CN205638681U - Two -stroke -cycle engine's scavenge system - Google Patents
Two -stroke -cycle engine's scavenge system Download PDFInfo
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- CN205638681U CN205638681U CN201620482555.9U CN201620482555U CN205638681U CN 205638681 U CN205638681 U CN 205638681U CN 201620482555 U CN201620482555 U CN 201620482555U CN 205638681 U CN205638681 U CN 205638681U
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- scavenging
- air belt
- mixture
- room
- gas outlet
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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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- Lubrication Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a two -stroke -cycle engine's scavenge system, including the cylinder that has burning work done room, the crankcase that has the bent axle room, a piston, the bent axle subassembly, be equipped with the incoming mixture air inlet on the cylinder, the gas vent, indoor being equipped with of bent axle has first air inlet, the rich mixture scavenging air belt of first gas outlet and have the second air inlet, rare gas mixture scavenging air belt of second gas outlet, the rich mixture scavenging air belt, rare gas mixture scavenging air belt is the camber and pastes tightly with the inner wall of bent axle room both sides, the indoor first scavenging port of keeping away from the gas vent and being linked together with first gas outlet that is equipped with of burning work done, the second scavenging port that is close to the gas vent and is linked together with the second gas outlet, the rich mixture scavenging air belt, be equipped with the first oily muscle that hinders on rare gas mixture scavenging air belt respectively, the second hinders oily muscle. This two -stroke -cycle engine's scavenge system can form layering scavenging state, reduces harmful components content in the tail gas, more environmental protection and the oil consumption when more sparingly using.
Description
Technical field
This utility model relates to two stroke engine, particularly relates to the scavenging system of a kind of two stroke engine.
Background technology
Two stroke engine is generally used in the portable power facility such as brush cutter and gasoline chain saw, it mainly includes piston that cylinder coordinates, crankcase and by bearings crankshaft group on crankcase with cylinder, thus top land and cylinder inner cavity form a burning work done room, and internal piston forms a crankshaft room with crankcase intracavity.Typically can arrange air inlet, air vent and scavenging port on cylinder, these QI KOU all are controlled to open or close by piston.One cycle of operation of electromotor is to be enclosed two strokes up and down of namely piston by crank rotation one to complete.
In the up stroke of piston, air-fuel mixture is from the crankshaft room that air inlet is drawn into below piston.When descent of piston, air-fuel mixture in crankshaft room is compressed in advance, thus forms the gaseous mixture after compression, and this gaseous mixture is flowed in scavenging air belt, the most again the burning work done room above scavenging port is blown into piston, by loop scavenging, the waste gas after burning is blowed to air vent.Owing to directly the waste gas after burning being driven extruding by the air-fuel mixture after compression, this results in and is prone to mix with the waste gas after burning for the fresh air-fuel mixture carrying out scavenging, which increases the escape amount of incoming mixture, so containing substantial amounts of harmful components such as HC, CO etc. in general two-stroke internal combustion tail gas, being generally not capable of meeting the regulation of the strictest exhaust emissions.
Summary of the invention
This utility model is prone to mix with the waste gas after burning be discharged away for fresh air-fuel mixture in scavenging process present in prior art, cause in two-stroke internal combustion tail gas containing defects such as substantial amounts of harmful components, it is provided that the scavenging system of a kind of new two stroke engine.
In order to solve above-mentioned technical problem, this utility model is achieved through the following technical solutions:
nullA kind of scavenging system of two stroke engine，Including the cylinder with burning work done room、There is the crankcase of crankshaft room、Piston、Crankshaft group，Described cylinder is connected with crankcase，Incoming mixture air inlet it is respectively arranged with on described cylinder、Air vent，Described piston is positioned at the bottom of burning work done room，Described crankshaft group is positioned at crankshaft room and is connected with piston，Rich mixture scavenging air belt it is additionally provided with in described crankshaft room、Lean mixture scavenging air belt，Described rich mixture scavenging air belt has the first air inlet、First gas outlet，Described lean mixture scavenging air belt has the second air inlet、Second gas outlet，Described rich mixture scavenging air belt、Lean mixture scavenging air belt be camber and respectively inwall with crankshaft room both sides be adjacent to mutually，The first described air inlet、Second air inlet lays respectively at the downside inwall of crankshaft room and the first air inlet、Separation muscle it is provided with between second air inlet，Described burning work done indoor are respectively arranged with the first scavenging port、Second scavenging port，The first described scavenging port is connected away from air vent and with the first gas outlet of rich mixture scavenging air belt，The second described scavenging port is connected near air vent and with the second gas outlet of lean mixture scavenging air belt，Described rich mixture scavenging air belt、The first oil resistance muscle it is respectively arranged with on lean mixture scavenging air belt、Second oil resistance muscle.
