CN105840335B - Two stroke engine cylinder body enclosed scavenging path - Google Patents
Two stroke engine cylinder body enclosed scavenging path Download PDFInfo
- Publication number
- CN105840335B CN105840335B CN201610350596.7A CN201610350596A CN105840335B CN 105840335 B CN105840335 B CN 105840335B CN 201610350596 A CN201610350596 A CN 201610350596A CN 105840335 B CN105840335 B CN 105840335B
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- CN
- China
- Prior art keywords
- cylinder body
- scavenging
- enclosed
- enclosed scavenging
- air belt
- Prior art date
- 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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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F1/00—Cylinders; Cylinder heads
- F02F1/18—Other cylinders
- F02F1/22—Other cylinders characterised by having ports in cylinder wall for scavenging or charging
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B25/00—Engines characterised by using fresh charge for scavenging cylinders
- F02B25/20—Means for reducing the mixing of charge and combustion residues or for preventing escape of fresh charge through outlet ports not provided for in, or of interest apart from, subgroups F02B25/02 - F02B25/18
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B29/00—Engines characterised by provision for charging or scavenging not provided for in groups F02B25/00, F02B27/00 or F02B33/00 - F02B39/00; Details thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B2700/00—Measures relating to the combustion process without indication of the kind of fuel or with more than one fuel
- F02B2700/03—Two stroke engines
- F02B2700/037—Scavenging or charging channels or openings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The present invention relates to general small-size two stroke engine technical field, more particularly to a kind of layered scavenging two-stroke engine cylinder body enclosed scavenging path.The enclosed scavenging path includes enclosed scavenging air belt, the recess channels on cylinder body flange face and the thin plate that inlet channel is cooperatively formed with recess channels of cylinder body, recess channels are provided with the expanding channel of variable section structure, and enclosed scavenging air belt, recess channels, expanding channel are connected.The cylinder body enclosed scavenging path for cooperatively forming different length of cylinder body flange face through hole different from thin plate, the increase of enclosed scavenging air belt length is advantageous to the layering of pure air and gaseous mixture, the stability improve pure air guide cleaning tail gas stability, reduce the loss of gaseous mixture, improving gaseous mixture scavenging, improves scavenging speed, stable scavenging direction, can effectively improve power, high low-speed stability, the reduction exhaust emissions of engine.
Description
Technical field
The present invention relates to general small-size two stroke engine technical field, more particularly to a kind of layered scavenging two-stroke is started
Machine cylinder body enclosed scavenging path.
Background technology
Lower exhaust emissions limit has been formulated Small Universal two stroke engine in the countries and regions such as China, European Union, the U.S.
Value, more particularly, to brush cutter, chain saw, the hand-held tool product such as hair-dryer.Current hand-held tool mainly uses tail
Two methods of gas post-processing technology and guide's pure air layered scavenging technology are to reduce exhaust emissions.
At present, have in layered scavenging two-stroke engine using storage portion of air takes the lead in sweeping in advance in scavenging air belt
Gas, to reduce the phenomenon that gaseous mixture is expelled directly out without burning with waste gas, so as to effectively reduce the harmful components such as HC in tail gas
With CO compounds, environment is protected.Such as a kind of layered scavenging two-stroke gasoline engine cylinder bodies of ZL201520130727.1, there is section
Different big scavenging air belts and small scavenging air belt are accumulated, is provided with choke block in small scavenging air belt, air is stored in scavenging air belt through piston, is swept
Air enters cylinder body combustion chamber scavenging during gas, it is possible thereby to which it is unburned to reduce part existing for common two-stroke gasoline engine
The phenomenon that gaseous mixture is escaped with waste gas, effectively reduce the compound emission such as HC and CO in tail gas.But show by substantial amounts of experiment,
When engine is in and run at high speed, the air capacity of scavenging air belt memory storage is on the low side, not only has air during scavenging, also have part without
The gaseous mixture of burning participates in scavenging, therefore, the discharge of the compounds such as HC and CO can't be completely eliminated in tail gas, be unfavorable for
Environmental protection, therefore, a kind of storage gas of urgent need are more, beneficial to air and charge stratification, the enclosed scavenging road of path length.
The content of the invention
It is an object of the invention to provide one kind can increase enclosed scavenging air belt length, and simple in construction, mould can be realized, cost
Low, easy processing two stroke engine cylinder body enclosed scavenging path.
Technical scheme：A kind of two stroke engine cylinder body enclosed scavenging path, it is characterised in that：Including cylinder body
Enclosed scavenging air belt, the recess channels that are provided with of cylinder body flange face and overlay on cylinder body flange face cooperatively formed with recess channels into
The thin plate of gas passage；The recess channels are the variable section structure at least provided with an expanding channel, the enclosed scavenging air belt, recessed
Groove passage, expanding channel are connected.
Preferably, the enclosed scavenging air belt is separately positioned on the both sides of cylinder body, and per side at least provided with one.
Further, at least provided with a through hole on the thin plate.
Further, the through hole and the shape at enclosed scavenging road junction match.
