CN108180094B - Built-in tiltable general gasoline engine fuel supply system - Google Patents
Built-in tiltable general gasoline engine fuel supply system Download PDFInfo
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- CN108180094B CN108180094B CN201810040508.2A CN201810040508A CN108180094B CN 108180094 B CN108180094 B CN 108180094B CN 201810040508 A CN201810040508 A CN 201810040508A CN 108180094 B CN108180094 B CN 108180094B
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- fuel
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- supply system
- float chamber
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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
- F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
- F02M37/0076—Details of the fuel feeding system related to the fuel tank
- F02M37/0088—Multiple separate fuel tanks or tanks being at least partially partitioned
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a built-in tiltable general gasoline engine fuel oil supply system, which comprises a main body, a float chamber, a float, a main spray pipe and a main air channel, wherein the float chamber, the float, the main spray pipe and the main air channel are respectively connected to the main body, fuel oil is stored in the float chamber, the oil level of the fuel oil is lower than that of the main spray pipe and the main air channel, the main body also comprises a built-in oil storage cavity, the oil storage cavity is communicated with the float chamber, and the arrangement position of the oil storage cavity is higher than that of. The fuel supply system of the invention is additionally provided with an oil storage cavity which is communicated with the float chamber and is higher than the float chamber. When the fuel oil in the float chamber is inclined, the fuel oil in the float chamber enters the oil storage cavity, the height of the fuel oil in the float chamber is kept lower than that of the main spray pipe and the main air channel, and the fuel oil is prevented from leaking from the main spray pipe and the main air channel due to the inclination. The fuel storage space designed on the original fuel supply system body is built-in, has small change of the external dimension and practical functions, and has the advantages of safe use, low cost, stable and reliable structure and the like.
Description
Technical Field
The invention relates to a gasoline engine fuel supply system, in particular to a general gasoline engine fuel supply system which can incline without oil leakage.
Background
The general gasoline engine is mainly applied to generator sets, garden machinery, agriculture and forestry machinery and the like, and as shown in fig. 1a and fig. 1b, a structural schematic diagram of a fuel supply system of the general gasoline engine is shown. The fuel supply system 10 of the general gasoline engine includes an oil inlet hole 11, a float chamber 12, a float 13, a main air passage 14, a main nozzle 15, and a main orifice 17. The fuel 16 enters the float chamber 12 from the fuel inlet pipe through the needle valve seat, and the opening and closing of the needle valve are controlled in the float chamber 12 through the buoyancy action of the float 13, so that the liquid level of the fuel 16 is stabilized at a certain height. When the engine works, negative pressure is generated in the cylinder through the reciprocating motion of the piston to suck oil-gas mixture from a fuel supply system, as shown in figure 1a, fuel oil 16 is sucked into a throat from a float chamber 12 through an oil inlet hole 11, a main metering hole 17 and a main nozzle 15 and is mixed with air to enter a combustion chamber. The main air passage 14 communicating with the main nozzle 15 communicates with the outside atmosphere to supply air to the main nozzle 15 and atomize the fuel.
The fuel supply system of a general gasoline engine is in a vertical state, but once tilting occurs, the level of fuel 16 in the float chamber 12 rises, and when the level of fuel 16 is too high, leakage occurs from the main nozzle 15 and the main air passage 14. As shown in FIG. 1b, because the fuel 16 in the float chamber 12 is more and the main nozzle 15 and the main air passage 14 are both communicated with the cylinder of the engine or the outside, when the engine is inclined to the right, the fuel 16 in the float chamber 12 flows from the left side to the right side, the liquid level of the fuel 15 rises in the float chamber 12, and when the liquid level is inclined to a certain degree and is higher than the orifices of the main nozzle 15 and the main air passage 14, the fuel leaks. Leakage, once tilting occurs, not only is fuel wasted, but also excessive fuel entering the engine combustion chamber can cause the engine to drown and fail to start. If the fuel leaks to the outside, not only the environment is polluted, but also great potential safety hazards exist.
Disclosure of Invention
Based on the defects of the general gasoline engine fuel supply system, the built-in storage space is designed at the position, higher than the fuel liquid level of the float chamber, of the raw fuel supply system body, fuel in the float chamber can flow into the built-in storage space when the raw fuel supply system body is inclined, the fuel liquid level in the float chamber is reduced, the fuel liquid level in the float chamber is kept lower than the main spray pipe and the main air channel orifice, and fuel leakage caused by inclination is avoided. The fuel storage space designed on the original fuel supply system body is built-in, has small change of the external dimension and practical functions, and has the advantages of safe use, low cost, stable and reliable structure and the like.
