CN108571405B - Two-stroke air guide type engine air inlet system - Google Patents
Two-stroke air guide type engine air inlet system Download PDFInfo
- Publication number
- CN108571405B CN108571405B CN201710145919.3A CN201710145919A CN108571405B CN 108571405 B CN108571405 B CN 108571405B CN 201710145919 A CN201710145919 A CN 201710145919A CN 108571405 B CN108571405 B CN 108571405B
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- China
- Prior art keywords
- carburetor
- channel
- air inlet
- air
- inlet pipe
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- 238000005192 partition Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 11
- 230000002000 scavenging effect Effects 0.000 abstract description 15
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 30
- 239000003921 oil Substances 0.000 description 14
- 238000010586 diagram Methods 0.000 description 3
- 239000000446 fuel Substances 0.000 description 3
- 239000000295 fuel oil Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000010413 gardening Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
Classifications
-
- 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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/1015—Air intakes; Induction systems characterised by the engine type
- F02M35/1019—Two-stroke engines; Reverse-flow scavenged or cross scavenged engines
-
- 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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
-
- 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
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10242—Devices or means connected to or integrated into air intakes; Air intakes combined with other engine or vehicle parts
- F02M35/10262—Flow guides, obstructions, deflectors or the like
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Characterised By The Charging Evacuation (AREA)
- Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
Abstract
The invention discloses a two-stroke air-guide engine air inlet system, which comprises a carburetor, wherein the carburetor is connected with the carburetor through an air inlet pipe, the carburetor comprises a carburetor body and an air inlet channel arranged on the carburetor body, and the air inlet channel is divided into an independent carburetor pure air first channel, an independent carburetor pure air second channel and an independent carburetor combustible mixed gas channel through a rotary valve; the air inlet pipe is provided with an air inlet pipe pure air channel communicated with the carburetor pure air first channel and the carburetor pure air second channel and an air inlet pipe combustible mixed gas channel communicated with the carburetor combustible mixed gas channel. The invention has the beneficial effects that: the external appearance and the connection mode of the common carburetor are provided, so that the external appearance and the throttle control mechanism of the whole engine are not required to be changed, and the structure is simpler and the reliability is higher compared with the whole engine adopting the air inlet system of the conventional stratified scavenging engine.
Description
Technical Field
The invention relates to the technical field of engine equipment, in particular to an air inlet system of a two-stroke air guide type engine.
Background
The two-stroke engine has the remarkable advantages of compact structure, small volume, light weight, rapid running speed and the like, and is widely applied to various product fields such as agriculture, forestry, gardening, families and the like.
In the conventional two-stroke engine, an air inlet, an air outlet and a scavenging port are arranged on a cylinder body, the ports are opened or closed by the operation of a rotary valve, and fresh combustible gas mixture for scavenging is easy to be mixed with combusted exhaust gas in the scavenging process and discharged without being combusted or insufficiently combusted, so that the two-stroke engine has high fuel consumption and the exhaust gas contains a large amount of harmful components (such as HC and NO X And CO), the impact on atmospheric pollution is significant and, in addition, does not meet the current emissions regulations of various countries.
The existing stratified scavenging two-stroke gasoline engine has the characteristics of low emission and low oil consumption, is favored by vast consumers, but has the defects of complex structure of an air inlet system, poor reliability and high price of the whole engine.
Therefore, there is a need for an air intake system that has the characteristics of simple structure, high reliability, moderate price, high reliability, low emission, low fuel consumption, and effectively reduced cost, as in the case of a conventional two-stroke engine.
Disclosure of Invention
Aiming at the technical problems in the related art, the invention provides an air inlet system of a two-stroke air guide engine, which can effectively separate and supply mixed gas and pure air and reduce the emission of pollutants.
In order to achieve the technical purpose, the technical scheme of the invention is realized as follows:
the two-stroke air guide type engine air inlet system comprises a carburetor, wherein the carburetor is connected with the carburetor through an air inlet pipe, the carburetor comprises a carburetor body and an air inlet channel arranged on the carburetor body, and the air inlet channel is divided into an independent carburetor pure air first channel, an independent carburetor pure air second channel and an independent carburetor combustible mixed gas channel through a rotary valve; the air inlet pipe is internally provided with an air inlet pipe pure air channel communicated with the carburetor pure air first channel and the carburetor pure air second channel and an air inlet pipe combustible mixed gas channel communicated with the carburetor combustible mixed gas channel; the pure air channel of the air inlet pipe and the combustible mixed gas channel of the air inlet pipe are separated by an air inlet pipe partition board, the air inlet pipe partition board extends out of the air inlet pipe, and the end face shape of the air inlet pipe partition board is matched with the end face of the rotary valve.
