EP1576279A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1576279A1
EP1576279A1 EP03812549A EP03812549A EP1576279A1 EP 1576279 A1 EP1576279 A1 EP 1576279A1 EP 03812549 A EP03812549 A EP 03812549A EP 03812549 A EP03812549 A EP 03812549A EP 1576279 A1 EP1576279 A1 EP 1576279A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
tube
valve according
nozzle 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.)
Granted
Application number
EP03812549A
Other languages
German (de)
English (en)
Other versions
EP1576279B1 (fr
Inventor
Hubert Stier
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 EP1576279A1 publication Critical patent/EP1576279A1/fr
Application granted granted Critical
Publication of EP1576279B1 publication Critical patent/EP1576279B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • 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
    • 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
    • F02M2200/26—Fuel-injection apparatus with elastically deformable elements other than coil springs

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • DE 35 33 085 AI discloses a metering valve for metering liquids or gases, in particular an injection valve for fuel injection systems in internal combustion engines, which has a piezo stack actuator, the change in length of which is transmitted to a valve needle controlling a metering opening when an excitation voltage is applied, and determines the stroke of the valve needle.
  • the substance to be measured is fed via a feed line, which is designed in the form of a deep hole in the valve body.
  • a disadvantage of the injection valve known from DE 35 33 085 AI is that the housing of the injection valve is very solid and thus heavy and voluminous. It requires a large installation space and increased material and manufacturing costs.
  • the drilling is due on the one hand to the manufacturing process with contaminants such as drilling residues provided, on the other hand difficult to clean due to the material of the housing and the relatively rough surface.
  • the substance to be measured is subject to a high degree of contamination, which can lead to deposits and subsequent valve malfunctions.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that the tube that leads the fuel from the supply to the valve group can be manufactured separately and attached to the fuel injector, so that with a suitable choice of material, a higher level of cleanliness of the fuel through a smooth surface can be achieved with less wetting and the absence of a dead volume.
  • the common integrated arrangement of the fuel injector and the tube in a common housing is particularly advantageous.
  • the tube is advantageously made of steel and has an inner diameter of approximately 3 mm with a wall thickness of approximately 0.4 mm.
  • the tube extends axially parallel to the fuel injector. taking into account the central fuel supply, by laying the pipe bent radially outward to the housing.
  • Another advantageous embodiment provides for a straight pipe to be axially parallel over the entire length with a suitable decentralized arrangement of the inlet connection. This is particularly advantageous because it is easy to manufacture.
  • FIG. 1A shows a schematic illustration of a first exemplary embodiment of a fuel injection valve according to the invention
  • FIG. 1B shows a section through the first exemplary embodiment of a fuel injector according to the invention shown in FIG. 1A along the line IB-IB in FIGS. 1A and
  • Fig. 2 shows a second embodiment of a fuel injector according to the invention.
  • FIG. 1A shows a schematic section through a first exemplary embodiment of a fuel injector 1 designed according to the invention.
  • the fuel injection valve 1 comprises an actuator 2, which is preferably designed as a piezoelectric actuator 2.
  • the actuator 2 is encapsulated in a sleeve '3 for protection against tensile load.
  • the component consisting of the sleeve 3, the actuator 2 and a biasing spring 4 braced in the sleeve 3 against the actuator 2 can be preassembled and then introduced into a housing 5 of the fuel injection valve 1.
  • the fully assembled component is fixed in the housing 5 by a support ring 6.
  • the actuating element 7 and the sleeve 3 are sealed by means of a corrugated tube seal 8 against the fuel flowing through the fuel injection valve 1.
  • a valve needle 10 is non-positively connected to the actuating element 7 and / or is formed in one piece. It extends in the outflow direction into a valve group 11, which can be designed in any manner that meets the requirements for the fuel injector 1.
  • a valve closing body 12 is formed on the valve needle 10 and cooperates with a valve seat surface 13 to form a sealing seat.
  • the biasing spring 4_ acts on the valve needle 10 against an outflow direction, so that the fuel injector 1 is kept closed when the actuator 2 is not excited.
  • the fuel injection valve 1 is designed in the form of an outwardly opening fuel injection valve 1.
  • the valve group 11 is located in a nozzle body 14, which is sealed by a seal 15 against a cylinder head, not shown.
  • the housing 5 adjoins the nozzle body 14 on the inlet side.
  • the fuel injection valve 1 has a pipe 16 arranged parallel to it, which leads the fuel supplied via an inlet 17 to the valve group 11.
  • the tube 16 is integrated in the housing 5 of the fuel injector 1. It runs downstream of a filter element 18 arranged in the inlet connection 17 after a first bend 21 parallel to a longitudinal axis 23 of the fuel injector 1 and opens out on the downstream side of the support ring 6 after a second bend 22 through a transverse bore 20 into a Recess 19 of the nozzle body 14.
  • the tube 16 is tightly connected to the nozzle body 14, for example soldered or welded.
  • the tube 16 is preferably made of steel and has an inner diameter of approximately 3 mm with a wall thickness of approximately 0.4 mm.
  • the pipe 16 can be produced in a simple manner and is cheaper than a conventional deep hole, which also places high demands on the wall thickness of the fuel injector 1, which is thereby considerably larger than the fuel injector 1 designed according to the invention.
  • FIG. 1B shows a cross section through the fuel injection valve 1 shown in FIG. 1A along the line IB-IB in FIG. 1A.
  • the pipe 16, which runs parallel to the fuel injection valve 1 and is integrated in the common housing 5, can be seen on the right-hand side.
  • the fuel injector 1 is only slightly thickened due to the attachment of the tube 16 and, in its installed position in the cylinder head of the internal combustion engine, requires only an insignificantly more space than a fuel injector 1 without the tube 16 according to the invention.
  • FIG. 2 shows a second exemplary embodiment of a fuel injection valve 1 according to the invention. Components already explained with reference to FIG. 1A are provided with the same reference symbols.
  • the tube 16 shown in FIG. 2 is rectilinear over its entire axial length. It is seated on a decentralized inlet connection 17, which is arranged on an axis 24 parallel to the longitudinal axis 23 of the fuel injector 1 is on and runs along its entire axial length axially parallel to the longitudinal axis 23 of the fuel injector 1.
  • a transverse bore 20 is again provided, which connects at right angles to the tube 16 and forms the connection to the nozzle body 14.
  • the invention is not limited to the exemplary embodiments shown and is also suitable for any other construction of fuel injection valves 1.

