WO2004036024A1 - Temporary vehicle fuel vapour accumulator - Google Patents
Temporary vehicle fuel vapour accumulator Download PDFInfo
- Publication number
- WO2004036024A1 WO2004036024A1 PCT/IT2003/000637 IT0300637W WO2004036024A1 WO 2004036024 A1 WO2004036024 A1 WO 2004036024A1 IT 0300637 W IT0300637 W IT 0300637W WO 2004036024 A1 WO2004036024 A1 WO 2004036024A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- accumulator
- layer
- retaining
- chamber
- filtering
- Prior art date
Links
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
Definitions
- the present invention relates to a temporary vehicle fuel vapour accumulator.
- Known canisters substantially comprise a chamber filled with adsorbent material, such as activated carbon in granules.
- the characteristics, in particular the grain size, of the activated carbon inside must remain unchanged; for which purpose, the granules must be compacted with no possibility of relative movement.
- the storage chamber with a movable first wall or wall portion, which is loaded by springs or by means of spongy material to exert constant pressure on the activated carbon granules; and a second wall defined by a metal grille fitted with retaining and filtering means, or so-called retaining felts, made of polyester and which should provide for effectively filtering air flow in and out of the canister, while at the same time preventing any load loss.
- the first layer and second layer are made of polymer material.
- Number 1 in the accompanying drawing indicates a temporary fuel vapour accumulator or canister comprising a substantially cylindrical casing 2, in turn comprising a top end wall 3; a lateral wall 4; a bottom cover 5; and a vertical inner partition wall 6 extending axially from end wall 3 along a diametrical plane of casing 2 down to a distance D from cover 5, and cooperating hermetically with lateral wall 4 of casing 2.
- Two blanks of a retaining and filtering web material 7 are fixed parallel to and a short distance from top wall 3 against spacer pins 31 on opposite sides of partition wall 16, so as to form, with top wall 3 and partition wall 6, a first and second compartment 8 and 9 interfacing canister 1 with the outside, as explained in detail later on.
- web material 7 is welded, e.g. hot-blade welded, to peripheral shoulders 18 projecting inwards from top end wall 3.
- Web material 7 defines, upwards, a main chamber 10 of canister 1, which is divided by partition wall 6 into two top compartments 11, 12, and has a continuous bottom portion 13 by which compartments 11, 12 communicate.
- Chamber 10 houses granular adsorbent material 14, such as activated carbon.
- retaining and filtering web material 7 is a multilayer web material including a first layer 7a, preferably of polymer material, in particular polycarbonate, for ensuring the necessary rigidity of retaining and filtering web material 7; and a second layer 7b of polymer material, preferably a nonwoven fabric of polyester or polyamide, in particular aromatic polyamide (or so-called aramide) , for ensuring the necessary filtration capacity.
- the total weight of web material 7 preferably ranges between 150 and 200 gr/sq.m, and is preferably 190 gr/sq.m, and the total thickness preferably ranges between 0.6 and 1.5 mm, is preferably about 0.9 mm, and is therefore advantageously thinner than the known web material 7 described previously, which on average are about 2.5 to 3.5 mm thick.
- a layer 15 of elastically deformable spongy polymer material 16, in particular polyurethane foam is placed in contact with bottom cover 5; which material 16 is precompressed to compact adsorbent material 14 between retaining and filtering web material 7 and layer 15, and exert sufficient compression to ensure maximum compaction of adsorbent material 14 and prevent any relative movement of the granules .
- the height of layer 15, in the precompressed in-use condition, is less than distance D between the bottom end of partition wall 6 and bottom cover 5, so that part of bottom portion 13 of chamber 10 is filled with a continuous layer of material 14, and defines, with top compartments 11 and 12 of chamber 10, a substantially U- shaped air and fuel vapour path connecting compartments 8 and 9 through material 14.
- Canister 1 comprises a first fitting 20 extending through end wall 3 and retaining and filtering web material 7, and which comes out directly inside compartment 11 of chamber 10, is connected to the vehicle tank (not shown) by a pipe (not shown) , and defines the fuel vapour inlet of canister 1.
- end wall 3 are also formed a second fitting 21 connecting compartment 8 to the atmosphere; and a third wash fitting 22 communicating with compartment 9, and which is connected to the intake manifold of the engine (not shown) via a control valve (not shown) .
- Canister 1 is assembled by placing the blanks of retaining web material 7 on spacer pins 31, welding web material 7 to shoulders 18, filling chamber 10 with adsorbent material 14, placing layer 15 of spongy material and closing chamber 10 with cover 5.
