EP1105639A1 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant

Info

Publication number
EP1105639A1
EP1105639A1 EP99962123A EP99962123A EP1105639A1 EP 1105639 A1 EP1105639 A1 EP 1105639A1 EP 99962123 A EP99962123 A EP 99962123A EP 99962123 A EP99962123 A EP 99962123A EP 1105639 A1 EP1105639 A1 EP 1105639A1
Authority
EP
European Patent Office
Prior art keywords
armature
fuel injection
spring
valve needle
spring element
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
EP99962123A
Other languages
German (de)
English (en)
Other versions
EP1105639B1 (fr
Inventor
Ferdinand Reiter
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 EP1105639A1 publication Critical patent/EP1105639A1/fr
Application granted granted Critical
Publication of EP1105639B1 publication Critical patent/EP1105639B1/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
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0685—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature and the valve being allowed to move relatively to each other or not being attached to each other
    • 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
    • F02M2200/30—Fuel-injection apparatus having mechanical parts, the movement of which is damped
    • F02M2200/306—Fuel-injection apparatus having mechanical parts, the movement of which is damped using mechanical means

Definitions

  • the invention relates to a fuel injector according to the preamble of the main claim.
  • the fuel injector has a valve closing body connected to a valve needle, which cooperates with a valve seat surface formed on a valve seat body to form a sealing seat.
  • a magnet coil is provided which interacts with a magnet armature which is movable on the valve needle between a first stop limiting the movement of the armature in the stroke direction of the valve needle and a second stop limiting the movement of the armature against the stroke direction.
  • the axial movement play of the armature defined by the two stops leads within certain limits to a decoupling of the inertial mass of the valve needle and the valve closing body on the one hand and the inertial mass of the armature on the other hand.
  • Valve seat body moved back against the spray direction. Valve bumpers can therefore occur even more frequently with this type of fuel injector.
  • the fuel injector according to the invention with the characterizing features of the main claim has the advantage that possible bouncing of the valve needle can be avoided even more effectively. This results in high long-term stability, since the spring element has a long service life compared to an elastomer material and, in particular, cannot be destroyed by the fuel. A targeted adjustment of the damping properties is possible to the extent that certain materials, shapes and preloads are used for the spring element.
  • the spring element serves firstly as a lower second stop for the armature, secondly as a damping element that continuously brakes the movement of the armature and in this way prevents or severely restricts the valve needle from bouncing on the valve seat surface, and thirdly as a sliding spring that pushes the armature into it Presses the rest position to the system at the first stop.
  • a very high level of functional integration is advantageously achieved with one component of the spring element.
  • the spring element according to the invention is advantageously simple and inexpensive to manufacture, in
  • Fuel injector can be mounted and adjusted on the valve needle.
  • the spring element It is advantageous to design the spring element with a shaft and a plurality of spring arms extending from the shaft. It is advisable to use a spring steel sheet, which is brought into a desired mushroom shape by deep drawing and punching.
  • FIG. 1 shows an embodiment of a fuel injector according to the invention in a sectional view
  • FIG. 2 shows a detail from FIG. 1 around the armature in an enlarged view
  • FIG. 3 shows a section along the line III-III in FIG. 2
  • FIG. 4 shows an alternative embodiment of the as a damping spring serving spring element in an analogous representation to Figure 3 and Figure 5 is a plan view of a spring element.
  • FIG. 1 shows a fuel injection valve 1 according to the invention in a partially sectioned illustration.
  • the fuel injection valve 1 is used to inject Fuel in a mixture-compressing, spark-ignited internal combustion engine.
  • the exemplary embodiment shown can be used as a high-pressure injection valve for the direct injection of fuel, in particular gasoline, into the combustion chamber of an internal combustion engine.
  • the fuel injector 1 has, in the exemplary embodiment, a valve closing body 3 which is integrally connected to a valve needle 2 and which cooperates with a valve seat surface formed on a valve seat body 4 to form a sealing seat.
  • the valve seat body 4 is fastened in a tubular valve seat support 5, which can be inserted into a receiving bore of a cylinder head of the internal combustion engine and is sealed by means of a seal 6.