In order to achieve the purpose, the built-in tiltable general gasoline engine fuel supply system comprises a main body, and a float chamber, a float, a main spray pipe and a main air channel which are respectively connected to the main body, wherein fuel is stored in the float chamber, the oil level of the fuel is lower than that of the main spray pipe and the main air channel, the main body further comprises a built-in oil storage cavity, the oil storage cavity is communicated with the float chamber, and the arrangement position of the oil storage cavity is higher than that of the float chamber.
In an embodiment of the internal tiltable general gasoline engine fuel supply system, the fuel supply system comprises a tilting side, and the oil storage chamber is arranged on the tilting side.
In an embodiment of the above built-in tiltable general gasoline engine fuel supply system, the oil storage chamber includes a body and a pressure plate, a space between the body and the pressure plate forms a cavity, and the cavity is communicated with the float chamber.
In an embodiment of the fuel supply system of the built-in tiltable general gasoline engine, the body and the pressure plate are sealed by a sealing ring.
In an embodiment of the above-mentioned internal tiltable general gasoline engine fuel supply system, the main nozzle includes a main nozzle passage, the main nozzle passage includes an oil inlet, and the oil inlet communicates the main nozzle passage with the oil storage chamber.
In an embodiment of the above-mentioned internal tiltable general gasoline engine fuel supply system, the fuel inlet is provided at a side of the main fuel pipe passage close to the tilted side.
In an embodiment of the fuel supply system of the internal tiltable general gasoline engine, an oil inlet hole is not arranged on one side of the main jet pipe channel far away from the tilted side.
In one embodiment of the internal tiltable general gasoline engine fuel supply system described above, the main air passage is provided on a side opposite to the tilted side.
The built-in tiltable general gasoline engine fuel supply system has the beneficial effects that the fuel storage cavity is additionally arranged on the main body, and is communicated with the float chamber and is higher than the float chamber. When the fuel oil in the float chamber is inclined, the fuel oil in the float chamber enters the oil storage cavity, the height of the fuel oil in the float chamber is kept lower than that of the main spray pipe and the main air channel, and the fuel oil is prevented from leaking from the main spray pipe and the main air channel due to the inclination. The invention has the advantages of safe use, simple structure, stability, reliability and the like.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
FIGS. 1a and 1b are schematic structural diagrams of a fuel supply system of a general gasoline engine in the prior art;
FIG. 2 is a schematic perspective view of the tiltable universal gasoline engine fuel supply system of the present invention;
FIG. 3 is a schematic diagram of a partial cross-sectional perspective view of the tiltable universal gasoline engine fuel supply system of the present invention;
FIG. 4 is a schematic cross-sectional view of the tiltable universal gasoline engine fuel supply system of the present invention (not tilted);
FIG. 5 is a schematic cross-sectional view (tilted at an angle) of the tiltable universal gasoline engine fuel supply system of the present invention;
FIG. 6 is a schematic cross-sectional view of the tiltable universal gasoline engine fuel supply system of the present invention (tilted 90 degrees);
fig. 7 is a schematic perspective view of another embodiment of the tiltable universal gasoline engine fuel supply system of the present invention.
Wherein the reference numerals
In the prior art:
10 general gasoline engine fuel supply system
11 oil inlet
12 float chamber
13 float
14 main air channel
15 main nozzle
16 fuel oil
17 main orifice
In the invention:
20-inclinable general gasoline engine fuel supply system
21 float chamber
22 float
23 Main nozzle
23a main jet channel
23b oil inlet hole
24 main air channel
25 fuel oil
26 oil storage chamber
261 main body
262 pressure plate
263 communication channel
264 sealing ring
S inclined side
C cavity
Detailed Description
The following detailed description of the embodiments of the present invention with reference to the drawings and specific examples is provided for further understanding the objects, aspects and effects of the present invention, but not for limiting the scope of the appended claims.
As shown in fig. 2 to 4, the fuel supply system 20 of the built-in tiltable general gasoline engine of the present invention includes a main body, and a float chamber 21, a float 22, a main nozzle 23, and a main air passage 24 respectively connected to the main body, wherein fuel 25 is stored in the float chamber 21, and the fuel 25 has a lower level than the main nozzle 23 and the main air passage 24 (see fig. 7). The structure and operation of the same parts as those of the prior art will not be described in detail herein.
