EP2718558B1 - Soupape d'injection pour moteurs à combustion interne - Google Patents

Soupape d'injection pour moteurs à combustion interne Download PDF

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Publication number
EP2718558B1
EP2718558B1 EP12716423.4A EP12716423A EP2718558B1 EP 2718558 B1 EP2718558 B1 EP 2718558B1 EP 12716423 A EP12716423 A EP 12716423A EP 2718558 B1 EP2718558 B1 EP 2718558B1
Authority
EP
European Patent Office
Prior art keywords
hole
valve seat
valve
section
seat 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.)
Not-in-force
Application number
EP12716423.4A
Other languages
German (de)
English (en)
Other versions
EP2718558A1 (fr
Inventor
Marco Vorbach
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.)
Robert Bosch GmbH
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 EP2718558A1 publication Critical patent/EP2718558A1/fr
Application granted granted Critical
Publication of EP2718558B1 publication Critical patent/EP2718558B1/fr
Not-in-force legal-status Critical Current
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
    • F02M69/00—Low-pressure fuel-injection apparatus ; Apparatus with both continuous and intermittent injection; Apparatus injecting different types of fuel
    • F02M69/04—Injectors peculiar thereto
    • 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
    • F02M61/166—Selection of particular materials
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1846—Dimensional characteristics of discharge orifices
    • 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
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/188—Spherical or partly spherical shaped valve member ends

Definitions

  • the invention relates to an injection valve for internal combustion engines according to the preamble of claim 1.
  • Multi-hole injection valve fuel injection valve for internal combustion engines ( DE 10 2005 036 951 A1 ) has a valve seat body closing a hollow cylindrical valve seat carrier which delimits a valve chamber connected to a fuel supply.
  • a valve seat in the form of an axis of the valve seat body concentrically enclosing annular surface and a plurality of spray holes are formed.
  • the valve seat forms with a closing body of a valve seat carrier axially displaceably arranged valve member a final injection ports sealing seat. The valve member is acted upon by a closing head on the valve seat aufpressenden valve closing spring.
  • Each of the plurality of spray holes has an upstream, small cross-section hole inlet portion with a hole inlet opening and a downstream, larger cross-sectional hole exit portion with a hole outlet opening.
  • the hole inlet openings of all injection holes lie within the valve seat forming annular surface on the valve body and the hole outlet openings of all the injection holes in the side facing away from the valve chamber, convex outer body wall of the valve seat body.
  • the injection valve according to the invention with the features of claim 1 has the advantage that air can flow from the outside into the hole outlet sections through the groove connecting all hole exit sections of the injection holes, so that a sufficient ventilation is provided and thus the pressure conditions in the hole exit sections are positively changed.
  • the valve closing phase no negative pressure is now generated in the hole outlet sections by the emerging wake flow, which pulls the fuel film built up during the injection phase on the wall surfaces of the hole outlet sections in the direction of hole outlet openings.
  • the escape of the fuel film from the hole outlet openings is suppressed, and the deposits resulting from the engine combustion do not occur at the sputtering-critical hole outlet openings, but in the interior of the hole outlet sections and are therefore no longer relevant to exhaust gas.
  • the soot emission of the internal combustion engine can be kept largely constant over its lifetime and avoided with increasing life so far accompanying increase in soot emissions in the exhaust gas.
  • An injection valve for internal combustion engines is already known, which is designed with a sealing seat formed by a valve seat and a closing head of a valve member.
  • the injection valve has a plurality of injection holes arranged downstream of the sealing seat, each having at least one upstream hole entry section with the smallest hole cross section and a hole inlet opening and a downstream hole exit section with the largest hole cross section and a hole outlet opening, wherein the injection holes have a constant diameter over their entire length, so that the smallest hole cross section and the largest hole cross section are the same.
  • the hole exit sections of the injection holes open into a groove introduced on the nozzle body, which has a larger opening width than the hole exit sections of the injection holes.
  • the groove width is smaller than the diameter of the hole outlet openings.
  • the hole outlet openings are arranged on a divider circle and connecting the hole outlet openings groove formed annular.
  • FIG. 1 partially with its discharge-side end in longitudinal section schematically sketched injection valve for injecting fuel into a combustion cylinder of an internal combustion engine has a sleeve-shaped valve seat support 11 which protrudes from a valve housing, not shown here and is closed at its free end with a valve seat body 12.
  • a valve seat 14 in the form of an annular surface concentric with the axis of the valve seat body 12 is formed on the inner wall of the valve seat body 12 delimiting a valve chamber 13 and forms a so-called sealing seat together with a closing head 15 of a valve member 16 axially displaceable in the valve seat carrier 12.
  • the closing head 15 is attached to the front end of a hollow cylindrical valve needle 17 of the valve member 16, z. B. welded.
  • the valve needle 17 has radial bores 18 and communicates with a fuel inlet, not shown here, formed in the valve housing, so that fuel from the fuel inlet via the valve needle 17 and the radial bores 18 passes into the valve chamber 13 and there is under pressure at the sealing seat.
  • a valve closing spring 19 and an actuator 20, which in FIG. 1 are indicated schematically.
  • the actuator 20 is z. B. an electromagnet.
  • the valve closing spring 19 presses the closing head 15 onto the valve seat 14. By means of the electromagnetic actuator 20 of the closing head 15 is lifted against the restoring force of the valve closing spring 19 from the valve seat 14 more or less.
  • spray holes 21 are arranged in the valve seat body, each having at least two stepped in cross-section hole portions, namely an upstream hole inlet portion 22 with the smallest hole cross section and a hole inlet opening 221 and a downstream hole exit portion 23 with the largest hole cross-section and a hole outlet opening 231.
  • upstream Locheinbergsabites 22 with the smallest hole cross-section and downstream hole exit section 23 with the largest hole cross-section further, with increasing cross-section stepped hole sections may be present.
  • All hole inlet openings 221 on the one hand and all hole outlet openings 231 on the other hand lie on a pitch circle in mutually parallel planes which extend transversely to the axis of the valve seat body 12.
  • the hole inlet openings 221 of the hole inlet sections 22 lie in the valve body 13 delimiting the inner body wall of the valve seat body 12, in one of the trained as an annular surface valve seat 14, central zone of the inner body wall of the valve seat body 12, and the hole outlet openings 231 of the hole exit sections 23rd lie in the remote from the valve chamber 13, outer body wall of the valve seat body 12, in a dome-shaped here, central region of the valve seat body 12.
  • a trough-shaped recess 24 is formed, in which the hole inlet openings 221 lie.
  • the injection holes 21 are aligned in the valve seat body 12 so that their hole axes are inclined at an injection angle to the axis of the valve seat body 12.
  • a groove 25 is incorporated into the remote from the valve chamber 13 outer wall of the valve seat body 12 so that it passes with downstream groove opening through all hole exit sections 23 and so all hole exit sections 23 of the injection holes 21 interconnects.
  • the groove 25 is formed annularly for this purpose.
  • the groove width is smaller than the diameter of the hole outlet openings 231.

