CN201627652U - Fuel oil evaporation and desorption control device - Google Patents
Fuel oil evaporation and desorption control device Download PDFInfo
- Publication number
- CN201627652U CN201627652U CN2009202069684U CN200920206968U CN201627652U CN 201627652 U CN201627652 U CN 201627652U CN 2009202069684 U CN2009202069684 U CN 2009202069684U CN 200920206968 U CN200920206968 U CN 200920206968U CN 201627652 U CN201627652 U CN 201627652U
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- China
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- carburetor
- desorption
- conduit
- control valve
- charcoal jar
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- Expired - Fee Related
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- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
The utility model discloses a fuel oil evaporation and desorption control device which comprises an oil tank (1), a canister (6), a PVC control valve (4), an air filter (11), a carburetor (9) and an engine (13); the oil tank (1) is connected with a canister adsorption port (3) by a conduit (2), a canister desorption port (5) is connected with a desorption port (10) of the carburetor by a conduit, one end of the carburetor (9) is connected with the engine (13) by a conduit, the other end of the carburetor is connected with the air filter (11), the PVC control valve (4) is connected with a carburetor negative pressure port (8); the fuel oil evaporation and desorption control device with the structure not only solves the problems of unstable idling, excess emission under idling and low speed conditions, but also reduces the cost, has simple structure, good desorption effect and easy integral layout.
Description
Technical field
The utility model relates to a kind of motorcycle fuel evaporation desorption control gear that is mainly used in.
Background technique
The country from July 1st, 2008, come into effect " motorcycle pollutant emission limit and method of measurement (operating condition method) " (GB14622-2007), " trail bike pollutant emission limit and method of measurement " (GB18176-2007) and " motorcycle and trail bike fuel evaporation pollutant emission limit and method of measurement " (GB20998-2007).The structure of fuel evaporation desorption control gear is as follows at present: the desorption of charcoal jar connects the desorption mouth of Carburetor, the PCV control valve of charcoal jar is connected on the suction tude between Carburetor and the motor, this Placement have following drawback: a, since intake pipe negative pressure higher when idling, low speed, the diaphragm of PCV control valve is opened at once behind the engine start, the charcoal jar begins desorption, oily vapours enters motor by Carburetor and burns, make air-fuel ratio, influence the idle stability and the idle exhaust emission of vehicle; B, this Placement because air fuel ratio is dense, cause problems such as easy carbon deposit of motor and burning spark plug when low speed, idling, motorcycle performance and reliability are had considerable influence; C, because the negative pressure of the suction tude between Carburetor and the cylinder head is very high, especially negative pressure is higher during the high speed oil return, damages the diaphragm of PCV control valve easily.
Summary of the invention
Existing fuel evaporation desorption apparatus is insufficient in idling, low speed burning in order to overcome, CO too high, the easy carbon deposit of discharging and burn spark plug, diaphragm problems such as damage easily during idling low speed, and the purpose of this utility model provides the fuel evaporation desorption control gear of a kind of simple and reasonable, sufficient combustion, emission compliance, long service life.
The technological scheme that its technical problem that solves the utility model adopts, a kind of fuel evaporation desorption control gear, comprise fuel tank, charcoal jar, PCV control valve, air-strainer, Carburetor, motor, described fuel tank is connected with charcoal jar adsorption port by conduit, charcoal jar desorption mouth is connected with the desorption mouth of Carburetor by conduit, Carburetor is connected with motor by conduit one end, and the other end is connected with air-strainer, and described PCV control valve is connected with Carburetor negative pressure mouth.
Can form vapor tension when the fuel evaporation in the fuel tank in fuel tank, under certain pressure, steam enters the charcoal jar from charcoal jar adsorption port and is absorbed by active carbon by conduit.When reaching certain rotating speed, Carburetor negative pressure mouth place, the motor operation produces negative pressure, when it rises to certain pressure, the PCV control valve is opened, the desorption mouth negative pressure of charcoal jar makes extraneous air enter the charcoal jar from atmospheric air port simultaneously, make the fuel vapor that is adsorbed on the interior active carbon of charcoal jar carry out desorption, enter engine combustion through Carburetor and suction tude again.
Description of drawings
Fig. 1 is the utility model charcoal jar desorption apparatus structural drawing.
Embodiment
Referring to Fig. 1, a kind of fuel evaporation desorption control gear, comprise fuel tank 1, charcoal jar 6, PCV control valve 4, air-strainer 11, Carburetor 9, motor 13, described fuel tank 1 is connected with charcoal jar adsorption port 3 by conduit, charcoal jar desorption mouth 5 is connected with the desorption mouth 10 of Carburetor by conduit, Carburetor 9 is connected with motor 13 by conduit one end, the other end is connected with air-strainer 11, fresh air enters from charcoal jar atmospheric air port 7, it is characterized in that: described PCV control valve 4 is connected with Carburetor negative pressure mouth 8.
After the utility model adopts said structure, the unlatching of charcoal jar PCV control valve is by the negative pressure control of Carburetor negative pressure mouth, when engine idle, low speed, the negative pressure of Carburetor negative pressure mouth is lower, PCV is in closed condition, charcoal jar this moment desorption not, when raising along with engine speed, the negative pressure of Carburetor negative pressure mouth increases, and opens PCV, and the charcoal jar begins desorption, thereby efficiently solve existing Placement and just begin desorption at idling, low speed, cause air fuel ratio dense, influence the stability and the CO effluent concentration of idling, also solved problems such as PCV diaphragm life-span simultaneously.The utility model the time just begins desorption because the charcoal jar does not carry out desorption when idling, low speed in middle and high speed, thus make engine air-fuel ratio rationally, sufficient combustion, emission effect be good, motor is not easy carbon deposit and burns spark plug.It is low, simple in structure also to have cost, and desorption is effective, advantage such as layout is easy on car load.
Claims (1)
1. fuel evaporation desorption control gear, comprise fuel tank (1), charcoal jar (6), PCV control valve (4), air-strainer (11), Carburetor (9), motor (13), described fuel tank (1) is connected with charcoal jar adsorption port (3) by conduit (2), charcoal jar desorption mouth (5) is connected with the desorption mouth (10) of Carburetor by conduit, Carburetor (9) is connected with motor (13) by conduit one end, the other end is connected with air-strainer (11), it is characterized in that: described PCV control valve (4) is connected with Carburetor negative pressure mouth (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202069684U CN201627652U (en) | 2009-11-03 | 2009-11-03 | Fuel oil evaporation and desorption control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202069684U CN201627652U (en) | 2009-11-03 | 2009-11-03 | Fuel oil evaporation and desorption control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201627652U true CN201627652U (en) | 2010-11-10 |
Family
ID=43059047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202069684U Expired - Fee Related CN201627652U (en) | 2009-11-03 | 2009-11-03 | Fuel oil evaporation and desorption control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201627652U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033292A (en) * | 2014-06-05 | 2014-09-10 | 东风汽车公司 | Automobile engine charcoal canister desorption device |
-
2009
- 2009-11-03 CN CN2009202069684U patent/CN201627652U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033292A (en) * | 2014-06-05 | 2014-09-10 | 东风汽车公司 | Automobile engine charcoal canister desorption device |
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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 |
Granted publication date: 20101110 Termination date: 20171103 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |