CN101239582B - Vapor recovery system for vehicle fuel tanks - Google Patents
Vapor recovery system for vehicle fuel tanks Download PDFInfo
- Publication number
- CN101239582B CN101239582B CN2008100054881A CN200810005488A CN101239582B CN 101239582 B CN101239582 B CN 101239582B CN 2008100054881 A CN2008100054881 A CN 2008100054881A CN 200810005488 A CN200810005488 A CN 200810005488A CN 101239582 B CN101239582 B CN 101239582B
- Authority
- CN
- China
- Prior art keywords
- flow passage
- chamber
- recovery system
- vapor
- inlet
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/0854—Details of the absorption canister
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
- F02M25/08—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture adding fuel vapours drawn from engine fuel reservoir
- F02M25/089—Layout of the fuel vapour installation
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
Abstract
A vapour recovery system for a vehicle fuel tank comprising a canister defining at least one chamber containing an adsorbent material for adsorbing fuel from fuel vapour laden air, the canister having an inlet for communication with the headspace of a vehicle fuel tank, a vent outlet for communication with the atmosphere and a purge outlet for communication with the air intake of the vehicle engine, a first flow path between the inlet and the vent outlet, and a second flow path between the inlet and the purge outlet, wherein the second flow path has a greater flow restriction and/or residence time than the first flow path.
Description
Technical field
The present invention relates to the vapor-recovery system of vehicle fuel tank, comprise and hold a kind ofly that as carbon, the container of sorbing material is in order to from the air absorption fuel oil that is filled with fuel-steam and be particularly related to the vapor-recovery system that is suitable for need not discharge-service valve.
Background technology
Need discharged air space (being called upper space) on the top of vehicle fuel tank so that avoid in use when fuel tank is empty, along with fuel oil injects the air-lock of fuel tank when from the upper space air-out, and compensation is owing to fuel oil evaporation and the variation of pressure in the upper space of consequential condensation in the temperature traverse around in the oiling process.
But vehicular emission standards is provided with restriction to the discharge vaporization from the fuel-steam of vehicle fuel tank and fuel oil system.In order to realize these effluent standards, the most modern vehicle set discharging and vapor-recovery system are so that prevent in refueling process, in the release of vehicle operation neutralization fuel-steam during when stationary vehicle, the volume that allows air and fuel-steam in the fuel tank simultaneously changes with the variation of fuel oil volume.
As illustrated in fig. 1 and 2, the representative type vapor-recovery system comprises a contactor 1, it comprises activated carbon filtration modulator material 2, has the inlet 3 that is connected to fuel tank upper space discharge-channel, with collect fuel-steam allow when the group refueling simultaneously air by-pass passage through discharge side 4 in atmosphere.Termly, when vehicle operation, the fuel-steam that gathers in container of absorption passes through through container, and process is got rid of with exhaust outlet 5 aspirated airs of the air admission system connectivity of driving engine, and the fuel-steam that adsorbs is removed in burning in driving engine like this.The hydrocarbons of desorption is sent to driving engine and burning.
The radical function of container is to absorb steam and reduce because from the environmental pollution of the discharge vaporization of petrol power driving engine from fuel oil system.
Typically, vapor-recovery system is included in the blowoff valve 6 between vessel discharge outlet 5 and the driving engine.Control by ECU for this blowoff valve 6 (being generally solenoid electric valve) of most systems.This ECU opens valve termly and flows to driving engine to allow hydrocarbons.Require regular working to send to the amount of the hydrocarbons of driving engine with restriction.This performance to driving engine, driving function and automotive exhaust gas are epochmaking.
Directly from the aeration vent to the exhaust outlet, partition wall 7 extends between aeration vent and exhaust outlet in container 1 for fear of air by-pass passage.
In some applications, as the power cart, use mechanical valve replacement solenoid electric valve is with simplified system and reduce total cost.In this scheme, this valve does not provide the device of hydrocarbons control in engine working process.Its functional limitation is in ON/OFF work.This valve opens all the time in discharging and then keeps cutting out when driving engine stops, the discharging of the mobile and reduction steam of restriction steam from the container to the engine pipeline.
But, for using the needs of wishing to eliminate to blowoff valve cheaply.
Summary of the invention
According to the vapor-recovery system that the invention provides a kind of vehicle fuel tank, it comprises that limiting at least one holds sorbent material so that from the container in the chamber of the absorption fuel oil of the air that is filled with fuel-steam, the promising inlet that is communicated with the upper space of vehicle fuel tank of this vessel, be aeration vent and the exhaust outlet that is communicated with atmosphere for being communicated with the admission port of vehicle motor, first flow passage between inlet and the aeration vent and second flow passage between inlet and the exhaust outlet, wherein second flow passage has limitation of delivery and/or the dwell time bigger than first flow passage.
Because the higher restriction of flow passage and/or big dwell time between metal device inlet and the exhaust outlet, steam preferentially flow to aeration vent from container entrance.This just eliminates the needs of the blowoff valve relevant with exhaust outlet.
The cross-sectional area of first flow passage is greater than the cross-sectional area of second flow passage in one embodiment.The smallest cross-section area of preferred first flow passage is greater than the smallest cross-section area of second flow passage.Another selection, or in addition, the sorbing material that is arranged in second flow passage has the higher restriction of sorbing material that is arranged in first flow passage for the ratio of the passage of air.
Container can be provided with another inlet to be connected to atmosphere in order to atmosphere is supplied to described second flow passage.
Preferably container is divided into first and second chambeies, each of described first and second chambeies has the arrival end that is communicated with described container entrance, at the exit end place in first chamber described aeration vent is set and at the exit end place in described second chamber institute's art exhaust outlet is set simultaneously, described first flow passage comprising the absorption flow passage is defined through described first chamber, comprises that simultaneously described second flow passage of discharge flow path is defined through described second chamber.
This second chamber can have the zone of the cross-sectional area of at least one restriction, being provided at the flow restriction in the discharge flow path, and at least one zone of comparatively large cross-sectional area, so that the adsorption capacity of increase to be provided.This second chamber can be provided with the fresh air inlet in its side regions.
Description of drawings
Only with way of example, embodiment of the invention will be described with reference to drawings now, wherein:
Fig. 1 is in the cyclic process of container payload, as when vehicle is not worked, and the schematic views of known steam recovery system.
Fig. 2 is the schematic views of the vapor-recovery system of Fig. 1 in the vessel discharge cyclic process.
Fig. 3 is the schematic views according to the vapor-recovery system of the first embodiment of the present invention.
Fig. 4 is the schematic views of vapor-recovery system according to a second embodiment of the present invention.
Fig. 5 is the schematic views of the vapor-recovery system of a third embodiment in accordance with the invention.
Fig. 6 is the schematic views of the vapor-recovery system of a fourth embodiment in accordance with the invention.
The specific embodiment
In the first embodiment of the present invention, as shown in Figure 3, the vapor-recovery system of vehicle fuel tank comprises the container 10 that is divided into first and second chambeies 11,12, and the entity of a sorbent material 18 is contained in each chamber, as active carbon, in order to adsorb fuel oil from the air that is filled with fuel-steam.This container 10 has inlet 13, the aeration vent 14 that is communicated with atmosphere and the exhaust outlet 15 in order to be communicated with the air inlet of vehicle motor of the upper space that is used to be connected to vehicle fuel tank.This first chamber 11 limits discharge flow path 17 in second chamber 12 simultaneously at qualification absorption flow passage 16 between inlet and the aeration vent between inlet and exhaust outlet.In the embodiment shown in fig. 3, wideer thereby this discharge flow path in 11 to the second chambeies 12, first chamber has bigger flow limitation than absorption flow passage.
The flow restriction of discharge flow path 17 is absorption two times of flow passage 16 at least, therefore preferably 13 flows to aeration vent 14 through absorption flow passage 16 from entering the mouth from the air that is filled with steam of fuel tank upper space.
In the process that stops, because the sorbent material 18 in the discharge flow path 17 is from fuel tank absorption fuel-steam seldom, so it keeps very cleaning.When engine starting, because mobile from the steam in container first chamber 11 through the sorbent material in the discharge flow path 17 in the vacuum that engine inlet port produces.Under this condition, discharge flow path 17 plays delay line, so driving engine can preheating before starting from the fuel-steam arrival of container.This just improves the performance of driving engine and helps to control exhaust emission.
In the second embodiment of the present invention shown in Figure 4, sorbent material 20b is contained in second chamber 12 that limits discharge flow path 17, this material has than the bigger resistance of sorbent material 20a that contains in first chamber, with further throttle steam flowing through the discharge flow path.
In the 3rd embodiment shown in Figure 5, narrower transverse cross-sectional area 22,23 is contained so that the restriction of flowing in the discharge flow path to be provided in second chamber 12, and the cross-sectional plane of the broad of the volume area therebetween 24 that increases is to provide bigger adsorption capacity.This just improves the performance of vapor-recovery system.The big transverse cross-sectional area 24 in second chamber 12 increases the steam dwell time in second chamber 24, so reduce the peak concentration of exhaust outlet 15 place's hydrocarbons.
In the 4th embodiment shown in Figure 6, can provide air mix facilities with further improvement system performance.Fresh air in the side area in second chamber 12 fresh air inlet 30 is set so that can be drawn in the discharge flow path 17 peak concentration with further reduction exhaust outlet 15 place's hydrocarbons.
Can be on single system, the power cart as in the developing country uses vapor-recovery system of the present invention, avoiding the use of control cock, reduces the total cost of vapor-recovery system and improves the reliability of system, because do not need movable part.
Technical personnel can make an amendment or changes embodiments of the invention in not departing from the scope of the present invention that claims limit.Though described the present invention in conjunction with the preferred embodiments, should understand and be not in order to limit the present invention.
Claims (8)
1. the vapor-recovery system of vehicle fuel tank, comprise and limit the container that at least one contains the chamber of sorbent material, to adsorb fuel oil from the air that is filled with fuel-steam, this container has the inlet that is communicated with the vehicle fuel tank upper space, aeration vent that is communicated with atmosphere and the exhaust outlet that is communicated with the vehicle motor air inlet, first flow passage between inlet and the aeration vent, and second flow passage between inlet and the exhaust outlet, wherein second flow passage has flow limitation and/or the dwell time bigger than first flow passage.
2. vapor-recovery system as claimed in claim 1, wherein the cross-sectional area of first flow passage is bigger than the cross-sectional area of second flow passage.
3. vapor-recovery system as claimed in claim 1, wherein the smallest cross-section area of first flow passage is bigger than the smallest cross-section area of second flow passage.
4. vapor-recovery system as claimed in claim 1, the sorbent material that wherein is in second flow passage has the higher restriction for air by-pass passage than the sorbent material that is in first flow passage.
5. vapor-recovery system as claimed in claim 1, wherein container is provided with another inlet to be connected to atmosphere in order to supply with atmosphere in described second flow passage.
6. vapor-recovery system as claimed in claim 1, this container is separated into first and second chamber, each of described first chamber and second chamber has the arrival end that is communicated with described inlet at its first end place, described aeration vent is set at the exit end place in first chamber at the exit end place in described second chamber described exhaust outlet is set simultaneously, wherein saidly comprise that first flow passage that adsorbs flow passage is defined described second flow passage that comprises the discharge flow path simultaneously and is defined through described second chamber through described first chamber.
7. vapor-recovery system as claimed in claim 6, wherein second chamber has the zone of the cross-sectional area of at least one restriction, so that the flow restriction in the discharge flow path to be provided, and the zone of at least one comparatively large cross-sectional area, so that the adsorption capacity of increase to be provided.
