CN106089473B - Two stroke engine cylinder body extended type enclosed scavenging path - Google Patents
Two stroke engine cylinder body extended type enclosed scavenging path Download PDFInfo
- Publication number
- CN106089473B CN106089473B CN201610675585.6A CN201610675585A CN106089473B CN 106089473 B CN106089473 B CN 106089473B CN 201610675585 A CN201610675585 A CN 201610675585A CN 106089473 B CN106089473 B CN 106089473B
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- China
- Prior art keywords
- cylinder body
- gaseous mixture
- scavenging
- enclosed
- air belt
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- 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)
- Supercharger (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 two stroke engine cylinder body extended type enclosed scavenging path.Connected below cylinder body exhaust outlet provided with gaseous mixture air storing cavity with crankcase, cylinder body scavenging air belt is divided into two independent scavenging air belts by the partition wall on side cover, two scavenging air belts pass to the connection of gaseous mixture air storing cavity and crankcase respectively, and recess channels connection gaseous mixture air storing cavity and another enclosed scavenging air belt are designed with cylinder body flange face.Cylinder body flange face and the thin plate cooperation for being designed with through hole, so that gaseous mixture enters cylinder body by gaseous mixture air storing cavity, passage, enclosed scavenging air belt respectively, with chill vent side, and increase the length of enclosed scavenging air belt.The increase of enclosed scavenging air belt length is advantageous to the layering of pure air and gaseous mixture, improves pure air guide cleaning tail gas stability, 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 extended type enclosed scavenging path.
Background technology
Have in layered scavenging two-stroke engine using storage portion of air takes the lead in scavenging in advance in scavenging air belt, to subtract
The phenomenon that few gaseous mixture is expelled directly out without burning with waste gas, so as to effectively reduce the harmful components such as HC and CO chemical combination in tail gas
Thing.Experiment proves under same displacement, same traffic, same speed conditions that layered-scavenging engine power is significantly larger than tradition two
Stroke Engine, according to the conservation of energy, mixture combustion is more complete in the case, and release heat is more, engine heat load
It is bigger, especially exhaust side；
Having verified that the length increase of enclosed scavenging air belt contributes to the layering of gaseous mixture and pure air, improves pure air guide
Clear away tail gas stability, the stability for reducing the loss of gaseous mixture, improving gaseous mixture scavenging, improve scavenging speed, stable scavenging
Direction, power, high low-speed stability, the reduction exhaust emissions of engine can be effectively improved.
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, also there is the two stroke engine cylinder body enclosed scavenging path of cooling cylinder body exhaust side effect.
Technical scheme：A kind of two stroke engine cylinder body extended type enclosed scavenging path, including cylinder body, side cover
And sheet member, it is characterised in that：The gaseous mixture air storing cavity connected with crankcase is provided with below cylinder body exhaust outlet；Cylinder body is matched somebody with somebody with side cover
The enclosed scavenging air belt formed after conjunction is divided into independent two by the partition wall on side cover, wherein an enclosed scavenging air belt and gaseous mixture
Air storing cavity is connected by passage, and another enclosed scavenging air belt is opened on cylinder body flange face and leads directly to crankcase, is gone back on cylinder body flange face
It is communicated with the recess channels of gaseous mixture air storing cavity and enclosed scavenging air belt；Cylinder body flange face coordinates with the sheet member provided with opening,
So that gaseous mixture enters cylinder body by gaseous mixture air storing cavity, recess channels, enclosed scavenging air belt respectively.
Preferably, the enclosed scavenging air belt is separately positioned on the left and right sides of cylinder body.
Preferably, the enclosed scavenging air belt is connected by least one passage with gaseous mixture air storing cavity.
Preferably, the gaseous mixture air storing cavity that is connected with crankcase is at least one.
Preferably, the opening of the sheet member is opened with the enclosed scavenging air belt opening on cylinder body flange face, gaseous mixture air storing cavity
Mouth size matches.
Beneficial effect is：The scavenging path is by the way that with the use of opening sheet member, the gaseous mixture that crankcase can be achieved passes through
The gaseous mixture air storing cavity of exhaust side enters a wherein enclosed scavenging air belt, eventually enters into cylinder body combustion chambers burn, is closed with realizing
The increase of formula scavenging air belt length, and the gaseous mixture cooling exhaust side of the lower temperature by constantly flowing.Experiment proves enclosed
The increase of scavenging air belt length is advantageous to the layering of pure air and gaseous mixture, improves pure air guide cleaning tail gas stability, reduces
The loss of gaseous mixture, the stability for improving gaseous mixture scavenging, scavenging speed, stable scavenging direction are improved, can effectively improve and start
The power of machine, high low-speed stability, reduce exhaust emissions.
