EP1538331A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

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Publication number
EP1538331A1
EP1538331A1 EP04105050A EP04105050A EP1538331A1 EP 1538331 A1 EP1538331 A1 EP 1538331A1 EP 04105050 A EP04105050 A EP 04105050A EP 04105050 A EP04105050 A EP 04105050A EP 1538331 A1 EP1538331 A1 EP 1538331A1
Authority
EP
European Patent Office
Prior art keywords
fuel injection
injection valve
valve according
recess
chamber
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
EP04105050A
Other languages
German (de)
English (en)
Other versions
EP1538331B1 (fr
Inventor
Klaus Noller
Michael Huebel
Thomas Gerschwitz
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 EP1538331A1 publication Critical patent/EP1538331A1/fr
Application granted granted Critical
Publication of EP1538331B1 publication Critical patent/EP1538331B1/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
    • 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
    • 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
    • F02M61/167—Means for compensating clearance or thermal expansion
    • 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
    • F02M2200/16—Sealing of fuel injection apparatus not otherwise provided for
    • 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
    • F02M2200/70—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger
    • F02M2200/703—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic
    • F02M2200/707—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for avoiding fuel contact with actuators, e.g. isolating actuators by using bellows or diaphragms

Definitions

  • the invention is based on a fuel injection valve according to the preamble of the main claim.
  • a disadvantage of this known prior art is that leakage through sealing rings is not completely avoided can be and the fuel injectors thereby a have a shorter lifespan.
  • the seal by Corrugated pipe seals greatly increase the amount of hydraulic medium and thus the temperature-dependent behavior of the coupler. In addition, the size and the manufacturing cost elevated.
  • the fuel injection valve according to the invention with the characterizing features of the main claim has In contrast, the advantage that the hydraulic medium of Kopplers is permanently sealed and the space as well the production costs are reduced.
  • Couplers In a first development engages or protrudes Diameter entry into a recess, wherein in a further development of the recess in a enlarging the volume of the coupler. This allows the Couplers are built compact and the bias, with the the flexible section acts on the hydraulic medium, be favorably influenced.
  • the fuel injection valve 1 shown in Fig. 1 is in the form of a fuel injection valve 1 for Fuel injection systems of mixture compression, spark-ignited internal combustion engines running.
  • the Fuel injector 1 is particularly suitable for direct injection of fuel into one illustrated combustion chamber of an internal combustion engine.
  • the fuel injection valve 1 comprises a housing 2, in which one provided with an Aktorumspritzung 3 piezoelectric or magnetostrictive actuator 4 arranged is.
  • the actuator 4 can by means of an electrical line 5, at which a protruding from the housing 2 electrical Terminal 6 may be formed, an electrical voltage be supplied.
  • the actuator 4 is supported on the inflow side a master piston 9 of a hydraulic coupler 7 and downstream of an actuator head 8 from.
  • the hydraulic Coupler 7 further comprises a slave piston 10, a Compression spring 11, which the hydraulic coupler 7 with a Bias biased, and a compensation chamber 12, which is filled with a hydraulic medium. Of the Fuel is fed centrally via an inlet 14.
  • Valve needle 16 Downstream of the actuator head 8 is an actuating body 15th arranged, which acts on a valve needle 16.
  • the Valve needle 16 has at its downstream end a Valve-closing body 17 on. This works with a Valve seat surface 18, which on a nozzle body 19th is formed, together to form a sealing seat.
  • a Return spring 20 acts on the valve needle 16 so that the fuel injection valve 1 in the de-energized state of Actuator 4 remains in the closed state. Continues to provide they after the injection phase for the provision of the Valve needle 16.
  • the nozzle body 19 is by means of a weld 21 in one Inner housing 22 fixed, which the actuator 4 against the Fuel seals.
  • the fuel flows from the inlet 14 between the housing 2 and the inner housing 22 for Sealing seat.
  • Fig. 2 shows a similar to that shown in Fig. 1 Coupler constructed coupler 7.
  • Hydraulic couplers 7 in fuel injection valves 1 are usually on the one hand for conversion or translation of the stroke of Actuator 4 on the valve needle 16 and / or on the other hand to Compensation of temperature-induced changes in length of the actuator. 4 and the housing 2 designed. The latter will, as in the Embodiment shown by means of a Second medium coupler executed coupler 7 realized which is not in contact with the fuel Contains hydraulic medium.
  • the hydraulic fluid fills the Compensation space 12 and a between master piston 9 and Slave piston 10 trained coupler volume 23, which with the compensation chamber 12 is connected via a throttle 24.
  • the compensation chamber 12 is inside and outside of the Slave piston 10 is arranged, wherein the two parts by a transverse bore 31 are connected to each other and the outside lying part of the expansion chamber 12 by means of a as a corrugated pipe seal executed flexible portion 13th opposite to the fuel injection valve 1 is sealed by flowing fuel.
  • at Temperature changes will be hydraulic medium between the Coupler volume 23 via the throttle 24 with the compensation chamber 12 exchanged.
  • the necessary filling pressure is over in the slave piston 10 in a pressure storage chamber 32nd arranged compression spring 11 applied. This is between a first closure body 25 and a second Closure body 26 arranged, the former a groove 27th with a sealing ring 28 disposed therein for sealing the Coupling space 12 has.
