WO1997021918A1 - Distributeur de carburant - Google Patents

Distributeur de carburant Download PDF

Info

Publication number
WO1997021918A1
WO1997021918A1 PCT/DE1996/001320 DE9601320W WO9721918A1 WO 1997021918 A1 WO1997021918 A1 WO 1997021918A1 DE 9601320 W DE9601320 W DE 9601320W WO 9721918 A1 WO9721918 A1 WO 9721918A1
Authority
WO
WIPO (PCT)
Prior art keywords
fuel
injection valves
fuel injection
fuel distributor
valve
Prior art date
Application number
PCT/DE1996/001320
Other languages
German (de)
English (en)
Inventor
Udo Hafner
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 WO1997021918A1 publication Critical patent/WO1997021918A1/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
    • 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
    • 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/005—Arrangement of electrical wires and connections, e.g. wire harness, sockets, plugs; Arrangement of electronic control circuits in or on fuel injection apparatus
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/004—Joints; Sealings

Definitions

  • the invention relates to a fuel distributor according to the preamble of the main claim.
  • a fuel distributor is already known from EP-OS 0 374 422, which has a plurality of connecting pieces into which injection valves of an internal combustion engine can be inserted, which in turn are supplied with fuel from the fuel distributor.
  • the fuel distributor is made of a plastic and has an almost circular, closed fuel channel. The connecting pieces are each through an opening of the fuel channel with this
  • the largely dimensionally stable fuel distributor engages in tension clamps provided on the injection valves, which are intended to allow the injection valves to be held axially.
  • a guide channel integrated in the fuel distributor and accommodating several electrical lines runs parallel to the fuel channel.
  • a plug element provided on the electrical lines engages in a connector formed on the injection valves.
  • the guide channel is provided with a receiving device in order to encompass a receiving section of a connecting part fastened to the injection valve and on which the connecting plug is provided.
  • DE-OS 30 10 613 a fuel injection system for internal combustion engines, which comprises a plurality of electromagnetically actuated fuel injectors and a dimensionally stable fuel line, the fuel line having receptacles into which the injectors can be inserted in a sealing manner.
  • the fuel line is formed by a fuel distribution line and an overlying fuel return line.
  • the individual injection valves are contacted via an electrical plug connection, so that additional contact strips or plug elements are necessary.
  • an electrical plug is provided on the fuel line in the area of each valve receptacle, via which the electrical connection to the electrical plug connection of the injection valve can be produced at the same time when the injection valve is inserted into the receptacle.
  • This solution is also complex and cumbersome, since several specially shaped plug parts have to protrude from the fuel line in the direction of the plug connections.
  • Injectors are done.
  • the designed as side feed or bottom feed injection valves Fuel injectors are supplied with fuel via an additional fuel distributor. The contacting and the fuel supply to the injection valves are therefore spatially separated from one another.
  • the fuel distributor according to the invention with the characterizing features of the main claim has the advantage that a particularly space-saving and cost-effective integration of the functions of electrical contacting and fuel supply of injection valves is achieved in a simple manner.
  • the fuel distributor which is designed as a molded plastic part, is particularly slim and compact. As a result, both the assembly of the fuel distributor z. B. facilitated in the engine compartment of a vehicle and also reduces the space required or better use the available space at a suitable location. It is of great advantage that the electrical lines integrated in the fuel distributor are very well protected against negative external influences and damage.
  • Fuel injectors are housed.
  • the advantageously formed in the form of flat strips electrical lines are arranged with minimal space requirements. These flat strips ideally lie one above the other, ie they have no radial offset from one another, which ensures the slenderness of the fuel distributor.
  • valve receptacles of the fuel distributor in such a way that, facing away from the fuel supply duct, they end with fastening tabs with which an axial and anti-rotation lock of the fuel injection valves installed in the valve receptacles is made possible.
  • the fuel distributor according to the invention also fulfills a third function of clear and reliable
  • FIG. 2 is a partial side view of the fuel distributor, through which the longitudinal extent is partially clear.
  • the fuel distributor shown for example in FIGS. 1 and 2 for fuel injection systems of mixture-compressing spark-ignition internal combustion engines is designated by 1.
  • the z. B. has an elongated shape fuel distributor 1 is used Fuel supply of at least two, for example four, fuel injection valves 3. To accommodate the fuel injection valves 3, the fuel distributor 1 has a number of fuel injection valves 3 along its length that corresponds to the number of fuel injection valves 3
  • Valve mounts 4 This z. B. at right angles to the longitudinal extent of the fuel distributor 1 extending valve receptacles 4 have inner valve receiving openings 5 which, for. B. are designed stepped and in which the fuel injectors 3 can be used so that the valve seats 4, the fuel injectors 3 in the direction of a longitudinal axis 7 of each valve receiving opening 5 at least partially surround.
  • the valve receptacle openings 5 are for the fuel supply of the fuel injection valves 3 in direct connection with a fuel supply channel 8, which, for example, has a circular cross-section and runs transversely with respect to the valve receptacle openings 5 and extends transversely to the valve receptacle openings 5.
