CN1088153C - Carburetor - Google Patents

Abstract

The present invention relates to a carburetor in an isovacuum structure, wherein vanes in an air passage of the present invention rotate around a shaft along with the increase and the reduction of the flow rate of air when an air throttle is opened and closed; a control pole in the air passage is pushed to overcome the resistance of a constant force spring to move; the opening of an air quantity hole and an oil injection groove is changed; an oil supply curve of an electronic control oil injection device is simulated; the enrichment can be automatically started; the idle speed is automatically stabilized; an engine is stopped to work when the speed is reduced; the atomization of multiple throat openings of the isovacuum structure is automatically adjusted; fuel oil is atomized by the oil injection groove having large area after filtered by a filter; ultrasonic waves promote emulsification and atomization; the speed is automatically limited; the supply of the fuel oil is controlled by a close ring; the speed for supplying the fuel oil is accelerated by an acceleration pump.

Description

A kind of Carburetor

The present invention relates to a kind of Carburetor.

Carburetor is one of topmost parts of petrol engine fuel oil supply system, the ratio of air and fuel oil, and the abundant atomizing of fuel oil, and to the abundant burning of fuel, the output of the power of motor, and be exhaust gas discharging, fundamental influence is arranged.Traditional Carburetor is when high speed, and air inlet is more, and air velocity is fast, and fuel-oil atmozation is better, and during low speed, it is not good enough to atomize, and causes power character and Economy to descend, and blowdown increases.The constant-depression carburetor atomizing is good, but complex structure, the cost height.The characteristics of an existing maximum of Carburetor are that the relative air flue of nozzle opening is too little, fuel oil is the oil emulsion of bulk when spraying from nozzle opening, therefore fuel oil is very little with the surface of contact of air from nozzle opening ejection back, influenced the atomizing of fuel oil, need long air flue to carry out the mixing of combustible gas, cause the upper and lower layers of mixed gas inhomogeneous, the low-response of motor, consult " motorcycle " nineteen ninety-five o. 11th 34-35 page or leaf, 1997 the 12nd phase 26-27 pages or leaves.And no matter be traditional Carburetor or constant-depression carburetor, wherein fuel oil metering-orifice and air jet are all fixed, therefore, it can only be best in the proportions of ingredients in part zone, its transition position just can not guarantee best Economy and power character, so electric control fuel oil jet system just can be better than Carburetor.

The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of equal vacuum ratio Carburetor simple in structure, during its each operating mode transition, can simulate the fuel oil Mixing Curve of fuel injection system, increase the surface of contact of fuel oil spray orifice and air, make fuel-oil atmozation good, speed of response is fast.

The present invention is achieved in that and is connected with the float chamber shell under the Carburetor body, in the oil inlet quantity of float restriction filler opening is arranged, the fuel oil metering-orifice is arranged on the orifice plate and be fixed under the Carburetor body, the Carburetor base side has screw to adjust idling, air flue is arranged in the middle of it, there is blade to sway in the air flue, unlatching along with closure in the air flue, moving air promotes blade in the air flue and drives resistance that control panel overcomes constant force spring and open air jet and oil spout groove on the Carburetor body, and the flow speed stability of maintenance air, turn down closure, air mass flow reduces, and the thrust that acts on the blade reduces, so promoting control panel, moves by constant force spring, turn down air jet and oil spout groove, and the aperture of blade is reduced, keep the stable of air velocity.

Further improving the solution of the present invention is: at the Carburetor body, the float chamber shell has the ultrasonic wave transducer sheet to produce ultrasound on the orifice plate in the float chamber, promote emulsification, the atomizing of fuel oil.

