CN201354693Y - Device for controlling fuel evaporative emissions of motor vehicles - Google Patents
Device for controlling fuel evaporative emissions of motor vehicles Download PDFInfo
- Publication number
- CN201354693Y CN201354693Y CNU2009203007331U CN200920300733U CN201354693Y CN 201354693 Y CN201354693 Y CN 201354693Y CN U2009203007331 U CNU2009203007331 U CN U2009203007331U CN 200920300733 U CN200920300733 U CN 200920300733U CN 201354693 Y CN201354693 Y CN 201354693Y
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- CN
- China
- Prior art keywords
- pipeline
- carburetor
- charcoal jar
- desorption
- fuel evaporative
- 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.)
- Expired - Fee Related
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- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
A device for controlling fuel evaporative emissions of motor vehicles comprises a carbon canister and a petrol cut-off valve. An admission adsorption orifice of the carbon canister is connected with an oil tank breather via a fourth pipeline; the petrol cut-off valve is mounted on a first pipeline; a pressure control valve and an exhaust desorption orifice of the carbon canister are communicated with an air flue of a carburetor; the pressure control valve and the exhaust desorption orifice of the carbon canister are communicated with a three-way pipe via a second pipeline and the first pipeline; and after being communicated with the third pipeline, the three-way pipe is communicated with the carburetor. After adopting the technical scheme, the utility model not only decreases the discharge of fuel evaporative emissions, but also lowers the influence of the fuel evaporative emissions on operating mode emission, thereby ensuring that the exhaust emissions of motor vehicles meet more environment-friendly requirements.
Description
Technical field
The invention belongs to motor vehicle emission control technique field, specifically, relate to the fuel evaporation pollutant control system on the Motor Vehicle.
Background technique
Because ventilation and hot soak loss between daytime; used in fuel oil system of motor-driven vehicle can produce fuel evaporation pollutant, and fuel evaporation pollutant is a carbon compound, can not directly be discharged in the atmosphere; be protection environment, energy saving, China formulates the NBS that the motor vehicle fuel evaporative pollutant emission limit is arranged.
Existing Motor Vehicle is to install the charcoal jar additional to come fuel evaporation pollutant is adsorbed in oil-fired system, the charcoal jar is connected between fuel tank and the empty filter, the fuel evaporation pollutant of discharging from fuel tank enters the absorption of charcoal jar, enters Carburetor and air mixing then, forms mixed gas and enters engine combustion.Existing structure has plenty of the desorption point is arranged on the inlet manifold, because mixed gas may be very rare from the gas that the charcoal jar comes out, with after mixed gas that Carburetor is come mixes, thinning rich mixture, after mixed gas participates in burning like this, can produce unstable idle speed, also can influence the operating mode discharging, the operating mode discharge amount of CO can increase in general, also find in the test, if Motor Vehicle on empty filter, may occur the not enough phenomenon of negative pressure with the desorption point selection, can not guarantee effective desorption of charcoal jar intermediate fuel oil steam.
Summary of the invention
The purpose of this invention is to provide a kind of desorption quality that can improve fuel evaporation pollutant, thereby effectively reduce the motor vehicle fuel evaporative pollutant control system of discharge vaporization and operating mode discharging.
For achieving the above object, motor vehicle fuel evaporative pollutant control system provided by the invention, include charcoal jar and gasoline cut-off valve, the steam adsorption port of charcoal jar links to each other with oil tank breather by the 4th pipeline, the gasoline cut-off valve is installed on the 4th pipeline, and the steam desorption mouth of the pressure controlled valve of charcoal jar and charcoal jar all is connected with the air flue of Carburetor.
The present invention will all be connected with the air flue of Carburetor with the steam desorption mouth of charcoal jar and the pressure controlled valve of charcoal jar, improved the negative pressure in the 3rd pipeline, to satisfy the desorption pressure requirement of steam in the charcoal jar, guarantee that steam obtains abundant desorption in the charcoal jar, reduce discharge vaporization, and raising reduces the influence to the operating mode discharging from the fuel-steam quality of charcoal jar desorption; Pressure controlled valve with the charcoal jar links to each other with the Carburetor air flue simultaneously, has avoided being provided with at other positions the trouble of negative pressure point, such as the operation of having avoided processing on inlet manifold, thereby saved machining period, and, changed the circuit and the length of oil pipe, it is compact also to seem.
The desorption mouth of described charcoal jar is connected the back by first pipeline and second pipeline respectively with pressure controlled valve and links to each other with the 3rd pipeline with a three-way pipe, described the 3rd pipeline communicates with the air flue of Carburetor, and such setting has avoided opening the trouble of second air flue on Carburetor.Simultaneously, such structure seems that the circuit layout of charcoal jar is compact.
The tie point of above-mentioned the 3rd pipeline and Carburetor air flue is between Carburetor aditus laryngis and mixed gas outlet, and the negative pressure that makes full use of the generation of this section air flue improves the desorption pressure of steam in the charcoal jar.
Further, above-mentioned the 3rd pipeline is communicated with the Carburetor air flue by the desorption pipe on the Carburetor, and desorption pipe is installed in a side of idle adjusting screw on the Carburetor.Evidence, the high energy of negative pressure reaches 2Kpa herein, has fully satisfied the desorption pressure requirement of steam in the charcoal jar; Can also control from the fuel-steam quality of charcoal jar desorption, thereby reduce the influence of fuel-steam the operating mode discharging.
After adopting technical solution of the present invention, not only reduced the discharging of fuel evaporation pollutant, and reduced the influence of fuel evaporation pollutant, thereby made the exhaust emissions of Motor Vehicle reach environmental protection requirement more the operating mode discharging.
