CN105840335A - Closed scavenging channel with cylinder body for two-stroke engines - Google Patents
Closed scavenging channel with cylinder body for two-stroke engines Download PDFInfo
- Publication number
- CN105840335A CN105840335A CN201610350596.7A CN201610350596A CN105840335A CN 105840335 A CN105840335 A CN 105840335A CN 201610350596 A CN201610350596 A CN 201610350596A CN 105840335 A CN105840335 A CN 105840335A
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- scavenging
- enclosed
- channels
- 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
-
- 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
Landscapes
- 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 invention relates to the technical field of universal small two-stroke engines, in particular to a closed scavenging channel with a cylinder body for stratified scavenging two-stroke engines. The closed scavenging channel comprises closed scavenging ways with the cylinder body, groove channels in the flange surface of the cylinder body and sheets matched with the groove channels for forming gas inlet channels; the groove channels are provided with expansion channels of variable-section structures; the closed scavenging ways, the groove channels and the expansion channels communicate with one another. The flange surface of the cylinder body and different through holes in the sheets are matched for forming the length-changeable closed scavenging channel with the cylinder body; by increasing the length of the closed scavenging channel, stratifying of pure air and mixed gas can be promoted, the stability of carrying out early scavenging on tail gas by the pure air can be improved, loss of the mixed gas can be reduced, the scavenging stability of the mixed gas can be improved, the scavenging speed can be increased, the scavenging direction can be stabilized, the power and the stability at high speed and low speed of the engines can be effectively improved, and tail gas emission can be reduced.
Description
Technical field
The present invention relates to general small-size two stroke engine technical field, start particularly to a kind of layered scavenging two-stroke
Machine cylinder body enclosed scavenging path.
Background technology
Lower exhaust emissions limit formulated by Small Universal two stroke engine by the countries and regions such as China, European Union, the U.S.
Value, the hand-held tool product such as the brush cutter that especially relates to, chain saw, hair-dryer.Current hand-held tool mainly uses tail
Gas post-processing technology and guide's two kinds of methods of pure air stratification scavenging techniques are to reduce exhaust emissions.
At present, layered scavenging two-stroke engine has employing store portion of air in scavenging air belt in advance to take the lead in sweeping
Gas, to reduce the phenomenon that gaseous mixture is expelled directly out with waste gas without burning, thus effectively reduces the harmful components such as HC in tail gas
With CO compound, protect environment.Such as ZL201520130727.1 layered scavenging two-stroke gasoline engine cylinder body, there is cross section
Long-pending different big scavenging air belt and little scavenging air belt, be provided with choke block in little scavenging air belt, air, in piston is stored in scavenging air belt, is swept
During gas, air enters cylinder body combustor scavenging, and the part that thus can reduce the existence of common two-stroke gasoline engine is unburned
The phenomenon that gaseous mixture is escaped with waste gas, effectively reduces in tail gas the compound emission such as HC and CO.But show through substantial amounts of test,
When electromotor is in and runs up in scavenging air belt storage air capacity on the low side, not only have 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, be unfavorable in tail gas
Environmental conservation, therefore, is badly in need of one storage gas many, beneficially air and charge stratification, the enclosed scavenging road of path length.
Summary of the invention
It is an object of the invention to provide one and can increase enclosed scavenging air belt length, and simple in construction, mould can realize, cost
The two stroke engine cylinder body enclosed scavenging path of processing low, easy.
Technical scheme: a kind of two stroke engine cylinder body enclosed scavenging path, it is characterised in that: include cylinder body
Enclosed scavenging air belt, the recess channels that is provided with of cylinder body flange face and overlaying on cooperatively form with recess channels on cylinder body flange face into
The thin plate of gas passage；Described recess channels is the variable section structure at least provided with an expanding channel, described enclosed scavenging air belt, recessed
Groove passage, expanding channel are connected.
Preferably, described enclosed scavenging air belt is separately positioned on the both sides of cylinder body, and every side is at least provided with one.