  • a disadvantage of the described design of the Fuel injection valve 1 and the hydraulic coupler 7 is in particular that the leakage losses at the in the groove 27 arranged sealing ring 28 are relatively high. This sets the endurance resistance of the fuel injection valve 1, since the hydraulic medium on the sealing ring 28 with time leaking into the accumulator chamber 32 and thus the through the compression spring 11 decreases the applied bias.
  • undesirable behavior in the Fuel injection valve 1 over the life by virtue of The complicated construction is the production of the coupler 7 very expensive and the size increased unfavorably.
  • Moreover, in particular by the shape of the flexible Section a relatively large capacity of the hydraulic medium necessary. But this increases the temperature dependence by the temperature expansion.
  • FIG 3 shows a first exemplary embodiment of a coupler 7 for an inventively designed Fuel injector 1.
  • the slave piston 10 engages a piston-shaped second slave section 35 in the in essential cylindrical master piston 9 a.
  • the Slave piston 10 and the second slave section 35 are in Master piston 9 axially movable with a guide gap 38th guided.
  • the guide gap 38 is relatively small, wherein the through the guide gap 38 in operation passing amount Hydraulic medium is negligible small.
  • the guide gap 38 a Exercise throttle function.
  • the slave piston 10th from a first slave section 34 and a second Nehmerabrough 35 wherein in other embodiments the slave piston 10 can also be made in one piece.
  • the first slave section 34 is cylindrical and tapered extending from a diameter that is about the diameter of the Master piston 9 corresponds, stepwise in the direction of Master piston 9, and the second slave section 35.
  • the rejuvenated part of the first Nehmerabrough 34 partially engages coaxially in the second Nehmerabrough 35 and is fixed there immovable, for example, by pressing or welding.
  • a flexible section 13 which is tubular and elastic and a U-shaped diameter retraction 33 is circumferentially, arranged in the region of the recess 39.
  • the U-shaped Diameter indentation 33 protrudes into the recess 39.
  • the flexible section 13 In the area of the upper end is the flexible section 13 on the circumference of the first slave section 34, for example cohesive, hermetically sealed.
  • the flexible portion 13 In the area of his the lower end, the flexible portion 13 is circumferentially of the Master piston 9 hermetically sealed.
  • the slave piston 10 has a centered channel 29, which merges into a compensation channel 36 in the course and out through a ball 30, which after filling the coupler 7 with hydraulic medium for closing the Channel 29 is inserted, is closed.
  • a compensation channel 36 which in this embodiment is designed as a stepped bore ends at his the Coupler volume 23 facing the end of a throttle plate 37, the at least one as a relatively small hole executed, centered throttle 24 has.
  • the Throttle 24 opens into the coupler volume 23rd
  • the transverse bore 31 Approximately at the height of the passage of the channel 29 in the Compensation channels 36 is the transverse bore 31, which also by other shaping methods than drilling can be produced.
  • the throttle plate 37 is in the Surface of the second slave section 35 embedded and for example, by welding material fit to the second Nehmerabites 35 added.
  • the transverse bore 31 connects via the throttle 24, the coupler volume 23 with the compensation chamber 12th
  • Fig. 4 shows a second embodiment of a Inventive fuel injector 1 in the area of the coupler 7, similar to the first embodiment Fig. 3.
  • the channel 29 is arranged in the master piston 9. Of the Channel 29 opens directly into the coupler volume 23.
  • Der Compensation channel 36 connects the coupler volume 23, the Compensation space 12 and a chamber 41 with each other.
  • the chamber 41 is formed in the slave piston 10, wherein in this Embodiment, the chamber 41 by a first Recess 44, which centers in one the first Nehmerabites 34 above and laterally comprehensive attachment 43 is arranged, and by a second recess 45, the centered at the upper end of the first slave section 34 is formed, is formed.
  • the recesses 44, 45 lie with the interposition of a Membrane 42 hydraulically close to each other and tight form the chamber 41.
  • the membrane 42 is made for example, an elastomer and shares the chamber 41st hermetically sealed in the first recess 44 and the second Recess 45.
  • the second recess 45 is above the Compensation channel 36 with the coupler volume 23 in conjunction.
  • the first recess 44 is, for example, with a gas filled with pressure and thus exerts on the hydraulic medium a pressure off.
  • the Coupler internal pressure via an additional in the chamber 41st arranged spring can be generated, so that the interior 41st is depressurized.
  • the membrane 42 is elastic and consists of an elastomer, for example from Viton. That to Slave piston 10 belonging attachment 43 is, for example by pressing and / or welding with the first Nehmerabites 34 connected.
  • the flexible section 13 is with its upper end on the radially outer surface of the attachment 43 hermetically sealed.
  • the invention is not limited to those shown Embodiments limited and for any designs of fuel injection valves 1, in particular for Fuel injection valves 1 for self-igniting Internal combustion engines and / or inward opening Fuel injection valves, suitable.
  • the Exemplary embodiments can be combined with one another as desired.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20040105050 2003-12-03 2004-10-14 Soupape d'injection de carburant Expired - Lifetime EP1538331B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10357454 2003-12-03
DE2003157454 DE10357454A1 (de) 2003-12-03 2003-12-03 Brennstoffeinspritzventil

