EP0894191A1 - Dispositif destine a un systeme d'alimentation en carburant - Google Patents

Dispositif destine a un systeme d'alimentation en carburant

Info

Publication number
EP0894191A1
EP0894191A1 EP97951837A EP97951837A EP0894191A1 EP 0894191 A1 EP0894191 A1 EP 0894191A1 EP 97951837 A EP97951837 A EP 97951837A EP 97951837 A EP97951837 A EP 97951837A EP 0894191 A1 EP0894191 A1 EP 0894191A1
Authority
EP
European Patent Office
Prior art keywords
housing part
housing
area
fuel system
locking
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.)
Granted
Application number
EP97951837A
Other languages
German (de)
English (en)
Other versions
EP0894191B1 (fr
Inventor
Wolfgang BÜSER
Dietmar Schmieder
Willi Strohl
Dieter Issler
Jochen Rose
Alexander Brand
Rudolf Meidinger
Erich Eiler
Frantisek Buric
Jaroslav Moucka
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0894191A1 publication Critical patent/EP0894191A1/fr
Application granted granted Critical
Publication of EP0894191B1 publication Critical patent/EP0894191B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M37/04—Feeding by means of driven pumps
    • F02M37/08—Feeding by means of driven pumps electrically driven
    • F02M37/10—Feeding by means of driven pumps electrically driven submerged in fuel, e.g. in reservoir
    • 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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/46—Details, component parts or accessories not provided for in, or of interest apart from, the apparatus covered by groups F02M69/02 - F02M69/44
    • F02M69/54—Arrangement of fuel pressure regulators
    • 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
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/80—Fuel injection apparatus manufacture, repair or assembly
    • F02M2200/8023—Fuel injection apparatus manufacture, repair or assembly the assembly involving use of quick-acting mechanisms, e.g. clips
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/598—With repair, tapping, assembly, or disassembly means
    • Y10T137/599—Pressure regulating type valve
    • Y10T137/5994—Diaphragm type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/598—With repair, tapping, assembly, or disassembly means
    • Y10T137/6011—Assembling, disassembling, or removing cartridge type valve [e.g., insertable and removable as a unit, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7781—With separate connected fluid reactor surface
    • Y10T137/7835—Valve seating in direction of flow
    • Y10T137/7836—Flexible diaphragm or bellows reactor

Definitions

  • the invention relates to a device for a fuel system according to the preamble of claim 1.
  • Fuel storage container for example in the vicinity of a hot internal combustion engine, is arranged.
  • the limits of the permissible tolerances of the material used for the housing parts, the material used for the membrane, the dimensions of the housing parts, the dimensions of the membrane, the forces applied during the crimping, and the stamp shapes used for the crimping are just a few examples name, be set very closely, which leads to high production costs. Even the smallest exceedance of the narrow tolerance limits can lead to a malfunction, in particular to a leak. Signs of settling during use of the device can also lead to malfunction, in particular leakage.
  • the device according to the invention for a fuel system with the characterizing features of claim 1 has the advantage that the housing parts can be assembled without great effort and using relatively small, easily manageable forces.
  • Another advantage is that the limits of the tolerances for the materials of the housing parts and the membrane unit can be far apart without fear of the device becoming leaky.
  • the assembly of the housing parts can be done very easily, in particular without complex devices and machines, the assembly of the device can advantageously be set up at any desired point on a production line.
  • one of the housing parts is designed in such a way that, if one looks at the cross section of the housing part in the holding area, it is U-shaped, this has the advantage that a high stability of the housing can be achieved even with relatively thin wall thicknesses of the housing.
  • FIGS. 1 to 7 show different exemplary embodiments and details of differently designed devices for a fuel system with different imaging scales.
  • Fuel systems in particular an internal combustion engine, have a housing composed of several, preferably two, housing parts.
  • a membrane or membrane unit separating two spaces.
  • the membrane or membrane unit is held and sealed on its outer circumference.
  • the membrane is held and sealed or Membrane unit at the point at which two of the at least two housing parts of the housing are joined.
  • FIG. 1 shows a first, preferably selected, particularly advantageous exemplary embodiment.
  • the fuel storage container 2 has an opening 4 in its upper wall.
  • the opening 4 is closed with a cover made of plastic.
  • the cover is referred to below as base body 6.
  • the cover or the base body 6 is screwed to the upper wall of the fuel tank 2 with the aid of screws, not shown.
  • the base body 6 is made of plastic.
  • a pressure regulator 8 is firmly integrated in terms of function and form in the base body 6.
  • the pressure regulator 8 has a housing 10.
  • the housing 10 consists of a first housing part 11 and a second housing part 12.
  • the first housing part 11 is directed upwards in the selected exemplary embodiment, the first housing part 11 is often referred to as a lower part, and the second housing part 12 is often called the upper part.
  • the housing 10 is essentially rotationally symmetrical. An imaginary axis of rotation of the housing 10 receives the designation longitudinal axis A and is indicated in the drawing by a dash-dotted line.
  • the membrane unit 14 comprises a membrane 15, a first plate 16, a second plate 17 and a closing body 18.
  • the plates 16 and 17 are firmly attached in the central region of the membrane 15 the membrane 15 connected.
  • the membrane 15 is installed on its outer circumference between the first housing part 11 and the second housing part 12.
  • the first plate 16 holds the closing body 18, which is, for example, a flattened ball.
  • the membrane 15 consists of one or more, preferably two, layers of flexible plastic plates. There can be a fabric layer between the plastic plates. In particularly stored cases, if desired, the plates 16, 17 attached to the membrane 15 and the closing body 18 can be dispensed with, so that only the membrane 15 without the parts 16, 17, 18 is installed between the housing parts 11, 12 is.
  • the membrane 15 of the membrane unit 14 separates a first space 21 from a second space 22.
  • the first space 21 is located essentially within the first housing part 11, and the second space 22 is located essentially within the second housing part 12.
  • Inside the base body 6 there is an inlet channel 24 and a return channel 26.
  • the inlet channel 24 has an inlet side 24a and a further side 24b.
  • the first housing part 11 has a bottom region 11a on the front side with a central recess 27. Laterally offset, the bottom region 11a has a passage 28.
  • a connecting piece 29 protruding through the central recess 27 is formed on the base body 6.
  • a stop 30 is provided on an end of the connecting piece 29 facing the closing body 18 of the membrane unit 14.
  • the return channel 26 runs through the base body 6 to the stop 30, which faces the closing body 18 and is provided at the front end of the connecting piece 29.
  • the stop 30 provided on the base body 6 serves as a valve seat for the closing body 18.
