WO2010000687A2 - Filtre à carburant - Google Patents

Filtre à carburant Download PDF

Info

Publication number
WO2010000687A2
WO2010000687A2 PCT/EP2009/058094 EP2009058094W WO2010000687A2 WO 2010000687 A2 WO2010000687 A2 WO 2010000687A2 EP 2009058094 W EP2009058094 W EP 2009058094W WO 2010000687 A2 WO2010000687 A2 WO 2010000687A2
Authority
WO
WIPO (PCT)
Prior art keywords
filter
container
fuel
volume
cover
Prior art date
Application number
PCT/EP2009/058094
Other languages
English (en)
Other versions
WO2010000687A3 (fr
Inventor
Giorgio Girondi
Original Assignee
Ufi Filters S.P.A.
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 Ufi Filters S.P.A. filed Critical Ufi Filters S.P.A.
Publication of WO2010000687A2 publication Critical patent/WO2010000687A2/fr
Publication of WO2010000687A3 publication Critical patent/WO2010000687A3/fr

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
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines
    • F02M37/22—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system
    • F02M37/32—Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines, e.g. arrangements in the feeding system characterised by filters or filter arrangements
    • F02M37/42—Installation or removal of filters

Definitions

  • the present invention relates to a fuel filter intended for use with internal combustion engines, for example Diesel engines.
  • a filter comprises an external casing equipped with a fuel inlet and fuel outlet and at least one filter cartridge serving to divide the internal volume of the casing into at least two separate compartments, a first compartment connected to the fuel inlet and a second compartment connected to the fuel outlet, such that any impurities in the fuel passing through are retained.
  • the external casing normally comprises a beaker-shaped container and an openable cover which hermetically closes the container thanks to the interposing of at least one sealing element which may be lodged in a relative seating in the container or cover.
  • the filter cartridge normally comprises a cylindrical screen of filtering material, for example a depth-type screen or a pleated-type screen of cellulose based material, with the screen constrained between two coaxial support plates.
  • the filter cartridge is installed inside the casing in such a way that it can be removed from the filter after opening the cover. This permits easy replacement of the filter cartridge when the filter screen is completely clogged, restoring the efficiency of the filter without the need to replace the casing.
  • An aim of the present invention is to obviate the problem of degeneration of sealing elements by providing a fuel filter with sealing elements that are more easily and rapidly replaced, and in which replacement of the sealing elements cannot be forgotten or neglected during the routine maintenance of the filter.
  • the invention provides a fuel filter of the type described in the preamble, comprising at least one filter cartridge removably installed inside a closed casing in such a way that it subdivides the internal volume of the casing into a first compartment communicating with an inlet for the fuel to be filtered and a second compartment communicating with an outlet for the filtered fuel.
  • the casing genehcally comprises a container and an openable cover serving to hermetically close the container by means of the presence of sealing elements constrainedly mounted to the filter cartridge in such a way that they are demounted from the filter together with the filter cartridge.
  • the cover and the container are conformed such as to define a housing volume of at least a portion of the sealing elements in an as-yet loose arrangement.
  • the axial dimension of the volume is reduced when the cover is coupled to the container to axially compress the sealing elements, which are then crushed into the volume between the container and the cover.
  • the volume comprises a seating which is entirely afforded in the cover, and a surface of the container facing the seating.
  • the volume comprises two seatings, facing and conjoined, afforded partly in the cover and partly in the container, or alternatively a seating afforded in the container and a surface of the cover facing the seating.
  • the presence of a volume for housing a perimeter portion of the sealing elements also simplifies the action of extraction of the screen from the container as this extraction is done without any dragging of the sealing elements against the container and/or the cover, thus limiting a possible ouflowing of the fuel and the danger of the operator's dirtying his hands while the screen is extracted to be replaced.
  • a further advantage consists in the fact that the volume comprises a seating which not only has the function of housing the sealing elements but also functions as a guide element for a correct positioning of the screen internally of the container.