Landscapes

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

Claims (8)

  1. Soupape d'injection pour moteurs à combustion interne, comprenant un siège d'étanchéité formé par un siège de soupape (14) et une tête de fermeture (15) d'un organe de soupape (16), et comprenant plusieurs trous d'injection (21) disposés en aval du siège d'étanchéité, lesquels présentent à chaque fois au moins une portion d'entrée de trou amont (22) avec une section transversale de trou la plus petite et une ouverture d'entrée de trou (221), et une portion de sortie de trou aval (23) avec une section transversale de trou la plus grande et une ouverture de sortie de trou (231), caractérisée en ce qu'entre la portion d'entrée de trou amont (22) ayant la section transversale de trou la plus petite et la section de sortie de trou aval (23) ayant la section transversale de trou la plus grande des trous d'injection (21), est prévu au moins un gradin de telle sorte que la section transversale de trou la plus grande soit supérieure à la section transversale de trou la plus petite et que les portions de sortie de trou (23) soient connectées les unes aux autres par le biais d'une rainure (25) avec une ouverture de rainure orientée vers l'aval.
  2. Soupape d'injection selon la revendication 1, caractérisée en ce que la largeur de rainure est inférieure au diamètre de trou des ouvertures de sortie de trou (231).
  3. Soupape d'injection selon la revendication 1 ou 2, caractérisée en ce que le siège de soupape (14), les trous d'injection (21) et la rainure (25) sont disposés dans un corps de siège de soupape (12) fermant vers l'aval une chambre de soupape (13) de telle sorte que le siège de soupape (14) soit réalisé de manière concentrique à l'axe du corps de siège de soupape (12) au niveau d'une paroi de corps intérieure du corps de siège de soupape (12) délimitant la chambre de soupape (13) et que les ouvertures d'entrée de trou (221) des portions d'entrée de trou (22) soient situées dans une zone de la paroi de corps intérieure entourée par le siège de soupape (14) et que les ouvertures de sortie de trou (231) des portions de sortie de trou (23) soient situées dans la paroi de corps extérieure du corps de siège de soupape (12) opposée à la chambre de soupape (13).
  4. Soupape d'injection selon la revendication 3, caractérisée en ce que les ouvertures d'entrée de trou (221) de toutes les portions d'entrée de trou (22) des trous d'injection (21) sont situées dans un renfoncement en forme de creux (24) qui est réalisé dans la zone de la paroi de corps intérieure du corps de siège de soupape (12) entourée par le siège de soupape (14).
  5. Soupape d'injection selon la revendication 3 ou 4, caractérisée en ce que les ouvertures de sortie de trou (231) de toutes les portions de sortie de trou (23) des trous d'injection (21) sont disposées sur un cercle diviseur concentrique à l'axe du corps de siège de soupape (12) et la rainure (25) est réalisée sous forme annulaire circulaire.
  6. Soupape d'injection selon l'une quelconque des revendications 3 à 5, caractérisée en ce que les trous d'injection (19) dans le corps de siège de soupape (12) sont orientés de telle sorte que leurs axes de trou soient inclinés suivant un angle aigu par rapport à l'axe du corps de siège de soupape (12).
  7. Soupape d'injection selon l'une quelconque des revendications 3 à 6, caractérisée en ce que le corps de siège de soupape (12) est fixé de manière étanche aux fluides au niveau d'un support de siège de soupape (11) et l'organe de soupape (16) est disposé de manière déplaçable axialement dans le support de siège de soupape (11) et peut être actionné au moyen d'un actionneur.
  8. Soupape d'injection selon l'une quelconque des revendications 3 à 7, caractérisée en ce que le corps de siège de soupape (12) est fabriqué par moulage par injection de poudre métallique.
EP12716423.4A 2011-06-09 2012-04-24 Soupape d'injection pour moteurs à combustion interne Not-in-force EP2718558B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011077268A DE102011077268A1 (de) 2011-06-09 2011-06-09 Einspritzventil für Brennkraftmaschinen
PCT/EP2012/057466 WO2012167990A1 (fr) 2011-06-09 2012-04-24 Soupape d'injection pour moteurs à combustion interne

Publications (2)

Publication Number Publication Date
EP2718558A1 EP2718558A1 (fr) 2014-04-16
EP2718558B1 true EP2718558B1 (fr) 2016-06-08

Family

ID=46001268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12716423.4A Not-in-force EP2718558B1 (fr) 2011-06-09 2012-04-24 Soupape d'injection pour moteurs à combustion interne

Country Status (6)

Country Link
US (1) US20140224214A1 (fr)
EP (1) EP2718558B1 (fr)
JP (1) JP2014518986A (fr)
CN (1) CN103582753A (fr)
DE (1) DE102011077268A1 (fr)
WO (1) WO2012167990A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5959892B2 (ja) 2012-03-26 2016-08-02 日立オートモティブシステムズ株式会社 火花点火式燃料噴射弁
US20150211458A1 (en) * 2012-08-01 2015-07-30 3M Innovative Properties Company Targeting of fuel output by off-axis directing of nozzle output streams
DE102014213101A1 (de) * 2014-07-07 2016-01-07 Robert Bosch Gmbh Ventilbauteil für ein Einspritzventil, Einspritzventil und Verfahren zur Herstellung eines Ventilbauteils für ein Einspritzventil
US9790906B2 (en) * 2014-08-15 2017-10-17 Continental Automotive Systems, Inc. High pressure gasoline injector seat to reduce particle emissions
JP6023151B2 (ja) * 2014-11-07 2016-11-09 トヨタ自動車株式会社 燃料噴射弁
DE102018218678A1 (de) * 2018-10-31 2020-04-30 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
FR2528915B1 (fr) * 1982-06-18 1986-04-18 Semt Injecteur de combustible et moteur a combustion interne equipe dudit injecteur
JPH0351172U (fr) * 1989-09-25 1991-05-17
DE10118163B4 (de) * 2001-04-11 2007-04-19 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10204656A1 (de) * 2002-02-05 2003-09-25 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10219608A1 (de) * 2002-05-02 2003-11-20 Bosch Gmbh Robert Kraftstoffeinspritzventil für Brennkraftmaschinen
DE10319694A1 (de) * 2003-05-02 2004-12-02 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10361762A1 (de) * 2003-12-29 2005-07-28 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102005036950A1 (de) * 2005-08-05 2007-02-08 Robert Bosch Gmbh Verfahren zur Herstellung eines metallischen Bauteils und metallisches Bauteil, insbesondere Ventilsitzbauteil
DE102005036951A1 (de) * 2005-08-05 2007-02-08 Robert Bosch Gmbh Brennstoffeinspritzventil und Verfahren zur Ausformung von Abspritzöffnungen
DE102007051408A1 (de) * 2007-10-25 2009-05-28 Prelatec Gmbh Verfahren zum Bohren von Löchern definierter Geometrien mittels Laserstrahlung
JP4627783B2 (ja) * 2008-03-31 2011-02-09 日立オートモティブシステムズ株式会社 燃料噴射弁及びオリフィスの加工方法
JP5277056B2 (ja) * 2009-04-10 2013-08-28 日立オートモティブシステムズ株式会社 燃料噴射弁
WO2010121767A1 (fr) * 2009-04-20 2010-10-28 Prelatec Gmbh Buse présentant au moins un trou d'injection pour la pulvérisation de fluides

Non-Patent Citations (1)

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Title
None *

Also Published As

Publication number Publication date
JP2014518986A (ja) 2014-08-07
US20140224214A1 (en) 2014-08-14
EP2718558A1 (fr) 2014-04-16
DE102011077268A1 (de) 2012-12-13
CN103582753A (zh) 2014-02-12
WO2012167990A1 (fr) 2012-12-13

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