EP1431568A2 - Soupape d'injection de carburant - Google Patents

Soupape d'injection de carburant Download PDF

Info

Publication number
EP1431568A2
EP1431568A2 EP03015164A EP03015164A EP1431568A2 EP 1431568 A2 EP1431568 A2 EP 1431568A2 EP 03015164 A EP03015164 A EP 03015164A EP 03015164 A EP03015164 A EP 03015164A EP 1431568 A2 EP1431568 A2 EP 1431568A2
Authority
EP
European Patent Office
Prior art keywords
actuator
fuel injection
injection valve
flexible section
actuator housing
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
EP03015164A
Other languages
German (de)
English (en)
Other versions
EP1431568A3 (fr
EP1431568B1 (fr
Inventor
Uwe Liskow
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 EP1431568A2 publication Critical patent/EP1431568A2/fr
Publication of EP1431568A3 publication Critical patent/EP1431568A3/fr
Application granted granted Critical
Publication of EP1431568B1 publication Critical patent/EP1431568B1/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
    • F02M61/04—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
    • 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
    • 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.
  • Fuel injector with a piezoelectric actuator known, which via a confirmation strand in Operational connection with a valve closing body.
  • One too valve needle belonging to a confirmation string instructs their spray-side end on the valve closing body cooperates with a valve seat surface to form a sealing seat.
  • the actuator is arranged in an upper housing part.
  • On flexible section in the form of a spring membrane seals the upper housing part against one filled with fuel lower part of the housing hermetically.
  • the flexible section is extensive on the one hand to the confirmation strand belonging actuator and on the other hand on the inner surfaces of the lower housing part hermetically sealed.
  • a disadvantage of the prior art is that one filled with a heat-conducting liquid Actuator housing, the flexible section between the Inside of the actuator housing and the exterior of the actuator housing lies and directly connected to the actuating strand is, both from the force effect of the movement of the Confirmation strand as well as the pressure effects in the Inside the actuator housing is applied.
  • the flexible one Section cannot therefore refer to any of these Force effects can be optimized. This results in for example increased force effects of the flexible Section on the confirmation strand, what negative Have an influence on the valve dynamics. Furthermore, this can for example the life of the flexible section be shortened.
  • the fuel injector according to the invention with the Features of claim 1 has the advantage that the flexible section which is connected to the actuating strand is connected and the interior of the actuator housing from the Hermetically seals the exterior of the actuator housing with respect the force effects of the actuation train movements optimized can be. Force effects resulting from pressure fluctuations in the Inside of the actuator housing come from Differences in pressure between the inside of the actuator housing and the exterior of the actuator housing must come from the Dimensioning and design of the flexible section are not taken into account as these force effects too to a large extent be compensated for by the compensation element.
  • the movements of the actuation line do not work directly on the compensating element, since it is structurally from Actuating string is separated.
  • the compensation element can thereby with regard to the force effect of the pressure differences be optimized.
  • the relief of the flexible section means that the flexible section regarding the forces over the Act on the confirmation strand on the flexible section, can be claimed more. Especially at Reciprocating internal combustion engines this allows an increase in the injection frequency. Moreover the life of the seal is increased.
  • the strain on the flexible section Movements in the confirmation thread will be on a larger scale Distributed length. This results in a reduced Stress on the flexible section per unit length.
  • Fuel injector is the balancing element one Membrane.
  • Membranes can be simple and inexpensive are produced, the properties of the membrane, such as z. B. the flexibility set in a simple manner can be.
  • the fuel injector is the compensating element and / or the flexible section at least partially Metal, in particular steel.
  • Metals are excellent adjustable plastic and elastic properties. steel has one in the range of operating temperatures Fuel injector fluctuating little Properties on and can be procured and inexpensive are processed.
  • the actuator housing is on the Connection point to the compensation element flattened or flattened and thus forms a non-curved, two-dimensional plane. This allows the compensation element for example made from a simple plate become. Tensions within the compensation element and on the connection point between the actuator housing and Compensating element are thereby avoided.
  • the actuator housing can advantageously be made of fuel be flowed around.
  • the heat loss of the actuator is thus in simple way about the heat-conducting medium and Actuator housing dissipated to the fuel.
  • A is advantageously used as the heat-conducting medium used incompressible liquid.
  • An adaptation of the Compensation elements due to a pressure-dependent Volume change of the heat-conducting medium can thus omitted.
  • the heat-conducting medium is advantageously electrical not conductive, so an additional, heat-insulating and fault-prone insulation of the actuator to be dispensed with.
  • the heat-conducting medium is advantageously chemical neutral. The lifespan and reliability of that Components in contact with the heat-conducting medium are thereby elevated.