  • figure 1 is a cross-section of a fuel filter in a first embodiment of the invention. Best Mode for Carrying Out the Invention
  • Figure 1 illustrates a filter 1 for Diesel fuel, comprising an external casing 2, the internal volume of which is sub-divided by a filter cartridge 3 into two separate compartments, with a first compartment 4 connected to an inlet channel 40 for the Diesel fuel to be filtered, and a second compartment 5 connected to an outlet channel 50 for the filtered Diesel fuel.
  • the external casing 2 comprises a container 20 in the form of a cylindrical cup with a lip formed as a flat circular externally-projecting edge 21 , with the container 20 closed above with a disc-shaped slim openable cover 22 to which both the inlet channel 40 and the outlet channel 50 are fixed, respectively in a central and a peripheral position.
  • the openable cover 22 has a flat circular edge which rests on the edge 21 of the container 20, where it is fixed in position by a plurality of screws 24.
  • a volume is defined between the openable cover 22, which volume will house at least a portion of the sealing elements 6 for sealing the filter 1.
  • edge 23 is connected to the central portion of the cover 22 by a raised step 25, which forms a narrow peripheral groove
  • the filter cartridge 3 comprises a filter screen 30 of substantially cylindrical shape, for example a depth-type screen or a cellulose-type screen, which is transited by a flow of Diesel fuel passing from the first compartment 4 to the second compartment 5 such as to separate and retain impurities contained in the Diesel fuel.
  • the filter screen 30 is inserted onto a central support element 31 and is constrained between two coaxial support plates, a lower plate 32 being completely closed and an upper plate 33 being provided with a central hollow sleeve 34.
  • the hollow sleeve 34 sealingly inserts onto an internal portion of the inlet channel 40 with an interposing of an annular sealing element 35.
  • Projecting from the lip of the sleeve 34 is a coaxial disc 36 exhibiting a number of through-holes 37 and with a flat annular sealing element 6 fixed around its outer edge.
  • the coaxial disc 36 also supports the annular sealing element 35.
  • the annular sealing element 35 can be supported in a suitable seating of the inlet channel 40.
  • the coaxial disc 36 is made in a single piece with the upper plate 33, but for technological reasons it could be formed as a separate item and subsequently joined to the sleeve 34 by mechanical interlocking, welding, adhesives, or any other fixing system.
  • the flat annular sealing element 6 is generally made of an elastic material, for example rubber, and exhibits a rectangular transverse cross-section with a groove on the internal sidewall which engages with a flat shelf projecting from the peripheral edge of the disc 36 and to which it may be fixed by mechanical interlocking or possibly by other systems, for example with adhesives.
  • the flat annular sealing element 6 is destined to be contained inside the volume between the cover and the container; in particular, at least a portion of the sealing element 6 is housed in the perimeter groove or seating 26 of the casing 2, where it is compressed between the facing surfaces of the raised step 25 of the cover 22 and the flat edge 21 of the container 20 in such a way as to ensure a hermetic sealing of the casing 2.
  • Two series of serrations are formed on the facing surfaces of the raised step 25 and the flat edge 21 , which serrations have the effect of more solidly compressing the sealing element 6.
  • the Diesel fuel to be filtered enters the first compartment 4 through the inlet channel 40, before passing through the filter screen 30 which blocks impurities; the fuel then enters the second compartment 5 before exiting definitively from the casing 2 through the holes 37 in the disc 36 and finally through the outlet channel 50.
  • the flat annular sealing element 6 prevents any leakage of Diesel fuel between the cylindrical container 20 and the upper cover 22.
  • the filter cartridge 3 After extraction the filter cartridge 3 can be separated from the cover 22 and replaced with a new filter cartridge 3, which is then inserted into the cylindrical container 20 before re-fastening the upper cover 22. Thanks to the described configuration, the removal and replacement of the filter cartridge 3 leads to the simultaneous removal and replacement of the sealing element 6 and the sealing element 35, which can be advantageously supplied already fixed to the filter cartridge 3 as a single replacement part, thus guaranteeing full restoration of efficiency of the filter 1 in a single maintenance operation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtration Of Liquid (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Glass Compositions (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • High-Pressure Fuel Injection Pump Control (AREA)

