EP1963659A1 - Injecteur de carburant dote d'un organe de soupape d'injection a actionnement direct - Google Patents

Injecteur de carburant dote d'un organe de soupape d'injection a actionnement direct

Info

Publication number
EP1963659A1
EP1963659A1 EP06807287A EP06807287A EP1963659A1 EP 1963659 A1 EP1963659 A1 EP 1963659A1 EP 06807287 A EP06807287 A EP 06807287A EP 06807287 A EP06807287 A EP 06807287A EP 1963659 A1 EP1963659 A1 EP 1963659A1
Authority
EP
European Patent Office
Prior art keywords
section
control chamber
nozzle needle
fuel injector
nozzle
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
EP06807287A
Other languages
German (de)
English (en)
Other versions
EP1963659B1 (fr
Inventor
Wolfgang Stoecklein
Thomas Pauer
Christian Kuhnert
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 EP1963659A1 publication Critical patent/EP1963659A1/fr
Application granted granted Critical
Publication of EP1963659B1 publication Critical patent/EP1963659B1/fr
Not-in-force 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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/0603—Injectors peculiar thereto with means directly operating the valve needle using piezoelectric or magnetostrictive operating means
    • 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
    • F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
    • F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
    • 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
    • F02M2547/00—Special features for fuel-injection valves actuated by fluid pressure
    • F02M2547/001—Control chambers formed by movable sleeves

Definitions

  • the invention relates to a fuel injector for internal combustion engines after the
  • a fuel injector with a directly actuatable injection valve member and with a single-stage gear ratio of the actuator stroke with a pulling actuator for opening the nozzle needle is described in DE 10 2004 005 452 A1.
  • an actuator-actuated actuator-side coupler piston acts on a coupler space and a coupler piston connected to a nozzle needle onto a control space.
  • the coupler chamber and the control chamber are hydraulically connected via a channel.
  • the channel is in one
  • Inserted intermediate disc which is arranged between an injector body and a nozzle body.
  • Object of the present invention is to provide a compact fuel injector, in which the transmission of the vibrations of Aktorhubs be suppressed to the nozzle needle and still maintain a rapid opening and closing of the nozzle needle.
  • Disclosure of the invention The object of the invention is achieved with a fuel injector having the characterizing features of claim 1.
  • Section with the smaller flow cross-section of the coupler chamber and the portion with the larger flow cross-section facing the control chamber causes the vibrations of the actuator in the translation of Aktorhubs be suppressed to the Düsennadelhub or quickly damped.
  • a particularly expedient embodiment for ensuring a fast stroke translation is when the first section to the coupler space towards a third portion and the second portion to the control chamber towards a fourth section is upstream, and if these two sections have substantially the same flow cross section, which in turn is larger is as the larger flow area of the second section. It is advantageous if the channel is arranged off-center in relation to the central axis of the control chamber in the intermediate disc.
  • a particularly effective damping and rapid hydraulic transmission between the coupler space and the control chamber is achieved when the ratio of the smaller flow cross section of the first portion of the throttle to the cross-sectional area of the control chamber is between 0.05 and 0.1, preferably between 0.075 to 0.08.
  • the intermediate disc has at least one connecting channel, which connects a high pressure connected to the high-pressure connection with the nozzle needle hydraulic space, wherein in the intermediate disc more circularly arranged around the central axis of the control chamber connecting channels are provided.
  • Figure 1 is a sectional view of a combustion chamber side portion of a fuel injector according to the invention
  • Figure 2 shows a Thomas barnwolf an intermediate plate
  • FIG. 3 shows an enlarged detail X of the intermediate plate in FIG. 2.
  • the fuel injector shown in Figure 1 has an injector 10 with an injection valve member which projects with a nozzle body 12 in a combustion chamber of an internal combustion engine.
  • a nozzle needle 13 is guided axially displaceable.
  • a nozzle needle sealing seat 14 is formed at the tip of the nozzle needle 13, which are arranged in the injection direction in the nozzle body 12 and projecting into the combustion chamber injection nozzles 15 downstream.
  • the nozzle needle sealing seat 14 is preceded by a nozzle needle pressure chamber 16 in the injection valve member in the injection direction, to which a nozzle needle-side pressure shoulder 17 formed on the nozzle needle 13 is exposed.
  • the injector housing 10 has a pressure chamber 18 which is connected by a connection 19 to a high-pressure system (not shown), for example to a common-rail system of a diesel injection device.
  • a high-pressure system (not shown), for example to a common-rail system of a diesel injection device.
  • a high-pressure chamber 18 is a piezoelectric
  • Actuator 20 is arranged, which is fixedly connected to an actuator-side coupler piston 21.
  • the actuator-side coupler piston 21 has a guide portion 22 and an annular collar 23.
  • a first slide sleeve 30 is guided axially displaceable, on which a compression spring 25 engages, which is supported on the collar 23 of the actuator-side coupler piston 21.
  • the relatively long piezoelectric actuator 20 does not tilt the coupler piston 21 in the high pressure chamber 18 in its change in length, for example, the slide sleeve 30 is additionally guided with guide surfaces not shown on a guide bore 26 in the axial direction within the injector body 10.
  • an intermediate plate 40 is arranged, which is clamped by means of a clamping nut 41 hydraulically tight.
  • the intermediate plate 40 has, for example, at least two connecting channels 42, via which the high-pressure chamber 18 is hydraulically connected to the nozzle needle pressure chamber 16.
  • the first sliding sleeve 30 presses with a sealing edge 31 against a formed on the throttle plate 40 actuator-side end face 43. This forms within the first - A -
  • a nozzle needle-side coupler piston 34 is formed on which a further slide sleeve 36 is guided axially displaceable.
  • a control chamber 38 is formed, to which the nozzle needle-side coupler piston 34 is exposed with a pressure surface 39.
  • a stroke ratio of the actuator-side coupler piston 21 on the nozzle needle-side coupler piston 34 of greater than one (> 1) it is necessary that the diameter of the actuator-side coupler piston 21 and the pressure surface 27 is greater than the diameter of the nozzle needle-side coupler piston 34 and more
  • the throttle plate 40 Through the throttle plate 40 performs a channel 50 which connects the coupler chamber 32 with the control chamber 38 hydraulically.
  • the channel 50 which is arranged off-center of the central axis 49 of the control chamber 38 in the intermediate plate 40, has a hydraulic
  • Throttle 51 ( Figure 2).
  • the coupler chamber 32 and the control chamber 38 act as translation spaces by the stroke of the actuator-side coupler piston 21 is translated higher due to the larger pressure surface 27 against the smaller pressure surface 39 of the nozzle needle-side coupler piston 34.
  • the serving for translation fuel as a hydraulic medium is transmitted via the channel 50 with the throttle 51.
  • the throttle 51 has a first section 52 with a small flow cross section and a second section 53 with a larger flow cross section, the first one
  • Section 52 with the small flow cross-section of the coupler chamber 32 and the second section 53 with the larger flow cross-section of the control chamber 38 faces.
  • the sections 54 and 55 have substantially the same Flow cross-section, which in turn is greater than the larger flow cross-section of the second portion 53.
  • conical transition 56 is formed between the control chamber 38 associated portion 55 and the second portion 53 of the throttle 51 to the second portion 53 toward tapering.
  • Decide for an effective vibration damping is also the ratio of the diameter or the cross-sectional area of the throttle 51 and the diameter or the cross-sectional area of the control chamber 38. It has been found that the vibration of the nozzle needle 13 is effectively suppressed due to the translation of Aktorhubs when Ratio of the area AD of the smaller flow cross section of the first
  • Section 52 of the throttle 51 to the cross-sectional area AK of the control chamber 38 is between 0.05 and 0.1, preferably 0.075 to 0.08.
  • the injection with the fuel injector is initiated with a pulling piezoelectric actuator 20.
  • a pulling piezoelectric actuator 20 For this purpose, in the closed state of the injectors 15 on the piezo actuator
  • the pulling stroke realized by the actuator-side coupler piston 21 leads to an enlargement of the coupler space 32, as a result of which the pressure in the coupler space 32 drops below the rail pressure or system pressure.
  • the falling pressure in the coupler chamber 32 is transmitted via the channel 50 with the throttle 51 to the control chamber 38, whereby the acting in the nozzle needle pressure chamber 16 on the pressure shoulder 17 rail pressure is higher than the pressure acting on the pressure surface 39 pressure in the control chamber 38. that the pressure surface 39 is smaller than the pressure surface 27, the nozzle needle 13 is lifted from the nozzle needle sealing seat 14 with a larger stroke than the stroke of the piezo actuator 20.
  • Injectors 15 are released, so that via the injectors 15 of the fuel is injected with the voltage applied in the nozzle needle pressure chamber 16 rail pressure or system pressure.
  • the piezo actuator 20 is subjected to a voltage which causes a longitudinal expansion of the piezo actuator 20, whereby the actuator-side coupler piston 21 presses in the coupler chamber 32 and there increases the pressure.
  • the pressure increase is transmitted via the channel 50 and the throttle 51 in the control chamber 38, which acts there on the further pressure surface 39 of the nozzle needle-side coupler piston 35.
  • the nozzle needle 13 is supported by the compression spring 28 again in the nozzle needle sealing seat 14.

