CN87207702U - Stratified scavenging device for two-cycle gasoline machine - Google Patents
Stratified scavenging device for two-cycle gasoline machine Download PDFInfo
- Publication number
- CN87207702U CN87207702U CN198787207702U CN87207702U CN87207702U CN 87207702 U CN87207702 U CN 87207702U CN 198787207702 U CN198787207702 U CN 198787207702U CN 87207702 U CN87207702 U CN 87207702U CN 87207702 U CN87207702 U CN 87207702U
- Authority
- CN
- China
- Prior art keywords
- air
- cycle gasoline
- scavenging
- gasoline machine
- waste gas
- 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.)
- Withdrawn
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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
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B75/00—Other engines
- F02B75/02—Engines characterised by their cycles, e.g. six-stroke
- F02B2075/022—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle
- F02B2075/025—Engines characterised by their cycles, e.g. six-stroke having less than six strokes per cycle two
Abstract
The utility model relates to a stratified scavenging device for a two-cycle gasoline machine, belonging to an oil-saving device in the working of the two-cycle gasoline machine. The utility model is arranged on the air scavenging passage of an engine, and the stratified scavenging device for a two-cycle gasoline machine can make the fresh mixing gas separate from the waste gas in a cylinder in the scavenging process. Thus, the stratified scavenging device for a two-cycle gasoline machine can realize to scavenge the waste gas with the air and avoid the fuel contact the waste gas in the cylinder and directly escaping along with the waste gas in the cylinder in the scavenging process. Under the action of a slide valve, the idling performance and the starting performance of the engine can be satisfied. The method is adopted, the specific fuel consumption of the two-cycle gasoline machine approaches the specific fuel consumption of a four-cycle gasoline machine under the operating condition, and the exhaust performance is improved.
Description
The utility model belongs to the gasoline-saving device of installing on the two-stroke gasoline engine in the dynamic power machine.
At present, in the two-stroke gasoline engine fuel-saving technique research field, adopt its characteristics of stratified charge fuel-economizing mode to be: in intake process, most air passes through intake duct, under the control of air door, enter crankcase through leaf valve, the small part air forms rich mixtures with required whole fuel under carburetor throttle control, enter the external pipe of crankcase through another leaf valve, and be stored in the pipeline.
In scavenging process, air and the rich mixture in the crankcase external pipe compressed in the crankcase enter cleaning exhaust gas inside cylinder in the cylinder simultaneously.This stratified charge mode is not owing to change the situation that waste gas directly contacts in rich mixture and the cylinder, thereby the interior layered effect of cylinder is not obvious, causes the mixing again of mixed gas and waste gas, partially mixed gas escape when making scavenging.The air that enters in the crankcase has strict demand with the ratio that passes through the rich mixture that forms behind the vaporizer, even can only satisfy the oil-saving effect of corresponding operating mode under the ratio ideal situation, and can not satisfy the oil-saving effect of whole working condition.
Because in the crankcase is air, so the bearing lubrication problem in the connecting rod is difficult to solution, unless establish the engine oil supplying device in addition.Though this stratified charge mode has solved the fuel-economizing problem of corresponding operating mode, complex structure is difficult for applying on existing two stroke engine.
The utility model is on the basic basis of invariable of existing two stroke engine structure, adopts the way that stratification scavenge device is installed on the motor scavenging air belt to reach significant oil-saving effect.Its characteristics are: utilize the pressure difference in the crankcase that ambient air is sent into the scavenging air belt space by the stratification scavenge device that is arranged on the scavenging air belt before scavenging process begins.Make to be full of air in the scavenging air belt, having formed in the crankcase is inflammable mixture, is air in each scavenging air belt, is the stratified condition of waste gas in the cylinder.When beginning, scavenging process utilizes the waste gas in the compressed air purging cylinder, and inflammable mixture is in the rear portion of air layer, does not directly contact with waste gas, after scavenging process finishes, air is discharged outside the cylinder with waste gas, and the inflammable mixture at its rear portion is stayed the combustor inner cylinder work done.The amount of air layer depends in the existing scavenging mode inflammable mixture with the escape amount of waste gas, and along with air fuel ratio is regulated in the change of engine operating condition automatically.
Accompanying drawing is the utility model structural representation.
As shown in drawings: guiding valve control backguy 1, guiding valve 2, connecting tube 3, air check valve 4, air check valve sheet 5.
Working method of the present utility model is: when motor is in normal working, guiding valve control backguy 1 is opened guiding valve 2 with throttle linkage, ambient air under the pressure difference effect through connecting tube 3, air check valve 4, air check valve sheet 5 enters scavenging air belt space 6, forms layered scavenging.Guiding valve 2 cuts out (having little air to pass through) when engine start, idling.Air check valve 4 is installed on the motor scavenging air belt wall, makes it to communicate with scavenging air belt.According to the structure needs, air check valve and guiding valve also can be designed to more than 1.
Owing to realized layered scavenging, reduced the loss of fuel, the exhaust gas concentration that remains in behind air scavenging in the cylinder obtains dilution, with waste gas discharge the outer air of cylinder can be further in exhaust with waste gas in carbon monoxide, hydrocarbon chemical reaction.Therefore compared with prior art, under the situation that power does not reduce, whole working condition has significant oil-saving effect.Can make minimum specific fuel consumption near the four-stroke gasoline engine level.Carbon monoxide in the discharging waste gas, hydrocarbons content have reduction significantly.
Claims (1)
1, a kind of stratification scavenge device that reduces the two-stroke gasoline engine oil consumption and improve emission performance that is applicable to, it is characterized in that: this device is made up of guiding valve control backguy 1, guiding valve 2, connecting tube 3, air check valve 4 and air check valve sheet 5, guiding valve control backguy 1 is installed on the guiding valve 2, guiding valve 2 connects with connecting tube 3, at connecting tube 3 the other ends air check valve 4 and air check valve sheet 5 are installed, one-way valve 4 is fixed on the motor scavenging air belt wall and with scavenging air belt and communicates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198787207702U CN87207702U (en) | 1987-05-02 | 1987-05-02 | Stratified scavenging device for two-cycle gasoline machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN198787207702U CN87207702U (en) | 1987-05-02 | 1987-05-02 | Stratified scavenging device for two-cycle gasoline machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87207702U true CN87207702U (en) | 1988-10-12 |
Family
ID=4823102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN198787207702U Withdrawn CN87207702U (en) | 1987-05-02 | 1987-05-02 | Stratified scavenging device for two-cycle gasoline machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87207702U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032151A (en) * | 2011-09-29 | 2013-04-10 | 浙江派尼尔机电有限公司 | Air-replenishing scavenging engine |
| CN106640369A (en) * | 2016-10-19 | 2017-05-10 | 宁波大叶园林设备有限公司 | One-way valve type uniflow scavenging two-stroke engine |
-
1987
- 1987-05-02 CN CN198787207702U patent/CN87207702U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032151A (en) * | 2011-09-29 | 2013-04-10 | 浙江派尼尔机电有限公司 | Air-replenishing scavenging engine |
| CN106640369A (en) * | 2016-10-19 | 2017-05-10 | 宁波大叶园林设备有限公司 | One-way valve type uniflow scavenging two-stroke engine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |