EP0475829A1 - Vorrichtung zur Kraftstoffversorgung und Halterung mehrerer Kraftstoffeinspritzventile für Verbrennungsmotoren - Google Patents

Vorrichtung zur Kraftstoffversorgung und Halterung mehrerer Kraftstoffeinspritzventile für Verbrennungsmotoren Download PDF

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Publication number
EP0475829A1
EP0475829A1 EP91402392A EP91402392A EP0475829A1 EP 0475829 A1 EP0475829 A1 EP 0475829A1 EP 91402392 A EP91402392 A EP 91402392A EP 91402392 A EP91402392 A EP 91402392A EP 0475829 A1 EP0475829 A1 EP 0475829A1
Authority
EP
European Patent Office
Prior art keywords
plate
injectors
housings
screw
intake duct
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Withdrawn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
EP91402392A
Other languages
English (en)
French (fr)
Inventor
Dominique Desportes
Jean-Claude Gallot
Jean Pierre Breton
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.)
Automobiles Peugeot SA
Automobiles Citroen SA
Renault SAS
Regie Nationale des Usines Renault
Original Assignee
Automobiles Peugeot SA
Automobiles Citroen SA
Renault SAS
Regie Nationale des Usines Renault
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
Priority claimed from FR9011274A external-priority patent/FR2666626B1/fr
Priority claimed from FR9103455A external-priority patent/FR2674292B1/fr
Application filed by Automobiles Peugeot SA, Automobiles Citroen SA, Renault SAS, Regie Nationale des Usines Renault filed Critical Automobiles Peugeot SA
Publication of EP0475829A1 publication Critical patent/EP0475829A1/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Withdrawn legal-status Critical Current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
    • 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 fuel supply to the injectors is ensured in a large number of cases, by a supply line connected to the upper end of the injector.
  • the latter is connected by its lower part, to the intake duct of a cylinder of the engine.
  • the need to arrange the supply line, also called a ramp, above the injection assembly makes this mode of supplying the injectors particularly bulky.
  • this fuel may diffuse inside the walls of the supply duct integrated into the intake manifold, if the latter is produced in a porous material. This is the case, for example, for aluminum collectors made in foundry, because of the porosities introduced into the material by this manufacturing process.
  • the present invention solves these problems by proposing a device for holding and supplying several fuel injectors for an internal combustion engine, independent of the intake manifold, and whose size is particularly reduced.
  • the subject of the present invention is a device for supplying and holding several fuel injectors for an internal combustion engine, these injectors being fed laterally by a supply duct, and being housed and centered respectively in several housings formed with said supply duct, and the lower part of which is tightly connected to an opening of the fuel intake duct in an engine cylinder, the aforementioned supply duct and its associated housings being made of a non-porous material, this device being characterized in that the housings are interconnected by a reinforcing plate and in that the injectors are held in position in the housings by means of a plate fixed to the reinforcing platen by means of a screw.
  • the lower part of the wall of the housings comprises a plate ensuring the fixing of the device on the intake duct or near this intake duct of the cylinder.
  • a flat seal is interposed between the lower part of the wall of at least one housing and the edge of the corresponding opening of the intake duct.
  • the seal between the lower part of the wall of at least one housing and the edge of the corresponding opening of the intake duct is produced by means of an O-ring.
  • a flat seal is interposed between the bottom wall of the plate at least one housing and the edge of the corresponding opening of the intake duct.
  • the aforementioned screw enters an opening formed in the plate by its side facing the motor and is screwed into a nut integral with said plate so that the unscrewing the screw prior to disassembly of an injector, made impossible from the top of the engine M, requires disassembly of the bar.
  • the aforementioned nut is welded to the plate.
  • a fabric is arranged opposite the head of the screw when the bar is in the service position.
  • This fabric came in shape with the wall of the intake manifold. This increases the efficiency of the safety device by adding an additional barrier to access to the screw head.
  • all the injectors are connected by a single plate, the plate being formed by an extension of the wall of the housings.
  • FIG. 1 one sees one of the fuel injectors 2 of the injection system of an engine, introduced and centered in one of the housings 10 formed at the same time as a lateral supply duct 1 for the injectors 2
  • This housing 10 has a shape substantially corresponding to that of the injector 2, and its upper part has an annular recess 100 intended to receive an upper part of corresponding shape from the injector 2 so as to ensure its positioning in said housing 10 (figure 5).
  • This supply duct 1 and its associated housings 10 are made of a non-porous material having satisfactory fuel sealing characteristics.
  • the lower part of the housing 10 is introduced and centered in an opening 30 of the intake duct 3 of an engine cylinder, through which the fuel is injected.
  • Two fuel seals 4 are interposed respectively between the upper 21 and lower 22 parts of the injectors 2, and the wall 11, 12 of the housings 10 opposite these parts 21, 22, so that the part of the injector 2 located between these two seals 4 is embedded in the fuel.