8. as claim 6 or the described vapor-recovery system of claim 7, wherein said second chamber is provided with the fresh air inlet in its side regions.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP07250510A EP1956228A1 (en) | 2007-02-08 | 2007-02-08 | Vapour recovery system for a vehicle fuel tank |
| EP07250510.0 | 2007-02-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101239582A CN101239582A (en) | 2008-08-13 |
| CN101239582B true CN101239582B (en) | 2010-08-04 |
Family
ID=38198022
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100054881A Expired - Fee Related CN101239582B (en) | 2007-02-08 | 2008-02-05 | Vapor recovery system for vehicle fuel tanks |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1956228A1 (en) |
| CN (1) | CN101239582B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9694310B2 (en) | 2014-08-11 | 2017-07-04 | Stant Usa Corp. | Fuel vapor recovery canister |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4320384A1 (en) * | 1993-06-19 | 1994-12-22 | Mann & Hummel Filter | Activated carbon filter for fuel tank ventilation |
| US5957114A (en) | 1998-07-17 | 1999-09-28 | Ford Motor Company | Evaporative emission canister for an automotive vehicle |
| US6237574B1 (en) * | 1999-04-20 | 2001-05-29 | Ford Motor Company | Evaporative emission canister for an automotive vehicle |
| EP1507081A1 (en) | 2003-08-12 | 2005-02-16 | Delphi Technologies, Inc. | Evaporated fuel processing device |
-
2007
- 2007-02-08 EP EP07250510A patent/EP1956228A1/en not_active Withdrawn
-
2008
- 2008-02-05 CN CN2008100054881A patent/CN101239582B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9694310B2 (en) | 2014-08-11 | 2017-07-04 | Stant Usa Corp. | Fuel vapor recovery canister |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101239582A (en) | 2008-08-13 |
| EP1956228A1 (en) | 2008-08-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7900607B2 (en) | Fuel vapor storage and recovery apparatus | |
| JP6140224B2 (en) | Method and system for reducing emissions from an evaporative emissions control system | |
| JP7183244B2 (en) | Evaporative emission device and adsorbent | |
| CN101468599A (en) | Evaporative emission control system with new adsorbents | |
| US20080308075A1 (en) | Automotive fuel system for substantially reducing hydrocarbon emissions into the atmosphere, and method | |
| EP2689952B1 (en) | Fuel vapor storage and recovery apparatus | |
| US20080308074A1 (en) | Evaporative emissions canister with external membrane | |
| US20080308073A1 (en) | Evaporative emissions canister having an integral membrane | |
| WO2009080127A1 (en) | Fuel vapor storage and recovery apparatus | |
| KR102008195B1 (en) | Fuel Steam Filters for Tank Ventilation in Vehicles with Improved Filling Characteristics | |
| US20080308072A1 (en) | Hydrocarbon separation from air using membrane separators in recirculation tube | |
| CN101239582B (en) | Vapor recovery system for vehicle fuel tanks | |
| JPWO2019003157A5 (en) | ||
| EP1503072B1 (en) | Evaporated fuel processing device | |
| JPS63176650A (en) | Fuel vapor catching device | |
| US10480458B2 (en) | Device having an activated carbon canister and motor vehicle having such a device | |
| CN201334969Y (en) | Automobile oil filter canister | |
| EP1844229A1 (en) | A system for controlling the emissions of fuel vapours from a vehicle | |
| JPS63117155A (en) | Fuel vapor catching device | |
| JP2014532136A (en) | Activated carbon filter for fuel tanks with storage volume | |
| CN201351547Y (en) | Charcoal canister for gas filtration of car and motorcycle | |
| JPS63154850A (en) | Vaporized fuel disposing device for vehicle | |
| US11867140B1 (en) | Evaporative emissions canister with layered carbon | |
| US20240115986A1 (en) | Self-cleaning air filter assembly | |
| CN215109214U (en) | Evaporative emission mitigation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200409 Address after: Babado J San Michaele Patentee after: DELPHI TECHNOLOGIES IP Ltd. Address before: Michigan, USA Patentee before: Delphi Technologies, Inc. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100804 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |