EP0625637A1 - Sammelleitung für eine Kraftstoffversorgungseinrichtung einer Brennkraftmaschine - Google Patents

Sammelleitung für eine Kraftstoffversorgungseinrichtung einer Brennkraftmaschine Download PDF

Info

Publication number
EP0625637A1
EP0625637A1 EP94107598A EP94107598A EP0625637A1 EP 0625637 A1 EP0625637 A1 EP 0625637A1 EP 94107598 A EP94107598 A EP 94107598A EP 94107598 A EP94107598 A EP 94107598A EP 0625637 A1 EP0625637 A1 EP 0625637A1
Authority
EP
European Patent Office
Prior art keywords
pipe
manifold
fact
central portion
axial end
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Withdrawn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
EP94107598A
Other languages
English (en)
French (fr)
Inventor
Maurizio Di Silvestro
Flavio Giovannini
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.)
Marelli Europe SpA
Original Assignee
Weber SRL
Magneti Marelli 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 Weber SRL, Magneti Marelli SpA filed Critical Weber SRL
Publication of EP0625637A1 publication Critical patent/EP0625637A1/de
Withdrawn legal-status Critical Current

Links

Images

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
    • 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
    • F02M69/462—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down
    • F02M69/465—Arrangement of fuel conduits, e.g. with valves for maintaining pressure in the pipes after the engine being shut-down of fuel rails

Definitions

  • the present invention relates to a manifold for an internal combustion engine fuel supply device, and in particular to a manifold for supplying pressurized fuel to a number of fuel metering and atomizing valves.
  • Manifolds of the above type normally comprise a first tubular body with a number of fittings for the valves; and a second tubular body housed coaxially inside the first body so as to define, between the first and second bodies, an annular conduit for supplying fuel to the fittings.
  • the first and second bodies are closed at a first axial end by a pressure regulator for maintaining the fuel pressure in the supply conduit below a given value, and at a second axial end by cap in which are formed a first duct between the fuel tank and the annular supply conduit, and a second duct between the second tubular body and the tank.
  • the second duct is formed in the first tubular body, at the pressure regulator seat.
  • Manifolds of the aforementioned type present several drawbacks, foremost of which is the fact that delivery and drainage of the fuel are defined at one axial end of the manifold, which, in addition to limiting assembly of the manifold, also results in greater length and in difficulties in hydraulically connecting the manifold and tank. Moreover, the sealing efficiency of the ducts formed in the cap or close to the pressure regulator is invariably reduced with time, thus resulting in fuel leakage.
  • a manifold for an internal combustion engine fuel supply device comprising a first tubular body with a number of fittings for fuel metering and atomizing valves; a second body housed inside said first body so as to define, with said first body, a conduit for supplying fuel to said fittings; a wall for closing a first axial end of said first body; and a pressure regulator mounted so as to close a second axial end of said first body and a first axial end of said second body; characterized by the fact that said second body comprises: a first pipe extending from a central portion of said first body to said wall; a fuel inlet for said first pipe, defined in said central portion of said first body; a hydraulic passage defined, close to said wall, between a first axial end of said first pipe and said conduit; a second pipe extending from said central portion of said first body to said pressure regulator, a portion of which closes a first axial end of said second pipe; and a fuel outlet for said second pipe, defined in
  • Manifold 1 comprises a tubular body 2 with a longitudinal axis A and a number of fittings 3 for known fuel metering and atomizing valves (not shown); and a second, externally cylindrical, body 4 housed substantially coaxially inside first body 2 so as to define, with first body 2, an annular conduit 5 defined by the respective inner and outer surfaces of bodies 2 and 4, and communicating with fittings 3 for supplying fuel to said valves.