  • a seal 8 is interposed between the end walls of the lower part 13 of the housing 10 and the walls delimiting a recess 17 formed in the edge of the opening 30 of the intake duct 3.
  • the supply and maintenance device comprises three housings 10 intended to each receive an injector 2, connected together by a reinforcing plate 18.
  • Each injector 2 is held in position in its housing 10 by means of a plate 5 covering the injector 2, in which an opening has been provided allowing the passage of the upper part 24 of the injector 2.
  • the aforementioned plate 5 is supported by its face lower on the upper edge of the housings 10, and is fixed to the reinforcing plate 18 by means of a fixing screw 101.
  • the device according to the invention is fixed to the intake duct 3 by means of a plate 14, formed at the base of the housings 10, and in which an opening 14a has been formed. for the passage of a fixing screw intended to be screwed onto the intake duct 3 of the cylinder.
  • a fixing screw intended to be screwed onto the intake duct 3 of the cylinder.
  • the plate 18 To allow this screwing in the case of the middle housing 10, there is provided, in the plate 18, a cutout 18a, in line with the opening 14a made in the plate 14 secured to this housing. It should be noted that provision may also be made for fixing the plate 14 in the vicinity of said intake duct 3.
  • the seal can be obtained by interposing a flat seal 6 between the lower end wall of the housing 10 and the walls defining a recess 15 formed in the upper edge of the corresponding opening 30 of the conduit d admission 3.
  • This sealing can also be obtained by means of an O-ring 7 interposed between the walls delimiting a recess 16 formed in the lower and lateral part of the wall of the housing 10 and the surfaces delimiting the corresponding opening 30 of the intake duct 3 opposite these walls.
  • the seal can be achieved by a flat seal 8 interposed between the lower wall 140 of the aforementioned plate 14, and the walls defining a recess 17 formed in the upper edge of the corresponding opening 30 of the aforementioned conduit 3.
  • the gasket also serves as thermal insulation and reduces the value of the temperature in the vicinity of the end of the injector introduced into the opening of the intake duct.
  • the injectors 2 are positioned, centered and maintained in the housings 10 of the supply duct 1, the latter directing the fuel around the side walls of the injectors 2 without causing fuel to leak out of said duct 1.
  • All of the supply duct and its associated housings (bar) can be made of any material having sufficient fuel tightness: aluminum material, ferrous material in mechanical welding, plastic injected under pressure, etc.
  • This assembly also has the advantage of being autonomous, in the sense that it allows the installation of the injectors outside the engine assembly line. This will verify the tightness of the device, on a specific station, before mounting. This will result in a qualitative improvement in production.
  • the devices for supplying and holding several injectors according to the invention, or bars, can be adapted to each type of injector without it being necessary to modify the structure of the intake manifold.
  • the device for holding and supplying several fuel injectors mainly comprises a supply duct (or ramp) 1, comprising a plurality of housings 10 which are shaped with said supply duct 1 and intended to house each an injector 2.
  • the holding in position of each injector is ensured by on the one hand, a shoulder formed at the upper part of the injector 2, supported by its lower surface, on a horizontal surface of a recess 100 of corresponding shape provided at the upper part of the wall of the housing 10, and on the other hand a plate 5 come in shape with the supply duct 1, crossed by the upper part of the injectors 2 and on which is fixed a plate reinforcement 18, by means of assembly screws 101.
  • the aforementioned assembly is carried out by means of a screw 101 and a nut 102 secured to the aforementioned plate 18, the head 103 of the screw 101 being oriented on the side of the motor (not shown in this figure but visible in Figure 3), and therefore made inaccessible from the top of this engine.
  • the above-mentioned nut 102 is welded to the upper part of the plate 18.
  • FIGS. 9 and 10 show two strips of injectors fixed to an intake manifold 9 in the vicinity of the intake conduits 3 of the cylinders in an internal combustion engine M.
  • the intake manifold 9 has a projecting part 90 or fabric under the head 103 of the screw 101 for assembling the plate 5 on the plate 18, intended to increase the inaccessibility of the head 103 of the screw 101 when the bar is in place.
  • a device for lateral supply and holding of several injectors has been produced, compact, independent of the intake manifold, and which makes it possible to avoid the drawbacks linked to the obligation to produce a duct for power integrated into the intake manifold, this device can be adapted to each type of injector.
  • the bar is made non-removable when the support is fixed to the engine.
  • assembly screw could be replaced for example by a threaded rod and two nuts, one of which would be formed by the plate.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP91402392A 1990-09-12 1991-09-06 Vorrichtung zur Kraftstoffversorgung und Halterung mehrerer Kraftstoffeinspritzventile für Verbrennungsmotoren Withdrawn EP0475829A1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FR9011274 1990-09-12
FR9011274A FR2666626B1 (fr) 1990-09-12 1990-09-12 Dispositif d'alimentation et de maintien de plusieurs injecteurs de carburant pour un moteur a combustion interne.
FR9103455 1991-03-21
FR9103455A FR2674292B1 (fr) 1991-03-21 1991-03-21 Dispositif d'alimentation et de maintien de plusieurs injecteurs de carburant pour un moteur a combustion interne a systeme de protection des cylindres incorpore.