nullAfter incoming mixture is inhaled in crankshaft room by incoming mixture air inlet，Rotation along with crankshaft group is rotated，When descent of piston，Incoming mixture in crankshaft room will be compressed and force incoming mixture toward the flows of crankshaft room，So that the rotation direction along crankshaft group is entered by major part incoming mixture forms rich mixture in rich mixture scavenging air belt，Small part incoming mixture then enters in lean mixture scavenging air belt and forms lean mixture，The most descending along with piston，Rich mixture will continue to oppress to be passed through in burning work done room and at the first scavenging port and go out，Lean mixture the most oppressed be passed through burning work done room in go out at the second scavenging port，Now it is opened because of the air vent of the flow-down burning work done room of piston，And due to the first scavenging port away from air vent the second scavenging port near air vent，First waste gas after then burning in burning work done room will be pushed to air vent by the lean mixture gone out at the second scavenging port，And the rich mixture gone out at the first scavenging port will promote lean mixture and be inconjunction with promotion waste gas from exhaust ports discharge，Form layered scavenging state，Then finally indoor in burning work done，It is mainly lean mixture near the region of air vent，And the region away from air vent is mainly rich mixture，Thus greatly reduce the Harmful ingredient content such as HC and CO in the waste gas of two stroke engine discharge，More environmentally-friendly and more save use time oil consumption.Wherein generally all with lubricating oil in rich mixture and lean mixture, rich mixture scavenging air belt, the the first oil resistance muscle being respectively provided with on lean mixture scavenging air belt, second oil resistance muscle can be to rich mixture, lubrication oil droplet in lean mixture is formed with the stop of effect, make lubricating oil drop in be blocked after along rich mixture scavenging air belt, lean mixture scavenging air belt converges to the downside of crankshaft room, it is thus possible to piston, crankshaft groups etc. are lubricated, efficiently avoid the deterioration of engine lubrication performance, further reduce simultaneously and enter into the oil level that burning work done is indoor, purify the tail gas of electromotor further, decrease piston and the carbon distribution of burning work done room, improve the starting performance of electromotor.
As preferably, the scavenging system of a kind of two stroke engine described above, it is additionally provided with throttle orifice at the first gas outlet of described rich mixture scavenging air belt.Make rich mixture scavenging air belt creates between the upstream and downstream of throttle orifice bigger pressure reduction, rich mixture can be sprayed from throttle orifice jet with the highest flow velocity, rich mixture can expand after by throttle orifice sharp, thus form turbulence state and be ejected at the first scavenging port in burning work done room, thus increase stream pressure when rich mixture is gone out at the first scavenging port and flow velocity, play more preferable scavenging effect, improve scavenging efficiency.Additionally, throttle orifice can also promote the atomization of rich mixture, improve efficiency during burning, the content of the Harmful ingredient content being effectively reduced in tail gas, especially THC, also improve fuel economy simultaneously.
As preferably, the scavenging system of a kind of two stroke engine described above, the width of described throttle orifice is less than the width of the first gas outlet.More preferable scavenging effect can be played, and nebulization efficiency is higher.
As preferably, the scavenging system of a kind of two stroke engine described above, described the first oil resistance muscle, the second oil resistance muscle all distribute as net shape.Liquid oil droplet in rich mixture, lean mixture can be played multi-level barrier effect, blocking effect is more preferable.
This utility model has the advantages that
1, incoming mixture can be divided into rich mixture and lean mixture by rich mixture scavenging air belt, lean mixture scavenging air belt by this utility model, and pour in burning work done room by the first scavenging port, the second scavenging port respectively, thus form layered scavenging state in burning work done room, greatly reduce the Harmful ingredient content such as HC and CO in the tail gas of two stroke engine discharge, more environmentally-friendly and more save oil consumption when using.
2, this utility model is by the first oil resistance muscle arranged on rich mixture scavenging air belt, lean mixture scavenging air belt, the second oil resistance muscle, lubrication oil droplet in rich mixture, lean mixture can be blocked thus converge to the downside of crankshaft room, it is thus possible to piston, crankshaft group etc. are lubricated, efficiently avoid the deterioration of engine lubrication performance, further reduce simultaneously and enter into the oil level that burning work done is indoor, purify the tail gas of electromotor further, decrease piston and the carbon distribution of burning work done room, improve the starting performance of electromotor.
3, this utility model passes through throttle orifice, stream pressure when rich mixture is gone out at the first scavenging port and flow velocity can be increased, play more preferable scavenging effect, improve scavenging efficiency, and the atomization of rich mixture can be promoted, improve efficiency during burning, the Harmful ingredient content being effectively reduced in tail gas, the especially content of THC, also improves fuel economy simultaneously.
Accompanying drawing explanation
Fig. 1 is the cross-sectional view of the scavenging system of a kind of two stroke engine of this utility model；
Fig. 2 is rich mixture scavenging air belt in this utility model, lean mixture scavenging air belt and the first scavenging port, the cross-sectional view of the second scavenging port.
Detailed description of the invention
This utility model is described in further detail by 1-2 and detailed description of the invention below in conjunction with the accompanying drawings, but they are not to restriction of the present utility model:
Embodiment
1
nullSuch as Fig. 1、Shown in Fig. 2，A kind of scavenging system of two stroke engine，Including the cylinder 1 with burning work done room 2、There is the crankcase 8 of crankshaft room 10、Piston 12、Crankshaft group 5，Described cylinder 1 is connected with crankcase 8，It is respectively arranged with incoming mixture air inlet 11 on described cylinder 1、Air vent 4，Described piston 12 is positioned at the bottom of burning work done room 2，Described crankshaft group 5 is positioned at crankshaft room 10 and is connected with piston 12，It is additionally provided with rich mixture scavenging air belt 9 in described crankshaft room 10、Lean mixture scavenging air belt 6，Described rich mixture scavenging air belt 9 has the first air inlet 91、First gas outlet 92，Described lean mixture scavenging air belt 6 has the second air inlet 61、Second gas outlet 62，Described rich mixture scavenging air belt 9、Lean mixture scavenging air belt 6 in camber and respectively inwall with crankshaft room 10 both sides is adjacent to mutually，The first described air inlet 91、Second air inlet 61 lays respectively at the downside inwall of crankshaft room 10 and the first air inlet 91、Separation muscle 7 it is provided with between second air inlet 61，It is respectively arranged with the first scavenging port 13 in described burning work done room 2、Second scavenging port 3，The first described scavenging port 13 is connected away from air vent 4 and with the first gas outlet 92 of rich mixture scavenging air belt 9，The second described scavenging port 3 is connected near air vent 4 and with the second gas outlet 62 of lean mixture scavenging air belt 6，Described rich mixture scavenging air belt 9、The first oil resistance muscle 93 it is respectively arranged with on lean mixture scavenging air belt 6、Second oil resistance muscle 63.
nullWhen piston 12 is during up，Along with the pressure in crankshaft room 10 reduces，To be inhaled into crankshaft room 10 by incoming mixture air inlet 11 from the incoming mixture of the air-fuel mixing arrangement outputs such as carburetor and rotate along with the rotation of crankshaft group 5，When being pushed down under the piston 12 combusted gas generant pressure effect in work done room 2 of burning，Incoming mixture in crankshaft room 10 will be compressed and force incoming mixture toward the flows of crankshaft room 10，Rotation direction along crankshaft group 5 is entered in rich mixture scavenging air belt 9 by the first air inlet 91 of rich mixture scavenging air belt 9 and forms the denseest rich mixture by the most a part of incoming mixture，And another part incoming mixture enters in lean mixture scavenging air belt 6 at the second air inlet 61 along lean mixture scavenging air belt 6 and forms the thinnest lean mixture，And the most descending along with crankshaft group 5，Rich mixture in rich mixture scavenging air belt 9 is gone out continuing to oppress to be passed through at the first gas outlet 92 of rich mixture scavenging air belt 9 in burning work done room 2 and at the first scavenging port 13，Lean mixture in lean mixture scavenging air belt 6 the most oppressed be passed through in burning work done room 2 and at the second scavenging port 3 at the second gas outlet 62 from lean mixture scavenging air belt 6 and go out，Now it is opened because of the air vent 4 of the flow-down burning work done room 2 of piston 12，And due to the first scavenging port 13 away from air vent 4 second scavenging port 3 near air vent 4，Waste gas after then burning in burning work done room 2 becomes tail gas by first being pushed to air vent 4 by the lean mixture gone out at the second scavenging port 3，And the rich mixture gone out at the first scavenging port 13 will promote lean mixture and be inconjunction with promotion waste gas discharge at air vent 4，Form layered scavenging state，Then finally in burning work done room 2，It is mainly lean mixture near the region of air vent 4，And the region away from air vent 4 is mainly rich mixture，Thus greatly reduce the Harmful ingredient content such as HC and CO in the tail gas of two stroke engine discharge，More environmentally-friendly and more save use time oil consumption.Wherein generally all with lubricating oil in rich mixture and lean mixture, rich mixture scavenging air belt 9, the first oil resistance muscle 93 it is respectively arranged with on lean mixture scavenging air belt 6, second oil resistance muscle 63 can be to rich mixture, lubrication oil droplet in lean mixture is formed with the stop of effect, make lubricating oil along rich mixture scavenging air belt 9 after being blocked, lean mixture scavenging air belt 6 converges to the downside of crankshaft room, it is thus possible to piston, crankshaft group 5 etc. is lubricated, efficiently avoid the deterioration of engine lubrication performance, further reduce the oil level entered in burning work done room 2 simultaneously, purify the tail gas of electromotor further, decrease piston and the carbon distribution of burning work done room 2, improve the starting performance of electromotor.