  • Body 2 is closed at a first axial end by a member consisting of a known pressure regulator 7, and at a second axial end by a wall 6.
  • Pressure regulator 7 is mounted so as to close said first axial end of body 2 and a first axial end of body 4; provides for maintaining the fuel pressure in conduit 5 within a given range; and presents a spring by which it is locked to body 2.
  • Body 4 is formed in one piece, and presents: a solid central portion 11 in the central portion of body 2; a first pipe 12 extending from a first side of central portion 11 to wall 6 where a first axial end of pipe 12 is engaged internally by a cylindrical projection 9 extending from wall 6; an inlet 13 for pipe 12, defined between a second axial end of pipe 12 and central portion 11; a number of through slots 14 formed close to the first axial end of pipe 12, for hydraulically connecting pipe 12 and conduit 5; a second pipe 15 extending from a second side, opposite the first, of central portion 11 to pressure regulator 7, a component part of which closes a first axial end of pipe 15; and an outlet 16 for pipe 15, defined between a second axial end of pipe 15 and central portion 11.
  • Manifold 1 also comprises: tabs 29 along conduit 5, for centering pipes 12 and 15 in a given position in relation to body 2; a first hydraulic joint 17 having a first portion 19 fitted in sealed manner to inlet 13; and a second portion 20, outside body 2, for supporting one end of a pipe 18 from the tank; and a second hydraulic joint 21 having a first portion 23 fitted in sealed manner to outlet 16; and a second portion 24, outside body 2, for supporting one end of a pipe 22 to the tank.
  • the central portion of body 2 presents two threaded holes 25, one engaged by a central, externally threaded portion 26 of joint 17, and the other engaged by a central, externally threaded portion 27 of joint 21.
  • pipes 12 and 15 are coaxial with each other, and present substantially the same length and diameter; and the longitudinal axes B and C of joints 17 and 21 (and hence holes 25) are perpendicular to axis A and lie in the same plane.
  • Bodies 2 and 4 may be made of metal, preferably rheocast aluminium, or plastic; and body 2 is formed, preferably pressed, in one piece with wall 6.
  • Manifold 1 is assembled by first inserting body 4 inside body 2 so that the axial end of pipe 12 is engaged by projection 9, in which position, inlet 13 and outlet 16 are coaxial with holes 25. This is followed by assembly of pressure regulator 7 which closes and seals body 2, and a portion of which engages said first axial end of pipe 15. Finally, joints 17 and 21 are assembled by screwing respective central portions 26 and 27 inside holes 25.
  • the manifold according to the present invention provides for troublefree assembly inside the engine compartment, for reducing overall axial size, and for troublefree hydraulic connection of the manifold and pipes 18 and 22. Moreover, it provides for incorporating the fuel delivery and recirculating pipes in one body; and for simplifying manufacture of body 2 by eliminating the cap opposite pressure regulator 7. From the functional standpoint, the path along which the fuel is fed provides for flushing and so preventing deposits from accumulating in the portion of body 2 close to wall 6. Finally, the manifold according to the present invention provides for more reliable hydraulic sealing, thus greatly reducing the risk of fuel leakage.
  • pipes 12 and 15 may be of different lengths, and need not necessarily be coaxial; fuel passage from pipe 12 to conduit 5 may be enabled by means of recesses formed at said first end of pipe 12, or by forming pipe 12 of such a length as to allow a given clearance between the first axial end of pipe 12 and wall 6; joints 17 and 21 may be offset, i.e. holes 25 may present respective axes in different planes; the distance between joints 17 and 21 (and hence between holes 25) may be other than as shown; and body 4 and/or body 2 may be formed in a number of, preferably modular, parts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP94107598A 1993-05-17 1994-05-16 Sammelleitung für eine Kraftstoffversorgungseinrichtung einer Brennkraftmaschine Withdrawn EP0625637A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO930109U 1993-05-17
ITBO930109 IT232907Y1 (it) 1993-05-17 1993-05-17 collettore per un dispositivo di alimentazione di carburante ad un motore a combustione interna.

