EP2080893B1 - Ensemble de soupape pour soupape d'injection et soupape d'injection - Google Patents

Ensemble de soupape pour soupape d'injection et soupape d'injection Download PDF

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Publication number
EP2080893B1
EP2080893B1 EP20080000959 EP08000959A EP2080893B1 EP 2080893 B1 EP2080893 B1 EP 2080893B1 EP 20080000959 EP20080000959 EP 20080000959 EP 08000959 A EP08000959 A EP 08000959A EP 2080893 B1 EP2080893 B1 EP 2080893B1
Authority
EP
European Patent Office
Prior art keywords
projection
valve
cylinder head
injection
valve body
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.)
Active
Application number
EP20080000959
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German (de)
English (en)
Other versions
EP2080893A1 (fr
Inventor
Luca Matteucci
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
Priority to DE200860003515 priority Critical patent/DE602008003515D1/de
Priority to EP20080000959 priority patent/EP2080893B1/fr
Publication of EP2080893A1 publication Critical patent/EP2080893A1/fr
Application granted granted Critical
Publication of EP2080893B1 publication Critical patent/EP2080893B1/fr
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Anticipated expiration legal-status Critical

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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
    • 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
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • 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

  • the invention relates to a valve assembly for an injection valve and an injection valve.
  • Injection valves are in wide spread use, in particular for internal combustion engines where they may be arranged in order to dose fuel into an intake manifold of the internal combustion engine or directly into the combustion chamber of a cylinder of the internal combustion engine.
  • Fuel can be supplied to the internal combustion engine by the injection valve that comprises the sealing arrangement.
  • the injection valves can be coupled to the cylinder head of the internal combustion engine in different manners.
  • the coupling of the injection valves to the cylinder head needs to be very precise to get a correct injection angle.
  • DE 101 03 933 discloses a fuel injection valve for fuel injection systems of internal combustion engines, comprising a nozzle body at whose downstream end at least one injection opening is disposed and on which a sealing element is disposed that seals the valve from an adjoining component. At least one peripheral sealing collar is provided on the nozzle body as the sealing element and interacts with the adjoining component to give a press fit.
  • the object of the invention is to create a valve assembly for an injection valve being coupable to a cylinder head of a combustion engine which is simply to be manufactured and which facilitates a reliable and precise coupling between the valve assembly and the cylinder head of the combustion engine.
  • the invention is distinguished by a valve assembly for an injection valve.
  • the valve assembly comprises a valve body with a central longitudinal axis, an injection nozzle, and a sealing arrangement which is designed to sealingly couple the valve assembly with a cylinder head of a combustion engine.
  • the sealing arrangement comprises a first projection being in one piece with the valve body and being designed to be arranged between the valve body and the cylinder head, and a second projection being in one piece with the valve body and being designed to be arranged between the valve body and the cylinder head and being arranged in a given distance from the first projection in direction of the central longitudinal axis facing away from the injection nozzle.
  • the first projection and the second projection have a circular shape, and the first projection extends to a first radius and the second projection extends to a second radius. The second radius is bigger than the first radius.
  • valve assembly has a groove which is arranged between the first projection and the second projection.
  • the groove can take up sections of a gasket which can be arranged radially outside the first projection and the second projection in particular in the case of a thermal expansion of the gasket.
  • the invention is distinguished by an injection valve comprising a valve assembly.
  • Figure 1 shows an internal combustion engine 22, with an intake air tract 10, a motor block 12, a cylinder head 14 and an exhaust gas tract 16.
  • a combustion chamber 20 is arranged in the motor block 12 .
  • the cylinder head 14 comprises an injection valve 18 and a sparking plug 19.
  • a sealing arrangement 30 enables the sealing of the injection valve 18 in the cylinder head 14 of the combustion engine 22.
  • the fuel injector 18 ( figures 2 ) comprises an injector coupling portion 23 and a valve assembly 24.
  • the injector coupling portion 23 is designed to be coupled to a high-pressure fuel chamber of the internal combustion engine 22, the fuel is stored under high pressure, for example, under the pressure of about 200 bar in the case of a gasoline engine or of about 2,000 bar in the case of a diesel engine.
  • injection valve 18 is designed to be coupled to an electrical supply to actuate a not shown actuator unit of the injection valve 18.
  • the valve assembly 24 comprises a valve body 26 with a central longitudinal axis L and a cavity 27 which is axially led through the valve body 26 ( figure 3 ).
  • the valve assembly 24 further comprises a not shown valve needle taken in the cavity 27 of the valve body 26.
  • the valve body 26 has a valve body groove 36 wherein a first projection 32 and a second projection 34 are arranged.
  • the first projection 32 and the second projection 34 are part of the sealing arrangement 30.
  • the first projection 32 and the second projection 34 are in one piece with the valve body 26.
  • the first projection 32 and the second projection 34 are forming parts of the valve body 26 and are arranged between the valve body 26 and the cylinder head 14.
  • the first projection 32 and the second projection 34 are preferably designed to be arranged circumferentially over the valve body 26.
  • the first projection 32 and the second projection 34 have a circular shape. Consequently, the first projection 32 and the second projection 34 are forming ring elements with their centres on the central longitudinal axis L.
  • the first projection 32 and the second projection 34 are arranged in a predetermined distance D from each other in direction of the central longitudinal axis L.
  • the second projection 34 is arranged in a larger distance from the injection nozzle 28 as the first projection 32.
  • a groove 38 is arranged between the first projection 32 and the second projection 34 .
  • the recess 15 of the cylinder head 14 and the valve body groove 36 take up a gasket 40 which is arranged between the projections 32, 34 of the valve body 26 and an inner wall 42 of the recess 15 of the cylinder head 14.
  • the gasket 40 is of a material which comprises PTFE which is suited to the temperatures usually occurring in the internal combustion engine 22.
  • the gasket 40 comprises particles of carbon.
  • the first projection 32 has a first radius R1 and the second projection 34 has a second radius R2 relative to the central longitudinal axis L.
  • the second radius R2 is bigger than the first radius R1.
  • first projection 32 and the second projection 34 together with the gasket 40 act as a sealing arrangement to prevent hot exhaust gases in the combustion chamber 20 to exit through the recess 15 in the cylinder head 14 which takes up the injection valve 18.
  • the second projection 34 together with the gasket 40 is able to prevent the hot exhaust gases of the combustion chamber 20 to leave the combustion chamber 20 through the recess 15 in the cylinder head 14.
  • the groove 38 which is arranged between the first projection 32 and the second projection 34 can take up parts of the gasket 40 in the case of a thermal expansion of the gasket 40. By this, a further sealing function of the first projection 32 and the second projection 34 together with the gasket 40 is possible.
  • the contact pressure between the second projection 34 and the gasket 40 is high.
  • the contact pressure between the second projection 34 and the gasket 40 is very high in the case of the thermal expansion of the gasket 40. This makes it possible to obtain a good sealing function between the valve body 26 and the cylinder head 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cylinder Crankcases Of Internal Combustion Engines (AREA)

