EP1452729A1 - Injecteur de carburant - Google Patents

Injecteur de carburant Download PDF

Info

Publication number
EP1452729A1
EP1452729A1 EP03025330A EP03025330A EP1452729A1 EP 1452729 A1 EP1452729 A1 EP 1452729A1 EP 03025330 A EP03025330 A EP 03025330A EP 03025330 A EP03025330 A EP 03025330A EP 1452729 A1 EP1452729 A1 EP 1452729A1
Authority
EP
European Patent Office
Prior art keywords
actuator
fuel injection
injection valve
valve according
fuel
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
EP03025330A
Other languages
German (de)
English (en)
Other versions
EP1452729B1 (fr
Inventor
Bruno Seidner
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 EP1452729A1 publication Critical patent/EP1452729A1/fr
Application granted granted Critical
Publication of EP1452729B1 publication Critical patent/EP1452729B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F02M61/16—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
    • 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
    • F02M61/04—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series
    • F02M61/08—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00 having valves, e.g. having a plurality of valves in series the valves opening in direction of fuel flow
    • 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
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0012—Valves
    • F02M63/0057—Means for avoiding fuel contact with valve actuator, e.g. isolating actuators by using bellows or diaphragms

Definitions

  • the invention is based on a fuel injector according to the genus of the main claim.
  • An injection valve is known from EP 0 869 278 A1, which has a piezoelectric actuator and a first Spring element, which the actuator has an actuator or an actuator head against a housing.
  • the Actuator or the actuator head is in this way kept in constant contact with the actuator.
  • a valve needle which on the spray side of the actuator or the actuator head via the actuator or the actuator head with the actuator in There is an active connection and at its spray-side end Valve closing body is formed by a second Spring element against the actuator head or the actuator biased.
  • the first is also known from the prior art To arrange the spring element radially around the actuator to the Actuator or actuator head in a permanent system to keep up with the actuator.
  • a disadvantage of this known prior art is that by the second spring element necessary here, the Force acting against the stroke direction of the actuator construction effort to manufacture the Fuel injector and the number of it required components is significantly increased. Besides, they are Overall length of the fuel injector and the stroke losses significantly enlarged. Especially through the enlarged Stroke losses must be significantly longer for the actuator and / or a coupler which is used for stroke translation and / or Compensation for temperature-related changes in length of Components used, must be used. This also increases the length of the fuel injector disadvantageous. The Reliability is reduced. The power requirement of the Actuator and thus the heat loss to be dissipated disadvantageously increased. Due to the overall increased length of the Fuel injector and in particular the actuator, effect temperature-related changes in length of the used materials reinforced.
  • the fuel injector according to the invention with the has characteristic features of the main claim in contrast, the advantage that in particular on the second Spring element can be dispensed with. This is one further reduction in the number of components and one shorter overall length of the fuel injector possible.
  • the reliability of the fuel injector is increases, stroke losses are avoided and on a coupler can, especially because of the shortened length of the Components to be dispensed with.
  • the Power requirement and the heat emission of the actuator advantageous reduced.
  • Fuel injector In a preferred embodiment of the Fuel injector according to the invention are the Forces caused by the inside of the Fuel injector prevailing fuel pressure in act in the axial direction on the valve needle, balanced. In this way, fluctuating effects act in particular Fuel pressures in the fuel injector are not on the Closing or opening forces.
  • the force of the spring element advantageously acts both with closed as well as with open Fuel injector against the stroke direction of the Actuator.
  • the spring element can thereby advantageously with a adjustable and permanent preload.
  • Valve needle on the actuator directly or indirectly relative to spray-side end of the actuator fixed can in particular by welding or soldering.
  • the actuator Arranged actuator head is on the spray side of the actuator Arranged actuator head, this preferably is disc-shaped.
