EP0952333A3 - Fuel injector for fuel injection systems - Google Patents

Fuel injector for fuel injection systems Download PDF

Info

Publication number
EP0952333A3
EP0952333A3 EP99106924A EP99106924A EP0952333A3 EP 0952333 A3 EP0952333 A3 EP 0952333A3 EP 99106924 A EP99106924 A EP 99106924A EP 99106924 A EP99106924 A EP 99106924A EP 0952333 A3 EP0952333 A3 EP 0952333A3
Authority
EP
European Patent Office
Prior art keywords
piezo stack
valve
nozzle needle
fuel
closing device
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
EP99106924A
Other languages
German (de)
French (fr)
Other versions
EP0952333A2 (en
EP0952333B1 (en
Inventor
Karl-Heinz Hoffmann
Heinz Öing
Gregor Dr. Renner
Reinhard Fischer
Günter Vogt
Jens-Peter Wobbe
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.)
Erphi-Electronic GmbH
P & S Prototypen und Sondermaschinen Entwicklu
Mercedes Benz Group AG
Original Assignee
ERPHI ELECTRONIC GmbH
Erphi-Electronic GmbH
P & S
DaimlerChrysler AG
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 ERPHI ELECTRONIC GmbH, Erphi-Electronic GmbH, P & S, DaimlerChrysler AG filed Critical ERPHI ELECTRONIC GmbH
Publication of EP0952333A2 publication Critical patent/EP0952333A2/en
Publication of EP0952333A3 publication Critical patent/EP0952333A3/en
Application granted granted Critical
Publication of EP0952333B1 publication Critical patent/EP0952333B1/en
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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/002—Arrangement of leakage or drain conduits in or from injectors
    • 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
    • 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

Landscapes

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

Abstract

Ein Einspritzventil (1) für ein Kraftstoffeinspritzsystem ist mit einem Injektorgehäuse (2), in welchem ein Piezostack (4) angeordnet ist, und mit einem mit dem Injektorgehäuse (2) verbundenen Ventilgehäuse (6), in dem eine mit einer Düsennadel (8) versehene Ventilverschließeinrichtung (7) verschiebbar angeordnet ist, versehen. Die Ventilverschließeinrichtung (7) ist durch den Piezostack (4) betätigbar. Durch eine Rückstelleinrichtung ist die Ventilverschließeinrichtung (7) rückstellbar. Zwischen dem Piezostack (4) und der Düsennadel (8) der Ventilverschließeinrichtung (7) ist ein hydraulischer Folgeverstärker mit einem von dem Piezostack (4) betätigten Verdrängerkolben (21), einem dem Verdrängerkolben (21) nachgeschalteten, den Verstellweg vergrößernden Steuerkolben (22) und einem die Düsennadel (8) betätigenden und die Betätigungskraft erhöhenden Arbeitskolben (34) angeordnet.

Figure 00000001
An injection valve (1) for a fuel injection system is provided with an injector housing (2), in which a piezo stack (4) is arranged, and with a valve housing (6) connected to the injector housing (2), in which one with a nozzle needle (8) provided valve closure device (7) is arranged displaceably. The valve closing device (7) can be actuated by the piezo stack (4). The valve closing device (7) can be reset by a reset device. Between the piezo stack (4) and the nozzle needle (8) of the valve closing device (7) there is a hydraulic sequence amplifier with a displacement piston (21) actuated by the piezo stack (4), a control piston (22) connected downstream of the displacement piston (21) and increasing the adjustment path. and a working piston (34) which actuates the nozzle needle (8) and increases the actuating force.
Figure 00000001
EP99106924A 1998-04-18 1999-04-08 Fuel injector for fuel injection systems Expired - Lifetime EP0952333B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19817320A DE19817320C1 (en) 1998-04-18 1998-04-18 Injector for fuel injection systems
DE19817320 1998-04-18

Publications (3)

Publication Number Publication Date
EP0952333A2 EP0952333A2 (en) 1999-10-27
EP0952333A3 true EP0952333A3 (en) 2002-02-13
EP0952333B1 EP0952333B1 (en) 2004-06-23

Family

ID=7865016

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99106924A Expired - Lifetime EP0952333B1 (en) 1998-04-18 1999-04-08 Fuel injector for fuel injection systems

Country Status (3)

Country Link
US (1) US6302333B1 (en)
EP (1) EP0952333B1 (en)
DE (2) DE19817320C1 (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19953562A1 (en) * 1999-11-08 2001-05-23 Bosch Gmbh Robert Fuel injector
DE10000575A1 (en) * 2000-01-10 2001-07-19 Bosch Gmbh Robert Fuel injection nozzle with pressure and control chambers uses pressure rod with re-set piston on non-seat side and larger in area than seat and their difference but smaller than pressure rod area.
DE10006319A1 (en) * 2000-02-12 2001-08-16 Daimler Chrysler Ag Fuel injection valve for an IC motor has a shaped structure as a limit stop for the movement of the piston and the jet needle to give a defined volume of injected fuel into the cylinders each time
ES2280318T3 (en) 2000-07-18 2007-09-16 Delphi Technologies, Inc. FUEL INJECTOR.
DE10112147A1 (en) * 2001-03-14 2002-09-19 Bosch Gmbh Robert Valve for controlling liquids
ITBO20010279A1 (en) * 2001-05-08 2002-11-08 Magneti Marelli Spa FUEL INJECTOR WITH PIEZOELECTRIC ACTUATOR HOUSED IN AN INSULATED CHAMBER
DE10133265A1 (en) * 2001-07-09 2003-01-23 Bosch Gmbh Robert Fuel injection valve with piezoelectric or magnetostrictive actuator, has hydraulic coupling valve closure body and seat surface urged pressed together by spring
US6766965B2 (en) * 2001-08-31 2004-07-27 Siemens Automotive Corporation Twin tube hydraulic compensator for a fuel injector
US6792921B2 (en) * 2001-12-17 2004-09-21 Caterpillar Inc Electronically-controlled fuel injector
US6983894B2 (en) 2002-02-13 2006-01-10 Siemens Vdo Automotive Inc. Piezo-electrically actuated canister purge valve with a hydraulic amplifier
EP1391607A1 (en) * 2002-08-20 2004-02-25 Siemens VDO Automotive S.p.A. Metering device
US6811093B2 (en) * 2002-10-17 2004-11-02 Tecumseh Products Company Piezoelectric actuated fuel injectors
DE10310790A1 (en) * 2003-03-12 2004-09-23 Robert Bosch Gmbh Fuel injection valve for IC engine fuel injection system, has hydraulic coupler between actuator and valve group incorporating valve closure and valve seat surface
DE102004027824A1 (en) 2004-06-08 2006-01-05 Robert Bosch Gmbh Fuel injector with variable actuator ratio
DE102004035280A1 (en) * 2004-07-21 2006-03-16 Robert Bosch Gmbh Fuel injector with direct multi-stage injection valve element control
DE102005008972A1 (en) * 2005-02-28 2006-08-31 Robert Bosch Gmbh Injection jet for internal combustion engine has traveling coupling which mechanically couples coupling piston to transfer piston at start of opening stroke
US7307371B2 (en) * 2005-11-18 2007-12-11 Delphi Technologies, Inc. Actuator with amplified stroke length
US7628139B2 (en) * 2006-07-11 2009-12-08 Detroit Diesel Corporation Fuel injector with dual piezo-electric actuator
US7658179B2 (en) * 2008-05-28 2010-02-09 Caterpillar Inc. Fluid leak limiter
US7661410B1 (en) 2008-08-18 2010-02-16 Caterpillar Inc. Fluid leak limiter
DE102012212266B4 (en) * 2012-07-13 2015-01-22 Continental Automotive Gmbh fluid injector
DE102012212264B4 (en) 2012-07-13 2014-02-13 Continental Automotive Gmbh Method for producing a solid state actuator
DE102014009025B4 (en) * 2014-06-24 2016-02-18 Airbus Ds Gmbh Bending frame for Velängerung the travel of an actuator for a mechanically operated component

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3635016A (en) * 1967-09-27 1972-01-18 Physics Int Co Electromechanical actuator having an active element of electroexpansive material
DE19500706A1 (en) * 1995-01-12 1996-07-18 Bosch Gmbh Robert Metering valve for dosing liquids or gases
DE19519191A1 (en) * 1995-05-24 1996-12-19 Siemens Ag Injector
EP0816670A1 (en) * 1996-07-02 1998-01-07 Siemens Automotive Corporation Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3533085A1 (en) * 1985-09-17 1987-03-26 Bosch Gmbh Robert METERING VALVE FOR DOSING LIQUIDS OR GASES
DE4311627B4 (en) * 1993-04-08 2005-08-25 Robert Bosch Gmbh Fuel injection device for internal combustion engines
DE19701288C2 (en) * 1997-01-16 1999-10-14 Daimler Benz Ag Valve for dispensing fluids

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3635016A (en) * 1967-09-27 1972-01-18 Physics Int Co Electromechanical actuator having an active element of electroexpansive material
DE19500706A1 (en) * 1995-01-12 1996-07-18 Bosch Gmbh Robert Metering valve for dosing liquids or gases
DE19519191A1 (en) * 1995-05-24 1996-12-19 Siemens Ag Injector
EP0816670A1 (en) * 1996-07-02 1998-01-07 Siemens Automotive Corporation Piezoelectric controlled common rail injector with hydraulic amplification of piezoelectric stroke

Also Published As

Publication number Publication date
EP0952333A2 (en) 1999-10-27
US6302333B1 (en) 2001-10-16
DE59909783D1 (en) 2004-07-29
EP0952333B1 (en) 2004-06-23
DE19817320C1 (en) 1999-11-11

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