links to each other with the vacuum diaphragm, and formed first chamber communicates with aditus laryngis between vacuum diaphragm and the air pressure control chamber end cap, and second chamber communicates with atmosphere.
During work, plunger and spindle are with the vacuum diaphragm, according to moving of vacuum diaphragm both sides air pressure relative to variation, regulate the height of spindle, thereby make the size in main jet pipe ring shape oil spout cross section suck regulating how much and automatically of air quantity with motor, make the degree of vacuum at aditus laryngis place relatively stable,, thereby guarantee that mixed gas all has even more ideal air fuel ratio and atomizing effect under each operating mode so that can accurately adjust fuel delivery with the spindle of plunger lifting.
Further, the opening end of plunger is connected with the vacuum diaphragm, return spring is in the plunger and be connected between plunger and the air pressure control chamber end cap, the bottom of plunger is provided with the aperture that first chamber is communicated with aditus laryngis, the Carburetor body is provided with the vent that second chamber is communicated with atmosphere, be arranged so that like this overall structure is simple, compactness is unlikely because of the volume that air pressure control chamber and vacuum diaphragm increase Carburetor is set.
Under the original state, the mouth of pipe place that spindle is positioned at the main jet pipe be one section towards the diminishing conical section of needle point direction diameter.During engine start, under the effect of negative pressure, plunger drives spindle and moves towards vacuum diaphragm direction, annular oil spout cross section in the moving process between spindle conical section and the main jet pipe increases gradually, the oil mass that sprays into is increased, play the effect that starts enriching, start the enriching system and needn't install additional in addition, make whole carburetor structure simple, low cost of manufacture.
Adopt technological scheme of the present invention, can allow gasoline reach best atomizing effect, and can reach the purpose of regulating inflammable mixture concentration according to each operating mode demand of motor, the final discharging that realizes reducing general-purpose petrol engine, and guarantee the reliable startability of general-purpose petrol engine under various environmental conditionss.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the outline drawing of band speed-regulating rack of the present invention.
Fig. 3 is that the present invention is assemblied in the schematic representation on the general gasoline engines.
Fig. 4 is three kinds of structural representations of spindle in the embodiment of the invention.
Among the figure: 1. air pressure control chamber end cap; 2. vacuum diaphragm; 3. Carburetor body; 4. plunger; 5. return spring; 6. spindle; 7. closure; 8. main jet pipe; 9. main jet; 10. trunnion; 11. float chamber; 12. first chamber; 13. second chamber; 14. aperture; 15. vent; 16. throttle rod; 17. closure spring; 18. speed-regulating rack.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is elaborated.
As shown in Figure 1, general-purpose petrol engine Carburetor of the present invention, Carburetor body 3 are provided with trunnion 10, float chamber 11 and main jet 9, and trunnion is provided with closure 7 for 10 li, main jet 9 communicates with float chamber 11, main jet is equipped with main jet pipe 8 for 9 li, is provided with the gentle pressure-controlled of plunger guide hole chamber on Carburetor body 3, and the plunger guide hole is relative with main jet 9, be provided with plunger 4 in the plunger guide hole, be connected with spindle 6 on the plunger 4, an end of spindle 6 stretches in the main jet pipe 8, and plunger 4 links to each other with return spring 5; The air pressure control chamber is divided into first chamber 12 and second chamber 13 by vacuum diaphragm 2, and plunger 4 links to each other with vacuum diaphragm 2, and formed first chamber 12 communicates with aditus laryngis between vacuum diaphragm 2 and the air pressure control chamber end cap 1, and second chamber 13 communicates with atmosphere.
During work, plunger 4 and spindle 6 are with vacuum diaphragm 2, according to moving of vacuum diaphragm 2 both sides air pressure relative to variation, regulate the height of spindle 6, thereby make the size in main jet pipe 8 annular oil spout cross sections suck regulating how much and automatically of air quantity with motor, make the degree of vacuum at aditus laryngis place relatively stable, so that the spindle 6 with plunger 4 liftings can accurately be adjusted fuel delivery, thereby guarantee that mixed gas all has even more ideal air fuel ratio and atomizing effect under each operating mode, reach the purpose of energy-conserving and environment-protective.
The opening end of plunger 4 is connected with vacuum diaphragm 2, return spring 54 li of plungers and be connected to plunger 4 and air pressure control chamber end cap 1 between, the bottom of plunger 4 is provided with the aperture 14 that first chamber 12 is communicated with aditus laryngis, and Carburetor body 1 is provided with the vent 15 that second chamber 13 is communicated with atmosphere.Be arranged so that like this Carburetor overall structure is simple, compactness can be because of not being provided with the volume that air pressure control chamber and vacuum diaphragm 2 increase Carburetor.
Initially under (shutdown) state, the mouth of pipe place that spindle 6 is positioned at main jet pipe 8 be one section towards the diminishing conical section of needle point direction diameter, referring to Fig. 4.Can carry out specific design to the shape below spindle 6 conical sections according to the Environmental Conditions of motor, to satisfy the needs of concrete working condition, a among Fig. 4, b, c have only illustrated the shape of three kinds of spindles.Because second chamber 13 communicates with atmosphere, the pressure in second chamber 13 equals atmospheric pressure; First chamber 12 communicates with aditus laryngis, and the pressure in first chamber 12 is aditus laryngis place pressure.When shutting down, the equalization of pressure of vacuum diaphragm 2 upper and lowers is in atmospheric pressure, and at this moment, each element is in the static balance state.During engine start, under the effect of negative pressure, plunger 4 drives spindle 6 and moves towards vacuum diaphragm 2 directions, annular oil spout cross section in the moving process between spindle 6 conical sections and the main jet pipe 8 increases gradually, the oil mass that sprays into is increased, play the effect that starts enriching, start the enriching system and needn't install additional in addition, make whole carburetor structure simple, low cost of manufacture.
Referring to Fig. 2, Fig. 3, the Carburetor among the present invention has been cancelled chock plate, and the connection and the control mode of closure do not become, and closure directly is connected with speed-regulating rack 18 with closure spring 17 by throttle rod 16, and is by mechanical speed governors, simple and reliable for structure.
Working principle: referring to Fig. 1, when motor moved, the aperture of controlling closure 7 by manipulating mechanism of oil throttle changed the air inflow of motor, thereby reached the purpose of control engine speed.When engine speed rose, air inflow increased, and the airspeed at aditus laryngis place increases thereupon, and degree of vacuum also increases.At this moment, vacuum appears in aditus laryngis A place, that is to say in first chamber 12 that communicates with it and also form vacuum, its pressure is lower than below second chamber, 13 internal pressures, so just formed a pressure difference at vacuum diaphragm 2 upper and lower surfaces, vacuum diaphragm 2 is produced suction, make it drive plunger 4 and spindle 6 risings, increased the aditus laryngis cross section, reduced air-flow velocity, meanwhile, because after the spindle rising, the gap between spindle 6 and the main jet pipe 8 is strengthened, the annular oil spout cross section that is main jet pipe 8 increases, so the fuel injection quantity of main jet pipe 8 also increases thereupon, cooperating bigger air inflow this moment, and form the ideal air-fuel ratio mixed gas that is fit to this operating mode with fresh air.After plunger 4 rises the degree of vacuum at aditus laryngis A place is also reduced thereupon, the balance of making a concerted effort to reach of the elastic force of suction on vacuum diaphragm 2 and return spring 5 and plunger 4, spindle 6 deadweights.Otherwise when engine speed reduced, air inflow reduced, and plunger 4 moves down, and the aditus laryngis cross section just reduces.
Like this, the air velocity that flows through the aditus laryngis place remains unchanged basically, and the degree of vacuum that produces above main jet pipe 8 is also relatively stable.The gasoline of ejection main jet pipe 8 only is subjected to the control of spindle 6 and main jet pipe 8 cross-sectional sizes.Because spindle 6 and plunger 4 synchronization liftings, thereby can in time change the size in annular oil spout cross section, make the fuel delivery of Carburetor can be all the time what of air inflow carry out appropriate increase and decrease with, thereby guarantee that Carburetor all can provide the mixed gas with ideal air-fuel ratio to motor under various operating modes, and reach best atomizing effect.The discharging of motor is also effectively reduced.