Description of drawings
Fig. 1 is the overall pie graph of control system of the present invention;
Fig. 2 is the outline drawing of Carburetor among the present invention;
Among the figure: 1. fuel tank; 2. oil tank breather; 3. gasoline cut-off valve; 4. pressure controlled valve; 5. the 4th pipeline; 6. the desorption mouth of giving vent to anger; 7. air inlet adsorption port; 8. engine air inlet tube; 9. charcoal jar; 10. motor; 12. Carburetor; 13. the 3rd pipeline; 14. empty filter; 15. desorption pipe; 16. idle adjusting screw; 17. oil pipe; 18. three-way pipe; 19. first pipeline; 20. second pipeline
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
As shown in Figure 1, it is the charcoal jar of 200ml that charcoal jar 9 adopts storage volumes, guarantees that it has sufficient adsorptive power, and normal sorption fuel-steam quality is about 20 grams.The air inlet adsorption port 7 of charcoal jar 9 links to each other with oil tank breather 2 by the 4th pipeline 5, and gasoline cut-off valve 3 is installed in the
On four pipelines 5, the pressure controlled valve 4 of charcoal jar 9 links to each other with three-way pipe 18 1 interfaces by second pipeline 20, and the desorption mouth 6 of giving vent to anger of charcoal jar 9 links to each other with the 3rd interface of three-way pipe 18 more afterwards by first pipeline 19 the 3rd pipeline 13 that links to each other with another interface of three-way pipe 18 that the air flue of Carburetor 12 is connected.The tie point of the 3rd pipeline 13 and Carburetor 12 air flues is between the aditus laryngis and mixed gas outlet of Carburetor 12.The 4th pipeline 5 is also referred to as adsorption tube, and second pipeline 20 is also referred to as the negative pressure pipe, and first pipeline 19 is also referred to as desorption pipe.
The 3rd pipeline 13 is connected with the air flue of Carburetor 12, can improve the negative pressure of 13 li of the 3rd pipelines, to satisfy the desorption pressure requirement of steam in the charcoal jar 9, guarantee that steam obtains abundant desorption in the charcoal jar 9, reduce discharge vaporization, and raising reduces the influence to the operating mode discharging from the fuel-steam quality of charcoal jar 9 desorptions.
As can be seen from Figure 2: the 3rd pipeline 13 is communicated with Carburetor 12 air flues by the desorption pipe 15 on the Carburetor 12, desorption pipe 15 is installed in a side of idle adjusting screw 16 on the Carburetor 12, along the distance of Carburetor plunger central direction and idle adjusting screw 16 for very near.Evidence, the high energy of negative pressure reaches two kPas herein, has fully satisfied the desorption pressure requirement of steam in the charcoal jar 9; Can also control from the fuel-steam quality of charcoal jar 9 desorptions, thereby reduce the influence of fuel-steam the operating mode discharging.
Referring to Fig. 1, the fuel-steam of evaporation enters the 4th pipeline 5 by oil tank breather 2 in the closed tank 1, enters the charcoal jar 9 from air inlet adsorption port 7 through gasoline cut-off valve 3 backs to store; When motor 10 operations, Carburetor produces negative pressure is opened charcoal jar 9 by second pipeline 20 pressure controlled valve 4, give vent to anger the desorption mouth 6 and first pipeline 19 and three pipeline of fuel-steam by charcoal jar 9 that is stored in the charcoal jar 9 enters Carburetor 12, and enters motor 10 after the air mixing of coming from empty filter 14 and participates in burning.
Claims (4)
1. motor vehicle fuel evaporative thing control gear, comprise charcoal jar and gasoline cut-off valve, the air inlet desorption mouth of charcoal jar links to each other with oil tank breather by the 4th pipeline, the gasoline cut-off valve is installed on the 4th pipeline, it is characterized in that: the desorption mouth of giving vent to anger of the pressure controlled valve of charcoal jar and charcoal jar all is connected with the air flue of Carburetor.
2. motor vehicle fuel evaporative thing control gear according to claim 1, it is characterized in that: the desorption mouth of giving vent to anger of the pressure controlled valve of described charcoal jar and charcoal jar is connected the back by second pipeline and first pipeline respectively and is connected with the 3rd pipeline with a three-way pipe, the 3rd pipeline is connected with the air flue of Carburetor.
3. motor vehicle fuel evaporative thing control gear according to claim 2 is characterized in that: the tie point of described the 3rd pipeline and Carburetor air flue is between Carburetor aditus laryngis and mixed gas outlet.
4. motor vehicle fuel evaporative thing control gear according to claim 3 is characterized in that: described the 3rd pipeline is communicated with the Carburetor air flue by the desorption pipe on the Carburetor, and desorption pipe is installed in a side of idle adjusting screw on the Carburetor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203007331U CN201354693Y (en) | 2009-02-20 | 2009-02-20 | Device for controlling fuel evaporative emissions of motor vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009203007331U CN201354693Y (en) | 2009-02-20 | 2009-02-20 | Device for controlling fuel evaporative emissions of motor vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201354693Y true CN201354693Y (en) | 2009-12-02 |
Family
ID=41411034
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2009203007331U Expired - Fee Related CN201354693Y (en) | 2009-02-20 | 2009-02-20 | Device for controlling fuel evaporative emissions of motor vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201354693Y (en) |
-
2009
- 2009-02-20 CN CNU2009203007331U patent/CN201354693Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091202 Termination date: 20130220 |