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 scavenging path on cylinder body flange face and mixed airflow to schematic diagram；
Fig. 2 is a kind of thin plate schematic diagram of aperture position；
Fig. 3 be after opening sheet member and cylinder body flange face coordinate mixed airflow to schematic diagram；
Fig. 4 is cylinder body side scavenging air belt to be coordinated and mixed airflow is to schematic diagram with side cover；
Fig. 5 is A-A sectional views and mixed airflow to schematic diagram；
Fig. 6 is B-B direction sectional view and mixed airflow to schematic diagram；
Fig. 7 is C-C to sectional view and mixed airflow to schematic diagram；
Fig. 8 is cylinder body opposite side scavenging air belt to be coordinated and mixed airflow is to schematic diagram with side cover.
Number explanation in accompanying drawing：1st, cylinder body；2nd, the right scavenging port of cylinder body；3rd, right enclosed scavenging air belt one；3-1, right scavenging air belt one；
3-2, right cap scavenging air belt one；4th, right enclosed scavenging air belt two；4-1, right scavenging air belt two；4-2, right cap scavenging air belt two；5th, passage
One；6th, gaseous mixture air storing cavity one；7th, gaseous mixture air storing cavity two；8th, passage two；9th, exhaust outlet；10th, right cap；11st, left cap；
12nd, left enclosed scavenging air belt two；12-1, left scavenging air belt two；12-2, left cap scavenging air belt two；13rd, cylinder body flange face；14th, groove
Passage one；15th, recess channels two；16th, sheet member；17th, opening three；18th, opening two；19th, opening one；20th, left enclosed scavenging air belt
One；20-1, left scavenging air belt one；20-2, left cap scavenging air belt one；21st, left cap partition wall；22nd, the left scavenging port of cylinder body；23rd, right side
Lid partition wall；24th, partition wall.A, b, c, d, mixed airflow are to path.
Embodiment
As shown in Fig. 1~Fig. 8, two stroke engine cylinder body extended type enclosed scavenging path, mainly combined and thin by cylinder body
Plate 16 is formed, i.e. cylinder body combination includes cylinder body 1（The right scavenging port 2 of cylinder body, the 3-1 of right scavenging air belt one, the 4-1 of right scavenging air belt two, passage
One 5, gaseous mixture air storing cavity 1, gaseous mixture air storing cavity 27, passage 28, exhaust outlet 9, the 20-1 of left scavenging air belt one, left scavenging air belt two
The left scavenging port 22 of 12-1, cylinder body flange face 13, recess channels 1, recess channels 2 15, cylinder body, partition wall 24）, right cap 10
（Right cap partition wall 23, the 3-2 of right cap scavenging air belt one, the 4-2 of right cap scavenging air belt two）, left cap 11（Left cap partition wall 21, left side
The 20-2 of lid scavenging air belt one, the 12-2 of left cap scavenging air belt two）With sheet member 16（Be open 3 17, opening 2 18, opening 1）.
As shown in Fig. 4, Fig. 5, Fig. 7, Fig. 8, cylinder body combination is mainly made up of cylinder body 1, right cap 10, left cap 11.Wherein,
The 3-2 of right cap scavenging air belt one, the 4-2 of right cap scavenging air belt two that right cap 10 is divided into by right cap partition wall 23, respectively with cylinder body 1
On the 3-1 of right scavenging air belt one, the 4-1 of right scavenging air belt two separately constitute right enclosed scavenging air belt 1, right enclosed scavenging air belt 24.
As shown in figure 8, left cap 11 be divided into by left cap partition wall 21 the 20-2 of left cap scavenging air belt one, left cap scavenging
The 12-2 of road two, separately constitute left enclosed scavenging air belt one with the 20-1 of left scavenging air belt one on cylinder body 1, the 12-1 of left scavenging air belt two respectively
20th, left enclosed scavenging air belt 2 12.
Wherein, left enclosed scavenging air belt 1, right enclosed scavenging air belt 1 are opened on cylinder body flange face 13, directly and crankcase
Connection, as shown in Figure 1, Figure 3.
As shown in fig. 6, have gaseous mixture air storing cavity 1, gaseous mixture air storing cavity 27 along envisaged underneath under the exhaust outlet 9 of cylinder body 1,
This two air storing cavity can be split by partition wall 24, can also connect to form an air storing cavity.Wherein gaseous mixture air storing cavity 1 passes through passage
One 5 are connected with right enclosed scavenging air belt 24, and gaseous mixture air storing cavity 27 is connected by passage 28 with left enclosed scavenging air belt 2 12.
As shown in Figure 1, Figure 2, Figure 3 shows, left enclosed scavenging air belt 1, right enclosed scavenging air belt 1 enter on cylinder body flange face 13
Mouth is communicated to gaseous mixture air storing cavity 27 by recess channels 2 15, recess channels 1 respectively, gaseous mixture air storing cavity 1 enters
Mouthful, when cylinder body flange face 13 is used cooperatively sheet member 16, the opening 3 17 in sheet member 16 enters with left enclosed scavenging air belt 1
Mouth cooperation, opening 1 coordinate with the right entrance of enclosed scavenging air belt 1, and be open 2 18 and gaseous mixture air storing cavity 27, gaseous mixture gas storage
The entrance of chamber 1 coordinates, and gaseous mixture can realize two-way flow by recess channels 2 15, recess channels 1, to improve gaseous mixture
Scavenging stability.
