CN111486023A - Fuel metering rod for carburetor and carburetor - Google Patents
Fuel metering rod for carburetor and carburetor Download PDFInfo
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- CN111486023A CN111486023A CN201910072436.4A CN201910072436A CN111486023A CN 111486023 A CN111486023 A CN 111486023A CN 201910072436 A CN201910072436 A CN 201910072436A CN 111486023 A CN111486023 A CN 111486023A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M19/00—Details, component parts, or accessories of carburettors, not provided for in, or of interest apart from, the apparatus of groups F02M1/00 - F02M17/00
- F02M19/04—Fuel-metering pins or needles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M7/00—Carburettors with means for influencing, e.g. enriching or keeping constant, fuel/air ratio of charge under varying conditions
- F02M7/12—Other installations, with moving parts, for influencing fuel/air ratio, e.g. having valves
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- Control Of The Air-Fuel Ratio Of Carburetors (AREA)
Abstract
The invention relates to a fuel metering rod for a carburetor and the carburetor, wherein the fuel metering rod (1) comprises a first cylinder (101), and an inclined surface is arranged on the first cylinder (101). The first cylinder of the fuel metering rod is provided with an inclined plane, so that the functions of an auxiliary metering orifice, a transition metering orifice, a main metering orifice, a mixing ratio screw and the like on the traditional carburetor are all integrated on the fuel metering rod, the traditional auxiliary oil hole design, auxiliary oil hole screw design, transition oil hole design, main metering orifice design and main oil hole screw design are abandoned, and the carburetor does not need to replace the metering orifice screw and adjust the height of a frequent mixing ratio screw and an oil needle according to the change of environmental factors such as altitude, air temperature, humidity and the like, but the aim of adjusting the intelligent oil-gas mixing ratio is fulfilled by the mutual matching of fuel oil generated by the inclined plane on the fuel metering rod and the atmosphere with different densities according to the characteristic of atmospheric pressure.
Description
Technical Field
The invention relates to the technical field of engines, in particular to a fuel metering rod for a carburetor and the carburetor.
Background
The carburetor is an important component of vehicles such as motorcycles and the like, and mainly has the functions of mixing fuel oil and air in a certain proportion and atomizing. The carburetor can automatically prepare mixed gas with corresponding concentration according to the requirements of different working states of the engine, and outputs the mixed gas with corresponding amount for the combustion of the engine to do work.
The traditional carburetor is mainly divided into a plunger type carburetor and a vacuum film type carburetor, and the plunger type carburetor has the advantages of sensitive accelerator response, simple structure and stable work, and is also the most commonly used carburetor type in the field of motorcycle competition in China. The vacuum film type carburetor has the greatest advantage of being suitable for the operation of a quick-opening throttle valve, due to the two designs of the throttle valve and the throttle valve, the opening motion between the throttle valve and the throttle valve has certain delay, the opening speed of the throttle valve always lags behind the opening speed of the throttle valve, when the throttle valve is quickly opened, an effective negative pressure value is still kept behind the throttle valve, and the fuel oil is smoothly transited from an idle oil hole and a transition oil hole to a main metering oil hole in the delay opening process of the throttle valve, so that the phenomenon of oil shortage or flameout caused by the quick-opening throttle valve is avoided.
However, both the plunger type carburetor and the vacuum membrane type carburetor have a common technical problem that complicated replacement of the main and auxiliary orifice screws and the oil needle type, adjustment of the oil needle height and adjustment of the mixing ratio must be performed at any time and any place according to changes in environmental factors such as local altitude and air temperature.
Disclosure of Invention
In order to solve the technical defects and shortcomings in the prior art, the invention provides a fuel metering rod for a carburetor and the carburetor.
Specifically, one embodiment of the invention provides a fuel metering rod for a carburetor, which includes a first cylinder, wherein the first cylinder is provided with a bevel.
In one embodiment of the invention, the slope comprises a straight slope or an arc slope.
In one embodiment of the invention, the slope of the tangent to the curved slope increases from the first end to the second end of the first cylinder.
An embodiment of the invention also provides a carburettor including a fuel metering wand as described in any one of the preceding claims.
In one embodiment of the invention, further comprising a fuel transfer tunnel, a plate valve, and a carburetor body, said carburetor body including a float chamber, said fuel metering rod further including a connector, wherein,
the oil transportation tunnel is provided with circular through hole, just the diameter of fuel metering stick is less than or equal to the diameter of circular through hole, the connector fixed set up in the first end of first cylinder, the first cylinder of fuel metering stick passes through the connector with the plate valve is connected, just the activity of fuel metering stick follow first end to the second end of first cylinder is passed circular through hole extremely the float chamber.
In one embodiment of the present invention, the plate valve includes a first plate valve body, a rotating boss structure, a first spring, a slot structure, the rotating boss structure, the first spring, and the slot structure being coaxially disposed within a cavity of the first plate valve body, with a first end of the first spring being fixedly attached within the first plate valve body cavity, a second end of the first spring being fixedly attached to the rotating boss structure, the rotating boss structure being fixedly disposed within the cavity of the first plate valve body, wherein,
rotatory boss structure includes first cavity structure and a plurality of boss, the draw-in groove structure includes first basement structure and a plurality of groove structure, the quantity less than or equal to of boss groove structure's quantity, just first cavity structure passes first basement structure makes the boss card is gone into in the groove structure, simultaneously the fuel metering stick passes through the connector with first cavity structural connection.
In one embodiment of the present invention, the plate valve includes a second plate valve body, a metering rod rotation-preventing column, a first blocking piece, a second spring, a metering rod positioning column, a first blocking piece, a second blocking piece, and a buckle, wherein the metering rod rotation-preventing column, the first blocking piece, the second spring, the metering rod positioning column, the first blocking piece, the second blocking piece, and the buckle are coaxially disposed in a cavity of the second plate valve body in sequence, the metering rod rotation-preventing column is fixedly disposed in the cavity of the second plate valve body, the metering rod rotation-preventing column includes a second base structure and a second cylinder, the metering rod positioning column is connected to an inner cavity of the second plate valve body through a screw thread, a first blind hole is disposed at a first end of the metering rod positioning column, a second blind hole is disposed at a second end of the metering rod positioning column, wherein,
the fuel metering rod passes through the connector with the second basement structural connection, first separation blade the second spring is overlapped in proper order and is located on the second cylinder, the first end of second cylinder is fixed to be set up in the second basement structural, the second end of second cylinder sets up in the first blind hole of metering rod reference column, first card is located on the recess of second cylinder, the second separation blade with the buckle is overlapped in proper order and is located the second end of metering rod reference column, the buckle still set up in on the recess of second plate valve body.
In an embodiment of the invention, the plate valve further comprises a second clamping piece, a third spring and an adjusting rod, the adjusting rod penetrates through the through hole of the second plate valve body and is movably arranged in a second blind hole of the positioning column of the metering rod, the second clamping piece and the third spring are sequentially sleeved on the adjusting rod, and the second clamping piece is clamped on the groove of the adjusting rod.
In an embodiment of the invention, the carburetor body further comprises a plurality of fuel auxiliary pumps, and the carburetor body further comprises an air inlet chamber, wherein the fuel auxiliary pumps are communicated with the air inlet chamber and the float chamber, each fuel auxiliary pump comprises a first needle valve and a first oil delivery pipe, the first needle valve is movably arranged at the oil inlet end of the air inlet chamber and used for adjusting the size of an opening of the oil inlet end entering the air inlet chamber, the first end of the first oil delivery pipe is connected to the float chamber, and the second end of the first oil delivery pipe is connected to the oil inlet end of the air inlet chamber.
In an embodiment of the invention, the carburetor further comprises a second needle valve and a second oil delivery pipe, the carburetor body further comprises a mixing chamber, the second needle valve is movably arranged in a connecting hole of a first oil inlet end of the mixing chamber and used for adjusting the opening size of the first oil inlet end, a first end of the second oil delivery pipe is connected to the float chamber, and a second end of the second oil delivery pipe is connected to the first oil inlet end.
Compared with the prior art, the invention has the beneficial effects that:
the first cylinder of the fuel metering rod of the invention is provided with an inclined plane, thus the functions of an auxiliary metering orifice, a transition metering orifice, a main metering orifice, a mixing ratio screw and the like on the traditional carburetor are all integrated on the fuel metering rod, the traditional auxiliary oil hole design, auxiliary oil hole screw design, transition oil hole design, main oil hole design and main oil hole screw design are abandoned, in the whole running process of the carburetor, the clearance of the oil injection end of an oil transportation tunnel is always smaller than the clearance of a circular through hole at the oil inlet end of the oil transportation tunnel, thus the fuel atomization effect is better, the engine combustion work doing work is better, the engine exhaust emission is less, the consumption of the engine to the fuel is less, and simultaneously, the carburetor does not need to change the metering orifice screw and the type of an oil needle and adjust the height of the frequent mixing ratio screw and the oil needle according to the change of environmental factors such as altitude, air temperature, but the purpose of intelligently adjusting the oil-gas mixing ratio is achieved through the mutual matching of the atmospheric pressure characteristic, fuel oil generated by the inclined plane on the fuel oil metering rod and the atmosphere with different densities.
Drawings
FIG. 1 is a schematic structural diagram of a fuel metering rod according to an embodiment of the present invention;
FIG. 2 is a schematic view of a plunger carburetor according to an embodiment of the present invention;
FIG. 3 is a schematic view of a vacuum mode carburetor according to an embodiment of the present invention;
FIG. 4 is a schematic view of a start-up plunger carburetor according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of an idling plunger carburetor according to an embodiment of the present invention;
FIG. 6a is a schematic diagram of a plunger carburetor according to an embodiment of the present invention at a medium speed;
FIG. 6b is a schematic diagram of a vacuum mode carburetor of the present invention at a moderate speed;
FIG. 7 is a schematic view of a full speed plunger carburetor according to an embodiment of the present invention;
FIG. 8 is a schematic structural view of another fuel metering rod provided in accordance with an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of another fuel metering rod according to an embodiment of the present invention;
FIG. 10 is a schematic structural view of another fuel metering rod provided in accordance with an embodiment of the present invention;
FIG. 11 is a schematic view of a carburetor according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of an internal-tuning plate valve according to an embodiment of the present invention;
fig. 13 is an exploded schematic view of an internal-tuning plate valve according to an embodiment of the present invention;
fig. 14 is a schematic structural diagram of an external regulating plate valve according to an embodiment of the present invention;
fig. 15 is an exploded schematic view of an external adjustable plate valve according to an embodiment of the present invention;
FIG. 16 is a schematic structural diagram of a second card, a third spring and an adjustment lever according to an embodiment of the present invention;
FIG. 17 is a schematic view of a needle valve according to an embodiment of the present invention;
FIG. 18 is a schematic view of another carburetor according to an embodiment of the present invention.
Description of reference numerals:
1, a fuel metering rod; 2, an oil transportation tunnel; 3, a plate valve; 4 a carburetor body; 5 a second card; 6a third spring; 7 adjusting a rod; 9 a second needle valve; 10 a second oil delivery pipe; 11 a choke valve; 12 an oil float; 13, feeding an oil needle valve; 14 a fuel inlet hole; 15 a float chamber air pressure balance hole; 16 idle screws; 101 a first cylinder; 102 a connecting body; 301 a first plate valve body; 302 rotating the boss structure; 303 a first spring; 304 card slot structure; 305 a second plate valve body; 306 measuring rod anti-rotation columns; 307 a first flap; 308 a second spring; 309 a metering rod locating post; 3010 a first card; 3011 a second stop; 3012 fastening; 401 a float chamber; 402 an air intake chamber; 403 a mixing chamber; 801 first needle valve; 802 a first oil delivery pipe; 3021 a first cavity structure; 3022 a boss; 3041 a first base structure; 3042 a groove structure; 3061 a second base structure; 3062 a second cylindrical body; 3091 a first blind hole; 3092 second blind holes; 30612 anti-rotation ridge; 4021 an oil inlet end; 4031 first oil inlet end.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present. In contrast, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements present. Like reference numerals refer to like elements throughout.
Spatially relative terms, such as "below …," "below …," "below," "above …," "above," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" the other elements or features. Thus, the example term "below …" can include both an orientation of "above …" and "below …". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a fuel metering rod according to an embodiment of the present invention. The present embodiment provides a fuel metering rod for a carburetor, the fuel metering rod 1 including a first cylinder 101, wherein the first cylinder 101 is provided with a bevel.
The first cylinder of the fuel metering rod is provided with an inclined plane, so that the functions of an auxiliary metering orifice, a transition metering orifice, a main metering orifice, a mixing ratio screw and the like on the traditional carburetor are all integrated on the fuel metering rod, the traditional auxiliary oil hole design, auxiliary oil hole screw design, transition oil hole design, main oil hole design and main oil hole screw design are abandoned, and the carburetor does not need to replace the metering orifice screw and adjust the height of a frequent mixing ratio screw and an oil needle according to the change of environmental factors such as altitude, air temperature, humidity and the like, but the aim of intelligently adjusting the oil-gas mixing ratio is fulfilled by the mutual matching of fuel oil generated by the inclined plane on the fuel metering rod and the atmosphere with different densities according to the characteristic of atmospheric pressure.
All carburettors work under the atmospheric pressure environment, the atmospheric pressure is a powerful force for exerting pressure on everything, the carburettors also utilize various physical characteristics of the atmosphere to enable fuel oil and the atmosphere to be mixed and transmitted to the cylinder for combustion and work, the work of the engine cylinder is realized by fully combusting oxygen and fuel oil in the atmosphere, so that heat energy is converted into kinetic energy, in the process, air and fuel oil are mixed according to a certain proportion to enable the fuel oil to be combusted and work, the proportion is the mixing ratio of the air and the fuel oil, also called the air-fuel ratio, the air-fuel ratio is not always constant in the actual work of the engine, and the air-fuel ratio can be adjusted according to different engine rotating speeds, so that effective power output is achieved.
Theoretically, 14.7kg of air is required to completely burn 1kg of gasoline. Since the air-fuel ratio is represented by letter a, the air-fuel ratio a is equal to the weight of air divided by the weight of fuel, and the air-fuel ratio for theoretical sufficient combustion is: 14.7:1 to 14.7, the theoretical minimum air-fuel mixture ratio is: 7:1 to 7, the theoretical maximum air-fuel mixture ratio is: since 20:1 is 20, the present embodiment refers to 14.7 as a reference node, and numbers below 14.7 refer to a richer air-fuel ratio, and conversely refer to a leaner air-fuel ratio.
In practical application, according to the work requirement of the engine, the following air-fuel ratios can be summarized:
1. when the engine is started, the carburetor should provide a richer mixture with a being 6.9, and sometimes an extra-dense mixture with a being 3. 2. When the engine runs at idle speed, the carburetor should provide a richer mixed gas with a being 10-12.4. 3. When the engine runs at a medium speed, the carburetor should provide a standard mixture with a being 13-15. 4. When the engine runs at full speed, the carburetor should provide a richer air mixture of 12.6-13.5.
Therefore, different parts of the carburetor need to be adjusted to approach the air-fuel ratio data in different rotation speed periods, referring to fig. 2 and fig. 3, an oil supply system of a conventional carburetor generally comprises a choke valve, a mixing ratio screw, an idle screw, an auxiliary metering oil hole, a transition oil hole, a main metering oil hole, an oil needle, a throttle valve and the like, which work in coordination with each other, and the working principles are as follows:
referring to fig. 4, at the time of starting, especially under the condition of low air temperature, the 'choke valve' needs to be pulled up, and the 'choke valve' is designed in two ways, one way is to isolate more air, the other way is to release more fuel, no matter which final purpose is to reduce the air-fuel ratio number, the lower the air temperature, the smaller the required data is, namely, the mixed gas becomes rich, then the 'choke valve' cooperates with the auxiliary metering oil hole and the throttle valve gap to work together, so that the air-fuel ratio data between 3 and 6.9 required by the engine at the time of cold starting is generated.
2, referring to fig. 5, when idling, the engine is preheated, fuel has good evaporability during transmission, a choke valve is closed, and at this time, the auxiliary fuel metering hole, the throttle valve gap and the mixing ratio screw work together, so that air-fuel ratio data of 10-12.4 required by the engine when idling is generated.
Referring to fig. 6a and fig. 6b, at the intermediate speed, the auxiliary metering oil hole only supplies a small amount of oil, the mixing ratio screw has little influence, and the main metering oil hole, the oil needle and the throttle valve are mainly matched, and it should be noted that a transition oil hole is arranged in the vacuum membrane carburetor, and the transition oil hole mainly supplies fuel oil required by the engine from the idle speed to the intermediate speed, so as to achieve better transition, and finally generate air-fuel ratio data between 13 and 15 required by the engine at the intermediate speed.
Referring to fig. 7, at full speed, the auxiliary metering oil hole and the transition oil hole almost stop supplying oil, the mixing ratio screw has no meaning, the oil needle and the throttle valve also have no meaning, and only the main metering oil hole and the main metering oil hole are screwed, so that the air-fuel ratio data between 12.6 and 13.5 required by the engine at full speed is generated.
In one embodiment of the present invention, the slope of the first cylinder 101 may be a straight slope or an arc slope.
Referring to fig. 8, the slope in fig. 8 is a straight slope, that is, a straight slope is arranged from the first end to the second end of the first cylinder 101, wherein the first end of the first cylinder 101 is the end far away from the float chamber 401 of the carburetor, and the second end of the first cylinder 101 is the end close to the float chamber 401, the slope of the straight slope is larger (i.e., the angle of the straight slope to the X-axis is smaller), at high speed and full speed of the engine, the fuel metering rod 1 will provide more fuel, thereby reducing the data of the air-fuel ratio, which is equivalent to the screw of the main fuel metering hole in the conventional carburetor. Conversely, if the slope of the straight ramp is less (i.e., the straight ramp is angled more toward the X-axis), the meter bar will provide relatively less fuel at high and full engine speeds, thereby increasing the air-fuel ratio data. Referring to fig. 9, fig. 9 shows the slope of the metering rod with different slopes, wherein the slopes a, B, C and D have gradually increasing slopes, and wherein the straight slope from the first end to the second end of the first cylinder 101 may include a start-up and idle region, a low-speed to medium-high-speed operating region and a high-speed to full-speed operating region, so that the fuel metering rod may be controlled to be at the high and low positions of the fuel metering rod in the oil transportation tunnel to adjust the clearance between the fuel metering rod and the outlet end of the oil transportation tunnel, thereby achieving the desired fuel condition from start-up to full-speed operation. And the greater the slope of the straight slope, the greater the variation in the injected fuel quantity when transitioning from the start-up and idle regions to the high-speed to full-speed operating region.
Preferably, the float chamber 401 is made of a transparent or translucent material, so that the inside of the float chamber can be visually observed.
It should be noted that, according to the requirements of different engine operating states, the length and diameter of the fuel metering rod, the inclination of the linear slope, and the setting from the start to the full-speed operating area are all different, and are not specifically limited herein, and those skilled in the art can easily perform machining and manufacturing according to the actual situation according to the embodiment.
Referring to fig. 1, the inclined plane in fig. 1 is an arc inclined plane, that is, an inclined plane having a radian is arranged from the first end to the second end of the first cylinder 101, and the slope of a tangent line from the first end to the second end of the first cylinder 101 gradually increases, the whole arc inclined plane is formed by a curved surface from the first end to the second end, and the slope of the curved surface from the first end to the second end of the arc inclined plane is infinitely close to 90 degrees, so that fuel supply of the engine in different rotation speed periods is satisfied. Referring to FIG. 9, FIG. 9 shows the slope of the metering rod with different radians, wherein the radians of slope C-1, slope C-2, slope C-3 and slope C-4 increase gradually, wherein the curved slope may include a start-up and idle region, a low-speed to medium-high speed operating region, and a high-speed to full-speed operating region from the first end to the second end of the first cylinder 101, so that by controlling the fuel metering rod at the high-low position of the oil transportation tunnel, thereby adjusting the clearance between the fuel metering rod and the outlet end of the oil transportation tunnel to realize the fuel state required from the start to the full speed operation, the larger the radian of the arc slope is, the more fuel is provided by the fuel metering rod when the engine is from the low rotating speed area to the middle rotating speed area, therefore, the data of the air-fuel ratio is reduced, and the function is equal to that of an auxiliary metering jet, an auxiliary metering jet screw and a transition jet in a traditional carburetor. Conversely, if the camber is smaller the metering rod will provide relatively less fuel from the low to the medium speed regions of the engine, thereby increasing the air-fuel ratio data.
It should be noted that, according to the requirements of different engine operating states, the length and diameter of the fuel metering rod, the slope rate of the arc slope, and the setting from the start to the full-speed operating region are all different, and are not specifically limited herein, and those skilled in the art can easily perform the processing and manufacturing according to the actual situation according to the embodiment.
Referring to fig. 10, the fuel metering rod 1 of the present embodiment further includes a buffer area, i.e., area a in fig. 10, which is a cylinder without a bevel, and this area is an idle adjustment area, and the fuel metering rod 1 with the buffer area is suitable for a carburetor of a four-stroke engine, because the four-stroke engine needs a more precise fuel supply, especially between the idle and the opening of the plate valve 1/4, and thus the buffer area is provided on the fuel metering rod 1.
The fuel oil gushing is more when the negative pressure in the carburetor throat is larger, even under the same plate valve opening amount, the fuel oil gushing is less when the atmospheric pressure is lower, the fuel oil gushing is more when the atmospheric pressure is higher, the fuel oil supply is automatically adjusted by combining the atmospheric pressure and the air temperature at the moment through the engine, the atmospheric pressure is 67.24-101.3 kpa, the altitude is equal to the span between 3000 and 0 meters, the temperature is from 20 ℃ to-20 ℃, and the oxygen content in the atmosphere is thickened along with the reduction of the air temperature.
The fuel metering rod of the embodiment has the advantages that since the same fuel conveying pipeline is used from idling to full speed, namely a pipeline matched between the fuel metering rod and the oil transportation tunnel, under the opening of any plate valve, because the metering rod is designed into a smooth inclined plane, therefore, the oil inlet gap of the pipeline is always larger than the oil outlet gap, and when fluid flows from one space to another narrow space, the flow rate will be increased, i.e. the fuel injection will be better, the atomization will be more complete, and secondly, at idle, the line will already be filled with fuel, therefore, when the plate valve is suddenly opened in an idling state, namely the accelerator is suddenly opened, the phenomenon of instantaneous oil shortage of the engine can not occur, and the fuel metering rod replaces the designs of the auxiliary oil hole, the transition oil hole, the main oil hole and the like, so that the oil delivery channel is designed more simply, and satisfactory effects can be achieved no matter in fierce acceleration or response of an accelerator. Moreover, as the atomization effect is improved, the air mobility is improved, and the power of the engine for doing work is improved, the aims of saving oil and protecting environment are fulfilled.
The embodiment of the present invention further provides a carburetor on the basis of the fuel metering rod provided in the above embodiment, referring to fig. 12, the carburetor includes the fuel metering rod 1 described in the above embodiment, and further includes a fuel transfer tunnel 2, a plate valve 3 and a carburetor body 4, the carburetor body 4 includes a float chamber 401, an intake chamber 402 and a mixing chamber 403, the fuel metering rod 1 further includes a connecting body 102, wherein,
the oil transportation tunnel 2 is provided with a circular through hole, the diameter of the first cylinder 101 of the fuel metering rod is smaller than or equal to that of the circular through hole of the oil transportation tunnel 2, the connecting body 102 is fixedly arranged at the first end of the first cylinder 101, the first cylinder 101 of the fuel metering rod 1 is connected with the plate valve 3 through the connecting body 102, and the fuel metering rod 1 movably penetrates through the circular through hole to the float chamber 401 from the first end to the second end of the first cylinder 101.
The oil transfer tunnel 2 communicates a float chamber 401 with a mixing chamber 403, the float chamber 401 being adapted to store fuel delivered by a fuel pump to ensure fuel supply, an air inlet chamber 402 being adapted to supply air, an air outlet of the mixing chamber 403 being connected to a cylinder of the engine, the mixing chamber 403 being adapted to pass a mixture of atomized fuel particles and air into the cylinder of the engine.
Preferably, the diameter of the first cylinder 101 of the fuel metering rod is 95% -100% of the diameter of the circular through hole of the oil transportation tunnel 2.
The first cylinder 101 is matched with the oil transportation tunnel 2, the first cylinder 101 of the fuel metering rod 1 can move up and down along the axial direction in the oil transportation tunnel 2, so that a gap is generated according to the matching of the inclined surface of the first cylinder 101 and the oil transportation tunnel 2, when the first cylinder 101 moves upwards along the axial direction, the gap generated by the matching of the inclined surface of the first cylinder 101 and the oil transportation tunnel 2 is larger and larger, fuel oil which can be provided for an engine can be more and more increased, and the gap generated by the matching of the first cylinder 101 and the oil transportation tunnel 2 is adjusted, so that the engine can be started to an idling area, an idling area to a low-custom area and a full-speed working area.
Preferably, the connection body 102 is a threaded connection body, so that the first cylinder 101 is in threaded connection with the plate valve 3 via the connection body 102.
Because the change of the high-low position of the fuel metering rod 1 can sensitively affect the mixing ratio from idle speed to 1/4K, the traditional clamping groove design can not be applied, a finer adjustment mode is needed, while the embodiment realizes the adjustment of the high-low position of the fuel metering rod 1 by utilizing threads, and the inclined surface of the fuel metering rod always faces to the side of an engine during working according to aerodynamics and better atomization effect, so that the condition that the inclined surface needs to be returned after each time of high-low adjustment is also involved.
The plate valve 3 is mainly used for adjusting the position of the fuel metering rod 1 in the axial direction, the plate valve 3 comprises two forms, one is an inner adjusting plate valve, the other is an outer adjusting plate valve, and the purpose of adjusting the position of the fuel metering rod 1 in the axial direction can be achieved by using the inner adjusting plate valve or the outer adjusting plate valve.
Referring to fig. 12 and 13, the internal-adjusting plate valve includes a first plate valve body 301, a rotary boss structure 302, a first spring 303, and a slot structure 304, wherein the rotary boss structure 302, the first spring 303, and the slot structure 304 are coaxially disposed in a cavity of the first plate valve body 301, a first end of the first spring 303 is fixedly connected to an inner wall of the cavity of the first plate valve body 301, a second end of the first spring 303 is fixedly connected to a top wall of the rotary boss structure 302, so that the first spring 303 can move between the inner wall of the cavity of the first plate valve body 301 and the top wall of the rotary boss structure 302, the rotary boss structure 302 is fixedly disposed in the cavity of the first plate valve body 301, wherein the rotary boss structure 302 includes a first cavity structure 3021 and a plurality of bosses 3022, the plurality of bosses 3022 are disposed on the first cavity structure 3021, the first cavity structure 3021 has a through hole structure, the slot structure 304 includes a first base structure 3041 and a plurality of groove structures 3042, the groove structures 3042 are disposed on the side wall of the first base structure 3041, the number of the bosses 3022 is less than or equal to the number of the groove structures 3042, and the first cavity structure 3021 passes through the first base structure 3041 so that the bosses 3022 are clamped into the groove structures 3042, because the first plate valve body 301 is fixed, the bosses 3022 can be clamped into the groove structures 3042 under the action force of the first spring 303, and meanwhile, the fuel metering rod 1 is connected to the first cavity structure 3021 through the connecting body 102.
