EP1553283A1 - Vorrichtung zur Behandlung von verdampftem Kraftstoff - Google Patents

Vorrichtung zur Behandlung von verdampftem Kraftstoff Download PDF

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Publication number
EP1553283A1
EP1553283A1 EP04100042A EP04100042A EP1553283A1 EP 1553283 A1 EP1553283 A1 EP 1553283A1 EP 04100042 A EP04100042 A EP 04100042A EP 04100042 A EP04100042 A EP 04100042A EP 1553283 A1 EP1553283 A1 EP 1553283A1
Authority
EP
European Patent Office
Prior art keywords
canister
processing device
resilient body
evaporated fuel
fuel processing
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.)
Withdrawn
Application number
EP04100042A
Other languages
English (en)
French (fr)
Inventor
Remi B. Loevenbruck
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.)
Delphi Technologies Inc
Original Assignee
Delphi Technologies Inc
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 Delphi Technologies Inc filed Critical Delphi Technologies Inc
Priority to EP04100042A priority Critical patent/EP1553283A1/de
Publication of EP1553283A1 publication Critical patent/EP1553283A1/de
Withdrawn legal-status Critical Current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 generally relates to an evaporated fuel processing device, in particular for an internal combustion engine of an automotive vehicle, comprising an evaporative canister.
  • canisters generally also comprise volume compensators including e.g. a compacting plate and springs to keep a sufficient pressure on the adsorbent by axially sliding inside the canister.
  • the shape and the size of the cross section of such a compacting plate will be determined by the inner cross section of the canister case, whereas at least part of the shape of the canister will be determined by the fact that this compacting plate must slide inside the canister case, generally along a longitudinal axis.
  • Such a configuration therefore severely reduces the freedom in designing the canister case, which is nevertheless an important aspect for an optimum integration e.g. in the engine compartment of a car.
  • the canister case should present a cover portion with a sufficient size and an appropriate shape to permit the placing of the volume compensator, thereby further reducing the freedom of shape of the canister.
  • volume compensators are composed of multiple parts giving rise to higher manufacturing costs. Moreover, these parts must be assembled, at least partially during the manufacture of the canister itself, which leads to additional assembly costs.
  • the object of the present invention is hence to provide an improved evaporated fuel processing device which provides for an efficient volume compensation while allowing significantly greater freedom in designing the shape of such a device.
  • an evaporated fuel processing device comprising a canister including a canister case accommodating an adsorbent material and a volume compensator means to keep said adsorbent material in a compact state.
  • said volume compensator means comprises at least one resilient body including one or more gas-filled cells and said at least one resilient body is arranged inside said canister case.
  • the adsorbent is therefore efficiently kept in a sufficiently compact state to ensure an optimal fuel vapour adsorption and desorption function.
  • a major advantage of a volume compensator means of the present invention is a considerably larger freedom in designing the shape of the canister case, because the flexible volume compensator means does not require specifically designed cover and body parts in order to accomplish its function.
  • the shape of the canister no longer depends on volume compensation considerations and therefore may be chosen to optimise the overall fuel adsorption capacity of the device and/or to best meet space constraints inside the engine compartment.
  • Another important advantage of such a device is an improved reliability over prior art solutions, because the volume compensation is done without interaction of a number of mechanical parts with narrow manufacturing tolerances and stringent assembly procedures.
  • volume compensator combining ease of manufacturability and lack of tedious assembly steps, and hence reduced manufacturing and assembly costs.
  • the resilient body is not limiting, in a preferred embodiment of the invention, the resilient body is a spheroid, i.e. having a roughly spherical shape.
  • a resilient spheroid presents several advantages, the most important being an optimal three-dimensional pressure development within the canister case to allow for a sufficiently uniform compacting of the adsorbent.
  • a further advantage of this embodiment is that the risk of jamming inside the canister during the insertion of the volume compensator is reduced, especially if more than one resilient body is being used to compensate for thermal volume variations.
  • the resilient body comprises an elastomeric outer envelope defining a gas-filled chamber, such as an elastomeric ball.
  • the volume compensation is done by only one elastomeric ball.
  • the resilient body comprises an elastomeric foam material, i.e. it is made of a large number of smaller gas-filled cells. While the presence of inner partitioning cell walls may reduce expansion and contracting capability of the resilient body, as already mentioned, these walls, on the other hand, increase the intrinsic three-dimensional stability of the resilient structure.
  • Volume compensators made of elastomeric foam material are also inexpensive and easy to handle.
  • the fuel adsorbing efficiency and/or the manufacturing process of the device may be further improved by varying the size and/or the number of resilient bodies used.
  • its position inside the canister is preferably chosen in order to uniformly distribute the pressure within the adsorbent.
  • the volume compensation body is therefore advantageously centrally arranged inside the canister case.
  • said resilient body is incorporated inside said adsorbent material, i.e. each resilient body is substantially surrounded by adsorbent particles, the main advantage being an increased ease of handling allowing the filling of the device either by its bottom or its top side.
  • such a resilient body may also be arranged between the inner walls of said canister case and said adsorbent material.
  • a resilient body may also be arranged between the inner walls of said canister case and said adsorbent material.
  • wall supported bodies e.g. attached to the inner side of a cover part
  • resilient bodies e.g. a resilient ball or a plurality of foam beads, incorporated inside said adsorbent.
  • the device further comprises supporting means to maintain said at least one resilient body in a predefined position inside the adsorbent chamber.
  • This arrangement is of particular interest in the case of one or a small number of larger compensation bodies to control the position of each compensator within the canister case and thereby to optimise the path taken by the fuel vapours during adsorption and desorption cycles.
  • Fig. 2 represents an embodiment of an evaporated fuel processing device of the invention, in which the canister case (1) is closed with a cover (2).
  • a resilient ball (7) whose elastomeric envelope encloses a gas-filled core (8).
  • the correct position of the resilient ball (7) inside the canister is ensured using supporting pins or ribs (9), which extend from the inner walls of the canister case.
  • the expansion and contraction of the ball (7) due to thermal variations keeps the adsorbent in a sufficiently compact state for an optimum operation.
  • the cover (2) comprising a foam layer (11) and ribs (10) is placed on the canister case (1).
  • the foam layer (11) supported by the ribs (10) are not only useful to compensate for variations in the filling height with adsorbent material, but also to pressurize the gas inside the resilient body during assembly of the device, thereby further enhancing its compacting effect on the adsorbent.

