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EP2321521A1 - Injecteur de carburant destiné à être disposé sur une chambre de combustion d'un moteur à combustion interne - Google Patents

Injecteur de carburant destiné à être disposé sur une chambre de combustion d'un moteur à combustion interne

Info

Publication number
EP2321521A1
EP2321521A1 EP09779830A EP09779830A EP2321521A1 EP 2321521 A1 EP2321521 A1 EP 2321521A1 EP 09779830 A EP09779830 A EP 09779830A EP 09779830 A EP09779830 A EP 09779830A EP 2321521 A1 EP2321521 A1 EP 2321521A1
Authority
EP
European Patent Office
Prior art keywords
nozzle
combustion chamber
sealing element
fuel injection
injection valve
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
EP09779830A
Other languages
German (de)
English (en)
Other versions
EP2321521B1 (fr
Inventor
Thomas Hofmann
Michael HÄRTEL
Uwe Leuteritz
Ferdinand Löbbering
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.)
Continental Automotive GmbH
Original Assignee
Continental Automotive 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 Continental Automotive GmbH filed Critical Continental Automotive GmbH
Publication of EP2321521A1 publication Critical patent/EP2321521A1/fr
Application granted granted Critical
Publication of EP2321521B1 publication Critical patent/EP2321521B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • 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
    • F02M2200/85—Mounting of fuel injection apparatus
    • F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine

Definitions

  • Fuel injection valve for arrangement on a combustion chamber of an internal combustion engine
  • the invention relates to a fuel injection valve for arranging on a combustion chamber of an internal combustion engine comprising a nozzle holder, on which a nozzle body clamped by a nozzle clamping nut, designed to protrude into the combustion chamber, is arranged to receive a nozzle needle, and at least one annular disk-shaped sealing element faces one of the nozzle retaining nut upper bearing surface and a combustion chamber facing the lower bearing surface, which surrounds the nozzle body and serves to seal the nozzle holder relative to the combustion chamber.
  • a nozzle retaining nut holds the two main components of the Kraftstoffin injector - an injector and a valve body - firmly together.
  • the injection nozzle protrudes in the mounted state of the fuel injector in the cylinder head into a combustion chamber of an automobile engine, wherein the valve body arranged above actuates the injection nozzle. In this case, it is necessary to seal the fuel injector with respect to the combustion chamber on the cylinder head. This is done by a corresponding design of the nozzle retaining nut, which cooperates with a corresponding device, a sealing seat in the cylinder head.
  • the injector is sealed to the combustion chamber with a metal washer. This seal is necessary because of the hot exhaust gases and the pressure loss in the cylinder. Due to the high combustion temperatures and high cylinder pressures, sealing is only possible with a metal sealing disk so that combustion gases can not flow directly past the injector and into the environment.
  • a nozzle retaining nut has a frustoconical region at a free end, which can be inserted into a corresponding frustoconical injector bore section.
  • a circumferential angle difference of 2 ° to a maximum of 5 ° exists between the truncated cone on the nozzle retaining nut and the truncated conical bore in the cylinder head.
  • FIG. 1 shows a nozzle body clamped over a nozzle retaining nut as known in the prior art
  • FIG. 2 shows the arrangement according to FIG. 1 with a first additional, separate seal according to the invention
  • Figure 2a a partial section A of Figure 2; 200807306
  • FIG. 3 shows a section corresponding to FIG. 2A with a second variant of the additional separate seal according to the invention
  • FIG. 4 shows a section corresponding to FIG. 2a with a third variant of the additional, separate seal according to the invention
  • FIG. 5 shows a section corresponding to FIG. 2a with a fourth variant of the additional separate seal according to the invention
  • FIG. 9 shows a section corresponding to FIG. 2A with a geometric modification of the nozzle retaining nut.
  • FIG. 1 shows, partially in longitudinal section, a section of a fuel injection valve 10 with a nozzle retaining nut 20, which clamps a nozzle body 30.
  • Schematically indicated at 40 is a combustion chamber in which the nozzle body 30 partially protrudes.
  • a combustion chamber sealing element 50 is arranged at the interface nozzle tension nut 20, nozzle body 30 and combustion chamber 40.
  • the combustion chamber sealing element 50 encompasses the part of the nozzle body 30 protruding beyond the nozzle clamping nut 20.
  • the nozzle body 30 has a circular or annular cross-section in the longitudinal direction, that is to say in the injection direction.
  • the combustion chamber sealing element 50 likewise has a corresponding annular cross section in the longitudinal direction.
  • the outer diameter of the nozzle body cross section corresponds approximately to the inner diameter of the recess of the combustion chamber sealing element 50 (annular recess).
  • the combustion chamber sealing element 50 has two end faces or bearing surfaces, an upper bearing surface 60, which faces the nozzle retaining nut 20, and a lower bearing surface 70, which faces the combustion chamber 40. 200807306
  • FIG. 2 shows, in a longitudinal section, a corresponding cutout according to FIG. 1, wherein a further sealing element 80 is provided.
  • This sealing element engages around the nozzle body 30 in the region of a shoulder 90 of the nozzle body 30 in the contact area of the nozzle retaining nut 20 and the combustion chamber sealing element 50.
  • the sealing element 80 may be formed as a separate ring element, which consists of very soft metals, heat-resistant polymers or other fuel-resistant materials.
  • the inner diameter of this annular sealing element 50 corresponds approximately to the outer diameter of the nozzle body 30 so that it can be applied to the latter from the combustion chamber end of the nozzle body.
  • FIG. 2A shows the enlarged area A from FIG. 2. It can be seen that the sealing element 80 comes into abutment with the nozzle body 30 of the nozzle retaining nut 20 and the combustion chamber sealing element 50 in the assembled state of the fuel injection valve.
  • FIG. 3 shows the same section as FIG. 2a, wherein the sealing element 180 is formed here by vulcanising a sealing area onto the nozzle clamping nut 20.
  • the vulcanization of the sealing element 180 takes place before mounting the combustion chamber sealing element 50.
  • the sealing element 180 can be seen in FIG. 3 only in contact with the nozzle body 30 and the nozzle retaining nut 20. A contact in the fully assembled state also with the combustion chamber sealing element 50 is not excluded.
  • FIG. 4 likewise shows the section corresponding to that of FIG. 2A.
  • a sealing member 280 is formed by the scorching.
  • vulcanization of the sealing element 280 takes place on the combustion chamber sealing element 50, namely in the region between the outer circumference of the nozzle body and in the inner circumference of the combustion chamber sealing element 50. 200807306
  • FIG. 5 also shows the section of the fuel injection valve corresponding to FIG. 2A.
  • the gap formed by the shoulder of the nozzle body 30, the nozzle lock nut 20, and the combustion chamber seal member 50 is filled with a heat-resistant potting compound as the seal member 380.
  • This potting compound is introduced after the screwing of the nozzle retaining nut 20 with the nozzle body 30. As a result, the seal member 380 abuts the nozzle body 30 and the nozzle lock nut 20.
  • FIGS. 6 to 8 show examples in which a further additional seal is formed by a geometric modification of the combustion chamber sealing element 150, 250, 350 in order to seal against deposits due to unburned mixture and exhaust gases in the gap between the nozzle retaining nut 20 and the nozzle body 30.
  • FIG. 6 shows an annular disk-shaped combustion chamber sealing element 150 which, in the region of its inner diameter, has a tongue 100 which is formed longitudinally in the axial direction toward the combustion chamber and radially inward. This tongue 100 is in the cross section of the combustion chamber sealing member 150 tapering radially inwardly below (in the direction of the combustion chamber 40) formed so far that a sealing contact with thetician lovedsf pool of the nozzle body 30 is made.
  • FIG. 7 likewise shows an annular disk-shaped combustion chamber sealing element 250 with a tongue 200, which is formed in the axial direction of the fuel injection valve away from the combustion chamber 40.
  • the tongue 200 extends in a pointed manner in cross-section of the combustion chamber sealing element 250 and forms a sealing contact with the nozzle body 30 in the region of the shoulder 90 of the nozzle body 30.
  • combustion chamber sealing element 350 tapers uniformly radially inwards and extends in cross-section to taper to the outer diameter of the nozzle body and forms a sealing contact therewith. The sealing takes place 200807306
  • a tongue 300 which is rectangular in cross section, of the combustion chamber sealing element 350.
  • FIG. 9 shows a sealing element 400 which is formed by a radially inwardly projecting tongue on the nozzle retaining nut 120.
  • the nozzle retaining nut 120 has at its region adjacent to the combustion chamber sealing element 50 an extension 400 which protrudes radially inwards to such an extent that it comes into sealing contact with the nozzle body 30 in the region of the shoulder 90.
  • the tongue 400 is shown tapered in the present case, but may also have a different cross-sectional shape thereof.

