CN112343738A - Diaphragm type carburetor suitable for high temperature state - Google Patents
Diaphragm type carburetor suitable for high temperature state Download PDFInfo
- Publication number
- CN112343738A CN112343738A CN202011132120.9A CN202011132120A CN112343738A CN 112343738 A CN112343738 A CN 112343738A CN 202011132120 A CN202011132120 A CN 202011132120A CN 112343738 A CN112343738 A CN 112343738A
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- Prior art keywords
- diaphragm
- carburetor
- oil
- middle body
- engine
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000005086 pumping Methods 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims description 14
- 239000012528 membrane Substances 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 abstract description 10
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 61
- 239000000295 fuel oil Substances 0.000 description 8
- 239000000446 fuel Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Images
Classifications
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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
- F02M17/00—Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00
- F02M17/02—Floatless carburettors
- F02M17/04—Floatless carburettors having fuel inlet valve controlled by diaphragm
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention is a diaphragm type carburetor suitable for high temperature state, it includes upper body, middle body and lower part of the body (or lower cover) of the carburetor, the said upper body, middle body and lower part of the body (or lower cover) are designed separately; the upper body is connected with the engine, the mixing chamber is butted with an air inlet pipe of the engine, the heat radiation generated when the engine works can only transmit heat to the upper body part of the carburetor, the middle body and the lower body (or the lower cover) part of the carburetor are far away from the upper body of the carburetor, and the heat radiation generated when the engine works can not be transmitted to the middle body and the lower body (or the lower cover), so that the functions of the diaphragm pumps and the metering systems on the middle body and the lower body can not be influenced, the temperature can not rise to more than 60 ℃ even if part of the heat radiation is transmitted, and the service life is longer; the oil pumping and metering system of the carburetor is independently formed into a component, is separated from the main body, and the separation distance is not limited. In addition, the lower body is additionally provided with the oil pumping ball, so that the starting times of the engine are reduced, and the starting performance of the engine is improved.
Description
Technical Field
The invention relates to a diaphragm type carburetor, in particular to a diaphragm type carburetor applicable to a high-temperature state.
Background
The carburetor is a very important accessory of the gasoline engine, is the heart of the engine, mixes a certain amount of fuel with air, and respectively provides required mixed gas according to the requirements of the engine under various working conditions so as to ensure the normal operation of the engine. At present, the types of carburetors on the market are various, and diaphragm carburetors and float carburetors are available, and butterfly valves, rotary valves and the like are available in the diaphragm carburetors.
In the prior art diaphragm carburetor, if the engine operates at a high temperature for a period of time, the surface temperature of the carburetor rises to above 60 ℃, and then gasoline evaporates when the engine operates at such a temperature, so that gasoline vapor is generated in the carburetor to form air resistance, the operation of the engine is influenced, and the engine is unstable in operation or cannot be started.
As shown in fig. 12, in the diaphragm carburetor according to the prior art, the carburetor is composed of an upper body (10), a middle body (20), a lower body (30), and the like. An oil pumping diaphragm (25) and a sealing gasket and other accessories are arranged between the upper body (10) and the middle body (20) to form a diaphragm pump (24) with an oil pumping function, and an oil absorbing diaphragm (34) and a sealing gasket and other accessories are arranged between the middle body (20) and the lower body (30) to form a metering system. The dashed boxes in fig. 12 indicate the parts of the diaphragm pump (24) and the metering system (33), respectively.
In the prior art diaphragm carburetor, an upper body (10), a middle body (20) and a lower body (30) (or a lower cover) of the carburetor are assembled together to form a whole, when the carburetor is installed on an engine, the temperature of the carburetor rises to be higher than 60 ℃ due to heat radiation generated during the operation of the engine, vapor generated by the evaporation of gasoline forms air resistance, and the gasoline vapor in a metering chamber are mixed together, so that the fuel supplied to the engine by the carburetor is changed, and the operation of the engine is unstable. Another problem is that the oil supply is not smooth because the oil pumping capability of the diaphragm pump is weakened by the high temperature.
FIG. 12 illustrates the following operation of a prior art diaphragm carburetor: when the engine works, the pulse generated on the engine is led into a pulse cavity (26) of the carburetor (figure B2) through a pulse hole, a pump membrane (32) in the pulse cavity (26) moves up and down to push a tongue piece A (241) and a tongue piece B (242) to move alternately, so that suction force is generated to suck fuel oil from an oil pot and the fuel oil is sucked into a metering cavity of the carburetor from an oil inlet pipe along oil paths of e2, f2, g2 and B2, then the fuel oil is sprayed out from a main nozzle (11) arranged on the body and mixed with air entering from an air inlet (14) to form mixed gas, and the mixed gas flows into the engine from a mixing chamber (12) on the body to be used for combustion work of the engine and output power outwards.
Disclosure of Invention
Based on the problems, the invention provides a diaphragm type carburetor applicable to a high-temperature state, and aims to solve the problems that the temperature rises to be over 60 ℃, normal starting cannot be realized, the oil pumping capacity is weakened, the oil supply is not smooth and the like. Therefore, the invention adopts the following technical scheme.
The invention relates to a diaphragm type carburetor applicable to a high-temperature state, which comprises an upper body, a middle body, a lower body (or a lower cover) and a diaphragm pump of the carburetor, wherein a mixing chamber is arranged in the upper body, and the upper body, the middle body and the lower body are all independently designed; the upper body is connected with the engine, the mixing chamber is in butt joint with an air inlet pipe of the engine, the heat radiation generated when the engine works can only transmit heat to the upper body part of the carburetor, the middle body and the lower body (or the lower cover) part of the carburetor are far away from the upper body of the carburetor, and the heat radiation generated when the engine works can not transmit to the middle body and the lower body (or the lower cover), so that the functions of the diaphragm pumps and the metering systems on the middle body and the lower body can not be influenced, and the temperature can not rise to more than 60 ℃ even if part of the heat radiation is transmitted.
Preferably, the middle body comprises a middle body upper cover, a middle body sealing sheet, an oil pumping membrane, a pulse cavity, a metering cavity and a pulse pipe.
In any of the above aspects, preferably, the diaphragm pump is composed of a middle body, a middle body upper cover, a middle body sealing sheet and a middle body diaphragm.
In any of the above schemes, preferably, the side of the middle body is provided with a metering system, the metering system is composed of the middle body, a lower body sealing sheet, an oil absorption membrane and a lower body, the oil pumping and metering system formed by the metering system is independently a component and separated from the main body, and the separation distance is not limited.
In any one of the above aspects, it is preferable that a main nozzle is provided at a middle portion of the upper body, the main nozzle being provided at a lower end of the plunger; the left side of the middle part of the upper body is provided with an air inlet, and the right side of the middle part of the upper body is provided with an air outlet; the lower end of the upper body is provided with a lower body cover.
In any of the above schemes, preferably, an oil inlet, an oil outlet and an oil passage are arranged between the upper body and the middle body.
In any of the above schemes, preferably, one side of the middle body is provided with an oil inlet pipe, and the upper end of the oil inlet pipe is provided with a filter screen.
In any of the above schemes, preferably, the top of the middle body is provided with an oil pumping diaphragm, and the oil pumping diaphragm is provided with a tongue piece A, a tongue piece B, a pumping film, a pulse cavity and a pulse tube; the bottom of the middle body is provided with a measuring cavity.
In any of the above aspects, preferably, a lower body sealing plate is arranged between the lower body and the middle body.
In any of the above solutions, it is preferable that the lower end of the lower body is provided with an oil pumping ball.
Drawings
These and other characteristic aspects and advantages of the present invention will now be described, as preferred but not limiting embodiments thereof, will become apparent upon reading the following detailed description with reference to the accompanying drawings, in which:
FIG. 1 is a schematic diagram of a preferred embodiment of a diaphragm carburetor according to the present invention adapted for use at high temperatures.
FIG. 2 is a top view of the preferred embodiment of the diaphragm carburetor of FIG. 1 adapted for use in a high temperature condition in accordance with the present invention.
FIG. 3 is a sectional view taken in the direction A-A of the preferred embodiment of FIG. 1 adapted for use with a diaphragm carburetor according to the present invention at an elevated temperature.
FIG. 4 is a sectional view taken in the direction B-B of the preferred embodiment of FIG. 1, adapted for use with a diaphragm carburetor according to the present invention at an elevated temperature.
FIG. 5 is a partial cutaway view of the pulse tube of the preferred embodiment of FIG. 2 adapted for use in a diaphragm carburetor operating at high temperatures in accordance with the present invention.
FIG. 6 is a schematic diagram of the structural components of the preferred embodiment of the centerbody of FIG. 1 adapted for use in a diaphragm carburetor operating at high temperatures in accordance with the present invention.
FIG. 7 is a partial cross-sectional view of the preferred embodiment of the centerbody of FIG. 5 adapted for use with a diaphragm carburetor according to the present invention at elevated temperatures.
FIG. 8 is a cross-sectional view in still another orientation of the preferred embodiment of FIG. 5 adapted for use with a diaphragm carburetor of the high temperature condition in accordance with the present invention.
FIG. 9 is a multi-directional cross-sectional view of the preferred embodiment of FIG. 5 adapted for use with a diaphragm carburetor at high temperatures in accordance with the present invention.
FIG. 10 is a schematic illustration of the working oil circuit of the preferred embodiment of FIG. 1 adapted for use with a diaphragm carburetor at high temperatures in accordance with the present invention.
FIG. 11 is a schematic illustration of another working oil circuit of the preferred embodiment of FIG. 1 adapted for use with a diaphragm carburetor according to the present invention at high temperatures.
FIG. 12 is a schematic view of a prior art diaphragm carburetor.
Detailed Description
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
Referring now to the drawings, FIGS. 1-10 depict a block diagram of the external form of the carburetor of the present invention. A diaphragm type carburetor suitable for a high-temperature state comprises an upper body 10, a middle body 20, a lower body 30 (or a lower cover) and a diaphragm pump 24 of the carburetor, wherein a mixing chamber 12 is arranged in the upper body 10, and the upper body 10, the middle body 20 and the lower body 30 are all independently designed; the upper body 10 is connected with the engine, the mixing chamber 12 is butted with an air inlet pipe of the engine, the heat radiation generated when the engine works can only transmit heat to the upper body 10 part of the carburetor, the middle body 20 and the lower body 30 (or the lower cover) part of the carburetor are far away from the upper body 10 of the carburetor, the heat radiation generated when the engine works can not transmit to the middle body 20 and the lower body 30 (or the lower cover), thus the functions of the diaphragm pump 24 and the metering system 33 on the middle body 20 and the lower body 30 can not be influenced, and the temperature can not rise to more than 60 ℃ even if part of the radiation is transmitted.
The upper body 10, the middle body 20 and the lower body 30 (or the lower cover) are separated, the middle body 20 and the lower body 30 (or the lower cover) are integrated to form a separated diaphragm pump and a metering system, and oil supply generated by the diaphragm pump and the metering system supplies oil to the carburetor main body through an oil passage.
In the present embodiment, the middle body 20 includes a middle body upper cover 22, a middle body sealing sheet 23, a diaphragm pump 24, an oil pumping diaphragm 25, a pulse chamber 26, a metering chamber 27 and a pulse tube 28 (see fig. 1-3).
In the present embodiment, the diaphragm pump 24 is composed of a middle body upper cover 22, a middle body sealing plate 23, and a pump oil diaphragm 25.
In this embodiment, a metering system 33 (shown in fig. 4) is disposed on the side of the middle body 20, and the metering system is composed of the middle body 20, the lower sealing sheet 31, the oil absorption membrane 34 and the lower body 30, so that the oil pumping and metering system is a single component and is separated from the main body, and the separation distance is not limited.
In the present embodiment, a main nozzle 11 is provided in the middle of the upper body 10, and is provided at the lower end of the plunger 15; an air inlet 14 is arranged at the left side of the middle part of the upper body 10; the right side of the middle part of the upper body 10 is provided with an air outlet 12; the lower end of the upper body 10 is provided with a lower body cover 13.
In the present embodiment, an oil inlet 16, an oil outlet 17 and an oil passage 18 are provided between the upper body 10 and the middle body 20.
In this embodiment, one side of the middle body 20 is provided with an oil inlet pipe 35 (see fig. 5 and 6), and the upper end of the oil inlet pipe is provided with a filter screen 21.
