CN106285995B - Two stroke engine enclosed scavenging access - Google Patents
Two stroke engine enclosed scavenging access Download PDFInfo
- Publication number
- CN106285995B CN106285995B CN201610874957.8A CN201610874957A CN106285995B CN 106285995 B CN106285995 B CN 106285995B CN 201610874957 A CN201610874957 A CN 201610874957A CN 106285995 B CN106285995 B CN 106285995B
- Authority
- CN
- China
- Prior art keywords
- scavenging
- enclosed
- cylinder body
- crankcase
- flange face
- 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.)
- Active
Links
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
-
- 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
-
- 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
-
- 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
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 enclosed scavenging access.The enclosed scavenging access includes mainly that enclosed scavenging air belt, the recess channels on cylinder body flange face, crankcase enclosed scavenging channel, the recess channels on crankcase flange face and the recess channels of cylinder body cooperatively form the thin plate of enclosed inlet channel.Scavenging channel cooperatively forms enclosed scavenging access by the through-hole on thin plate with the scavenging channel on crankcase flange face on cylinder body flange face, the increase of enclosed scavenging air belt length is conducive to the layering of pure air and gaseous mixture, the loss for improving pure air guide cleaning tail gas stability, reducing gaseous mixture, the stability for improving gaseous mixture scavenging, improves scavenging speed, stablizes 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 enclosed scavenging access.
Background technology
Lower exhaust emissions is formulated to Small Universal two stroke engine and has been limited in the countries and regions such as China, European Union, the U.S.
Value, more particularly, to the hand-held tools product such as brush cutter, chain saw, 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.
It takes the lead in sweeping currently, there is use to store portion of air in advance in scavenging air belt in layered scavenging two-stroke engine
Gas, to reduce the phenomenon that gaseous mixture is expelled directly out without burning with exhaust gas, 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 through piston in scavenging air belt, is swept
Air enters cylinder body combustion chamber scavenging when 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 exhaust gas effectively reduces the compound emissions such as HC and CO in tail gas.But by a large amount of experiments have shown that,
When engine is in and runs at high speed, the air capacity that stores is on the low side in scavenging air belt, and not only there is an air in when scavenging, also part without
Therefore the gaseous mixture of burning, which participates in scavenging, can't completely eliminate the discharge of the compounds such as HC and CO, be unfavorable in tail gas
Environmental protection, therefore, a kind of storage gas of urgent need are more, are conducive to air and charge stratification, the enclosed scavenging road of path length.
Invention content
Enclosed scavenging air belt length can be increased the object of the present invention is to provide a kind of, and simple in structure, mold can be realized, cost
The enclosed scavenging access that low, easy processing two stroke engine cylinder body is formed with crankcase combination.
Technical scheme of the present invention：A kind of two stroke engine enclosed scavenging access, including crankcase are mounted on crankcase
Cylinder body on flange face and the thin plate between cylinder body and crankcase, it is characterised in that：What the inner wall of the cylinder body was equipped with
Enclosed scavenging air belt is connected with the recess channels that the flange face of cylinder body is equipped with；The enclosed that the inner wall of the crankcase is equipped with is swept
Air flue is connected with the recess channels that the flange face of crankcase is equipped with；The thin plate equipped with through-hole is matched with recess channels
Two mixed gas passages are formed afterwards, and two mixed gas passages are connected.
Preferably, the enclosed scavenging air belt that the inner wall of the cylinder body is equipped with is located at the both sides of cylinder body, and at least per side
Equipped with one.
Preferably, the enclosed scavenging air belt that the inner wall of the crankcase is equipped with is respectively placed in the both sides of crankcase, and and cylinder
The enclosed scavenging air belt of body both sides is corresponding.
Preferably, the clear size of opening on the thin plate and the recess channels size on cylinder body flange face and crankcase flange face
Match.
Advantageous effect is：The gaseous mixture of crankcase chamber is entered by the enclosed scavenging channel on crankcase on its flange face
Recess channels in, then the recess channels on cylinder body flange face are entered by the through-hole on thin plate, enter back into the enclosed on cylinder body
Scavenging air belt eventually enters into cylinder body combustion chambers burn by scavenging port, to realize the increase of enclosed scavenging air belt length, experiments have shown that
The increase of enclosed scavenging air belt length is conducive to the layering of pure air and gaseous mixture, improvement pure air guide clears away tail gas stability,
The loss for reducing gaseous mixture, improves scavenging speed, stablizes scavenging direction the stability for improving gaseous mixture scavenging, can effectively improve
The power of engine, reduces exhaust emissions at high low-speed stability.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted the part of the present invention, is originally shown
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.
Fig. 1 is that gaseous mixture flows to schematic diagram in the enclosed scavenging channel of side；
Fig. 2 is that gaseous mixture flows to schematic diagram in the enclosed scavenging channel of the other side；
Fig. 3 is crankcase enclosed scavenging air belt and flange face recess channels schematic diagram；
Fig. 4 is cylinder body enclosed scavenging air belt and flange face recess channels schematic diagram；
Fig. 5 is opening thin plate schematic diagram；
Fig. 6 be after opening thin plate and crankcase flange face cooperation mixed airflow to schematic diagram；
Fig. 7 be after opening thin plate and cylinder body flange face cooperation mixed airflow to schematic diagram.
Number explanation in attached drawing：
1, cylinder body；2, thin plate；2a, through-hole one；2b, through-hole two；3, later half crankcase；3a, rearward recess channel one；3b, after
Recess channels two；4, crankshaft room；5, rear enclosed scavenging air belt；6a, enclosed scavenging air belt one；6b, enclosed scavenging air belt two；7a, enclosed are swept
Air flue three；7 b, enclosed scavenging air belt four；8, scavenging port one；9, crankcase gasket；10, first half crankcase；10a, forward recess are logical
Road one；10b, forward recess channel two；11, preceding enclosed scavenging air belt；12, recess channels one；13, recess channels two；14, scavenging port
Two.
Specific implementation mode
As shown in Fig. 1~Fig. 7, the two stroke engine enclosed scavenging access, by first half crankcase 10（Forward recess channel
One 10a, two 10b of forward recess channel, preceding enclosed scavenging air belt 11, crankshaft room 4）, later half crankcase 3（It is one 3a of rearward recess channel, rear recessed
Two 3b of slot channel, crankshaft room 4, rear enclosed scavenging air belt 5）, cylinder body 1（One 6a of enclosed scavenging air belt, two 6b of enclosed scavenging air belt, enclosed are swept
Three 7a of air flue, four 7b of enclosed scavenging air belt, scavenging port 1, recess channels 1, recess channels 2 13, scavenging port 2 14）And thin plate
2（One 2a of through-hole, two 2b of through-hole）Composition.
One 6a of enclosed scavenging air belt, two 6b of enclosed scavenging air belt are located at an inside of cylinder body 1, and three 7a of enclosed scavenging air belt, enclosed are swept
Four 7b of air flue is located at another inside of cylinder body 1, and recess channels 12 and recess channels 13 are located on cylinder body flange face, enclosed scavenging air belt
One 6a is connected with three 7a of enclosed scavenging air belt by recess channels 12, and two 6b of enclosed scavenging air belt and four 7b of enclosed scavenging air belt passes through recessed
Slot channel 13 is connected.
Preceding enclosed scavenging air belt 11 is located at the inner wall of first half crankcase 10 and later half crankcase 3 with rear enclosed scavenging air belt 5
On, one 10a of forward recess channel, two 10b of forward recess channel are located on the flange face of first half crankcase 10, rearward recess channel one
3a, two 3b of rearward recess channel are located on the flange face of later half crankcase 3, one 10a of forward recess channel and rearward recess channel one
3a is connected to, and two 10b of forward recess channel is connected to two 3b of rearward recess channel, and preceding enclosed scavenging air belt 11 passes through with rear enclosed scavenging air belt 5
One 10a of forward recess channel, one 3a of rearward recess channel, two 10b of forward recess channel, two 3b of rearward recess channel are connected.
Thin plate 2 is equipped with one 2a of through-hole, two 2b of through-hole, and thin plate 2 is covered in cylinder body flange face on crankcase flange face, divides
It is one 10a of forward recess channel on crankcase flange face, rear recessed not with the recess channels 12 and recess channels 13 on cylinder body flange face
One 3a of slot channel, two 10b of forward recess channel, two 3b of rearward recess channel form enclosed scavenging access.
Specific work process：The preceding enclosed scavenging air belt 11 of gaseous mixture → entrance in crankshaft room 4 and rear enclosed scavenging air belt 5 →
Respectively enter one 3a of one 10a of forward recess channel, two 10b of forward recess channel and rearward recess channel, two 3b of rearward recess channel → difference
Enclosed scavenging air belt one is respectively enterd into one 2a of through-hole, two 2b of through-hole → respectively enteing recess channels 12 and recess channels 13 →
Two 6b of 6a, three 7a of enclosed scavenging air belt and enclosed scavenging air belt, four 7b of enclosed scavenging air belt → pass through scavenging port 1, scavenging port two respectively
14 → into the combustion chamber of cylinder body 1, to increase the length of enclosed scavenging access.
Advantageous effect：The gaseous mixture of crankcase chamber is entered by the enclosed scavenging channel on crankcase on its flange face
In recess channels, then the recess channels on cylinder body flange face are entered by the through-hole on thin plate, the enclosed entered back on cylinder body is swept
Air flue eventually enters into cylinder body combustion chambers burn by scavenging port, to realize the increase of enclosed scavenging air belt length, experiments have shown that closing
The increase of formula scavenging air belt length is conducive to the layering of pure air and gaseous mixture, improves pure air guide cleaning tail gas stability, drop
The loss of low gaseous mixture, the stability for improving gaseous mixture scavenging improve scavenging speed, stablize scavenging direction, can effectively improve hair
The power of motivation, reduces exhaust emissions at high low-speed stability.
Although structure, the method for the implementation present invention are described in detail above, the present invention is not limited to this,
In the range of not departing from the technological thought and purpose of the present invention, those skilled in the art can be in shape, size, Qi Taxiang
In terms of fine texture, modification is carried out to the embodiment, done modification still includes within the present invention.
Claims (2)
1. a kind of two stroke engine enclosed scavenging access, including crankcase, the cylinder body being mounted on crankcase flange face and position
Thin plate between cylinder body and crankcase, it is characterised in that：Enclosed scavenging air belt that the inner wall of the cylinder body is equipped with and cylinder body
The recess channels that flange face is equipped with are connected；Enclosed scavenging air belt one end that the inner wall of the crankcase is equipped with and crankshaft room's phase
Connection, the other end are connected with the recess channels that the flange face of crankcase is equipped with；
The thin plate equipped with through-hole forms two mixed gas passages after being matched with recess channels, and two mixed gas passages are connected
It is logical；
The enclosed scavenging air belt that the inner wall of the cylinder body is equipped with is located at the both sides of cylinder body, and per side at least provided with one；
The enclosed scavenging air belt that the inner wall of the crankcase is equipped with is respectively placed in the both sides of crankcase, and with the enclosed of cylinder body both sides
Scavenging air belt is corresponding.