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 injecteur de carburant destiné à être disposé sur une chambre de combustion (40) d'un moteur à combustion interne, comportant un support de buse sur lequel est disposé un corps de buse (30) fixé au moyen d'un écrou de serrage de buse (20), destiné à recevoir une aiguille de buse, conçu pour faire saillie dans la chambre de combustion (40); et au moins un joint de chambre de combustion (50) en forme d'anneau, présentant une surface d'appui supérieure (60) orientée vers l'écrou de serrage de buse (20), et une surface d'appui inférieure (70) orientée vers la chambre de combustion (40), entourant le corps de buse (30) et servant à étancher le support de buse par rapport à la chambre de combustion (40). L'invention est caractérisée en ce qu'au moins un joint supplémentaire (80) est prévu pour étancher le corps de buse (30) dans la zone de l'écrou de serrage de buse (20).
EP09779830.0A 2008-08-05 2009-06-18 Injecteur de carburant destiné à être disposé sur une chambre de combustion d'un moteur à combustion interne Active EP2321521B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102008036413A DE102008036413A1 (de) 2008-08-05 2008-08-05 Kraftstoffeinspritzventil zur Anordnung an einem Brennraum einer Brennkraftmaschine
PCT/EP2009/057590 WO2010015454A1 (fr) 2008-08-05 2009-06-18 Injecteur de carburant destiné à être disposé sur une chambre de combustion d'un moteur à combustion interne

Publications (2)

Publication Number Publication Date
EP2321521A1 true EP2321521A1 (fr) 2011-05-18
EP2321521B1 EP2321521B1 (fr) 2014-11-05

Family

ID=41137775

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09779830.0A Active EP2321521B1 (fr) 2008-08-05 2009-06-18 Injecteur de carburant destiné à être disposé sur une chambre de combustion d'un moteur à combustion interne

Country Status (5)

Country Link
US (1) US8528524B2 (fr)
EP (1) EP2321521B1 (fr)
CN (1) CN102112726B (fr)
DE (1) DE102008036413A1 (fr)
WO (1) WO2010015454A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009000285A1 (de) * 2009-01-19 2010-07-22 Robert Bosch Gmbh Kraftstoff-Injektor sowie Brennkraftmaschine mit Kraftstoff-Injektor
JP5270714B2 (ja) * 2011-04-27 2013-08-21 トヨタ自動車株式会社 燃料噴射弁用制振インシュレータ
US9410520B2 (en) * 2013-08-08 2016-08-09 Cummins Inc. Internal combustion engine including an injector combustion seal positioned between a fuel injector and an engine body
US10036355B2 (en) * 2013-08-08 2018-07-31 Cummins Inc. Heat transferring fuel injector combustion seal with load bearing capability
DE102014225976A1 (de) * 2014-12-16 2016-06-16 Robert Bosch Gmbh Brennstoffeinspritzvorrichtung
US11174825B2 (en) * 2019-02-11 2021-11-16 Caterpillar Inc. Seal configuration for fuel injector
US10746145B1 (en) * 2019-05-08 2020-08-18 Delphi Technologies Ip Limited Isolator for fuel injector

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1262164A (en) 1969-06-07 1972-02-02 Gkn Floform Ltd Fuel injector sleeve for a diesel engine
US3695235A (en) 1970-08-26 1972-10-03 Mcculloch Corp Heat seal for fuel injection nozzles
US5330100A (en) * 1992-01-27 1994-07-19 Igor Malinowski Ultrasonic fuel injector
DE19807819C1 (de) * 1998-02-26 1999-05-12 Mtu Friedrichshafen Gmbh Verfahren zur brennraumseitigen Abdichtung eines Einspritzventils einer Brennkraftmaschine
JP4067237B2 (ja) * 1999-05-27 2008-03-26 ヤマハマリン株式会社 筒内噴射式エンジン
DE10027662A1 (de) 2000-06-03 2001-12-06 Bosch Gmbh Robert Dichtmittel und Niederhalter für ein Brennstoffeinspritzventil
DE10102192B4 (de) 2001-01-16 2012-12-13 Volkswagen Ag Vorrichtung zur Halterung von Einspritzelementen im Zylinderkopf einer Brennkraftmaschine
DE102004049277A1 (de) 2004-10-09 2006-04-13 Robert Bosch Gmbh Dämpfungselement für ein Brennstoffeinspritzventil
CN100334344C (zh) 2005-01-26 2007-08-29 周书田 多喷孔铅笔型喷油器
DE102005053112A1 (de) * 2005-11-08 2007-05-10 Robert Bosch Gmbh Kraftstoffeinspritzventil mit Sicherung für ein Ventil-Brennraum-Dichtelement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2010015454A1 *

Also Published As

Publication number Publication date
US20110132329A1 (en) 2011-06-09
EP2321521B1 (fr) 2014-11-05
US8528524B2 (en) 2013-09-10
CN102112726B (zh) 2017-03-01
WO2010015454A1 (fr) 2010-02-11
CN102112726A (zh) 2011-06-29
DE102008036413A1 (de) 2010-02-18

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