Claims (3)

  1. Ensemble de soupape (24) pour une soupape d'injection (18), comprenant :
    un corps de soupape (26) avec un axe longitudinal central (L),
    une buse d'injection (28), et
    un agencement d'étanchéité (30) qui est conçu pour coupler de manière étanche l'ensemble de soupape (24) avec une culasse (14) d'un moteur à combustion (22), l'agencement d'étanchéité (30) comprenant :
    une première saillie (32) qui est réalisée d'un seul tenant avec le corps de soupape (26) et qui est conçue pour être agencée entre le corps de soupape (26) et la culasse (14), et
    une deuxième saillie (34) qui est réalisée d'un seul tenant avec le corps de soupape (26) et qui est conçue pour être agencée entre le corps de soupape (26) et la culasse (14) et qui est agencée à une distance donnée (D) de la première saillie (32) dans la direction de l'axe longitudinal central (L) tourné à l'opposé de la buse d'injection (28), avec :
    la première saillie (32) et la deuxième saillie (34) ayant une forme circulaire,
    la première saillie (32) s'étendant sur un premier rayon (R1) et la deuxième saillie (34) s'étendant sur un deuxième rayon (R2), dans lequel :
    le deuxième rayon (R2) est plus grand que le premier rayon (R1).
  2. Ensemble de soupape (24) selon la revendication 1, avec une rainure (38) qui est agencée entre la première saillie (32) et la deuxième saillie (34).
  3. Soupape d'injection (18) comprenant un ensemble de soupape (24) selon l'une quelconque des revendications précédentes.
EP20080000959 2008-01-18 2008-01-18 Ensemble de soupape pour soupape d'injection et soupape d'injection Active EP2080893B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE200860003515 DE602008003515D1 (de) 2008-01-18 2008-01-18 Ventilanordnung für ein Einspritzventil und Einspritzventil
EP20080000959 EP2080893B1 (fr) 2008-01-18 2008-01-18 Ensemble de soupape pour soupape d'injection et soupape d'injection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20080000959 EP2080893B1 (fr) 2008-01-18 2008-01-18 Ensemble de soupape pour soupape d'injection et soupape d'injection

Publications (2)

Publication Number Publication Date
EP2080893A1 EP2080893A1 (fr) 2009-07-22
EP2080893B1 true EP2080893B1 (fr) 2010-11-17

Family

ID=39537868

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20080000959 Active EP2080893B1 (fr) 2008-01-18 2008-01-18 Ensemble de soupape pour soupape d'injection et soupape d'injection

Country Status (2)

Country Link
EP (1) EP2080893B1 (fr)
DE (1) DE602008003515D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2607679B1 (fr) * 2011-12-21 2015-02-25 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
DE102012209353B4 (de) 2012-06-04 2018-12-06 Continental Automotive Gmbh Prüfvorrichtung zum Testen einer Flachbaugruppe
JP5831510B2 (ja) 2012-11-20 2015-12-09 株式会社デンソー 燃料噴射弁および燃料噴射弁の取付方法
JP5910586B2 (ja) 2013-08-23 2016-04-27 株式会社デンソー 燃料噴射弁
DE102017216147A1 (de) * 2017-09-13 2019-03-14 Robert Bosch Gmbh Kraftstoffinjektor
US20230349467A1 (en) * 2020-11-20 2023-11-02 Nok Corporation Sealing structure and assembling method of sealing structure

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10038300A1 (de) * 2000-08-05 2002-02-14 Bosch Gmbh Robert Brennstoffeinspritzventil
JP3830896B2 (ja) * 2000-12-26 2006-10-11 トヨタ自動車株式会社 インジェクター用燃焼ガスシール及びこれを備えた密封構造
DE10103933A1 (de) 2001-01-30 2002-08-14 Bosch Gmbh Robert Brennstoffeinspritzventil
JP2004239124A (ja) * 2003-02-05 2004-08-26 Hitachi Ltd 燃料噴射弁及び筒内噴射式エンジン
DE10321163B4 (de) * 2003-05-12 2017-01-05 Robert Bosch Gmbh Verfahren zum Anbringen eines metallischen Dichtelements an einem Grundkörper eines Brennstoffeinspritzventils, sowie Brennstoffeinspritzventil

Also Published As

Publication number Publication date
DE602008003515D1 (de) 2010-12-30
EP2080893A1 (fr) 2009-07-22

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