  • the flexible section is advantageously corrugated trained, so the flexible section causes axial extension or compression no pressure difference between the inside and outside of the actuator housing.
  • Fuel injector 1 is used especially for direct injection of fuel into a combustion chamber of a mixture-compressing, spark-ignited Internal combustion engine.
  • a housing 2 are coaxial to each other a piston-shaped coupler 18, a cylindrical or round cylindrical actuator housing 12; a guide body 9 and a valve needle 3 with a Valve closing body 4 arranged.
  • the housing 2 instructs a fuel feed at its upper end remote from the spray 17 on.
  • the coupler 18 is supported with its upper end against the inside of the upper end of the housing 2. At the The bottom of the coupler 18 closes the cylindrical one Actuator housing 12 on.
  • a piston-shaped actuator 14 between the inside of the upper End of the actuator housing 12 and a T-shaped in cross section Actuator pin 13 arranged.
  • the cross section of the actuator 14 can, deviating from a circular cross section, also be square or perforated.
  • the actuator housing 12 deviating from a round one Cross section, corresponding to the cross section of the actuator 14 be shaped.
  • Das Longitudinal element of the T-shaped actuator pin 13 passes through the Underside of the actuator housing 12.
  • the actuator housing 12 is complete with a heat conductive medium filled.
  • the heat-conducting medium is an electrically non-conductive Oil.
  • the disc-shaped guide body 9, in which both lower end of the actuator pin 13 as well as the upper end of the Valve needle 3 are guided, has a fuel channel 10 on.
  • the valve needle is on the spray side of the guide body 9 3 with its valve closing body 4, a return spring 7, a flange 8 and a spray opening 5 are arranged.
  • the Return spring 7 is supported on the inside of the lower End of the actuator housing 12 and presses into the valve needle 3 with the flange 8 fixed to the valve needle 3 a bias against the lower end of the actuator pin 13.
  • An electrical connector 20 is through the top of the Housing 2 and laterally through the actuator housing 12 to the actuator 14 out.
  • the compensating element 16 has in this Embodiment the shape of a membrane is made of steel manufactured and hermetically seals the opening 21.
  • the operation of the fuel injector 1 is like follows:
  • actuator 14 In the rest position of the opening to the outside Fuel injector 1, actuator 14 is not energized.
  • the return spring 7 presses over the flange 8 and Valve needle 3 the valve closing body 4 against one in the Spray opening 5 arranged valve seat 6. A through the valve closing body 4 and the valve seat surface 6 formed sealing seat is thus closed.
  • the compensating element 16 compensates for pressure differences that in particular by changes in the volume of the actuator 14 are caused.
  • the volume changes are over the actuator housing completely filled with the heat-conducting oil 12 on the flexible section 11 and the compensating element 16 transferred in the form of a pressure change. That in comparison to the flexible section 11 softer and more compliant designed compensation element 16 is the same Volume changes and relieves the flexible section 11 thereby from a pressure load, in particular by Volume changes of the actuator 14 and the thermally conductive Medium are caused.
  • the one in this embodiment Flexible section 11 can be of corrugated tube design therefore with sufficient pressure relief by a simple membrane, not shown, to be replaced.
  • the fuel injector 1 can also not have shown stroke translation device, which converts a small actuator stroke to a larger valve stroke.
  • the stroke transmission device not shown, can be part of the confirmation thread 3.13.
  • the coupler 18 is used in particular to compensate for the Thermal expansion of the actuator 14 is compared to him surrounding fuel hermetically sealed and preferably with a flat membrane, not shown executed.
  • the coupler 18 can also between the actuator 14 and Valve needle 3 arranged and part of the confirmation strand 3.13, wherein the actuator housing 19 on the remote spray End would lie on the inside of the housing 2. A not The coupler pin shown then transmits the stroke of the actuator 14 on the valve needle 3.
  • Fig. 2 shows a schematic representation of a second Embodiment of an inventive Fuel injection valve 1, similar to the first one in FIG. 1 illustrated embodiment.
  • the flexible section 11 forms an exemplary embodiment Most of the actuator housing 12.
  • the radial to the actuator 14 arranged sides 19 of the actuator housing 12 are in this Embodiment completely through the flexible Section 11 formed, the flexible section 11 the Has the shape of a corrugated tube.
  • the flexible section 11 can at least over the extend the entire length of the actuator 14. Forces that come from Differences in pressure between the inside and the outside of the Actuator housing 12 originate, are evenly over the enlarged area of the flexible portion 11 distributed. The vigorous loading of the flexible section 11 pro Area unit due to pressure differences is thus reduced.
  • the stress on the flexible section 11 by the Movements of the confirmation strand 3.13 are on a distributed greater length. This results in a reduced Stress on the flexible section 11 per unit length.
  • the invention is not shown on the Embodiments limited and z. B. also for after internal fuel injectors can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
EP20030015164 2002-12-19 2003-07-04 Soupape d'injection de carburant Expired - Lifetime EP1431568B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10259801 2002-12-19
DE2002159801 DE10259801A1 (de) 2002-12-19 2002-12-19 Brennstoffeinspritzventil