Landscapes

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

Abstract

L'invention concerne un injecteur de carburant pour moteur à combustion interne qui présente un organe de soupape d'injection à actionnement direct. L'injecteur de carburant présente un pointeau d'injection (13) guidé axialement dans un corps d'injecteur (12) et un actionneur (20) installé dans un boîtier d'injecteur (10), le pointeau d'injection (13) étant relié à un piston d'accouplement (34) situé du côté du pointeau d'injection et l'actionneur (20) à un piston d'accouplement (21) situé du côté de l'actionneur. Le piston d'accouplement (21) situé du côté de l'actionneur agit sur un espace d'accouplement (32) et le piston d'accouplement (35) situé du côté du pointeau d'injection agit sur une chambre pilote (38). Le pointeau d'injection (13) est relevé d'un siège (14) étanche de pointeau d'injection en fonction de la pression qui règne dans la chambre pilote (38). Entre le boîtier d'injecteur (10) et le corps d'injection (12) est disposée une plaque intermédiaire (40) dotée d'un canal (50) qui relie à écoulement la chambre d'accouplement (32) à la chambre pilote (38). Le canal (50) présente un étranglement hydraulique (51) qui est doté d'au moins deux parties (52, 53) à sections transversales d'écoulement différentes. La partie (52) qui présente la plus petite section transversale d'écoulement est tournée vers la chambre (32) et la partie (53) qui présente la plus grande section transversale d'écoulement est tournée vers la chambre pilote (38).
EP06807287.5A 2005-12-12 2006-10-16 Injecteur de carburant dote d'un organe de soupape d'injection a actionnement direct Not-in-force EP1963659B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005059169A DE102005059169A1 (de) 2005-12-12 2005-12-12 Kraftstoffinjektor mit direkt betätigbarem Einspritzventilglied
PCT/EP2006/067428 WO2007068518A1 (fr) 2005-12-12 2006-10-16 Injecteur de carburant dote d'un organe de soupape d'injection a actionnement direct

Publications (2)

Publication Number Publication Date
EP1963659A1 true EP1963659A1 (fr) 2008-09-03
EP1963659B1 EP1963659B1 (fr) 2015-12-23

Family

ID=37591844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06807287.5A Not-in-force EP1963659B1 (fr) 2005-12-12 2006-10-16 Injecteur de carburant dote d'un organe de soupape d'injection a actionnement direct

Country Status (6)

Country Link
US (1) US7926737B2 (fr)
EP (1) EP1963659B1 (fr)
JP (1) JP4898830B2 (fr)
CN (1) CN101331312B (fr)
DE (1) DE102005059169A1 (fr)
WO (1) WO2007068518A1 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006009018B4 (de) * 2006-02-27 2016-04-07 Robert Bosch Gmbh Kraftstoffinjektor mit direkt betätigbarer Düsennadel
DE102007042466B3 (de) * 2007-09-06 2009-04-09 Continental Automotive Gmbh Einspritzsystem mit reduzierter Schaltleckage und Verfahren zum Herstellen eines Einspritzsystems
DE102007051554A1 (de) * 2007-10-29 2009-04-30 Robert Bosch Gmbh Kraftstoffeinspritzventil für eine Brennkraftmaschine
DE102009000181A1 (de) * 2009-01-13 2010-07-15 Robert Bosch Gmbh Kraftstoff-Injektor
FR2947200B1 (fr) * 2009-06-25 2011-08-19 Prospection & Inventions Outil de pose d'elements de fixation a injecteur de combustible
DE102010001170A1 (de) 2010-01-25 2011-07-28 Robert Bosch GmbH, 70469 Einspritzvorrichtung mit reduzierten Druckschwingungen
CN102213166B (zh) * 2010-04-08 2013-01-30 北京亚新科天纬油泵油嘴股份有限公司 一种高压共轨电控喷油器
DE102010031220A1 (de) * 2010-07-12 2012-01-12 Robert Bosch Gmbh Verfahren und Vorrichtung zum Betreiben eines Kraftstoffeinspritzsystems
DE102012203700A1 (de) * 2012-03-08 2013-09-12 Man Diesel & Turbo Se Vorrichtung zum Freigeben eines Strömungsquerschnitts einer Gasleitung
DE102012212264B4 (de) 2012-07-13 2014-02-13 Continental Automotive Gmbh Verfahren zum Herstellen eines Festkörperaktuators
DE102012212266B4 (de) 2012-07-13 2015-01-22 Continental Automotive Gmbh Fluidinjektor
DE102012212614A1 (de) 2012-07-18 2014-01-23 Continental Automotive Gmbh Piezoinjektor mit hydraulisch gekoppelter Düsennadelbewegung
DE102012222509A1 (de) 2012-12-07 2014-06-12 Continental Automotive Gmbh Piezoinjektor
DE102012223934B4 (de) 2012-12-20 2015-10-15 Continental Automotive Gmbh Piezoinjektor
CN104033299B (zh) * 2014-06-19 2016-05-11 中国第一汽车股份有限公司无锡油泵油嘴研究所 一种共轨喷油器
US10544771B2 (en) * 2017-06-14 2020-01-28 Caterpillar Inc. Fuel injector body with counterbore insert

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JP3197385B2 (ja) * 1993-03-24 2001-08-13 株式会社日本自動車部品総合研究所 燃料噴射弁
DE19624001A1 (de) * 1996-06-15 1997-12-18 Bosch Gmbh Robert Kraftstoffeinspritzvorrichtung für Brennkraftmaschinen
DE19827267A1 (de) * 1998-06-18 1999-12-23 Bosch Gmbh Robert Kraftstoff-Einspritzventil für Hochdruck-Einspritzung mit verbesserter Steuerung der Kraftstoffzufuhr
GB9919660D0 (en) * 1999-08-20 1999-10-20 Lucas Industries Ltd Fuel injector
DE19947772A1 (de) * 1999-10-05 2001-04-19 Hermann Golle Einspritzventil, insb. für Common-Rail-Einspritzsysteme
DE10006786A1 (de) * 2000-02-18 2001-08-30 Bosch Gmbh Robert Einspritzeinrichtung und Verfahren zum Einspritzen von Fluid
DE60126380T2 (de) * 2000-07-18 2007-11-15 Delphi Technologies, Inc., Troy Kraftstoffeinspritzventil
DE10104618A1 (de) * 2001-02-02 2002-08-08 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
DE10112147A1 (de) * 2001-03-14 2002-09-19 Bosch Gmbh Robert Ventil zum Steuern von Flüssigkeiten
JP2003113761A (ja) * 2001-08-01 2003-04-18 Denso Corp 燃料噴射弁
JP3882555B2 (ja) * 2001-09-20 2007-02-21 株式会社デンソー 燃料噴射弁
DE102004005452B4 (de) 2004-02-04 2014-01-09 Robert Bosch Gmbh Düsenhalterkombination mit direktgesteuertem Einspritzventilglied
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Also Published As

Publication number Publication date
JP4898830B2 (ja) 2012-03-21
DE102005059169A1 (de) 2007-06-14
JP2009518586A (ja) 2009-05-07
WO2007068518A1 (fr) 2007-06-21
CN101331312B (zh) 2011-05-25
US20080302887A1 (en) 2008-12-11
US7926737B2 (en) 2011-04-19
CN101331312A (zh) 2008-12-24
EP1963659B1 (fr) 2015-12-23

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