EP1688611A2 - Injecteur de carburant à commande de pointeau directe pour un moteur à combustion interne - Google Patents

Injecteur de carburant à commande de pointeau directe pour un moteur à combustion interne Download PDF

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Publication number
EP1688611A2
EP1688611A2 EP05112500A EP05112500A EP1688611A2 EP 1688611 A2 EP1688611 A2 EP 1688611A2 EP 05112500 A EP05112500 A EP 05112500A EP 05112500 A EP05112500 A EP 05112500A EP 1688611 A2 EP1688611 A2 EP 1688611A2
Authority
EP
European Patent Office
Prior art keywords
side pressure
nozzle needle
piston
actuator
space
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
EP05112500A
Other languages
German (de)
English (en)
Other versions
EP1688611B1 (fr
EP1688611A3 (fr
Inventor
Thomas Pauer
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 EP1688611A2 publication Critical patent/EP1688611A2/fr
Publication of EP1688611A3 publication Critical patent/EP1688611A3/fr
Application granted granted Critical
Publication of EP1688611B1 publication Critical patent/EP1688611B1/fr
Ceased legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F02M63/0059—Arrangements of valve actuators
    • F02M63/0061—Single actuator acting on two or more valve bodies
    • 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
    • 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
    • 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
    • F02M2200/704—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with actuator and actuated element moving in different directions, e.g. in opposite directions
    • 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
    • F02M2200/705—Linkage between actuator and actuated element, e.g. between piezoelectric actuator and needle valve or pump plunger hydraulic with means for filling or emptying hydraulic chamber, e.g. for compensating clearance or thermal expansion

Definitions

  • Fuel injectors with a so-called direct needle control are known. Such fuel injectors come without an intermediate control valve between an electrically actuated actuator and a nozzle needle. The power transmission between the actuator and the nozzle needle is realized by means of a pressure booster device.
  • piezoelectric actuators are suitable as actuators, which, depending on the energization in the closed state, have a direct or inverse control. In a direct control of the piezoelectric actuator is energized to open the nozzle needle, so that a linear expansion of the piezoelectric actuator realized by an oppressive movement opening of the injectors, which is amplified by the pressure booster device. In the closed state, the piezoelectric actuator has a smaller linear expansion.
  • the actuator In order to be able to open the injectors directly in fuel injectors with direct needle control by means of the actuator, the actuator must overcome a high opening force.
  • the required opening force to be applied by the actuator is due to the fact that the nozzle needle is pressed into its seat with system pressure (pressure level in high-pressure accumulator).
  • the forces required to open the nozzle needle from its seat can be up to 400 Newton.
  • the nozzle needle In order to ensure sufficient fuel flow in fully opened injectors injection into the combustion chamber of a self-igniting internal combustion engine, it is also required that the nozzle needle performs a maximum stroke of several 100 microns.
  • Figure 1 shows a schematic representation of a fuel injector according to the invention in longitudinal section.
  • the actuator receiving space 18 merges into a receiving space 22 for a pressure booster 30.
  • the pressure booster 30 has an actuator-side pressure booster piston 31, a nozzle needle side pressure booster piston 32, a coupler space 33, a control piston 34, a guide sleeve 35, an inner rear space 36 and an outer rear space 37.
  • the actuator-side pressure booster piston 31 and the nozzle needle-side pressure booster piston 32 are guided in the guide sleeve 35.
  • a piston spring 38 is arranged, which presses a formed on the guide sleeve 35 sealing surface 39 against an opening formed on the nozzle needle guide 12 face 23.
  • the piston spring 38 also biases the actuator-side pressure booster piston 31 against the piezo-actuator 20.
  • a closing spring 25 which presses the nozzle needle 14 in the closing direction, engages on the nozzle needle 14.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
EP05112500A 2005-02-02 2005-12-20 Injecteur de carburant à commande de pointeau directe pour un moteur à combustion interne Ceased EP1688611B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005004738A DE102005004738A1 (de) 2005-02-02 2005-02-02 Kraftstoffinjektor mit direkter Nadelsteuerung für eine Brennkraftmaschine

Publications (3)

Publication Number Publication Date
EP1688611A2 true EP1688611A2 (fr) 2006-08-09
EP1688611A3 EP1688611A3 (fr) 2007-01-10
EP1688611B1 EP1688611B1 (fr) 2008-07-30

Family

ID=36182388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05112500A Ceased EP1688611B1 (fr) 2005-02-02 2005-12-20 Injecteur de carburant à commande de pointeau directe pour un moteur à combustion interne

Country Status (4)