Publications (1)

Publication Number Publication Date
EP0625637A1 true EP0625637A1 (de) 1994-11-23

Family

ID=11338827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94107598A Withdrawn EP0625637A1 (de) 1993-05-17 1994-05-16 Sammelleitung für eine Kraftstoffversorgungseinrichtung einer Brennkraftmaschine

Country Status (2)

Country Link
EP (1) EP0625637A1 (de)
IT (1) IT232907Y1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0826873A2 (de) * 1996-08-24 1998-03-04 Volkswagen Aktiengesellschaft Einrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine
DE19747736C1 (de) * 1997-10-29 1999-04-08 Siemens Ag Druckspeicher für Kraftstoffversorgungssysteme
DE10055675A1 (de) * 2000-11-10 2002-05-16 Volkswagen Ag Einrichtung zur Verteilung von Kraftstoff für eine Brennktaftmaschine
EP2530294A1 (de) * 2011-05-31 2012-12-05 Caterpillar Motoren GmbH & Co. KG Doppelwandiges Kraftstoffversorgungsleitungselement

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3728576A1 (de) * 1987-08-27 1989-03-09 Opel Adam Ag Kraftstoffeinspritzanlage
US4955409A (en) * 1988-04-18 1990-09-11 Suzuki Jidosha Kogyo Kabushiki Kaisha Fuel supply system
EP0403871A1 (de) * 1989-06-13 1990-12-27 WEBER S.r.l. Brennstoffsammelleitung, vorzugsweise aus Kunststoff, zur Brennstoffversorgung der Injektoren eines Brennstoffeinspritzsystems eines Verbrennungsmotors
EP0508074A1 (de) * 1991-04-12 1992-10-14 Robert Bosch Gmbh Brennstoffverteiler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3728576A1 (de) * 1987-08-27 1989-03-09 Opel Adam Ag Kraftstoffeinspritzanlage
US4955409A (en) * 1988-04-18 1990-09-11 Suzuki Jidosha Kogyo Kabushiki Kaisha Fuel supply system
EP0403871A1 (de) * 1989-06-13 1990-12-27 WEBER S.r.l. Brennstoffsammelleitung, vorzugsweise aus Kunststoff, zur Brennstoffversorgung der Injektoren eines Brennstoffeinspritzsystems eines Verbrennungsmotors
EP0508074A1 (de) * 1991-04-12 1992-10-14 Robert Bosch Gmbh Brennstoffverteiler

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0826873A2 (de) * 1996-08-24 1998-03-04 Volkswagen Aktiengesellschaft Einrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine
EP0826873A3 (de) * 1996-08-24 1998-06-03 Volkswagen Aktiengesellschaft Einrichtung zur Verteilung von Kraftstoff für eine Brennkraftmaschine
US5803051A (en) * 1996-08-24 1998-09-08 Volkswagen Ag Fuel distribution arrangement for an internal combustion engine
DE19747736C1 (de) * 1997-10-29 1999-04-08 Siemens Ag Druckspeicher für Kraftstoffversorgungssysteme
US6276336B1 (en) 1997-10-29 2001-08-21 Siemens Aktiengesellschaft Pressure reservoir for fuel supply systems
DE10055675A1 (de) * 2000-11-10 2002-05-16 Volkswagen Ag Einrichtung zur Verteilung von Kraftstoff für eine Brennktaftmaschine
EP2530294A1 (de) * 2011-05-31 2012-12-05 Caterpillar Motoren GmbH & Co. KG Doppelwandiges Kraftstoffversorgungsleitungselement
WO2012163462A1 (en) * 2011-05-31 2012-12-06 Caterpillar Motoren Gmbh & Co. Kg Double-walled fuel supply line element
KR20140045959A (ko) * 2011-05-31 2014-04-17 캐터필라 모토렌 게엠베하 운트 코. 카게 이중벽 연료 공급 라인 요소
KR101990652B1 (ko) 2011-05-31 2019-09-30 캐터필라 모토렌 게엠베하 운트 코. 카게 이중벽 연료 공급 라인 요소

Also Published As

Publication number Publication date
IT232907Y1 (it) 2000-01-21
ITBO930109U1 (it) 1994-11-17
ITBO930109V0 (it) 1993-05-17

Similar Documents

Publication Publication Date Title
US5775302A (en) Fuel distributor pipe
US5070844A (en) Composite fuel rail socket for bottom- and side-feed fuel injectors
US5511527A (en) Fuel rail assembly with crossover hose
US4679537A (en) Damping device
US3486771A (en) Connector fitting
US9157401B2 (en) Apparatus for coupling components of a fuel delivery system
US5239964A (en) Concentric fuel line system
KR19980063910A (ko) 공통 레일
US7114489B2 (en) Fuel-injector manifold assembly
US5402643A (en) Flexible oil drain tube for turbocharger
US20220307454A1 (en) Fitting for a Fluid Delivery System
EP3332110B1 (de) Vielkraftstoffzuteilervorrichtung
EP2243950A1 (de) Verbinderanordnung für ein Fluidsystem
US20080048440A1 (en) Direct port connection for tubes
EP0625637A1 (de) Sammelleitung für eine Kraftstoffversorgungseinrichtung einer Brennkraftmaschine
US6488320B1 (en) Quick connect coupling
US4111370A (en) Fuel inlet fitting for a fuel injection nozzle
EP3171016A1 (de) Anschlussdichtungsstruktur für kraftstoffverteiler eines benzinmotors mit direkteinspritzung
US5333587A (en) Manifold for a system for supplying fuel to an internal-combustion engine
US11692521B2 (en) Fitting connection assembly for a fluid delivery system
US6648375B1 (en) Pilot insert seal for a tube fitting
US20080143105A1 (en) Fluid coupling
ITRM950035A1 (it) Accumulatore di alta pressione utilizzabile come tubo distributore di carburante per sistemi common-rail.
GB2248274A (en) I.c. engine fuel supply manifold
US5177958A (en) Secondary air injection valve and mounting system for automotive engine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR GB

17P Request for examination filed

Effective date: 19950224

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: MAGNETI MARELLI S.P.A.

17Q First examination report despatched

Effective date: 19960326

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19960806