Preferably, the inner wall of the first cavity 3021 is provided with an internal thread, so that the fuel metering rod 1 is screwed with the first cavity 3021 through the connecting body 102.
Preferably, the material of the rotating boss structure 302 is nylon.
The fuel metering rod 1 of the present embodiment is matched with the first cavity structure 3021, a first spring 303 is fixed on the top of the first cavity structure 3021, meanwhile, the first cavity structure 3021 is provided with a plurality of bosses 3022, for example, the number of the bosses 3022 is 4, each boss 3022 can be correspondingly clamped into the groove structure 3042, under the acting force of the first spring 303, the bosses 3022 are always located in the groove structures 3042, and at this time, the inclined surface of the fuel metering rod 1 faces the side of the engine, when the height position of the fuel metering rod 1 needs to be adjusted, the fuel metering rod 1 can be adjusted by screwing counterclockwise or clockwise, because the number of the bosses 3022 is 4, the groove structures 3042 are in the form of "cross" slots, which is equivalent to uniformly arranging 4 groove structures 3042 on a stroke of 360 °, assuming that the included angle of each groove structure 3042 is 90 °, each 1/4 turns can be an adjustment unit, namely 90 is a unit, no matter anticlockwise or clockwise, after the adjustment is finished, the fuel metering rod 1 is pushed inwards, the boss 3022 is separated from the groove structure 3042, at the moment, the fuel metering rod 1 is rotated, so that the inclined plane of the fuel metering rod 1 is rotated to one side of an engine and then is reset, the inclined plane of the fuel metering rod 1 returns, meanwhile, the height position of the fuel metering rod 1 is changed, the adjustment is finished, according to actual measurement, according to the thread design of British 40G, when the adjustment is carried out for 1/4 circles, the height change amplitude of the fuel metering rod 1 is 0.1524 mm, and the rotation of the whole circle is 0.6096 mm.
The embodiment of the invention does not specifically limit the number of the bosses 3022 and the groove structures 3042, and the purpose of the embodiment can be achieved as long as the inclined surface of the fuel metering rod 1 still faces to one side of the engine after the position of the fuel metering rod is adjusted.
Referring to fig. 14 and 15, the external regulating type plate valve includes a second plate valve body 305, a metering rod rotation-preventing column 306, a first blocking piece 307, a second spring 308, a metering rod positioning column 309, a first blocking piece 3010, a second blocking piece 3011, a buckle 3012, the metering rod rotation-preventing column 306, the first blocking piece 307, the second spring 308, a metering rod positioning column 309, the first blocking piece 3010, the second blocking piece 3011 and the buckle 3012 are coaxially disposed in a cavity of the second plate valve body 305 in sequence, the metering rod rotation-preventing column 306 is fixedly disposed in the cavity of the second plate valve body 305, the metering rod rotation-preventing column 306 includes a second base structure 3061 and a second cylinder 3062, an anti-rotation ridge 30612 may be disposed on an outer side wall of the second base structure 3061, and a groove 30612 is correspondingly disposed in the cavity of the second plate valve body 305, so that the anti-rotation ridge 30612 is clamped into the groove in the cavity of the second plate valve body 305, and the metering rod rotation-preventing column 306 is fixedly disposed in the cavity of the second plate valve, the metering rod positioning column 309 is connected with the inner cavity of the second plate valve body 305 through a thread, namely, an external thread is arranged on the outer side wall of the metering rod positioning column 309, an internal thread is arranged at the corresponding position of the inner cavity of the second plate valve body 305, so that the threaded connection between the metering rod positioning column 309 and the inner cavity of the second plate valve body 305 is realized, a first blind hole 3091 is arranged at the first end of the metering rod positioning column 309, a second blind hole 3092 is arranged at the second end of the metering rod positioning column 309, wherein,
the fuel metering rod 1 is connected with the second base structure 3061 through the connecting body 102, the first blocking piece 307 and the second spring 308 are sequentially sleeved on the second cylinder 3062, the first blocking piece 307 is used for blocking the second spring 308 and blocking the second spring 308 from descending onto the second base structure 3061, the first end of the second cylinder 3062 is fixedly arranged on the second base structure 3061, the first blocking piece 307 and the second spring 308 are both required to be arranged at the lower side of the groove of the second cylinder 3062, the second end of the second cylinder 3062 is arranged in the first blind hole of the metering rod positioning column 309, namely, the upper end part of the groove of the second cylinder 3062 is clamped in the first blind hole, then the first clamping piece 3010 is clamped on the groove of the second cylinder 3062, so that the metering rod rotation preventing column 306 is connected with the metering rod positioning column 309, the second spring 308 is limited between the first blocking piece and the first clamping piece 3010, the second piece 3011 and the buckle 3012 are sequentially sleeved on the second end of the metering rod positioning column 309, the buckle 3012 is further disposed on another groove of the second plate valve body 305, the buckle 3012 is used to limit the positioning column 309 of the metering rod, and the buckle 3012 has elasticity and is disposed in an open loop manner, so that the metering rod can be conveniently installed and taken out when an external force is applied to the metering rod.
Preferably, the fuel metering rod 1 is screwed to the second base structure 3061 by means of the connecting body 102, i.e. an internal thread is provided in a blind hole of the second base structure 3061, so that the connecting body 102 is screwed to the second base structure 3061.
Referring to fig. 16, when the position of the fuel metering rod 1 is adjusted by using the external adjustment type plate valve, a second card 5, a third spring 6 and an adjusting rod 7 are further installed, the adjusting rod 7 passes through the through hole of the second plate valve body 305 and is movably disposed in the second blind hole 3092 of the metering rod positioning column 309, the second card 5 and the third spring 6 are sequentially sleeved on the adjusting rod 7, and the second card 5 is clamped on the groove of the adjusting rod 7.
The adjusting rod 7 is used for screwing the measuring rod positioning column 309, so that the height position of the fuel oil measuring rod 1 is adjusted. The carburetor body further comprises a cover body, the cover body cavity is used for placing the plate valve, the adjusting rod 7 needs to penetrate through a through hole in the cover body to be inserted into the second blind hole 3092, the third spring 6 is used for limiting the movement of the adjusting rod 7 between the cover body, and the second clamping piece 5 is located at the position for limiting the adjusting rod 7, so that when external force is applied to the adjusting rod 7, the adjusting rod 7 can move axially.
Preferably, the part that adjusts pole 7 and insert second blind hole 3092 is the hexagonal regulation pole, then second blind hole 3092 is the hexagonal blind hole to when adjusting pole 7 and inserting second blind hole 3092 in, then can realize the rotation of metering rod reference column 309 when clockwise or anticlockwise rotation, thereby adjust the height position of fuel metering rod 1.
Preferably, the adjustment lever 7 is marked with a scale for recording the number of rotations.
