EP0154209B1 - Soupape d'injection pour l'injection dans le conduit d'admission des moteurs à combustion - Google Patents

Soupape d'injection pour l'injection dans le conduit d'admission des moteurs à combustion Download PDF

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Publication number
EP0154209B1
EP0154209B1 EP85101463A EP85101463A EP0154209B1 EP 0154209 B1 EP0154209 B1 EP 0154209B1 EP 85101463 A EP85101463 A EP 85101463A EP 85101463 A EP85101463 A EP 85101463A EP 0154209 B1 EP0154209 B1 EP 0154209B1
Authority
EP
European Patent Office
Prior art keywords
injection valve
injection
protective cap
elements
mouthpiece
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.)
Expired
Application number
EP85101463A
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German (de)
English (en)
Other versions
EP0154209A1 (fr
Inventor
Jurij Gartner
Wolfgang Dipl.-Ing. Kaindl
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.)
Bayerische Motoren Werke AG
Original Assignee
Bayerische Motoren Werke AG
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 Bayerische Motoren Werke AG filed Critical Bayerische Motoren Werke AG
Publication of EP0154209A1 publication Critical patent/EP0154209A1/fr
Application granted granted Critical
Publication of EP0154209B1 publication Critical patent/EP0154209B1/fr
Expired 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
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/14—Arrangements of injectors with respect to engines; Mounting of injectors
    • F02M61/145—Arrangements of injectors with respect to engines; Mounting of injectors the injection nozzle opening into the air intake conduit

Definitions

  • the invention is based on the preamble of the independent claim from DE-A 29 26 490.
  • the O-ring arranged on the mouthpiece of the injection valve is pressed radially when inserted into the receiving bore of the intake manifold wall.
  • the radial pressure of the rubber-elastic sealing ring is introduced via a conical chamfer on the receiving bore, whereby the interaction of the O-ring or sealing ring and the conical chamfer results in the injection valve being centered when it is inserted into the receiving bore.
  • the mouthpiece of the injection valve is kept centered on the radially pressed sealing ring in the receiving bore or the wall opening of the intake manifold.
  • this centering chamfer is generally relatively short in the insertion direction and has a relatively large cone angle. At the transition from the centering chamfer to the receiving bore, this results in a relatively sharp edge, which can lead to damage to the O-ring in the case of a mouthpiece of the injection nozzle which is attached to the outside of the receiving bore.
  • This risk is particularly great if a plurality of injection valves arranged on a common fuel distribution line are arranged simultaneously in receiving bores in individual intake pipes of an intake system.
  • a plug-in arrangement with an interposed sealing ring is provided for noise decoupling between the injection valves and the fuel rail, which is similar to the plug-in arrangement described above on the intake manifold side.
  • the invention has for its object to show a configuration for an injection valve of the type described above, by which damage to the sealing ring is avoided when the injection valve is inserted into the receiving bore of the suction line.
  • the invention achieves a centering device which can be arranged or arranged in the free end region of the mouthpiece and serves as an assembly aid.
  • a particularly inexpensive embodiment of this centering device is achieved according to claim 2 in that the centering device is arranged on a protective cap known from the prior art for the mouthpiece of the injection valve.
  • the further embodiment of the protective cap, which is preferably made of plastic, according to claims 3 and 4 can be seen in the elastically flexible outer contour created by additional arrangements. This advantageously supports the self-centering of the injection nozzle.
  • elements are arranged in a rotationally symmetrical envelope contour tapering in the direction of insertion, which support the automatic penetration of the mouthpiece into the receiving bore and prevent damage to the sealing rings on the machining edges.
  • An injection valve 1 for a mixture-compressing internal combustion engine (not shown) carries an O-ring 3 on a mouthpiece 2.
  • the 0-ring 3 is arranged on the mouthpiece 2 between a shoulder 4 of the injection valve 1 and a protective cap 5 in the free end region of the mouthpiece 2.
  • the injection valve 1 is inserted with its mouthpiece 2 into a wall opening 7 in the intake manifold 6, the position of the injection valve 1 essentially being achieved by the pressed 0-ring 3 between the wall opening 7 and the mouthpiece 2 becomes.
  • the wall opening or receiving bore 7 has a chamfer 8 on the insertion side.
  • a centering device 9 on the protective cap 5 ensures that the injection valve 1 is centered in the receiving bore 7 at the beginning of the insertion process and is guided centrally during the further insertion until the O-ring 3 bears against the chamfer 8.
  • the centering device 9 comprises on the protective cap 5 made of plastic tongues 10, which are elastically flexible transversely to the insertion direction arrow "A" of the injection valve 1 and have an outer contour lying in the outer surface of a hemisphere. Furthermore, the edge areas of the non-deformed tongues 10 lie on a diameter which corresponds at least to the outer diameter of the unpressed O-ring 3. This configuration of the Centering device 9 prevents an eccentric position of the mouthpiece 2 of the injection valve 1 when it is inserted and thus prevents possible damage to the rubber-elastic O-ring 3 on the machining edges 11 and 12.
  • a centering device 13 comprises webs 15 arranged on the outer circumference of a protective cap 14, which webs have an outer contour lying in the lateral surface of a cone. With increasing diameter, these webs 15 each change from a rectangular cross section to a crescent cross section.
  • the protective cap 14 made of elastic material, the free ends of the crescent-shaped cross sections form elastically flexible lips 16 in the circumferential direction.
  • the undeformed lips 16 on the webs 15 are inscribed with a diameter which corresponds to the outer diameter of the unpressed 0-ring 3.
  • the webs 15 with their ramps 17 lying on the lateral surface of a relatively slender cone substantially facilitate the threading of the injection valve 1 into the receiving bore 7, which additionally improves the self-centering of the injection valve 1.
  • the lips 16 rest on the webs 15 due to the crescent-shaped cross section on the wall of the receiving bore 7.
  • the degree of flexibility of the lips 16 and thus their flexibility transverse to the direction of insertion arrow "A" can be determined.
  • With a coordinated crescent-shaped cross-section and the material of the webs 15 or the protective cap 14 secure centering can be achieved when the injection valve 1 is inserted into the receiving bore 7 with the least possible lateral offset.