Publications (3)

Publication Number Publication Date
EP1431568A2 true EP1431568A2 (fr) 2004-06-23
EP1431568A3 EP1431568A3 (fr) 2004-12-29
EP1431568B1 EP1431568B1 (fr) 2011-02-23

Family

ID=32336493

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20030015164 Expired - Lifetime EP1431568B1 (fr) 2002-12-19 2003-07-04 Soupape d'injection de carburant

Country Status (3)

Country Link
EP (1) EP1431568B1 (fr)
JP (1) JP2004197743A (fr)
DE (2) DE10259801A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005116440A1 (fr) * 2004-05-28 2005-12-08 Siemens Aktiengesellschaft Soupape d'injection
EP1816341A1 (fr) * 2006-02-03 2007-08-08 Siemens Aktiengesellschaft Unité d'actionnement pour buse d'injection et buse d'injection
EP1854992A1 (fr) * 2006-05-09 2007-11-14 Siemens Aktiengesellschaft Système d'injection de carburant et procédé de fabrication
WO2007131964A1 (fr) * 2006-05-17 2007-11-22 Robert Bosch Gmbh Système pourvu d'un piézoactionneur traversé par des milieux liquides
WO2009059864A1 (fr) * 2007-11-09 2009-05-14 Robert Bosch Gmbh Module actionneur piézoélectrique
EP2568155A1 (fr) * 2011-09-09 2013-03-13 Continental Automotive GmbH Ensemble de soupape et soupape d'injection
US8763767B2 (en) 2004-07-07 2014-07-01 Continental Automotive Gmbh Electronic parking brake and method for controlling an electronic parking brake

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5246149B2 (ja) * 2009-12-08 2013-07-24 株式会社デンソー インジェクタ
JP2017066955A (ja) * 2015-09-30 2017-04-06 日立オートモティブシステムズ株式会社 流量制御弁

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005455A1 (de) 1989-02-28 1990-08-30 Volkswagen Ag Zumessventil, insbesondere kraftstoff-einspritzventil fuer eine brennkraftmaschine

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19857247C1 (de) * 1998-12-11 2000-01-27 Bosch Gmbh Robert Piezoelektrischer Aktor
DE19912666A1 (de) * 1999-03-20 2000-09-21 Bosch Gmbh Robert Brennstoffeinspritzentil
DE10035168A1 (de) * 2000-07-19 2002-02-07 Siemens Ag Stellantrieb, Ventil sowie Verfahren zum Herstellen eines Stellantriebs
DE10048430A1 (de) * 2000-09-29 2002-04-25 Bosch Gmbh Robert Piezoelektrischer Aktor
DE10054017A1 (de) * 2000-11-01 2002-05-08 Bosch Gmbh Robert Piezoaktormodul mit Vorrichtung zur Wärmeableitung
DE10245109A1 (de) * 2002-09-27 2004-04-08 Siemens Ag Injektor, insbesondere Kraftstoff-Einspritzventil, mit einem piezoelektrischen Aktor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4005455A1 (de) 1989-02-28 1990-08-30 Volkswagen Ag Zumessventil, insbesondere kraftstoff-einspritzventil fuer eine brennkraftmaschine

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005116440A1 (fr) * 2004-05-28 2005-12-08 Siemens Aktiengesellschaft Soupape d'injection
US8763767B2 (en) 2004-07-07 2014-07-01 Continental Automotive Gmbh Electronic parking brake and method for controlling an electronic parking brake
US8162240B2 (en) 2006-02-03 2012-04-24 Continental Automotive Gmbh Actor device for an injector and injector
EP1816341A1 (fr) * 2006-02-03 2007-08-08 Siemens Aktiengesellschaft Unité d'actionnement pour buse d'injection et buse d'injection
EP1854992A1 (fr) * 2006-05-09 2007-11-14 Siemens Aktiengesellschaft Système d'injection de carburant et procédé de fabrication
US8038079B2 (en) 2006-05-09 2011-10-18 Continental Automotive Gmbh Injection system and a method for producing an injection system
WO2007131964A1 (fr) * 2006-05-17 2007-11-22 Robert Bosch Gmbh Système pourvu d'un piézoactionneur traversé par des milieux liquides
WO2009059864A1 (fr) * 2007-11-09 2009-05-14 Robert Bosch Gmbh Module actionneur piézoélectrique
EP2568155A1 (fr) * 2011-09-09 2013-03-13 Continental Automotive GmbH Ensemble de soupape et soupape d'injection
WO2013034477A1 (fr) * 2011-09-09 2013-03-14 Continental Automotive Gmbh Ensemble soupape et injecteur
CN103764995A (zh) * 2011-09-09 2014-04-30 大陆汽车有限公司 阀组件和喷射阀
KR20140059299A (ko) * 2011-09-09 2014-05-15 콘티넨탈 오토모티브 게엠베하 밸브 조립체 및 분사 밸브
US9574532B2 (en) 2011-09-09 2017-02-21 Continental Automotive Gmbh Valve assembly and injection valve

Also Published As

Publication number Publication date
EP1431568A3 (fr) 2004-12-29
DE50313486D1 (de) 2011-04-07
EP1431568B1 (fr) 2011-02-23
JP2004197743A (ja) 2004-07-15
DE10259801A1 (de) 2004-07-01

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