Further, at least provided with a through hole on described thin plate.
Further, described through hole and the mating shapes at enclosed scavenging road junction.
Further, described through hole and the mating shapes of expanding channel mouth.
Provide the benefit that: this scavenging path, by the lamellar parts with the use of different openings position, can realize bent axle
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 increasing of enclosed scavenging air belt length is conducive to pure air and gaseous mixture
Layering, improve pure air guide clear away tail gas stability, reduce gaseous mixture loss, improve gaseous mixture scavenging stability, carry
High scavenging speed, stablize scavenging direction, the power of electromotor, high low-speed stability can be effectively improved, reduce exhaust emissions.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the present invention, originally shows
Meaning property embodiment and explanation thereof are used for explaining the present invention, are not intended that inappropriate limitation of the present invention.
Fig. 1 is the scavenging path schematic diagram on cylinder body flange face；
Fig. 2 is the thin plate schematic diagram of a kind of aperture position；
Fig. 3 is that thin plate shown in Fig. 2 coordinates the enclosed scavenging air belt path schematic diagram and gaseous mixture constituted with the scavenging path of Fig. 1 cylinder body
Schematic diagram is flowed in path；
Fig. 4 is the thin plate schematic diagram of a kind of aperture position；
Fig. 5 is that thin plate shown in Fig. 4 coordinates the enclosed scavenging air belt path schematic diagram and gaseous mixture constituted with the scavenging path of Fig. 1 cylinder body
Schematic diagram is flowed in path；
Fig. 6 is the thin plate schematic diagram of a kind of aperture position；
Fig. 7 is that thin plate shown in Fig. 6 coordinates the enclosed scavenging air belt path schematic diagram and gaseous mixture constituted with the scavenging path of Fig. 1 cylinder body
Schematic diagram is flowed in path；
Fig. 8 be gaseous mixture enclosed scavenging air belt on cylinder body enter cylinder body flow to schematic diagram；
Sequence number explanation in accompanying drawing: 1, cylinder body；2a, 2b, enclosed scavenging air belt；3a, 3b, recess channels；4a, 4b, expanding channel；5, cylinder
Body flange face；6,7,8, thin plate；6a, 7b, 8a, 8b, thin plate opening.
Detailed description of the invention
As shown in Fig. 1～Fig. 8, described two stroke engine cylinder body enclosed scavenging path, including the enclosed scavenging air belt of cylinder body 1
Recess channels 3a, 3b(on 2a, 2b, cylinder body flange face 5 include expanding channel 4a, 4b), thin plate 6,7,8(include thin plate opening
6a, 7b, 8a, 8b).
Enclosed scavenging air belt 2a, 2b are positioned at the both sides of cylinder body 1, and recess channels 3a, 3b are positioned 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 at least one thin plate opening 6a, 7b, 8a, 8b, and thin plate 6,7,8 covers at cylinder body flange face 5
On, respectively with recess channels 3a, 3b, expanding channel 4a, 4b, enclosed scavenging air belt 2a, 2b form the cylinder body enclosed of different length and sweep
Gas path.
Specific works process: first embodiment: when thin plate 6 covers on cylinder body flange face 5, and thin plate opening 6a sweeps 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 → entrance enclosed scavenging air belt 2b, with along recess channels 3a → expansion
Zhang Tongdao 4a → recess channels 3a → entrance enclosed scavenging air belt 2b, enters cylinder body, to increase the length of enclosed scavenging path
Degree.
Second embodiment: when thin plate 7 covers on cylinder body flange face 5, and thin plate opening 7b matches with enclosed scavenging air belt 2b
Time, 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 → entrance enclosed scavenging air belt 2a, and along recess channels 3a → expanding channel 4a → recessed
Groove passage 3a → entrance enclosed scavenging air belt 2a, enters cylinder body, to increase the length of enclosed scavenging path.
3rd embodiment: when thin plate 8 covers 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 by 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 by thin plate opening 8b → expanding channel 4b → recess channels 3b → enclosed scavenging air belt 2b.?