  • the inlet side 24a of the inlet channel 24 is connected, for example, to a fuel pump which is provided in the fuel tank 2 and is not shown for the sake of clarity. Fuel delivered by the fuel pump passes through the inlet side 24a and from there through the inlet channel 24 to the further side 24b and then, for example, to injection valves (not shown). The fuel also passes through the inlet channel 24 into the first space 21 through the passage 28. If the pressure in the first space 21 is less than a certain opening pressure, the closing body 18 abuts the stop 30 and the first space 21 is opposite the return channel 26 completed.
  • the closing body 18 of the membrane unit 14 lifts from the stop 30, and excess fuel can flow out of the inlet channel 24, through the first space 21, through the gap between the stop 30 and the closing body 18 and then through the return line anal 26 back into the Kraf material storage container 2.
  • a closing force acts on the plate 17 and thus the
  • the closing force is generated by a closing spring 32.
  • a pressure prevailing in the second space 22 can be used to generate the closing force.
  • the device shown in FIG. 1 has a holding area 40 on the housing 10.
  • the part of the device where the holding area 40 is located is shown again in FIGS. 2a and 2b with a changed scale, and in FIG. 3 that is first housing part 11 shown separately omitting all other parts.
  • parts that are the same or have the same effect are provided with the same reference symbols. Unless otherwise stated or shown in the drawing, that which is mentioned and illustrated with reference to one of the figures also applies to the other exemplary embodiments. Unless otherwise stated in the explanations, the details of the various exemplary embodiments can be combined with one another.
  • FIG. 2A shows the device before the two housing parts 11, 12 are locked together in the holding area 40.
  • FIG. 2B shows the two housing parts 11, 12 after the two housing parts 11, 12 are locked together in the locking area 42 of the holding area 40.
  • the first housing part 11 has, in addition to the base region 11a with the central recess 27 (FIG. 3), a cylindrical region 11c, and next to it a region radially extending transversely to the longitudinal axis A of the housing 10, which is followed by a further cylinder region 11g.
  • the second housing part 12 has a cylindrical region 12c, next to it an essentially radially extending region 12e and an adjoining essentially cylindrical region 12g.
  • the area 12e is slightly conically inclined and forms a circumferential surface, like the outer surface of a truncated cone.
  • the area 12g forms a circumferential outer collar of the housing part 12.
  • the clamping area 46 (FIGS. 2a, 2b) is essentially formed by a clamping point 46a on the housing part 11 and a clamping point 46b on the housing part 12.
  • the clamping point 46a is provided on the radially extending area III on the side facing the area 12e.
  • the clamping point 46b is located in the region 12e on the side facing the radially extending region III.
  • the first housing part 11 there are several U-shaped recesses 48 distributed all around the circumference (FIG. 3).
  • the cutouts 48 form on the housing part 11 a plurality of tabs 50 projecting slightly radially inward.
  • the tabs 50 each have a slightly radially inwardly projecting end facing the bottom region 11a.
  • This end face end of the tabs 50 forms a detent 42a belonging to the detent region 42 and provided on the first housing part 11.
  • the second housing part 12 is U-shaped in the holding area 40. If one looks at FIGS.
  • the cylindrical region 12g of the housing part 12 has a peripheral end facing away from the region 12e, which forms the detent 42b (FIGS. 2a, 2b) belonging to the detent region 42.
  • the housing parts 11, 12 are assembled by cursing them and then pushing them together.
  • the longitudinal axis A is also the direction for assembly.
  • the membrane unit 14 is placed on the radially extending area III of the housing part 11.
  • To the device can be rotated by 180 ° with respect to the position shown.
  • the housing part 12 is inserted into the region 11g of the housing part 11.
  • the area III of the first housing part 11 and the area 12e of the second housing part 12 do not run parallel to one another, but are inclined relative to one another at an angle ⁇ (alpha).
  • the region 12e merges into the cylindrical region 12c, the region 12e has a circumferential region which projects furthest in the direction of the first housing part 11. Will the two
  • the angle ⁇ (alpha) is reduced, the elastic region 44 provided between the clamping region 46 and the latching region 42 being elastically deformed.
  • the angle ⁇ (alpha) is reduced until it is zero or close to zero, depending on the tolerance situation of the components to be installed together. Due to the elastic provided on the housing 10
  • Area 44 ensures that the membrane 15 between the clamping point 46a on the first housing part 11 and the clamping point 46b on the second housing part 12 is firmly and tightly clamped and also remains.