As preferably, at the first gas outlet 92 of described rich mixture scavenging air belt 9, it is additionally provided with throttle orifice 94.
As preferably, the width of described throttle orifice 94 is less than the width of the first gas outlet 92.
As preferably, first described oil resistance muscle the 93, second oil resistance muscle 63 all distributes as net shape.
In a word, the foregoing is only preferred embodiment of the present utility model, equalization change and the modification that all scopes applied for a patent according to this utility model are made, all should belong to covering scope of the present utility model.
Claims (4)
1.
nullA kind of scavenging system of two stroke engine，Including the cylinder (1) with burning work done room (2)、There is the crankcase (8) of crankshaft room (10)、Piston (12)、Crankshaft group (5)，Described cylinder (1) is connected with crankcase (8)，It is respectively arranged with incoming mixture air inlet (11) on described cylinder (1)、Air vent (4)，Described piston (12) is positioned at the bottom of burning work done room (2)，Described crankshaft group (5) is positioned at crankshaft room (10) and is connected with piston (12)，It is characterized in that: in described crankshaft room (10), be additionally provided with rich mixture scavenging air belt (9)、Lean mixture scavenging air belt (6)，Described rich mixture scavenging air belt (9) has the first air inlet (91)、First gas outlet (92)，Described lean mixture scavenging air belt (6) has the second air inlet (61)、Second gas outlet (62)，Described rich mixture scavenging air belt (9)、Lean mixture scavenging air belt (6) in camber and respectively inwall with crankshaft room (10) both sides is adjacent to mutually，Described the first air inlet (91)、Second air inlet (61) lays respectively at the downside inwall of crankshaft room (10) and the first air inlet (91)、Separation muscle (7) it is provided with between second air inlet (61)，It is respectively arranged with the first scavenging port (13) in described burning work done room (2)、Second scavenging port (3)，Described the first scavenging port (13) is connected away from air vent (4) and with first gas outlet (92) of rich mixture scavenging air belt (9)，Described the second scavenging port (3) near air vent (4) and is connected with second gas outlet (62) of lean mixture scavenging air belt (6)，Described rich mixture scavenging air belt (9)、The first oil resistance muscle (93) it is respectively arranged with on lean mixture scavenging air belt (6)、Second oil resistance muscle (63).
2.
The scavenging system of a kind of two stroke engine according to claim 1, it is characterised in that: the first gas outlet (92) place of described rich mixture scavenging air belt (9) is additionally provided with throttle orifice (94).
3.
The scavenging system of a kind of two stroke engine according to claim 2, it is characterised in that: the width of described throttle orifice (94) is less than the width of the first gas outlet (92).
4.
The scavenging system of a kind of two stroke engine according to claim 1, it is characterised in that: described the first oil resistance muscle (93), the second oil resistance muscle (63) all distribute as net shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620482555.9U CN205638681U (en) | 2016-05-25 | 2016-05-25 | Two -stroke -cycle engine's scavenge system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620482555.9U CN205638681U (en) | 2016-05-25 | 2016-05-25 | Two -stroke -cycle engine's scavenge system |
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| Publication Number | Publication Date |
|---|---|
| CN205638681U true CN205638681U (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620482555.9U Expired - Fee Related CN205638681U (en) | 2016-05-25 | 2016-05-25 | Two -stroke -cycle engine's scavenge system |
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| CN (1) | CN205638681U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863818A (en) * | 2016-05-25 | 2016-08-17 | 浙江三锋实业股份有限公司 | Scavenging system of two-stroke engine |
-
2016
- 2016-05-25 CN CN201620482555.9U patent/CN205638681U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105863818A (en) * | 2016-05-25 | 2016-08-17 | 浙江三锋实业股份有限公司 | Scavenging system of two-stroke engine |
| CN105863818B (en) * | 2016-05-25 | 2018-08-28 | 浙江三锋实业股份有限公司 | A kind of scavenging system of two stroke engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161012 Termination date: 20190525 |