  • the valve seat support 5 is inserted at its inlet end 7 into a longitudinal bore 8 of a housing body 9 and sealed against the housing body 9 by means of a sealing ring 10.
  • the end 7 of the valve seat carrier 5 is prestressed by means of a threaded ring 11, a stroke adjusting disk 14 being clamped between a step 12 of the housing body 9 and an upper end face 13 of the valve seat carrier 5.
  • an armature 17 is drawn against a stop surface 18 of the housing body 9, the housing body 9 being formed upstream of the stop surface 18 as a magnetic inner pole, to which the
  • Stop surface 18 starting in the downstream direction connects a thin-walled magnetic throttle point 19.
  • the armature 17 due to the abutment of its upstream end face 35 against a stop body 20 which forms a first stop, takes on the Stop body 20 firmly connected valve needle 2 and the valve closing body 3 with.
  • the valve needle 2 is connected to the stop body 20 by a weld 22, for example.
  • the movement of the valve needle 2 takes place against a return spring 23 which is arranged between an adjusting sleeve 24 and the stop body 20.
  • the fuel flows through an axial bore 30 of the housing body 9 and at least one axial bore 31 provided in the armature 17 and via axial bores 33 provided in a guide disk 32 into a longitudinal opening 34 of the valve seat carrier 5 up to the sealing seat of the fuel injection valve 1.
  • the armature 17 is arranged movably on the valve needle 2 between the stop body 20 and a spring element 25 designed as a sliding spring and damping spring and serving as a second stop. Due to the spring force effect of the spring element 25, the armature 17 is in the non-excited rest position on the
  • Stop body 20 held in contact.
  • the spring element 25 is firmly connected to the valve needle 2.
  • Decoupling of the inert masses of the armature 17 on the one hand and the valve needle 2 and the valve closing body 3 on the other hand is achieved by the movement play of the armature 17 created between the stop body 20 and the spring element 25.
  • the armature 17 is not abruptly decelerated when the valve closing body 3 strikes the valve seat surface 26, but moves against the spring element 25, by means of which the armature 17 is braked in its movement.
  • the spring element 25 causes damping the stop of the armature 17 on the second armature stop opposite the stop body 20, which here is the spring element 25 itself according to the invention.
  • FIG. 2 shows the detail according to the invention around the armature 17 on a changed scale.
  • the arrangement of the axially movable armature 17 between its two stops is particularly clear, the stop body 20 being shown in a simplified construction compared to FIG. 1.
  • the spring element 25 serves firstly as a lower stop for the armature 17, secondly as a damping element which continuously brakes the movement of the armature 17 and in this way prevents or severely restricts the valve needle 2 from bouncing on the valve seat surface 26, and thirdly as a sliding spring which the
  • Anchor 17 presses into its rest position to rest against the stop body 20.
  • a very high level of functional integration is advantageously achieved with one component.
  • the spring element 25 is advantageously designed with a tubular shaft 38 and with a plurality of spring arms 39 extending therefrom.
  • the shaft 38 of the spring element 25 directly engages around the valve needle 2 and lies against it.
  • Two different embodiments of the shaft 38 are conceivable, as shown in FIGS. 3 and 4, which represent sections along the line III-III in FIG.
  • the shaft 38 lies directly against the circumference of the valve needle 2, which has a circular cross section, in the form of a sleeve.
  • the shaft 38 according to FIG. 4 is designed with, for example, three axially extending ribs 41 which protrude from the valve needle 2 and are arranged at a respective distance of 120 °.
  • These axial ribs 41 increase the radial elasticity of the spring element 25 and allow greater tolerances for the Establishing a firm connection on the valve needle 2 necessary press fit. In addition, a large contact surface is created in this way in order to be able to move the spring element 25 axially on the valve needle 2, which is necessary for the assembly and adjustment of the spring element 25.
  • Anchor 17 can be excluded.
  • the radial end of the spring arms 39 form spring arm ends 44 behind the outer regions 42 serving as armature supports, which are again bent away from the armature 17, so that no sharp edges lie against the armature 17.
  • FIG. 5 shows a plan view of a spring element 25 with six spring arms 39 distributed over the circumference.
  • the spring arms 39 have, for example, accordingly of the course of the bending moment radially outwards to a smaller width than towards the shaft 38.

Landscapes

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

Abstract

Soupape (1) d'injection de carburant pour systèmes d'injection de carburant de moteurs à combustion interne, qui comporte une bobine (15) d'électro-aimant, un induit (17) qui peut subir l'action de la bobine (15) dans la direction de levée, contre la force d'un ressort de rappel (23), et un pointeau (2) de soupape se trouvant en liaison avec un obturateur (3) de soupape. L'induit (7) est mobile entre une première butée (20) reliée au pointeau (2) de soupape et limitant le déplacement de l'induit (17) dans le sens de levée et une seconde butée (25) reliée au pointeau (2) de soupape et limitant le déplacement de l'induit (17) dans le sens contraire au sens de levée. La seconde butée est constituée par un élément ressort (25).
EP99962123A 1999-06-18 1999-12-02 Soupape d'injection de carburant Expired - Lifetime EP1105639B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19927900 1999-06-18
DE19927900A DE19927900A1 (de) 1999-06-18 1999-06-18 Brennstoffeinspritzventil
PCT/DE1999/003868 WO2000079120A1 (fr) 1999-06-18 1999-12-02 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
EP1105639A1 true EP1105639A1 (fr) 2001-06-13
EP1105639B1 EP1105639B1 (fr) 2005-01-26

Family

ID=7911710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99962123A Expired - Lifetime EP1105639B1 (fr) 1999-06-18 1999-12-02 Soupape d'injection de carburant

Country Status (6)

Country Link
US (1) US6520434B1 (fr)
EP (1) EP1105639B1 (fr)
JP (1) JP2003502573A (fr)
KR (1) KR20010072511A (fr)
DE (2) DE19927900A1 (fr)
WO (1) WO2000079120A1 (fr)