Further, the shape of the through hole and expanding channel mouth matches.
Beneficial effect is：Bent axle can be achieved by the lamellar part with the use of different openings position in the scavenging path
The gaseous mixture of case enters scavenging air belt path from diverse location, and then enters enclosed scavenging air belt, eventually enters into cylinder body combustion chambers burn,
To realize the increase of enclosed scavenging air belt length, experiment proves that the increase of enclosed scavenging air belt length is advantageous to pure air and gaseous mixture
Layering, improve pure air guide cleaning tail gas stability, reduce the loss of gaseous mixture, improve the stability of gaseous mixture scavenging, carry
High scavenging speed, stable scavenging direction, power, high low-speed stability, the reduction exhaust emissions of engine can be effectively improved.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the present invention, originally shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.
Fig. 1 is the scavenging path schematic diagram on cylinder body flange face；
Fig. 2 is a kind of thin plate schematic diagram of aperture position；
Fig. 3 is the enclosed scavenging air belt path schematic diagram of thin plate shown in Fig. 2 and the scavenging path cooperation composition of Fig. 1 cylinder bodies and mixed
Close gas and flow to schematic diagram in path；
Fig. 4 is a kind of thin plate schematic diagram of aperture position；
Fig. 5 is the enclosed scavenging air belt path schematic diagram of thin plate shown in Fig. 4 and the scavenging path cooperation composition of Fig. 1 cylinder bodies and mixed
Close gas and flow to schematic diagram in path；
Fig. 6 is a kind of thin plate schematic diagram of aperture position；
Fig. 7 is the enclosed scavenging air belt path schematic diagram of thin plate shown in Fig. 6 and the scavenging path cooperation composition of Fig. 1 cylinder bodies and mixed
Close gas and flow to schematic diagram in path；
Fig. 8 is that gaseous mixture flows to schematic diagram by the enclosed scavenging air belt on cylinder body into cylinder body；
Number explanation in accompanying drawing：1st, cylinder body；2a, 2b, enclosed scavenging air belt；3a, 3b, recess channels；4a, 4b, expanding channel；
5th, cylinder body flange face；6th, 7,8, thin plate；6a, 7b, 8a, 8b, thin plate opening.
Embodiment
As shown in Fig. 1~Fig. 8, the two stroke engine cylinder body enclosed scavenging path, include the enclosed scavenging air belt of cylinder body 1
Recess channels 3a, 3b on 2a, 2b, cylinder body flange face 5（Including expanding channel 4a, 4b）, thin plate 6,7,8（Including thin plate opening
6a、7b、8a、8b）.
Enclosed scavenging air belt 2a, 2b are located at the both sides of cylinder body 1, and recess channels 3a, 3b are located on cylinder body flange face, expanding channel
4a, 4b are the variable section structures of recess channels 3a, 3b, enclosed scavenging air belt 2a, 2b, recess channels 3a, 3b, expanding channel 4a, 4b
It is connected.
Thin plate 6,7,8 is provided with least one thin plate opening 6a, 7b, 8a, 8b, and thin plate 6,7,8 is covered in cylinder body flange face 5
On, swept respectively with recess channels 3a, 3b, expanding channel 4a, 4b, the cylinder body enclosed that enclosed scavenging air belt 2a, 2b form different length
Gas path.
Specific work process：First embodiment：When thin plate 6 is covered on cylinder body flange face 5, thin plate opening 6a is swept with enclosed
When air flue 2a matches, the gaseous mixture in crankcase is partly into enclosed scavenging air belt 2a, another part by thin plate opening 6a
Respectively along recess channels 3b → expanding channel 4b → recess channels 3b → enter enclosed scavenging air belt 2b, and along recess channels 3a → expansion
Zhang Tongdao 4a → recess channels 3a → enter enclosed scavenging air belt 2b, finally enter cylinder body, to increase the length of enclosed scavenging path
Degree.
Second embodiment：When thin plate 7 is covered on cylinder body flange face 5, thin plate opening 7b matches with enclosed scavenging air belt 2b
When, the gaseous mixture in crankcase is partly into enclosed scavenging air belt 2b by thin plate opening 7b, and another part leads to along groove respectively
Road 3b → expanding channel 4b → recess channels 3b → enter enclosed scavenging air belt 2a, and along recess channels 3a → expanding channel 4a → recessed
Groove passage 3a → enter enclosed scavenging air belt 2a, finally enters cylinder body, to increase the length of enclosed scavenging path.
3rd embodiment：When thin plate 8 is covered on cylinder body flange face 5, thin plate opening 8a, 8b respectively with expanding channel 4a,
When 4b matches, the gaseous mixture in crankcase is partly into thin plate opening 8a, by thin plate opening 8a → expanding channel 4a →
Recess channels 3a → enclosed scavenging air belt 2a；With pass through thin plate opening 8a → expanding channel 4a → recess channels 3a → enclosed scavenging air belt
2b；Gaseous mixture another part in crankcase enters thin plate opening 8b, is led to by thin plate opening 8b → expanding channel 4b → groove
Road 3b → enclosed scavenging air belt 2a；With pass through thin plate opening 8b → expanding channel 4b → recess channels 3b → enclosed scavenging air belt 2b.Most
Whole gaseous mixture all enters cylinder body, to increase the length of enclosed scavenging path.