  • the membrane 15 remains firmly and tightly clamped even if it is used for a long time the device has any signs of settling. If there are any signs of settling, the angle ⁇ (alpha) increases at most. As a result of the elastic prestress in the elastic region 44, however, there is always sufficient prestress for firm and tight sealing
  • the locking point 42a on the tabs 50 of the first housing part 11 protrudes somewhat radially inwards (FIG. 3). If, during the assembly of the two housing parts 11, 12, the cylindrical region 12g of the second housing part 12 reaches the area of the tabs 50, then the latching points 42a on the first housing part 11 are pressed radially elastically outwards (FIG. 2a). During the
  • the second housing part 12 is pressed in the direction of the longitudinal axis A against the first housing part 11.
  • the elastic region 44 is elastically deformed until the locking point 42a on the tabs 50 radially afterwards via the locking point 42b on the second housing part 12 snaps inside.
  • the locking point 42a on the first housing part 11 latches with the locking point 42b on the second housing part 12, as a result of which the two housing parts 11, 12 are held securely and firmly together.
  • the elastic region 44 presses the locking point 42b against the locking point 42a, so that the
  • Connection between the two housing parts 11, 12 is secure and free of play.
  • FIG. 4a shows the holding area 40 before the two housing parts 11, 12 are firmly locked together
  • FIG. 4b shows the holding area 40 after the two housing parts 11, 12 have locked
  • FIG. 5 shows a section of the first housing part 11 below as a detail Omission of the other components of the device.
  • undercuts 52 protruding radially inwards are embossed.
  • the end of the undercuts 52 facing the area III is relatively sharp-edged, and the latching point 42a is located on the side of the undercuts 52 facing the area III.
  • FIG. 6 shows a further, preferably selected, advantageous exemplary embodiment.
  • the device forms with the base body 6, the housing
  • the base body 6, the housing 10, the membrane unit 14 and the stop 30 are the essential parts of a memory 55.
  • the accumulator 55 absorbs or releases a relatively large or relatively small amount of fuel when there are pressure changes in the inflow channel 24, the accumulator 55 is used only for smoothing sharp pressure pulsations in the inflow anal 24, or the accumulator 55 can store large amounts of fuel when the pressure increases record, which he then releases when the pressure drops, so that the memory 55 can work effectively as a fuel accumulator.
  • the base body 6 which is made of relatively soft material, preferably plastic, is injection-molded or cast onto the first housing part 11.
  • the pressure regulator 8 or the accumulator 55 can thus be easily integrated into a plastic body.
  • the diameter of the recess 27 is smaller than the diameter of the connector 29.
  • the base body 6 is, for example, a cover for closing the fuel tank 2, or the base body 6 is, for example, one in an engine compartment Motor vehicle built-in fuel distribution pipe, from which branch off several lines leading to injection valves.
  • FIG. 7 shows a further, preferably selected, particularly advantageous exemplary embodiment.
  • the first housing part 11, i. H. in the passage 28 provided on the side a first socket 61 and in the recess 27 a second socket 62 are soldered, welded or crimped in a known manner.
  • the inlet channel 24 runs through the first nozzle 61
  • the return channel 26 runs through the second nozzle 62.
  • the device forms one
  • Pressure regulator 65 for installation in a hose line.
  • the pressure regulator 65 (FIG. 7) is installed in a line.
  • one hose each is connected to the connection piece 61 and to the connection piece 62.
  • the holding area 40 can be designed as shown in FIGS. 1, 2a, 2b, 3, 4a, 4b, 5 and on the basis of this Figures in the present description is explained.
  • the advantage of the device designed according to the invention is that the two housing parts 11, 12 can be assembled with relatively small forces and the membrane unit 14 or the membrane 15 between the two housing parts 11, 12 is tight and tight, even in the case of longer ones Operating time. Because of the small force required for the assembly, no damage, in particular no damage to the base body 6 (FIGS. 1, 6) and the membrane 15, must be feared.
  • the first housing part 11 has an approximately Z-shaped shape in the holding region 40
  • the second housing part 12 has an approximately U-shaped shape.
  • the first housing parts 11 in the holding area 40 can also be U-shaped and, accordingly, the second housing parts 12 can be Z-shaped.
  • the elastic region 44 arises through elastic deformation of the second housing part 12.
  • the elastic region can also arise through elastic deformation of the first housing part 11, preferably of the region III. It is also possible to elastically deform both housing parts 11 and 12 between the latching area 42 and the clamping area 46, in order thereby to obtain the elastic area 44.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Diaphragms And Bellows (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