- Retaining web material 7 preferably provides for a 100% filtration power of less than 25 ⁇ m, and in particular of 15 ⁇ m, as compared with 40 ⁇ m to 80 ⁇ m of known web materials of the same section and made of polyester or polyamide, in particular aromatic polyamide
- the load loss, measured at 20 cm/s, of web material 7 according to the present invention is 0.18 mbar, i.e. much less than that of known web material, which ranges roughly between 0.30 and 0.35 mbar.
- the retaining and filtering web material employed provide for high air filtration capacity with no load loss, while at the same time providing the necessary rigidity to keep the granules of adsorbent material 14 compact, thus eliminating the drawbacks typically associated with known vapour accumulators .
- the retaining and filtering web material are thinner and have a longer working life.
- vapour accumulator as described herein without, however, departing from the scope of the present invention.
- different materials may be used for each of the two layers defining retaining web material 7.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP03772670A EP1552134B1 (en) | 2002-10-17 | 2003-10-16 | Temporary vehicle fuel vapour accumulator |
BR0314888-2A BR0314888A (en) | 2002-10-17 | 2003-10-16 | Temporary vehicle fuel vapor accumulator |
AU2003279561A AU2003279561A1 (en) | 2002-10-17 | 2003-10-16 | Temporary vehicle fuel vapour accumulator |
DE60304886T DE60304886T2 (en) | 2002-10-17 | 2003-10-16 | SHORT-TIME MEMORY FOR VEHICLE FUEL MUFFS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000906A ITTO20020906A1 (en) | 2002-10-17 | 2002-10-17 | TEMPORARY FUEL VAPOR ACCUMULATOR FOR A VEHICLE. |
ITTO2002A000906 | 2002-10-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004036024A1 true WO2004036024A1 (en) | 2004-04-29 |
Family
ID=32104801
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IT2003/000637 WO2004036024A1 (en) | 2002-10-17 | 2003-10-16 | Temporary vehicle fuel vapour accumulator |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1552134B1 (en) |
AT (1) | ATE324521T1 (en) |
AU (1) | AU2003279561A1 (en) |
BR (1) | BR0314888A (en) |
DE (1) | DE60304886T2 (en) |
ES (1) | ES2260667T3 (en) |
IT (1) | ITTO20020906A1 (en) |
WO (1) | WO2004036024A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120160218A1 (en) * | 2010-12-21 | 2012-06-28 | Audi Ag | Fuel system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5599384A (en) * | 1994-06-15 | 1997-02-04 | Tsuchiya Mfg. Co., Ltd. | Fuel vapor treatment device |
FR2744036A1 (en) * | 1996-01-26 | 1997-08-01 | Filtrauto | Adsorbent filter for removing fuel vapours from vehicle engines |
EP1113163A2 (en) * | 1999-12-28 | 2001-07-04 | Tennex Corporation | Fuel vapor treatment canister |
-
2002
- 2002-10-17 IT IT000906A patent/ITTO20020906A1/en unknown
-
2003
- 2003-10-16 BR BR0314888-2A patent/BR0314888A/en not_active IP Right Cessation
- 2003-10-16 DE DE60304886T patent/DE60304886T2/en not_active Expired - Fee Related
- 2003-10-16 AT AT03772670T patent/ATE324521T1/en not_active IP Right Cessation
- 2003-10-16 EP EP03772670A patent/EP1552134B1/en not_active Expired - Lifetime
- 2003-10-16 WO PCT/IT2003/000637 patent/WO2004036024A1/en not_active Application Discontinuation
- 2003-10-16 AU AU2003279561A patent/AU2003279561A1/en not_active Abandoned
- 2003-10-16 ES ES03772670T patent/ES2260667T3/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5599384A (en) * | 1994-06-15 | 1997-02-04 | Tsuchiya Mfg. Co., Ltd. | Fuel vapor treatment device |
FR2744036A1 (en) * | 1996-01-26 | 1997-08-01 | Filtrauto | Adsorbent filter for removing fuel vapours from vehicle engines |
EP1113163A2 (en) * | 1999-12-28 | 2001-07-04 | Tennex Corporation | Fuel vapor treatment canister |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20120160218A1 (en) * | 2010-12-21 | 2012-06-28 | Audi Ag | Fuel system |
US9752544B2 (en) * | 2010-12-21 | 2017-09-05 | Audi Ag | Fuel system |
Also Published As
Publication number | Publication date |
---|---|
BR0314888A (en) | 2005-08-02 |
DE60304886T2 (en) | 2006-10-12 |
ES2260667T3 (en) | 2006-11-01 |
EP1552134A1 (en) | 2005-07-13 |
AU2003279561A1 (en) | 2004-05-04 |
ITTO20020906A1 (en) | 2004-04-18 |
ATE324521T1 (en) | 2006-05-15 |
EP1552134B1 (en) | 2006-04-26 |
DE60304886D1 (en) | 2006-06-01 |
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