The present invention's energy automatic stabilisation idling, it is that the auto idle speed device is arranged on Carburetor, it is by urceolus, fixed coil, be fixed on movable coil or permanent-magnet material on the push rod, spring and adjusting screw are formed, urceolus is fixed in a side of Carburetor, is connected with fixed coil in the hole, and push rod and the movable coil that is fixed on the push rod are arranged in the middle of the fixed coil, one end of push rod stretches out the initial position of the limiting stopper on the urceolus restriction closure, one end is a spring, and spring force is regulated by adjusting screw, and the electric current of coil is provided by magnetogenerator and rectification is amplified, during idling, spring force is greater than electromagnetic force, and push rod stretches out the restriction limiting stopper makes closure crack, when engine speed is higher than idling, the electromagnetic force against the force of the spring makes pusher retracted, limiting stopper on the closure is unrestricted at this moment, so there is not air to enter cylinder behind the closed throttle, drops to idling up to engine speed, push rod stretches out the promotion limiting stopper makes closure crack, keeps idling.

There is aditus laryngis at the middle part of Carburetor body among the present invention, air jet and oil spout groove are arranged in the aditus laryngis front, the oil spout of acceleration groove is arranged between them, there are starting upgraded spray groove and secondary air aditus laryngis in the back of aditus laryngis, at the oil spout groove, in starting upgraded spray groove and the secondary air aditus laryngis micro-porous filtration plate is arranged, fuel oil is filtered refinement, make its atomizing evenly, and to the secondary air damping.

The present invention will satisfy different operating modes when reality is used, chock plate can be set when engine start carry out enriching, can use auto by pass starter enriching, mixture strength in the time of can changing the starting of oil spout groove with the aperture that changes air jet carries out enriching, the mixture strength in the time of can compensating starting with starting upgraded spray groove.

The present invention has accelerating pump to provide this operating mode required fuel oil when accelerating mode, it be: the outside of Carburetor is connected with accelerating pump, when rapid open the throttle wide, the fuel oil in the accelerating pump by extruding fast from quickening the ejection of oil spout groove.

The present invention has the closed loop fuel device to control accurate air fuel ratio, its closed loop fuel controlling device is fixed in the Carburetor base side, in its urceolus fixed coil is arranged, its end face has spring that end cap is compressed to be attached on the hollow screw, it and end cap are separated, coil or magnetic material are arranged on the push rod, push rod is movable in urceolus, its the other end is flexible in air jet, regulate the aperture of fuel oil metering-orifice, lambda sensor by the outlet pipe center detects exhaust gas concentration, then by the aperture of circuit regulating and controlling closed loop fuel controlling device to air jet.

In the air flue of Carburetor body of the present invention, control panel is arranged, there is the plane both sides of control panel, groove or tooth bar are connected with blade, and move the equilibrium block balance blade with the blade rotation, the persevering power spring reset in its rear portion, front end has the unlatching of tooth control air jet and oil spout groove below it, rear end porose control secondary air aditus laryngis and starting upgraded groove switch, and both sides have the lengthening backplate to protect the air flue both sides, form relatively independent cavity mounting spring, and have stop screw to limit its initial position.

When the size of control oil spout groove was shorter than the stroke of control panel on the control panel of the present invention, control panel can cover the oil spout groove when high speed, do not have fuel oil to enter cylinder, has limited maximum speed, if this size does not limit maximum speed greater than the stroke of control panel.

In the mixing chamber of the Carburetor body among the present invention the secondary air aditus laryngis is arranged, the secondary air aditus laryngis is positioned on the Carburetor body behind the control panel, micro-porous filtration plate is arranged in the middle of it, the air that secondary air air inlet duct from the Carburetor body is come in is after filtration behind the plate resistance Buddhist nun, spray from the secondary air aditus laryngis, mix with the mixed gas in the air flue, the size of its air demand is regulated automatically by the aperture of control panel.

Advantage of the present invention is that equal vacuum is simple in structure, and cost is low, and fuel-oil atmozation is good, and each operating mode fuel-oil atmozation is even, response is fast, can simulate the fuel feeding curve of fuel injection system, reduces motor and flogs a dead horse, improve the utilization ratio of fuel oil, reduce environmental pollution, make Carburetor have self-cleaning function.

Further specify below in conjunction with accompanying drawing.

Accompanying drawing 1 is the structure diagram and the auto idle speed device of Carburetor.

Accompanying drawing 2 is detailed structural drawing (removing auto idle speed device and accelerating pump).

Accompanying drawing 3 is another kind of scheme and accelerating pump structural drawing of Carburetor.

Accompanying drawing 4 is structural drawing of closed loop fuel controlling device.

Carburetor as shown in Figure 1, it is by Carburetor body 1, chock plate 2, air hole 3, axle 4 and around axle 4 rotating blades 5, control panel 6, constant force spring 7, closure 8, oil inlet hole 9, float 10, orifice plate 11, ultrasonic wave transducer sheet 12, hybrid channel 13, fuel oil metering-orifice 14, float chamber shell 15, adjusting screw 16, spring 17, air jet 18, oil spout groove 19, limiting stopper 20, fixed coil 21, movable coil 22, push rod 23, spring 24, urceolus 25, screw 26 is formed.Chock plate 2 is arranged in the air flue of Carburetor body 1, closure 8 is arranged thereafter, middle control panel 6 is in constant force spring 7 and to-and-fro motion under the effect of axle 4 rotating blades 5.Close chock plate 2, pilot engine, open chock plate 2, open closure 8, the air mass flow in the air flue strengthens, and rotates around axle 4 so air promotes blade 5, overcomes the resistance of constant force spring 7 simultaneously, promotes control panel 6 and moves.The rotation angle of blade 5 is preferable between the 20-75 degree.Control panel 6 can be a straight line with the surface of contact of blade 5, can also be the garden arc.There is equilibrium block the upper end of blade 5, and the weight of equilibrium block equals the weight of blade, like this in the working environment of high vibration, blade can the time not closed or influences air inlet in the air flue because of focusing on vibration certainly, with the termination of the blade 5 of control panel 6 contact both sides, become the garden arc, to reduce friction.Control panel 6 is when to-and-fro motion, shoe covers the profile of tooth on air jet 18 and oil spout groove 19, can change the open area of air jet 18 and oil spout groove 19 simultaneously, proportions of ingredients in the time of can changing fuel feeding according to the needs of engine power curve of output is to satisfy the different curves of output of different motors or same motor.For example the tooth on the oil spout groove 19 is close more, and mixed gas is even more.Control on-board switching oil spout groove be shorter in length than the stroke of control panel 6 time, the control panel of oil spout groove front can cover oil spout groove 19 when high speed, do not have mixed gas to enter cylinder this moment, effectively limited the maximum speed of motor.When not limitting rotating speed, the length of control on-board switching oil spout groove must be greater than the stroke of control panel 6.The supply of the size decision mixed gas that oil spout groove 19 is opened and with air flue in the ratio of pure air.Tooth on the air jet 18 is then controlled the concentration of mixed gas, and the area of unlatching is little, and then mixed gas is dense, otherwise then mixed gas is rare.Not under the situation of standard-sized sheet, by controlling the ratio of their open areas, determine fuel delivery at air jet 18 and oil spout groove 19, behind the standard-sized sheet, then by fuel oil metering-orifice 14 control fuel deliveries, opening speed is by the speed of related movement decision of blade 5 and control panel 6.Screw 16 is the air mass flows when regulating idling, and the fuel emulsification that drinks up from fuel oil metering-orifice 14, the aperture of 13 both sides, hybrid channel can improve the emulsifying effectiveness of fuel oil by hybrid channel 13.Also have air hole 13 and oil inlet hole 9 on the Carburetor body 1, its underpart is connected with float chamber shell 15, float 10 and the orifice plate 11 that is fixed in Carburetor body 1 are arranged in the float chamber, fuel oil metering-orifice 14 is arranged on the orifice plate 11, ultrasonic wave transducer sheet 12 is arranged in the middle of it, the power supply of ultrasonic generator is provided and rectification by magnetogenerator, like this, ultrasonic generator just can promote the emulsification of fuel oil, even enter the mixed gas in the air flue, also can further atomize, and burning can not take place.Ultrasound is a kind of electronic product of maturation, and its circuit the present invention do not relate to.When orifice plate 11 was enough big, float chamber shell 15 was fixed in orifice plate 11 times.By fixed coil 21, movable coil 22, push rod 23, spring 24, urceolus 25, the auto idle speed device that screw 26 is formed, the idling of coming the automatic stabilisation motor by the limiting stopper 20 of control on the closure 8, its urceolus 25 is connected to a side of Carburetor body 1, be connected with fixed coil 21 in the hole of urceolus 25, push rod 23 is arranged in the middle of the fixed coil 21, movable coil 22 or permanent-magnet material are fixed on the push rod 23, one end and the limiting stopper 20 of push rod 23 contact, the other end is a spring 24, spring force is regulated by adjusting screw 26, when engine speed is lower than idling, the electric current that is provided by magnetogenerator acts on coil after rectification or rectification are amplified and since its magnetic force that repels mutually a little less than, be not enough to overcome the elastic force of spring 24, so push rod 23 stretches out, promote limiting stopper 20 and make closure 8 crack; After engine speed was higher than idling, electromagnetic force overcame the resistance of spring 24, made push rod 23 withdrawal, and this moment, limiting stopper 20 was not hindered, so closure 8 complete shut-downs do not have air to enter cylinder during close the throttle 8.When engine speed was reduced to idling, the electric current that magnetogenerator provides reduced, and electromagnetic force reduces, so spring 24 overcomes the effect of electromagnetic force, promote push rod 23 and stretch out, promote limiting stopper 20 and move, make closure 8 crack, recover the supply of mixed gas, so motor starts automatically.

Carburetor as shown in Figure 2, it has removed auto idle speed device and accelerating pump, and it is by Carburetor body 1, air hole 2, air jet 3, separate lubricating oil hole 4, axle 5 reaches around axle 5 rotating blades 6, stop screw 7, quicken oil spout groove 8, oil spout groove 9, control panel 10, starting upgraded groove 11, filter plate 12, backplate 13, closure 14, baroswitch hole 15, ultrasonic wave transducer sheet 16, float chamber shell 17, orifice plate 18, secondary air aditus laryngis 19, fuel oil metering-orifice 20, float 21, oil inlet hole 22, starting upgraded air inlet duct 23, adjusting screw 24, enriching oil spout groove 25, secondary air air inlet duct 26, sliding sleeve 27, constant force spring 28, enriching fuel oil metering-orifice 29 is formed.Its structure is the same with Fig. 1, but Carburetor body 1 tilts in this programme, 6 big portion's operating times of blade are perpendicular to horizontal plane like this, so it is insensitive to vibrating, can not want the deadweight of equilibrium block balance blade 6, and the both sides of blade 6 there are sealed skirt, have increased sealing area, improve sealing effect, and reduced machining accuracy.There is axle the sealed skirt both sides, are contained in 27 li of sliding sleeves on the control panel 10, move up and down in the groove of control panel 10 both sides, promote control panel 10 move left and right simultaneously.The initial position of stop screw 7 regulation control plates 10 is arranged at the top of control panel 10, and there is the backplate 13 of lengthening both sides, the friction loss when reducing air inlet, and constant force spring 28 is in the cavity that seals relatively between Carburetor body 1 and the control panel 10.Below it except control air jet 3 and oil spout groove 9, also control has starting upgraded spray groove 11 and secondary air aditus laryngis 19, the air of secondary air aditus laryngis 19 is that the secondary air air inlet duct 26 by control panel 10 downsides provides, rising along with engine speed, open the open area of big secondary air aditus laryngis 19 simultaneously, upwards ejection after filter plate 12 dampings of air in secondary air aditus laryngis 19 that flow to by secondary air air inlet duct 26, intersect vertically with the mixed gas in the intake duct, diluted the denseer mixed gas of intake duct lower floor significantly, and because filter plate 12 and the gap between the control panel 10 in the secondary air aditus laryngis 19 are minimum, secondary air can be regulated automatically according to the air inflow increase and decrease, so mixed gas is more even.10 times opposite sides of control panel are starting upgraded air inlet ducts 13, there is air from then on to flow to starting upgraded groove 11 during starting, there is micro-porous filtration plate 12 that the fuel oil that enriching fuel oil metering-orifice 29 drinks up is refiltered refinement in the starting upgraded groove 11 after 25 atomizings of enriching oil spout groove, the concentration of the fuel oil when replenishing starting, in case engine speed reaches idling, control panel 10 fine motions have been about to enriching groove 11 and have covered.Oil spout groove 9 on the control panel 10 is very thin grooves, and be the profile of tooth oil supply on the Carburetor body 1 below it, there is in the middle of it filter plate 12 that fuel oil is filtered refinement, this structure makes oil spout groove 9 move with blade 6, when control panel 10 by the control of the tip of blade 6, and the surface of contact on the control panel 10 is when being perpendicular to the straight line of bottom plane, with reference to Figure of abstract, so 9 of oil spout grooves always are positioned under the termination of blade 6, the air velocity at oil spout groove 9 places is always maximum and consistent like this.Separation lubricating oil hole 4 among Fig. 2 is two adopt to separate oil inlet hole when lubricated towards motor, and baroswitch hole 15 is that the negative pressure when utilizing air inlet is used when opening fuel tap or diaphragm accelerating pump.The ultrasonic wave transducer sheet is arranged in Carburetor body 1, orifice plate 18 or floats on chamber enclosure 17 times.31；2；3；4；5；6；7；8；9；10；11；12；13；14；15；16；17；18；19；20；21；22；23；24；25；26；27；28；29；30；31；32；33；34；35；16；12；2；2113；345；57；3；16，。When Rocker arm 5 resetted, auto idle speed device 6 limited its position according to the rotating speed of motor.Blade 20 in the air flue 13 of Carburetor body 1 is perpendicular to horizontal plane, vibration is to blade 20 not influence when axle 8 rotates like this, the both sides of blade 20 have gear to be connected with tooth bar on the control panel 17, and sealed skirt 19 sealings are arranged, and the gear of blade 20 downsides has spring 10 vibration dampings for 9 times.Axle 23 is arranged between blade 20 in air flue 13 and the closure 25, have torsion spring 24 to move on the axle 23 around top promotion control panel 17.Below control panel 17, there is wing plate 27 to be positioned at the side of secondary air air inlet duct 26, control the enriching spout 28 of its side, filter combustible gas enriching spout 28 outflows from the side of refinement during starting through oil spout groove 21, enter secondary air aditus laryngis 22, starting rear control plate 17 moves, and wing plate 27 is closed enriching spout 28.The lowest part of oil spout groove 21 is emulsification passages 33, when the emulsification space of oil spout groove 21 hour, fully the fuel oil of emulsification and air that passage 33 is come in do not continue to mix in oil spout groove 21 bottoms, being filtered oil spout groove that plate separates 21 actual is the continuation of passage 33, it is excessive following fuel oil can not occur, above the rare excessively situation of fuel oil.

Fuel oil controlling device as shown in Figure 4 is fixed in Carburetor body 1 side, regulate the aperture of fuel oil metering-orifice 2, it is by urceolus 3, fixed coil 4, spring 5, end cap 6, hollow screw 7, push rod 8, slit nut 9, spring 10, coil 11 is formed, and the urceolus 3 of fuel oil controlling device is fixed in the outside of Carburetor body 1, is connected with fixed coil 4 in the tube, its outer end has spring 5 to compress end cap 6 to be close on the hollow screw 7, push rod 8 is arranged in the hole of end cap 6, and push rod 8 one ends have slit nut 9 fastening, and an end can stretch in air jet 2, be connected with coil 11 on the push rod 8, and have spring 10 that push rod 8 and end cap 6 are flexible coupling, and regulate slit nut 8, can change the initial position of push rod 8, adjust the aperture of air jet 2, stablize idling.During engine operation, the exhaust gas concentration by in the lambda sensor detection outlet pipe then by the electric current in the computer control coil, changes the aperture of 8 pairs of air jets 2 of push rod, to change fuel delivery, forms closed control circuit.As shown in the figure, an air jet part is control panel control, and a part is the control of fuel oil controlling device.One in two coils is replaced with permanent-magnet material, and circuit will be simplified.

In the specific implementation, Carburetor can adopt starting upgraded automatically as required, and fuel oil filters refinement, the secondary air atomizing, ultrasonic atomization, accelerating pump quickens, automatic speed-limiting, automatic stabilisation idling, every technology such as closed loop fuel feeding adjusting, also can be used in combination mutually, concerning the motor of multi-cylinder multithroat carburetor, wherein a part is provided with the auto idle speed device, other be contract fully, do not have air to enter cylinder, when quickening again, open, so just more fuel-efficient.Wherein the permanent-magnet material in the auto idle speed device is ferrite or rare earth permanent-magnetic material.Air flue on the Carburetor can be the various shapes that meet aerodynamic characteristics, but aditus laryngis slips over the Venturi tube garden and cross, and there is backplate the air flue both sides, and two ends are arc transition, and the centre is square for good.Can install the auto by pass starter additional in the air flue side, best embodiment should be that during starting, the air jet aperture is minimum, the mixed gas at oil spout groove place is just extremely dense, in case rotating speed reaches idling, blade opening is little to be increased, and the control panel displacement is bigger, allow air jet open rapidly, so the mixture strength at oil spout groove place reduces rapidly, satisfies the operating mode demand, so just need not to increase in addition automatic start excess fuel device.Particularly the filter plate in the oil spout groove can adopt porous metal plate, micropore sintering ceramic, cellular plastic and micropore powdered metallurgical material, back three kinds of materials are thick more, and tolerance is few more excessively, thin more tolerance is just many more, therefore, they are made in the thick oil spout groove that is contained in control panel of the thin end of an end, and and control panel between keep minimum gap, just can control air demand with tooth, during low speed, thicker filter plate air feed is less, and control panel air feed thin during high speed is more, what of air demand porous metal plate then decide by the abundance of adjusting the hole, the few air inlet of micropore is few during low speed, during high speed the many air inlets of micropore many, the concentration of air jet control air demand.The oil emulsion that passage is sent here is directly delivered under the filter plate, and reduces the space as far as possible, allows the fuel oil of not emulsification flow to passway continuation emulsification, and response is fast like this.The material of Carburetor can be metallic material such as zinc, aluminium, also can be oil resistant, wear-resisting, corrosion-resistant, resistant to elevated temperatures engineering plastics, but it is better as high-abrasive materials such as the nylon of selflubricating, teflon, under the operating ambient temperature condition with higher, can between Carburetor and motor, install thermal baffle additional.

Claims (10)

1, a kind of Carburetor, it is characterized in that: be connected with the float chamber shell under the Carburetor body, in the oil inlet quantity of float restriction filler opening is arranged, the fuel oil metering-orifice is arranged on the orifice plate and be fixed under the Carburetor body, the Carburetor base side has screw to adjust idling, air flue is arranged in the middle of it, there is blade to sway in the air flue, unlatching along with closure in the air flue, moving air promotes blade in the air flue and drives cloudy power that control panel overcomes constant force spring and open air jet and oil spout groove on the Carburetor body, and keeps the flow speed stability of air, turns down closure, air mass flow reduces, the thrust that acts on the blade reduces, and moves so constant force spring promotes control panel, turns down air jet and oil spout groove, and the aperture of blade is reduced, keep the stable of air velocity.

2, a kind of Carburetor is characterized in that: at the Carburetor body, the float chamber shell has the ultrasonic wave transducer sheet to produce ultrasound on the orifice plate in the float chamber, promote emulsification, the atomizing of fuel oil.

