EP1552134B1 - Kurzzeitspeicher für fahrzeugkraftstoffdämpfe - Google Patents

Kurzzeitspeicher für fahrzeugkraftstoffdämpfe Download PDF

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Publication number
EP1552134B1
EP1552134B1 EP03772670A EP03772670A EP1552134B1 EP 1552134 B1 EP1552134 B1 EP 1552134B1 EP 03772670 A EP03772670 A EP 03772670A EP 03772670 A EP03772670 A EP 03772670A EP 1552134 B1 EP1552134 B1 EP 1552134B1
Authority
EP
European Patent Office
Prior art keywords
accumulator
layer
retaining
filtering
chamber
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 - Lifetime
Application number
EP03772670A
Other languages
English (en)
French (fr)
Other versions
EP1552134A1 (de
Inventor
Pietro Di Biasi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dayco Fuel Management SpA
Original Assignee
Dayco Fuel Management SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dayco Fuel Management SpA filed Critical Dayco Fuel Management SpA
Publication of EP1552134A1 publication Critical patent/EP1552134A1/de
Application granted granted Critical
Publication of EP1552134B1 publication Critical patent/EP1552134B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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.
  • EP-A-1 113 163 and US-A-5 559 384 disclose fuel vapour accumulators according to the preamble of claim 1, in which the adsorbent material is retained between partitions formed by a perforated plate and a filtering, sheet-like material interposed between the plate and the adsorbing material.
  • Each partition is therefore constituted by two distinct components and is thus relatively costly and bulky. It is an object of the present invention to provide a temporary fuel vapour accumulator with improved retaining and filtering means that solve the problems of known retaining and filtering means as discussed above.
  • 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.
  • a retaining and filtering web material 7 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 filtering material described previously, which on average is about 2.5 to 3.5 mm thick.
  • 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 (or so-called aramide), felt as described above.
  • 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.

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)
  • Filtering Materials (AREA)
  • Laminated Bodies (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)

Claims (11)

  1. Kurzzeitspeicher für Fahrzeugkraftstoffdämpfe, umfassend ein Gehäuse (2), das eine Kammer (10) definiert, die ein Adsorbensmaterial (14) in Granalien; elastisches Mittel (15) zum Ausüben einer Kompression auf das Adsorbensmaterial (14); und Filter- und Haltemittel (7) zum Halten der Granalien innerhalb der Kammer enthält; dadurch gekennzeichnet, daß das Filter- und Haltemittel ein Mehrschichtgewebematerial (7) umfaßt, das eine erste Schicht (7a) zum Gewährleisten von Steifigkeit und eine zweite Schicht (7b) zum Gewährleisten von Filtrationsleistung umfaßt.
  2. Speicher nach Anspruch 1; dadurch gekennzeichnet, daß die Gesamtdicke des Gewebematerials (7) kleiner als 1,5 mm ist.
  3. Speicher nach Anspruch 2, dadurch gekennzeichnet, daß die erste Schicht (7a) und die zweite Schicht (7b) aus Polymermaterial hergestellt sind.
  4. Speicher nach Anspruch 3, dadurch gekennzeichnet, daß die erste Schicht (7a) aus Polycarbonat hergestellt ist.
  5. Speicher nach Anspruch 3 oder 4, dadurch gekennzeichnet, daß die zweite Schicht (7b) aus Vliesstoff hergestellt ist.
  6. Speicher nach Anspruch 5, dadurch gekennzeichnet, daß der Vliesstoff aus Polyester hergestellt ist.
  7. Speicher nach Anspruch 5, dadurch gekennzeichnet, daß der Vliesstoff aus Polyamid hergestellt ist.
  8. Speicher nach einem der vorangehenden Ansprüche, gekennzeichnet durch eine 100%ige Filtrationsleistung bei weniger als 20 µm.
  9. Speicher nach einem der vorangehenden Ansprüche, gekennzeichnet durch einen Lastverlust bei 20 cm/s von weniger als 0,25 mbar.
  10. Speicher nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß er elastisches Mittel (15) umfaßt, das eine Kompression auf das Adsorbensmaterial (14) ausübt, und welches durch eine Schicht eines schwammartigen Polymermaterials (16) definiert ist.
  11. Speicher nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Adsorbensmaterial (14) Aktivkohle ist.
EP03772670A 2002-10-17 2003-10-16 Kurzzeitspeicher für fahrzeugkraftstoffdämpfe Expired - Lifetime EP1552134B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITTO20020906 2002-10-17
IT000906A ITTO20020906A1 (it) 2002-10-17 2002-10-17 Accumulatore temporaneo di vapori di carburante per un autoveicolo.
PCT/IT2003/000637 WO2004036024A1 (en) 2002-10-17 2003-10-16 Temporary vehicle fuel vapour accumulator

Publications (2)

Publication Number Publication Date
EP1552134A1 EP1552134A1 (de) 2005-07-13
EP1552134B1 true EP1552134B1 (de) 2006-04-26

Family

ID=32104801

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03772670A Expired - Lifetime EP1552134B1 (de) 2002-10-17 2003-10-16 Kurzzeitspeicher für fahrzeugkraftstoffdämpfe

Country Status (8)

Country Link
EP (1) EP1552134B1 (de)
AT (1) ATE324521T1 (de)
AU (1) AU2003279561A1 (de)
BR (1) BR0314888A (de)
DE (1) DE60304886T2 (de)
ES (1) ES2260667T3 (de)
IT (1) ITTO20020906A1 (de)
WO (1) WO2004036024A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010055320A1 (de) * 2010-12-21 2012-06-21 Audi Ag Kraftstoffsystem

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3158266B2 (ja) * 1994-06-15 2001-04-23 株式会社テネックス 蒸気燃料の処理装置
FR2744036B1 (fr) * 1996-01-26 1998-05-15 Filtrauto Filtre adsorbeur pour vapeurs de carburant
JP3995881B2 (ja) * 1999-12-28 2007-10-24 株式会社マーレ フィルターシステムズ 蒸発燃料処理用のキャニスタ

Also Published As

Publication number Publication date
ES2260667T3 (es) 2006-11-01
WO2004036024A1 (en) 2004-04-29
AU2003279561A1 (en) 2004-05-04
EP1552134A1 (de) 2005-07-13
DE60304886T2 (de) 2006-10-12
BR0314888A (pt) 2005-08-02
ATE324521T1 (de) 2006-05-15
DE60304886D1 (de) 2006-06-01
ITTO20020906A1 (it) 2004-04-18

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