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)
EP04100042A 2004-01-08 2004-01-08 Vorrichtung zur Behandlung von verdampftem Kraftstoff Withdrawn EP1553283A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP04100042A EP1553283A1 (de) 2004-01-08 2004-01-08 Vorrichtung zur Behandlung von verdampftem Kraftstoff

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04100042A EP1553283A1 (de) 2004-01-08 2004-01-08 Vorrichtung zur Behandlung von verdampftem Kraftstoff

Publications (1)

Publication Number Publication Date
EP1553283A1 true EP1553283A1 (de) 2005-07-13

Family

ID=34585990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04100042A Withdrawn EP1553283A1 (de) 2004-01-08 2004-01-08 Vorrichtung zur Behandlung von verdampftem Kraftstoff

Country Status (1)

Country Link
EP (1) EP1553283A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2602948C2 (ru) * 2011-08-15 2016-11-20 Форд Глобал Текнолоджис, ЛЛК Бачок для топливных паров (варианты)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758255A (en) * 1986-09-22 1988-07-19 Aisan Kogyo Kabushiki Kaisha Canister for adsorbing fuel vapors
US5002596A (en) * 1990-05-21 1991-03-26 Chrysler Corporation Fuel vapor canister
US5348929A (en) * 1990-04-28 1994-09-20 Toyoda Gosei Co., Ltd. Fuel absorbent
FR2744036A1 (fr) * 1996-01-26 1997-08-01 Filtrauto Filtre adsorbeur pour vapeurs de carburant
FR2752750A1 (fr) * 1996-09-03 1998-03-06 Renault Absorbeur de vapeur d'hydrocarbure a cloison permeable

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4758255A (en) * 1986-09-22 1988-07-19 Aisan Kogyo Kabushiki Kaisha Canister for adsorbing fuel vapors
US5348929A (en) * 1990-04-28 1994-09-20 Toyoda Gosei Co., Ltd. Fuel absorbent
US5002596A (en) * 1990-05-21 1991-03-26 Chrysler Corporation Fuel vapor canister
FR2744036A1 (fr) * 1996-01-26 1997-08-01 Filtrauto Filtre adsorbeur pour vapeurs de carburant
FR2752750A1 (fr) * 1996-09-03 1998-03-06 Renault Absorbeur de vapeur d'hydrocarbure a cloison permeable

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2602948C2 (ru) * 2011-08-15 2016-11-20 Форд Глобал Текнолоджис, ЛЛК Бачок для топливных паров (варианты)

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