Country Link
US (1) US7419103B2 (fr)
EP (1) EP1688611B1 (fr)
AT (1) ATE403082T1 (fr)
DE (2) DE102005004738A1 (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10326259A1 (de) * 2003-06-11 2005-01-05 Robert Bosch Gmbh Injektor für Kraftstoff-Einspritzsysteme von Brennkraftmaschinen, insbesondere von direkteinspritzenden Dieselmotoren
DE10352736A1 (de) * 2003-11-12 2005-07-07 Robert Bosch Gmbh Kraftstoffinjektor mit direkter Nadeleinspritzung
DE102005012929A1 (de) * 2005-03-21 2006-09-28 Robert Bosch Gmbh Kraftstoffinjektor mit direkter Steuerung des Einspritzventilglieds und variabler Übersetzung
DE102005016796A1 (de) * 2005-04-12 2006-10-19 Robert Bosch Gmbh Zweistufig öffnender Kraftstoffinjektor
DE102005025953A1 (de) * 2005-06-06 2006-12-07 Siemens Ag Einspritzventil und Ausgleichselement für ein Einspritzventil
DE102005036444A1 (de) * 2005-08-03 2007-02-08 Robert Bosch Gmbh Einspritzdüse
DE102006008648A1 (de) * 2006-02-24 2007-08-30 Robert Bosch Gmbh Kraftstoffeinspritzvorrichtung für eine Brennkraftmaschine
US8074625B2 (en) 2008-01-07 2011-12-13 Mcalister Technologies, Llc Fuel injector actuator assemblies and associated methods of use and manufacture
DE102008008847A1 (de) 2008-02-13 2009-08-27 Robert Bosch Gmbh Kraftstoffinjektor mit einer direkt gesteuerten Ventilnadel
DE102008032133B4 (de) * 2008-07-08 2015-08-20 Continental Automotive Gmbh Kraftstoffeinspritzvorrichtung
DE102009024595A1 (de) * 2009-06-10 2011-03-24 Continental Automotive Gmbh Einspritzventil mit Übertragungseinheit
DE102009024596A1 (de) 2009-06-10 2011-04-07 Continental Automotive Gmbh Einspritzventil mit Übertragungseinheit
DE102012212264B4 (de) 2012-07-13 2014-02-13 Continental Automotive Gmbh Verfahren zum Herstellen eines Festkörperaktuators
DE102012212266B4 (de) * 2012-07-13 2015-01-22 Continental Automotive Gmbh Fluidinjektor
US9309846B2 (en) 2012-11-12 2016-04-12 Mcalister Technologies, Llc Motion modifiers for fuel injection systems
US20140131466A1 (en) 2012-11-12 2014-05-15 Advanced Green Innovations, LLC Hydraulic displacement amplifiers for fuel injectors
WO2014144807A1 (fr) * 2012-11-12 2014-09-18 Mcalister Technologies, Llc Systèmes et procédés permettant une compensation et une amplification de mouvement par déplacement de fluide
DE102013219225A1 (de) * 2013-09-25 2015-03-26 Continental Automotive Gmbh Piezo-Injektor zur Kraftstoff-Direkteinspritzung
DE102014211334B3 (de) * 2014-06-13 2015-08-27 Continental Automotive Gmbh Verfahren zur Charakterisierung eines hydraulischen Koppelelementes eines Piezo-Injektors

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10326046A1 (de) 2003-06-10 2004-12-30 Robert Bosch Gmbh Einspritzdüse für Brennkraftmaschinen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4784102A (en) * 1984-12-25 1988-11-15 Nippon Soken, Inc. Fuel injector and fuel injection system
DE19712921A1 (de) * 1997-03-27 1998-10-01 Bosch Gmbh Robert Brennstoffeinspritzventil mit piezoelektrischem oder magnetostriktivem Aktor
GB9925753D0 (en) * 1999-10-29 1999-12-29 Lucas Industries Ltd Fuel injector
ATE353118T1 (de) * 2000-07-18 2007-02-15 Delphi Tech Inc Kraftstoffeinspritzventil
US6766965B2 (en) * 2001-08-31 2004-07-27 Siemens Automotive Corporation Twin tube hydraulic compensator for a fuel injector
DE10347769B3 (de) * 2003-10-14 2005-01-13 Siemens Ag Stellgerät

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10326046A1 (de) 2003-06-10 2004-12-30 Robert Bosch Gmbh Einspritzdüse für Brennkraftmaschinen

Also Published As

Publication number Publication date
DE502005004874D1 (de) 2008-09-11
US7419103B2 (en) 2008-09-02
DE102005004738A1 (de) 2006-08-10
EP1688611B1 (fr) 2008-07-30
ATE403082T1 (de) 2008-08-15
EP1688611A3 (fr) 2007-01-10
US20060169802A1 (en) 2006-08-03

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