Further, a rotating frame matched with the rotary valve is arranged on the carburetor body, an oil needle is arranged at the center of the rotary valve, an oil nozzle extending into a combustible mixed gas channel of the carburetor is further arranged on the carburetor body, and the oil needle is matched with the oil nozzle.
Further, a horizontal channel baffle plate is arranged in the rotary valve to divide the air inlet channel into two spaces which are independent from each other, wherein the two spaces comprise a pure air channel of the carburetor positioned above and a combustible mixed gas channel of the carburetor positioned below; the rotary valve is internally provided with a vertical channel baffle plate which divides the pure air channel of the carburetor into two spaces which are independent left and right, namely a first pure air channel of the carburetor and a second pure air channel of the carburetor.
Further, the pure air channel of the air inlet pipe is completely matched with the end face shape of the pure air channel of the carburetor.
Further, when the rotary valve rotates, the pure air channel of the air inlet pipe and the pure air channel of the carburetor are completely matched to be completely isolated, and the rotation angle of the rotary valve is 40-50 degrees.
The invention has the beneficial effects that: through the arranged stratified gas channels and stratified gas supply, the engine has the function of stratified scavenging, fresh air flowing in from the air channels is scavenged firstly during scavenging, and then combustible mixed gas flowing in from the mixed gas channels is scavenged, so that the escape of unburned combustible mixed gas is greatly reduced; the improved carburetor with the conventional rotary valve has the appearance and the connection mode of the conventional carburetor, so that the appearance and the throttle control mechanism of the whole carburetor are not required to be changed, and the structure is simpler and the reliability is higher compared with the whole carburetor adopting the conventional stratified scavenging engine air inlet system.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an air intake system of a two-stroke air-guided engine according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a carburetor according to an embodiment of the present invention.
FIG. 3 is a cross-sectional view of a carburetor according to an embodiment of the present invention.
Fig. 4 is a schematic diagram showing a rotation state of the rotary valve according to an embodiment of the present invention.
Fig. 5 is a second schematic diagram of a rotation state of the rotary valve according to an embodiment of the present invention.
FIG. 6 is a graph of rotary valve angle versus gas flow according to an embodiment of the present invention.
FIG. 7 is a graph of rotational speed versus gas flow according to an embodiment of the present invention.
In the figure:
1. a carburetor; 2. an air inlet pipe; 3. a carburetor body; 4. an air intake passage; 5. a rotary valve; 6. a carburetor pure air first passage; 7. a carburetor pure air second passage; 8. a carburetor combustible mixture passage; 9. a pure air channel of the air inlet pipe; 10. the air inlet pipe is a combustible mixed gas channel; 11. an air inlet pipe partition; 12. a rotating frame; 13. a horizontal channel separator; 14. a vertical channel separator; 15. a carburetor pure air passage; 16. an oil needle; 17. and an oil nozzle.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the invention, fall within the scope of protection of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1-3, an air intake system of a two-stroke air-guided engine according to an embodiment of the present invention includes a carburetor 1, wherein the carburetor 1 is connected with an air intake pipe 2, the carburetor 1 includes a carburetor body 3 and an air intake passage 4 disposed on the carburetor body 3, and the air intake passage 4 is separated into a carburetor pure air first passage 6, a carburetor pure air second passage 7 and a carburetor combustible mixture passage 8, which are independent through a rotary valve 5.
As shown in fig. 2, the carburetor body 3 is provided with a turret 12 that cooperates with the rotary valve 5. The carburetor body 3 is provided with a rotating frame 12 matched with the rotary valve 5, the center of the rotary valve 5 is provided with an oil needle 16, the carburetor body 3 is also provided with an oil nozzle 17 extending into the carburetor combustible mixed gas channel 8, and the oil needle 16 is matched with the oil nozzle 17.
A horizontal channel baffle 13 is arranged in the rotary valve 5 to divide the air inlet channel 4 into two spaces which are independent from each other, wherein the two spaces comprise a carburetor pure air channel 15 positioned above and a carburetor combustible gas channel 8 positioned below; the rotary valve 5 is also internally provided with a vertical channel baffle plate 14 which divides the pure air channel 15 of the carburetor into two spaces which are independent left and right and are respectively the pure air first channel 6 of the carburetor and the pure air second channel 7 of the carburetor.
The air inlet pipe 2 is provided with an air inlet pipe pure air channel 9 communicated with the carburetor pure air first channel 6 and the carburetor pure air second channel 7 and an air inlet pipe combustible mixed gas channel 10 communicated with the carburetor combustible mixed gas channel 8; the intake pipe pure air passage 9 and the intake pipe combustible mixture passage 10 are partitioned by an intake pipe partition plate 11, the intake pipe partition plate 11 extends out of the intake pipe 2, and the end face shape thereof is matched with the end face of the rotary valve 5.
As shown in fig. 4 and 5, the intake pipe pure air passage 9 is completely matched with the end face shape of the carburetor pure air passage 15. When the rotary valve 5 rotates, the pure air channel 9 of the air inlet pipe and the pure air channel 15 of the carburetor are completely matched to be completely isolated, and the rotation angle of the rotary valve 5 is 40-50 degrees.
In order to facilitate understanding of the above technical solutions of the present invention, the following describes the above technical solutions of the present invention in detail by a specific usage manner.
When the engine starts to operate, when the rotating frame 12 drives the rotating valve 5 to lift the oil needle by pulling the throttle rope, negative pressure is formed in the crankcase in the ascending process of the rotating valve 5, pure air flows into the cylinder body from the air filter, the carburetor and the upper and lower channels on the air inlet pipe under the action of atmospheric pressure, but as the oil nozzle of the carburetor is positioned in the lower channel (the combustible mixed gas channel 8) of the horizontal channel partition plate 13 of the channel 1 of the carburetor, the high-speed inflow pure air sucks the fuel oil out of the oil nozzle and rapidly atomizes the fuel oil to form combustible mixed gas, and the upper pure air channel 15 of the carburetor still is pure air because no fuel oil flows in.
At this time, the combustible mixture is sucked into the crankcase through the intake pipe combustible mixture passage 10 and the intake port, and at the same time, the pure air enters the air storage chamber on the cylinder body from the carburetor pure air passage 6, the intake pipe pure air passage 9 and the check valve, and enters the vicinity of the scavenging port of the cylinder body through the air passage communicated with the scavenging passage.
When the rotary valve 5 is close to the bottom dead center, part of waste gas is discharged to the atmosphere from the exhaust port through the muffler, the cylinder scavenging port is opened along with the further descending of the rotary valve 5, the compressed combustible mixed gas presses fresh air into the cylinder from the scavenging port through the cylinder scavenging port, at the moment, the fresh air is in front, the combustible mixed gas is in back, the combusted waste gas is discharged from the exhaust port, and the whole working process of layered scavenging is realized.
6-7, when the rotary valve rotates to enable the vertical channel partition plate to be in a horizontal position, the air inlet pipe pure air channel 9 and the carburetor pure air channel 15 are closed, the air inlet pipe combustible mixed gas channel 11 and the carburetor combustible mixed gas channel 8 are closed, air and mixed gas do not pass, and the engine is in idle running; as the rotary valve rotates in angle, the air-fuel mixture channel is opened, the pure air channel is closed, and the stratified scavenging air is provided for the engine body and corresponds to the low-medium speed range of the engine speed; with increasing rotation angle of the rotary valve, to 40 ° -50 °, preferably 45 °, the carburetor pure air first passage 6 starts to communicate with the intake pipe pure air passage 9, pure air enters the intake pipe, and after the engine speed exceeds the low-medium speed range, fresh air starts to be supplied.
Similarly, when the engine runs at idle speed, namely the throttle rope drives the rotating valve to move downwards, the pure air channel of the carburetor is basically in a closed state, and only the combustible gas mixture channel of the carburetor is opened, so that the engine can be ensured to be more stable at idle speed and better in acceleration performance.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (3)
1. The two-stroke air guide type engine air inlet system comprises a carburetor (1), wherein the carburetor (1) is connected with an air inlet pipe (2), and is characterized in that the carburetor (1) comprises a carburetor body (3) and an air inlet channel (4) arranged on the carburetor body (3), and the air inlet channel (4) is divided into an independent carburetor pure air first channel (6), an independent carburetor pure air second channel (7) and an independent carburetor combustible mixed gas channel (8) through a rotary valve (5); an air inlet pipe pure air channel (9) communicated with the carburetor pure air first channel (6) and the carburetor pure air second channel (7) and an air inlet pipe combustible mixed gas channel (10) communicated with the carburetor combustible mixed gas channel (8) are arranged in the air inlet pipe (2); the air inlet pipe pure air channel (9) and the air inlet pipe combustible gas mixture channel (10) are separated by an air inlet pipe partition board (11), the air inlet pipe partition board (11) extends out of the air inlet pipe (2), the end face shape of the air inlet pipe partition board is matched with the end face of the rotary valve (5), a rotating frame (12) matched with the rotary valve (5) is arranged on the carburetor body (3), an oil needle (16) is arranged at the center of the rotary valve (5), an oil nozzle (17) extending into the carburetor combustible gas mixture channel (8) is further arranged on the carburetor body (3), the oil needle (16) is matched with the oil nozzle (17), a horizontal channel partition board (13) is arranged in the rotary valve (5), and the air inlet channel (4) is separated into two spaces which are independent up and down, and the space comprises the carburetor pure air channel (15) located above and the carburetor combustible gas mixture channel (8) located below; a vertical channel baffle (14) is further arranged in the rotary valve (5), the pure air channel (15) of the carburetor is divided into two spaces which are independent left and right, namely a pure air first channel (6) of the carburetor and a pure air second channel (7) of the carburetor.