Claims (3)
1. general-purpose petrol engine Carburetor, the Carburetor body is provided with trunnion, float chamber and main jet, be provided with closure in the trunnion, main jet communicates with float chamber, and the main jet pipe is installed in the main jet, it is characterized in that: on the Carburetor body, be provided with the gentle pressure-controlled of plunger guide hole chamber, the plunger guide hole is relative with main jet, is provided with plunger in the plunger guide hole, is connected with spindle on the plunger, one end of spindle stretches in the main jet pipe, and plunger links to each other with return spring; Described air pressure control chamber is divided into first chamber and second chamber by the vacuum diaphragm, and plunger links to each other with the vacuum diaphragm, and formed first chamber communicates with aditus laryngis between vacuum diaphragm and the air pressure control chamber end cap, and second chamber communicates with atmosphere.
2. general-purpose petrol engine Carburetor as claimed in claim 1, it is characterized in that: the opening end of described plunger is connected with the vacuum diaphragm, return spring is in the plunger and be connected between plunger and the air pressure control chamber end cap, the bottom of plunger is provided with the aperture that first chamber is communicated with aditus laryngis, and the Carburetor body is provided with the vent that second chamber is communicated with atmosphere.
3. general-purpose petrol engine Carburetor as claimed in claim 1 or 2 is characterized in that: under the original state, the mouth of pipe place that described spindle is positioned at the main jet pipe be one section towards the diminishing conical section of needle point direction diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110044092 CN102080609A (en) | 2011-02-24 | 2011-02-24 | Carburetor for all-purpose gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110044092 CN102080609A (en) | 2011-02-24 | 2011-02-24 | Carburetor for all-purpose gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102080609A true CN102080609A (en) | 2011-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110044092 Pending CN102080609A (en) | 2011-02-24 | 2011-02-24 | Carburetor for all-purpose gasoline engine |
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| CN (1) | CN102080609A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110608110A (en) * | 2019-10-15 | 2019-12-24 | 芜湖太阳神汽摩配制造有限公司 | Structure of multi-cavity carburetor |
| CN111486023A (en) * | 2019-01-25 | 2020-08-04 | 郭炜 | Fuel metering rod for carburetor and carburetor |
| CN115962069A (en) * | 2021-10-12 | 2023-04-14 | 重庆工业职业技术学院 | Carburetor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1118836A (en) * | 1994-07-04 | 1996-03-20 | 本田技研工业株式会社 | Gasifier with isolating film vaccum plug |
| CN1126277A (en) * | 1993-11-30 | 1996-07-10 | 铃木株式会社 | Vacuum response type carburetor |
| CN1333427A (en) * | 2000-07-17 | 2002-01-30 | 株式会社京浜 | Vacuum setting type carburetor negative pressure action valve |
| CN201747477U (en) * | 2010-06-11 | 2011-02-16 | 上海坤孚企业(集团)有限公司 | Spray pipe type constant vacuum carburetor |
-
2011
- 2011-02-24 CN CN 201110044092 patent/CN102080609A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1126277A (en) * | 1993-11-30 | 1996-07-10 | 铃木株式会社 | Vacuum response type carburetor |
| CN1118836A (en) * | 1994-07-04 | 1996-03-20 | 本田技研工业株式会社 | Gasifier with isolating film vaccum plug |
| CN1333427A (en) * | 2000-07-17 | 2002-01-30 | 株式会社京浜 | Vacuum setting type carburetor negative pressure action valve |
| CN201747477U (en) * | 2010-06-11 | 2011-02-16 | 上海坤孚企业(集团)有限公司 | Spray pipe type constant vacuum carburetor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111486023A (en) * | 2019-01-25 | 2020-08-04 | 郭炜 | Fuel metering rod for carburetor and carburetor |
| CN110608110A (en) * | 2019-10-15 | 2019-12-24 | 芜湖太阳神汽摩配制造有限公司 | Structure of multi-cavity carburetor |
| CN115962069A (en) * | 2021-10-12 | 2023-04-14 | 重庆工业职业技术学院 | Carburetor |
| CN115962069B (en) * | 2021-10-12 | 2024-04-12 | 重庆工业职业技术学院 | Carburetor |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110601 |