The built-in inclinable general gasoline engine fuel supply system 20 further comprises a built-in oil storage cavity 26, wherein the oil storage cavity 26 is communicated with the float chamber 21, and the arrangement position of the oil storage cavity 26 is higher than that of the float chamber 21. The invention designs a built-in storage space on the main body of the crude fuel supply system at a position higher than the fuel liquid level of the float chamber. I.e. the built-in storage space is formed integrally with the main body. The space is communicated with the float chamber, fuel in the float chamber can flow into the storage space when the float chamber is inclined, the purpose of reducing the fuel level in the float chamber is achieved, the fuel level in the float chamber is kept not higher than the main nozzle and the main air channel orifice, and the fuel cannot leak when the float chamber is inclined. Not only saves fuel oil, avoids environmental pollution, but also eliminates potential safety hazard. And the whole size is not greatly changed, thus being beneficial to installation.
Specifically, as shown in fig. 4, normally, the fuel 25 is maintained at a certain working height in the float chamber 21 by the buoyancy of the float 22, and the fuel 25 does not enter the reservoir chamber 26.
As shown in fig. 5, when the fuel supply system of the general gasoline engine is inclined, the fuel 25 enters the reservoir chamber 26 from the float chamber 21, and the level of the fuel 25 in the float chamber 21 is kept lower than the main nozzle 23 and the main air passage 24, thereby preventing the fuel 25 from leaking from the main nozzle 23 and the main air passage 24 due to the inclination.
Specifically, as shown in fig. 4 and 5, the built-in tiltable general gasoline engine fuel supply system 20 of the present invention includes a tilting side S, and the position height of the tilting side S is lowered when the built-in tiltable general gasoline engine fuel supply system 20 is tilted to the tilting side S, that is, tilted in the illustrated tilting direction. The oil storage chamber 26 is arranged on the inclined side S, and when the inclined side S inclines, the height of the oil storage chamber 26 is reduced, the fuel oil 25 circulates to the oil storage chamber 26, and the oil level is guaranteed not to exceed the height of the main pipe 23 and the height of the main air channel 24.
As shown in fig. 2 and 3, the reservoir chamber 26 includes a body 261 and a pressure plate 262, and a space between the body 261 and the pressure plate 262 forms a chamber C in which the reservoir chamber 26 stores the fuel 25. The oil chamber 26 further includes a communication passage 263, and the communication passage 263 communicates the chamber C with the float chamber 21, so that the fuel 25 enters the chamber C through the communication passage 263 in the float chamber 21 when tilting occurs.
As shown in fig. 1, a conventional fuel supply system 10 has two fuel inlets 11, and if an inclination occurs, one of the two fuel inlets is necessarily located above, and the other is located below, and fuel in the upper end fuel inlet and the main nozzle passage flows back downward during the inclination, so that the backflow resistance is large.
As shown in fig. 5 and 6, the main nozzle passage 23a of the main nozzle 23 of the internal tiltable general gasoline engine fuel supply system 20 of the present invention is provided with an oil inlet hole 23b, and the oil inlet hole 23b communicates the main nozzle passage 23a with the oil storage chamber 26. Further, the oil inlet hole 23b is provided on a side of the main jet passage 23a close to the inclined side S. The main jet passage 23a is not provided with an oil inlet on the side away from the inclined side S. That is, the present invention eliminates the upward oil inlet hole when it is inclined, so that the oil 26 in the main nozzle passage 23a flows back more smoothly and quickly.
As shown in FIG. 6, the present invention can be built in such a way that the fuel 25 is lower than the inlet port 23b and the angle of inclination is greater than 90 deg. Even if the fuel 25 is contained in the fuel bowl 21, the fuel will not leak when the fuel bowl is inclined during transportation or placement. The invention has simple structure and safe use.
In a preferred embodiment of the present invention, in order to prevent a small amount of fuel from leaking from the main air passage 24 due to inertia of a part of the remaining fuel in the passage of the main nozzle 23 flowing into the main air passage 24 at the time of tilting, the present invention moves the main air passage 24 to the left, i.e., moves the main air passage 24 to the side opposite to the tilting side S, i.e., positions the main air passage 24 to the side opposite to the fuel storage chamber 26, as shown in fig. 7. When the fuel oil is inclined according to the direction shown in the figure, the fuel oil flows to the oil storage cavity 26 on the inclined side S, the fuel oil level on one side of the main air channel 24 is lowered, the main air channel 24 on the opposite side of the inclined side S is always higher than the fuel oil level and is positioned above the channel of the main spray pipe 23, the fuel oil cannot leak from the main air channel 24 all the time, and the leakage event is further avoided.
The direction of the inclined side S is only an example, and according to different engine structures and application terminals, when the inclined directions are opposite, a fuel storage space can be designed on the other side, so that leakage is avoided.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (5)
1. A built-in tiltable general gasoline engine fuel oil supply system comprises a main body, a float chamber, a float, a main spray pipe and a main air channel which are respectively connected with the main body, fuel oil is stored in the float chamber, the oil level of the fuel oil is lower than that of the main nozzle and the main air passage, the main nozzle comprises a main nozzle passage, the main nozzle passage comprises an oil inlet hole, it is characterized in that the main body also comprises a built-in oil storage cavity, the oil storage cavity is communicated with the float chamber, the setting position of the oil storage cavity is higher than that of the float chamber, wherein the fuel supply system includes an inclined side, the oil reservoir chamber is provided on the inclined side, the oil inlet is arranged on one side, close to the inclined side, of the main nozzle channel, and the oil inlet is not arranged on one side, far away from the inclined side, of the main nozzle channel.
2. The built-in tiltable general gasoline engine fuel supply system according to claim 1, wherein the oil storage chamber comprises a body and a pressure plate, and a space between the body and the pressure plate forms a cavity which is communicated with the float chamber.
3. The fuel supply system of the built-in inclinable universal gasoline engine as claimed in claim 2, wherein the body and the pressure plate are sealed by a sealing ring.
4. The fuel supply system of the built-in tiltable general gasoline engine as claimed in claim 1, wherein the fuel inlet communicates the main fuel pipe passage and the fuel storage chamber.
5. The built-in tiltable universal gasoline engine fuel supply system according to claim 1, wherein said main air passage is provided at a side opposite to said tilted side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/102729 WO2019042278A1 (en) | 2017-08-28 | 2018-08-28 | Built-in tiltable general fuel oil supply system for gasoline engine |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710751464X | 2017-08-28 | ||
| CN201710751464 | 2017-08-28 |
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| Publication Number | Publication Date |
|---|---|
| CN108180094A CN108180094A (en) | 2018-06-19 |
| CN108180094B true CN108180094B (en) | 2020-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810040508.2A Active CN108180094B (en) | 2017-08-28 | 2018-01-16 | Built-in tiltable general gasoline engine fuel supply system |
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| Country | Link |
|---|---|
| CN (1) | CN108180094B (en) |
| WO (1) | WO2019042278A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108180094B (en) * | 2017-08-28 | 2020-07-03 | 华益机电有限公司 | Built-in tiltable general gasoline engine fuel supply system |
| CN116163869B (en) * | 2023-03-15 | 2024-05-14 | 一汽解放汽车有限公司 | Exhaust structure, fuel filter and vehicle |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3711216B2 (en) * | 1999-09-28 | 2005-11-02 | 株式会社クボタ | Engine carburetor |
| JP2009047037A (en) * | 2007-08-17 | 2009-03-05 | Nikki Co Ltd | Carburetor for outboard motor |
| CN202165178U (en) * | 2011-07-08 | 2012-03-14 | 陈俭敏 | Universal gasoline engine carburetor and oil system structure thereof |
| CN204299723U (en) * | 2014-12-04 | 2015-04-29 | 苏州圆能动力科技有限公司 | A kind of Carburetor overturning-preventing structure based on external fuel oil container |
| CN104454243B (en) * | 2014-12-04 | 2017-04-19 | 苏州圆能动力科技有限公司 | Anti-toppling carburetor structure based on external fuel oil container |
| CN207905969U (en) * | 2017-08-28 | 2018-09-25 | 华益机电有限公司 | Built-in tiltable general gasoline engines fuel oil supply system |
| CN108180094B (en) * | 2017-08-28 | 2020-07-03 | 华益机电有限公司 | Built-in tiltable general gasoline engine fuel supply system |
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2018
- 2018-01-16 CN CN201810040508.2A patent/CN108180094B/en active Active
- 2018-08-28 WO PCT/CN2018/102729 patent/WO2019042278A1/en active Application Filing
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| Publication number | Publication date |
|---|---|
| CN108180094A (en) | 2018-06-19 |
| WO2019042278A1 (en) | 2019-03-07 |
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