2. The two-stroke air-guided engine intake system according to claim 1, wherein the intake pipe pure air passage (9) completely coincides with the end face shape of the carburetor pure air passage (15).
3. The two-stroke air-guided engine intake system according to claim 2, wherein the intake pipe pure air passage (9) and the carburetor pure air passage (15) are completely engaged to be completely isolated from each other when the rotary valve (5) is rotated, and the rotary valve (5) is rotated by an angle of 40 ° -50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710145919.3A CN108571405B (en) | 2017-03-13 | 2017-03-13 | Two-stroke air guide type engine air inlet system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710145919.3A CN108571405B (en) | 2017-03-13 | 2017-03-13 | Two-stroke air guide type engine air inlet system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108571405A CN108571405A (en) | 2018-09-25 |
| CN108571405B true CN108571405B (en) | 2024-02-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710145919.3A Active CN108571405B (en) | 2017-03-13 | 2017-03-13 | Two-stroke air guide type engine air inlet system |
Country Status (1)
| Country | Link |
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| CN (1) | CN108571405B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113107662A (en) * | 2021-05-08 | 2021-07-13 | 永康市茂金园林机械有限公司 | Cylinder piston unit for stratified scavenging two-stroke engine |
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| CN101936242A (en) * | 2009-06-26 | 2011-01-05 | 安德烈亚斯.斯蒂尔两合公司 | Carburetor and two-stroke engine with a carburetor |
| CN102322333A (en) * | 2011-08-26 | 2012-01-18 | 山东华盛农业药械有限责任公司 | Two-stroke layered-scavenging engine |
| CN102392760A (en) * | 2011-08-26 | 2012-03-28 | 山东华盛农业药械有限责任公司 | Carburetor of two-stroke layered scavenging engine |
| CN202402171U (en) * | 2012-01-11 | 2012-08-29 | 浙江瑞星化油器制造有限公司 | Layered carburetor for diaphragm of rotary valve |
| CN103423033A (en) * | 2013-08-09 | 2013-12-04 | 浙江银龙机车部件有限公司 | Rotary valve type membrane carburetor |
| CN104314682A (en) * | 2014-09-03 | 2015-01-28 | 上海山科园林工具有限公司 | Two-stroke stratified scavenging gasoline engine |
| CN206816414U (en) * | 2017-03-13 | 2017-12-29 | 王廷高 | A kind of two-stroke air conduction engine aspirating system |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6257179B1 (en) * | 1999-04-28 | 2001-07-10 | Mitsubishi Heavy Industries, Ltd. | Two-stroke cycle engine |
| US9464605B2 (en) * | 2013-08-24 | 2016-10-11 | Lonn M. Peterson | Quad flow torque enhancement flow divider causing improved fuel/air transfer |
| JP6608676B2 (en) * | 2015-11-10 | 2019-11-20 | 株式会社やまびこ | Rotary carburetor for 2-stroke internal combustion engines |
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2017
- 2017-03-13 CN CN201710145919.3A patent/CN108571405B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936242A (en) * | 2009-06-26 | 2011-01-05 | 安德烈亚斯.斯蒂尔两合公司 | Carburetor and two-stroke engine with a carburetor |
| CN102322333A (en) * | 2011-08-26 | 2012-01-18 | 山东华盛农业药械有限责任公司 | Two-stroke layered-scavenging engine |
| CN102392760A (en) * | 2011-08-26 | 2012-03-28 | 山东华盛农业药械有限责任公司 | Carburetor of two-stroke layered scavenging engine |
| CN202402171U (en) * | 2012-01-11 | 2012-08-29 | 浙江瑞星化油器制造有限公司 | Layered carburetor for diaphragm of rotary valve |
| CN103423033A (en) * | 2013-08-09 | 2013-12-04 | 浙江银龙机车部件有限公司 | Rotary valve type membrane carburetor |
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| CN206816414U (en) * | 2017-03-13 | 2017-12-29 | 王廷高 | A kind of two-stroke air conduction engine aspirating system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108571405A (en) | 2018-09-25 |
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Effective date of registration: 20240117 Address after: 276000 Shibei Industrial Park, Zhimadun office, Linyi Economic and Technological Development Zone, Linyi City, Shandong Province Applicant after: LINYI ZHUXIN MACHINERY Co.,Ltd. Address before: Room 402, Unit 2, Building 4, No. 115 Customs Road, Lanshan District, Linyi City, Shandong Province, 276004 Applicant before: Wang Tinggao |
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