Publications (2)

Publication Number Publication Date
EP1538331A1 true EP1538331A1 (fr) 2005-06-08
EP1538331B1 EP1538331B1 (fr) 2007-05-30

Family

ID=34442509

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040105050 Expired - Lifetime EP1538331B1 (fr) 2003-12-03 2004-10-14 Soupape d'injection de carburant

Country Status (2)

Country Link
EP (1) EP1538331B1 (fr)
DE (2) DE10357454A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1591656A3 (fr) * 2004-04-26 2005-11-23 Isuzu Motors Limited Méchanisme d'absortion de l'expansion différentielle et une soupape d'injection de combustible comprenant celui-ci
EP1780405A1 (fr) * 2005-10-26 2007-05-02 Siemens Aktiengesellschaft Injecteur, dispositif de compensation pour l'injecteur et moyen de transmission de pression pour le dispositif de compensation
EP1813805A1 (fr) * 2006-01-27 2007-08-01 Siemens VDO Automotive S.p.A. Ensemble de compensation pour un injecteur
EP1918571A1 (fr) * 2006-11-02 2008-05-07 Siemens Aktiengesellschaft Injecteur de dosage de fluide
EP2078846A1 (fr) * 2008-01-14 2009-07-15 Continental Automotive GmbH Agencement d'actionneur et soupape à injection
US20150014436A1 (en) * 2012-02-27 2015-01-15 Robert Bosch Gmbh Valve for Metering Fluid

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2235251B1 (fr) 2007-12-21 2018-03-07 BSH Hausgeräte GmbH Dispositif de repassage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858439A (en) * 1987-03-03 1989-08-22 Toyota Jidosha Kabushiki Kaisha Device for varying a stroke
WO1993006625A1 (fr) * 1991-09-27 1993-04-01 Siemens Aktiengesellschaft Transformateur hydraulique de deplacement pour l'organe piezoelectrique d'actionnement d'une soupape d'admission
US20020139863A1 (en) * 2000-10-11 2002-10-03 Jack Lorraine Compensator assembly having a flexible diaphragm and an internal filling tube for a fuel injector and method
WO2003031799A1 (fr) * 2001-10-02 2003-04-17 Robert Bosch Gmbh Soupape d'injection de carburant
DE10149914A1 (de) * 2001-10-10 2003-04-24 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1452727A1 (fr) * 2003-02-27 2004-09-01 Robert Bosch Gmbh Injecteur de carburant

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0477400B1 (fr) * 1990-09-25 2000-04-26 Siemens Aktiengesellschaft Dispositif compensateur de tolérance dans la direction de mouvement du transformateur de déplacement d'un dispositif d'actionnement piézoélectrique
DE19962177A1 (de) * 1999-12-22 2001-07-12 Siemens Ag Hydraulische Vorrichtung zum Übertragen einer Aktorbewegung
DE10159749A1 (de) * 2001-12-05 2003-06-12 Bosch Gmbh Robert Brennstoffeinspritzventil

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4858439A (en) * 1987-03-03 1989-08-22 Toyota Jidosha Kabushiki Kaisha Device for varying a stroke
WO1993006625A1 (fr) * 1991-09-27 1993-04-01 Siemens Aktiengesellschaft Transformateur hydraulique de deplacement pour l'organe piezoelectrique d'actionnement d'une soupape d'admission
US20020139863A1 (en) * 2000-10-11 2002-10-03 Jack Lorraine Compensator assembly having a flexible diaphragm and an internal filling tube for a fuel injector and method
WO2003031799A1 (fr) * 2001-10-02 2003-04-17 Robert Bosch Gmbh Soupape d'injection de carburant
DE10149914A1 (de) * 2001-10-10 2003-04-24 Bosch Gmbh Robert Brennstoffeinspritzventil
EP1452727A1 (fr) * 2003-02-27 2004-09-01 Robert Bosch Gmbh Injecteur de carburant

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1591656A3 (fr) * 2004-04-26 2005-11-23 Isuzu Motors Limited Méchanisme d'absortion de l'expansion différentielle et une soupape d'injection de combustible comprenant celui-ci
US7198202B2 (en) 2004-04-26 2007-04-03 Isuzu Motors Limited Differential expansion absorption mechanism and fuel injection valve comprising same
EP1780405A1 (fr) * 2005-10-26 2007-05-02 Siemens Aktiengesellschaft Injecteur, dispositif de compensation pour l'injecteur et moyen de transmission de pression pour le dispositif de compensation
EP1813805A1 (fr) * 2006-01-27 2007-08-01 Siemens VDO Automotive S.p.A. Ensemble de compensation pour un injecteur
EP1918571A1 (fr) * 2006-11-02 2008-05-07 Siemens Aktiengesellschaft Injecteur de dosage de fluide
EP2078846A1 (fr) * 2008-01-14 2009-07-15 Continental Automotive GmbH Agencement d'actionneur et soupape à injection
US20150014436A1 (en) * 2012-02-27 2015-01-15 Robert Bosch Gmbh Valve for Metering Fluid
US9470198B2 (en) * 2012-02-27 2016-10-18 Robert Bosch Gmbh Valve for metering fluid

Also Published As

Publication number Publication date
DE10357454A1 (de) 2005-07-07
DE502004003933D1 (de) 2007-07-12
EP1538331B1 (fr) 2007-05-30

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