When utilizing outer debugging plate valve to transfer the school, need open the air throttle to the biggest to make plate valve 3 rise to the peak, then press down the mediation handle that the carburetor was covered perpendicularly, make in adjusting pole 7 embedding corresponding second blind hole 3092, then carry out anticlockwise or clockwise timing, it can to loosen the throttle and change the handle after the school finishes, because the nylon cylinder's of fixed metering rod both sides all have the stupefied 30612 design of anti-rotation, consequently the inclined plane direction of fuel metering rod 1 can not change when carrying out above-mentioned operation, all the time towards that side of engine, also mark the scale on adjusting pole 7 simultaneously, conveniently take notes the number of turns or return to zero. The outer adjusting plate valve can be directly adjusted outside without detaching the plate valve, and the outer adjusting plate valve is convenient to use.
Referring to fig. 11 and 17, the carburetor provided in this embodiment may further include a plurality of fuel auxiliary pumps, wherein the fuel auxiliary pumps communicate the intake chamber 402 and the float chamber 401, each fuel auxiliary pump includes a first needle valve 801 and a first oil delivery pipe 802, the first needle valve 801 is movably disposed at an oil inlet end 4021 of the intake chamber 402 and is used to adjust the opening size of the oil inlet end 4021 entering the intake chamber 402, a first end of the first oil delivery pipe 802 is connected to the float chamber 401, and a second end of the first oil delivery pipe 802 is connected to the oil inlet end 4021 of the intake chamber 402.
The size of the opening of the oil inlet end 4021 of the inlet chamber 402 can be adjusted by adjusting the height of the first needle valve 801 in the axial direction, and an oil nozzle is connected to one side of the oil outlet end of the first needle valve 801, so that fuel can be supplied to the inlet chamber 402 through the oil nozzle.
When the phenomenon of oil shortage occurs in the carburetor, for example, under extreme conditions, when the fuel provided by the maximum clearance generated by the fuel metering rod can not meet the work requirement of the engine, the engine needs secondary fuel supplement, so-called high-speed fuel supplement function, namely, an oil injection nozzle is arranged at the inner side of a venturi (choke), the oil injection nozzle is controlled by a first needle valve 801, then the first needle valve 801 is connected with an air inlet chamber 402, the first needle valve 801 is arranged with a fuel supplement opening which can just meet the requirement of the full-speed engine according to actual conditions, so that the fuel requirement of the engine in the whole rotating speed in the environment is completely met, the high-speed fuel supplement pump can be activated only by a certain negative pressure value, and is determined by the rotating speed of the engine, and the rotating speed of the engine is determined by the opening of a plate valve 3 in the choke, the rotating speed of the engine is determined by the flow rate of air under the same opening, the negative pressure value generated by the air flow rate is also determined by the air density, the air density is determined by the atmospheric pressure, the relationship between the air density and the atmospheric pressure is close, the air density and the atmospheric pressure are complementary, namely, whether the high-speed auxiliary pump needs to be started or not is determined according to the combustion work of the engine, the high-speed auxiliary pump is activated earlier in an environment with more sufficient oxygen, and the high-speed auxiliary pump reaches the preset maximum fuel injection amount under the gradually enhanced negative pressure along with the gradual approaching of the rotating speed to the full speed. If the engine needs to adapt to wider environmental factors and more accurate fuel supplement, one or more fuel supplement pumps can be arranged at the position of the throat, for example, please refer to fig. 18, the number of the fuel supplement pumps is two, the opening amount of the first needle valve 801 of the fuel supplement pumps is different, the different opening amounts are activated under different negative pressure values, a superposition effect is generated, and the whole operation section of the engine can become more linear.
In general, conventional carburetors are subject to external factors including: altitude factors, air temperature factors and humidity factors, which may influence each other.
Theoretically, in the same volume of atmosphere, under the condition that any other 2 factors are unchanged: the higher the altitude, the lower the atmospheric density, the less the oxygen content, and the lower the altitude, the higher the atmospheric density, the more the oxygen content; the higher the air temperature, the lower the atmospheric density, the less the oxygen content, and the lower the air temperature, the higher the atmospheric density, the more the oxygen content. The humidity factor is special, the humidity is a numerical value of the amount of water vapor which can be dissolved in the atmosphere, the dissolving amount is related to the atmospheric temperature, the higher the atmospheric temperature is, the higher the dissolving capacity is, and the higher the achievable humidity is, so that the volume ratio of each gas in the atmosphere is reduced, the oxygen content in the atmosphere is lower, and conversely, the lower the humidity is, the higher the oxygen content is.
In reality, in the same region and the same season, the altitude factor in most geographic environments plays a leading role, and the higher the altitude is, the lower the air temperature is, and the lower the humidity is; the lower the altitude, the higher the air temperature and the higher the humidity. The humidity factor usually has little influence on the combustion work of the engine, and the conditions influencing the humidity are many and change in the morning, the evening and the night. Therefore, the conventional carburetor manufacturer only considers two factors of altitude and air temperature, and provides a calibration cycle table of the main and auxiliary metering hole screws, the oil needle, the position of the oil needle and the position of the mixing ratio according to the two factors.
TABLE 1 Jingbin PWK 36S AG carburetor
Please refer to table 1, which is a calibration cycle table of a kyoto PWK 36S AG carburetor, wherein M/FT AS L is altitude, TEMP is air temperature, ASO is number of counterclockwise turns of a mixing ratio screw, IJ is a minor gauge screw model, ND L is a fuel pin model, POS is a fuel pin position, and MJ is a major gauge screw model, from table 1, it can be seen that the calibration altitude interval is 0 to 3000M, changes in altitude and air temperature are relatively insensitive and invariant to the calibration of an idle screw and the number of turns of the mixing ratio, while being sensitive and versatile to the calibration of the fuel pin model, the fuel pin position, and the major gauge screw, while the calibration of the minor gauge screw and the number of turns of the mixing ratio has the greatest influence only on the idle to 1/4 throttle valve opening, the fuel pin and fuel pin position, and the major gauge screw have the greatest influence on the 1/2 to wide open throttle valve opening, and the altitude interval of 0 to 3000M basically includes all regions except for Qinghai-Tibet plateau regions, and when collecting data on a fuel rod and atmospheric slope, the atmospheric temperature data are summarized AS experimental data in an experimental room for an engine.
Laboratory simulation environment: the atmospheric pressure is: 67.24kpa ((altitude 3000 m) at a temperature of 20 deg.C (summer).
Taking a KTM 2016250 EXC engine as an example, after a large number of acquisition experiments, a smooth fuel metering curve is obtained, and finally a fuel metering rod is shaped, and the fuel metering rod meets the requirement of fuel supply from idle speed to full opening of a plate valve of the engine in the simulation environment.
In reality, the atmospheric pressure will rise by 10kpa every 900 m of the altitude, that is, under the condition that the plate valve 3 is fully opened, the fuel injection quantity of the fuel injection hole reaches the maximum fuel injection quantity under the negative pressure in the carburetor throat pipe in a low altitude area, and in order to keep the air-fuel ratio of 12.6-13.5, the fuel supply quantity needs to be increased in other modes. This can be achieved by adding a high-speed fuel auxiliary pump, so that if better environmental compatibility is desired, it is necessary to simulate another atmospheric environment, i.e. a standard atmospheric pressure region with an altitude of 0M, again over a large span.
Laboratory simulation environment: the laboratory simulated atmospheric pressure is: 101.3kpa (altitude 0 m), temperature: -20 ℃ (winter).
According to all specific environments in the environment periodic table, the plate valve 3 is fully opened, the 12.6-13.5 air-fuel ratio is maintained, the fuel oil supply required by the altitude of 0 meter is the most, the power output of the engine is the strongest, and the data of the fuel oil auxiliary pump are obtained through experiments.
From the physical characteristics of the atmosphere, the atmosphere always flows from a high-pressure area to a low-pressure area at the same altitude. In the air flowing process, when the air passes through a narrow space, the flow rate of the air is accelerated, the faster the flow rate is, the larger the negative pressure value generated in the narrow space is, and the negative pressure value is just the venturi effect, therefore, in the channel of the carburetor, a contraction part is designed at the position of a throttle valve or in the process from the throttle valve to a port connected with an engine, the contraction part is called as a venturi pipe, also called as a throat pipe, and the purpose of the contraction part is to accelerate the flow rate of the air and generate more negative pressure values, under the action of the negative pressure, the fuel is ejected from a gap generated by a fuel metering rod 1 and an oil delivery tunnel 2, the larger the opening degree of a plate valve 3 is, the faster the generated negative pressure value is, the more the fuel is ejected, the ejected fuel is blown into fine oil drops by the high-speed air flow to be mixed with the air flow to move forward, and the heat is generated when the engine runs, these droplets are immediately evaporated to oil vapor and then sent to the cylinder for combustion work.
Through experiments, from low atmospheric pressure to high atmospheric pressure, the air temperature is-20 ℃, the humidity problem can be ignored, the freezing point exceeds the dew point, the air is relatively dry, under the standard atmospheric pressure and under the condition of not adding high-speed assistance, the phenomenon that the engine of the carburetor is lack of oil under the condition that the throttle valve is fully opened is found, the fuel oil quantity required by the altitude span and the temperature span can be just met by utilizing the combined action of the fuel oil assistance pump, the method is equivalent to forming an air and fuel oil sensor, the reasonable air-fuel ratio can be intelligently mixed according to the negative pressure value in the throat pipe of the carburetor at any time, and thus, the carburetor can not be sensitive to the altitude and the air temperature any more.
The carburetor provided by the embodiment of the invention can also be used for a four-stroke engine and comprises a second needle valve 9 and a second oil delivery pipe 10, wherein the second needle valve 9 is movably arranged in a connecting hole of a first oil inlet end 4031 of a mixing chamber 403 and used for adjusting the opening size of the first oil inlet end, a first end of the second oil delivery pipe 10 is connected to a float chamber 401, and a second end of the second oil delivery pipe 10 is connected to the first oil inlet end 4031 of the mixing chamber 403. The size of the opening of the first oil inlet end 4031 into the mixing chamber 403 can be adjusted by adjusting the position of the attachment hole of the first needle valve 801 in the first oil inlet end 4031 in the axial direction.
The main structure of the carburetor is additionally provided with a second needle valve 9 and a second oil delivery pipe 10 which can be used for adjusting a mixing ratio adjusting system from idle speed to 1/4 opening, the second needle valve 9 is connected with a float chamber 401, simultaneously is connected with the atmosphere (a tunnel of an air inlet), and is also connected with a throat part behind a plate valve 3, the second needle valve 9 mainly adjusts the passing size of fuel so as to control the mixing ratio data at idle speed, the effect of connecting the atmosphere is that the airflow passing through the vicinity of the second needle valve 9 at idle speed is faster, the faster airflow speed generates larger negative pressure, the larger negative pressure can absorb more fuel from the valve port position of the second needle valve 9, so that the fuel passing through when the second needle valve 9 is adjusted clockwise is less, the mixing ratio is diluted, the fuel passing through is more when the second needle valve is twisted anticlockwise, the mixing ratio is enriched and the mixing ratio is adjusted to the fastest rotating speed, if the idle speed is found to be too high or too low, the idle speed regulation is carried out, and the area A of the fuel metering rod 1 plays a role at the moment, and as long as the range of up-down adjustment does not exceed the area A, the fuel metering rod 1 cannot release the fuel to disturb the mixing ratio of the idle speed until the idle speed is regulated to a satisfactory idle speed in a matching way.
Referring to fig. 11, the embodiment of the present invention further includes a choke valve 11, an oil float 12, an oil inlet needle valve 13, a fuel inlet hole 14, a float chamber pressure balance hole 15, and an idle screw 16, where the choke valve 11 is used to control on and off of the float chamber 401 and the mixing chamber 403, the oil float 12 and the oil inlet needle valve 13 are both disposed in the float chamber 401, and the idle screw 16 is disposed on the float chamber 401.
The embodiment of the invention changes the traditional throttle valve into a plate valve, and simultaneously the carburetor of the embodiment abandons the design of the auxiliary metering oil hole, the transition oil hole, the main metering oil hole screw and the choke valve, thereby simplifying the carburetor channel, enhancing the air permeability and increasing the power output of the engine.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A fuel metering rod for a carburettor, characterised in that the fuel metering rod (1) comprises a first cylindrical body (101), wherein the first cylindrical body (101) is provided with a ramp.
2. A fuel metering rod as set forth in claim 1 wherein said ramp surface comprises a straight ramp surface or an arcuate ramp surface.
3. A fuel metering rod as claimed in claim 2, wherein the slope of the line tangent to the first end to the second end of the first cylinder (101) increases progressively.
4. A carburettor comprising a fuel metering stick (1) according to any one of claims 1 to 3.
5. A carburettor according to claim 1 further comprising a fuel transfer tunnel (2), a plate valve (3) and a carburettor body (4), the carburettor body (4) comprising a float chamber (401), the fuel metering pin (1) further comprising a connecting body (102) wherein,
the oil transportation tunnel (2) is provided with circular through hole, just the diameter less than or equal to of fuel metering stick the diameter of circular through hole, connector (102) fixed set up in the first end of first cylinder (101), first cylinder (101) of fuel metering stick (1) pass through connector (102) with plate valve (3) are connected, just fuel metering stick (1) is followed the activity of first end to the second end of first cylinder (101) is passed circular through hole extremely float chamber (401).
6. A carburettor according to claim 5 wherein the plate valve (3) comprises a first plate valve body (301), a rotary boss formation (302), a first spring (303), a catch formation (304), the rotary boss formation (302), the first spring (303) and the catch formation (304) being coaxially disposed within the cavity of the first plate valve body (301) with a first end of the first spring (303) being fixedly connected to the first plate valve body (301) cavity and a second end of the first spring (303) being fixedly connected to the rotary boss formation (302), the rotary boss formation (302) being fixedly disposed within the cavity of the first plate valve body (301),
the rotary boss structure (302) comprises a first cavity structure (3021) and a plurality of bosses (3022), the slot structure (304) comprises a first base structure (3041) and a plurality of groove structures (3042), the number of the bosses (3022) is less than or equal to the number of the groove structures (3042), the first cavity structure (3021) penetrates through the first base structure (3041) so that the bosses (3022) are clamped in the groove structures (3042), and meanwhile, the fuel metering rod (1) is connected with the first cavity structure (3021) through the connecting body (102).
7. A carburettor according to claim 5 wherein the plate valve (3) comprises a second plate valve body (305), a metering rod anti-rotation post (306), a first catch (307), a second spring (308), a metering rod locating post (309), a first catch (3010), a second catch (3011), a catch (3012), the metering rod anti-rotation post (306), the first catch (307), the second spring (308), the metering rod locating post (309), the first catch (3010), the second catch (3011) and the catch (3012) being coaxially disposed in the cavity of the second plate valve body (305) in that order, the metering rod anti-rotation post (306) being fixedly disposed in the cavity of the second plate valve body (305), the metering rod anti-rotation post (306) comprising a second base structure (3061), a second cylindrical body (3062), the measuring rod positioning column (309) is connected with the inner cavity of the second plate valve body (305) through threads, a first blind hole (3091) is formed in the first end of the measuring rod positioning column (309), a second blind hole (3092) is formed in the second end of the measuring rod positioning column (309), wherein,
the fuel metering rod (1) is connected with the second base structure (3061) through the connecting body (102), the first blocking piece (307) and the second spring (308) are sequentially sleeved on the second cylinder (3062), the first end of the second cylinder (3062) is fixedly arranged on the second base structure (3061), the second end of the second cylinder (3062) is arranged in a first blind hole of the metering rod positioning column (309), the first clamping piece (3010) is clamped on a groove of the second cylinder (3062), the second blocking piece (3011) and the buckle (3012) are sequentially sleeved on the second end of the metering rod positioning column (309), and the buckle (3012) is further arranged on the groove of the second plate valve body (305).
8. A carburetor according to claim 7, characterized by further comprising a second clamping piece (5), a third spring (6) and an adjusting rod (7), wherein the adjusting rod (7) is movably arranged in the second blind hole (3092) of the metering rod positioning column (309) through a through hole of the second plate valve body (305), the second clamping piece (5) and the third spring (6) are sequentially sleeved on the adjusting rod (7), and the second clamping piece (5) is clamped on a groove of the adjusting rod (7).
9. A carburettor according to claim 5 further comprising a plurality of fuel auxiliary pumps, the carburettor body (4) further comprising an inlet chamber (402), wherein the fuel auxiliary pumps communicate the inlet chamber (402) with the float chamber (401), the fuel auxiliary pumps comprising a first needle valve (801) and a first oil delivery pipe (802), the first needle valve (801) being movably arranged at the oil inlet (4021) of the inlet chamber (402) for adjusting the size of an opening into the oil inlet (4021) of the inlet chamber (402), the first oil delivery pipe (802) being connected at a first end to the float chamber (401) and at a second end to the oil inlet (4021) of the inlet chamber (402).
10. A carburettor according to claim 9 further comprising a second needle valve (9) and a second flow conduit (10), the carburettor body (4) further comprising a mixing chamber (403), the second needle valve (9) being movably arranged in a connecting bore of a first oil inlet end (4031) of the mixing chamber (403) for adjusting the size of the opening of the first oil inlet end, the second flow conduit (10) being connected at a first end to the float chamber (401) and at a second end to the first oil inlet end (4031).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910072436.4A CN111486023A (en) | 2019-01-25 | 2019-01-25 | Fuel metering rod for carburetor and carburetor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910072436.4A CN111486023A (en) | 2019-01-25 | 2019-01-25 | Fuel metering rod for carburetor and carburetor |
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| CN2245671Y (en) * | 1996-03-13 | 1997-01-22 | 李锺 | Nozzle plunger-type carburetor |
| CN1227621A (en) * | 1996-06-20 | 1999-09-01 | 克里斯坦·比约恩·奥马森 | Fuel-air mixture apparatus |
| CN1865685A (en) * | 2005-05-16 | 2006-11-22 | 西南师范大学 | Electronically-controlled independent control type carburettor |
| CN102080609A (en) * | 2011-02-24 | 2011-06-01 | 隆鑫通用动力股份有限公司 | Carburetor for all-purpose gasoline engine |
| CN201963419U (en) * | 2011-01-14 | 2011-09-07 | 蒙焕友 | Energy-saving carburetor of motorcycle |
| CN102261292A (en) * | 2010-05-31 | 2011-11-30 | 上海非常化油器有限公司 | Constant vacuum adjustable spray hole carburetor |
| CN202391602U (en) * | 2011-11-15 | 2012-08-22 | 广东高奇能源工程有限公司 | Motorcycle carburetor used for biological liquid fuel |
| CN209671095U (en) * | 2019-01-25 | 2019-11-22 | 郭炜 | A kind of fuel metering stick and carburetor for carburetor |
-
2019
- 2019-01-25 CN CN201910072436.4A patent/CN111486023A/en active Pending
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| GB1322570A (en) * | 1970-11-25 | 1973-07-04 | Colt Ind Operating Corp | Carburettors |
| JPH06241123A (en) * | 1993-02-13 | 1994-08-30 | Walbro Far East Inc | Opening degree restricting device of fuel regulating needle valve in carburetor |
| CN2214535Y (en) * | 1994-09-19 | 1995-12-06 | 上海乾通汽车附件有限公司 | Cone variable oil pin oil-economizing carburetor |
| CN2245671Y (en) * | 1996-03-13 | 1997-01-22 | 李锺 | Nozzle plunger-type carburetor |
| CN1227621A (en) * | 1996-06-20 | 1999-09-01 | 克里斯坦·比约恩·奥马森 | Fuel-air mixture apparatus |
| CN1865685A (en) * | 2005-05-16 | 2006-11-22 | 西南师范大学 | Electronically-controlled independent control type carburettor |
| CN102261292A (en) * | 2010-05-31 | 2011-11-30 | 上海非常化油器有限公司 | Constant vacuum adjustable spray hole carburetor |
| CN201963419U (en) * | 2011-01-14 | 2011-09-07 | 蒙焕友 | Energy-saving carburetor of motorcycle |
| CN102080609A (en) * | 2011-02-24 | 2011-06-01 | 隆鑫通用动力股份有限公司 | Carburetor for all-purpose gasoline engine |
| CN202391602U (en) * | 2011-11-15 | 2012-08-22 | 广东高奇能源工程有限公司 | Motorcycle carburetor used for biological liquid fuel |
| CN209671095U (en) * | 2019-01-25 | 2019-11-22 | 郭炜 | A kind of fuel metering stick and carburetor for carburetor |
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