Specific work process：
A mixed airflows are as follows to path：Opening 1 → right enclosed in crankcase in gaseous mixture → sheet member 16
In the right 2 → cylinder body of scavenging port 1 of one 3 → cylinder body of scavenging air belt.
B mixed airflows are as follows to path：2 18 → gaseous mixture of opening in crankcase in gaseous mixture → sheet member 16
In the right 2 → cylinder body of scavenging port 1 of one 6 → passage of air storing cavity 1 → right enclosed 24 → cylinder body of scavenging air belt.
C mixed airflows are as follows to path：2 18 → gaseous mixture of opening in crankcase in gaseous mixture → sheet member 16
In the right 2 → cylinder body of scavenging port 1 of 27 → passage of air storing cavity 28 → left enclosed 2 12 → cylinder body of scavenging air belt.
D mixed airflows are as follows to path：Opening 3 17 → left enclosed in crankcase in gaseous mixture → sheet member 16
In the left 22 → cylinder body of scavenging port 1 of one 20 → cylinder body of scavenging air belt.
B, c mixed airflows can be effectively increased the length of passed through enclosed scavenging air belt to path, in gaseous mixture air storing cavity constantly
The gaseous mixture of the lower temperature of flowing can cool down cylinder body exhaust side.
Beneficial effect is：The scavenging path is by the way that with the use of opening sheet member, the gaseous mixture that crankcase can be achieved passes through
The gaseous mixture air storing cavity of exhaust side enters a wherein enclosed scavenging air belt, eventually enters into cylinder body combustion chambers burn, is closed with realizing
The increase of formula scavenging air belt length, and the gaseous mixture cooling cylinder body exhaust of the lower temperature by constantly being flowed in gaseous mixture air storing cavity
Mouth side, reduces engine heat load, improves engine reliability.Experiment proves that the increase of enclosed scavenging air belt length is advantageous to pure sky
The layering of gas and gaseous mixture, improve pure air guide cleaning tail gas stability, reduce the loss of gaseous mixture, improve gaseous mixture scavenging
Stability, improve scavenging speed, stable scavenging direction, the power of engine, high low-speed stability can be effectively improved, reduce tail
Gas discharges.
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 (5)
1. a kind of two stroke engine cylinder body extended type enclosed scavenging path, including cylinder body, side cover and sheet member, its feature exist
In：The gaseous mixture air storing cavity connected with crankcase is provided with below cylinder body exhaust outlet；The enclosed that cylinder body is formed after coordinating with side cover is swept
Air flue is divided into independent two by the partition wall on side cover, wherein an enclosed scavenging air belt is connected with gaseous mixture air storing cavity by passage
Logical, another enclosed scavenging air belt is opened on cylinder body flange face and leads directly to crankcase, and connection gaseous mixture storage is additionally provided with cylinder body flange face
The recess channels of air cavity and enclosed scavenging air belt；Cylinder body flange face coordinates with the sheet member provided with opening, so that gaseous mixture leads to respectively
Cross gaseous mixture air storing cavity, recess channels, enclosed scavenging air belt and enter cylinder body.
2. two stroke engine cylinder body extended type enclosed scavenging path according to claim 1, it is characterised in that：It is described to close
Formula scavenging air belt is separately positioned on the left and right sides of cylinder body.
3. two stroke engine cylinder body extended type enclosed scavenging path according to claim 1, it is characterised in that：It is described to close
Formula scavenging air belt is connected by least one passage with gaseous mixture air storing cavity.
4. two stroke engine cylinder body extended type enclosed scavenging path according to claim 1, it is characterised in that：With bent axle
The gaseous mixture air storing cavity of case connection is at least one.
5. two stroke engine cylinder body extended type enclosed scavenging path according to claim 1, it is characterised in that：It is described thin
The opening of plate matches with the enclosed scavenging air belt opening on cylinder body flange face, gaseous mixture air storing cavity opening size.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610675585.6A CN106089473B (en) | 2016-08-17 | 2016-08-17 | Two stroke engine cylinder body extended type enclosed scavenging path |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610675585.6A CN106089473B (en) | 2016-08-17 | 2016-08-17 | Two stroke engine cylinder body extended type enclosed scavenging path |
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| Publication Number | Publication Date |
|---|---|
| CN106089473A CN106089473A (en) | 2016-11-09 |
| CN106089473B true CN106089473B (en) | 2018-04-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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Denomination of invention: Extended closed scavenging passage for cylinder block of two-stroke engine Effective date of registration: 20211230 Granted publication date: 20180410 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: 20180410 Pledgee: China Construction Bank Corporation Linyi Luozhuang sub branch Pledgor: SHANDONG HUASHENG PESTICIDE MACHINERY Co.,Ltd. Registration number: Y2021980017162 |