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 une soupape d'injection de carburant, en particulier pour systèmes d'injection de carburant de moteurs à combustion interne. Cette soupape d'injection de carburant (1) comprend un actionneur (2) piézo-électrique ou magnétostrictif qui actionne un obturateur (12) placé dans un corps de buse (14), lequel coopère avec une surface de siège de soupape (13) pour créer une zone étanche. Entre un raccord d'entrée (17) et le corps de buse (14) est formé un tube (16) par lequel du carburant introduit par l'intermédiaire du raccord d'entrée (17) est conduit jusqu'à la zone étanche du siège.
EP03812549A 2002-12-11 2003-07-04 Soupape d'injection de carburant Expired - Lifetime EP1576279B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE2002157895 DE10257895A1 (de) 2002-12-11 2002-12-11 Brennstoffeinspritzventil
DE10257895 2002-12-11
PCT/DE2003/002238 WO2004053324A1 (fr) 2002-12-11 2003-07-04 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1576279A1 true EP1576279A1 (fr) 2005-09-21
EP1576279B1 EP1576279B1 (fr) 2010-09-08

Family

ID=32336206

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03812549A Expired - Lifetime EP1576279B1 (fr) 2002-12-11 2003-07-04 Soupape d'injection de carburant

Country Status (3)

Country Link
EP (1) EP1576279B1 (fr)
DE (2) DE10257895A1 (fr)
WO (1) WO2004053324A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005042342B4 (de) * 2005-09-06 2009-04-02 Continental Automotive Gmbh Einspritzventil mit separater Kraftstoffleitung
DE102005046666B4 (de) * 2005-09-29 2015-03-26 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102008056519A1 (de) * 2008-11-08 2010-05-12 Man Diesel Se Dichtungssystem
DE102009055370A1 (de) 2009-12-29 2011-06-30 Robert Bosch GmbH, 70469 Einspritzventil für ein Fluid
DE102009055362A1 (de) 2009-12-29 2011-06-30 Robert Bosch GmbH, 70469 Einspritzventil für ein Fluid

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19540155C2 (de) * 1995-10-27 2000-07-13 Daimler Chrysler Ag Servoventil für eine Einspritzdüse
US6364221B1 (en) * 1999-09-29 2002-04-02 Siemens Automotive Corporation Electronic fuel injector actuated by magnetostrictive transduction
EP1325227B1 (fr) * 2000-10-11 2006-07-05 Siemens VDO Automotive Corporation Ensemble compensateur a membrane souple pour injecteur de carburant et procede correspondant
DE10110678A1 (de) * 2001-03-06 2002-10-02 Siemens Ag Dosiervorrichtung
US6499471B2 (en) * 2001-06-01 2002-12-31 Siemens Automotive Corporation Hydraulic compensator for a piezoelectrical fuel injector

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004053324A1 *

Also Published As

Publication number Publication date
WO2004053324A1 (fr) 2004-06-24
DE10257895A1 (de) 2004-06-24
DE50313083D1 (de) 2010-10-21
EP1576279B1 (fr) 2010-09-08

Similar Documents

Publication Publication Date Title
EP1115970B1 (fr) Soupape d'injection de carburant
EP1307651B1 (fr) Soupape de dosage comportant un element de transfert hydraulique
EP1588046A1 (fr) Soupape d'injection munie d'un revetement empechant la corrosion et resistant a l'usure, et son procede de production
EP1474603A1 (fr) Soupape d'injection de carburant
DE10320592A1 (de) Förderpumpe, insbesondere Hochdruck-Kraftstoffpumpe für eine Brennkraftmaschine
WO2002068811A1 (fr) Soupape d'injection de carburant
EP2206912B1 (fr) Injecteur de carburant
EP2884091B1 (fr) Soupape d'injection de combustible
EP1576279B1 (fr) Soupape d'injection de carburant
DE102009024595A1 (de) Einspritzventil mit Übertragungseinheit
EP3380715B1 (fr) Injecteur de carburant
EP1606508B1 (fr) Soupape d'injection de carburant
WO2011079987A1 (fr) Injecteur pour fluide
DE10310787A1 (de) Rohrfeder für Aktor und Verfahren zur Montage der Rohrfeder
EP1690001A1 (fr) Systeme d'injection de carburant
EP1185780B1 (fr) Soupape d'injection de carburant pour moteurs a combustion interne, et son procede de production
WO2008058799A1 (fr) Injecteur de carburant
DE102020208768A1 (de) Brennstoffverteilerleiste für eine Einspritzanlage und Einspritzanlage für gemischverdichtende, fremdgezündete Brennkraftmaschinen
WO2004094811A1 (fr) Soupape d'injection de carburant
WO2014063819A1 (fr) Dispositif d'injection de carburant pour moteurs à combustion interne
WO2009135712A1 (fr) Injecteur de carburant et procédé de production associé
DE102021212779A1 (de) Brennstoffeinspritzventil
EP1658429A1 (fr) Soupape d'injection de carburant
DE19607013C2 (de) Brennkraftmaschinen mit einem Ventilhaltekörper aus Kunststoff
DE102019219628A1 (de) Ventil zum Zumessen eines Fluids, insbesondere Brennstoffeinspritzventil

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20050711

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

DAX Request for extension of the european patent (deleted)
RBV Designated contracting states (corrected)

Designated state(s): DE FR GB IT

17Q First examination report despatched

Effective date: 20080417

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 50313083

Country of ref document: DE

Date of ref document: 20101021

Kind code of ref document: P

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20110609

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 50313083

Country of ref document: DE

Effective date: 20110609

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20140925

Year of fee payment: 12

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20150724

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20150730

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20150728

Year of fee payment: 13

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50313083

Country of ref document: DE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160202

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160704

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160801

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160704

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160704