  • Valve receiving openings 5 thus represent branch channels of the fuel supply channel 8.
  • the wall of the fuel distributor 1 enveloping the fuel supply channel 8 has a largely constant wall thickness.
  • top-feed injection valves are particularly suitable as fuel injection valves 3 for use on the fuel distributor 1 according to the invention, in which the fuel supply takes place via the end opposite the injection end.
  • Fuel injection valves 3 is dispensed with, since such a fuel injection valve 3 z. B. is largely known from DE-OS 43 25 842.
  • the fuel injector 3 that can be used in the fuel distributor 1 according to the invention has no electrical one Connector on as it is known from the aforementioned document. It is precisely through the integration of the functions of contacting and fuel supply of the fuel injection valves 3 according to the invention that such a connector can be dispensed with, which in turn is associated with an advantageous reduction in installation space.
  • other designs of known injection valves can also be used on the fuel distributor 1.
  • An upper sealing ring 10 is provided on the fuel injection valve 3, with which a seal between the circumference of the fuel injection valve 3 and the wall of the valve receiving opening 5 is achieved. This prevents the fuel to be supplied to the inlet end of the fuel injection valve 3 from escaping from the valve receiving opening 5 at an undesired point.
  • z. B. formed as a plastic molded fuel distributor 1 electrical lines 12, which in particular have the form of flat strips, also injected.
  • the flat strips 12 are thus largely surrounded by plastic and are therefore protected from external influences.
  • the valve receptacles 4 extend as largely tubular fuel distributor sections along the longitudinal receptacles 7. A secure attachment of the fuel injection valves 3 in the valve receptacle openings 5 of the fuel distributor 1 is, for. B.
  • each fuel injection valve 3 sawtooth-like protruding lugs 14 (detent springs) in openings 15 or windows of two mounting tabs 16 extending parallel to the longitudinal axes 7 of the receiving
  • the two lugs 14 are e.g. B. offset from each other by 180 °.
  • the Fastening tabs 16 can have snap hooks 17 at their lower end, which are below the z. B. square openings 15 follow and in the attached state directly under the provided on the fuel injectors 3 lugs 14.
  • valve receptacles 4 with their valve receiving openings 5 are only provided directly for receiving the fuel injection valves 3 and therefore not over the longitudinal extent of the
  • Fuel distributor 1 run, extends in addition to the fuel supply channel 8 and the wall surrounding it, a side contacting front 19 over the entire length of the fuel distributor 1. This side contacting front 19 is integral with the
  • Fuel distributor 1 is formed and emerges directly from the walls of the fuel supply channel 8 or the valve receptacles 4 or into them.
  • the side contacting front 19 ultimately connects the individual valve receptacles 4 to one another laterally. Exactly in this side contacting front 19 run the previously mentioned flat strips 12 serving as electrical lines, which are completely surrounded by plastic and thus also have no conductive connections to one another.
  • Each fuel injector 3 is e.g. B. connected to a ground line 12 ', for example the most distant from the fuel supply channel 8, while all other flat strips 12 are arranged parallel to the longitudinal axis 7 above it.
  • the parallelism of the flat strips 12 is only to be understood in such a way that the flat strips 12 are lined up in a line lying parallel to the longitudinal axis 7 of the receptacle, as illustrated by the section in FIG. The real one
  • the direction of extension of the flat strips 12 is of course in the side contacting front 19 along the longitudinal extent of the fuel distributor 1, wherein at least the ground line 12 'also extends over almost the entire length of the fuel distributor 1.
  • angled contact elements 20 which represent hook-shaped contact tabs.
  • the ends 22 of the flat strips 12, 12 'emerging from the plastic of the fuel distributor 1 are, after the installation of the fuel injection valves 3 in the valve receptacles 4, viewed exactly flush from the outside behind the vertically upstanding contact elements 20.
  • the ends 22 of the flat strips 12, 12 'on the contact elements 20 offer various options. As shown in FIGS. 1 and 2, bores 23 can be formed in the contact elements 20 and in the flat strips 12, 12 ', into the ones not shown additional connecting means can be inserted or used. Screw or rivet connections can, for. B. can be achieved in this way.
  • non-detachable connections are also conceivable, e.g. B. can be produced by means of resistance welding or soldering. Resistance welding, which can be used in the spot welding or projection welding process variants, appears to be particularly advantageous. When using projection welding, the
  • Contact elements 20 are then already provided with corresponding welding bosses or elevations with similar geometric shapes. These surveys (welding bosses) enable a defined current transition point and thus the necessary welding cross-section. For example, a
  • the fuel distributor 1 is designed in these areas such that free spaces 25 are formed immediately behind the ends 22. After making the fixed connections, these are z. B. secured with adhesive or varnish.
  • the chamber-like free spaces 25 and the space outside the contact elements 20 can also be used in such a way that the areas of the contacting are completely enclosed by pouring or extrusion-coating with plastic.
  • the ends of the flat strips 12, 12 'facing away from the fuel injection valves 3, not shown, are e.g. B. summarized in a symbolically indicated connector 26, which in turn is connected to an electronic control unit via electrical lines connected to it.
  • the plug 26 is formed, for example, in one piece with the fuel distributor 1. The fuel can be fed into the fuel supply channel 8 either from the side on which the plug 26 is provided or from the opposite side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)

