CN105840339A - Stratified scavenging two-stroke engine piston - Google Patents
Stratified scavenging two-stroke engine piston Download PDFInfo
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- CN105840339A CN105840339A CN201610350520.4A CN201610350520A CN105840339A CN 105840339 A CN105840339 A CN 105840339A CN 201610350520 A CN201610350520 A CN 201610350520A CN 105840339 A CN105840339 A CN 105840339A
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- Prior art keywords
- scavenging
- piston
- pure air
- air inlet
- stroke engine
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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
- F02F3/00—Pistons
- F02F3/24—Pistons having means for guiding gases in cylinders, e.g. for guiding scavenging charge in two-stroke engines
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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 invention relates to the technical field of universal small two-stroke engines, in particular to a stratified scavenging two-stroke engine piston. Semi-closed internal channels are formed in the two sides of a gas inlet side of a piston skirt and comprise pure air inlet channels, internal channel bodies, ventilation channels and pin holes; when the piston moves upwards in a cylinder body, the semi-closed internal channels communicate with pure air inlets of the cylinder body, the pure air entering closed scavenging channels of the cylinder body through the semi-closed internal channels and mixed gas entering the closed scavenging channels from a crankcase are stored in a stratified mode, after the mixed gas is combusted and worked, the piston moves downwards, the pressure of the crankcase is increased for sequentially pressing gas inside the closed scavenging channels into the cylinder body, the pure air carries out scavenging on tail gas in advance, the tail gas is exhausted from an exhaust port, then the pure air and the mixed gas as well as the mixed gas sequentially carry out scavenging, the application of the mixed gas is effectively reduced because the pure air carries out scavenging in advance, emission of the tail gas is effectively reduced, and the environment is protected.
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
The piston of machine.
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 the layered scavenging two-stroke gasoline engine that air capacity is more, scavenging efficiency is high of a kind of leading scavenging,
Can effectively reduce the content of the compound such as HC and CO in tail gas, protect environment well.
Summary of the invention
It is an object of the invention to provide the piston of a kind of new construction that can realize guide's pure air stratification scavenging techniques, piston
In cylinder body upwards in motor process, substantial amounts of pure air can by pure air inlet passage, internal channel that piston is provided with, change
Gas passage enters in the enclosed scavenging air belt in cylinder body, is layered with mixed Daqu, utilizes scavenging during scavenging in enclosed scavenging air belt
The pure air of guide in road takes the lead in clearing away tail gas, owing to the content of air pure in enclosed scavenging air belt is a lot, greatly reduces mixing
The consumption of gas, thus advantageously reduce the discharge of the compound such as HC and CO in tail gas, protect environment.
For solving technical problem, the invention provides the piston of a kind of layered scavenging two-stroke engine, a kind of layering is swept
Gas two stroke engine piston, including pin-and-hole, piston skirt, it is characterised in that: air inlet side both sides, described piston skirt are respectively
Being provided with half-closed internal channel, described half-closed internal channel includes pure air inlet passage, sets in the bottom of pure air inlet passage
There is internal channel, between the chamfering outside described internal channel and described pin-and-hole, be provided with open channel one, set in described pin-and-hole bottom
There is the ventilation passage communicated with internal channel, between described ventilation passage and chamfering, be provided with open channel two.
Preferably, described ventilation passage is more than the air inlet area of internal channel.
Further, described internal channel is circular hole, and described Circularhole diameter scope is 0.11～0.18 times of piston diameter, preferably
0.13～0.16 times of piston diameter.
Further, described ventilation passage is strip.
Further, described ventilation passage is circular.
Preferably, described chamfer dimesion preferably 2 mm × 45 °～4 mm × 45 °.
Preferably, both sides, described piston intake mouth side inlet channel spacing L1More than cylinder body mixed gas inlet width L2。
Further, the every side of described piston skirt air inlet side at least provided with: pure air inlet passage, in one logical
Road, ventilation passage, open channel one, an open channel two.
The invention has the beneficial effects as follows: a kind of piston that can realize guide's pure air stratification scavenging, piston in cylinder body to
In upper motor process, pure air inlet passage that substantial amounts of pure air can be provided with by piston, internal channel, ventilation passage enter
In enclosed scavenging air belt in cylinder body, it is layered with mixed Daqu in enclosed scavenging air belt, during scavenging, utilizes the guide in scavenging air belt
Pure air takes the lead in clearing away tail gas, then gaseous mixture scavenging, owing to the content of air pure in enclosed scavenging air belt is a lot, greatly reduces
The consumption of gaseous mixture, thus advantageously reduce the discharge of the compound such as HC and CO in tail gas, protect environment.
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 the present invention program piston shaft mapping
Fig. 2 the present invention program piston front view
Fig. 3 the present invention program piston left view
Fig. 4 the present invention program piston right view
Fig. 5 the present invention program cylinder body front view
Fig. 6 the present invention program pure air guide and pure air clear away tail gas schematic diagram with gaseous mixture
Fig. 7 the present invention program piston pure air inlet passage engages schematic diagram with air inlet
Fig. 8 the present invention program pure air flow path footpath schematic diagram.
Sequence number explanation in accompanying drawing: 1, piston；2, pure air inlet passage；3, open channel one；4, internal channel；5, open type is led to
Road two；6, ventilation passage；7, piston skirt；8, chamfering；9, pin-and-hole；10, cylinder body；11, pure air inlet；12, gaseous mixture enters
QI KOU；13, air vent；14, enclosed scavenging air belt；L1, air inlet side, two pure air inlet channel pitch；L2, cylinder body gaseous mixture enters
The width of QI KOU；F, pure air；C, pure air and gaseous mixture；H, gaseous mixture.
Detailed description of the invention
As shown in Fig. 1～Fig. 8, piston 1 include half-closed internal channel (include pure air inlet passage 2, open channel 1,
Internal channel 4, open channel 25, ventilation passage 6, pin-and-hole 8, chamfering 9), piston skirt 7.
Piston 1 piston skirt 7 air inlet side be respectively provided on two sides with half-closed internal channel, half-closed internal channel is by pure
Air inlet passage 2, internal channel 4, open channel 1, open channel 25, ventilation passage 6, pin-and-hole 9, chamfering 8 form.
Internal channel 4 is positioned at the bottom surface of pure air inlet passage 2, is provided with chamfering 8, in open channel 1 connection outside pin-and-hole 9
Passage 4 and chamfering 8, immediate boiling passage 1 is by through to pin-and-hole 9, chamfering 8, pure air inlet passage 2, internal channel 4.
Internal channel 4 is through with ventilation passage 6, through by open channel 25 between ventilation passage 6 and chamfering 8.Immediate boiling
Passage 25 is by through to pin-and-hole 9, chamfering 8, ventilation passage 6, internal channel 4.
Specific works process:
Piston 1 is in cylinder body 10 upwards in motor process, in certain crank angle range,
When pin-and-hole 9, chamfering 8 connect with the enclosed scavenging air belt 14 of cylinder body, pure air inlet 11 and the pure air inlet of cylinder body
Passage 2 communicates, and under crankcase suction function, pure air passes sequentially through following path respectively: the pure air inlet 11 of cylinder body
→ pure air inlet passage 2 → open channel, one 3 → pin-and-hole 9 and chamfering 8 → enclosed scavenging air belt 14；Meanwhile, pure air is also
By following path: pure air inlet 11 → pure air inlet passage 2 → internal channel, 4 → open channel 25 → pin of cylinder body
Hole 9 and chamfering 8 → enclosed scavenging air belt 14.
During piston 1 continues up in cylinder body 10, in certain crank angle range,
When pure air inlet passage 2 connects with the pure air inlet 11 of cylinder body, when pure air inlet passage 2, ventilation passage 6 with
When enclosed scavenging air belt 14 connects, under crankcase suction function, pure air passes sequentially through following path: the pure air inlet of cylinder body
Mouth 11 → pure air inlet passage 2 → enclosed scavenging air belt 14；Meanwhile, pure air is also by following path: the pure sky of cylinder body
Gas air inlet 11 → pure air inlet passage 2 → internal channel, 4 → ventilation passage 6 → enclosed scavenging air belt 14.
Pure air through above-mentioned path, enter enclosed scavenging air belt 14, and with mixed Daqu be layered, formed pure air F layer,
Pure air and gaseous mixture C layer, gaseous mixture H layer.
After mixture combustion does work, piston 1 moves downward, and crankcase pressure increases the gas in enclosed scavenging air belt 14
Press-in cylinder body 10 successively, tail gas is cleared away by pure air in advance, discharges from air vent 13, the purest air and gaseous mixture, mixed
Close gas and carry out scavenging successively, owing to substantial amounts of pure air is cleared away in advance, effectively reduce the application of gaseous mixture, effectively reduce tail
The discharge of gas, protects environment.
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 (8)
1. a layered scavenging two-stroke engine piston, including pin-and-hole (9), piston skirt (7), it is characterised in that: described work
Plug skirt section (7) air inlet side is respectively provided on two sides with half-closed internal channel, and described half-closed internal channel includes pure air inlet passage
(2), it is provided with internal channel (4) in the bottom of pure air inlet passage (2), in described internal channel (4) and described pin-and-hole (9) outside
It is provided with open channel one (3) between chamfering (8), is provided with the ventilation passage communicated with internal channel (4) in described pin-and-hole (9) bottom
(6), between described ventilation passage (6) and chamfering (8), it is provided with open channel two (5).
Layered scavenging two-stroke engine piston the most according to claim 1, it is characterised in that: described ventilation passage (6)
Air inlet area more than internal channel (4).
Layered scavenging two-stroke engine piston the most according to claim 2, it is characterised in that: described internal channel (4) is
Circular hole, described Circularhole diameter scope is 0.11～0.18 times of piston diameter, preferably 0.13～0.16 times piston diameter.
Layered scavenging two-stroke engine piston the most according to claim 2, it is characterised in that: described
Ventilation passage (6) is strip.
Layered scavenging two-stroke engine piston the most according to claim 2, it is characterised in that: described
Ventilation passage (6) is circular.