Abstract

L'invention concerne un filtre à carburant qui comprend au moins une cartouche de filtre (3) installée amovible à l'intérieur d'une enveloppe fermée (2) et qui divise le volume interne de l'enveloppe fermée (2) en un premier compartiment (4) communiquant avec un orifice d'entrée (40) du carburant à filtrer, et un second compartiment (5) communiquant avec un orifice de sortie (50) destiné au carburant filtré. L'enveloppe fermée (2) comprend un contenant (20) et un couvercle (22) ouvrable servant à fermer hermétiquement le contenant (20) à l'aide d'éléments d'étanchéité fixés fermement à la cartouche de filtre (3), de sorte que lesdits éléments peuvent être retirés avec la cartouche de filtre (3).
PCT/EP2009/058094 2008-07-04 2009-06-29 Filtre à carburant WO2010000687A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRE2008A000063 2008-07-04
IT000063A ITRE20080063A1 (it) 2008-07-04 2008-07-04 Filtro per carburante

Publications (2)

Publication Number Publication Date
WO2010000687A2 true WO2010000687A2 (fr) 2010-01-07
WO2010000687A3 WO2010000687A3 (fr) 2010-07-15

Family

ID=40585518

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2009/058094 WO2010000687A2 (fr) 2008-07-04 2009-06-29 Filtre à carburant

Country Status (2)

Country Link
IT (1) ITRE20080063A1 (fr)
WO (1) WO2010000687A2 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9211438U1 (de) * 1992-08-26 1994-01-05 Bosch Gmbh Robert Filter zum Reinigen von Kraftstoff
EP0659997A1 (fr) * 1993-12-22 1995-06-28 Filtrauto Perfectionnements aux boîtiers de filtres à liquide pour moteurs
EP0702144A2 (fr) * 1994-09-13 1996-03-20 Robert Bosch Gmbh Elément de filtrage interchangeable et boîtier filtrant pour le montage de l'élément de filtrage interchangeable
WO1997022397A1 (fr) * 1995-12-20 1997-06-26 Baldwin Filters, Inc. Systeme de filtration avec cartouche de filtre ecologique
DE102006051406A1 (de) * 2006-10-27 2008-04-30 Mann + Hummel Gmbh Kraftstofffilter
EP1936179A2 (fr) * 2006-12-20 2008-06-25 Toyota Jidosha Kabushiki Kaisha Filtre de carburant

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9211438U1 (de) * 1992-08-26 1994-01-05 Bosch Gmbh Robert Filter zum Reinigen von Kraftstoff
EP0659997A1 (fr) * 1993-12-22 1995-06-28 Filtrauto Perfectionnements aux boîtiers de filtres à liquide pour moteurs
EP0702144A2 (fr) * 1994-09-13 1996-03-20 Robert Bosch Gmbh Elément de filtrage interchangeable et boîtier filtrant pour le montage de l'élément de filtrage interchangeable
WO1997022397A1 (fr) * 1995-12-20 1997-06-26 Baldwin Filters, Inc. Systeme de filtration avec cartouche de filtre ecologique
DE102006051406A1 (de) * 2006-10-27 2008-04-30 Mann + Hummel Gmbh Kraftstofffilter
EP1936179A2 (fr) * 2006-12-20 2008-06-25 Toyota Jidosha Kabushiki Kaisha Filtre de carburant

Also Published As

Publication number Publication date
WO2010000687A3 (fr) 2010-07-15
ITRE20080063A1 (it) 2010-01-05

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