Abstract

L'invention concerne un distributeur de carburant pour systèmes d'injection de carburant de moteurs à combustion interne, qui comprend un canal d'alimentation en carburant (8), ainsi qu'un nombre de supports de soupape (4), correspondant au nombre de soupapes d'injection de carburant (3) à utiliser. Outre l'alimentation des soupapes d'injection (3) en carburant, ce distributeur de carburant (1) assure également la mise en contact électrique desdites soupapes d'injection de carburant (3), des lignes électriques (12) étant intégrées directement dans ledit distributeur de carburant (1) qui se présente sous forme de pièce moulée en plastique. Ce distributeur de carburant (1) est de ce fait particulièrement mince et compact. Il assure en outre un blocage axial et un blocage en rotation des soupapes d'injection de carburant (3). Ce distributeur de carburant s'utilise notamment dans des systèmes d'injection du carburant de moteurs à combustion interne à allumage commandé comprimant le mélange, pour alimenter plusieurs soupapes d'injection en carburant.
PCT/DE1996/001320 1995-12-13 1996-07-19 Distributeur de carburant WO1997021918A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19546441A DE19546441A1 (de) 1995-12-13 1995-12-13 Brennstoffverteiler
DE19546441.9 1995-12-13

Publications (1)

Publication Number Publication Date
WO1997021918A1 true WO1997021918A1 (fr) 1997-06-19

Family

ID=7779941

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1996/001320 WO1997021918A1 (fr) 1995-12-13 1996-07-19 Distributeur de carburant

Country Status (2)

Country Link
DE (1) DE19546441A1 (fr)
WO (1) WO1997021918A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2391908A (en) * 2003-04-10 2004-02-18 Delphi Tech Inc I.c. engine common rail fuel distribution system

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767873B1 (fr) * 1997-09-02 1999-11-19 Peugeot Dispositif de connexion des injecteurs d'un moteur a combustion interne
DE19902186A1 (de) 1999-01-21 2000-07-27 Bosch Gmbh Robert Brennstoffeinspritzvorrichtung
DE10136050A1 (de) 2001-07-25 2003-02-13 Bosch Gmbh Robert Verfahren zur Herstellung eines Kraftstoffzuteilers mit integrierten Einspritzventilen
EP1793122B1 (fr) * 2005-12-02 2010-10-27 Continental Automotive GmbH Assemblage d'injecteur de carburant
DE102006004771B4 (de) * 2006-02-02 2019-11-07 Robert Bosch Gmbh Kontaktelement zur elektrischen Kontaktierung
EP2058509B1 (fr) 2007-11-12 2012-07-18 Continental Automotive GmbH Raccord

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570601A (en) * 1983-11-15 1986-02-18 Nippondenso Co., Ltd. Fuel delivery pipe
EP0374422A1 (fr) * 1988-12-22 1990-06-27 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Conduite de carburant
US4950171A (en) * 1989-08-11 1990-08-21 Itt Corporation Fuel injector connector system
US5086743A (en) * 1990-12-20 1992-02-11 Ford Motor Company Integrally formed and tuned fuel rail/injectors
EP0653278A1 (fr) * 1993-11-17 1995-05-17 Sumitomo Wiring Systems, Ltd. Procédé de surmoulage d'un insert métallique et un bloc de connexion pour injecteurs pour un moteur à combustion interne

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570601A (en) * 1983-11-15 1986-02-18 Nippondenso Co., Ltd. Fuel delivery pipe
EP0374422A1 (fr) * 1988-12-22 1990-06-27 Dr.Ing.h.c. F. Porsche Aktiengesellschaft Conduite de carburant
US4950171A (en) * 1989-08-11 1990-08-21 Itt Corporation Fuel injector connector system
US5086743A (en) * 1990-12-20 1992-02-11 Ford Motor Company Integrally formed and tuned fuel rail/injectors
EP0653278A1 (fr) * 1993-11-17 1995-05-17 Sumitomo Wiring Systems, Ltd. Procédé de surmoulage d'un insert métallique et un bloc de connexion pour injecteurs pour un moteur à combustion interne

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2391908A (en) * 2003-04-10 2004-02-18 Delphi Tech Inc I.c. engine common rail fuel distribution system

Also Published As

Publication number Publication date
DE19546441A1 (de) 1997-06-19

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