Finally, for gaseous mixture respectively by enclosed scavenging air belt 2a, enclosed scavenging air belt 2b, which enters in cylinder body 1, completes scavenging work.
Beneficial effect is：Bent axle can be achieved by the lamellar part with the use of different openings position in the scavenging path
The gaseous mixture of case enters scavenging air belt path from diverse location, and then enters enclosed scavenging air belt, eventually enters into cylinder body combustion chambers burn,
To realize the increase of enclosed scavenging path-length, experiment proves that the increase of enclosed scavenging path-length is advantageous to pure air with mixing
The layering of gas, improve the loss that pure air guide clears away tail gas stability, reduction gaseous mixture, reduce exhaust emissions, protect ring
Border.
Although the structure to the implementation present invention, method are described in detail above, the present invention is not limited to this,
In the range of the technological thought of the present invention and purpose is not departed from, those skilled in the art can be in shape, size, Qi Taxiang
In terms of fine texture, modification is carried out to the embodiment, modification is done and is still included in the present invention.
Claims (2)
- A kind of 1. two stroke engine cylinder body enclosed scavenging path, it is characterised in that：Enclosed scavenging air belt, cylinder body method including cylinder body The recess channels and overlay on cylinder body flange face the thin plate that inlet channel is cooperatively formed with recess channels that blue face is provided with；It is described recessed Groove passage is the variable section structure at least provided with an expanding channel, and the enclosed scavenging air belt, recess channels, expanding channel are connected It is logical；Match on the thin plate at least provided with a through hole, the through hole and the shape at enclosed scavenging road junction, or the through hole with The shape of expanding channel mouth matches.
- 2. two stroke engine cylinder body enclosed scavenging path according to claim 1, it is characterised in that：The enclosed scavenging Road is separately positioned on the both sides of cylinder body, and per side at least provided with one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610350596.7A CN105840335B (en) | 2016-05-25 | 2016-05-25 | Two stroke engine cylinder body enclosed scavenging path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610350596.7A CN105840335B (en) | 2016-05-25 | 2016-05-25 | Two stroke engine cylinder body enclosed scavenging path |
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| Publication Number | Publication Date |
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| CN105840335A CN105840335A (en) | 2016-08-10 |
| CN105840335B true CN105840335B (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610350596.7A Active CN105840335B (en) | 2016-05-25 | 2016-05-25 | Two stroke engine cylinder body enclosed scavenging path |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285995B (en) * | 2016-10-08 | 2018-09-25 | 山东华盛农业药械有限责任公司 | Two stroke engine enclosed scavenging access |
| CN109826719A (en) * | 2019-03-20 | 2019-05-31 | 山东华盛农业药械有限责任公司 | Two-stroke gasoline engine cylinder body |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2376543Y (en) * | 1999-07-09 | 2000-05-03 | 郭旭鹏 | Cylinder with six scavenge trunks for motorcycle engine |
| CN200952421Y (en) * | 2006-09-13 | 2007-09-26 | 山东华盛农业药械股份有限公司 | Two-stroke petrol engine |
| US8770159B2 (en) * | 2008-09-24 | 2014-07-08 | Makita Corporation | Stratified scavenging two-stroke engine |
| DE102009059143B4 (en) * | 2009-12-19 | 2020-01-23 | Andreas Stihl Ag & Co. Kg | Two-stroke engine and sand core for the production of a two-stroke engine |
| DE102009059145A1 (en) * | 2009-12-19 | 2011-06-22 | Andreas Stihl AG & Co. KG, 71336 | internal combustion engine |
| CN204511684U (en) * | 2015-03-09 | 2015-07-29 | 山东华盛农业药械有限责任公司 | A kind of layered scavenging two-stroke gasoline engine cylinder body |
| CN104929797A (en) * | 2015-07-02 | 2015-09-23 | 浙江天泰机械有限公司 | Two-stroke engine cylinder and two-stroke engine |
| CN205779284U (en) * | 2016-05-25 | 2016-12-07 | 山东华盛农业药械有限责任公司 | A kind of two stroke engine cylinder body enclosed scavenging path |
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| CN105840335A (en) | 2016-08-10 |
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Denomination of invention: Closed scavenging passage of cylinder block of two-stroke engine Effective date of registration: 20211230 Granted publication date: 20180216 Pledgee: China Construction Bank Corporation Linyi Luozhuang sub branch Pledgor: SHANDONG HUASHENG PESTICIDE MACHINERY Co.,Ltd. Registration number: Y2021980017162 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
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Date of cancellation: 20230829 Granted publication date: 20180216 Pledgee: China Construction Bank Corporation Linyi Luozhuang sub branch Pledgor: SHANDONG HUASHENG PESTICIDE MACHINERY Co.,Ltd. Registration number: Y2021980017162 |