Layered scavenging two-stroke engine piston the most according to claim 1, it is characterised in that: described
Chamfering (8) size preferably 2 mm × 45 °～4 mm × 45 °.
Layered scavenging two-stroke engine piston the most according to claim 1, it is characterised in that: described
Piston (1) air inlet side both sides inlet channel (2) spacing L1More than cylinder body mixed gas inlet width L2。
8. according to the layered scavenging two-stroke engine piston described in any one of claim 1-7, it is characterised in that: described piston
The every side of skirt section (7) air inlet side is at least provided with internal channel (4), ventilation passage (6), open channel one (3), an open type
Passage two (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610350520.4A CN105840339B (en) | 2016-05-25 | 2016-05-25 | Layered scavenging two-stroke engine piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610350520.4A CN105840339B (en) | 2016-05-25 | 2016-05-25 | Layered scavenging two-stroke engine piston |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105840339A true CN105840339A (en) | 2016-08-10 |
| CN105840339B CN105840339B (en) | 2018-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610350520.4A Active CN105840339B (en) | 2016-05-25 | 2016-05-25 | Layered scavenging two-stroke engine piston |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762657A (en) * | 2016-08-19 | 2018-03-06 | 安德烈·斯蒂尔股份两合公司 | To purge the piston and two-stroke motor of the two-stroke motor of pre-stored amount work |
| 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 |
| CN113107661A (en) * | 2021-05-08 | 2021-07-13 | 永康市茂金园林机械有限公司 | Layered scavenging two-stroke engine |
| CN113107662A (en) * | 2021-05-08 | 2021-07-13 | 永康市茂金园林机械有限公司 | Cylinder piston unit for stratified scavenging two-stroke engine |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020043227A1 (en) * | 1999-01-19 | 2002-04-18 | Bo Carlsson | Two-stroke internal combustion engine |
| CN1472426A (en) * | 2002-05-24 | 2004-02-04 | 安德烈亚斯・斯蒂尔两合公司 | Two stroke engine |
| CN201560858U (en) * | 2009-11-30 | 2010-08-25 | 天津内燃机研究所 | Engine piston |
| CN102392760A (en) * | 2011-08-26 | 2012-03-28 | 山东华盛农业药械有限责任公司 | Carburetor of two-stroke layered scavenging engine |
| US20150219007A1 (en) * | 2014-02-02 | 2015-08-06 | Nagesh Siddabasappa Mavinahally | Piston and cylinder for two-stroke engine |
| CN205744178U (en) * | 2016-05-25 | 2016-11-30 | 山东华盛农业药械有限责任公司 | A kind of layered scavenging two-stroke engine piston |
-
2016
- 2016-05-25 CN CN201610350520.4A patent/CN105840339B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020043227A1 (en) * | 1999-01-19 | 2002-04-18 | Bo Carlsson | Two-stroke internal combustion engine |
| CN1472426A (en) * | 2002-05-24 | 2004-02-04 | 安德烈亚斯・斯蒂尔两合公司 | Two stroke engine |
| CN201560858U (en) * | 2009-11-30 | 2010-08-25 | 天津内燃机研究所 | Engine piston |
| CN102392760A (en) * | 2011-08-26 | 2012-03-28 | 山东华盛农业药械有限责任公司 | Carburetor of two-stroke layered scavenging engine |
| US20150219007A1 (en) * | 2014-02-02 | 2015-08-06 | Nagesh Siddabasappa Mavinahally | Piston and cylinder for two-stroke engine |
| CN205744178U (en) * | 2016-05-25 | 2016-11-30 | 山东华盛农业药械有限责任公司 | A kind of layered scavenging two-stroke engine piston |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107762657A (en) * | 2016-08-19 | 2018-03-06 | 安德烈·斯蒂尔股份两合公司 | To purge the piston and two-stroke motor of the two-stroke motor of pre-stored amount work |
| CN107762657B (en) * | 2016-08-19 | 2021-05-28 | 安德烈·斯蒂尔股份两合公司 | Piston for a two-stroke motor operating with a purging pre-stored quantity, and two-stroke motor |
| 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 |
| CN113107661A (en) * | 2021-05-08 | 2021-07-13 | 永康市茂金园林机械有限公司 | Layered scavenging two-stroke engine |
| CN113107662A (en) * | 2021-05-08 | 2021-07-13 | 永康市茂金园林机械有限公司 | Cylinder piston unit for stratified scavenging two-stroke engine |
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| Publication number | Publication date |
|---|---|
| CN105840339B (en) | 2018-03-20 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Stratified scavenging two-stroke engine piston Effective date of registration: 20211230 Granted publication date: 20180320 Pledgee: China Construction Bank Corporation Linyi Luozhuang sub branch Pledgor: SHANDONG HUASHENG PESTICIDE MACHINERY Co.,Ltd. Registration number: Y2021980017162 |
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Date of cancellation: 20230829 Granted publication date: 20180320 Pledgee: China Construction Bank Corporation Linyi Luozhuang sub branch Pledgor: SHANDONG HUASHENG PESTICIDE MACHINERY Co.,Ltd. Registration number: Y2021980017162 |
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