  • the sensitive actuator will thereby at the spray end against mechanical influences protected and locked.
  • the spring element on Actuator head attacks.
  • the spring forces can be advantageous transfer to the actuator head, the valve needle and the actuator become.
  • the Actuator from an actuator housing, a flexible section and the valve needle is hermetically sealed.
  • the Function of the actuator is ensured in particular by placing the actuator in front of you in this way Contact with fuel is protected.
  • the flexible section is preferably corrugated or formed corrugated and / or at least partly made of metal, especially steel. A high Lifetime with good mechanical strength is guaranteed. In addition, the flexible This makes section particularly easy to manufacture and join become.
  • valve housing and / or the Actuator housing made of a material with low or negligible low thermal expansion, especially from Invar steel.
  • actuator housing is radial is at least partially flowed around by fuel.
  • the fuel injector 1 shown is as Fuel injector 1 for fuel injection systems for mixture-compressing, spark ignition internal combustion engines for injecting fuel directly into one further illustrated combustion chamber of an internal combustion engine suitable.
  • a perforated disc-shaped Intermediate element 8 arranged in the upper, upstream part, transverse to a central axis 17 of the Fuel injector 1, a perforated disc-shaped Intermediate element 8 arranged.
  • the intermediate element 8 is in the Area of its radial outer surface with the inner wall of the Valve housing 18, for example, by a weld seam shown and has a Fuel channel 11 in the form of a bore.
  • a hollow cylindrical actuator housing 7 engages with one upstream piston-shaped pin 22 coaxial through the intermediate element 8, the diameter of the Bolt 22 is smaller than the diameter of the rest Actuator housing 7.
  • the bolt 22 is the rest of the Actuator housing 7 arranged coaxially.
  • the Bolt 22 has a thread 10, which in this Embodiment is designed as an external thread.
  • the actuator housing 7 points radially next to the Bolt 22 has a circumferential shoulder 23, which under Liner of an intermediate body 9 on the Intermediate element 8 in one in the intermediate element 8 trained recess 24 rests.
  • the recess 8 prevents a displacement of the actuator housing 7 in the radial Direction.
  • the actuator housing 7 is by an upstream of the intermediate element 8 arranged nut 21, which a not shown, engaging in the external thread 10 Has internal thread, drawn into the recess 24 and there fixed.
  • the valve housing 18 is one Cover 19, which is a fuel supply 20 in the form of a Opening, completed.
  • the actuator housing 7 there is an actuator 2, a tubular one Spring element 3, a plate-shaped actuator foot 5 and a plate-shaped actuator head 4 arranged.
  • the rod-shaped Actuator 2 is between the actuator base arranged on the inflow side 5 and the downstream arranged actuator head 4 by the Spring element 3 biased.
  • the spring element 3 surrounds the Actuator 2 is radial, with its upstream end in Joined area of the outer circumference of the actuator base 5 and with its downstream end in the area of the outer circumference of the Actuator head 4, for example, integrally connected.
  • At the downstream end of the actuator housing 7 is in this Embodiment made of steel, tubular and bellows-shaped flexible section 6 hermetically sealed together.
  • the flexible section 6 is also in the range of Added outer circumference of the valve needle 12.
  • a valve needle 12 which on the inflow side with the actuator head 4 for example by a weld, not shown is connected, has a spray side Valve closing body 13, the one with a Valve seat body 15 formed valve seat surface 14 a sealing seat cooperates.
  • the force is due to the thickness of the intermediate body 9 determines with which the valve closing body 13 against the Sealing seat is biased.
  • the invention is not shown on the Embodiments limited and also for any other designs of fuel injection valves 1, in particular fuel injectors that open inside, suitable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP03025330A 2003-02-28 2003-11-04 Injecteur de carburant Expired - Lifetime EP1452729B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10308915A DE10308915A1 (de) 2003-02-28 2003-02-28 Brennstoffeinspritzventil
DE10308915 2003-02-28

Publications (2)

Publication Number Publication Date
EP1452729A1 true EP1452729A1 (fr) 2004-09-01
EP1452729B1 EP1452729B1 (fr) 2006-12-13

Family

ID=32748130

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03025330A Expired - Lifetime EP1452729B1 (fr) 2003-02-28 2003-11-04 Injecteur de carburant

Country Status (3)

Country Link
EP (1) EP1452729B1 (fr)
AT (1) ATE348261T1 (fr)
DE (2) DE10308915A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2090771A1 (fr) * 2008-02-13 2009-08-19 Robert Bosch Gmbh Injecteur de carburant doté d'un pointeau de soupape commandé directement

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725002A (en) * 1985-09-17 1988-02-16 Robert Bosch Gmbh Measuring valve for dosing liquids or gases
DE19743299A1 (de) * 1997-09-30 1999-04-22 Siemens Ag Vorrichtung zum Steuern eines Stellgliedes
DE19939132A1 (de) * 1999-08-18 2001-02-22 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1079098A2 (fr) * 1999-08-24 2001-02-28 Siemens Aktiengesellschaft Soupape de dosage
DE19958704A1 (de) * 1999-12-06 2001-06-13 Siemens Ag Vorrichtung zum Übertragen einer Aktorbewegung und Fluiddosierer mit einer solchen Vorrichtung
EP1111230A2 (fr) * 1999-12-22 2001-06-27 Siemens Aktiengesellschaft Dispositif hydraulique pour transmettre le mouvement d'un actuateur
DE10007735A1 (de) * 2000-02-19 2001-09-06 Daimler Chrysler Ag Einspritzventil
DE10137210A1 (de) * 2001-07-30 2003-02-20 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10204655A1 (de) * 2002-02-05 2003-08-28 Bosch Gmbh Robert Brennstoffeinspritzventil
WO2003089781A1 (fr) * 2002-04-22 2003-10-30 Siemens Aktiengesellschaft Dispositif de dosage pour fluides, notamment soupape d'injection d'automobile

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0869278B1 (fr) * 1997-04-04 2004-03-24 Siemens Aktiengesellschaft Soupape à injection avec moyens de compensation de la dilatation thermique d'un organe d'actionnement piézoélectrique
EP1046809B1 (fr) * 1999-04-20 2005-08-10 Siemens Aktiengesellschaft Dispositif de dosage d'un fluide
DE19928916B4 (de) * 1999-06-24 2017-12-14 Robert Bosch Gmbh Brennstoffeinspritzventil

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4725002A (en) * 1985-09-17 1988-02-16 Robert Bosch Gmbh Measuring valve for dosing liquids or gases
DE19743299A1 (de) * 1997-09-30 1999-04-22 Siemens Ag Vorrichtung zum Steuern eines Stellgliedes
DE19939132A1 (de) * 1999-08-18 2001-02-22 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1079098A2 (fr) * 1999-08-24 2001-02-28 Siemens Aktiengesellschaft Soupape de dosage
DE19958704A1 (de) * 1999-12-06 2001-06-13 Siemens Ag Vorrichtung zum Übertragen einer Aktorbewegung und Fluiddosierer mit einer solchen Vorrichtung
EP1111230A2 (fr) * 1999-12-22 2001-06-27 Siemens Aktiengesellschaft Dispositif hydraulique pour transmettre le mouvement d'un actuateur
DE10007735A1 (de) * 2000-02-19 2001-09-06 Daimler Chrysler Ag Einspritzventil
DE10137210A1 (de) * 2001-07-30 2003-02-20 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10204655A1 (de) * 2002-02-05 2003-08-28 Bosch Gmbh Robert Brennstoffeinspritzventil
WO2003089781A1 (fr) * 2002-04-22 2003-10-30 Siemens Aktiengesellschaft Dispositif de dosage pour fluides, notamment soupape d'injection d'automobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2090771A1 (fr) * 2008-02-13 2009-08-19 Robert Bosch Gmbh Injecteur de carburant doté d'un pointeau de soupape commandé directement

Also Published As

Publication number Publication date
DE10308915A1 (de) 2004-09-09
EP1452729B1 (fr) 2006-12-13
DE50305952D1 (de) 2007-01-25
ATE348261T1 (de) 2007-01-15

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