EP0631043B1 - Filtre de charbon actif pour dégazage de réservoir de carburant - Google Patents

Filtre de charbon actif pour dégazage de réservoir de carburant Download PDF

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Publication number
EP0631043B1
EP0631043B1 EP94104159A EP94104159A EP0631043B1 EP 0631043 B1 EP0631043 B1 EP 0631043B1 EP 94104159 A EP94104159 A EP 94104159A EP 94104159 A EP94104159 A EP 94104159A EP 0631043 B1 EP0631043 B1 EP 0631043B1
Authority
EP
European Patent Office
Prior art keywords
activated carbon
housing
connection
carbon filter
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
EP94104159A
Other languages
German (de)
English (en)
Other versions
EP0631043A1 (fr
Inventor
Heinz Andress
Karl Ernst Hummel
Arthur Klotz
Thomas Schermuly
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.)
Mann and Hummel GmbH
Original Assignee
Filterwerk Mann and Hummel GmbH
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 Filterwerk Mann and Hummel GmbH filed Critical Filterwerk Mann and Hummel GmbH
Publication of EP0631043A1 publication Critical patent/EP0631043A1/fr
Application granted granted Critical
Publication of EP0631043B1 publication Critical patent/EP0631043B1/fr
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 invention relates to an activated carbon filter for fuel tank ventilation according to the preamble of the main claim.
  • Such activated carbon filters are known from practice. These generally have an activated carbon package in a housing made of plastic, the housing being connected via pipes to the fuel tank, the intake manifold of an internal combustion engine and the atmosphere.
  • an inner housing made of plastic is surrounded by an outer housing which is impermeable to fuel vapor.
  • This filter is very complex, since the outer housing cannot accommodate the connecting piece and therefore an additional cover has to be attached.
  • the outer housing must be placed sealingly over the inner housing so that the fuel vapor-permeable inner housing cannot emit harmful gases into the environment.
  • An activated carbon filter for fuel tank ventilation is known from EP-A 514 961. This consists of a housing receiving an activated carbon package, which is connected to the fuel line on the one hand via a first connection and on the other hand via a second connection to the intake manifold of an internal combustion engine and a third connection to the atmosphere.
  • Two walls are arranged in the housing, one wall having a passage and another wall separating two chambers which can be connected via a bypass valve.
  • a disadvantage of the known activated carbon filter is that bridges can form in the activated carbon bed, which allow the fuel vapors to escape into the atmosphere almost unhindered. This bridging cannot be prevented or only insignificantly prevented by the walls shown.
  • the invention has for its object to avoid the disadvantages mentioned and to create an activated carbon filter that is much easier to manufacture and has a high efficiency with regard to the degree of separation.
  • the main advantage of the invention is that the arrangement of at least two intersecting partitions creates at least four filter chambers through which the fuel vapors flow in succession and thus a substantial improvement in the adsorption of the fuel vapor is achieved.
  • further walls which of course allows the number of filter chambers to be increased as desired.
  • this arrangement in particular has considerable advantages for filters which have a flat design and are installed essentially horizontally. With this filter, no springs are required to pretension the activated carbon package, since a bypass or short circuit caused by the deposition of the activated carbon is not possible.
  • An advantageous development of the invention provides for the partition walls to be designed such that the fuel vapors flow through all the chambers one after the other in a forced manner. Because of Because of the relatively large passage cross section of a respective chamber, a slow flow velocity is achieved and thus a high adsorption is ensured.
  • the separation between the first and the last chamber that is to say between the inlet chamber and the outlet chamber, is completely sealed, so that gas exchange between these two chambers is not possible under any operating condition.
  • a further embodiment of the invention is concerned with the respective front cover of the activated carbon.
  • a so-called filter foam is advantageously provided, which covers the activated carbon on one or both sides and generates a certain pre-tension due to the elasticity.
  • a further embodiment of the invention provides channels for guiding the fuel vapors in one or both end covers of the housing. These channels are designed at the same time so that they increase the stability of the covers and enable the function of supporting the activated carbon or the filter foam.
  • connections for the connection to the intake manifold of an internal combustion engine and the connection to the fuel tank can be clipped or snapped onto the housing or can also be welded to the housing and molded on.
  • the cover of the housing is also vibration or mirror welded to the housing.
  • FIG. 1 An activated carbon filter is shown in a schematic representation in FIG. 1. It consists of a housing 10 which has a first connection 11. This is connected to the intake pipe of an internal combustion engine. Furthermore, a second connection 12 is provided, which is connected to the fuel tank and through which the fuel vapors are supplied. A connection 13 is also provided. This is related to the atmosphere.
  • first partition 14 in the housing of the activated carbon filter. This is with the bottom 15 of the housing 10 connected.
  • the further partition 16 is connected between the chamber 17 and the chamber 18 with the lid 21 and in the region between the chambers 19, 20 with both the lid 21 and the bottom 15, so that a complete separation between chamber 19 and chamber 20th is guaranteed.
  • the chambers 17 to 20 are each filled with an activated carbon package 22, 23, 24, 25, the activated carbon being provided on the end faces with filter fleece layers which prevent activated carbon from escaping.
  • the gasoline or fuel vapors flowing in via the tank connection reach the activated carbon package 23, as shown in section CC, flow upwards and reach via a connection to the activated carbon package 22, flow downwards, then reach the activated carbon package 24 and flow through it and subsequently the activated carbon package 25.
  • the fuel vapors are thus passed through all four chambers in succession.
  • the hydrocarbon compounds are completely absorbed, only the remaining fresh air can flow into the atmosphere.
  • FIG. 2 shows a section through an activated carbon filter in a more detailed structure.
  • This activated carbon filter has a housing 26 on which a cover 27 is arranged. Both the housing and cover are made of a thermoplastic. This makes it possible to connect the cover to the housing, for example using vibration welding.
  • a partition 28 is integrated in the housing.
  • a further partition wall 29 running at right angles to the partition wall 28 is provided.
  • the activated carbon 31 is only shown in chamber 30.
  • the activated carbon is delimited in the lower area by a filter fleece mat 32 with respect to the channels 33.
  • a filter foam 34 is arranged in the upper region.
  • the filter fleece mat 34 rests on the arc-shaped spacer of the cover 27.
  • 36 channels 35 are provided between the arc-shaped spacers for the flow of the fuel vapors.
  • the entire activated carbon filter can be attached to a receptacle via a connecting flange 37, 38.
  • FIGS. 3a and 3b A further activated carbon filter is shown in FIGS. 3a and 3b.
  • a filter is shown in a side view in FIG. 3a.
  • a housing 39 is provided with a cover 40, the cover and housing here also being made of a thermoplastic and welded to one another.
  • the cover has channels 41 through which the fuel vapors are conducted from one chamber to the next chamber.
  • connections 42 for atmosphere, tank and suction pipe.
  • these connections can be fastened to an opening of the housing 39 by means of a rotary welding process or mirror welding. Direct injection of the connections is also possible.
  • FIG. 3 c shows in a first variant a connection 46 for supplying the fuel vapors, which is clipped into the housing 39.
  • This connection 46 is provided with an immersion tube 47 and has a filter element 48 which prevents activated carbon from escaping.
  • the connection 46 is sealed to the housing 39 by means of an O-ring seal 49.
  • a connection 50 for the supply of fresh air is located on the right-hand chamber of the activated carbon filter.
  • connection 46 is provided with a cover element 51, which is welded to the housing 39 by means of vibration welding.
  • connection 50 for the supply of fresh air also has a cover element 52. This is also connected to the housing 39 by means of vibration welding.
  • FIG. 3e shows a complete cover 53, which contains all the connections and is fastened to the housing 39 in one work step by means of vibration welding.
  • the activated carbon 42, 43 within the housing 39 is covered in the lower area with a filter fleece 44 and in the upper area with a filter foam 45.
  • the filter foam 45 has an elasticity which creates a certain pre-tension on the activated carbon and thus prevents a relative movement of the activated carbon in the event of shocks or vibrations.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Separation Of Gases By Adsorption (AREA)
  • Supplying Secondary Fuel Or The Like To Fuel, Air Or Fuel-Air Mixtures (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Filtering Materials (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Filtration Of Liquid (AREA)
  • Water Treatment By Sorption (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Claims (10)

  1. Filtre à charbon actif pour la ventilation d'un réservoir de carburant comprenant un boîtier (10) recevant une garniture de charbon actif,
    - ce boîtier étant mis en communication d'un côté par un premier ajutage (12) avec le réservoir de carburant et par l'autre côté, par un second ajutage (11) à la tubulure d'aspiration, notamment d'un moteur à combustion interne et par un troisième ajutage (13) à l'atmosphère,
    - le boîtier (10) comportant une première cloison de séparation (14) entre l'ajutage (13) mis à l'atmosphère et l'ajutage (12) pour le réservoir de carburant, et,
    - dans le boîtier (10), il y a au moins une autre cloison de séparation qui forme au moins une autre chambre et au moins une chambre (17) est remplie de charbon actif (22),
    caractérisé en ce que
    les cloisons (14, 16) se croisent et créent au moins quatre chambres à filtre (17, 18, 19, 20) traversées successivement par les vapeurs de carbone qui sont adsorbées par le charbon actif.
  2. Filtre à charbon actif selon la revendication 1,
    caractérisé en ce qu'
    au moins une chambre (20) reçoit d'autres composants mécaniques comme par exemple des soupapes.
  3. Filtre à charbon actif selon la revendication 1 ou 2,
    caractérisé en ce qu'
    entre la chambre (19) avec l'ajutage de réservoir (12) et la chambre avec l'ajutage (13) de mise à l'atmosphère, il est prévu une cloison sans communication.
  4. Filtre à charbon actif selon l'une des revendications précédentes,
    caractérisé en ce que
    le charbon actif (22-25) dans la chambre respective (17-20) comporte à l'entrée et à la sortie des gaz en circulation, une mousse filtrante (34) en feutre ou en non-tissé retenant efficacement le charbon actif (22-25).
  5. Filtre à charbon actif selon l'une des revendications précédentes,
    caractérisé en ce que
    le couvercle ou le fond (15) du boîtier (10) est muni de canaux (33) permettant un passage des vapeurs de carburant et conduisant ces vapeurs vers la chambre suivante.
  6. Filtre à charbon actif selon l'une des revendications précédentes,
    caractérisé en ce que
    les ajutages (11, 12, 13) sont accrochés ou enclipsés dans le boîtier (10).
  7. Filtre à charbon actif selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    les branchements (11, 12, 13) et/ou le couvercle du boîtier sont en matière plastique et sont soudés au boîtier (10).
  8. Filtre à charbon actif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    la mousse de filtre (34), le feutre ou le non-tissé sont reliés sur le couvercle ou à un organe de support par collage ou fusion du couvercle ou de l'organe de support à celui-ci.
  9. Filtre à charbon actif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les différentes chambres (17-20) sont chargées de charbon actif (22-25) à structure de pores différente.
  10. Filtre à charbon actif selon l'une quelconque des revendications précédentes,
    caractérisé en ce que
    les chambres (17-20) ont des sections ou des longueurs différentes.
EP94104159A 1993-06-19 1994-03-17 Filtre de charbon actif pour dégazage de réservoir de carburant Expired - Lifetime EP0631043B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4320384A DE4320384A1 (de) 1993-06-19 1993-06-19 Aktivkohlefilter zur Kraftstofftankentlüftung
DE4320384 1993-06-19

Publications (2)

Publication Number Publication Date
EP0631043A1 EP0631043A1 (fr) 1994-12-28
EP0631043B1 true EP0631043B1 (fr) 1997-09-17

Family

ID=6490727

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94104159A Expired - Lifetime EP0631043B1 (fr) 1993-06-19 1994-03-17 Filtre de charbon actif pour dégazage de réservoir de carburant

Country Status (13)

Country Link
US (1) US5501723A (fr)
EP (1) EP0631043B1 (fr)
JP (1) JP2846241B2 (fr)
CN (1) CN1035208C (fr)
AT (1) ATE158381T1 (fr)
BR (1) BR9401783A (fr)
CA (1) CA2125592C (fr)
CZ (1) CZ286783B6 (fr)
DE (2) DE4320384A1 (fr)
ES (1) ES2109532T3 (fr)
PL (1) PL173386B1 (fr)
SI (1) SI9400243A (fr)
ZA (1) ZA944036B (fr)

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WO1997033765A1 (fr) * 1996-03-13 1997-09-18 Filterwerk Mann+Hummel Gmbh Filtre d'adsorption variable
JP3748635B2 (ja) * 1996-09-20 2006-02-22 アルプス電気株式会社 通信装置
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DE102016208787A1 (de) 2016-05-20 2017-11-23 Kautex Textron Gmbh & Co. Kg Kraftstoffdampffilter für eine Tankentlüftungseinrichtung eines Kraftfahrzeugs mit verbesserten Beladeeigenschaften

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Also Published As

Publication number Publication date
EP0631043A1 (fr) 1994-12-28
CZ94894A3 (en) 1995-01-18
DE59404069D1 (de) 1997-10-23
DE4320384A1 (de) 1994-12-22
ES2109532T3 (es) 1998-01-16
CN1098369A (zh) 1995-02-08
ZA944036B (en) 1995-02-02
JP2846241B2 (ja) 1999-01-13
ATE158381T1 (de) 1997-10-15
CA2125592C (fr) 2000-11-07
PL303886A1 (en) 1994-12-27
BR9401783A (pt) 1995-01-17
PL173386B1 (pl) 1998-02-27
CN1035208C (zh) 1997-06-18
SI9400243A (en) 1995-02-28
CA2125592A1 (fr) 1994-12-20
CZ286783B6 (en) 2000-07-12
US5501723A (en) 1996-03-26
JPH0771337A (ja) 1995-03-14

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