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DE19947779A1 (de) * 1999-10-02 2001-04-12 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19950761A1 (de) * 1999-10-21 2001-04-26 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10039078A1 (de) * 2000-08-10 2002-02-21 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10063193A1 (de) * 2000-12-19 2002-06-27 Bosch Gmbh Robert Magnetventil zur Steuerung eines Einspritzventils einer Brennkraftmaschine
DE10108974A1 (de) 2001-02-24 2002-09-05 Bosch Gmbh Robert Brennstoffeinspritzventil
DE10118161B9 (de) * 2001-04-11 2004-09-09 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10118162B9 (de) * 2001-04-11 2004-09-09 Robert Bosch Gmbh Brennstoffeinspritzventil
DE10124747A1 (de) * 2001-05-21 2002-11-28 Bosch Gmbh Robert Brennstoffeinspritzventil
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DE10257896A1 (de) * 2002-12-11 2004-07-01 Robert Bosch Gmbh Brennstoffeinspritzventil und Verfahren zu dessen Herstellung
ITBO20030090A1 (it) * 2003-02-21 2004-08-22 Magneti Marelli Powertrain Spa Iniettore di carburante per un motore a combustione interna.
EP1460263B1 (fr) * 2003-03-19 2009-07-15 Continental Automotive GmbH Soupape d'injection avec une aiguille précontrainte par un ressort
DE10345967B4 (de) * 2003-10-02 2014-02-27 Robert Bosch Gmbh Brennstoffeinspritzventil
DE102004024533A1 (de) * 2004-05-18 2005-12-15 Robert Bosch Gmbh Brennstoffeinspritzventil
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DE102004037250B4 (de) * 2004-07-31 2014-01-09 Robert Bosch Gmbh Brennstoffeinspritzventil
JP2006097659A (ja) * 2004-09-30 2006-04-13 Nippon Soken Inc 燃料噴射弁
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JP4576345B2 (ja) 2006-02-17 2010-11-04 日立オートモティブシステムズ株式会社 電磁式燃料噴射弁
EP1845254A1 (fr) * 2006-04-11 2007-10-17 Siemens Aktiengesellschaft Ensemble de soupape
US8074625B2 (en) * 2008-01-07 2011-12-13 Mcalister Technologies, Llc Fuel injector actuator assemblies and associated methods of use and manufacture
JP4637931B2 (ja) * 2008-05-22 2011-02-23 三菱電機株式会社 燃料噴射弁
EP2123899B1 (fr) * 2008-05-23 2011-10-26 Delphi Technologies, Inc. Injecteur de carburant avec actionneur à solénoïde
DE102008002674B9 (de) * 2008-06-26 2010-10-21 INSTITUT FüR MIKROTECHNIK MAINZ GMBH Mikroventil und Abdichteinrichtung zur Verwendung in einem Mikrofluidiksystem sowie Verfahren zu deren Herstellung
JP4935882B2 (ja) * 2009-03-05 2012-05-23 株式会社デンソー 燃料噴射弁
JP4982546B2 (ja) * 2009-10-19 2012-07-25 日立オートモティブシステムズ株式会社 電磁式燃料噴射弁
JP5218487B2 (ja) * 2009-12-04 2013-06-26 株式会社デンソー 燃料噴射弁
EP2365205B1 (fr) 2010-03-03 2013-05-15 Continental Automotive GmbH Soupape d'injection
EP2436908A1 (fr) 2010-09-30 2012-04-04 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
US8528519B2 (en) 2010-10-27 2013-09-10 Mcalister Technologies, Llc Integrated fuel injector igniters suitable for large engine applications and associated methods of use and manufacture
JP5965253B2 (ja) 2012-02-20 2016-08-03 株式会社デンソー 燃料噴射弁
EP2852753B1 (fr) 2012-05-08 2019-07-17 CPT Group GmbH Boîtier de soupape destiné à une soupape d'injection et soupape d'injection
EP2703633A1 (fr) 2012-08-28 2014-03-05 Continental Automotive GmbH Ensemble de soupape pour soupape d'injection et soupape d'injection
EP2706221B1 (fr) * 2012-09-07 2016-07-13 Continental Automotive GmbH Ensemble de soupape destiné à un injecteur de carburant et injecteur de carburant
DE102012217322A1 (de) * 2012-09-25 2014-06-12 Robert Bosch Gmbh Einspritzventil
US9309846B2 (en) 2012-11-12 2016-04-12 Mcalister Technologies, Llc Motion modifiers for fuel injection systems
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EP2896813B1 (fr) * 2014-01-17 2018-01-10 Continental Automotive GmbH Soupape d'injection de carburant pour moteurs à combustion interne
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EP3009663B1 (fr) * 2014-10-15 2020-06-24 Vitesco Technologies GmbH Ensemble de soupape et injecteur de fluide
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EP3076004B1 (fr) * 2015-04-02 2018-09-12 Continental Automotive GmbH Ensemble de soupape avec un élément de retenue de particules et soupape de fluide
DE102015209553B3 (de) * 2015-05-26 2016-07-21 Continental Automotive Gmbh Elektromagnetische Schaltventilvorrichtung
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DE102015214171A1 (de) * 2015-07-27 2017-02-02 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102015215537A1 (de) * 2015-08-14 2017-02-16 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
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DE102017220323A1 (de) * 2017-11-15 2019-05-16 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
DE102017220798A1 (de) * 2017-11-21 2019-05-23 Robert Bosch Gmbh Dosierventil und Strahlpumpeneinheit zum Steuern eines gasförmigen Mediums
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DE102018201951A1 (de) * 2018-02-08 2019-08-08 Robert Bosch Gmbh Ventil zum Zumessen eines Fluids
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Also Published As

Publication number Publication date
DE19927900A1 (de) 2000-12-21
WO2000079120A1 (fr) 2000-12-28
EP1105639B1 (fr) 2005-01-26
KR20010072511A (ko) 2001-07-31
DE59911528D1 (de) 2005-03-03
US6520434B1 (en) 2003-02-18
JP2003502573A (ja) 2003-01-21

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