Whole gaseous mixture all enters cylinder body, to increase the length of enclosed scavenging path.
Finally, gaseous mixture completes scavenging work in entering cylinder body 1 by enclosed scavenging air belt 2a, enclosed scavenging air belt 2b respectively.
Provide the benefit that: this scavenging path, by the lamellar parts with the use of different openings position, can realize bent axle
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 conducive to pure air and mixes
The layering of gas, improve pure air guide and clear away tail gas stability, reduce the loss of gaseous mixture, reduce exhaust emissions, protect ring
Border.
Although above the enforcement structure of the present invention, method being described in detail, but, the present invention is not limited to this,
In the range of without departing from the technological thought of the present invention and purpose, those skilled in the art can in shape, size, other is detailed
Fine texture aspect, carries out modification to described embodiment, and done modification is still included in the present invention.
Claims (5)
1. a two stroke engine cylinder body enclosed scavenging path, it is characterised in that: include the enclosed scavenging air belt of cylinder body, cylinder body method
Recess channels that blue face is provided with and overlay on the thin plate cooperatively forming inlet channel on cylinder body flange face with recess channels；Described recessed
Groove passage is the variable section structure at least provided with an expanding channel, and described enclosed scavenging air belt, recess channels, expanding channel are connected
Logical.
Two stroke engine cylinder body enclosed scavenging path the most according to claim 1, it is characterised in that: described enclosed scavenging
Road is separately positioned on the both sides of cylinder body, and every side is at least provided with one.
Two stroke engine cylinder body enclosed scavenging path the most according to claim 1 and 2, it is characterised in that: described thin plate
On at least provided with a through hole.
Two stroke engine cylinder body enclosed scavenging path the most according to claim 3, it is characterised in that: described through hole with close
The mating shapes at formula scavenging road junction.
Two stroke engine cylinder body enclosed scavenging path the most according to claim 3, it is characterised in that: described through hole with
The mating shapes of expanding channel mouth.
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 |
|---|---|
| CN105840335A true CN105840335A (en) | 2016-08-10 |
| CN105840335B CN105840335B (en) | 2018-02-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610350596.7A Active CN105840335B (en) | 2016-05-25 | 2016-05-25 | Two stroke engine cylinder body enclosed scavenging path |
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| Country | Link |
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| CN (1) | CN105840335B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285995A (en) * | 2016-10-08 | 2017-01-04 | 山东华盛农业药械有限责任公司 | Two stroke engine enclosed scavenging path |
| 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 |
Citations (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 |
| CN102102595A (en) * | 2009-12-19 | 2011-06-22 | 安德烈亚斯.斯蒂尔两合公司 | Internal combustion engine |
| CN102102583A (en) * | 2009-12-19 | 2011-06-22 | 安德烈亚斯·斯蒂尔两合公司 | Two-stroke engine, sand core for producing a two-stroke engine, and method for operating a two-stroke engine |
| JP2012102740A (en) * | 2008-09-24 | 2012-05-31 | Makita Corp | Stratified scavenging two-stroke 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 |
-
2016
- 2016-05-25 CN CN201610350596.7A patent/CN105840335B/en active Active
Patent Citations (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 |
| JP2012102740A (en) * | 2008-09-24 | 2012-05-31 | Makita Corp | Stratified scavenging two-stroke engine |
| CN102102595A (en) * | 2009-12-19 | 2011-06-22 | 安德烈亚斯.斯蒂尔两合公司 | Internal combustion engine |
| CN102102583A (en) * | 2009-12-19 | 2011-06-22 | 安德烈亚斯·斯蒂尔两合公司 | Two-stroke engine, sand core for producing a two-stroke engine, and method for operating a two-stroke 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 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285995A (en) * | 2016-10-08 | 2017-01-04 | 山东华盛农业药械有限责任公司 | Two stroke engine enclosed scavenging path |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105840335B (en) | 2018-02-16 |
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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 | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
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 |