L'invention concerne un dispositif destiné à un système d'alimentation en carburant comprenant un carter (10) constitué d'au moins deux parties carter (11, 12) assemblées. Un élément membrane (14) est inséré de manière fixe et étanche entre les parties boîtier (11, 12). La zone de maintien (40) qui assemble de manière fixe et étanche les deux parties carter (11, 12) et l'élément membrane (14), possède une zone élastique (44), ce qui garantit la liaison sûre souhaitée par simple clipsage des deux parties carter (11, 12). Le dispositif est notamment destiné à réguler la pression d'un système d'alimentation en carburant.
EP97951837A 1997-02-13 1997-12-09 Dispositif dans un systeme d'alimentation en carburant Expired - Lifetime EP0894191B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19705405 1997-02-13
DE19705405A DE19705405A1 (de) 1997-02-13 1997-02-13 Vorrichtung für eine Kraftstoffanlage
PCT/DE1997/002862 WO1998036168A1 (fr) 1997-02-13 1997-12-09 Dispositif destine a un systeme d'alimentation en carburant

Publications (2)

Publication Number Publication Date
EP0894191A1 true EP0894191A1 (fr) 1999-02-03
EP0894191B1 EP0894191B1 (fr) 2003-03-26

Family

ID=7820060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97951837A Expired - Lifetime EP0894191B1 (fr) 1997-02-13 1997-12-09 Dispositif dans un systeme d'alimentation en carburant

Country Status (7)

Country Link
US (1) US6016831A (fr)
EP (1) EP0894191B1 (fr)
JP (1) JP4040109B2 (fr)
KR (1) KR20000064884A (fr)
BR (1) BR9709120A (fr)
DE (2) DE19705405A1 (fr)
WO (1) WO1998036168A1 (fr)

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DE19650783A1 (de) * 1996-12-06 1998-06-10 Bosch Gmbh Robert Vorrichtung für eine Kraftstoffanlage einer Brennkraftmaschine
US6422205B2 (en) * 2000-01-27 2002-07-23 Siemens Automotive Corporation Twist off pressure regulator connector assembly
EP1369581A1 (fr) * 2002-06-06 2003-12-10 Siemens VDO Automotive Corporation Régulateur de pression contenant une coupelle de ressort montée en force
EP1369582B1 (fr) 2002-06-06 2007-01-24 Siemens VDO Automotive Corporation Système à carburant comprenant un régulateur de pression à passage direct
US6886590B2 (en) * 2002-09-20 2005-05-03 Siemens Vdo Automative Corporation Seal assembly for fuel pressure regulator
US20040055645A1 (en) * 2002-09-25 2004-03-25 Siemens Vdo Automotive Corporation Flow-through pressure regulator including a housing with a press-fit closure member assembly
US7063104B2 (en) * 2002-09-25 2006-06-20 Siemens Vdo Automotive Corporation Flow-through pressure regulator including a closure member assembly integrated with a housing
US6834673B2 (en) * 2002-12-20 2004-12-28 Siemens Vdo Automotive Corporation Pump module with pressure regulator
US6942787B2 (en) * 2002-12-20 2005-09-13 Siemens Vdo Automotive Corporation Filter module with pressure regulator
JP2004353520A (ja) * 2003-05-28 2004-12-16 Mitsubishi Electric Corp 燃料噴射装置
US7040344B2 (en) * 2003-06-06 2006-05-09 Siemens Vdo Automotive Corporation Pressure regulator including a fixed valve ball and method of assembling the same
US7819132B2 (en) * 2004-11-24 2010-10-26 Continental Automotive Systems Us, Inc. Pressure regulator with ceramic valve element
KR100902449B1 (ko) * 2004-12-01 2009-06-11 콘티넨탈 오토모티브 시스템즈 유에스, 인코포레이티드 세라믹 밸브 부재를 갖는 압력 조절기
DE102004061811B4 (de) * 2004-12-22 2017-12-21 Robert Bosch Gmbh Drucksystem mit wenigstens zwei Druckkreisen
KR100717288B1 (ko) 2006-01-12 2007-05-15 인지컨트롤스 주식회사 차량의 연료시스템용 압력조절기
JP5002523B2 (ja) 2008-04-25 2012-08-15 日立オートモティブシステムズ株式会社 燃料の圧力脈動低減機構、及びそれを備えた内燃機関の高圧燃料供給ポンプ
FR3012849B1 (fr) * 2013-11-04 2018-06-01 Nobel Plastiques Dispositif amortisseur de pulsations.
JP5923549B2 (ja) * 2014-05-20 2016-05-24 日立オートモティブシステムズ株式会社 高圧燃料供給ポンプ、及び高圧燃料供給ポンプの製造方法

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Also Published As

Publication number Publication date
EP0894191B1 (fr) 2003-03-26
US6016831A (en) 2000-01-25
DE59709634D1 (de) 2003-04-30
BR9709120A (pt) 2000-05-09
JP4040109B2 (ja) 2008-01-30
KR20000064884A (ko) 2000-11-06
DE19705405A1 (de) 1998-08-20
WO1998036168A1 (fr) 1998-08-20
JP2000509463A (ja) 2000-07-25

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