In this embodiment, the top of the middle body 20 is provided with an oil pumping diaphragm 25, and the oil pumping diaphragm 25 is provided with a tongue piece a241, a tongue piece B242 (shown in fig. 6 to 8), a pump membrane 32, a pulse cavity 26 and a pulse tube 28 (shown in fig. 5 to 7); the bottom of the middle body 20 is provided with a metering chamber 27 (shown in fig. 9).
In this embodiment, a lower sealing plate 31 is disposed between the lower body 30 and the middle body 20.
In this embodiment, the lower end of the lower body 30 is provided with an oil pumping ball 38 (see fig. 11).
Referring next to FIG. 10, a schematic diagram of the working oil circuit of the preferred embodiment of FIG. 1 adapted for use in a diaphragm carburetor at high temperatures in accordance with the present invention is shown.
The diaphragm carburetor of the invention has the following oil path during working: when the engine works, the pulse generated on the engine is introduced into the pulse cavity 26 of the carburetor through the pulse pipe 28 of fig. 5, the pump membrane 32 in the pulse cavity 26 is pushed to move up and down, so that the tongue piece A241 and the tongue piece B242 are pushed to move alternately, thereby generating suction force to suck fuel oil from the oil pot, the fuel oil is sucked into the metering cavity 27 of the carburetor from the oil inlet pipe 35 along the oil path shown in fig. B, c, d, e and a, then the fuel oil enters the oil inlet 16 on the lower cover of the body from the oil outlet 17 through the oil passage 18, the fuel oil is sprayed from the main nozzle 11 arranged on the body and mixed with air entering from the air inlet 14 to form mixed gas, and the mixed gas flows into the engine from the mixing chamber 12 on the body to be combusted and do work for the engine and output power outwards.
Referring finally to FIG. 11, a schematic illustration of yet another working oil circuit of the preferred embodiment of FIG. 1 adapted for use in a diaphragm carburetor of the present invention is shown in a high temperature condition.
The oil pumping ball 37 is added on the working oil path 30, the oil path 2 for returning the fuel oil from the metering cavity to the oil can is added on the lower body, and the oil pumping ball has the functions of: before the engine is started, the oil pumping ball 37 is squeezed by hand, vacuum suction is generated due to the deformation of the oil pumping ball 37 during squeezing, fuel is sucked out of the oil pot, the fuel enters from the oil inlet pipe 35 in the drawing a1 (or the drawing b1), passes through the metering cavities in the drawings 1 to c1, d1 and e1, then passes through the oil pumping ball 37 in the drawing f1 to the drawing g1 along the oil path 2, and finally the fuel returns to the oil pot from the oil return pipe 36 in the drawing g1, so that the process of sucking the fuel into the carburetor metering cavity 27 from the oil pot before the engine is started is completed, air in the carburetor metering cavity 27 is exhausted, the number of starting times of the engine is reduced, and the starting performance of the engine is improved.
Although the present invention has been disclosed in detail with reference to the accompanying drawings, it is to be understood that such description is merely illustrative and not restrictive of the application of the present invention. The scope of the present invention is defined by the appended claims, and may include various modifications, alterations, and equivalents made thereto without departing from the scope and spirit of the invention.
Claims (10)
1. The utility model provides a diaphragm formula carburetor suitable for under high temperature state, its includes upper part of the body (10) of carburetor, well body (20), lower part of the body (30) and diaphragm pump (24), is equipped with mixing chamber (12) in upper part of the body (10), its characterized in that: the upper body (10), the middle body (20) and the lower body (30) are all independently designed; the upper body (10) is connected with an engine, and the mixing chamber (12) is butted with an air inlet pipe of the engine.
2. A diaphragm carburetor according to claim 1, adapted for use at high temperatures, wherein: the middle body (20) comprises a middle body upper cover (22), a middle body sealing sheet (23), an oil pumping membrane (25), a pulse cavity (26), a metering cavity (27) and a pulse pipe (28).
3. A diaphragm carburetor according to claim 1, adapted for use at high temperatures, wherein: the diaphragm pump (24) consists of a middle body (20), a middle body upper cover (22), a middle body sealing sheet (23) and an oil pumping diaphragm (25).
4. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: the side of the middle body (20) is provided with a metering system (33) which consists of the middle body (20), a lower body sealing sheet (31), an oil absorption membrane (34) and a lower body (30).
5. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: a main nozzle (11) is arranged in the middle of the upper body (10) and is arranged at the lower end of the plunger (15); an air inlet (14) is formed in the left side of the middle part of the upper body (10); the lower end of the upper body (10) is provided with a lower body cover (13).
6. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: an oil inlet (16), an oil outlet (17) and an oil passage (18) are arranged between the upper body (10) and the middle body (20).
7. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: one side of the middle body (20) is provided with an oil inlet pipe (35), and the upper end of the oil inlet pipe is provided with a filter screen (21).
8. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: the top of the middle body (20) is provided with an oil pumping diaphragm (25), and the oil pumping diaphragm (25) is provided with a tongue piece A (241), a tongue piece B (242), a pumping film (32), a pulse cavity (26) and a pulse tube (28); the bottom of the middle body (20) is provided with a metering cavity (27).
9. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: a lower sealing sheet (31) is arranged between the lower body (30) and the middle body (20).
10. A diaphragm carburetor according to claim 1 or 2, adapted for use at high temperatures, wherein: the lower end of the lower body (30) is provided with an oil pumping ball (38).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2020219244831 | 2020-09-07 | ||
| CN202021924483 | 2020-09-07 | ||
| CN202010926492 | 2020-09-07 | ||
| CN2020109264922 | 2020-09-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112343738A true CN112343738A (en) | 2021-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011132120.9A Pending CN112343738A (en) | 2020-09-07 | 2020-10-21 | Diaphragm type carburetor suitable for high temperature state |
| CN202022354892.9U Active CN214424602U (en) | 2020-09-07 | 2020-10-21 | Diaphragm type carburetor suitable for high temperature state |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN202022354892.9U Active CN214424602U (en) | 2020-09-07 | 2020-10-21 | Diaphragm type carburetor suitable for high temperature state |
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| Country | Link |
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| CN (2) | CN112343738A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112343738A (en) * | 2020-09-07 | 2021-02-09 | 浙江瑞星化油器制造有限公司 | Diaphragm type carburetor suitable for high temperature state |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1279487A (en) * | 1968-08-19 | 1972-06-28 | Kabushiki Kaihsa Keihin Seiki | A carburettor assembly |
| GB1285570A (en) * | 1968-08-19 | 1972-08-16 | Keihin Seiki Mfg | Carburetter |
| CN1807868A (en) * | 2005-01-11 | 2006-07-26 | 沃尔布罗发动机使用有限责任公司 | Diaphragm carburetor and method of assembly |
| CN201671727U (en) * | 2010-05-12 | 2010-12-15 | 浙江瑞星化油器制造有限公司 | Diaphragm type carburetor with function of eliminating impulse chamber fuel oil accumulation |
| JP2015218672A (en) * | 2014-05-19 | 2015-12-07 | 株式会社マキタ | Engine and work machine |
| CN214424602U (en) * | 2020-09-07 | 2021-10-19 | 浙江瑞星化油器制造有限公司 | Diaphragm type carburetor suitable for high temperature state |
-
2020
- 2020-10-21 CN CN202011132120.9A patent/CN112343738A/en active Pending
- 2020-10-21 CN CN202022354892.9U patent/CN214424602U/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1279487A (en) * | 1968-08-19 | 1972-06-28 | Kabushiki Kaihsa Keihin Seiki | A carburettor assembly |
| GB1285570A (en) * | 1968-08-19 | 1972-08-16 | Keihin Seiki Mfg | Carburetter |
| CN1807868A (en) * | 2005-01-11 | 2006-07-26 | 沃尔布罗发动机使用有限责任公司 | Diaphragm carburetor and method of assembly |
| CN201671727U (en) * | 2010-05-12 | 2010-12-15 | 浙江瑞星化油器制造有限公司 | Diaphragm type carburetor with function of eliminating impulse chamber fuel oil accumulation |
| JP2015218672A (en) * | 2014-05-19 | 2015-12-07 | 株式会社マキタ | Engine and work machine |
| CN214424602U (en) * | 2020-09-07 | 2021-10-19 | 浙江瑞星化油器制造有限公司 | Diaphragm type carburetor suitable for high temperature state |
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| CN214424602U (en) | 2021-10-19 |
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Application publication date: 20210209 |