3, Carburetor as claimed in claim 1, it is characterized in that: the auto idle speed device is arranged on the Carburetor, it is by urceolus, fixed coil, be fixed on movable coil or permanent-magnet material on the push rod, spring and adjusting screw are formed, urceolus is fixed in a side of Carburetor, is connected with fixed coil in the hole, and push rod and the movable coil that is fixed on the push rod are arranged in the middle of the fixed coil, one end of push rod stretches out the initial position of the limiting stopper on the urceolus restriction closure, one end is a bomb tube, and spring force is regulated by adjusting screw, and the electric current of coil is provided by magnetogenerator and rectification is amplified, during idling, spring force is greater than electromagnetic force, and push rod stretches out the restriction limiting stopper makes closure crack, when engine speed is higher than idling, the electromagnetic force against the force of the spring makes pusher retracted, limiting stopper on the closure is unrestricted at this moment, so there is not air to enter cylinder behind the closed throttle, drops to idling up to engine speed, push rod stretches out the promotion limiting stopper makes closure crack, keeps idling.

4, Carburetor body as claimed in claim 1, it is characterized in that: there is aditus laryngis at the middle part, air jet and oil spout groove are arranged in the aditus laryngis front, the oil spout of acceleration groove is arranged between them, and there are starting upgraded spray groove and secondary air aditus laryngis in the back of aditus laryngis, at the oil spout groove, in starting upgraded spray groove and the secondary air aditus laryngis micro-porous filtration plate is arranged, fuel oil is filtered refinement, make its atomizing evenly, and to the secondary air damping.

5, Carburetor as claimed in claim 1, it is characterized in that: chock plate can be set when engine start carry out enriching, can use auto by pass starter enriching, mixture strength in the time of can changing the starting of oil spout groove with the aperture that changes air jet carries out enriching, the mixture strength in the time of can compensating starting with starting upgraded spray groove.

6, Carburetor as claimed in claim 1 is characterized in that: the outside of Carburetor is connected with accelerating pump, when rapid open the throttle wide, the fuel oil in the accelerating pump by extruding fast from quickening the ejection of oil spout groove.

7, Carburetor as claimed in claim 1, it is characterized in that: the closed loop fuel controlling device is fixed in the Carburetor base side, in its urceolus fixed coil is arranged, its end face has spring that end cap is compressed to be attached on the hollow screw, it and end cap are separated, coil or magnetic material are arranged on the push rod, push rod is movable in urceolus, its the other end is flexible in air jet, regulate the aperture of fuel oil metering-orifice, lambda sensor by the outlet pipe center detects exhaust gas concentration, then by the aperture of circuit regulating and controlling closed loop fuel controlling device to air jet.

8, control panel as claimed in claim 1, it is characterized in that: there is the plane both sides of control panel, groove or tooth bar are connected with blade, and move with blade rotation, the persevering power spring reset in its rear portion, front end has the unlatching of tooth control air jet and oil spout groove, rear end porose control secondary air aditus laryngis and starting upgraded groove switch below it, both sides have the lengthening backplate to protect the air flue both sides, and have stop screw to limit its initial position.

9, control panel as claimed in claim 8, it is characterized in that: when the size of control oil spout groove is shorter than the stroke of control panel on the control panel, control panel can cover the oil spout groove when high speed, there is not fuel oil to enter cylinder, limited maximum speed, if this size does not limit maximum speed greater than the stroke of control panel.

10, secondary air aditus laryngis as claimed in claim 8, it is characterized in that: the secondary air aditus laryngis is positioned on the Carburetor body behind the control panel, micro-porous filtration plate is arranged in the middle of it, the air that secondary air air inlet duct from the Carburetor body is come in is after filtration behind the plate resistance Buddhist nun, spray from the secondary air aditus laryngis, mix with the mixed gas in the air flue, the size of its air demand is regulated automatically by the aperture of control panel.

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