Publications (1)

Publication Number Publication Date
EP0475829A1 true EP0475829A1 (de) 1992-03-18

Family

ID=26228233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91402392A Withdrawn EP0475829A1 (de) 1990-09-12 1991-09-06 Vorrichtung zur Kraftstoffversorgung und Halterung mehrerer Kraftstoffeinspritzventile für Verbrennungsmotoren

Country Status (1)

Country Link
EP (1) EP0475829A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372113A (en) * 1994-01-25 1994-12-13 Siemens Automotive L.P. Weir control of fuel level in a fuel rail tube for reducing the risk of hydra-lock
WO2020154153A1 (en) * 2019-01-24 2020-07-30 Caterpillar Inc. Fuel rail

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788287A (en) * 1972-02-18 1974-01-29 Gen Motors Corp Fuel injection system
DE3228508A1 (de) * 1982-07-30 1984-02-02 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffversorgungsleitung
DE3326408A1 (de) * 1982-08-23 1984-02-23 General Motors Corp., Detroit, Mich. Montagegestell fuer kraftstoffeinspritzeinrichtungen von brennkraftmaschinen
US4475486A (en) * 1982-02-18 1984-10-09 General Motors Corporation Engine induction system
DE3644552A1 (de) * 1986-12-24 1988-07-07 Pierburg Gmbh Brennstoffverteilerleiste fuer ottomotoren
US4768487A (en) * 1985-11-22 1988-09-06 Nissan Motor Company, Limited Internal combustion engine intake passage
EP0306739A2 (de) * 1987-09-11 1989-03-15 Robert Bosch Gmbh Vorrichtung zur Halterung, Kraftstoffversorgung und elektrischen Kontaktierung von elektromagnetisch betätigbaren Kraftstoffeinspritzventilen
WO1989004919A2 (en) * 1987-11-16 1989-06-01 Siemens-Bendix Automotive Electronics L.P. Pico fuel injector valve
FR2638490A1 (fr) * 1988-11-03 1990-05-04 Weber Srl Procede de fabrication d'un distributeur de carburant pour alimenter en carburant les soupapes de dosage et d'atomisation d'un dispositif d'alimentation de moteur a combustion interne
US4950171A (en) * 1989-08-11 1990-08-21 Itt Corporation Fuel injector connector system
WO1990013740A1 (de) * 1989-05-09 1990-11-15 Robert Bosch Gmbh Kraftstoffverteiler für kraftstoffeinspritzanlagen von brennkraftmaschinen

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788287A (en) * 1972-02-18 1974-01-29 Gen Motors Corp Fuel injection system
US4475486A (en) * 1982-02-18 1984-10-09 General Motors Corporation Engine induction system
DE3228508A1 (de) * 1982-07-30 1984-02-02 Robert Bosch Gmbh, 7000 Stuttgart Kraftstoffversorgungsleitung
DE3326408A1 (de) * 1982-08-23 1984-02-23 General Motors Corp., Detroit, Mich. Montagegestell fuer kraftstoffeinspritzeinrichtungen von brennkraftmaschinen
US4768487A (en) * 1985-11-22 1988-09-06 Nissan Motor Company, Limited Internal combustion engine intake passage
DE3644552A1 (de) * 1986-12-24 1988-07-07 Pierburg Gmbh Brennstoffverteilerleiste fuer ottomotoren
EP0306739A2 (de) * 1987-09-11 1989-03-15 Robert Bosch Gmbh Vorrichtung zur Halterung, Kraftstoffversorgung und elektrischen Kontaktierung von elektromagnetisch betätigbaren Kraftstoffeinspritzventilen
WO1989004919A2 (en) * 1987-11-16 1989-06-01 Siemens-Bendix Automotive Electronics L.P. Pico fuel injector valve
FR2638490A1 (fr) * 1988-11-03 1990-05-04 Weber Srl Procede de fabrication d'un distributeur de carburant pour alimenter en carburant les soupapes de dosage et d'atomisation d'un dispositif d'alimentation de moteur a combustion interne
WO1990013740A1 (de) * 1989-05-09 1990-11-15 Robert Bosch Gmbh Kraftstoffverteiler für kraftstoffeinspritzanlagen von brennkraftmaschinen
US4950171A (en) * 1989-08-11 1990-08-21 Itt Corporation Fuel injector connector system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 14, no. 418 (M-1022)(4361) 10 Septembre 1990 & JP-A-2 163 464 ( NIPPON DENSO ) 22 Juin 1990 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5372113A (en) * 1994-01-25 1994-12-13 Siemens Automotive L.P. Weir control of fuel level in a fuel rail tube for reducing the risk of hydra-lock
WO2020154153A1 (en) * 2019-01-24 2020-07-30 Caterpillar Inc. Fuel rail
US10794346B2 (en) 2019-01-24 2020-10-06 Caterpillar Inc. Fuel rail
CN113302393A (zh) * 2019-01-24 2021-08-24 卡特彼勒公司 燃料轨
CN113302393B (zh) * 2019-01-24 2024-06-21 卡特彼勒公司 燃料轨

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