2. two stroke engine enclosed scavenging access according to claim 1, it is characterised in that：Through-hole on the thin plate
Size matches with the recess channels size on cylinder body flange face and crankcase flange face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610874957.8A CN106285995B (en) | 2016-10-08 | 2016-10-08 | Two stroke engine enclosed scavenging access |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610874957.8A CN106285995B (en) | 2016-10-08 | 2016-10-08 | Two stroke engine enclosed scavenging access |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106285995A CN106285995A (en) | 2017-01-04 |
| CN106285995B true CN106285995B (en) | 2018-09-25 |
Family
ID=57716838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610874957.8A Active CN106285995B (en) | 2016-10-08 | 2016-10-08 | Two stroke engine enclosed scavenging access |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106285995B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020155897A1 (en) * | 2019-01-29 | 2020-08-06 | 大连理工大学 | Method for preventing accumulation of cylinder oil at scavenging ports of marine low-speed machine |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007177774A (en) * | 2005-12-28 | 2007-07-12 | Komatsu Zenoah Co | Two-cycle engine |
| CN202001099U (en) * | 2011-01-04 | 2011-10-05 | 山东华盛农业药械有限责任公司 | Two-stroke engine for scavenging by adopting air pilot mode |
| CN203783745U (en) * | 2014-04-01 | 2014-08-20 | 山东华盛农业药械有限责任公司 | Layered-scavenging two-stroke gasoline engine cylinder body |
| 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 |
| CN105840335B (en) * | 2016-05-25 | 2018-02-16 | 山东华盛农业药械有限责任公司 | Two stroke engine cylinder body enclosed scavenging path |
| CN206092199U (en) * | 2016-10-08 | 2017-04-12 | 山东华盛农业药械有限责任公司 | Two -stroke -cycle engine closed scavenging route |
-
2016
- 2016-10-08 CN CN201610874957.8A patent/CN106285995B/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020155897A1 (en) * | 2019-01-29 | 2020-08-06 | 大连理工大学 | Method for preventing accumulation of cylinder oil at scavenging ports of marine low-speed machine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106285995A (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8499730B2 (en) | Two cycle engine and two cycle engine tool | |
| EP3006693B1 (en) | Air leading-type stratified scavenging two-stroke internal-combustion engine | |
| CN201568131U (en) | Two-stroke engine | |
| CN105840339B (en) | Layered scavenging two-stroke engine piston | |
| BR0117017A (en) | Clean sump internal combustion engine | |
| CN201560858U (en) | Engine piston | |
| CN204060930U (en) | Four stroke engine | |
| CN102322333A (en) | Two-stroke layered-scavenging engine | |
| CN106285995B (en) | Two stroke engine enclosed scavenging access | |
| CN105840335B (en) | Two stroke engine cylinder body enclosed scavenging path | |
| CN205779284U (en) | A kind of two stroke engine cylinder body enclosed scavenging path | |
| CN102072009A (en) | Two-stroke engine capable of scavenging in air pilot mode | |
| CN206092199U (en) | Two -stroke -cycle engine closed scavenging route | |
| CN205744178U (en) | A kind of layered scavenging two-stroke engine piston | |
| CN104314682A (en) | Two-stroke stratified scavenging gasoline engine | |
| CN202001099U (en) | Two-stroke engine for scavenging by adopting air pilot mode | |
| US8955475B2 (en) | Two-stroke internal combustion engine | |
| CN202300632U (en) | Two-stroke layered scavenging engine | |
| CN201826965U (en) | Two-stroke layering scavenging engine | |
| CN106089473B (en) | Two stroke engine cylinder body extended type enclosed scavenging path | |
| CN202659336U (en) | Two-stroke engine | |
| CN203515843U (en) | Chain saw steam cylinder for two-stroke gasoline engine | |
| CN218717158U (en) | Novel layered scavenging piston | |
| CN202273769U (en) | Scavenging channel of hierarchical scavenging type double-stroke engine | |
| CN205895421U (en) | Two -stroke -cycle engine cylinder body adds elongated closed scavenging route |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Closed scavenging path of two-stroke engine Effective date of registration: 20211230 Granted publication date: 20180925 Pledgee: China Construction Bank Corporation Linyi Luozhuang sub branch Pledgor: SHANDONG HUASHENG PESTICIDE MACHINERY Co.,Ltd. Registration number: Y2021980017162 |
|
| 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: 20180925 Pledgee: China Construction Bank Corporation Linyi Luozhuang sub branch Pledgor: SHANDONG HUASHENG PESTICIDE MACHINERY Co.,Ltd. Registration number: Y2021980017162 |