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

Claims (4)

1°) Soupape pour l'injection dans la tubulure d'admission de moteurs à combustion interne, en particulier pour l'injection dans une tubulure d'admission unique avec une conduite de distribution de carburant commune à plusieurs tubulures d'admission:
- comportant une embouchure (2) présentent une ouverture d'injection,
- qui peut être enfoncée dans un passage (7) à travers la paroi de la tubulure d'admission (6), et
- qui est maintenue centrée dans ce passage (7) par interposition d'un joint d'étanchéité (joint torique 3) ayant l'élasticité du caoutchouc, caractérisée en ce que:
- il est prévu un dispositif spécial (9, 13) qui centre l'extrémité libre de l'embouchure (2) quand on enfonce la soupape d'injection (1) dans le passage (7) traversant la paroi,
- qui présente des éléments (languettes 10, lèvres 16) disposés sur la circonférence d'un contour en forme de douille réalisé en symétrie de rotation, se rétrécissant dans la direction de l'enfoncement (flèche "A"),
- qui, maintenus écartés de la bague d'étanchéité (joint torique 3) dans la direction de l'enfoncement, se terminent avec un diamètre qui correspond au moins au diamètre extérieur de la bague d'étanchéité quand elle n'est pas comprimée et
- qui cèdent élastiquement perpendiculairement à la direction d'enfoncement au moins dans la zone voisine de la bague d'étanchéité.
2°) Soupape d'injection suivant la revendication 1, comportant un chapeau (5, 14) qui peut être disposé sur l'extrémité libre de l'embouchure (2), caractérisée en ce que le dispositif de centrage (9, 13) est disposé sur le chapeau de protection (5, 14).
3°) Soupape d'injection suivant la revendication 2, caractérisée en ce que des languettes (10) sont disposées sur le chapeau (5) de protection, comme éléments du dispositif (9) de centrage, et présentent un contour extérieur qui s'inscrit dans la surface enveloppante d'un hémisphère ou d'un cône.
4°) Soupape d'injection suivant la revendication 2, caractérisée en ce que:
- des entretoises (15) sont disposées sur la circonférence extérieure du chapeau de protection (14),
- ces entretoises présentant un contour extérieur qui s'inscrit dans la surface enveloppante d'un cône ou d'un hémisphère, et
- se transformant chaque fois en une section transversale en forme de faucille quand le diamètre augmente,
- les extrémités libres des sections transversales en forme de faucille formant, comme éléments du dispositif de centrage (13), des lèvres (16), qui cèdent élastiquement dans le sens de la circonférence.
EP85101463A 1984-02-23 1985-02-12 Soupape d'injection pour l'injection dans le conduit d'admission des moteurs à combustion Expired EP0154209B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3406487 1984-02-23
DE19843406487 DE3406487A1 (de) 1984-02-23 1984-02-23 Einspritzventil fuer gemischverdichtende brennkraftmaschinen, insbesondere fuer einzelsaugrohr-einspritzung

Publications (2)

Publication Number Publication Date
EP0154209A1 EP0154209A1 (fr) 1985-09-11
EP0154209B1 true EP0154209B1 (fr) 1987-04-29

Family

ID=6228555

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85101463A Expired EP0154209B1 (fr) 1984-02-23 1985-02-12 Soupape d'injection pour l'injection dans le conduit d'admission des moteurs à combustion

Country Status (4)

Country Link
US (1) US4829965A (fr)
EP (1) EP0154209B1 (fr)
DE (2) DE3406487A1 (fr)
WO (1) WO1986005845A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3406487A1 (de) * 1984-02-23 1985-08-29 Bayerische Motoren Werke AG, 8000 München Einspritzventil fuer gemischverdichtende brennkraftmaschinen, insbesondere fuer einzelsaugrohr-einspritzung
DE3502919A1 (de) * 1985-01-29 1986-07-31 Bayerische Motoren Werke AG, 8000 München Einspritzventil fuer gemischverdichtende brennkraftmaschinen
DE3615635A1 (de) * 1986-05-09 1987-11-12 Bosch Gmbh Robert Kraftstoff-einspritzduese fuer brennkraftmaschinen
DE3919231C2 (de) * 1989-06-13 1997-03-06 Bosch Gmbh Robert Kraftstoffeinspritzeinrichtung für Brennkraftmaschinen
GB8926363D0 (en) * 1989-11-22 1990-01-10 Lucas Ind Plc Fuel injection system
DE19621221A1 (de) * 1996-05-25 1997-11-27 Bosch Gmbh Robert Aggregat und Schnappvorrichtung für ein Aggregat
DE19908154B4 (de) * 1999-02-25 2006-11-09 Schaeffler Kg Spannelement
DE10065225B4 (de) * 2000-12-27 2005-09-22 Fränkische Rohrwerke Gebr. Kirchner GmbH + Co. KG Verbindungsanordnung
DE50110145D1 (de) * 2001-01-12 2006-07-27 Ford Global Tech Inc Geraeuschreduzierende Anordnung von Unterlegscheiben unter einer Einspritzduese
DE10108467A1 (de) * 2001-02-22 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung
DE10109408A1 (de) * 2001-02-28 2002-09-05 Bosch Gmbh Robert Befestigungsvorrichtung
DE10338715B4 (de) * 2003-08-22 2014-07-17 Robert Bosch Gmbh Ausgleichselement für ein Brennstoffeinspritzventil
DE102005006818A1 (de) * 2005-02-15 2006-08-17 Volkswagen Mechatronic Gmbh & Co. Kg Dichtungseinrichtung für einen Kraftstoffinjektor sowie Verfahren zum Abdichten
JP4592012B2 (ja) * 2005-06-03 2010-12-01 株式会社小糸製作所 車輌用灯具の洗浄装置及び車輌用灯具の洗浄装置のノズルカバー
DE102014219036A1 (de) * 2014-09-22 2016-04-07 Volkswagen Aktiengesellschaft Saugrohr für eine Brennkraftmaschine
WO2017027741A1 (fr) * 2015-08-12 2017-02-16 Cummins Inc. Écran de combustion de buse et élément d'étanchéité à capacités de transfert de chaleur améliorées
DE102015223605A1 (de) * 2015-11-27 2017-06-01 Robert Bosch Gmbh Injektoranordnung mit Thermoschutzhülse

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7232185U (de) * 1972-08-31 1975-06-12 Porsche F Ag Vorrichtung zur Halterung einer Brennstoffeinspritzdüse

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2149817B2 (de) * 1971-10-06 1975-08-21 Daimler-Benz Ag, 7000 Stuttgart Anordnung eines Kraftstoffeinspritzventils zur elektronisch gesteuerten Benzineinspritzung in den Ansaugkanal einer Brennkraftmaschine
DE2208646C2 (de) * 1972-02-24 1986-11-06 Robert Bosch Gmbh, 7000 Stuttgart Vorrichtung zur Befestigung elektromagnetischer Einspritzventile an gemischverdichtenden Brennkraftmaschinen
DE2824476C2 (de) * 1978-06-03 1983-03-17 Bayerische Motoren Werke AG, 8000 München Brennstoffeinspritzdüsenbefestigung an einer Brennkraftmaschine
DE3000061C2 (de) * 1980-01-03 1993-10-14 Bosch Gmbh Robert Kraftstoffeinspritzdüse für Brennkraftmaschinen
DE3406487A1 (de) * 1984-02-23 1985-08-29 Bayerische Motoren Werke AG, 8000 München Einspritzventil fuer gemischverdichtende brennkraftmaschinen, insbesondere fuer einzelsaugrohr-einspritzung
DE3502919A1 (de) * 1985-01-29 1986-07-31 Bayerische Motoren Werke AG, 8000 München Einspritzventil fuer gemischverdichtende brennkraftmaschinen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7232185U (de) * 1972-08-31 1975-06-12 Porsche F Ag Vorrichtung zur Halterung einer Brennstoffeinspritzdüse

Also Published As

Publication number Publication date
EP0154209A1 (fr) 1985-09-11
WO1986005845A1 (fr) 1986-10-09
DE3406487A1 (de) 1985-08-29
DE3560150D1 (en) 1987-06-04
US4829965A (en) 1989-05-16

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